CN115596387A - Recyclable hydraulic type tail pipe hanger and sitting and hanging hydraulic transmission control method thereof - Google Patents
Recyclable hydraulic type tail pipe hanger and sitting and hanging hydraulic transmission control method thereof Download PDFInfo
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- CN115596387A CN115596387A CN202211287218.0A CN202211287218A CN115596387A CN 115596387 A CN115596387 A CN 115596387A CN 202211287218 A CN202211287218 A CN 202211287218A CN 115596387 A CN115596387 A CN 115596387A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 121
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 230000000903 blocking effect Effects 0.000 claims description 101
- 239000007788 liquid Substances 0.000 claims description 43
- 210000004907 gland Anatomy 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/0411—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion specially adapted for anchoring tools or the like to the borehole wall or to well tube
Abstract
The invention provides a recyclable hydraulic liner hanger and a sitting and hanging hydraulic transmission control method thereof, wherein the liner hanger comprises a sitting and hanging mechanism and a hydraulic transmission control mechanism, the sitting and hanging mechanism comprises a central pipe and other sitting and hanging components, the upper end of the central pipe is connected with an upstream tool string, the lower end of the central pipe is connected with a liner, the other sitting and hanging components are sequentially sleeved on the central pipe, the hydraulic transmission control mechanism is integrally arranged in the sitting and hanging mechanism and is provided with a cement injection sealing pipe, a temporary plugging seat outer sealing pipe and a temporary plugging ball seat, an annular space is formed between the cement injection sealing pipe and the central pipe, and the temporary plugging ball seat is arranged in the temporary plugging seat outer sealing pipe. The timely hanging of the recyclable hydraulic liner hanger is controlled by the hanging hydraulic transmission control method. The invention has the advantages that: the annular space can be dredged by starting a pump and circulating with large discharge capacity in the casing running process, and the hanger can be prevented from being hung in advance.
Description
Technical Field
The invention relates to the technical field of oil field drilling and completion operation, in particular to a recyclable hydraulic liner hanger and a sitting and hanging hydraulic transmission control method thereof.
Background
The tail pipe hanger is a downhole tool for hanging a tail pipe on the inner wall of an upper casing pipe, is widely applied to well cementation of deep wells and ultra-deep wells, and is a necessary and key downhole tool in the construction of oil field drilling and completion operations. In the process of putting a tail pipe and a tail pipe hanger into the well, a pump needs to be started to circulate to dredge the annulus. In the process of circularly dredging the annular space, part of circulating pressure acts on a hydraulic cylinder of a hanger, so that a shear pin of the hydraulic cylinder is cut off in advance, the hanger is hung in advance, the pressure needs to be finely controlled in the circulating process to be always below a certain value, the circulating discharge capacity is limited, the expected circulating effect cannot be achieved, and the casing running is difficult. Aiming at the problem, in order to ensure that the casing is smoothly put in and prevent the hanger from being hung in advance, the recyclable hydraulic liner hanger and the hanging hydraulic transmission control method thereof are designed, so that the bottom of the well can be dredged normally in a circulating manner, the hanger cannot be hung in advance, the construction operation is ensured to be smooth, and the application of the liner hanger is more reliable.
The application numbers are: CN201610900228.5, the name "liner hanger" discloses a liner hanger, the liner hanger includes inner tube and the slips subassembly of installing on the surface of inner tube, form hydraulic pressure chamber between slips subassembly and the inner tube, be constructed on the lateral wall of inner tube and pass the pressure hole with the inner chamber intercommunication of inner tube, the plugging device carries out shutoff or skew to passing the pressure hole to control passing the intercommunication or the disconnection of pressure hole, the plugging device outer wall axial is provided with two spaced-apart sealing washers, the sealing washer is in passing both sides or the homonymy in pressure hole according to different conditions, carries out further sealing to the pressure. When liquid in the inner pipe is pressurized, the pressure can be transmitted to the hydraulic cavity through the pressure transmitting hole, and then the slip assembly is driven to move, so that the liner hanger is hung. The control of the setting and hanging of the liner hanger can be realized by controlling the plugging or the deviation of the plugging device to the pressure transfer hole. Be different from this technical scheme, the technical scheme of this application is when sitting and hanging, can control the latus rectum size of stifled ball seat temporarily as required and pass through for temporarily stifled ball to still can make temporarily stifled ball seat reconversion after through, change operating condition again.
Disclosure of Invention
The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, it is an object of the present invention to provide a recyclable hydraulic liner hanger, and it is another object of the present invention to provide a ride hydraulic transmission control method.
In order to achieve the above object, the present invention provides, in one aspect, a circulatable hydraulic liner hanger including a hanger setting mechanism and a hydraulic transmission control mechanism, wherein,
the hanger hanging mechanism comprises a hanger central pipe, a hanger cone, a hanging slip, a hydraulic cylinder and a hydraulic cylinder starting shear pin, wherein the upper end of the hanger central pipe is fixedly and hermetically connected with the lower end of an upstream tool pipe string of the recyclable hydraulic tail pipe hanger, and the lower end of the hanger central pipe is fixedly and hermetically connected with the upper end of a tail pipe;
the hanger cone, the sitting and hanging slips and the hydraulic cylinder are sequentially sleeved on the hanger central pipe, wherein the hanger cone and the hanger central pipe are fixedly arranged, and conical surfaces of the hanger cone and the hanger central pipe are downward; the hydraulic cylinder is connected with a central pipe of the hanger; the hydraulic cylinder starts a shear pin to fix the hydraulic cylinder and the central tube of the hanger; one end of the sitting and hanging clamping tile is fixed or contacted with the hydraulic cylinder, the other end of the sitting and hanging clamping tile is contacted with the conical surface of the conical body of the hanger, and a hydraulic cylinder liquid inlet channel is radially arranged on the central tube of the hanger;
the hydraulic cylinder pressure transmission control mechanism is integrally arranged in the hanger setting and hanging mechanism and comprises a cementing sealing pipe, an upper sealing sleeve, a temporary plugging seat outer sealing pipe, a temporary plugging ball seat and a lower sealing sleeve, wherein,
the cementing sealing pipe and the hanger central pipe are coaxially arranged, and an annulus is formed between the outer wall of the cementing sealing pipe and the inner wall of the hanger central pipe;
the upper end of the temporary plugging seat outer sealing pipe and the lower end of the cementing sealing pipe are coaxially and hermetically arranged;
a side hole is radially arranged on the outer sealing pipe of the temporary plugging seat;
the temporary plugging ball seat is arranged in the temporary plugging seat outer sealing pipe, the upper end of the temporary plugging ball seat enters the middle of the lower end of the cementing sealing pipe, and the lower end of the temporary plugging ball seat is fixedly arranged with the inner wall of the temporary plugging seat outer sealing pipe to seal the side hole;
the upper sealing sleeve is arranged in the annular space to seal the upper end of the annular space;
the lower sealing sleeve is sleeved on the temporary plugging seat outer sealing pipe, and the lower end of the annular space is closed.
In an exemplary embodiment of an aspect of the present invention, the side hole may include a plurality of openings radially disposed along the outer sealing tube of the temporary plugging seat and located on the same cross-section.
In an exemplary embodiment of an aspect of the present invention, a shear groove may be circumferentially provided on an outer wall of a lower end of the temporary plugging ball seat, and one end of the temporary plugging ball seat shear pin may be disposed in a portion of the plurality of holes and the other end may be disposed in the shear groove.
In one exemplary embodiment of an aspect of the invention, the lower gland may comprise a temporary blocking gland and a temporary blocking gland housing, wherein,
the inner wall of the temporary blocking sealing sleeve and the outer wall of the temporary blocking seat outer sealing pipe are arranged in a sealing manner, and the outer wall of the temporary blocking sealing sleeve and the inner wall of the temporary blocking sealing sleeve shell are arranged in a sealing manner;
the outer wall of the temporary blocking sealing sleeve shell and the inner wall of the central pipe of the hanger can be arranged in a sealing mode, the temporary blocking sealing sleeve shell can be provided with limiting steps, the limiting steps on the inner wall can be used for limiting the temporary blocking sealing sleeve to move downwards, and the limiting steps on the outer wall can be used for being in contact with the inner wall of the central pipe of the hanger to limit the temporary blocking sealing sleeve to move downwards.
In an exemplary embodiment of an aspect of the invention, a ball seat outer sleeve may be further disposed between the connecting ends of the cement injection sealing pipe and the temporary plugging seat outer sealing pipe, an outer wall of the ball seat outer sleeve and an inner wall of the temporary plugging seat outer sealing pipe may be coaxially and sealingly engaged, when the temporary plugging ball seat shrinks, the ball seat outer sleeve may fix an upper end of the temporary plugging ball seat in an inner wall thereof, and the temporary plugging ball seat may be restricted to maintain the temporary plugging ball seat in a shrunk state.
In an exemplary embodiment of one aspect of the invention, the outer wall of the temporary plugging sealing sleeve and the inner wall of the hanger central pipe can be coaxially matched in a sealing mode, and liquid is prevented from entering between the hanger central pipe and the temporary plugging seat outer sealing pipe from the lower end of the hydraulic cylinder pressure transmission control mechanism.
In an exemplary embodiment of an aspect of the invention, the temporary blocking ball seat may include an upper temporary blocking portion, a middle temporary blocking portion, and a lower temporary blocking portion, which are connected in sequence, and the upper temporary blocking portion and the middle temporary blocking portion may be resiliently restored, wherein,
the upper temporary blocking part is configured into a split structure, and the split structure can be in a complete ball seat shape after being folded;
the folding or expanding state of the temporary blocking part in the middle part can be hollow, and liquid can radially permeate to the inner wall of the outer sealing pipe of the temporary blocking seat through the hollow part;
can circumference be provided with shear groove and seal groove on the stifled partial outer wall of lower part temporarily, the seal groove can be set up to sealed hydraulic cylinder inlet channel, and the shear groove can be configured to and temporarily blocks the trompil cooperation installation on the outer sealed pipe of seat temporarily and temporarily blocks up ball seat shear pin.
In an exemplary embodiment of an aspect of the invention, when the temporary plugging ball seat is assembled into the inner wall of the ball seat outer sleeve, the temporary plugging ball seat may be shaped as a conical tube, the inner diameters of the upper temporary plugging portion, the middle temporary plugging portion and the lower temporary plugging portion of the temporary plugging ball seat may sequentially increase, the minimum inner diameter of the conical tube may be smaller than the inner diameter of the temporary plugging ball, when the upper temporary plugging portion is separated from the inner wall of the ball seat outer sleeve, the upper temporary plugging portion and the middle temporary plugging portion may reset and expand, the outer wall of the upper temporary plugging portion may cling to the inner wall of the outer sealing tube of the temporary plugging seat, and the temporary plugging ball seat is still in a closed state due to the restriction of the outer sealing tube of the temporary plugging seat, and the inner diameters of the temporary plugging ball seat may be uniform.
In another aspect of the present invention, a sitting and hanging hydraulic transmission control method using the recyclable hydraulic liner hanger as described in any one of the above is provided, comprising the steps of:
connecting the upper end of the hanger setting mechanism and the upstream tool pipe string to a wellhead, and connecting the lower end of the hanger setting mechanism and the tail pipe to a well bottom to form a complete tool pipe string;
when the circulation dredging annulus is needed, liquid is injected from a wellhead, the cement injection sealing pipe discharges the liquid to the bottom of the well to dredge the annulus in a positive circulation mode, and the circulation discharge capacity in the circulation process is set according to the field requirements and is not limited by pressure.
In an exemplary embodiment of another aspect of the present invention, the sitting hydraulic power transmission control method may further include the steps of:
when the hanger needs to be hung, the temporary plugging ball can be thrown into the tool pipe string above the hanger, liquid is circularly injected from a wellhead to push the temporary plugging ball, and the temporary plugging ball is pushed to the position of the minimum inner diameter of the conical pipe body at the upper end of the temporary plugging ball seat;
the inner diameter of the temporary blocking ball is larger than the minimum inner diameter of the conical pipe body of the temporary blocking ball seat, the temporary blocking ball cannot pass through the temporary blocking ball, the pressure of liquid in the pipe column above the temporary blocking ball rises, and when the preset pressure is reached, the shearing nail of the temporary blocking ball seat is sheared off, and the temporary blocking ball seat is pushed to drive the temporary blocking ball to move downwards;
when the outer wall of the upper end of the temporary blocking ball seat descends to the position completely separated from the inner wall of the ball seat outer sleeve, the upper end of the temporary blocking ball seat loses radial control, the temporary blocking part at the upper part and the temporary blocking part at the middle part of the temporary blocking ball seat can rebound and reset, the outer wall of the temporary blocking ball seat is tightly attached to the inner wall of the outer sealing pipe of the temporary blocking ball seat after resetting, the outer diameter of the temporary blocking ball is smaller than the drift diameter of the temporary blocking ball seat, and the temporary blocking ball passes through the temporary blocking ball seat and continues to descend;
when the temporary plugging ball seat is pushed to descend at the upper end of the temporary plugging ball seat, the whole temporary plugging ball seat can also descend simultaneously, the plugging of a side hole on the inner wall of a sealing pipe of the temporary plugging seat is removed, and liquid enters an annular space between a central pipe of the hanger and an outer sealing pipe of the temporary plugging seat through the side hole and enters a liquid inlet channel of the liquid cylinder; and (3) continuing pressurizing the shaft after the liquid inlet channel of the hydraulic cylinder recovers, starting a shear pin to cut off the hydraulic cylinder when a preset pressure value is reached, starting a hanger sitting and hanging function, pushing the hydraulic cylinder to drive the sitting and hanging slip to ascend along the conical surface of the hanger cone together, realizing radial expansion and movement of the slip, and completing tail pipe sitting and hanging.
Compared with the prior art, the beneficial effects of the invention comprise at least one of the following:
(1) Before the hanger is hung, the hydraulic transmission control mechanism temporarily blocks a liquid inlet channel of the hydraulic cylinder, so that the normal circulation dredging of the annular space before the hanger is hung is met, and the discharge capacity can be not limited;
(2) When the hanger is hung, the hydraulic transmission control structure is provided with a liquid inlet channel capable of opening the hydraulic cylinder, the hydraulic cylinder of the hanger is transmitted to realize hanging, the hanger is prevented from being hung in advance, and the purpose of smoothly putting in the casing is achieved.
Drawings
The above and other objects and/or features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows a schematic of the overall construction of a recyclable hydraulic liner hanger according to an exemplary embodiment of the present invention;
FIG. 2 illustrates a schematic structural view of a hanger sitting and hanging mechanism in accordance with an exemplary embodiment of the present invention;
FIG. 3 is a structural diagram illustrating an initial state of a hydraulic cylinder pressure transmission control mechanism according to an exemplary embodiment of the present invention;
FIG. 4 is a structural schematic diagram illustrating an open state of a hydraulic cylinder pressure transmission control mechanism in accordance with an exemplary embodiment of the present invention;
FIG. 5 illustrates a schematic view of a temporary plug seat outer seal tube according to an exemplary embodiment of the present invention;
fig. 6 shows a cross-sectional view along the direction F-F of fig. 5.
The main reference numbers:
1-hanger setting and hanging mechanism, 11-hanger central pipe, 12-hanger cone, 13-setting and hanging slip, 14-hydraulic cylinder, 15-hydraulic cylinder starting shear pin, 2-hydraulic cylinder pressure transmission control mechanism, 21-cementing seal pipe, 22-upper sealing sleeve, 23-ball seat outer sleeve, 24-temporary plugging seat outer seal pipe, 241-side hole, 25-temporary plugging ball seat, 251-upper temporary plugging part, 252-middle temporary plugging part, 253-lower temporary plugging part, 26-temporary plugging ball seat shear pin, 27-temporary plugging seal sleeve, 28-temporary plugging seal sleeve shell and 29-shear groove.
Detailed Description
Hereinafter, a recyclable hydraulic liner hanger and a setting hydraulic transmission control method thereof of the present invention will be described in detail with reference to exemplary embodiments.
It should be noted that "first," "second," and the like are merely for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance. "upper," "lower," "inner," and "outer" are merely for convenience of description and relative orientation or positional relationship, and do not indicate or imply that the referenced components must have that particular orientation or position.
FIG. 1 shows a schematic of the overall construction of a recyclable hydraulic liner hanger in accordance with an exemplary embodiment of the present invention; FIG. 2 illustrates a schematic structural view of a hanger sitting and hanging mechanism in accordance with an exemplary embodiment of the present invention; FIG. 3 is a schematic structural diagram illustrating an initial state of a hydraulic cylinder pressure transmission control mechanism according to an exemplary embodiment of the present invention; FIG. 4 is a structural schematic diagram illustrating an open state of a hydraulic cylinder pressure transmission control mechanism in accordance with an exemplary embodiment of the present invention; FIG. 5 illustrates a schematic view of a temporary plug seat outer seal tube according to an exemplary embodiment of the present invention; fig. 6 shows a cross-sectional view along the direction F-F of fig. 5.
In a first exemplary embodiment of the present invention, as shown in fig. 1, the circulatable hydraulic liner hanger includes a hanger setting mechanism 1 and a cylinder pressure transmission control mechanism 2.
As shown in fig. 2, the hanger setting mechanism includes a hanger center tube 11, a hanger cone 12, a setting slip 13, a hydraulic cylinder 14, and a hydraulic cylinder activation shear pin 15. The hanger central tube is connected with an upstream tool tube of the circulating hydraulic liner hanger in a fixed and sealed mode at a well head, and the lower end of the hanger central tube is connected with the upper end of a liner in a fixed and sealed mode to achieve connection with the well bottom.
Furthermore, the hanger cone, the hanging slips and the hydraulic cylinder are sequentially sleeved on the hanger central pipe. The hanger cone is fixedly and hermetically connected with the hanger central tube, and the conical surface of the hanger cone faces downwards.
Further, the hydraulic cylinder is connected with the central pipe of the hanger. The hydraulic cylinder and the hanger central pipe are provided with fixing holes at corresponding positions, and the hydraulic cylinder starting shear pin is fixed in the fixing holes on the hydraulic cylinder and the hanger central pipe.
Furthermore, one end of the sitting and hanging slip is fixedly connected or contacted with the hydraulic cylinder, and the other end of the sitting and hanging slip is contacted with the conical surface of the cone of the hanger.
Furthermore, a hydraulic cylinder liquid inlet channel is arranged on the outer wall of the central pipe of the hanger and communicated with the hydraulic cylinder.
Further, as shown in fig. 1, a hydraulic cylinder pressure transmission control mechanism 2 is integrally provided in the hanger setting mechanism 1. As shown in fig. 3 or 4, the hydraulic cylinder pressure transmission control mechanism includes a cementing seal pipe 21, an upper seal gland 22, a temporary seal seat outer seal pipe 24 and a lower seal gland.
Furthermore, the cementing seal pipe and the hanger central pipe are coaxially arranged. An annular space is formed between the outer wall of the cementing seal pipe and the inner wall of the hanger central pipe. The inner diameter of the cementing seal pipe is smaller than the inner diameter of the central pipe of the hanger.
Furthermore, the upper end of the outer sealing pipe of the temporary plugging seat and the lower end of the cementing sealing ring are coaxially and hermetically arranged. As shown in fig. 5 and 6, a side hole 241 is radially arranged on the temporary plugging seat outer sealing pipe 24.
Furthermore, the temporary plugging ball seat is arranged in the temporary plugging seat outer sealing pipe. The upper end of the temporary plugging ball seat enters the lower end of the cementing sealing pipe. The lower end of the temporary plugging ball seat is fixed with the inner wall of the outer sealing pipe of the temporary plugging seat through a temporary plugging ball seat shear pin to seal the side hole.
Furthermore, an upper sealing sleeve is arranged in the annular space to seal the upper end of the annular space. The lower sealing sleeve is sleeved at one end of the temporary plugging seat outer sealing pipe to seal the lower end of the annular space.
In the present exemplary embodiment, as shown in fig. 3 or 4, the side hole may include a plurality of openings in a radial direction of the temporary plug seat outer sealing pipe 24, and the plurality of openings may be provided on the same cross section.
In the exemplary embodiment, as shown in fig. 3 or 4, a shear groove 29 may be formed at a lower end of an outer wall of the ball temporary plugging seat 25 in a circumferential direction. The temporary socket shear pin 26 may be disposed at one end in a portion of the plurality of openings. The other end may be disposed in the shear groove.
In the present exemplary embodiment, as shown in fig. 3 or 4, the lower gland may include a temporary blocking gland 27 and a temporary blocking gland housing 28. The inner wall of the temporary blocking sealing sleeve is fixedly connected with the outer wall of the temporary blocking seat outer sealing pipe 24 in a sealing mode, and the outer wall of the temporary blocking sealing sleeve is arranged in a sealing mode with the inner wall of the temporary blocking sealing sleeve shell. The outer wall of the temporary plugging seat outer sealing sleeve shell is hermetically arranged with the inner wall of the central tube of the hanger. The inner wall and the outer wall of the temporary blocking sealing sleeve shell can be provided with limiting steps, wherein the steps on the inner wall can be used for limiting the temporary blocking sealing sleeve to move downwards, and the limiting steps on the outer wall can be used for contacting with the inner wall of the central tube of the hanger to limit the temporary blocking sealing sleeve to move downwards.
In the present exemplary embodiment, as shown in fig. 3 or 4, a ball seat outer sleeve 23 may be provided between the connecting ends of the cementing seal pipe 21 and the temporary plugging seat outer seal pipe 24. The outer wall of the ball seat outer sleeve 23 can be coaxially and hermetically matched with the inner wall of the temporary plugging seat outer sealing pipe 24. After the temporary plugging ball seat 25 is contracted, the ball seat outer sleeve can limit and fix the upper end of the temporary plugging ball seat in the inner wall of the temporary plugging ball seat, so that the temporary plugging ball seat is kept in a contracted state.
In the present exemplary embodiment, as shown in fig. 3 or 4, the blocking ball seat may include an upper blocking portion 251, a middle blocking portion 252, and a lower blocking portion 253, which are connected in sequence. Further, the upper temporary blocking part can be arranged into a valving structure. As shown in fig. 3, the split structure can be folded to form a complete ball seat structure.
Furthermore, the temporary middle blocking part is hollowed out in a folded or expanded state. Liquid can radially permeate to the inner wall of the outer sealing pipe of the temporary plugging sealing seat through the hollow part.
Further, as shown in fig. 3 or 4, a shear groove 29 and a sealing groove may be circumferentially disposed on the outer wall of the lower temporary plugging portion. The seal groove can be used for temporarily blocking a liquid inlet channel of the liquid cylinder. The shear groove can be used for fixing the temporary plugging ball seat shear pin.
Furthermore, the position of the temporary plugging ball seat shear pin corresponds to the position of the side hole 241, and the position of the liquid inlet channel of the hydraulic cylinder corresponds to the position of the sealing groove.
Furthermore, the temporary blocking part at the upper part and the temporary blocking part at the middle part can rebound and reset.
In this example embodiment, the temporary tee is secured in the interior wall of the tee housing as shown in fig. 3. The temporary plugging ball seat can be a conical tubular structure. At the moment, the inner diameters of the upper temporary blocking part, the middle temporary blocking part and the lower temporary blocking part are sequentially increased. The minimum inner diameter of the conical pipe body is smaller than the diameter of the temporary plugging ball. As shown in figure 4, after the upper temporary blocking part is separated from the limit of the inner wall of the ball seat outer sleeve, the upper temporary blocking part and the middle temporary blocking part are reset and expanded. At this time, the outer wall of the temporary plugging part at the upper part is tightly attached to the inner wall of the outer sealing pipe 24 of the temporary plugging seat. The temporary plugging seat external sealing pipe 24 limits the temporary plugging ball seat 25, so that the temporary plugging ball seat is still in a folded state. The inner diameters of the temporary plugging ball seats after reset and expansion are consistent.
In a second exemplary embodiment of the present invention, the sitting hydraulic transmission control method is implemented by the circulatable hydraulic liner hanger described in the first exemplary embodiment above, the sitting hydraulic transmission control method including the steps of:
and connecting the upper end of the hanger setting and hanging mechanism and the lower end of the upstream tool pipe string to a wellhead, and connecting the lower end of the hanger setting and hanging mechanism and a tail pipe to a well bottom to form a complete tool pipe string in a combined manner.
When circulation dredging annular space is needed, liquid is injected from a wellhead, and the cement injection sealing pipe discharges the liquid to the bottom of the well so as to dredge the annular space in a positive circulation mode. The size of the circulating displacement in the circulating process can be set according to the field requirement and is not limited by pressure.
In the present exemplary embodiment, the sitting-hanging hydraulic transmission control method may further include the steps of:
when the hanger needs to be hung, the temporary plugging ball is put into the tool pipe string above the hanger, and liquid is circularly injected into the wellhead to push the temporary plugging ball to the minimum inner diameter position of the conical tubular structure of the temporary plugging ball seat.
The inner diameter of the temporary blocking ball is larger than the minimum inner diameter of the conical tubular structure of the temporary blocking ball seat, and the temporary blocking ball seat can limit the movement of the temporary blocking ball at the moment.
The liquid pressure in the conical tubular structure of the temporary plugging ball seat above the temporary plugging ball rises, but when the liquid pressure reaches a preset pressure value, the shearing nail of the temporary plugging ball seat is sheared off, and the temporary plugging ball seat is pushed to drive the temporary plugging ball to move downwards.
When the inner wall of the upper end of the temporary plugging ball seat moves downwards to be completely separated from the inner wall of the ball seat outer sleeve, the upper end of the temporary plugging ball seat loses radial control, the temporary plugging part at the upper part and the temporary plugging part at the middle part of the temporary plugging ball seat are expanded and reset, the outer wall of the temporary plugging ball seat after reset is tightly attached to the inner wall of the temporary plugging seat outer sealing pipe, the inner diameters of the temporary plugging part at the upper part, the temporary plugging part at the middle part and the temporary plugging part at the lower part are consistent, the outer diameter of the temporary plugging ball is smaller than the inner diameter of the temporary plugging ball seat at the moment, and the temporary plugging ball can pass through the temporary plugging ball seat and continue to move downwards.
When the temporary plugging ball is seated at the upper end of the temporary plugging ball seat and pushed to descend, the whole temporary plugging ball seat also descends simultaneously, after the temporary plugging ball seat integrally descends, the side hole in the wall of the temporary plugging seat outer sealing pipe is not plugged, and liquid flows to an annulus between the hanger central pipe and the temporary plugging seat outer sealing pipe through the side hole and enters a liquid cylinder liquid inlet channel. And (3) continuing pressurizing the shaft after the liquid inlet channel of the hydraulic cylinder recovers, starting a shear pin to cut off the hydraulic cylinder when the pressure is increased to a preset pressure value, starting a hanging function of the hanger, pushing the hydraulic cylinder to drive the hanging clamping tiles to move upwards along the conical surface of the cone of the hanger together, realizing radial expansion movement of the hanging clamping tiles, and completing tail pipe hanging.
In summary, the advantages of the present invention can include at least one of the following:
(1) The hydraulic cylinder pressure transmission control mechanism designed by the invention controls the liquid inlet channel of the hydraulic cylinder to be temporarily blocked in the running process of the casing, thereby not only protecting a shear pin of the hydraulic cylinder from being accidentally sheared, effectively preventing a hanger from being hung in advance, but also ensuring the normal circulation of liquid in a shaft;
(2) When the sleeve is put in place and the hanger needs to be hung, the temporary plugging seat can be pushed to descend through the pressure build-up by throwing the ball, so that the liquid inlet channel of the hydraulic cylinder can be restored, the pressure transmission is completed, the hanger can be hung conveniently and efficiently after the subsequent normal pressure build-up construction.
Although a circulatable hydraulic liner hanger and a setting hydraulic transmission control method thereof of the present invention have been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope thereof as defined in the appended claims.
Claims (10)
1. A recyclable hydraulic liner hanger is characterized by comprising a hanger sitting and hanging mechanism and a hydraulic transmission control mechanism, wherein,
the hanger hanging mechanism comprises a hanger central pipe, a hanger cone, a hanging slip, a hydraulic cylinder and a hydraulic cylinder starting shear pin, wherein the upper end of the hanger central pipe is fixedly and hermetically connected with the lower end of an upstream tool pipe string of the recyclable hydraulic tail pipe hanger, and the lower end of the hanger central pipe is fixedly and hermetically connected with the upper end of a tail pipe;
the hanger cone, the sitting and hanging slips and the hydraulic cylinder are sequentially sleeved on the hanger central pipe, wherein the hanger cone and the hanger central pipe are fixedly arranged, and conical surfaces of the hanger cone and the hanger central pipe face downwards; the hydraulic cylinder is connected with the central pipe of the hanger; the hydraulic cylinder starts a shear pin to fix the hydraulic cylinder and the central tube of the hanger; one end of the sitting and hanging slip is fixed or contacted with the hydraulic cylinder, the other end of the sitting and hanging slip is contacted with the conical surface of the cone of the hanger, and a hydraulic cylinder liquid inlet channel is radially arranged on the central tube of the hanger;
the hydraulic cylinder pressure transmission control mechanism is integrally arranged in the hanger setting and hanging mechanism and comprises a cementing sealing pipe, an upper sealing sleeve, a temporary blocking seat outer sealing pipe, a temporary blocking ball seat and a lower sealing sleeve, wherein,
the cementing seal pipe and the hanger central pipe are coaxially arranged, and an annulus is formed between the outer wall of the cementing seal pipe and the inner wall of the hanger central pipe;
the upper end of the temporary plugging seat outer sealing pipe and the lower end of the cementing sealing pipe are coaxially and hermetically arranged;
a side hole is radially arranged on the outer sealing pipe of the temporary plugging seat;
the temporary plugging ball seat is arranged inside the temporary plugging seat outer sealing pipe, the upper end of the temporary plugging ball seat enters the lower end of the cementing sealing pipe, and the lower end of the temporary plugging ball seat outer sealing pipe is fixedly arranged on the inner wall of the temporary plugging seat outer sealing pipe through a temporary plugging ball seat shear pin to seal the side hole;
the upper sealing sleeve is arranged in the annular space to seal the upper end of the annular space;
the lower sealing sleeve is sleeved on the temporary plugging seat outer sealing pipe and seals the lower end of the annular space.
2. The circulatable hydraulic liner hanger of claim 1, wherein the lateral bore comprises a plurality of openings radially disposed along the temporary plug seat outer sealing tube and on the same cross-section.
3. The circulatable hydraulic liner hanger according to claim 2, wherein a shear groove is circumferentially provided on an outer wall of a lower end of the temporary plugging ball seat, and one end of the temporary plugging ball seat shear pin is disposed in a part of the plurality of openings, and the other end is disposed in the shear groove.
4. The circulatable hydraulic liner hanger of claim 1, wherein the lower sealing boot comprises a temporary blocking sealing boot and a temporary blocking sealing boot housing, wherein,
the inner wall of the temporary blocking sealing sleeve and the outer wall of the temporary blocking seat outer sealing pipe are arranged in a sealing mode, and the outer wall of the temporary blocking sealing sleeve and the inner wall of the temporary blocking sealing sleeve shell are arranged in a sealing mode;
the outer wall of the temporary blocking sealing sleeve shell and the inner wall of the central pipe of the hanger are arranged in a sealing mode, limiting steps are arranged on the temporary blocking sealing sleeve shell and used for limiting the temporary blocking sealing sleeve to move downwards, and the limiting steps on the outer wall are used for contacting with the inner wall of the central pipe of the hanger to limit the temporary blocking sealing sleeve to move downwards.
5. The recyclable hydraulic liner hanger as described in claim 1, wherein a ball seat outer sleeve is further provided between the connecting ends of the cement injection sealed pipe and the temporary plugging seat outer sealed pipe, the outer wall of the ball seat outer sleeve is coaxially and sealingly fitted with the inner wall of the temporary plugging seat outer sealed pipe, and when the temporary plugging ball seat shrinks, the ball seat outer sleeve fixes the upper end of the temporary plugging ball seat in the inner wall of the ball seat outer sleeve, and restricts the temporary plugging ball seat to keep the temporary plugging ball seat shrinking.
6. The circulatable hydraulic liner hanger according to claim 1, wherein the outer wall of the temporary blocking gland is coaxially and sealingly engaged with the inner wall of the hanger center tube, preventing liquid from entering between the hanger center tube and the temporary blocking seat outer sealing tube from the lower end of the hydraulic cylinder pressure transmission control mechanism.
7. The circulatable hydraulic liner hanger according to claim 1, wherein the temporary blocking ball seat comprises an upper temporary blocking portion, a middle temporary blocking portion and a lower temporary blocking portion connected in this order, the upper temporary blocking portion and the middle temporary blocking portion being capable of resilient return, wherein,
the upper temporary blocking part is configured into a split structure, and the split structure is in a complete ball seat shape after being folded;
the middle temporary blocking part is in a hollow state in a folded or expanded state, and liquid can radially permeate to the inner wall of the outer sealing pipe of the temporary blocking seat through the hollow part;
the temporary blocking part outer wall of the lower portion is circumferentially provided with a shearing groove and a sealing groove, the sealing groove is arranged to be a liquid inlet channel for sealing the temporary blocking outer sealing pipe, and the shearing groove is configured to be matched with a hole in the temporary blocking outer sealing pipe to install a temporary blocking ball seat shearing nail.
8. The recyclable hydraulic liner hanger as claimed in claim 7, wherein the temporary plugging ball seat is formed in a tapered tube shape when being fitted into the inner wall of the ball seat housing, the inner diameters of the upper temporary plugging portion, the middle temporary plugging portion and the lower temporary plugging portion of the temporary plugging ball seat are sequentially increased in size, the minimum inner diameter of the tapered tube body is smaller than the inner diameter of the temporary plugging ball, the upper temporary plugging portion and the middle temporary plugging portion are reset and expanded after the upper temporary plugging portion is separated from the inner wall of the ball seat housing, the outer wall of the upper temporary plugging portion is tightly attached to the inner wall of the outer sealing tube of the temporary plugging seat, and the temporary plugging ball seat is still in a folded state due to the restriction of the outer sealing tube of the temporary plugging seat at this time, and the inner diameters of the temporary plugging ball seat are uniform.
9. A sitting hanging hydraulic transmission control method, characterized in that the sitting hanging hydraulic transmission control method uses the circulatable hydraulic liner hanger according to any one of claims 1 to 8, the transmission control method comprising the steps of:
connecting the upper end of the hanger setting and hanging mechanism and an upstream tool pipe string to a wellhead, and connecting the lower end of the hanger setting and hanging mechanism and a tail pipe to a well bottom to form a complete tool pipe string;
when the circulation dredging annular space is needed, liquid is injected from a wellhead, the cement injection sealing pipe discharges the liquid to the bottom of the well to dredge the annular space in a positive circulation mode, and the size of the circulation discharge capacity in the circulation process is set according to the field needs and is not limited by pressure.
10. A sit-up hydraulic transfer control method as claimed in claim 9, further comprising the steps of:
when the hanger needs to be hung, the temporary plugging ball is thrown into the tool pipe string above the hanger, liquid is circularly injected from a wellhead to push the temporary plugging ball, and the temporary plugging ball is pushed to the position with the minimum inner diameter of the conical pipe body at the upper end of the temporary plugging ball seat;
the inner diameter of the temporary blocking ball is larger than the minimum inner diameter of the conical pipe body of the temporary blocking ball seat, the temporary blocking ball cannot pass through the temporary blocking ball, the pressure of liquid in the pipe column above the temporary blocking ball rises, and when the preset pressure is reached, the shearing nail of the temporary blocking ball seat is sheared off, and the temporary blocking ball seat is pushed to drive the temporary blocking ball to move downwards;
when the outer wall of the upper end of the temporary plugging ball seat descends to the position completely separated from the inner wall of the ball seat outer sleeve, the upper end of the temporary plugging ball seat loses radial control, the temporary plugging part at the upper part and the temporary plugging part at the middle part of the temporary plugging ball seat rebound and reset, the outer wall of the temporary plugging ball seat clings to the inner wall of an outer sealing pipe of the temporary plugging ball seat after reset, the outer diameter of the temporary plugging ball is smaller than the drift diameter of the temporary plugging ball seat, and the temporary plugging ball passes through the temporary plugging ball seat and continues to descend;
when the temporary plugging ball is pushed to descend at the upper end of the temporary plugging ball seat, the whole temporary plugging ball seat also descends simultaneously, the plugging of the side hole in the inner wall of the outer sealing pipe of the temporary plugging seat is removed, and liquid enters an annular space between the central pipe of the hanger and the outer sealing pipe of the temporary plugging seat through the side hole and enters a liquid inlet channel of the liquid cylinder; and (3) continuing pressurizing the shaft after the liquid inlet channel of the hydraulic cylinder recovers, starting a shear pin to cut off the hydraulic cylinder when a preset pressure value is reached, starting a hanger sitting and hanging function, pushing the hydraulic cylinder to drive the sitting and hanging slips to move upwards along the conical surface of a cone of the hanger together, realizing radial expansion and movement of the slips, and completing tail pipe sitting and hanging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211287218.0A CN115596387B (en) | 2022-10-20 | Recyclable hydraulic tail pipe hanger and sitting and hanging hydraulic transmission control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211287218.0A CN115596387B (en) | 2022-10-20 | Recyclable hydraulic tail pipe hanger and sitting and hanging hydraulic transmission control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115596387A true CN115596387A (en) | 2023-01-13 |
| CN115596387B CN115596387B (en) | 2024-04-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507836A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Drilling liner hanger and string type well cementing system comprising same |
| WO2017197608A1 (en) * | 2016-05-18 | 2017-11-23 | 思达斯易能源技术(集团)有限公司 | Tailpipe hanger assembly |
| CN107956442A (en) * | 2016-10-14 | 2018-04-24 | 中国石油化工股份有限公司 | Extension hanger |
| CN207715120U (en) * | 2017-12-28 | 2018-08-10 | 中国石油化工股份有限公司 | A kind of tail pipe well cementing pipe string |
| CN112227994A (en) * | 2019-07-15 | 2021-01-15 | 中国石油化工股份有限公司 | Tail pipe hanger preventing lifting forward and hanging |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507836A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Drilling liner hanger and string type well cementing system comprising same |
| WO2017197608A1 (en) * | 2016-05-18 | 2017-11-23 | 思达斯易能源技术(集团)有限公司 | Tailpipe hanger assembly |
| CN107956442A (en) * | 2016-10-14 | 2018-04-24 | 中国石油化工股份有限公司 | Extension hanger |
| CN207715120U (en) * | 2017-12-28 | 2018-08-10 | 中国石油化工股份有限公司 | A kind of tail pipe well cementing pipe string |
| CN112227994A (en) * | 2019-07-15 | 2021-01-15 | 中国石油化工股份有限公司 | Tail pipe hanger preventing lifting forward and hanging |
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