CN108060907B - Single-ball type hydraulic liner hanger - Google Patents
Single-ball type hydraulic liner hanger Download PDFInfo
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- CN108060907B CN108060907B CN201711254018.4A CN201711254018A CN108060907B CN 108060907 B CN108060907 B CN 108060907B CN 201711254018 A CN201711254018 A CN 201711254018A CN 108060907 B CN108060907 B CN 108060907B
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- 230000007246 mechanism Effects 0.000 claims abstract description 121
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 238000012856 packing Methods 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 17
- 238000012546 transfer Methods 0.000 claims description 12
- 230000004323 axial length Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 18
- 239000012530 fluid Substances 0.000 description 9
- 238000005553 drilling Methods 0.000 description 8
- 238000010008 shearing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Fluid-Damping Devices (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a single-ball type hydraulic tail pipe hanger which comprises an outer sleeve, at least two sitting and hanging mechanisms and a packing mechanism which are arranged on the outer wall of the outer sleeve, a plurality of hydraulic transmission mechanisms which are respectively arranged below each sitting and hanging mechanism and above and below the packing mechanism, and a first ball-throwing pressure-holding mechanism and a second ball-throwing pressure-holding mechanism which are arranged on the inner side of the outer sleeve; a plurality of pressure transmission hole groups which are respectively communicated with the inner cavity of the hydraulic cylinder of each hydraulic transmission mechanism are arranged on the side wall of the outer sleeve, so that the sitting and hanging mechanism and the packing mechanism are sitting and hanging or packed on the well wall under the hydraulic action; the first ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve positioned between the sitting and hanging mechanism and the packing mechanism, and the second ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve positioned below the packing mechanism; the device can utilize two bowling suppressing pressure mechanism to avoid sitting and hanging and seal the appearance of untimely or improper opportunity problem of opportunity, effectively promotes to sit and hangs the effect and guarantees to sit the success rate of hanging and effectively seal.
Description
Technical Field
The invention relates to the technical field of tail pipe suspension well cementation of oil and gas wells, in particular to a single-ball type hydraulic tail pipe hanger.
Background
In tail pipe suspension well cementation operations of deep wells, directional wells, horizontal wells and the like of oil and gas wells, a tail pipe well cementation method is mostly adopted for well cementation operations in order to save a large amount of casing pipes and cement. At present, the problems that a liner hanger is not hung or can not be effectively hung after being lowered to a setting position are often encountered in the liner hanging and well cementing operation process; or the slips are damaged due to collision or improper operation in the process of descending the hanger, so that the problem of influence on sitting and hanging is solved, and further the operation is unsuccessful. Therefore, there is a need for an improved tail pipe hanger structure that solves the above problems.
Disclosure of Invention
The invention aims to provide a single-ball type hydraulic liner hanger capable of improving the sitting and hanging effect and the success rate.
Therefore, the technical scheme of the invention is as follows:
a single-ball type hydraulic tail pipe hanger comprises an outer sleeve 1, at least two sitting and hanging mechanisms, a packing mechanism, a plurality of hydraulic transmission mechanisms, a first ball-throwing pressure-holding mechanism and a second ball-throwing pressure-holding mechanism, wherein the first ball-throwing pressure-holding mechanism and the second ball-throwing pressure-holding mechanism are arranged on the inner side of the outer sleeve 1; the sitting and hanging mechanisms are arranged on the outer wall of the upper part of the outer sleeve 1, and a hydraulic transmission mechanism is arranged below each sitting and hanging mechanism; the packing mechanism is arranged on the outer wall of the lower part of the outer sleeve 1, and a hydraulic transmission mechanism is respectively arranged above and below the packing mechanism; a plurality of pressure transmission hole groups which are respectively communicated with the inner cavity of the hydraulic cylinder of each hydraulic transmission mechanism are arranged on the side wall of the outer sleeve 1 from top to bottom, so that the sitting and hanging mechanism and the packing mechanism are hung or packed on the inner wall of the shaft under the action of the hydraulic transmission mechanisms; the first ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve positioned between the sitting and hanging mechanism and the packing mechanism, and the second ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve positioned below the packing mechanism;
further, the sitting and hanging mechanism comprises a taper sleeve and a slip; wherein, the taper sleeve is sleeved and fixed on the outer sleeve 1 on the outer wall of the outer sleeve 1 through a plurality of set screws arranged along the circumferential direction; the lower part of the taper sleeve is a tapered part with the outer diameter gradually reduced from top to bottom, and the outer wall of the tapered surface of the tapered part is provided with a plurality of slideways arranged at intervals along the circumferential direction; the slips is a barrel structure, the inner wall of the slips is a conical surface with the inner diameter gradually increasing from top to bottom, a plurality of convex strips arranged at intervals along the circumferential direction are arranged on the conical surface, and the convex strips are matched with the slide ways to enable the slips to slide up and down along the outer wall of the conical surface of the conical part.
Further, the packing mechanism comprises an upper rubber cylinder seat, a plurality of rubber cylinders and a lower rubber cylinder seat which are sequentially sleeved on the outer side of the outer sleeve 1 from top to bottom, and a spacer ring is arranged between every two adjacent rubber cylinders.
Furthermore, the hydraulic transmission mechanism comprises two hydraulic cylinders which are symmetrically arranged and fixed on the outer wall of the outer sleeve and two I-shaped pistons which are respectively arranged in each hydraulic cylinder; the I-shaped piston consists of a first cross rod arranged inside the hydraulic cylinder cavity, a second cross rod arranged outside the hydraulic cylinder cavity and a vertical rod of which two ends are respectively fixed in the middle of the first cross rod and the second cross rod; the first cross rod is adaptive to the inner diameter of the hydraulic cylinder cavity; the second cross bar is directly fixed on the rubber cylinder seat or fixed on the bottom surface of the slip through the push rod.
Furthermore, a sealing ring is arranged on the outer side of the first cross rod, so that sealing is formed between the cross rod and the inner wall of the hydraulic cylinder; a sealing ring is arranged on the wall of the through hole of the I-shaped piston, wherein the vertical rod penetrates out of the hydraulic cylinder, so that sealing is formed between the vertical rod and the wall of the through hole; at least one sealing ring is respectively arranged on the outer wall of the outer sleeve above and below each pressure transfer hole group, so that the two sides of the communication channel between the outer sleeve 1 and the hydraulic cylinder are sealed.
Further, the first ball-throwing pressure-building mechanism and the second ball-throwing pressure-building mechanism respectively comprise a setting cylinder, a ball seat and a setting ball; wherein, the setting cylinder is fixed on the outer sleeve 1 through a plurality of shear pins arranged along the circumferential direction; the ball seat is axially cut into a plurality of pieces and is hinged to the bottom end of the setting cylinder, an annular groove with the size matched with that of the ball seat is formed in the inner wall of the outer sleeve 1 below the ball seat, and the ball seat can be expanded outwards to increase the inner diameter when moving downwards to the annular groove along with the setting cylinder; the outer diameter of the setting ball is larger than the inner diameter of the ball seat and smaller than the inner diameters of the setting cylinder and the expanded ball seat.
Furthermore, a plurality of axial convex strips are arranged on the outer wall of the setting cylinder along the circumferential direction, and a plurality of guide grooves matched with the axial convex strips are arranged on the inner wall of the outer sleeve 1 along the circumferential direction, so that the axial convex strips of the setting cylinder are inserted into the guide grooves and can slide down along the guide grooves; the length of the guide groove is larger than the axial length of the setting cylinder, the guide groove is initially fixed at the uppermost part of the guide groove, and the annular groove is arranged below the guide groove.
Further, a connecting cylinder 3 is screwed on the outer wall of the top end of the outer sleeve 1.
Furthermore, the inner wall of the top end of the outer sleeve 1 is in threaded connection with a back-off connector 2, and the back-off connector 2 is positioned on the inner side of the cylinder body of the connecting cylinder 3.
Furthermore, a centralizer 34 is sleeved on the outer wall of the bottom end of the outer casing 1.
The sitting and hanging mechanism of the single-ball hydraulic liner hanger effectively improves the sitting and hanging effect and ensures the success rate of sitting and hanging under the action of the slips, the taper sleeve and the hydraulic transmission mechanism matched with the slips and the taper sleeve; meanwhile, effective packing is realized under the action of the setting mechanism and the hydraulic transmission mechanism matched with the setting mechanism; the sitting, hanging and packing functions of the device can be realized by the first ball-throwing pressure-holding mechanism and the second ball-throwing pressure-holding mechanism respectively, so that the problems of untimely sitting, hanging and packing or improper time are avoided; meanwhile, the design of the hanging mechanism can effectively protect the slips from being collided or damaged before being hung.
Drawings
FIG. 1 is a schematic structural view of a single ball hydraulic liner hanger of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 3 is a partially enlarged schematic view of portion A of FIG. 1;
fig. 4 is a partially enlarged schematic top view of a portion a of fig. 1.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, which are not intended to limit the invention in any way.
As shown in fig. 1, the single-ball hydraulic liner hanger comprises an outer sleeve 1, a left-hand thread joint 2, a tieback cylinder 3, an upper sitting hanging mechanism, a first hydraulic transmission mechanism, a lower sitting hanging mechanism, a second hydraulic transmission mechanism, a third hydraulic transmission mechanism, a packing mechanism, a fourth hydraulic transmission mechanism and a centralizer 34 which are sequentially arranged on the outer wall of the outer sleeve 1 from top to bottom, and a first ball-throwing pressure-holding mechanism and a second ball-throwing pressure-holding mechanism which are arranged on the inner wall of the outer sleeve 1 from top to bottom at intervals; wherein,
the tieback cylinder 3 is in threaded connection with the outer wall of the top end of the outer sleeve 1; the left-hand thread joint 2 is connected with the inner wall of the top end of the outer sleeve 1 in a threaded manner, and the left-hand thread joint 2 is positioned at the inner side of the cylinder body of the return cylinder 3; the tie-back cylinder 3 is used for being in threaded connection with a tie-back plug, and the back-off joint 2 is used for being in threaded connection with an upper tool string;
the upper sitting and hanging mechanism comprises an upper taper sleeve 4 and an upper slip 6; specifically, the upper taper sleeve 4 is sleeved and fixed on the outer sleeve 1 on the outer wall of the outer sleeve 1 through four set screws 5 arranged along the circumferential direction; the lower part of the upper taper sleeve 4 is processed into a tapered part with the outer diameter gradually reduced from top to bottom, four slideways arranged at intervals along the circumferential direction are arranged on the outer wall of the tapered surface of the tapered part, and each slideway is vertically and downwards arranged from the top end of the tapered part to the bottom end of the tapered part; the upper slip 6 is of a cylinder structure, the inner wall of the upper slip is processed into a conical surface with the inner diameter gradually increasing from top to bottom, and the conical surface can be attached to the conical part of the upper conical sleeve 4; four convex strips which are arranged at intervals along the circumferential direction are arranged on the inner wall of the conical surface of the upper slip 6, the four convex strips arranged on the inner wall of the upper slip 6 are respectively inserted into four slide ways arranged on the outer wall of the upper taper sleeve 4, so that the slips can slide up and down along the outer wall of the conical surface of the conical part, the outer diameter of the sitting and hanging mechanism is changed in the reciprocating sliding of the slips, and the sitting and hanging mechanism is hung on the inner wall of the shaft by the upward movement of the slips;
in order to prevent the four convex strips from separating from the four slide ways, as shown in fig. 2, the convex strips are processed into an i-shaped groove with the outer diameter of the outer side larger than the outer diameter of the inner side, and correspondingly, the slide ways are processed into an i-shaped groove with the outer diameter of the inner side larger than the inner diameter of the outer side;
the first hydraulic transmission mechanism comprises two first hydraulic cylinders 9 which are symmetrically arranged and fixed on the outer wall of the outer sleeve 1 and two first I-shaped pistons 8 which are respectively arranged in each hydraulic cylinder; the first I-shaped piston 8 consists of a first cross rod arranged inside the hydraulic cylinder cavity, a second cross rod arranged outside the hydraulic cylinder cavity and a vertical rod of which two ends are respectively fixed at the middle parts of the first cross rod and the second cross rod; specifically, second cross rods of first I-shaped pistons 8 are arranged below the upper sitting and hanging mechanism at intervals, first slip push rods 7 are vertically arranged below the upper slips 6, one ends of the slip push rods 7 are fixed on the bottom surfaces of the upper slips 6, and the other ends of the slip push rods 7 are fixedly connected with the second cross rods; the first cross rod is matched with the inner diameter of the hydraulic cylinder cavity, and a sealing ring is arranged on the first cross rod to seal the cross rod and the inner wall of the hydraulic cylinder, so that the inner cavity of the hydraulic cylinder is divided into an upper movable cavity and a lower liquid cavity; two first pressure transfer holes are symmetrically formed in the side wall of the outer sleeve 1 provided with the first hydraulic cylinder 9, meanwhile, a liquid inlet hole is formed in the side wall of the lower portion of the hydraulic cylinder adjacent to the outer sleeve 1, the two first pressure transfer holes are respectively communicated with liquid cavities below the two hydraulic cylinders through the liquid inlet holes formed in the side wall of the hydraulic cylinder, liquid entering an inner cavity of the outer sleeve enters the liquid cavities through the first pressure transfer holes, the first I-shaped piston 8 is pushed to move upwards, the upper slip 6 is further pushed to move upwards along the upper conical sleeve 4, and sitting and hanging are achieved; two sealing rings are respectively arranged on the outer wall of the outer sleeve above and below the first pressure transfer hole, so that the outer sleeve 1 and two sides of a communication channel of the hydraulic cylinder form sealing; a sealing ring is arranged on the wall of the through hole of the I-shaped piston, wherein the vertical rod penetrates out of the hydraulic cylinder, so that sealing is formed between the vertical rod and the wall of the through hole;
the structure of the lower sitting and hanging mechanism is the same as that of the lower sitting and hanging mechanism, a lower taper sleeve 11 of the lower sitting and hanging mechanism is sleeved and fixed below the outer sleeve 1 and below the outer wall of the outer sleeve 1 through four tacking screws 10 arranged along the circumferential direction; the lower part of the lower taper sleeve 11 is processed into a tapered part with the outer diameter gradually decreasing from bottom to bottom, four slideways are arranged at intervals along the circumferential direction under the outer wall of the tapered surface of the tapered part, and each slideway is vertically arranged from the top end of the tapered part downwards to the bottom end of the tapered part; the lower slip 12 is a cylinder structure, the inner wall of which is processed into a conical surface with the inner diameter gradually increasing from bottom to top, and the conical surface can be attached to the conical part of the lower taper sleeve 11; four raised strips which are arranged at intervals along the circumferential direction are arranged below the inner wall of the conical surface of the lower slip 12, and the four raised strips which are arranged below the inner wall of the lower slip 12 are respectively inserted into four slide ways which are arranged below the outer wall of the lower taper sleeve 11, so that the slips can slide downwards along the outer wall of the conical surface of the conical part; in order to prevent the four convex strips from being separated from the four slide ways, the convex strips are processed into an I-shaped groove with the outer diameter of the outer side larger than the outer diameter of the inner side, and correspondingly, the slide ways are processed into I-shaped grooves with the outer diameter of the inner side larger than the inner diameter of the outer side;
similarly, the second hydraulic transmission mechanism comprises two second hydraulic cylinders 15 which are symmetrically arranged and fixed on the outer wall of the outer sleeve 1 and two second I-shaped pistons 14 which are respectively arranged in each hydraulic cylinder; the second hydraulic transmission mechanism and the first hydraulic transmission mechanism are completely the same in structure and arrangement mode relative to the sitting and hanging mechanism; a second cross rod of a second I-shaped piston 14 is connected with a lower slip 12 through a second slip push rod vertically arranged below the lower sitting and hanging mechanism, two second pressure transfer holes symmetrically formed in the side wall of the outer sleeve 1 are communicated with liquid cavities below the two second hydraulic cylinders 15 through liquid inlet holes formed in the side walls of the two second hydraulic cylinders 15 respectively, so that liquid entering the inner cavity of the outer sleeve 1 enters the liquid cavities of the second hydraulic cylinders 15 through the second pressure transfer holes, the second I-shaped piston 14 is pushed to move upwards, the lower slip 12 is pushed to move upwards along the lower conical sleeve 11, and sitting and hanging are achieved;
the packing mechanism comprises an upper rubber cylinder seat 23, an upper rubber cylinder 24, a spacer ring 25, a lower rubber cylinder 26 and a lower rubber cylinder seat 27 which are sequentially sleeved on the outer side of the outer sleeve 1 from top to bottom;
the third hydraulic transmission mechanism and the first hydraulic transmission mechanism have the same structure but opposite arrangement directions; specifically, the third hydraulic transmission mechanism comprises two third hydraulic cylinders 21 which are symmetrically arranged and are inversely fixed on the outer wall of the outer sleeve 1 and two third i-shaped pistons 22 which are respectively arranged in each hydraulic cylinder; the second cross rods of the two third I-shaped pistons 22 are press-fit and fixed on the top surface of the upper rubber cylinder seat 23, two third pressure transfer holes symmetrically formed in the side wall of the outer sleeve 1 are communicated with the liquid cavity above the two second hydraulic cylinders 21 through liquid inlet holes formed in the side walls of the two third hydraulic cylinders 21 respectively, so that liquid entering the inner cavity of the outer sleeve 1 enters the liquid cavity of the third hydraulic cylinders 21 through the third pressure transfer holes, the second I-shaped piston 14 is pushed to move downwards, the upper rubber cylinder seat 23 is further pushed to downwards extrude the upper rubber cylinder 24, the upper rubber cylinder 24 is extruded, compressed and expanded, the outer diameter is increased to be consistent with the inner diameter of the shaft inner wall, and seating is realized;
the fourth hydraulic transmission mechanism and the first hydraulic transmission mechanism are identical in structure and arrangement direction; specifically, the fourth hydraulic transmission mechanism comprises two fourth hydraulic cylinders 29 which are symmetrically arranged and fixed on the outer wall of the outer sleeve 1 and two fourth H-shaped pistons 28 which are respectively arranged in each hydraulic cylinder; the second cross rods of the two fourth H-shaped pistons 28 are press-fit and fixed on the bottom surface of the lower rubber cylinder base 27, two fourth pressure transfer holes symmetrically formed in the side wall of the outer sleeve 1 are communicated with the liquid cavity below the two fourth hydraulic cylinders 29 through liquid inlet holes formed in the side walls of the two fourth hydraulic cylinders 29 respectively, so that liquid entering the inner cavity of the outer sleeve 1 enters the liquid cavity of the fourth hydraulic cylinders 29 through the fourth pressure transfer holes, the second H-shaped piston 14 is pushed to move upwards, the lower rubber cylinder base 26 is further pushed to extrude the upper rubber cylinder 24 upwards, the lower rubber cylinder 26 is extruded, compressed and expanded, the outer diameter is increased to be consistent with the inner diameter of the inner wall of the shaft, and seating is realized;
the first ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve between the sitting and hanging mechanism and the packing mechanism, and is specifically arranged on the inner wall of the outer sleeve between the second pressure transmission hole and the third pressure transmission hole; the second ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve below the packing mechanism, and is specifically arranged on the inner wall of the outer sleeve below the fourth pressure-transmitting hole;
the first ball-throwing pressure-building mechanism comprises a first setting barrel 16, a first ball seat 20 and a setting ball 18; wherein,
four axial convex strips are uniformly distributed on the outer wall of the first setting barrel 16 along the circumferential direction, correspondingly, four first guide grooves matched with the axial convex strips are formed on the inner wall of the outer sleeve 1 along the circumferential direction, so that the axial convex strips of the setting barrel are inserted into the guide grooves and can slide downwards along the first guide grooves; the first setting barrel 16 is fixed on the inner wall of the outer sleeve 1 through four shearing pins 17 arranged along the circumferential direction and is positioned at the uppermost part of the first guide groove;
as shown in fig. 4, the first ball seat 20 is a cylindrical structure, the top surface of the first ball seat is processed into a conical surface which is matched with the spherical surface of the setting ball 18, the first ball seat 20 is divided into four pieces by axial cutting, and the four pieces are respectively hinged to the bottom end of the first setting cylinder through a first hinge shaft 19; specifically, a vertically arranged inserting strip is arranged on the top surface of each section of the first ball seat 20, four through grooves which are uniformly distributed along the axial direction and can be inserted into the inserting strips are arranged upwards along the axial direction on the bottom surface corresponding to the first ball seat 20, so that the first ball seat 20 is movably connected to the first setting barrel 16 through a first hinge shaft 19 which is inserted into the inserting strips and the groove walls of the through grooves; a first annular groove is formed in the inner wall of the outer sleeve 1 below the first guide groove, the axial length of the first annular groove is larger than that of the first ball seat 20, when the first ball seat 20 moves downwards along with the first setting cylinder 16 for a certain distance to the first annular groove, the first ball seat 20 expands outwards under the pressure of the setting ball to increase the inner diameter, and the setting ball further passes through the first ball seat 20 and continues to move downwards to the second ball throwing and pressure building mechanism; wherein, the outer diameter of the setting ball is larger than the inner diameter of the first ball seat 20, and is smaller than the inner diameters of the first setting barrel 16 and the first ball seat 20 expanded to the outside.
The structure of the second ball-throwing pressure-holding mechanism is the same as that of the second ball-throwing pressure-holding mechanism, the second ball-throwing pressure-holding mechanism comprises a second setting barrel 31 and a second ball seat 33, and the setting ball 18 is matched with the second ball-throwing pressure-holding mechanism for use; four axial convex strips 3101 are uniformly distributed on the outer wall of the second setting barrel 31 along the circumferential direction, correspondingly, four second guide grooves matched with the axial convex strips are formed on the inner wall of the outer sleeve 1 along the circumferential direction, so that the axial convex strips of the setting barrel are inserted in the second guide grooves and can slide downwards along the second guide grooves; the second setting barrel 31 is fixed on the inner wall of the outer sleeve 1 through four shearing pins 30 arranged along the circumferential direction and is positioned at the uppermost part of the second guide groove; the top surface of the second ball seat 33 is processed into a conical surface which is matched with the spherical surface of the setting ball 18, and is equally divided into four pieces by axial cutting, and the four pieces are respectively hinged and connected to the bottom end of the second setting cylinder through a second hinge shaft 32; a second annular groove is formed in the inner wall of the outer sleeve 1 below the guide groove, the axial length of the second annular groove is larger than that of the second ball seat 33, when the second ball seat 33 moves downwards along with the second setting cylinder 31 for a certain distance to reach the second annular groove, the second ball seat 33 expands outwards under the pressure of the setting ball to increase the inner diameter, and the setting ball further passes through the second ball seat 33 and continues to move downwards to the second ball throwing and pressure building mechanism; wherein, the external diameter of the setting ball is larger than the internal diameter of the ball seat and is smaller than the internal diameter of the second setting cylinder and the second ball seat expanded to the outside.
In order to ensure that the first ball-throwing pressure-holding mechanism and the second ball-throwing pressure-holding mechanism are respectively opened, the shearing force of the first shearing pin 17 is far smaller than that of the second shearing pin 30.
The working principle of the single-ball type hydraulic liner hanger is as follows:
the back-off joint 2 of the single-ball hydraulic liner hanger is connected with a feeding tool, the tieback cylinder 3 is connected with a tieback plug, after the tieback cylinder is lowered to a preset position according to process design, a sitting ball 18 is thrown into the outer casing 1 to start pressure building, drilling fluid enters a first hydraulic cylinder 9 from a first pressure transmission hole and enters a second hydraulic cylinder 15 from a second pressure transmission hole, the first piston 8 and a second piston 14 are respectively pushed to move upwards by the pressure of the drilling fluid, and then an upper slip 6 and a lower slip 12 respectively move upwards along the conical surfaces of an upper conical sleeve 4 and a lower conical sleeve 11, so that slip sitting and hanging are realized;
when setting is needed, continuously pressurizing, so that a first shearing pin 17 between the first setting barrel 16 and the outer sleeve 1 is sheared off, the first setting barrel 16 descends along the inner wall of the outer sleeve 1 under the action of the pressure of the drilling fluid, meanwhile, the first setting ball seat 20 is pushed to descend, when the first setting ball seat 20 reaches a first annular groove position matched with the first setting ball seat 20, the first setting ball seat 20 rotates outwards along a first hinge shaft 19 under the action of the pressure of the drilling fluid, and the setting ball 18 falls to a second setting ball seat 33 to stop due to the increase of the inner diameter of the first setting ball seat 20; continuing suppressing pressure, enabling the drilling fluid to enter a third hydraulic cylinder 21 and a fourth hydraulic cylinder 29 from a third pressure transmission hole and a fourth pressure transmission hole respectively, pushing a third piston 22 to descend and a fourth piston 28 to ascend under the action of fluid pressure of the drilling fluid respectively, further pushing a first rubber cylinder seat 16 and a second rubber cylinder seat 31 to simultaneously extrude an upper rubber cylinder 24 and a lower rubber cylinder 26, and extruding and expanding the upper rubber cylinder 24 and the lower rubber cylinder 26, wherein at the moment, the functions of slip seat sealing and rubber cylinder sealing are simultaneously realized;
when the sealing needs to be unsealed, the pressure is continuously applied until the second shearing pin 30 between the second setting cylinder 31 and the outer sleeve 1 is sheared off, the second setting cylinder 31 descends along the inner wall of the outer sleeve 1 under the action of the drilling fluid pressure, meanwhile, the second setting ball seat 33 is pushed to descend, when the second setting ball seat 33 reaches the position of a second annular groove matched with the second setting ball seat 33, under the action of the drilling fluid pressure, the second setting ball seat 33 rotates outwards along the second hinge shaft 32, when the second setting ball seat 33 rotates into the second annular groove 33, the setting ball 18 falls off, the outer sleeve 1 restores the passage, and the next operation can be carried out.
The above examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope defined in the present application.
Claims (8)
1. A single-ball type hydraulic tail pipe hanger is characterized by comprising an outer sleeve (1), at least two sitting and hanging mechanisms, a packing mechanism, a plurality of hydraulic transmission mechanisms, a first ball-throwing pressure-holding mechanism and a second ball-throwing pressure-holding mechanism, wherein the first ball-throwing pressure-holding mechanism and the second ball-throwing pressure-holding mechanism are arranged on the inner side of the outer sleeve (1); the sitting and hanging mechanisms are arranged on the outer wall of the upper part of the outer sleeve (1), and a hydraulic transmission mechanism is arranged below each sitting and hanging mechanism; the packing mechanism is arranged on the outer wall of the lower part of the outer sleeve (1), and a hydraulic transmission mechanism is respectively arranged above and below the packing mechanism; a plurality of pressure transmission hole groups which are respectively communicated with the inner cavity of the hydraulic cylinder of each hydraulic transmission mechanism are arranged on the side wall of the outer sleeve (1) from top to bottom, so that the sitting and hanging mechanism and the packing mechanism are hung or packed on the inner wall of the shaft under the action of the hydraulic transmission mechanisms; the first ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve positioned between the sitting and hanging mechanism and the packing mechanism, and the second ball-throwing pressure-building mechanism is arranged on the inner wall of the outer sleeve positioned below the packing mechanism;
the hydraulic transmission mechanism comprises two hydraulic cylinders which are symmetrically arranged and fixed on the outer wall of the outer sleeve (1) and two I-shaped pistons which are respectively arranged in each hydraulic cylinder; the I-shaped piston consists of a first cross rod arranged inside the hydraulic cylinder cavity, a second cross rod arranged outside the hydraulic cylinder cavity and a vertical rod of which two ends are respectively fixed in the middle of the first cross rod and the second cross rod; the first cross rod is adaptive to the inner diameter of the hydraulic cylinder cavity; the second cross rod is directly fixed on the rubber cylinder seat or fixed on the bottom surface of the slip through the push rod;
the first ball-throwing pressure-building mechanism and the second ball-throwing pressure-building mechanism respectively comprise a setting cylinder, a ball seat and a setting ball; wherein, the setting cylinder is fixed on the outer sleeve (1) through a plurality of shear pins arranged along the circumferential direction; the ball seat is axially cut into a plurality of pieces and is hinged to the bottom end of the setting cylinder, an annular groove with the size matched with that of the ball seat is formed in the inner wall of the outer sleeve (1) below the ball seat, and the ball seat can be expanded outwards to increase the inner diameter when moving downwards to the annular groove along with the setting cylinder; the outer diameter of the setting ball is larger than the inner diameter of the ball seat and smaller than the inner diameters of the setting cylinder and the expanded ball seat.
2. The single-ball hydraulic liner hanger of claim 1, wherein the setting and hanging mechanism comprises a taper sleeve and a slip; wherein, the taper sleeve is sleeved and fixed on the outer sleeve (1) on the outer wall of the outer sleeve (1) through a plurality of set screws arranged along the circumferential direction; the lower part of the taper sleeve is a tapered part with the outer diameter gradually reduced from top to bottom, and the outer wall of the tapered surface of the tapered part is provided with a plurality of slideways arranged at intervals along the circumferential direction; the slips is a barrel structure, the inner wall of the slips is a conical surface with the inner diameter gradually increasing from top to bottom, a plurality of convex strips arranged at intervals along the circumferential direction are arranged on the conical surface, and the convex strips are matched with the slide ways to enable the slips to slide up and down along the outer wall of the conical surface of the conical part.
3. The single-ball hydraulic liner hanger according to claim 2, wherein the packing mechanism comprises an upper rubber cylinder seat, a plurality of rubber cylinders and a lower rubber cylinder seat which are sequentially sleeved on the outer side of the outer sleeve (1) from top to bottom, and a spacer ring is arranged between two adjacent rubber cylinders.
4. The single-ball hydraulic liner hanger of claim 3, wherein a seal ring is provided on the outside of the first cross bar to seal the cross bar to the inner wall of the hydraulic cylinder; a sealing ring is arranged on the wall of the through hole of the I-shaped piston, wherein the vertical rod penetrates out of the hydraulic cylinder, so that sealing is formed between the vertical rod and the wall of the through hole; at least one sealing ring is respectively arranged on the outer wall of the outer sleeve above and below each pressure transfer hole group, so that the outer sleeve (1) and two sides of a communication channel of the hydraulic cylinder form sealing.
5. The single-ball hydraulic liner hanger according to claim 1, wherein a plurality of axial convex strips are circumferentially arranged on the outer wall of the setting cylinder, and a plurality of guide grooves matched with the axial convex strips are circumferentially arranged on the inner wall of the outer sleeve (1), so that the axial convex strips of the setting cylinder are inserted into the guide grooves and can slide downwards along the guide grooves; the length of the guide groove is larger than the axial length of the setting cylinder, the guide groove is initially fixed at the uppermost part of the guide groove, and the annular groove is arranged below the guide groove.
6. The single-ball hydraulic liner hanger according to claim 1, wherein a tieback (3) is screwed to the outer wall of the top end of the outer sleeve (1).
7. The single-ball hydraulic liner hanger according to claim 6, wherein a back-off connector (2) is screwed on the inner wall of the top end of the outer sleeve (1), and the back-off connector (2) is located inside the body of the tieback cylinder (3).
8. The single-ball hydraulic liner hanger according to claim 1, wherein a centralizer (34) is sleeved on the outer wall of the bottom end of the outer casing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711254018.4A CN108060907B (en) | 2017-12-03 | 2017-12-03 | Single-ball type hydraulic liner hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711254018.4A CN108060907B (en) | 2017-12-03 | 2017-12-03 | Single-ball type hydraulic liner hanger |
Publications (2)
| Publication Number | Publication Date |
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| CN108060907A CN108060907A (en) | 2018-05-22 |
| CN108060907B true CN108060907B (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711254018.4A Active CN108060907B (en) | 2017-12-03 | 2017-12-03 | Single-ball type hydraulic liner hanger |
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| Country | Link |
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| CN (1) | CN108060907B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575773B (en) * | 2020-12-01 | 2024-08-16 | 中国石油化工股份有限公司 | Tail pipe suspension device with top packer and tail pipe suspension assembly |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2328840A (en) * | 1940-06-03 | 1943-09-07 | Charles M O'leary | Liner hanger |
| CN200982176Y (en) * | 2006-09-22 | 2007-11-28 | 大庆石油管理局 | Single ball type hydraulic releasing tail pipe hanger |
| CN101265789A (en) * | 2008-05-09 | 2008-09-17 | 中国石油天然气集团公司 | Compound pressurized cyclone tail tube hanging packer |
| CN201705253U (en) * | 2010-04-09 | 2011-01-12 | 新疆贝肯能源工程股份有限公司 | Fully hydraulic controlled liner hanger |
| CN102268974A (en) * | 2011-07-28 | 2011-12-07 | 中国石油集团西部钻探工程有限公司 | Special tail pipe hanging packing assembly for shallow horizontal well |
| CN104120998A (en) * | 2014-07-04 | 2014-10-29 | 中国石油天然气股份有限公司 | Suspension packer for gas well layered exploitation |
| CN106930719A (en) * | 2017-03-23 | 2017-07-07 | 中国石油集团西部钻探工程有限公司 | Can unseal, unjaming insulates formula extension hanger |
| CN206625821U (en) * | 2017-03-23 | 2017-11-10 | 中国石油集团西部钻探工程有限公司 | Double ball seat fracturing sliding bushs |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7644772B2 (en) * | 2007-08-13 | 2010-01-12 | Baker Hughes Incorporated | Ball seat having segmented arcuate ball support member |
-
2017
- 2017-12-03 CN CN201711254018.4A patent/CN108060907B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2328840A (en) * | 1940-06-03 | 1943-09-07 | Charles M O'leary | Liner hanger |
| CN200982176Y (en) * | 2006-09-22 | 2007-11-28 | 大庆石油管理局 | Single ball type hydraulic releasing tail pipe hanger |
| CN101265789A (en) * | 2008-05-09 | 2008-09-17 | 中国石油天然气集团公司 | Compound pressurized cyclone tail tube hanging packer |
| CN201705253U (en) * | 2010-04-09 | 2011-01-12 | 新疆贝肯能源工程股份有限公司 | Fully hydraulic controlled liner hanger |
| CN102268974A (en) * | 2011-07-28 | 2011-12-07 | 中国石油集团西部钻探工程有限公司 | Special tail pipe hanging packing assembly for shallow horizontal well |
| CN104120998A (en) * | 2014-07-04 | 2014-10-29 | 中国石油天然气股份有限公司 | Suspension packer for gas well layered exploitation |
| CN106930719A (en) * | 2017-03-23 | 2017-07-07 | 中国石油集团西部钻探工程有限公司 | Can unseal, unjaming insulates formula extension hanger |
| CN206625821U (en) * | 2017-03-23 | 2017-11-10 | 中国石油集团西部钻探工程有限公司 | Double ball seat fracturing sliding bushs |
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|---|---|
| CN108060907A (en) | 2018-05-22 |
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Effective date of registration: 20210630 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |