CN114961610B - Wellhead type coiled tubing hanger and hanging process - Google Patents
Wellhead type coiled tubing hanger and hanging process Download PDFInfo
- Publication number
- CN114961610B CN114961610B CN202110189548.5A CN202110189548A CN114961610B CN 114961610 B CN114961610 B CN 114961610B CN 202110189548 A CN202110189548 A CN 202110189548A CN 114961610 B CN114961610 B CN 114961610B
- Authority
- CN
- China
- Prior art keywords
- wellhead
- coiled tubing
- slips
- continuous pipe
- hanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 75
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 241000191291 Abies alba Species 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a wellhead type continuous pipe hanger and a hanging process. Wherein, well head formula coiled tubing hanger includes: the shell is provided with an inner cavity, the inner cavity is provided with a bell mouth shape, and the continuous pipe can be arranged in the inner cavity in a penetrating way; the slips are movably arranged in the inner cavity and are abutted against the bell-mouthed inclined surface, and each slip can move along the bell-mouthed inclined surface in a direction approaching to each other to clamp the continuous pipe or move in a direction separating from each other to release the continuous pipe; the locking component stretches into the inner cavity and is connected with the slips, the locking component can drive the slips to move so as to clamp or release the coiled tubing, and the locking component can lock the positions of the slips. The invention solves the problems of complicated field operation and high operation cost of the large-size continuous pipe completion well in the prior art.
Description
Technical Field
The invention relates to the technical field of oil and gas well production operation, in particular to a wellhead type continuous pipe hanger and a hanging process.
Background
The continuous pipe is used as a speed pipe column for drainage and gas production, so that the problems of secondary well completion and production recovery and production stabilization of the old well of a low-pressure low-yield small-water gas well are well solved, the well completion and gas production of the large-size continuous pipe applied to a new well is gradually expanded, the advantages of the continuous pipe such as quick tripping under pressure are utilized, and the problems of pressurized production and low-cost development of the new well are solved. Unlike the secondary completion of coiled tubing in old well tubing, the new well coiled tubing completion is mainly to directly run into coiled tubing in a casing as a production channel, and in order to meet the production requirements of accurate positioning of the running depth, initial high-pressure production throttling, layered exploitation and the like, tools such as a large-size collar positioner, a downhole choke or production zone separation which are suitable for the inner diameter of the casing are required to be run into along with the coiled tubing. In order to meet the requirements of running and pressurized operation of a large-size tool on a coiled tubing, an operation wellhead is required to be provided with a large-diameter wellhead blowout preventer device with a large diameter corresponding to the inner diameter of a casing.
In order to meet the requirements of running and pressurized operation of large-size tools with continuous pipes, the disclosed patent technology mainly comprises two modes of underground hanging and wellhead hanging. In the aspect of underground suspension, a similar mechanical or hydraulic setting packer tool is mainly used for suspending a coiled tubing at a design position below a wellhead, such as a patent CN204326985U, CN205277365U, the borehole and a blowout preventer are required to work, the drift diameter is slightly larger than or equal to the inner diameter of a casing, but the wellhead is required to be temporarily suspended and the coiled tubing is cut off when the similar patent is implemented on site, a matched sending tool string is used for sending the suspension setting tool connected with the coiled tubing into a shaft for setting at a certain depth, then the suspension setting tool is released, the wellhead is required to be detached for many times in the working process, and the matched special sending tool string and a pump truck are matched for working, so that the process is complex, the construction period is long, and the working cost is high. In the aspect of wellhead hanging, patents like CN202745789U, CN202745939U, CN204082060U and the like are all provided with a special hanger hanging continuous pipe on a wellhead No. 1 main valve, the matched construction operation flow is simple, the construction efficiency is high, but a wellhead operation window device is required to be matched for use in operation to put in hanging slips, although the hanging slips putting mode and structure of the patent CN204312013U, CN203050597 are improved, the inconvenience and matched cost of using the operation window to put in the slips are avoided, the hanger disclosed in the patent above is of an integral structure as a shell and an annular sealing rubber cylinder of the hanger are improved and optimized, and the maximum effective inner drift diameter of the hanger is smaller than the nominal value specified by the national standard of the oil gas wellhead, so that the requirement of the wellhead with a large drift diameter is difficult to meet. The patent CN205000922U, CN207437022U utilizes the special tubing hanger matched with the original well tubing head and the large-diameter blowout-preventing ram blowout preventer to realize the passing of large-size tools and the hanging of a continuous pipe, but when the CN205000922U is implemented on site, the wellhead is required to be additionally matched with the blowout preventer with the 180mm nominal inner diameter, which is high in price and low in daily operation utilization rate, so that the operation matching cost is increased, meanwhile, the operation flow is similar to that of the underground hanging continuous pipe, the matched special feeding tool string and a pump truck are required to be matched for operation, the process is complex, the construction period is long, and the operation cost is high. The patent CN207437022U needs to be matched with a large-drift diameter blowout preventer which is special for continuous pipe daily operation, has high cost and has a nominal drift diameter of 130mm or more, is used as a semi-permanent hanger to be installed at a wellhead for a long time, and has high input cost of single-well consumable hardware.
Disclosure of Invention
The invention mainly aims to provide a wellhead type continuous pipe hanger and a hanging process, which are used for solving the problems of complicated field operation and high operation cost of a large-size continuous pipe completion well in the prior art.
To achieve the above object, according to one aspect of the present invention, there is provided a wellhead-type coiled tubing hanger comprising: the shell is provided with an inner cavity, the inner cavity is provided with a bell mouth shape, and the continuous pipe can be arranged in the inner cavity in a penetrating way; the slips are movably arranged in the inner cavity and are abutted against the bell-mouthed inclined surface, and each slip can move along the bell-mouthed inclined surface in a direction approaching to each other to clamp the continuous pipe or move in a direction separating from each other to release the continuous pipe; the locking component stretches into the inner cavity and is connected with the slips, the locking component can drive the slips to move so as to clamp or release the coiled tubing, and the locking component can lock the positions of the slips.
Further, the large mouth end of the bell mouth shape is arranged upwards, the inner cavity is also provided with an inverted V-shaped structure, and the large mouth end of the inverted V-shaped structure is downward and is in butt joint with the large mouth end of the bell mouth shape.
Further, the locking assembly includes: the shell is provided with a mounting hole, and the locking nut is fixedly arranged in the mounting hole in a penetrating manner; the locking screw rod is arranged in the locking nut in a penetrating way and connected with the slips, and the locking screw rod is in threaded fit with the locking nut so as to drive and lock the slips.
Further, one end of the locking screw extending into the inner cavity is provided with a boss with an enlarged diameter, the slips are provided with accommodating grooves, the boss extends into the accommodating grooves, the wellhead-type continuous pipe hanger further comprises a fixing block, and the fixing block is covered at an opening of the accommodating grooves and prevents the boss from exiting the accommodating grooves.
Further, the mounting hole is a stepped hole, the wellhead-type continuous pipe hanger further comprises a sealing gasket, the sealing gasket is sleeved on the outer side of the locking screw, and two ends of the sealing gasket are respectively abutted with the step of the stepped hole and the locking nut.
Further, the installation hole is obliquely formed, the axis of the installation hole and the axis of the wellhead-shaped continuous pipe hanger form a first included angle, the horn-shaped inclined plane and the axis of the wellhead-shaped continuous pipe hanger form a second included angle, and the first included angle is equal to the second included angle.
Further, the lock screw is in smooth engagement with the lock nut proximate the section of the slip and the lock screw is in threaded engagement with the lock nut distal from the section of the slip.
Further, the locking components are multiple and are arranged in one-to-one correspondence with the slips.
Further, the wellhead coiled tubing hanger further comprises: the sealing piece is arranged at the bottom end of the slip, and when the slip clamps the continuous pipe, two sides of the sealing piece are respectively in sealing abutting joint with the bell-mouth-shaped inclined plane and the continuous pipe; the support blocks are arranged below the sealing piece and connected with the slips, the slips and the support blocks clamp and fix the sealing piece, the number of the support blocks is multiple, and when the slips clamp the continuous pipe, the support blocks are mutually attached to form a support base and clamp the continuous pipe.
Further, when all slips clamp the coiled tubing together, the coiled tubing is formed into a complete ring, and the coiled tubing is clamped within the ring.
Further, the shell comprises a top cover and a bottom shell, the top cover and the bottom shell are in butt joint to form an inner cavity, and the upper part of the top cover and the lower part of the bottom shell are both provided with connecting structures connected with an external part.
According to another aspect of the present invention, there is provided a wellhead-type coiled tubing hanging process, employing the wellhead-type coiled tubing hanger described above, comprising: step S1: the wellhead continuous pipe hanger is arranged on the main wellhead valve; step S2: starting a wellhead type continuous pipe hanger after the continuous pipe is lowered to the designed depth, and hanging the continuous pipe at a wellhead through the wellhead type continuous pipe hanger; step S3: cutting off the coiled tubing and removing the operation wellhead above the wellhead-type coiled tubing hanger; step S4: mounting a christmas tree or a gas production tree on the upper part of the wellhead-type continuous pipe hanger; step S5: the ground pressing pump pumps out a temporary plug arranged at the lower end of the continuous pipe and then puts into production.
Further, in step S1, the wellhead main valve is closed, the wellhead coiled tubing hanger is installed at the upper portion of the wellhead main valve, the locking screw of the wellhead coiled tubing hanger is rotated to adjust the slips to the uppermost portion of the inner cavity, the free end of the coiled tubing is connected with the well tool and placed in the wellhead coiled tubing hanger and the lubricator, and the operation wellhead is connected.
Further, in step S2, the main valve of the wellhead is opened, after the coiled tubing and the tool for running down the well are pressed down to the designed depth under the pressure, the locking screw of the hanger of the wellhead type coiled tubing is rotated, the slips are adjusted to the lowest part of the inner cavity, the slips clamp and bite the outer wall of the coiled tubing together, the coiled tubing is slowly lowered, the weight of the injected tubing on the injection head is gradually transferred to the slips and the coiled tubing is suspended, meanwhile, the supporting blocks are mutually attached to form a supporting base, the sealing element is further compressed by the weight of the coiled tubing to expand radially, and the annular space of the coiled tubing and the wellhead below the sealing element is sealed.
Further, in step S3, after the wellhead above the wellhead-type coiled tubing hanger is depressurized, the coiled tubing is sheared by using a shearing plate of the four-ram blowout preventer, and the wellhead is removed from the wellhead above the wellhead-type coiled tubing hanger.
By adopting the technical scheme of the invention, the inner cavity is arranged in the bell mouth shape, the slips are movably arranged in the inner cavity, the movement of the slips is controlled by the locking assembly, the opening and the cohesion of each slip are realized, and further, the continuous pipe is clamped, snapped and released, on one hand, the slips are preset in the inside of the wellhead type continuous pipe hanger in advance, the inconvenience and the cost that the slips can be put in only by additionally using the operation window in a matched mode are avoided, on the other hand, repeated hanging and sealing of the continuous pipe can be realized, and the adaptability and the convenience for lifting the continuous pipe by pressing the continuous pipe due to unexpected situations during or after hanging are enhanced. The setting mode does not need to be additionally matched with a large-diameter special blowout preventer and a pump truck, the matched operation process is simple, the hydraulic well completion device is suitable for pressurized operation, the rapid operation of continuous pipe well completion and the matched lowering of diversified well completion tools can be realized, and the comprehensive operation cost of pressurized throwing of large-size continuous pipes and well completion tools is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic view of the wellhead coiled tubing hanger of the present invention in configuration upon release of the coiled tubing;
FIG. 2 shows a schematic view of the wellhead coiled tubing hanger of FIG. 1 in gripping a coiled tubing;
FIG. 3 shows a schematic structural diagram of the wellhead coiled tubing hanging process of the present invention as it proceeds to step S1;
fig. 4 shows a schematic structural diagram of the wellhead coiled tubing hanging process of the present invention when step S2 is performed.
Wherein the above figures include the following reference numerals:
10. a housing; 11. a top cover; 12. a bottom case; 20. a slip; 30. a locking assembly; 31. a lock nut; 32. locking the screw rod; 40. a fixed block; 50. a sealing gasket; 60. a seal; 70. a support block; 80. a continuous tube; 90. a main valve of a wellhead; 100. an injection head; 110. four ram blowout preventers.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.
The invention provides a wellhead type continuous pipe hanger and a hanging process, which aim to solve the problems of complicated field operation and high operation cost of a large-size continuous pipe completion well in the prior art.
A wellhead coiled tubing hanger as shown in fig. 1 and 2, comprising a housing 10, a plurality of slips 20 and a locking assembly 30, the housing 10 having an inner cavity with a flare shape, a coiled tubing 80 being penetratable within the inner cavity; the slips 20 are movably arranged in the inner cavity and are abutted against the bell-mouthed inclined surfaces, and each slip 20 can move along the bell-mouthed inclined surfaces in the directions approaching each other to clamp the continuous pipe 80 or move in the directions moving away from each other to release the continuous pipe 80; the locking assembly 30 extends into the interior cavity and is coupled to the slips 20, the locking assembly 30 is capable of driving the slips 20 into motion to pinch or release the coiled tubing 80, and the locking assembly 30 is capable of locking the slips 20 in position.
According to the embodiment, the inner cavity is arranged to be in a horn shape, the slips 20 are movably arranged in the inner cavity, the movement of the slips 20 is controlled through the locking assembly 30, the opening and the cohesion of each slip 20 are realized, and further, the continuous pipe 80 is clamped, snapped and released, on one hand, the slips 20 are preset in the inside of the wellhead continuous pipe hanger in advance, the inconvenience and the cost that the slips 20 can be put in only by using an operation window in an additional matching mode are avoided, on the other hand, repeated hanging and sealing of the continuous pipe 80 can be realized, and the adaptability and the convenience for lifting the continuous pipe 80 by the belt under the accident condition during operation or after hanging are enhanced. The setting mode does not need to be additionally matched with a large-diameter special blowout preventer and a pump truck, the matched operation process is simple, the hydraulic well completion device is suitable for pressurized operation, the rapid operation of continuous pipe well completion and the matched lowering of diversified well completion tools can be realized, and the comprehensive operation cost of pressurized throwing of large-size continuous pipes and well completion tools is reduced.
The wellhead-type coiled tubing hanger according to the present embodiment is mainly directed to a coiled tubing with a large diameter and a large size, and of course, a coiled tubing with a small size may be used as needed.
In this embodiment, the large mouth end of the bell mouth is upward, and the small mouth end is downward, so that when the slips 20 move upward along the conical inclined plane of the bell mouth, they can be separated from each other, thereby releasing the coiled tubing 80, and the operations such as inserting the coiled tubing 80 can be performed, and when the slips 20 move downward along the conical inclined plane of the bell mouth, they can approach each other, thereby clamping and gripping the coiled tubing 80, and realizing the clamping of the coiled tubing 80. Besides the conical inclined plane in the shape of a horn, the inner cavity is also provided with an inverted V-shaped structure arranged above the horn, the large mouth end of the inverted V-shaped structure is downward and is in butt joint with the large mouth end in the shape of the horn, and the inclined plane of the inverted V-shaped structure is mutually perpendicular to the inclined plane in the shape of the horn. Correspondingly, the upper part and the lower part of the outer side surface of the slip 20 are arc conical surfaces and are respectively matched with the bevel of the bell mouth shape and the bevel of the inverted V-shaped structure, when the slip 20 moves upwards, the bevel of the upper side of the slip 20 is propped against the bevel of the inverted V-shaped structure, and when the slip 20 moves downwards, the bevel of the lower side of the slip 20 moves along the bevel of the bell mouth shape. Of course, the particular shape of the inner wall of the lumen and between the slips 20 may be other shapes as desired, provided that the slips 20 are capable of being moved up and down to grip or release the coiled tubing 80.
The locking assembly 30 of the embodiment comprises a locking nut 31 and a locking screw 32, the shell 10 is provided with a mounting hole, the mounting hole is communicated with the inner cavity and the outside, and the locking nut 31 is fixedly arranged in the mounting hole in a penetrating manner; the locking screw rod 32 is arranged in the locking nut 31 in a penetrating way and is connected with the slips 20, the locking screw rod 32 is in threaded fit with the locking nut 31, the slips 20 can be driven to move by rotating the locking screw rod 32, and when the locking screw rod 32 is not rotated, self-locking or external equipment can lock the locking screw rod 32 by the threaded fit of the locking screw rod 32 and the locking nut 31, so that the positions of the slips 20 are locked.
In this embodiment, the end of the locking screw 32 extending into the inner cavity is provided with a boss with an enlarged diameter, the upper side surface of the slip 20 is provided with a holding groove, the boss extends into the holding groove, the groove depth of the holding groove is greater than the thickness of the boss by 5-10mm, the wellhead-type coiled tubing hanger further comprises a fixing block 40, the whole appearance of the fixing block 40 is in a columnar structure, the locking screw 32 is arranged in the fixing block in a penetrating manner, the upper end surface of the fixing block is provided with a plurality of axial small through holes and uniformly distributed along the circumferential direction, the fixing block 40 covers the opening of the holding groove and is fixedly connected with the slip 20 through parts such as screws, so that the boss is prevented from exiting the holding groove, and the locking screw 32 drives the slip 20 to move together.
Preferably, the mounting hole of this embodiment is a stepped hole, and the wellhead-type coiled tubing hanger further comprises a sealing gasket 50, and this embodiment adopts a compression-type sealing gasket 50, and the sealing gasket 50 is sleeved outside the locking screw 32, and two ends respectively abut against the step of the stepped hole and the locking nut 31, and the circumferential outer surface of the sealing gasket 50 forms a sealing fit with the smooth inner surface of the stepped hole, so that the sealing of the stepped hole is realized, and the sealing effect is ensured.
Optionally, since the inverted V-shaped structure is disposed on the upper portion of the inner cavity of the present embodiment, the mounting hole of the present embodiment is formed at a shoulder of the inverted V-shaped structure and is formed obliquely, the axis of the mounting hole and the axis of the wellhead-shaped coiled tubing hanger form a first angle, the flared inclined plane and the axis of the wellhead-shaped coiled tubing hanger form a second angle, and the first angle is equal to the second angle, that is, the axis of the mounting hole is parallel to the flared inclined plane at the corresponding position and is perpendicular to the inclined plane of the inverted V-shaped structure at the corresponding position. Thus, the locking screw 32, when moved along the axis of the mounting hole, moves the slips 20 along the flared incline. The locking screw 32 adopts a structure and a layout design inclined by a certain angle, so that on one hand, the mutual interference of parts caused by vertical or horizontal arrangement or single function is avoided, the overall structure and the size of the hanger are skillfully simplified, and on the other hand, the combination of the slips 20, the sealing rubber and the supporting blocks 70 can precisely move along the straight line of the bell-mouthed conical surface on the shell 10, and the accuracy of the action and the reliability and the effectiveness of the hanging when the continuous pipe 80 is held are ensured.
In this embodiment, the segments of the locking screw 32 proximal to the slips 20 are in smooth engagement with the locking nut 31 and the segments of the locking screw 32 distal to the slips 20 are in threaded engagement with the locking nut 31.
Specifically, the locking screw 32 of this embodiment is sequentially an external hexagonal wrench groove, an external threaded screw, a smooth sealing section and a boss from top to bottom, the external threaded screw is screwed with the internal thread of the locking nut 31, the smooth sealing section passes through the through hole of the sealing gasket 50 and is in sealing fit with the sealing gasket 50, and the boss is installed in the receiving groove of the slip 20 through the limiting action of the fixing block 40. The upper part of the outer surface of the lock nut 31 is an external hexagonal wrench groove, the middle lower part of the outer surface is sequentially provided with an external thread matched with the mounting hole and a smooth cylindrical surface matched with the mounting hole from top to bottom, and the bottom end surface is abutted against the upper end surface of the sealing gasket 50. The lock nut 31 has a stepped through hole structure, the diameter of the upper through hole is smaller and is provided with an internal thread screwed with the lock screw 32, and the side wall of the lower through hole is a smooth cylindrical surface. Thus, the sealing effect is ensured while the locking screw 32, the locking nut 31 and the mounting hole are matched.
Optionally, the locking assemblies 30 in this embodiment are multiple and are disposed in one-to-one correspondence with the slips 20, and correspondingly, the same number of mounting holes are also formed and correspondingly formed.
In this embodiment, the wellhead coiled tubing hanger further comprises a sealing member 60 and a supporting block 70, wherein the sealing member 60 is made of sealing rubber, and is arranged at the bottom end of the slips 20, and when the slips 20 clamp the coiled tubing 80, two sides of the sealing member 60 are respectively in sealing abutting connection with the bell-mouthed inclined plane and the coiled tubing 80; the support block 70 is disposed below the sealing member 60 and is connected to the slips 20 by means of support screws or the like, and the sealing member 60 is clamped between the slips 20 and the support block 70, so that the sealing member 60 can be clamped and fixed by the slips 20 and the support block 70. Since the plurality of slips 20 are provided in this embodiment, the plurality of support blocks 70 are also provided and are arranged in one-to-one correspondence with the slips 20, and when the slips 20 clamp the coiled tubing 80, the support blocks 70 are mutually attached to form a support base and clamp the coiled tubing 80.
Specifically, the slips 20 are of multi-petal structure, when the slips 20 are mutually attached, a complete cone can be formed, namely, when all the slips 20 clamp the continuous pipe 80 together, a complete ring is formed, the continuous pipe 80 is clamped in the ring, the number of slips 20 is the same as that of the locking screws 32, and the inner surface of each slip 20 is provided with dies which are arc surfaces and are matched with the pipe diameter of the continuous pipe 80; the sealing rubber is also of a multi-petal structure, the quantity of the sealing rubber is the same as that of the slips 20, the upper end surface and the lower end surface of the sealing rubber are respectively abutted against the slips 20 and the supporting blocks 70, the outer surface of the sealing rubber is an arc conical surface, the conical degree is the same as that of the bell mouth and is contacted with the bell mouth, the maximum and minimum arc radiuses of the sealing rubber are respectively the same as that of the minimum arc of the conical surface of the slips 20 and the maximum arc radius of the supporting blocks 70, when the multi-petal sealing rubber is mutually bonded, a complete cone with a seamless bonding surface can be formed, and meanwhile, the continuous pipe 80 is held, so that the sealing between the continuous pipe 80 and a wellhead annulus can be realized; the supporting blocks 70 are of multi-petal structures, the number of the supporting blocks is the same as that of the slips 20, the upper end faces of the supporting blocks are in contact with the sealing rubber, a plurality of stepped countersunk through holes, the number and positions of which correspond to those of the axial through holes in the sealing rubber, are formed in the lower end faces of the supporting blocks 70, the depth of the countersunk through holes is 5-10mm larger than that of nuts of the supporting screws, so that the supporting screws which follow up the supporting screws when the sealing rubber is compressed are prevented from exposing out of the lower end faces of the supporting screws to interfere other parts, and the supporting screws penetrate through the countersunk through holes from bottom to top and the corresponding through holes in the sealing rubber and the slips 20 to fix the countersunk through holes, and the maximum arc radius of the supporting blocks 70 is required to be larger than the nominal diameter of the shell 10. The multi-flap type structure solves the problems that the inner diameter of the sealing rubber cylinder is required to be consistent with the outer diameter of the continuous pipe 80 by using the conventional integral sealing rubber cylinder, and tools with diameters larger than the diameter of the continuous pipe 80 cannot pass through, and the multi-flap type sealing rubber is compressed by skillfully applying the weight of the continuous pipe 80 to mutually attach and seal the continuous pipe 80 and a wellhead annulus, so that the purpose of effective sealing under high pressure is achieved, and the integral structure is simple and effective.
The shell 10 of this embodiment adopts the combination formula structure, it includes top cap 11 and drain pan 12, the lower part of top cap 11 is provided with the structure of falling V-arrangement, and effective interior through-hole diameter corresponds with the nominal interior through-hole size of standard flange, interior latus rectum is unanimous with the 90 nominal diameter of well head main valve, the upper portion of drain pan 12 is provided with the horn mouth shape, the upper portion of drain pan 12 can stretch into in the lower part of top cap 11, can form the inner chamber jointly when the two dock, the mounting hole is offered promptly in the structure department of falling V-arrangement of top cap 11. The upper portion lateral surface of drain pan 12 is provided with the external screw thread, and the bottom medial surface of top cap 11 is provided with the internal screw thread, closes soon between the internal screw thread and can link together between top cap 11 and the drain pan 12 to can be provided with the sealing washer in the junction of two, seal through the sealing washer, can also set up limit structures such as spacing step in the junction. The upper part of the top cover 11 and the lower part of the bottom shell 12 are respectively provided with a connecting structure connected with an external part, and the connecting structure can be set into a standard flange or a wire-carrying flange structure according to requirements. Thus, a combined structure is adopted, a larger cavity can be generated so as to accommodate the combination of the slips 20, the sealing rubber and the supporting blocks 70, the presetting of the hanging and sealing combination is realized, the structure and the work are not associated with the connecting flange, enough space is reserved for the main diameters of the upper flange and the lower flange, the large-diameter tool and the continuous pipe 80 are not interfered to pass through, the corresponding flange under the structural design of the large-diameter tool can be selected and processed according to the standard of the oil gas wellhead flange, and the problems that the size of the connecting flange is oversized and the connecting flange can be connected with the existing standard wellhead only by adopting the non-standard flange under the functional design of pursuing the larger main diameter and giving attention to the slips 20 and the like in the past are avoided.
During assembly, the upper end of the locking screw 32 is inserted into the central through hole of the fixed block 40, the boss at the lower end of the locking screw 32 is placed into the sinking groove on the outer shoulder of the slip 20, the screws are sequentially installed and screwed corresponding to the threaded holes on the outer shoulder of the slip 20, then the slip 20, the sealing rubber and the supporting block 70 are stacked according to the sequence and the direction from top to bottom, the supporting screws sequentially penetrate through the through holes of the supporting block 70, the sealing rubber and the lower end face of the slip 20 from bottom to top and are screwed to a natural attaching state, and the assembly of the single-petal assembly composed of the locking screw 32, the slip 20, the sealing rubber, the supporting block 70 and the like is completed by repeating the actions. The single-petal combination body combined by the above is put into the inner cavity of the top cover 11 from the lower part of the top cover 11, the die of the slips 20 is adjusted to face the central axis of the top cover 11, then the upper end of the locking screw rod 32 penetrates out from the lower part of the mounting hole on the shoulder of the top cover 11, the sealing gasket 50 is sleeved from the locking screw rod 32 and is abutted against the step of the mounting hole, the lower end of the locking nut 31 is sleeved from the top of the locking screw rod 32, the connecting threads of the locking nut 31, the locking screw rod 32 and the top cover 11 are sequentially screwed until the sealing gasket 50 is compressed and the slips 20 are in a fully opened state, and the installation and the fixation of each locking screw rod 32 on the top cover 11 are completed by repeating the above actions. Finally, the upper part of the bottom shell 12 is inserted into the lower cavity of the top cover 11, and the connecting threads are screwed down, so that the assembly of the wellhead-type continuous pipe hanger is completed.
The embodiment also provides a wellhead-type continuous pipe hanging process, which adopts the wellhead-type continuous pipe hanger and comprises the following steps: step S1: the wellhead coiled tubing hanger is mounted above the wellhead main valve 90; step S2: after the coiled tubing 80 is lowered to the designed depth, starting a wellhead-type coiled tubing hanger, and hanging the coiled tubing 80 at a wellhead through the wellhead-type coiled tubing hanger; step S3: cutting the coiled tubing 80 and removing the wellhead above the wellhead coiled tubing hanger; step S4: mounting a christmas tree or a gas production tree on the upper part of the wellhead-type continuous pipe hanger; step S5: the ground pressing pump pumps out the temporary plug arranged at the lower end of the continuous pipe 80 and then puts into production.
Specifically, as shown in fig. 3 and 4, in step S1, the wellhead main valve 90 is closed, a wellhead coiled tubing hanger is installed at the upper portion of the wellhead main valve 90, the locking screw 32 of the wellhead coiled tubing hanger is rotated to adjust the slips 20 to the uppermost portion of the inner cavity, and the free end of the coiled tubing 80 is connected to a tool for running a well and placed in the wellhead coiled tubing hanger and lubricator, and the work wellhead is connected. In step S2, the main wellhead valve 90 is opened, the coiled tubing 80 and the tool for running down the well are driven down to the designed depth under pressure, the locking screw 32 of the hanger for the coiled tubing of the wellhead is rotated, the slips 20 are adjusted to the lowest part of the inner cavity, the slips 20 clamp the outer wall of the coiled tubing 80 together, the coiled tubing 80 is slowly lowered, the weight of the pipe on the injection head 100 is gradually transferred to the slips 20 and the coiled tubing 80 is suspended, meanwhile, the supporting blocks 70 are mutually attached to form a supporting base, the sealing element 60 is further compressed by the weight of the coiled tubing 80 to expand radially, and the annular space of the coiled tubing 80 and the wellhead below the sealing element 60 is sealed. In step S3, after the wellhead above the wellhead-string hanger is depressurized, the coiled tubing 80 is sheared using the shear-plate of the four-ram blowout preventer 110, and the wellhead above the wellhead-string hanger is removed. In step S5, the nitrogen vehicle flow pipeline is connected with the wellhead paraffin removal gate valve, the nitrogen vehicle is pumped to pump the temporary plug preset before the lower end of the continuous pipe 80 is lowered, the continuous pipe 80 is communicated with the shaft, and subsequent operation or production can be directly performed.
In the embodiment, due to the adoption of the integrated hanger and the process with the functions of large-diameter and preset hanging and sealing combination, the continuous pipe 80 is only required to be connected with a conventional operation wellhead device during site construction, and a special blowout preventer with an internal diameter of 130mm or more and an operation window matched with the slip 20 are not required to be put in, so that the operation wellhead device is simplified, the matched cost of construction hardware is reduced, the problem that the labor intensity of disassembling and assembling the wellhead is high when the weight of a changeover pipe column is temporarily hung by the special blowout preventer with the large diameter is avoided, and the problem that the risk of long-time operation under pressure of personnel is increased at the wellhead is solved, the operation is facilitated to speed up and efficiency, the matched feeding tool and the pump truck are not required to be matched during construction, and the added cost of equipment can be further saved.
It should be noted that, in the above embodiments, a plurality refers to at least two.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. the problems of complicated field operation and high operation cost of a large-size continuous pipe completion well in the prior art are solved;
2. the slips are preset in the wellhead-type continuous pipe hanger in advance, so that the inconvenience and cost that the slips can be put in only by additionally matching an operating window in the follow-up process are avoided;
3. repeated suspension and sealing of the continuous pipe can be realized, and the adaptability and convenience of lifting the continuous pipe by the belt under the unexpected condition during operation or after suspension are enhanced;
4. the method does not need to be additionally matched with a blowout preventer and a pump truck special for large drift diameter, has simple matched operation process, is suitable for pressurized operation, can realize rapid operation of continuous pipe completion and matched lowering of diversified completion tools, and reduces the comprehensive operation cost of pressurized throwing of large-size continuous pipes and completion tools.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A wellhead coiled tubing hanger, comprising:
a housing (10), the housing (10) having an inner cavity with a flare shape, a coiled tubing (80) being penetratable within the inner cavity;
a plurality of slips (20), the slips (20) being movably disposed within the internal cavity and abutting the flared ramp, each slip (20) being movable along the flared ramp in a direction toward each other to grip the coiled tubing (80) or in a direction away from each other to release the coiled tubing (80);
a locking assembly (30), the locking assembly (30) extending into the interior cavity and being connected to the slips (20), the locking assembly (30) being capable of driving the slips (20) in motion to grip or release the coiled tubing (80), and the locking assembly (30) being capable of locking the position of the slips (20);
the large mouth end of the bell-mouth shape is upward, the inner cavity is also provided with an inverted V-shaped structure, and the large mouth end of the inverted V-shaped structure is downward and is in butt joint with the large mouth end of the bell-mouth shape;
the locking assembly (30) includes:
the shell (10) is provided with a mounting hole, and the locking nut (31) is fixedly arranged in the mounting hole in a penetrating manner;
the locking screw rod (32) is penetrated in the locking nut (31) and connected with the slip (20), and the locking screw rod (32) is in threaded fit with the locking nut (31) so as to drive and lock the slip (20);
the installation hole is obliquely formed, a first included angle is formed between the axis of the installation hole and the axis of the wellhead-shaped continuous pipe hanger, a second included angle is formed between the horn-shaped inclined plane and the axis of the wellhead-shaped continuous pipe hanger, and the first included angle is equal to the second included angle;
the wellhead coiled tubing hanger further comprises:
the sealing piece (60) is arranged at the bottom end of the slip (20), and when the slip (20) clamps the continuous pipe (80), two sides of the sealing piece (60) are respectively in sealing abutting joint with the bell-mouth-shaped inclined plane and the continuous pipe (80);
the support blocks (70), the support blocks (70) are arranged below the sealing piece (60) and are connected with the slips (20), the slips (20) and the support blocks (70) clamp and fix the sealing piece (60), the support blocks (70) are multiple, and when the slips (20) clamp the continuous pipe (80), the support blocks (70) are mutually attached to form a support base and clamp the continuous pipe (80).
2. The wellhead-type coiled tubing hanger of claim 1, wherein an end of the locking screw (32) extending into the inner cavity has an enlarged diameter boss, the slips (20) are provided with receiving grooves, the boss extends into the receiving grooves, the wellhead-type coiled tubing hanger further comprises a fixed block (40), and the fixed block (40) covers an opening of the receiving grooves and prevents the boss from exiting the receiving grooves.
3. The wellhead-type coiled tubing hanger according to claim 1, wherein the mounting hole is a stepped hole, the wellhead-type coiled tubing hanger further comprises a sealing gasket (50), the sealing gasket (50) is sleeved outside the locking screw (32), and two ends of the sealing gasket are respectively abutted with the step of the stepped hole and the locking nut (31).
4. The wellhead coiled tubing hanger of claim 1, wherein a section of the locking screw (32) proximal to the slips (20) is in smooth engagement with the locking nut (31), and a section of the locking screw (32) distal to the slips (20) is in threaded engagement with the locking nut (31).
5. The wellhead coiled tubing hanger of claim 1, wherein the locking assemblies (30) are a plurality and are disposed in one-to-one correspondence with the slips (20).
6. The wellhead coiled tubing hanger of claim 1, wherein all of the slips (20) form a complete annulus when collectively gripping the coiled tubing (80), the coiled tubing (80) being gripped within the annulus.
7. Wellhead coiled tubing hanger according to claim 1, characterized in that the housing (10) comprises a top cover (11) and a bottom shell (12), the top cover (11) and the bottom shell (12) being butted together to form the inner cavity, the upper part of the top cover (11) and the lower part of the bottom shell (12) each having a connection structure to an external piece.
8. A wellhead coiled tubing hanging process employing the wellhead coiled tubing hanger of any of claims 1 to 7, comprising:
step S1: the wellhead coiled tubing hanger is arranged on a main wellhead valve (90);
step S2: starting the wellhead-type continuous pipe hanger after the continuous pipe (80) is lowered to the designed depth, and hanging the continuous pipe (80) at a wellhead through the wellhead-type continuous pipe hanger;
step S3: cutting the coiled tubing (80) and removing the work wellhead above the wellhead coiled tubing hanger;
step S4: mounting a christmas tree or a gas production tree on the upper part of the wellhead-type continuous pipe hanger;
step S5: and pumping out the temporary plug arranged at the lower end of the continuous pipe (80) by the ground pressing pump, and then putting into production.
9. The wellhead coiled tubing hanging process according to claim 8, wherein in the step S1, the wellhead main valve (90) is closed, the wellhead coiled tubing hanger is installed at the upper portion of the wellhead main valve (90), the locking screw (32) of the wellhead coiled tubing hanger is rotated to adjust the slips (20) to the uppermost portion of the inner cavity, the free end of the coiled tubing (80) is connected with a well tool and placed in the wellhead coiled tubing hanger and lubricator, and the operation wellhead is connected.
10. The wellhead coiled tubing hanging process according to claim 8, wherein in the step S2, after the wellhead main valve (90) is opened and the coiled tubing (80) and the tool are lowered to a designed depth, the locking screw (32) of the wellhead coiled tubing hanger is rotated, the slips (20) are adjusted to the lowest part of the inner cavity, the slips (20) clamp the outer wall of the coiled tubing (80) together, the coiled tubing (80) is slowly lowered, the weight of the tubing on the injection head (100) is gradually transferred onto the slips (20) and the coiled tubing (80) is hung, the supporting blocks (70) are mutually attached to form a supporting base, and the sealing element (60) is further compressed by the weight of the coiled tubing (80) to radially expand to seal the wellhead annulus below the sealing element (60).
11. The wellhead coiled tubing hanging process according to claim 8, wherein in the step S3, after depressurizing the wellhead above the wellhead coiled tubing hanger, the coiled tubing (80) is sheared using a shearing plate of a four ram blowout preventer (110), and the wellhead is removed from the wellhead above the wellhead coiled tubing hanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110189548.5A CN114961610B (en) | 2021-02-19 | 2021-02-19 | Wellhead type coiled tubing hanger and hanging process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110189548.5A CN114961610B (en) | 2021-02-19 | 2021-02-19 | Wellhead type coiled tubing hanger and hanging process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114961610A CN114961610A (en) | 2022-08-30 |
| CN114961610B true CN114961610B (en) | 2024-03-01 |
Family
ID=82954761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110189548.5A Active CN114961610B (en) | 2021-02-19 | 2021-02-19 | Wellhead type coiled tubing hanger and hanging process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114961610B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961609B (en) * | 2021-02-19 | 2024-03-01 | 中国石油天然气集团有限公司 | Wellhead hanging sealing device and wellhead hanging sealing well completion process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB874065A (en) * | 1959-05-04 | 1961-08-02 | Shell Int Research | Apparatus for suspending pipe strings within a well |
| US5515925A (en) * | 1994-09-19 | 1996-05-14 | Boychuk; Randy J. | Apparatus and method for installing coiled tubing in a well |
| WO2013158030A1 (en) * | 2012-04-18 | 2013-10-24 | Aker Solutions Pte Ltd | A casing hanger |
| CN105275417A (en) * | 2015-05-19 | 2016-01-27 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for running in and out coiled tubing production string |
| CN107740683A (en) * | 2017-11-17 | 2018-02-27 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of electric submersible pump mining device for adapting to coiled tubing completion |
| CN211448599U (en) * | 2019-10-12 | 2020-09-08 | 中国石油天然气集团有限公司 | Slip type hanger and continuous pipe completion pipe string mounting structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG11201602574QA (en) * | 2013-10-01 | 2016-05-30 | Nabors Corporate Services | Automated pipe slips |
-
2021
- 2021-02-19 CN CN202110189548.5A patent/CN114961610B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB874065A (en) * | 1959-05-04 | 1961-08-02 | Shell Int Research | Apparatus for suspending pipe strings within a well |
| US5515925A (en) * | 1994-09-19 | 1996-05-14 | Boychuk; Randy J. | Apparatus and method for installing coiled tubing in a well |
| WO2013158030A1 (en) * | 2012-04-18 | 2013-10-24 | Aker Solutions Pte Ltd | A casing hanger |
| CN105275417A (en) * | 2015-05-19 | 2016-01-27 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for running in and out coiled tubing production string |
| CN107740683A (en) * | 2017-11-17 | 2018-02-27 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of electric submersible pump mining device for adapting to coiled tubing completion |
| CN211448599U (en) * | 2019-10-12 | 2020-09-08 | 中国石油天然气集团有限公司 | Slip type hanger and continuous pipe completion pipe string mounting structure |
Non-Patent Citations (1)
| Title |
|---|
| 连续油管排水采气工艺技术在苏东41一33区块的应用;张春等;《长江大学学报（自然科学版）理工》;第9卷(第8期);第97-99页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114961610A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7584798B2 (en) | Subsurface lubricator and method of use | |
| CA2434801C (en) | Adapters for double-locking casing mandrel and method of using same | |
| US4691790A (en) | Method and apparatus for removing the inner conduit from a dual passage drill string | |
| RU2413837C2 (en) | Procedure for maintaining pressure in borehole of well (versions) and device for its implementation | |
| CN105658902A (en) | Running tool | |
| CN107740683B (en) | Electric submersible pump drainage device suitable for coiled tubing completion | |
| BRPI0903049A2 (en) | recoverable offshore drilling protector | |
| US3675719A (en) | Tubing hanger assembly and method of using same | |
| US2715441A (en) | Bridging plug | |
| CN101864923B (en) | Split type anchor suspension packer | |
| CA2335677C (en) | Seal assembly for dual string coil tubing injection and method of use | |
| US5605194A (en) | Independent screwed wellhead with high pressure capability and method | |
| US3341227A (en) | Casing hanger | |
| CN114961610B (en) | Wellhead type coiled tubing hanger and hanging process | |
| US2927643A (en) | Tubing | |
| CN211448599U (en) | Slip type hanger and continuous pipe completion pipe string mounting structure | |
| US10322912B2 (en) | Connector system | |
| US7832480B1 (en) | Apparatus and method for extracting a tubular string from a bore hole | |
| CN113494259B (en) | Coiled tubing suspension device, coiled tubing wellhead mandrel type suspension structure and method | |
| US7520334B2 (en) | Subsurface lubricator and method of use | |
| CN114901918B (en) | Top blanking plug fixing system | |
| CN114961609B (en) | Wellhead hanging sealing device and wellhead hanging sealing well completion process | |
| GB2309469A (en) | Installation and retrieval of a wellhead load shoulder | |
| CN114458226B (en) | Hydraulic pipeline setting type cable passing packer and well completion pipe string using same | |
| RU164217U1 (en) | PACKER WITH CABLE INPUT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20221230 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Applicant after: CNPC JIANGHAN MACHINERY RESEARCH INSTITUTE Co.,Ltd. Applicant after: BEIJING PETROLEUM MACHINERY Co.,Ltd. Address before: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant before: CHINA NATIONAL PETROLEUM Corp. Applicant before: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Applicant before: CNPC JIANGHAN MACHINERY RESEARCH INSTITUTE Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |