CN114427363B - Setting tool, liner hanger and liner hanger assembly comprising same - Google Patents
Setting tool, liner hanger and liner hanger assembly comprising same Download PDFInfo
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- CN114427363B CN114427363B CN202011023091.2A CN202011023091A CN114427363B CN 114427363 B CN114427363 B CN 114427363B CN 202011023091 A CN202011023091 A CN 202011023091A CN 114427363 B CN114427363 B CN 114427363B
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- hanger
- sleeve
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- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 230000002159 abnormal effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/021—Devices for subsurface connecting or disconnecting by rotation
-
- 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
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- 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)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The present invention relates to a setting tool, a liner hanger and a liner hanger assembly incorporating the same. The running tool includes: a mandrel; a sitting and hanging driving mechanism sleeved outside the mandrel; a release mechanism connected to the lower end of the mandrel, the release mechanism comprising an outwardly facing second threaded portion configured to engage with a first threaded portion on a hanger body of a liner hanger, the second threaded portion configured to be non-rotatable relative to the mandrel; and a connection mechanism configured to engage with a tieback barrel of the liner hanger; under normal sitting and hanging and abnormal sitting and hanging states, the mandrel of the running tool is rotated, so that the first threaded part of the hanger body can be separated from the second threaded part of the releasing mechanism, and the tieback cylinder can be separated from the connecting mechanism.
Description
Technical Field
The invention relates to the technical field of petroleum well completion, in particular to a running tool. The invention also relates to a liner hanger for use with the setting tool. The invention also relates to a liner hanger assembly comprising the liner hanger and a running tool as described above.
Background
The liner hanger is a downhole tool commonly used in petroleum exploration and development at present, and can be divided into three types of mechanical type, hydraulic type and hydraulic mechanical double-acting type according to different sitting and hanging modes. Hydraulic liner hangers are most widely used. The traditional hydraulic liner hanger is designed outside the hanger body, and the traditional hydraulic liner hanger is left in the well for a long time after well cementation construction is finished, and the traditional hydraulic liner hanger is easy to age in a high-temperature and high-pressure environment in the well for a long time due to the fact that the traditional hydraulic liner hanger inevitably needs to use a rubber sealing piece for the traditional hydraulic liner hanger, so that sealing failure of the hydraulic liner hanger is caused, and sealing durability of the whole shaft is affected.
Therefore, technical researches on a liner hanger with a recyclable driving mechanism are sequentially carried out at home and abroad, and the potential risk point and weak point that the sitting and hanging driving mechanism stays in a well for a long time are eliminated. Because of the change of the setting mode of the liner hanger, a special setting-preventing mechanism needs to be designed on the setting tool to prevent the liner from being set in advance in the liner setting process (for example, refer to US20180223615 A1). After the tail pipe is put in place, the locking is released through the pressure-holding pressure in the pipe, so that the operations of slip sitting and hanging, tail pipe releasing and the like can be realized through the pressure-holding pressure. However, if the pressure in the pipe cannot be normally realized, unlocking cannot be completed, and release cannot be performed, so that a serious safety accident is caused. Although the patent designs a special shearable stop block, the separation of the running tool and the tieback cylinder can be realized by forced lifting, the mode solves the unlocking problem, but increases the risk of leading the seat in the tail pipe falling process, thereby failing to completely meet the requirement of preventing the seat from being hung in advance. This is because this solution places very stringent requirements on the shear value of the shearable stops. If the shear value is large, the load required for on-site lifting is large, and the shear requirement may not be met when the tail pipe is light in weight. If the set shearing value is smaller, the lifting resistance or the jamming in the tail pipe descending process can cause and shear in advance, so that the tail pipe hanger is sat and hung in advance.
In addition, because the well environment is often very complex, the hanger sometimes encounters a failure to sit on. Also, because the well environment is very complex, operators may not be able to accurately know if the hanger is successfully seated in some situations. In these cases, subsequent release and cementing operations cannot be performed, greatly increasing the difficulty and risk of field operations.
Disclosure of Invention
In view of the above, the present invention proposes a setting tool, liner hanger and liner hanger assembly incorporating the same for eliminating or at least reducing at least one of the above problems.
According to a first aspect of the present invention, there is provided a running tool comprising: a mandrel; a sitting and hanging driving mechanism sleeved outside the mandrel; a release mechanism connected to the lower end of the mandrel, the release mechanism comprising an outwardly facing second threaded portion configured to engage with a first threaded portion on a hanger body of a liner hanger, the second threaded portion configured to be non-rotatable relative to the mandrel; and a connection mechanism configured to engage with a tieback barrel of the liner hanger; under normal sitting and hanging and abnormal sitting and hanging states, the mandrel of the running tool is rotated, so that the first threaded part of the hanger body can be separated from the second threaded part of the releasing mechanism, and the tieback cylinder can be separated from the connecting mechanism.
In both the normal setting and the abnormal setting of the liner hanger described above, the various components of the liner hanger (including the tieback barrel and hanger body) can be completely separated from the entire running tool or the main retrieving portion of the running tool by rotating the running tool. After that, the running tool is lifted up to realize the effective recovery of the running tool, so that the effective recovery of the sitting and hanging driving mechanism is realized. That is, the operator can effectively retrieve the running tool or the main retrieving portion of the running tool to the surface by a simple rotation action without having to check in detail whether the liner hanger is successfully seated or not, the reason why the liner hanger is not successfully seated, and the current state of the running tool and the liner hanger.
In one embodiment, the connection mechanism comprises: the connecting joint is sleeved outside the mandrel and is fixedly connected with the mandrel in a rotating way, and a joint limiting hole is formed in the side wall of the connecting joint; the connecting sleeve is sleeved outside the mandrel, the upper end of the connecting sleeve extends upwards to cover at least one part of the outer side wall of the connecting joint along the axial direction, a fixed block receiving groove is formed in the inner side of the upper end of the connecting sleeve, and a threaded member receiving hole penetrating through the connecting sleeve along the radial direction is formed in the lower end of the connecting sleeve; the connecting sleeve fixing block is arranged in the joint limiting hole; and a first threaded member disposed within the threaded member receiving bore, an outer sidewall of the first threaded member configured with a fourth threaded portion for engagement with a third threaded portion on a tieback barrel of the liner hanger; wherein in an initial state, the fixed block receiving groove is disposed opposite the joint limiting hole, the connection sleeve fixed block extends into the fixed block receiving groove to limit axial movement of the connection sleeve relative to the connection joint, the connection mechanism is further configured to limit rotational movement of the connection sleeve relative to the connection joint, and the third threaded portion engages with the fourth threaded portion to connect the connection sleeve with the tieback tube; in an abnormal sitting and hanging state, the third threaded portion is separated from the fourth threaded portion by rotating the mandrel, so that the connecting sleeve is separated from the tieback cylinder.
In one embodiment, at least one connection joint anti-rotation groove extending in the axial direction is configured at the lower end of the connection joint, at least one connection sleeve anti-rotation tooth extending in the axial direction is configured at the upper end of the connection sleeve, by which connection sleeve anti-rotation tooth the rotational movement of the connection sleeve relative to the connection joint is limited.
In one embodiment, the connection mechanism comprises: the connecting joint is sleeved outside the mandrel and is fixedly connected with the mandrel in a rotating way, and a joint limiting hole is formed in the side wall of the connecting joint; the connecting sleeve is sleeved outside the mandrel, the upper end of the connecting sleeve extends upwards to cover at least one part of the outer side wall of the connecting joint along the axial direction, a fifth thread part is formed on the inner side of the upper end of the connecting sleeve, and a fixed block receiving hole penetrating through the connecting sleeve along the radial direction is formed at the lower end of the connecting sleeve; a second screw member provided in the joint limiting hole, an outer side wall of the second screw member being configured with a sixth screw portion for engagement with a fifth screw portion of the connection sleeve; and a tieback cylinder fixing block arranged in the fixing block receiving hole; wherein in an initial state, the fifth threaded portion engages with the sixth threaded portion to connect the connection sleeve and the connection fitting together, the fixed block receiving bore is disposed opposite a fixed block receiving slot on a tieback barrel of the liner hanger, the tieback barrel fixed block extends into the fixed block receiving slot to limit axial movement of the tieback barrel relative to the connection sleeve, the connection mechanism is further configured to limit rotational movement of the tieback barrel relative to the connection sleeve; in an abnormal sitting and hanging state, the fifth thread part is separated from the sixth thread part by rotating the mandrel, so that the connecting sleeve connected with the tieback cylinder is separated from the connecting joint.
In one embodiment, the lower end of the connection sleeve is configured with at least one hanger anti-rotation slot extending in a longitudinal direction, the at least one hanger anti-rotation slot being configured to engage with at least one hanger anti-rotation tooth extending in a longitudinal direction at an upper end of a tieback barrel of the liner hanger, limiting rotational movement of the tieback barrel relative to the connection sleeve.
According to a second aspect of the present invention, there is provided a liner hanger comprising: a tubular hanger body having a first threaded portion configured to be engageable with a second threaded portion of a running tool on an inner side thereof; the tieback cylinder is sleeved outside the hanger body, is configured to be unable to rotate relative to the hanger body and is configured to be engaged with a connection mechanism of the running tool; wherein, under normal sitting and hanging and abnormal sitting and hanging states, the first thread part of the hanger body can be separated from the second thread part of the sending tool by rotating the sending tool, and the tieback cylinder is separated from at least one part of the connecting mechanism.
In one embodiment, at least one hanger anti-rotation groove extending in the axial direction is configured on an outer sidewall of the hanger body; the liner hanger further comprises: the hanger connecting sleeve is sleeved outside the hanger body, the upper end of the hanger connecting sleeve is fixedly connected with the lower end of the tie-back cylinder, at least one hanger limiting hole is formed in the side wall of the hanger connecting sleeve, and each hanger limiting hole is arranged opposite to the corresponding hanger anti-rotation groove; and hanger anti-rotation blocks arranged in the hanger connecting through holes, wherein the hanger anti-rotation blocks extend into the hanger anti-rotation grooves, so that the tie-back barrel cannot rotate relative to the hanger body.
In one embodiment, the liner hanger further comprises: the anti-back sleeve is sleeved outside the hanger body, the upper end of the anti-back sleeve is fixedly connected with the hanger connecting sleeve, an anti-back piece is arranged between the anti-back sleeve and the hanger body, and the anti-back piece is configured to only allow the anti-back sleeve to move downwards relative to the hanger body in the axial direction; the outer side surface of the lower end of the taper sleeve forms an inclined surface; the slip connecting sleeve is sleeved outside the hanger body and connected with the hanger body through a hanger shearing pin, and the slip connecting sleeve is spaced from the taper sleeve in the axial direction; the slips are sleeved outside the hanger body, the slips are positioned between the taper sleeve and the slip connecting sleeve, the lower ends of the slips are hinged with the upper ends of the slip connecting sleeve, and the upper ends of the slips are free ends; wherein setting is achieved by relative movement of the drogue relative to the slips towards each other such that the slips move onto the inclined faces of the drogue.
In one embodiment, a third threaded portion is configured on an inner sidewall of the upper end of the tieback barrel, the third threaded portion being configured to be engageable with a fourth threaded portion of a connection mechanism of the running tool; wherein the first threaded portion on the hanger body and the third threaded portion on the tieback barrel have the same rotational direction such that the first threaded portion and the second threaded portion and the third threaded portion and the fourth threaded portion can be simultaneously separated by rotating the running tool.
In one embodiment, the upper end of the tieback barrel is configured with at least one hanger anti-rotation tooth extending in an axial direction, the at least one hanger anti-rotation tooth being configured to mate with at least one hanger anti-rotation slot extending in a longitudinal direction on the connection mechanism of the running tool to limit rotational movement of the tieback barrel relative to at least a portion of the running tool; the inner side of the upper end of the tieback cylinder is also provided with a fixed block receiving groove which is used for receiving a tieback cylinder fixed block in a connecting mechanism of the running tool so as to limit the axial movement of the tieback cylinder relative to the connecting mechanism.
According to a third aspect of the present invention there is provided a liner hanger assembly comprising the liner hanger described above and a setting tool.
The main advantage achieved by the liner hanger assembly described above and the liner hanger and running tool therein is that it is possible to achieve efficient separation of the liner hanger from the running tool (or its main recovery portion) and thereby recover the running tool with the seat-hanging drive mechanism by a simple rotational action. In addition, through the novel structural design of the liner hanging assembly, the liner hanger and the running tool in the liner hanging assembly, the hanger can be effectively prevented from being hung in advance.
Drawings
The invention is described in more detail hereinafter with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view showing a construction of a liner suspension assembly according to a first embodiment of the present invention, wherein the liner suspension assembly is shown in an initial state;
FIG. 2 shows a schematic view of the setting tool of the liner hanger assembly of FIG. 1;
FIG. 3 shows an enlarged partial schematic view of the running tool of FIG. 2;
FIG. 4 shows a schematic view of a liner hanger in the liner hanger assembly of FIG. 1;
FIGS. 5 and 6 are schematic views illustrating operation of the liner hanger assembly of FIG. 1 in an abnormal seat-hanging condition;
FIG. 7 shows a schematic view of a portion of a setting tool in a liner suspension assembly in accordance with a second embodiment of the invention;
fig. 8 to 10 are schematic views showing an operation of the liner hanging assembly according to the second embodiment of the present invention in an abnormal seating and hanging state.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Fig. 1-6 illustrate a first embodiment of a liner suspension assembly 1000 in accordance with the present invention. As shown in fig. 1, a liner hanger assembly 1000 includes a running tool 100 and a liner hanger 200.
Fig. 2 and 3 show the construction of the running tool 100 in detail. The running tool 100 includes a mandrel 110 extending in an axial direction. The upper end of the mandrel 110 may be connected to an upstream tubular string by an upper joint. The running tool 100 further includes a connection mechanism 120, a seat-hanging driving mechanism 130, and a releasing mechanism 140 that are sequentially sleeved on the mandrel 110 from top to bottom. It should be appreciated that mandrel 110 may be constructed as one piece or may be formed from multiple segments joined together.
The connection mechanism 120 includes a connection joint 122 fixedly sleeved on the mandrel 110. The stationary socket can be realized, for example, in the following manner. At the upper end of the connection joint 122, a fixed connection hole 122A penetrating the connection joint 122 in the radial direction is configured. A joint connection block 121 is provided in the fixed connection hole 122A. The shape of the fixed connection hole 122A is matched with the shape of the joint connection block 121 to restrict the axial movement and circumferential movement of the joint connection block 121 with respect to the fixed connection hole 122A. A corresponding cover plate is provided on the outer side of the connection joint 122 for covering the joint connection block 121 and restricting its radially outward movement. A corresponding joint coupling groove 110A is formed on the outer sidewall of the mandrel 110. The joint connection groove 110A corresponds to the position of the fixing connection hole 122A and the joint connection block 121 such that the joint connection block 121 can be inserted into the joint connection groove 110A to extend radially inward. The joint connection groove 110A is configured as a slot extending in the longitudinal direction to restrict radial movement of the joint connection block 121 with respect to the spindle 110 and to allow a certain range of axial movement of the joint connection block with respect to the spindle 110 in the axial direction.
It should be understood that the fixed connection hole 122A may alternatively be manufactured as a blind hole, whereby an outer cover plate may be omitted.
In a preferred embodiment, a plurality of fixing connection holes 122A spaced apart from each other are uniformly distributed in the circumferential direction of the connection joint 122, and a plurality of joint connection blocks 121 and joint connection grooves 110A are provided accordingly.
As also shown in fig. 2 and 3, the connection mechanism 120 further includes a connection sleeve 124 disposed below the connection joint 122. The connection sleeve 124 is detachably connected with the connection joint 122. They are connected in the following manner. At the lower end of the connection joint 122, a joint limiting hole 122B penetrating the connection joint 122 in the radial direction is configured. A connecting sleeve fixing block 123 is provided in the joint limiting hole 122B. The upper end inner side of the connection sleeve 124 is configured with a fixing block receiving groove 124B. The upper end of the connecting sleeve 124 extends axially upwardly beyond the lower end of the connecting fitting 122 such that the block receiving slot 124B is aligned with the fitting limiting aperture 122B and the connecting sleeve block 123 extends radially outwardly into the block receiving slot 124B. The shape of the joint limiting hole 122B is configured to match the shape of the connecting sleeve fixing block 123 to limit the movement of the connecting sleeve fixing block 123 in the circumferential and axial directions. The fixing block receiving groove 124B may be configured, for example, as an annular groove that is positively engaged with the connecting sleeve fixing block 123 to limit axial movement of the connecting sleeve fixing block 123 relative to the connecting sleeve 124. In addition, an extension sleeve 126 is also provided between the lower end of the connection joint 122 and the mandrel 110. The extension sleeve extends to the inside of the connection sleeve fixing block 123 for restricting radial movement of the connection sleeve fixing block 123. That is, when the extension sleeve 126 is inside the connection sleeve fixing block 123, the connection sleeve fixing block 123 extends radially outwardly into the fixing block receiving groove 124B of the connection sleeve 124. When the extension sleeve 126 moves down to be separated from the connection sleeve-fixing block 123, a free space is formed inside the connection sleeve-fixing block 123. The connecting sleeve retainer block 123 is movable radially inward to disengage the retainer block receiving slot 124B.
In addition, at least one (preferably a plurality of) connection-tab anti-rotation grooves 122D extending in the axial direction are also configured at the lower end of the connection tab 122. Accordingly, at least one (preferably a plurality of) coupling sleeve anti-rotation teeth 124D extending in the axial direction are configured at the upper end of the coupling sleeve 124. Circumferential rotational movement of the connection sleeve 124 relative to the connection fitting 122 may be limited by insertion of the connection sleeve anti-rotation teeth 124D into the connection fitting anti-rotation slots 122D.
It should be appreciated that the connecting sleeve 124 may be constructed as one piece or may be formed from a plurality of sleeve members connected together.
In a preferred embodiment, a plurality of fixing block receiving grooves 124B spaced apart from each other are uniformly distributed in the circumferential direction of the connection joint 122, and a plurality of connection sleeve fixing blocks 123 are correspondingly provided.
In an alternative embodiment, the attachment block receiving slot 124B inside the attachment sleeve 124 matches the shape of the attachment sleeve attachment block 123 to limit movement of the attachment sleeve attachment block 123 in both the axial and circumferential directions. Therefore, the arrangement of the connecting sleeve anti-rotation teeth 124D and the connecting joint anti-rotation grooves 122D can be omitted, so that the structure is simpler. However, an embodiment in which the fixed block receiving groove 124B is an annular groove is more preferable from a processing point of view.
As shown in fig. 2 and 3, a screw member receiving hole penetrating the connection sleeve 124 in a radial direction is configured at a lower end of the connection sleeve 124. A first screw member 129 is disposed within the screw member receiving bore. A fourth threaded portion 129C is configured on the outer sidewall of the first threaded member 129 for engagement with a third threaded portion 210C (described in detail below) on the tieback barrel of the liner hanger 200.
A support sleeve 128 is also interposed between the mandrel 110 and the connection sleeve 124. The support sleeve 128 is connected to the connection sleeve 124 by shear pins 127. In the initial state, the outer side wall of the main body of the support sleeve 128 abuts against the inner side wall of the first screw member 129 so that the first screw member 129 is held in the screw member receiving hole, and the fourth screw portion 129C thereon protrudes radially outwardly to a state capable of engaging with the third screw portion 210C on the tieback tube. In addition, the support sleeve 128 is also configured with an outer diameter reduction 128C that is located below the body of the support sleeve 128. When the support sleeve 128 is moved axially upward relative to the connection sleeve 124, the reduced outer diameter portion 128C opposes the first threaded member 129, allowing the first threaded member 129 to move radially inward and allowing the fourth threaded portion 129C to retract radially inward to a state where it can no longer engage the third threaded portion 210C on the tie-back barrel.
In addition, the connection mechanism 120 includes a hitch sleeve 125 fixedly attached (e.g., by threads) to the exterior of the extension sleeve 126. The hitch sleeve 125 is axially located between the connection joint 122 and the support sleeve 128. Hereinafter, the function of the hooking sleeve 125 will be described in detail with reference to the description of the working process.
As shown in fig. 2 and 3, the hitch driving mechanism 130 includes a piston cylinder 133 fixedly coupled to the outside of the spindle 110, and a piston chamber is formed between the piston cylinder 133 and the spindle 110. A piston sleeve 132 is disposed within the piston cylinder 133, and the piston sleeve 132 extends upwardly beyond the piston cylinder 133 and is fixedly connected (e.g., by threads) to the extension sleeve 126. Piston sleeve 132 is connected to mandrel 110 by shear pin 131. The piston sleeve 132 is in sealing sliding engagement with the piston cylinder 133. Corresponding fluid passages are configured on the mandrel such that fluid within mandrel 110 can pass through the fluid passages into piston cylinder 133 to urge piston sleeve 132 axially downwardly.
As also shown in fig. 2, the release mechanism 140 includes a back-off nut 141 that is sleeved on the outside of the mandrel 110, and a second threaded portion 141F is configured on the outer sidewall of the back-off nut 141 for engagement with a first threaded portion 220F (described in detail below) on the hanger body of the liner hanger 200.
It should be understood that the second screw portion 141F may be provided by other forms.
Fig. 4 schematically illustrates one embodiment of a liner hanger 200. The liner hanger 200 includes a tubular hanger body 220. The inside of the hanger body 220 is configured with a first screw portion 220F for engagement with the second screw portion 141F described above.
In addition, the liner hanger 200 further includes a tieback tube 210, a hanger adapter sleeve 230, an anti-back sleeve 240, and a cone sleeve 250 that are sequentially sleeved outside the hanger body 220 from top to bottom. Which are fixedly connected to each other (e.g., by threads) and are axially movable relative to hanger body 220. It will be appreciated that all or a portion of them may be integrally constructed as desired.
The tieback cylinder 210 extends axially upward and is configured with a third threaded portion 210C on the inside of its upper end for engagement with a fourth threaded portion 129C on the first threaded member 129.
A hanger stopper hole 230G penetrating the hanger connecting sleeve 230 in a radial direction is constructed on a sidewall of the hanger connecting sleeve 230. A hanger rotation preventing block 290 is provided in the hanger stopper hole 230G. The shape of the hanger anti-rotation block 290 matches the shape of the hanger limit hole 230G to limit axial and circumferential movement of the hanger anti-rotation block 290 relative to the hanger connection sleeve 230. A corresponding hanger anti-rotation groove 220G is constructed on an outer sidewall of the hanger body 220. The hanger anti-rotation block 290 can extend radially inward into the hanger anti-rotation slot 220G. The hanger anti-rotation slots 220G extend in an axial direction and are shaped to mate with the hanger anti-rotation blocks 290 to limit circumferential movement of the hanger anti-rotation blocks 290 relative to the hanger body 220 and to allow axial movement of the hanger anti-rotation blocks 290 relative to the hanger body 220 to a range. A cover plate is covered on the outer side of the hanger connecting sleeve 230, and the cover plate and the hanger body 220 are respectively clamped on the inner side and the outer side of the hanger rotation preventing block 290 to limit the movement of the hanger rotation preventing block 290 in the radial direction.
Preferably, a plurality of hanger limiting holes 230G spaced apart from each other may be provided along the circumference of the hanger connecting sleeve 230, and a plurality of hanger anti-rotation blocks 290 and hanger anti-rotation grooves 220G may be provided accordingly.
In an alternative embodiment, hanger stop hole 230G may be configured as a blind hole. Thereby, the cover plate can be omitted.
The inner side of the anti-back sleeve 240 is provided with an anti-back piece 241 (for example, an anti-back clip spring) for engagement with the hanger body 220. Thus, the anti-back-out sleeve 240, as well as the backer cylinder 210, hanger adapter sleeve 230, and cone sleeve 250 fixedly connected thereto, can be moved only axially downward and not axially upward.
The outer side surface of the lower end of the cone sleeve 250 forms an inclined surface 251. A slip adapter sleeve 270 and slips 260 are also sleeved outside the hanger body 220. The slip adapter sleeve 270 is connected to the hanger body 220 by hanger shear pins 280. The slip adapter sleeve 270 is disposed below the cone sleeve 250 in spaced apart relation to the cone sleeve 250 in the axial direction. Slips 260 are positioned between cone sleeve 250 and slip adapter sleeve 270 with their lower ends hinged to the upper ends of slip adapter sleeve 270, the upper ends being configured as free ends. As the cone sleeve 250 moves relative to the slips 260 toward each other, the slips 260 can move onto the inclined face 251 of the cone sleeve 250 and along the inclined face 251. Thus, slips 260 may be moved radially outward and allowed to ride against the borehole wall.
In the embodiment described above, the first, second, third and fourth threaded portions 220F, 141F, 210C and 129C have the same sense of rotation (e.g., left-hand), while all remaining connection threads that are not desired to be loosened during the release process have opposite senses of rotation (e.g., right-hand).
In the foregoing, the first embodiment of the hanger assembly 1000 in the initial state is mainly described. In this initial state, the tieback barrel, hanger adapter sleeve 230, anti-backup sleeve 240 and cone sleeve 250 do not undergo downward movement relative to hanger body 220 during liner running by the securement of connection sub 122 and connection sleeve 124 relative to mandrel 110 and the engagement of third threaded portion 210C with fourth threaded portion 129C (preferably also including the engagement of anti-backup sleeve 240). Thus, the liner hanger 200 can be prevented from being seated in advance to the maximum extent.
In addition, even if the liner hanger 200 is set in advance in the extreme case downhole, the hanger shear pin 280 may be sheared by lifting the running tool 100 up, thereby effecting unlocking of the hanger to retrieve the entire liner hanger assembly 1000 to the surface.
The normal setting process of the liner hanger assembly 1000 described above is as follows. Fluid is forced into the piston cavity of the piston cylinder 133 through the fluid passage by the well pressure build-up to push the piston sleeve 132 axially downward, shearing the shear pin 131. The piston sleeve 132 moves downward with the extension sleeve 126 and the hitch sleeve 125 fixedly connected to the extension sleeve 126. On the one hand, the extension sleeve 126 moves down to the inner side away from the connection sleeve fixing block 123. Thereby, the connecting sleeve fixing block 123 can be moved radially inward to be disengaged from the fixing block receiving groove 124B of the connecting sleeve 124, so that the connecting sleeve 124 and the connecting joint 122 can be separated from each other. On the other hand, the hitch sleeve 125 can move downwardly into engagement with the support sleeve 128 and continue to push the support sleeve 128 downwardly. Thereby, the connection sleeve 124 connected to the support sleeve 128 is moved downward together, and the tie-back cylinder 210, the hanger connecting sleeve 230, the anti-back sleeve 240, and the taper sleeve 250 are further moved downward together. Seating is effectively achieved as slips 260 move radially outward along inclined face 251 of cone sleeve 250.
After normal sitting, release and recovery may be achieved by rotating mandrel 110 of running tool 100. Specifically, by rotating mandrel 110, first threaded portion 220F of hanger body 220 may be separated from second threaded portion 141F of release mechanism 140. Thereafter, the mandrel 110 is lifted such that the piston cylinder 133, the piston sleeve 132, the extension sleeve 126 and the hitch sleeve 125 move upward together, but the connection sleeve 124 and the support sleeve 128 do not move upward together as they have been separated. When the piston cylinder 133 moves upward into engagement with the lower end of the support sleeve 128, the support sleeve 128 may be urged to move upward together. At this time, the shear pin 127 shears, and the support sleeve 128 moves upward relative to the connection sleeve 124 to a position where the reduced outer diameter portion 128C opposes the first threaded member 129, allowing the first threaded member 129 to move radially inward to the point where the third threaded portion 210C is separated from the fourth threaded portion 129C. Thereafter, the pull-up continues, and the running tool 100 or the main components of the running tool 100 including the hitch drive 130 may be retrieved to the surface.
If the landing drive mechanism 130 fails to work properly (e.g., due to a failure in the well pressure build-up), the release and recovery may also be accomplished by rotating the mandrel 110 of the running tool 100. Specifically, if not properly seated, the liner hanger assembly 100 should remain connected with the third and fourth threaded portions 210C and 129C and the connection sub 122 and the connection sleeve 124 as shown in FIG. 5. By rotating the mandrel 110, the first threaded portion 220F can be separated from the second threaded portion 141F. Meanwhile, as shown in fig. 6, as the mandrel 110 rotates, the third screw portion 210C of the tie-back cylinder 210 and the fourth screw portion 129C of the first screw member 129 unscrew from each other. This is because the first threaded member 129, the connection sleeve 124, and the connection fitting 122 can remain circumferentially fixed relative to the mandrel 110, while the tieback barrel 210 can remain circumferentially fixed relative to the hanger body 220. Through this process, the connection sleeve 124, the connection joint 122, and the connection sleeve fixing block 123 together move upward a distance with respect to the mandrel 110, and thus move upward a distance with respect to the extension sleeve 126, so that the extension sleeve 126 moves away from the inside of the connection sleeve fixing block 123. The connecting sleeve retainer block 123 is movable radially inward to disengage from the retainer block receiving slot 124B. Thus, the connection joint 122 may be separated with respect to the connection sleeve 124. Thereafter, the running tool 100 or the main components of the running tool 100 including the hitch drive 130 may be retrieved to the surface by lifting the mandrel 110.
That is, regardless of whether the setting is successful, the operator may effect the release and retrieval of the running tool 100 by a simple rotation and lifting action.
Fig. 7-10 show a second embodiment of a liner hanger assembly 1000. The structure of this second embodiment is similar to that of the first embodiment, so that the description of the first embodiment applies to the second embodiment if there is no explicit explanation or contradiction. The first embodiment differs from the second embodiment in structure as follows.
As shown in fig. 7, a joint limiting hole penetrating the connection joint 122 in the radial direction is configured at the lower end of the connection joint 122. A second screw member 123' is provided in the joint limiting hole. The outer side wall of the second screw member 123' is configured with a sixth screw portion 123H. A fifth screw portion 124H is configured inside the upper end of the connection sleeve 124. In the initial state, the second screw member 123' is sandwiched between the extension sleeve 126 and the connection sleeve 124 in the radial direction. At this time, the fifth screw portion 124H is engaged with the sixth screw portion 123H.
In addition, the coupling joint 122 and the coupling sleeve 124 do not need to be provided with the coupling joint anti-rotation groove 122D and the coupling sleeve anti-rotation teeth 124D.
Further, a fixing block receiving hole 124I penetrating the connection sleeve 124 in the radial direction is configured at the lower end of the connection sleeve 124. A tieback cylinder fixing block 129' is provided in the fixing block receiving hole 124I. Accordingly, as shown in fig. 8, a fixed block receiving groove 210I is configured inside the upper end of the tieback cylinder 201. The block receiving aperture 124I matches the shape of the tieback cylinder block 129 'to limit the circumferential and axial movement of the tieback cylinder block 129'. In addition, the block receiving slot 210I may be configured as an annular groove that matches the shape of the tieback cylinder block 129 'to limit axial movement of the tieback cylinder block 129'. Accordingly, at least one (preferably a plurality of) hanger anti-rotation grooves 124J extending in the longitudinal direction are configured at the lower end of the connection sleeve 124; at the upper end of the tieback cylinder 210, at least one (preferably a plurality of) hanger anti-rotation teeth extending in the longitudinal direction are configured. The relative rotation of the tie-back barrel 210 and the connecting sleeve 124 is limited by the engagement of the hanger anti-rotation slots 124J and hanger anti-rotation teeth.
In the initial state, the body of the support sleeve 128 is inside the tieback cylinder fixing block 129 'so that the tieback cylinder fixing block 129' can extend radially outward into the fixing block receiving groove 210I of the tieback cylinder 210. When the support sleeve 128 is moved upwardly relative to the connection sleeve 124, the reduced outer diameter portion 128I of the support sleeve 128 opposes the tieback cylinder securing block 129 'to permit the tieback cylinder securing block 129' to move radially inwardly out of the securing block receiving slot 210I.
Alternatively, the anchor block receiving slot 210I may be configured to match the shape of the tieback cylinder anchor block 129 'to limit axial and circumferential movement of the tieback cylinder anchor block 129'. In this case, the hanger anti-rotation groove 124J and hanger anti-rotation teeth may be omitted.
In the initial state and the normal seated and released state, the first screw member 129 and the tie-back cylinder fixing block 129 'and the connection sleeve fixing block 123 and the second screw member 123' are not significantly different in function, and descriptions thereof may correspond to each other without contradiction.
In an abnormal sitting and hanging state, the second embodiment can realize releasing only by rotating the mandrel 110 by an operator, however, the matching relationship among the components is changed. Specifically, by rotating the mandrel 110, the first screw portion 220F can be separated from the second screw portion 141F. Meanwhile, as shown in fig. 9, as the mandrel 110 rotates, the fifth screw portion 124H of the connection sleeve 124 and the sixth screw portion 123H of the second screw member 123' unscrew from each other. This is because the second threaded member 123' and the connection fitting 122 can remain circumferentially fixed relative to the mandrel 110, while the tieback barrel 210 and the connection sleeve 124 can remain circumferentially fixed relative to the hanger body 220. Through this process, the connection joint 122 and the second screw member 123 'together move up a distance with respect to the mandrel 110 and thus up a distance with respect to the extension sleeve 126, such that the extension sleeve 126 is moved away from the inner side of the second screw member 123'. The second screw member 123' can be moved radially inward until the fifth screw portion 124H is separated from the sixth screw portion 123H. Thus, the connection joint 122 may be separated with respect to the connection sleeve 124. At this time, however, the tie-back barrel securing block 129' remains within the securing block receiving slot 210I.
Thereafter, as shown in fig. 10, the mandrel 110 may be lifted such that the piston cylinder 133 moves upward together, but the connecting sleeve 124 and the support sleeve 128 do not move upward as they have been separated. When the piston cylinder 133 moves upward into engagement with the lower end of the support sleeve 128, the support sleeve 128 may be urged to move upward together. At this time, the shear pin 127 shears, and the support sleeve 128 moves upward relative to the connecting sleeve 124 to a position where the reduced outer diameter portion 128I opposes the tieback cylinder fixing block 129', allowing the tieback cylinder fixing block 129' to move radially inward to be separated from the fixing block receiving groove 210I. Thereafter, the pull-up continues, and the running tool 100 or the main components of the running tool 100 including the hitch drive 130 may be retrieved to the surface.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. A running tool comprising:
a mandrel;
a sitting and hanging driving mechanism sleeved outside the mandrel;
a release mechanism connected to the lower end of the mandrel, the release mechanism comprising an outwardly facing second threaded portion configured to engage with a first threaded portion on a hanger body of a liner hanger, the second threaded portion configured to be non-rotatable relative to the mandrel; and
a connection mechanism configured to engage a tieback barrel of the liner hanger;
under normal sitting and hanging and abnormal sitting and hanging states, the mandrel of the running tool is rotated, so that the first threaded part of the hanger body can be separated from the second threaded part of the releasing mechanism, and the tieback cylinder can be separated from the connecting mechanism.
2. The running tool of claim 1, wherein the coupling mechanism comprises:
the connecting joint is sleeved outside the mandrel and is fixedly connected with the mandrel in a rotating way, and a joint limiting hole is formed in the side wall of the connecting joint;
the connecting sleeve is sleeved outside the mandrel, the upper end of the connecting sleeve extends upwards to cover at least one part of the outer side wall of the connecting joint along the axial direction, a fixed block receiving groove is formed in the inner side of the upper end of the connecting sleeve, and a threaded member receiving hole penetrating through the connecting sleeve along the radial direction is formed in the lower end of the connecting sleeve;
The connecting sleeve fixing block is arranged in the joint limiting hole; and
a first threaded member disposed within the threaded member receiving bore, an outer sidewall of the first threaded member configured with a fourth threaded portion for engagement with a third threaded portion on a tieback barrel of the liner hanger;
wherein in an initial state, the fixed block receiving groove is disposed opposite the joint limiting hole, the connection sleeve fixed block extends into the fixed block receiving groove to limit axial movement of the connection sleeve relative to the connection joint, the connection mechanism is further configured to limit rotational movement of the connection sleeve relative to the connection joint, and the third threaded portion engages with the fourth threaded portion to connect the connection sleeve with the tieback tube;
in an abnormal sitting and hanging state, the third threaded portion is separated from the fourth threaded portion by rotating the mandrel, so that the connecting sleeve is separated from the tieback cylinder.
3. The running tool of claim 2, wherein at least one connection joint anti-rotation groove extending in an axial direction is configured at a lower end of the connection joint, and at least one connection sleeve anti-rotation tooth extending in an axial direction is configured at an upper end of the connection sleeve, the rotational movement of the connection sleeve relative to the connection joint being limited by engagement of the connection sleeve anti-rotation tooth with the connection joint anti-rotation groove.
4. The running tool of claim 1, wherein the coupling mechanism comprises:
the connecting joint is sleeved outside the mandrel and is fixedly connected with the mandrel in a rotating way, and a joint limiting hole is formed in the side wall of the connecting joint;
the connecting sleeve is sleeved outside the mandrel, the upper end of the connecting sleeve extends upwards to cover at least one part of the outer side wall of the connecting joint along the axial direction, a fifth thread part is formed on the inner side of the upper end of the connecting sleeve, and a fixed block receiving hole penetrating through the connecting sleeve along the radial direction is formed at the lower end of the connecting sleeve;
a second screw member provided in the joint limiting hole, an outer side wall of the second screw member being configured with a sixth screw portion for engagement with a fifth screw portion of the connection sleeve; and
a tieback cylinder fixing block arranged in the fixing block receiving hole;
wherein in an initial state, the fifth threaded portion engages with the sixth threaded portion to connect the connection sleeve and the connection fitting together, the fixed block receiving bore is disposed opposite a fixed block receiving slot on a tieback barrel of the liner hanger, the tieback barrel fixed block extends into the fixed block receiving slot to limit axial movement of the tieback barrel relative to the connection sleeve, the connection mechanism is further configured to limit rotational movement of the tieback barrel relative to the connection sleeve;
In an abnormal sitting and hanging state, the fifth thread part is separated from the sixth thread part by rotating the mandrel, so that the connecting sleeve connected with the tieback cylinder is separated from the connecting joint.
5. The running tool of claim 4, wherein the lower end of the connection sleeve is configured with at least one hanger anti-rotation slot extending in a longitudinal direction, the at least one hanger anti-rotation slot configured to engage with at least one hanger anti-rotation tooth extending in a longitudinal direction at an upper end of a tieback barrel of the liner hanger, limiting rotational movement of the tieback barrel relative to the connection sleeve.
6. A liner hanger comprising:
a tubular hanger body having a first threaded portion configured to be engageable with a second threaded portion of a running tool on an inner side thereof; and
the tieback cylinder is sleeved outside the hanger body, is configured to be unable to rotate relative to the hanger body and is configured to be engaged with a connection mechanism of the running tool;
the hanger body is provided with a first threaded portion and a second threaded portion, and the hanger body is provided with a connecting mechanism, wherein in a normal sitting and hanging state and an abnormal sitting and hanging state, the first threaded portion of the hanger body can be separated from the second threaded portion of the sending tool by rotating the sending tool, the tieback cylinder is separated from at least one part of the connecting mechanism, and the sending tool comprises a sitting and hanging driving mechanism.
7. The liner hanger of claim 6, wherein at least one hanger anti-rotation slot extending in an axial direction is configured on an outer sidewall of the hanger body;
the liner hanger further comprises:
the hanger connecting sleeve is sleeved outside the hanger body, the upper end of the hanger connecting sleeve is fixedly connected with the lower end of the tie-back cylinder, at least one hanger limiting hole is formed in the side wall of the hanger connecting sleeve, and each hanger limiting hole is arranged opposite to the corresponding hanger anti-rotation groove; and
and the hanger anti-rotation blocks are arranged in the hanger connecting through holes and extend into the hanger anti-rotation grooves, so that the tie-back barrel cannot rotate relative to the hanger body.
8. The liner hanger of claim 7, further comprising:
the anti-back sleeve is sleeved outside the hanger body, the upper end of the anti-back sleeve is fixedly connected with the hanger connecting sleeve, an anti-back piece is arranged between the anti-back sleeve and the hanger body, and the anti-back piece is configured to only allow the anti-back sleeve to move downwards relative to the hanger body in the axial direction;
The outer side surface of the lower end of the taper sleeve forms an inclined surface;
the slip connecting sleeve is sleeved outside the hanger body and connected with the hanger body through a hanger shearing pin, and the slip connecting sleeve is spaced from the taper sleeve in the axial direction; and
the slips are sleeved outside the hanger body, the slips are positioned between the taper sleeve and the slip connecting sleeve, the lower ends of the slips are hinged with the upper ends of the slip connecting sleeve, and the upper ends of the slips are free ends;
wherein setting is achieved by relative movement of the drogue relative to the slips towards each other such that the slips move onto the inclined faces of the drogue.
9. A liner hanger according to any one of claims 6 to 8, wherein a third threaded portion is configured on an inner side wall of the upper end of the tieback barrel, the third threaded portion being configured to engage with a fourth threaded portion of a connection mechanism of the setting tool;
wherein the first threaded portion on the hanger body and the third threaded portion on the tieback barrel have the same rotational direction such that the first threaded portion and the second threaded portion and the third threaded portion and the fourth threaded portion can be simultaneously separated by rotating the running tool.
10. A liner hanger according to any one of claims 6 to 8, wherein an upper end of the tieback barrel is configured with at least one hanger anti-rotation tooth extending in an axial direction, the at least one hanger anti-rotation tooth being configured to cooperate with at least one hanger anti-rotation slot extending in a longitudinal direction on a connection of the running tool to limit rotational movement of the tieback barrel relative to at least a portion of the running tool;
the inner side of the upper end of the tieback cylinder is also provided with a fixed block receiving groove which is used for receiving a tieback cylinder fixed block in a connecting mechanism of the running tool so as to limit the axial movement of the tieback cylinder relative to the connecting mechanism.
11. A liner hanger assembly comprising a running tool according to any one of claims 1 to 5 and a liner hanger according to any one of claims 6 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011023091.2A CN114427363B (en) | 2020-09-25 | 2020-09-25 | Setting tool, liner hanger and liner hanger assembly comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011023091.2A CN114427363B (en) | 2020-09-25 | 2020-09-25 | Setting tool, liner hanger and liner hanger assembly comprising same |
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| Publication Number | Publication Date |
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| CN114427363A CN114427363A (en) | 2022-05-03 |
| CN114427363B true CN114427363B (en) | 2024-04-12 |
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| CN202011023091.2A Active CN114427363B (en) | 2020-09-25 | 2020-09-25 | Setting tool, liner hanger and liner hanger assembly comprising same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118564207A (en) * | 2023-02-28 | 2024-08-30 | 中国石油化工股份有限公司 | Intelligent control liner hanger and use method thereof |
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