CN115596387B - Recyclable hydraulic tail pipe hanger and sitting and hanging hydraulic transmission control method thereof - Google Patents
Recyclable hydraulic tail pipe hanger and sitting and hanging hydraulic transmission control method thereof Download PDFInfo
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- CN115596387B CN115596387B CN202211287218.0A CN202211287218A CN115596387B CN 115596387 B CN115596387 B CN 115596387B CN 202211287218 A CN202211287218 A CN 202211287218A CN 115596387 B CN115596387 B CN 115596387B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 137
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 51
- 239000012466 permeate Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 description 15
- 238000010276 construction Methods 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer 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
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in 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 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
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a recyclable hydraulic tail pipe hanger and a hydraulic transmission control method for sitting and hanging the same, wherein the tail pipe 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 tail pipe, 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 cementing sealing pipe, a temporary plugging seat outer sealing pipe and a temporary plugging ball seat, an annulus is formed between the cementing sealing pipe and the central pipe, and the temporary plugging ball seat is arranged in the temporary plugging seat outer sealing pipe. The sitting-hanging hydraulic transmission control method controls the timely sitting-hanging of the recyclable hydraulic tail pipe hanger. The invention has the advantages that: the high-displacement circulating dredging device can not only open the pump to circularly dredge the annulus in the process of casing running, but also prevent the hanger from sitting and hanging in advance.
Description
Technical Field
The invention relates to the technical field of oilfield drilling and completion operations, in particular to a recyclable hydraulic tail pipe hanger and a sitting-hanging hydraulic transmission control method thereof.
Background
The tail pipe hanger is a downhole tool for hanging the tail pipe on the inner wall of an upper casing, 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 oilfield drilling and completion operations. In the well section with complex stratum, liner cementation is carried out, the conditions of well wall collapse, block falling, broken thick mud cakes and the like are common, and in the process of putting the liner and the liner hanger in, pump circulation is needed to dredge the annulus. In the process of circulating dredging annulus, partial circulating pressure acts on a hydraulic cylinder of a hanger, so that hydraulic cylinder shear pins can be cut off in advance, and the hanger is hung in advance, so that the fine control pressure is required to be always below a certain value in the circulating process, the circulating displacement is limited, the expected circulating effect is often not achieved, and the casing is difficult to put. To solve the problem, in order to ensure that the casing is smoothly put in and prevent the hanger from being hung in advance, a recyclable hydraulic tail pipe hanger and a hydraulic transmission control method for hanging the hanger are designed, so that the hanger can normally and circularly dredge the bottom of a well, and can not be hung in advance, thereby ensuring that the construction operation is smooth and ensuring that the tail pipe hanger is more reliably applied.
The application number is: CN201610900228.5, entitled "liner hanger" discloses a liner hanger, which comprises an inner pipe and a slip assembly mounted on the outer surface of the inner pipe, a hydraulic cavity is formed between the slip assembly and the inner pipe, a pressure transmission hole for communicating the hydraulic cavity with the inner cavity of the inner pipe is formed on the side wall of the inner pipe, the pressure transmission hole is blocked or deviated by a blocking device to control the communication or disconnection of the pressure transmission hole, two spaced sealing rings are axially arranged on the outer wall of the blocking device, and the sealing rings are positioned on two sides or the same side of the pressure transmission hole according to different conditions to further seal the pressure transmission. When the liquid in the inner pipe is pressurized, the pressure can be transmitted into the hydraulic cavity through the pressure transmission hole, and the slip assembly is driven to move, so that the liner hanger is hung. By controlling the plugging device to plug or offset the pressure transmission hole, the control of the liner hanger on the sitting and hanging of the liner hanger can be realized. Different from the technical scheme, the technical scheme of the application can control the size of the drift diameter of the temporary plugging ball seat according to the needs when the temporary plugging ball seat is hung, so that whether the temporary plugging ball passes or not can be controlled, and the temporary plugging ball seat can be restored to the original state after the temporary plugging ball seat passes, and the operating state can be changed.
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 a method of controlling on-hook hydraulic transmission.
In order to achieve the above object, the present invention provides, in one aspect, a recyclable hydraulic liner hanger including a hanger seating and hanging mechanism and a hydraulic transmission control mechanism, wherein,
The hanger sitting and hanging mechanism comprises a hanger central tube, a hanger cone, sitting and hanging slips, a hydraulic cylinder and a hydraulic cylinder starting shear pin, wherein the upper end of the hanger central tube is fixedly and hermetically connected with the lower end of an upstream tool tube string of the recyclable hydraulic tail tube hanger, and the lower end of the hanger central tube is fixedly and hermetically connected with the upper end of the tail tube;
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 the conical surface of the hanger cone faces downwards; the hydraulic cylinder is connected with the hanger central tube; 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 sitting 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,
The cementing sealing pipe and the central pipe of the hanger are coaxially arranged, and an annulus is formed between the outer wall of the cementing sealing pipe and the inner wall of the central pipe of the hanger;
The upper end of the temporary plugging seat outer sealing pipe is coaxially and hermetically arranged with the lower end of the cementing sealing pipe;
A side hole is radially arranged on the outer sealing tube 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 lower end of the cementing sealing pipe, and the lower end of the temporary plugging ball seat is fixedly arranged on the inner wall of the temporary plugging seat outer sealing pipe through a shear pin of the temporary plugging ball seat 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 outer sealing tube of the temporary plugging seat, and the lower end of the annulus is closed.
In an exemplary embodiment of an aspect of the invention, the side hole may include a plurality of openings radially disposed along the temporary plugging seat outer seal tube and located on the same cross section.
In an exemplary embodiment of an aspect of the invention, a shear groove may be circumferentially provided on an outer wall of a lower end of the temporary plugging ball seat, one end of the temporary plugging ball seat shear pin may be provided in a portion of the plurality of openings, and the other end may be provided in the shear groove.
In an exemplary embodiment of an aspect of the invention, the lower gland may include a temporary blocking gland and a temporary blocking gland housing, wherein,
The inner wall of the temporary plugging sealing sleeve and the outer wall of the temporary plugging seat outer sealing tube can be arranged in a sealing way, and the outer wall of the temporary plugging sealing sleeve and the inner wall of the temporary plugging sealing sleeve shell can be arranged in a sealing way;
The outer wall of the temporary plugging sealing sleeve shell and the inner wall of the central tube of the hanger can be arranged in a sealing way, limiting steps can be arranged on the temporary plugging sealing sleeve shell, the limiting steps on the inner wall can be used for limiting the temporary plugging 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 tube of the hanger to limit the downward movement of the temporary plugging sealing sleeve.
In an exemplary embodiment of an aspect of the invention, a ball seat jacket may be further disposed between the connection end of the cementing sealing pipe and the outer sealing pipe of the temporary plugging seat, and an outer wall of the ball seat jacket may be coaxially and sealingly engaged with an inner wall of the outer sealing pipe of the temporary plugging seat, and after the temporary plugging seat is contracted, the ball seat jacket may fix an upper end of the temporary plugging seat in an inner wall of the ball seat jacket, and limiting the temporary plugging seat may maintain the temporary plugging seat in a contracted 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 central tube of the hanger can be coaxially and hermetically matched, so that liquid is prevented from entering between the central tube of the hanger and the outer sealing tube of the temporary plugging seat from the lower end of the hydraulic cylinder pressure transmission control mechanism.
In one exemplary embodiment of an aspect of the invention, the temporary plugging ball seat may include an upper temporary plugging portion, a middle temporary plugging portion, and a lower temporary plugging portion connected in sequence, the upper temporary plugging portion and the middle temporary plugging portion being capable of rebound reset, wherein,
The upper temporary plugging part is configured into a split structure, and the split structure can be in a complete ball seat shape after being folded;
The middle temporary plugging part can be in a hollow state in a furled or expanded state, and liquid can radially permeate into the inner wall of the outer sealing tube of the temporary plugging seat through the hollow part;
the outer wall of the temporary plugging part at the lower part can be circumferentially provided with a shear groove and a seal groove, the seal groove can be arranged to seal a liquid inlet channel of the liquid cylinder, and the shear groove can be configured to be matched with an opening on a sealing tube outside the temporary plugging seat to install a temporary plugging ball seat shear pin.
In an exemplary embodiment of an aspect of the invention, when the temporary plugging ball seat is assembled in an inner wall of the ball seat outer sleeve, the temporary plugging ball seat may be formed into a tapered tube body, the inner diameters of the temporary plugging portion at the upper part, the temporary plugging portion at the middle part and the temporary plugging portion at the lower part of the temporary plugging ball seat may be sequentially increased, the minimum inner diameter of the tapered tube body may be smaller than the inner diameter of the temporary plugging ball, after the temporary plugging portion at the upper part is separated from the inner wall of the ball seat outer sleeve, the temporary plugging portion at the upper part and the temporary plugging portion at the middle part may be reset and expanded, the outer wall of the temporary plugging portion at the upper part may be tightly attached to the inner wall of the temporary plugging seat outer sealing tube, at this time, the temporary plugging ball seat may still be in a furled state due to the limitation of the temporary plugging seat outer sealing tube, and at this time, the inner diameters of the temporary plugging ball seat may be consistent.
Another aspect of the present invention provides a setting hydraulic transmission control method using the recyclable hydraulic liner hanger as described in any one of the above, comprising the steps of:
Connecting the upper end of the hanger sitting and hanging mechanism and an upstream tool pipe string to a wellhead, and connecting the lower end of the hanger sitting and hanging mechanism and a tail pipe to a well bottom to form a complete tool pipe string;
When the annulus is required to be dredged circularly, liquid is injected from a wellhead, the cementing sealing pipe discharges the liquid to the bottom of the well to dredge the annulus in a positive circulation way, and the circulation displacement in the circulation process is set according to the field requirement and is not limited by pressure.
In an exemplary embodiment of another aspect of the invention, the hydraulic transmission control method for sitting-hanging may further include the steps of:
When the hanger is needed to be hung, the temporary plugging ball can be put into a tool pipe string above the hanger, liquid is circularly injected from the wellhead to push the temporary plugging ball, and the temporary plugging ball is pushed to 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 plugging ball is larger than the minimum inner diameter of the conical tube body of the temporary plugging ball seat, the temporary plugging ball cannot pass through, the liquid pressure in the tubular column above the temporary plugging ball rises, and when the preset pressure is reached, the shear pins of the temporary plugging ball seat are sheared, and the temporary plugging ball seat is pushed to drive the temporary plugging ball to move downwards;
When the outer wall of the upper end of the temporary plugging ball seat descends 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 can rebound and reset, the outer wall of the temporary plugging ball seat is clung to the inner wall of the temporary plugging seat outer sealing pipe 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 seated at the upper end of the temporary plugging ball seat and pushed to descend, the whole temporary plugging ball seat can descend simultaneously, the plugging of the side hole on the inner wall of the sealing tube of the temporary plugging seat is removed, and liquid enters an annulus between the central tube of the hanger and the outer sealing tube of the temporary plugging seat through the side hole and enters a liquid inlet channel of the hydraulic cylinder; and after the liquid inlet channel of the hydraulic cylinder is restored, the hydraulic cylinder continuously pressurizes the shaft, when the preset pressure value is reached, the hydraulic cylinder starts the shear pins to shear, the hanger sitting and hanging function is started, the hydraulic cylinder is pushed to drive the sitting and hanging slips to ascend along the conical surface of the hanger cone, the radial expansion movement of the slips is realized, and the tail pipe sitting and hanging is completed.
Compared with the prior art, the invention has the beneficial effects that at least one of the following contents is included:
(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 annulus before the hanger is hung is met, and the displacement can be unrestricted;
(2) When the hanger is hung, the hydraulic transmission control structure is provided with a liquid inlet channel capable of opening the liquid cylinder, so that the hydraulic transmission of the hanger liquid cylinder is realized, the hanger is prevented from being hung in advance, and the purpose that the sleeve is smoothly put in is achieved.
Drawings
The foregoing and other objects and/or features of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates an overall structural schematic 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 hitch mechanism, according to an exemplary embodiment of the present invention;
Fig. 3 is a schematic view showing a structure of an initial state of a hydraulic cylinder pressure transmission control mechanism according to an exemplary embodiment of the present invention;
Fig. 4 is a schematic structural view showing an opened state of a hydraulic cylinder pressure transmission control mechanism according to an exemplary embodiment of the present invention;
FIG. 5 illustrates a schematic view of a temporary block seat outer seal tube according to an exemplary embodiment of the present invention;
fig. 6 shows a cross-sectional view of fig. 5 along the direction F-F.
The main reference numerals:
1-hanger seat hanging mechanism, 11-hanger central tube, 12-hanger cone, 13-seat hanging slip, 14-hydraulic cylinder, 15-hydraulic cylinder start shear pin, 2-hydraulic cylinder pressure transmission control mechanism, 21-cementing sealing tube, 22-upper sealing sleeve, 23-ball seat jacket, 24-temporary plugging seat outer sealing pipes, 241-side holes, 25-temporary plugging ball seats, 251-upper temporary plugging parts, 252-middle temporary plugging parts, 253-lower temporary plugging parts, 26-temporary plugging ball seat shear pins, 27-temporary plugging sealing sleeves, 28-temporary plugging sealing sleeve shells and 29-shear grooves.
Detailed Description
Hereinafter, a recyclable hydraulic liner hanger and a seat-hanging hydraulic transmission control method thereof of the present invention will be described in detail with reference to exemplary embodiments.
It should be noted that the terms "first," "second," and the like are merely used for convenience of description and for convenience of distinction and are not to be construed as indicating or implying relative importance. "upper", "lower", "inner", "outer" are merely for convenience of description and constitute relative orientations or positional relationships, and do not indicate or imply that the components referred to must have that particular orientation or position.
FIG. 1 illustrates an overall structural schematic 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 hitch mechanism, according to an exemplary embodiment of the present invention; fig. 3 is a schematic view showing a structure of an initial state of a hydraulic cylinder pressure transmission control mechanism according to an exemplary embodiment of the present invention; fig. 4 is a schematic structural view showing an opened state of a hydraulic cylinder pressure transmission control mechanism according to an exemplary embodiment of the present invention; FIG. 5 illustrates a schematic view of a temporary block seat outer seal tube according to an exemplary embodiment of the present invention; fig. 6 shows a cross-sectional view of fig. 5 along the direction F-F.
In a first exemplary embodiment of the present invention, as shown in fig. 1, the recyclable hydraulic liner hanger includes a hanger seat-hanging mechanism 1 and a hydraulic cylinder pressure transfer control mechanism 2.
As shown in fig. 2, the hanger hitch mechanism includes a hanger base pipe 11, a hanger cone 12, a hitch slip 13, a hydraulic cylinder 14, and a hydraulic cylinder actuated shear pin 15. The upper tool pipe string of the hanger central pipe and the recyclable hydraulic tail pipe hanger is fixedly and hermetically connected with a wellhead, and the lower end of the hanger central pipe is fixedly and hermetically connected with the upper end of the tail pipe so as to realize the connection with a well bottom.
Further, the hanger cone, the sitting and hanging slips and the hydraulic cylinder are sequentially sleeved on the hanger central tube. 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 hanger center tube. Fixing holes are formed in the corresponding positions of the hydraulic cylinder and the central tube of the hanger, and the hydraulic cylinder starting shear pins are fixed in the fixing holes on the hydraulic cylinder and the central tube of the hanger.
Further, 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 hanger cone.
Further, a liquid cylinder liquid inlet channel is arranged on the outer wall of the central tube of the hanger, and the liquid cylinder liquid inlet channel is communicated with the liquid cylinder.
Further, as shown in fig. 1, the hydraulic cylinder pressure transmission control mechanism 2 is integrally provided in the hanger seat hanging mechanism 1. As shown in fig. 3 or 4, the hydraulic cylinder pressure transmission control mechanism includes a cementing sealing pipe 21, an upper sealing sleeve 22, a temporary plugging seat outer sealing pipe 24, and a lower sealing sleeve.
Further, the cementing sealing pipe is coaxially arranged with the central pipe of the hanger. An annulus is formed between the outer wall of the cementing sealing pipe and the inner wall of the central pipe of the hanger. The inner diameter of the cementing sealing pipe is smaller than that of the central pipe of the hanger.
Further, the upper end of the temporary plugging seat outer sealing pipe 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 provided in the temporary plugging seat outer sealing tube 24.
Further, the temporary plugging ball seat is arranged inside the external sealing tube of the temporary plugging seat. 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 tube of the temporary plugging seat through a shear pin of the temporary plugging ball seat to seal the side hole.
Further, 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 outer sealing tube of the temporary plugging seat, and the lower end of the annulus is sealed.
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 plugging seat outer sealing pipe 24, and the plurality of openings may be disposed on the same cross section.
In this exemplary embodiment, as shown in fig. 3 or fig. 4, a shearing groove 29 may be formed at the lower end of the outer wall of the temporary plugging ball seat 25 in the circumferential direction. One end of the temporary plugging tee shear pin 26 may be disposed 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 sealing sleeve may include a temporary plugging sealing sleeve 27 and a temporary plugging sealing sleeve housing 28. The inner wall of the temporary plugging sealing sleeve is fixedly and hermetically connected with the outer wall of the outer sealing tube 24 of the temporary plugging seat, and the outer wall of the temporary plugging sealing sleeve is hermetically arranged with the inner wall of the temporary plugging sealing sleeve shell. The outer wall of the outer sealing sleeve shell of the temporary plugging seat is sealed with the inner wall of the central tube of the hanger. The inner wall and the outer wall of the temporary plugging sealing sleeve shell can be provided with limiting steps, wherein the steps on the inner wall can be used for limiting downward movement of the temporary plugging sealing sleeve, and the limiting steps on the outer wall can be used for limiting downward movement of the temporary plugging sealing sleeve by contacting with the inner wall of the central tube of the hanger.
In the present exemplary embodiment, as shown in fig. 3 or 4, a ball seat outer sleeve 23 may be disposed between the connection ends of the cementing sealing pipe 21 and the temporary plugging outer sealing 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 tube 24. When the temporary plugging ball seat 25 is contracted, the upper end of the temporary plugging ball seat can be limited and fixed in the inner wall of the temporary plugging ball seat by the ball seat sleeve, 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 temporary blocking ball seat may include an upper temporary blocking portion 251, a middle temporary blocking portion 252, and a lower temporary blocking portion 253, which are sequentially connected. Further, the upper temporary blocking portion may be provided in a split structure. As shown in fig. 3, the split structure may be a complete tee structure after being folded.
Furthermore, the middle temporary plugging part is hollow in the folded or expanded state. The liquid can radially permeate to the inner wall of the outer sealing tube of the temporary plugging sealing seat through the hollowed-out part.
Further, as shown in fig. 3 or fig. 4, a shear groove 29 and a seal groove may be circumferentially provided 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 temporary plugging ball seat shear nails.
Further, 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 liquid cylinder corresponds to the position of the sealing groove.
Further, the upper temporary blocking portion and the middle temporary blocking portion can rebound and reset.
In this example embodiment, as shown in fig. 3, when the temporary plugging tee is secured in the interior wall of the tee housing. The temporary plugging ball seat can be of a conical tubular structure. At this time, the inner diameters of the upper temporary plugging portion, the middle temporary plugging portion and the lower temporary plugging portion are sequentially increased. The minimum inner diameter of the conical tube body is smaller than the sphere diameter of the temporary plugging sphere. As shown in fig. 4, after the upper temporary blocking portion is separated from the limitation of the inner wall of the ball seat jacket, the upper temporary blocking portion and the middle temporary blocking portion are reset and expanded. At this time, the outer wall of the temporary plugging part of the upper part is clung to the inner wall of the outer sealing tube 24 of the temporary plugging seat. The temporary plugging seat outer sealing pipe 24 limits the temporary plugging ball seat 25, so that the temporary plugging ball seat is still in a furled state. The inner diameter of the temporary plugging ball seat after the reset expansion is consistent in size.
In a second exemplary embodiment of the present invention, the present invention is achieved by the recyclable hydraulic liner hanger described in the first exemplary embodiment, the present invention comprising the steps of:
the upper end of the hanger sitting and hanging mechanism and the lower end of the upstream tool pipe string are connected to a wellhead, and the lower end of the hanger sitting and hanging mechanism and the tail pipe are connected to the bottom of the well to form a complete tool pipe string.
When the annular space is required to be circularly dredged, liquid is injected from a wellhead, and the cementing sealing pipe discharges the liquid to the bottom of the well to positively circularly dredge the annular space. The circulation displacement in the circulation process can be set according to the field requirement and is not limited by pressure.
In this exemplary embodiment, the sitting-hanging hydraulic transmission control method may further include the steps of:
When the hanger is needed to be hung, the temporary plugging ball is put into a 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 of the conical tubular structure of the temporary plugging ball seat.
The inner diameter of the temporary plugging ball is larger than the minimum inner diameter of the conical tubular structure of the temporary plugging ball seat, and the temporary plugging ball seat can limit the movement of the temporary plugging ball.
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 shear pins of the temporary plugging ball seat shear the shear pins to push the temporary plugging ball seat to drive the temporary plugging ball to descend.
When the inner wall of the upper end of the temporary plugging ball seat descends 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 of the temporary plugging ball seat and the temporary plugging part at the middle part are expanded and reset, the outer wall of the temporary plugging ball seat after reset is clung to the inner wall of the temporary plugging seat outer sealing tube, 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, and at the moment, the outer diameter of the temporary plugging ball is smaller than the inner diameter of the temporary plugging ball seat, and the temporary plugging ball can pass through the temporary plugging ball seat and continuously descend.
The temporary plugging ball is arranged at the upper end of the temporary plugging ball seat, the whole temporary plugging ball seat descends simultaneously when being pushed to descend, and after the temporary plugging ball seat descends integrally, the side hole on the wall of the outer sealing pipe of the temporary plugging seat is not plugged any more, and liquid flows to an annulus 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 after the liquid inlet channel of the hydraulic cylinder is restored, the well bore is continuously pressurized, when the pressure is increased to a preset pressure value, the hydraulic cylinder starts the shear pins to shear, the hanger sitting and hanging function is started, the hydraulic cylinder is pushed to drive the sitting and hanging slips to ascend along the conical surface of the cone of the hanger together, the radial expansion movement of the sitting and hanging slips is realized, and the tail pipe sitting and hanging is completed.
In summary, the advantages of the present invention may include at least one of the following:
(1) The hydraulic cylinder pressure transmission control mechanism designed by the invention controls the temporary plugging of the hydraulic cylinder liquid inlet channel in the sleeve pipe insertion process, thereby not only protecting the hydraulic cylinder shear pins from being accidentally sheared, effectively preventing the hanger from sitting and hanging in advance, but also ensuring the normal circulation of liquid in a shaft;
(2) When the sleeve is put into place and the hanger is needed to be hung, the temporary plugging seat is pushed to descend through ball throwing and pressure holding, a liquid inlet channel of the liquid cylinder can be restored, pressure transmission is completed, and the hanger is hung by the hanger after the follow-up normal pressure holding construction, so that the hanger is convenient and efficient.
Although a recyclable hydraulic liner hanger and a seat-hanging hydraulic transmission control method thereof of the present invention have been described above by way of example embodiments, it should be apparent to those skilled in the art that various modifications and adaptations can be made to the example embodiments of the present invention without departing from the spirit and scope thereof as defined in the claims.
Claims (6)
1. A recyclable hydraulic liner hanger is characterized by comprising a hanger sitting and hanging mechanism and a hydraulic transmission control mechanism,
The hanger sitting and hanging mechanism comprises a hanger central tube, a hanger cone, sitting and hanging slips, a hydraulic cylinder and a hydraulic cylinder starting shear pin, wherein the upper end of the hanger central tube is fixedly and hermetically connected with the lower end of an upstream tool tube string of the recyclable hydraulic tail tube hanger, and the lower end of the hanger central tube is fixedly and hermetically connected with the upper end of the tail tube;
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 the conical surface of the hanger cone faces downwards; the hydraulic cylinder is connected with the hanger central tube; 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 sitting 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,
The cementing sealing pipe and the central pipe of the hanger are coaxially arranged, and an annulus is formed between the outer wall of the cementing sealing pipe and the inner wall of the central pipe of the hanger;
The upper end of the temporary plugging seat outer sealing pipe is coaxially and hermetically arranged with the lower end of the cementing sealing pipe;
A side hole is radially arranged on the outer sealing tube 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 lower end of the cementing sealing pipe, and the lower end of the temporary plugging ball seat is fixedly arranged on the inner wall of the temporary plugging seat outer sealing pipe through a shear pin of the temporary plugging ball seat 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 outer sealing tube of the temporary plugging seat and seals the lower end of the annulus;
the lower sealing sleeve comprises a temporary plugging sealing sleeve and a temporary plugging sealing sleeve shell, wherein,
The inner wall of the temporary plugging sealing sleeve is in sealing arrangement with the outer wall of the temporary plugging seat outer sealing tube, and the outer wall of the temporary plugging sealing sleeve is in sealing arrangement with the inner wall of the temporary plugging sealing sleeve shell;
The outer wall of the temporary plugging sealing sleeve shell is in sealing arrangement with the inner wall of the central tube of the hanger, limiting steps are arranged on the temporary plugging sealing sleeve shell, the limiting steps on the inner wall are used for limiting downward movement of the temporary plugging sealing sleeve, and the limiting steps on the outer wall are used for being in contact with the inner wall of the central tube of the hanger to limit downward movement of the temporary plugging sealing sleeve;
A ball seat jacket is further arranged between the connecting ends of the cementing sealing pipe and the temporary plugging seat outer sealing pipe, the outer wall of the ball seat jacket is in coaxial sealing fit with the inner wall of the temporary plugging seat outer sealing pipe, after the temporary plugging ball seat is contracted, the upper end of the temporary plugging ball seat is fixed in the inner wall of the ball seat jacket, and the temporary plugging ball seat is limited to keep a contracted state;
The outer wall of the temporary plugging sealing sleeve is in coaxial sealing fit with the inner wall of the central tube of the hanger, so that liquid is prevented from entering between the central tube of the hanger and the outer sealing tube of the temporary plugging seat from the lower end of the hydraulic cylinder pressure transmission control mechanism;
The temporary plugging ball seat comprises an upper temporary plugging part, a middle temporary plugging part and a lower temporary plugging part which are sequentially connected, wherein the upper temporary plugging part and the middle temporary plugging part can rebound and reset,
The upper temporary plugging part is configured into a split structure, and the split structure is in a complete ball seat shape after being folded;
the middle temporary plugging part is in a hollow state in a furled or expanded state, and liquid can radially permeate into the inner wall of the outer sealing tube of the temporary plugging seat through the hollow part;
The outer wall of the temporary plugging part at the lower part is circumferentially provided with a shearing groove and a sealing groove, the sealing groove is arranged to seal a liquid inlet channel of the outer sealing pipe of the temporary plugging seat, and the shearing groove is configured to be matched with an opening on the outer sealing pipe of the temporary plugging seat to install a temporary plugging ball seat shear pin.
2. The recyclable hydraulic liner hanger of claim 1, wherein the side bore comprises a plurality of openings radially disposed along the temporary plugging seat outer seal tube and located on a common cross section.
3. The recyclable hydraulic liner hanger of claim 2, wherein the outer wall of the lower end of the temporary plugging ball seat is circumferentially provided with shear grooves, one end of the temporary plugging ball seat shear pin being disposed in a portion of the plurality of openings, the other end being disposed in the shear groove.
4. The recyclable hydraulic liner hanger as claimed in claim 1, wherein the temporary plugging ball seat is shaped as a tapered tube when assembled into the inner wall of the ball seat housing, 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 inner diameter, the minimum inner diameter of the tapered tube body is smaller than the inner diameter of the temporary plugging ball, and 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 limitation of the outer sealing tube of the temporary plugging seat, and the inner diameters of the temporary plugging ball seats are consistent.
5. A setting hydraulic transmission control method using the recyclable hydraulic liner hanger according to any one of claims 1 to 4, the transmission control method comprising the steps of:
Connecting the upper end of the hanger sitting and hanging mechanism and an upstream tool pipe string to a wellhead, and connecting the lower end of the hanger sitting and hanging mechanism and a tail pipe to a well bottom to form a complete tool pipe string;
When the annulus is required to be dredged circularly, liquid is injected from a wellhead, the cementing sealing pipe discharges the liquid to the bottom of the well to dredge the annulus in a positive circulation way, and the circulation displacement in the circulation process is set according to the field requirement and is not limited by pressure.
6. The on-hook hydraulic transmission control method according to claim 5, characterized by further comprising the steps of:
when the hanger is needed to be hung, the temporary plugging ball is put into a tool pipe string above the hanger, liquid is circularly injected from the wellhead to push the temporary plugging ball, and the temporary plugging ball is pushed to 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 plugging ball is larger than the minimum inner diameter of the conical tube body of the temporary plugging ball seat, the temporary plugging ball cannot pass through, the liquid pressure in the tubular column above the temporary plugging ball rises, and when the preset pressure is reached, the shear pins of the temporary plugging ball seat are sheared, and the temporary plugging ball seat is pushed to drive the temporary plugging ball to move downwards;
When the outer wall of the upper end of the temporary plugging ball seat descends 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 of the temporary plugging ball seat 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 is clung to the inner wall of the temporary plugging seat outer sealing pipe 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 seated at the upper end of the temporary plugging ball seat and pushed to descend, the whole temporary plugging ball seat descends simultaneously, the plugging of the side hole on the inner wall of the outer sealing tube of the temporary plugging seat is removed, and liquid enters an annulus between the central tube of the hanger and the outer sealing tube of the temporary plugging seat through the side hole and enters a liquid inlet channel of the hydraulic cylinder; and after the liquid inlet channel of the hydraulic cylinder is restored, the hydraulic cylinder continuously pressurizes the shaft, when the preset pressure value is reached, the hydraulic cylinder starts the shear pins to shear, the hanger sitting and hanging function is started, the hydraulic cylinder is pushed to drive the sitting and hanging slips to ascend along the conical surface of the hanger cone, the radial expansion movement of the slips is realized, and the tail pipe sitting and hanging is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211287218.0A CN115596387B (en) | 2022-10-20 | 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 | 2022-10-20 | Recyclable hydraulic tail pipe hanger and sitting and hanging hydraulic transmission control method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN115596387A CN115596387A (en) | 2023-01-13 |
| CN115596387B true CN115596387B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211287218.0A Active CN115596387B (en) | 2022-10-20 | 2022-10-20 | Recyclable hydraulic tail pipe hanger and sitting and hanging hydraulic transmission control method thereof |
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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 |
-
2022
- 2022-10-20 CN CN202211287218.0A patent/CN115596387B/en active Active
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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| Publication number | Publication date |
|---|---|
| CN115596387A (en) | 2023-01-13 |
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