CN221074185U - Coiled tubing gas injection packer suitable for oil field underground gas injection process - Google Patents
Coiled tubing gas injection packer suitable for oil field underground gas injection process Download PDFInfo
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- CN221074185U CN221074185U CN202323031509.6U CN202323031509U CN221074185U CN 221074185 U CN221074185 U CN 221074185U CN 202323031509 U CN202323031509 U CN 202323031509U CN 221074185 U CN221074185 U CN 221074185U
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- 238000002347 injection Methods 0.000 title claims abstract description 59
- 239000007924 injection Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 title claims abstract description 24
- 229920001971 elastomer Polymers 0.000 claims abstract description 131
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000001012 protector Effects 0.000 claims description 14
- 238000012856 packing Methods 0.000 claims description 11
- 238000004873 anchoring Methods 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 16
- 230000007246 mechanism Effects 0.000 abstract description 10
- 230000002572 peristaltic effect Effects 0.000 abstract description 7
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a coiled tubing gas injection packer suitable for an oilfield underground gas injection process, which comprises a central tube, wherein two ends of the central tube are respectively connected with an upper joint and a lower joint in a threaded manner, an upper-stage piston group, a slip sleeve and a lower-stage piston group are sleeved between the upper joint and the lower joint in sequence from top to bottom, an upper-stage sealing rubber cylinder group is sleeved between the upper-stage piston group and the upper joint, a liquid inlet A is formed in the upper-stage piston group, a lower-stage sealing rubber cylinder group is sleeved between the lower-stage piston group and the slip sleeve, a liquid inlet B is formed in the lower-stage piston group, and a slip is sleeved between the slip sleeve and the central tube. The utility model is suitable for a coiled tubing gas injection packer used in an oilfield underground gas injection process, and solves the problems that the peristaltic movement of a tubular column is caused when the injection is stopped due to low CO 2 injection temperature, and the sealing performance of the packer is reduced. The two groups of sealing mechanisms of the packer have larger sealing area, longer sealing compartment distance, more reliable sealing and simple and reliable field operation.
Description
Technical Field
The utility model relates to the technical field of oilfield exploitation equipment, in particular to a coiled tubing gas injection packer suitable for an oilfield downhole gas injection process.
Background
In recent years, with the continuous deep understanding of the mechanism of CO 2 displacement, CO 2 is driven to be an emerging technology for improving recovery efficiency of low-permeability oil fields at home and abroad. Because the CO 2 injection temperature is low, the peristaltic movement of the pipe column can be caused when the injection is stopped, and the sealing performance of the packer is reduced, so that higher requirements are put forward on the packer of the gas injection well, and the gas sealing and corrosion resistance under the long-term underground service environment are required to be met.
Therefore, it is necessary to design a hermetic sealing packer on the basis of the prior art, which can overcome the adverse effect caused by the peristaltic movement of the underground pipe column and ensure the long-term effective sealing performance.
Disclosure of utility model
The utility model aims to provide a coiled tubing gas injection packer suitable for an oilfield underground gas injection process, which solves the problems that the peristaltic movement of a tubular column is caused when the injection is stopped due to low CO 2 injection temperature and the sealing performance of the packer is reduced.
The technical scheme adopted by the utility model is as follows: the coiled tubing gas injection packer comprises a central tube, wherein two ends of the central tube are respectively connected with an upper joint and a lower joint in a threaded mode, an upper-stage piston group, a slip sleeve and a lower-stage piston group are sequentially sleeved between the upper joint and the lower joint from top to bottom, an upper-stage sealing rubber cylinder group is sleeved between the upper-stage piston group and the upper joint, a liquid inlet A is formed in the upper-stage piston group, a lower-stage sealing rubber cylinder group is sleeved between the lower-stage piston group and the slip sleeve, a liquid inlet B is formed in the lower-stage piston group, and slips are sleeved between the slip sleeve and the central tube intermediate layer.
The utility model is also characterized in that:
the upper-level sealing rubber cylinder group comprises a side rubber cylinder I, a spacing ring I, a middle rubber cylinder, a spacing ring II and a side rubber cylinder II which are sequentially sleeved on the central pipe from top to bottom, and a shoulder protector I is arranged at one end, close to the upper joint, of the side rubber cylinder I;
A conical ring I is sleeved between the upper-stage sealing rubber cylinder group and the upper joint, and a protection block I is arranged between the conical ring I and the upper joint;
One end of the side rubber cylinder II, which is far away from the upper joint, is provided with a shoulder protecting II, a conical ring II is sleeved between the upper-stage sealing rubber cylinder group and the upper-stage piston group, and a protecting block II is assembled between the conical ring II and the upper-stage piston group.
The upper piston group comprises a rubber cylinder seat, one end of the rubber cylinder seat is connected with a protection block II, the other end of the rubber cylinder seat is provided with an upper piston in threaded connection with a central tube, the upper piston is connected with an upper lock ring seat, the outer peripheral threads of the upper piston and the upper lock ring seat are connected with an upper lock sleeve, the upper lock sleeve is connected with an upper cone through a setting pin, one end of the upper lock ring seat, far away from the upper piston group, is in threaded connection with the upper cone, the upper cone is fixed on the central tube through an upper cone pin, and the upper lock ring seat is provided with an upper lock ring.
The lower-stage sealing rubber cylinder group comprises a shoulder protecting cylinder III, a lower-stage sealing rubber cylinder I, a spacing ring III, a lower-stage sealing rubber cylinder II and a shoulder protecting cylinder IV which are sequentially sleeved on the central pipe from top to bottom;
The lower-stage piston group comprises a lower rubber cylinder seat, a steel sleeve is connected with the periphery of the lower rubber cylinder seat in a threaded manner, and a lower lock sleeve is connected with one end of the steel sleeve, which is far away from the lower rubber cylinder seat, in a threaded manner.
The steel sleeve is sleeved outside the lower joint, the lower joint is in threaded connection with the central pipe, a lower lock ring is sleeved between the lower joint and the middle layer of the steel sleeve, the lower lock ring is connected with a supporting ring, the lower lock ring and the supporting ring are fixed on the lower joint through deblocking pins, a shear pin seat is in threaded connection with one end of the lower joint, which is far away from the lower-stage piston group, a lower setting pin is arranged in the shear pin seat, and the lower lock sleeve is connected with the shear pin seat through the lower setting pin.
The slip sleeve is arranged in the middle layer of the slip sleeve and the central tube, two ends of the slip sleeve are respectively fixed on the upper cone and the lower cone through fixing pins, and the lower cone is sleeved on the central tube and is in threaded connection with the shoulder guard III.
The slips adopt a concentric slip double-cone anchoring structure mode, and 4 slips are uniformly distributed at 90 degrees.
The upper lock ring and the lower lock ring are two groups of lock rings locked by single-side threads in a stepping way.
The upper joint and the central tube adopt three sealing modes of end metal sealing, upper tetrafluoro gasket and hydrogenated nitrile rubber at the same time.
The beneficial effects of the utility model are as follows:
The coiled tubing gas injection packer suitable for the oilfield underground gas injection process has the following advantages: the continuous oil pipe gas injection packer is provided with the double-group rubber cylinder sealing mechanism, and is provided with the independent setting and locking mechanisms, the sealing areas of the two groups of sealing mechanisms are larger, the sealing interval distance is longer, the sealing is more reliable relative to the sealing of the single-group rubber cylinder, the independent setting mechanism is small in setting pressure, the site operation is simple and reliable, the double-locking mechanism can ensure that the other group of rubber cylinders are not influenced by the failure of one group of rubber cylinders to keep sealing, the novel combined anti-bulge mechanism improves the high pressure resistance and sealing effect, the damage to the rubber cylinders caused by the peristaltic movement of the pipe column due to the temperature and pressure change can be solved through the bidirectional anchoring, the continuous oil pipe gas injection packer is reasonable in structure, convenient to operate and reliable in sealing performance, unnecessary operation caused by unsealing of the packer is reduced, the labor intensity is reduced, and the operation risk and the operation construction cost are reduced.
Drawings
FIG. 1 is a schematic diagram of a coiled tubing gas injection packer of the present utility model adapted for use in an oilfield downhole gas injection process;
FIG. 2 is a schematic diagram of a partial structure of a coiled tubing gas injection packer adapted for use in an oilfield downhole gas injection process.
In the figure: 1. the upper joint, 2, the center tube, 3, the protection block, 4, the taper tube, 5, the shoulder protector, 6, the side rubber tube, 7, the spacer tube, 8, the middle rubber tube, 9, the spacer tube, 10, the side rubber tube, 11, the shoulder protector, 12, 13, the taper tube, 14, the upper rubber tube seat, 15, the upper piston, 16, the upper lock ring, 17, the upper lock sleeve, 18, the upper lock ring seat, 19, the upper seal pin, 20, the upper cone, 21, the upper cone pin, 22, the slips, 23, the slip sleeve, 24, the lower cone, shoulder iii, 26, lower set of barrels i, 27, spacer iii, 28, lower set of barrels ii, 29, shoulder iv, 30, lower barrel seat, 31, steel sleeve, 32, lower joint, 33, lower lock ring, 34, support ring, 35, unsealing pin, 36, lower lock sleeve, 37, lower set pin, 38, shear pin seat, 39, upper stage piston set, 40, upper stage seal barrel set, 41, lower stage piston set, 42, lower stage seal barrel set, 43, feed port a,44, feed port B.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
The utility model is suitable for the coiled tubing gas injection packer used in the oil field underground gas injection process, as shown in figure 1, comprising a central tube 2, wherein the two ends of the central tube 2 are respectively connected with an upper joint 1 and a lower joint 32 in a threaded manner, and an upper-stage piston group 39, a slip sleeve 23 and a lower-stage piston group 41 are sleeved between the upper joint 1 and the lower joint 32 in sequence from top to bottom;
As shown in fig. 2, the slips 22 are sleeved on the middle layer of the slip sleeve 23 and the central tube 2, two ends of the slips are respectively fixed on the upper cone 20 and the lower cone 24 by fixing pins, and the lower cone 24 is sleeved on the central tube 2 and is in threaded connection with the shoulder pad III 25; the slips 22 adopt a concentric slip double-cone anchoring structure mode, and 4 slips are totally distributed uniformly at 90 degrees; the upper joint 1 and the central tube 2 adopt three sealing modes of end metal sealing, an upper tetrafluoro gasket and hydrogenated nitrile rubber at the same time;
An upper sealing rubber cylinder group 40 is sleeved between the upper piston group 39 and the upper joint 1, the upper piston group 39 comprises an upper rubber cylinder seat 14, one end of the upper rubber cylinder seat 14 is connected with a protection block II 13, the other end of the upper rubber cylinder seat 14 is provided with an upper piston 15 in threaded connection with the central tube 2, the upper piston 15 is connected with an upper lock ring seat 18, the peripheries of the upper piston 15 and the upper lock ring seat 18 are in threaded connection with an upper lock sleeve 17, the upper lock sleeve 17 is connected with an upper cone 20 through an upper setting pin 19, one end of the upper lock ring seat 18, far away from the upper piston group 39, is in threaded connection with the upper cone 20, the upper cone 20 is fixed on the central tube 2 through an upper cone pin 21, and the upper lock ring seat 18 is provided with an upper lock ring 16; the upper-stage sealing rubber cylinder group 40 comprises a side rubber cylinder I6, a spacing ring I7, a middle rubber cylinder 8, a spacing ring II 9 and a side rubber cylinder II 10 which are sequentially sleeved on the central tube 2 from top to bottom, and a shoulder protector I5 is arranged at one end, close to the upper joint 1, of the side rubber cylinder I6; a liquid inlet hole A43 is formed in the upper-stage piston group 39, a conical ring I4 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper joint 1, and a protection block I3 is assembled between the conical ring I4 and the upper joint 1; one end of the side rubber cylinder II 10, which is far away from the upper joint 1, is provided with a shoulder protecting II 11, a conical ring II 12 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper-stage piston group 39, and a protecting block II 13 is arranged between the conical ring II 12 and the upper-stage piston group 39.
A lower-stage sealing rubber cylinder group 42 is sleeved between the lower-stage piston group 41 and the slip sleeve 23, a liquid inlet B44 is formed in the lower-stage piston group 41, the slip sleeve 22 is sleeved between the slip sleeve 23 and the middle layer of the central tube 2, the lower-stage piston group 41 comprises a lower rubber cylinder seat 30, a steel sleeve 31 is connected with the periphery of the lower rubber cylinder seat 30 in a threaded manner, a lower lock sleeve 36 is connected with one end of the steel sleeve 31, which is far away from the lower rubber cylinder seat 30, and the lower-stage sealing rubber cylinder group 42 comprises a shoulder protecting III 25, a lower-stage rubber cylinder I26, a spacer III 27, a lower-stage rubber cylinder II 28 and a shoulder protecting IV 29 which are sequentially sleeved on the central tube 2 from top to bottom;
The steel sleeve 31 and the lower lock sleeve 36 are sleeved outside the lower joint 32, the lower joint 32 is in threaded connection with the central pipe 2, a lower lock ring 33 is sleeved between the lower joint 32 and the middle layer of the steel sleeve 31, a supporting ring 34 is arranged below the lower lock ring 33, the supporting ring 34 is fixed on the lower joint 32 by a deblocking pin 35, one end of the lower joint 32, which is far away from the lower piston group 41, is in threaded connection with a shear pin seat 38, a lower setting pin 37 is arranged in the shear pin seat 38, and the lower lock sleeve 36 is connected with the shear pin seat 38 through the lower setting pin 37;
The upper lock ring 16 and the lower lock ring 33 are two sets of single-sided thread step-locked lock rings.
The packer adopts double-group sealing and is designed mainly for improving the air tightness, and because the upper and lower sets of rubber cylinder groups are adopted, the sealing position and the sealing area between the rubber cylinder and the casing wall are increased, so that the packer has good sealing performance, high bearing pressure difference and long effective service life, and when in setting, an oil pipe presses the upper-stage piston group 39 to push the upper-stage sealing rubber cylinder group 40, the lower-stage piston group 41 pushes the lower-stage sealing rubber cylinder group 42, and the double-piston group linkage action mode is adopted, so that the setting force is small and the performance is reliable.
When the packer is set and compressed, the upper lock ring 16 and the upper lock sleeve 17 are relatively displaced to lock the upper-stage sealing rubber cylinder group 40; the lower lock ring 33 and the lower lock sleeve 36 simultaneously generate relative displacement to lock the lower sealing rubber cylinder group 42, and the two groups of rubber cylinders are respectively locked, so that even if one group of rubber cylinders fails and the other group is not affected, the reliability, the safety and the plugging success rate of the tool are greatly improved, and the plugging effective period is prolonged.
The packer adopts a concentric slip double-cone anchoring structure mode, 4 slips are distributed uniformly at 90 degrees, and when the packer is pressed up, the upper cone 20 pushes down the slips 22; when the pipe is pressed down, the lower cone 24 pushes up the slips 22, and the force is transferred to the casing, so that the negative influence caused by the peristaltic movement of the pipe column is effectively solved, and the bidirectional anchoring is realized.
The rubber cylinder two-end anti-bursting protection mechanism composed of the shoulder pad, the conical ring and the protection block is expanded along with the rubber cylinder, so that the problem of end bulge of the rubber cylinder during setting is effectively reduced, the bearing capacity of the rubber cylinder is improved, the sealing performance of the packer at high temperature and high pressure is ensured, and the sealing effect of the rubber cylinder is improved.
The utility model will be described in more detail by way of examples
Example 1
The coiled tubing gas injection packer comprises a central tube 2, wherein two ends of the central tube 2 are respectively connected with an upper joint 1 and a lower joint 32 in a threaded manner, an upper-stage piston group 39, a slip sleeve 23 and a lower-stage piston group 41 are sequentially sleeved between the upper joint 1 and the lower joint 32 from top to bottom, an upper-stage sealing rubber cylinder group 40 is sleeved between the upper-stage piston group 39 and the upper joint 1, a liquid inlet A43 is formed in the upper-stage piston group 39, a lower-stage sealing rubber cylinder group 42 is sleeved between the lower-stage piston group 41 and the slip sleeve 23, a liquid inlet B44 is formed in the lower-stage piston group 41, and a slip 22 is sleeved between the slip sleeve 23 and the middle layer of the central tube 2.
Example 2
The coiled tubing gas injection packer suitable for the oilfield underground gas injection process comprises a central tube 2, wherein two ends of the central tube 2 are respectively connected with an upper joint 1 and a lower joint 32 in a threaded manner, an upper-stage piston group 39, a slip sleeve 23 and a lower-stage piston group 41 are sleeved between the upper-stage piston group 39 and the upper joint 1 in sequence from top to bottom, an upper-stage sealing rubber cylinder group 40 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper joint 1, a taper ring I4 is sleeved between the taper ring I4 and the upper joint 1, and a protection block I3 is assembled between the taper ring I4 and the upper joint 1; the upper-stage sealing rubber cylinder group 40 comprises a side rubber cylinder I6, a spacing ring I7, a middle rubber cylinder 8, a spacing ring II 9 and a side rubber cylinder II 10 which are sequentially sleeved on the central tube 2 from top to bottom, and a shoulder protector I5 is arranged at one end, close to the upper joint 1, of the side rubber cylinder I6; the upper-stage piston group 39 is provided with a liquid inlet A43, a lower-stage sealing rubber cylinder group 42 is sleeved between the lower-stage piston group 41 and the slip sleeve 23, the lower-stage piston group 41 is provided with a liquid inlet B44, and the slip sleeve 23 and the middle layer of the central tube 2 are sleeved with slips 22; one end of the side rubber cylinder II 10, which is far away from the upper joint 1, is provided with a shoulder protecting II 11, a conical ring II 12 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper-stage piston group 39, and a protecting block II 13 is arranged between the conical ring II 12 and the upper-stage piston group 39.
Example 3
The coiled tubing gas injection packer suitable for the oilfield underground gas injection process comprises a central tube 2, wherein two ends of the central tube 2 are respectively connected with an upper joint 1 and a lower joint 32 in a threaded manner, an upper-stage piston group 39, a slip sleeve 23 and a lower-stage piston group 41 are sleeved between the upper joint 1 and the lower joint 32 from top to bottom in sequence, the upper-stage piston group 39 comprises an upper rubber cylinder seat 14, one end of the upper rubber cylinder seat 14 is connected with a protection block II 13, the other end of the upper rubber cylinder seat 14 is provided with an upper piston 15 in threaded connection with the central tube 2, the upper piston 15 is connected with an upper locking ring seat 18, the peripheries of the upper piston 15 and the upper locking ring seat 18 are in threaded connection with an upper locking sleeve 17, the upper locking sleeve 17 is connected with an upper cone 20 through an upper setting pin 19, one end of the upper locking ring seat 18 far away from the upper-stage piston group 39 is in threaded connection with the upper cone 20, the upper cone 20 is fixed on the central tube 2 through an upper cone pin 21, and the upper locking ring seat 18 is provided with an upper locking ring 16;
An upper-stage sealing rubber cylinder group 40 is sleeved between the upper-stage piston group 39 and the upper joint 1, a conical ring I4 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper joint 1, and a protection block I3 is assembled between the conical ring I4 and the upper joint 1; the upper-stage sealing rubber cylinder group 40 comprises a side rubber cylinder I6, a spacing ring I7, a middle rubber cylinder 8, a spacing ring II 9 and a side rubber cylinder II 10 which are sequentially sleeved on the central tube 2 from top to bottom, and a shoulder protector I5 is arranged at one end, close to the upper joint 1, of the side rubber cylinder I6; the upper-stage piston group 39 is provided with a liquid inlet hole A43, one end of the side rubber cylinder II 10, which is far away from the upper joint 1, is provided with a shoulder protector II 11, a conical ring II 12 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper-stage piston group 39, and a protection block II 13 is assembled between the conical ring II 12 and the upper-stage piston group 39;
A lower-stage sealing rubber cylinder group 42 is sleeved between the lower-stage piston group 41 and the slip sleeve 23, a liquid inlet B44 is formed in the lower-stage piston group 41, and the slip 22 is sleeved between the slip sleeve 23 and the middle layer of the central pipe 2.
Example 4
The coiled tubing gas injection packer suitable for the oilfield underground gas injection process comprises a central tube 2, wherein two ends of the central tube 2 are respectively connected with an upper joint 1 and a lower joint 32 in a threaded manner, an upper-stage piston group 39, a slip sleeve 23 and a lower-stage piston group 41 are sleeved between the upper joint 1 and the lower joint 32 from top to bottom in sequence, the upper-stage piston group 39 comprises an upper rubber cylinder seat 14, one end of the upper rubber cylinder seat 14 is connected with a protection block II 13, the other end of the upper rubber cylinder seat 14 is provided with an upper piston 15 in threaded connection with the central tube 2, the upper piston 15 is connected with an upper locking ring seat 18, the peripheries of the upper piston 15 and the upper locking ring seat 18 are in threaded connection with an upper locking sleeve 17, the upper locking sleeve 17 is connected with an upper cone 20 through an upper setting pin 19, one end of the upper locking ring seat 18 far away from the upper-stage piston group 39 is in threaded connection with the upper cone 20, the upper cone 20 is fixed on the central tube 2 through an upper cone pin 21, and the upper locking ring seat 18 is provided with an upper locking ring 16;
An upper-stage sealing rubber cylinder group 40 is sleeved between the upper-stage piston group 39 and the upper joint 1, a conical ring I4 is sleeved between the upper-stage sealing rubber cylinder group 40 and the upper joint 1, and a protection block I3 is assembled between the conical ring I4 and the upper joint 1; the upper-stage sealing rubber cylinder group 40 comprises a side rubber cylinder I6, a spacing ring I7, a middle rubber cylinder 8, a spacing ring II 9 and a side rubber cylinder II 10 which are sequentially sleeved on the central tube 2 from top to bottom, and a shoulder protector I5 is arranged at one end, close to the upper joint 1, of the side rubber cylinder I6; the upper piston group 39 is provided with a liquid inlet hole A43, one end of the side rubber cylinder II 10 far away from the upper joint 1 is provided with a shoulder protecting II 11, a conical ring II 12 is sleeved between the upper sealing rubber cylinder group 40 and the upper piston group 39, and a protecting block II 13 is assembled between the conical ring II 12 and the upper piston group 39.
A lower-stage sealing rubber cylinder group 42 is sleeved between the lower-stage piston group 41 and the slip sleeve 23, a liquid inlet B44 is formed in the lower-stage piston group 41, and a slip 22 is sleeved between the slip sleeve 23 and the middle layer of the central pipe 2;
The lower-stage sealing rubber cylinder group 42 comprises a shoulder protector III 25, a lower-stage sealing rubber cylinder I26, a spacing ring III 27, a lower-stage sealing rubber cylinder II 28 and a shoulder protector IV 29 which are sleeved on the central tube 2 in sequence from top to bottom;
The lower-stage piston group 41 comprises a lower rubber cylinder seat 30, a steel sleeve 31 is connected with the periphery of the lower rubber cylinder seat 30 in a threaded manner, and a lower lock sleeve 36 is connected with one end, far away from the lower rubber cylinder seat 30, of the steel sleeve 31 in a threaded manner;
The steel sleeve 31 and the lower lock sleeve 36 are sleeved outside the lower joint 32, the lower joint 32 is in threaded connection with the central tube 2, the lower lock sleeve 33 is sleeved on the middle layer of the lower joint 32 and the steel sleeve 31, the supporting ring 34 is connected below the lower lock sleeve 33, the supporting ring 34 is fixed on the lower joint 32 through the deblocking pin 35, one end of the lower joint 32 far away from the lower piston group 41 is in threaded connection with the shear pin seat 38, the lower setting pin 37 is arranged in the shear pin seat 38, and the lower lock sleeve 36 is connected with the shear pin seat 38 through the lower setting pin 37.
The utility model relates to a coiled tubing gas injection packer suitable for an oilfield underground gas injection process, which has the following working principle:
the packer is provided with two groups of rubber barrels to ensure sealing reliability, and a slip anchoring mechanism is arranged between the two groups of rubber barrels, 4 slips are adopted in a concentric slip double-cone anchoring structure mode, the slips are uniformly distributed at 90 degrees, and when the packer is pressed up, the upper cone pushes down the slips; when the pipe is pressed down, the lower cone pushes up the slips, and the force is transferred to the sleeve, so that the negative influence caused by the peristaltic movement of the pipe column is effectively solved, and the bidirectional anchoring is realized.
Setting process: the gas injection packer is connected with a coiled tubing thread and is put into a designed position, hydraulic pressure enters an upper piston cavity formed by the upper packing element seat 14 and the upper piston 15 from a liquid inlet hole A43 at the upper end of the central tube 2, thrust is transmitted to the upper setting pin 19 along with the increase of the hydraulic pressure, and the upper setting pin 19 is sheared when the thrust is larger than the shearing force of the pin; the hydraulic pressure is continuously improved, the upper lock sleeve 17 is driven by the rubber cylinder seat 14 to ascend, the side rubber cylinder I6, the middle rubber cylinder 8 and the side rubber cylinder II 10 are compressed, and meanwhile, the taper ring I4 and the taper ring II 12 are spread to protect the shoulder of the rubber cylinder; the upper lock ring 16 and the upper lock sleeve 17 are relatively displaced to lock the upper sealing rubber cylinder group 40 when the packer is set and compressed rubber cylinders.
Meanwhile, hydraulic pressure enters a piston cavity formed by the lower rubber cylinder seat 30 and the lower joint 32 from a liquid inlet hole B44 at the lower end of the central tube 2, thrust is transmitted to the lower setting pin 37 along with the increase of the hydraulic pressure, and the lower setting pin 37 is sheared when the thrust is larger than the shearing force of the pin; the hydraulic pressure is continuously improved, the lower rubber sleeve seat 30 drives the steel sleeve 31 and the lower lock sleeve 36 to ascend, the lower rubber sleeve I26 and the lower rubber sleeve II 28 are compressed, the lower sealing rubber sleeve group 42 continues to ascend to push the lower cone 24 to ascend, the slips 22 are opened, the packer seat is clamped on the sleeve, the lower lock ring 33 and the lower lock sleeve 36 simultaneously generate relative displacement to lock the lower sealing rubber sleeve group 42, at the moment, the gas injection packer completes functions of setting, anchoring, locking and the like, and the requirement of shaft isolation on a construction site is met.
And (3) deblocking process: and when the lifting force is greater than the shearing force of the pins, the pins are sheared, the supporting ring 34 falls, the lower lock ring 33 loses support, the rubber barrel is recovered by self elasticity, the lower cone 24 descends, and the packer is unpacked and released.
Claims (9)
1. Coiled tubing gas injection packer suitable for oil field gas injection technology uses in pit, a serial communication port, including center tube (2), screwed connection has upper junction (1) and lower junction (32) respectively at center tube (2) both ends, upper junction (1) and lower junction (32) between overlap from the top down in proper order are equipped with upper piston group (39), slips cover (23) and lower piston group (41), upper seal packing element group (40) are equipped with to cover between upper piston group (39) and upper junction (1), upper piston group (39) are last to open has feed liquor hole A (43), lower seal packing element group (42) are equipped with to cover between lower piston group (41) and slips cover (23), lower piston group (41) are last to open has feed liquor hole B (44), slips (22) are equipped with in slips cover (23) and center tube (2) intermediate level cover.
2. The coiled tubing gas injection packer suitable for the oilfield downhole gas injection process according to claim 1, wherein the upper-level sealing packing element group (40) comprises a side packing element I (6), a spacer ring I (7), a middle packing element (8), a spacer ring II (9) and a side packing element II (10) which are sequentially sleeved on the central tube (2) from top to bottom, and a shoulder protector I (5) is arranged at one end, close to the upper joint (1), of the side packing element I (6);
A cone ring I (4) is sleeved between the upper sealing rubber cylinder group (40) and the upper joint (1), and a protection block I (3) is assembled between the cone ring I (4) and the upper joint (1);
One end of the side rubber cylinder II (10) far away from the upper joint (1) is provided with a shoulder protecting II (11), a conical ring II (12) is sleeved between the upper-stage sealing rubber cylinder group (40) and the upper-stage piston group (39), and a protecting block II (13) is assembled between the conical ring II (12) and the upper-stage piston group (39).
3. The coiled tubing gas injection packer suitable for use in an oilfield downhole gas injection process according to claim 2, wherein the upper piston group (39) comprises an upper packing element seat (14), one end of the upper packing element seat (14) is connected with a protection block ii (13), an upper piston (15) in threaded connection with a central tube (2) is arranged at the other end of the upper packing element seat (14), the upper piston (15) is connected with an upper locking ring seat (18), an upper locking sleeve (17) is in threaded connection with the periphery of the upper piston (15) and the upper locking ring seat (18), the upper locking sleeve (17) is connected with an upper cone (20) through an upper setting pin (19), one end of the upper locking ring seat (18) far away from the upper piston group (39) is in threaded connection with the upper cone (20), the upper cone (20) is fixed on the central tube (2) through an upper cone pin (21), and the upper locking ring seat (18) is provided with an upper locking ring (16).
4. The coiled tubing gas injection packer suitable for the oilfield downhole gas injection process according to claim 1, wherein the lower-stage sealing rubber cylinder group (42) comprises a shoulder protector III (25), a lower-stage rubber cylinder I (26), a spacer ring III (27), a lower-stage rubber cylinder II (28) and a shoulder protector IV (29) which are sleeved on the central tube (2) in sequence from top to bottom;
The lower piston group (41) comprises a lower rubber cylinder seat (30), wherein a steel sleeve (31) is connected to the periphery of the lower rubber cylinder seat (30) in a threaded manner, and a lower lock sleeve (36) is connected to one end of the steel sleeve (31) far away from the lower rubber cylinder seat (30) in a threaded manner.
5. Coiled tubing gas injection packer suitable for use in oilfield downhole gas injection process according to claim 4, wherein the steel sleeve (31) and the lower lock sleeve (36) are sleeved outside the lower joint (32), the lower joint (32) is in threaded connection with the central tube (2), the lower lock ring (33) is sleeved on the middle layer of the lower joint (32) and the steel sleeve (31), a support ring (34) is arranged below the lower lock ring (33), the support ring (34) is fixed on the lower joint (32) through a deblocking pin (35), a shear pin seat (38) is in threaded connection with one end of the lower joint (32) far away from the lower piston group (41), a lower setting pin (37) is installed in the shear pin seat (38), and the lower lock sleeve (36) is connected with the shear pin seat (38) through the lower setting pin (37).
6. The coiled tubing gas injection packer suitable for use in an oilfield downhole gas injection process according to claim 1, wherein the slips (22) are sleeved on the middle layer of the slip sleeve (23) and the central tube (2), two ends of the slips are respectively fixed on the upper cone (20) and the lower cone (24) by fixing pins, and the lower cone (24) is sleeved on the central tube (2) and is in threaded connection with the shoulder protector iii (25).
7. The coiled tubing gas injection packer for use in an oilfield downhole gas injection process of claim 6, wherein the slips (22) are uniformly distributed at 90 ° using a concentric slip double cone anchoring configuration with a total of 4 slips.
8. A coiled tubing gas injection packer adapted for use in a downhole gas injection process in an oilfield according to claim 3, wherein the upper lock ring (16) and the lower lock ring (33) are two sets of single-sided thread step-locked lock rings.
9. The coiled tubing gas injection packer for use in an oilfield downhole gas injection process according to claim 1, wherein the upper joint (1) and the central tube (2) are sealed with an end metal seal, an upper tetrafluoro gasket, and hydrogenated nitrile rubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323031509.6U CN221074185U (en) | 2023-11-09 | 2023-11-09 | Coiled tubing gas injection packer suitable for oil field underground gas injection process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323031509.6U CN221074185U (en) | 2023-11-09 | 2023-11-09 | Coiled tubing gas injection packer suitable for oil field underground gas injection process |
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| Publication Number | Publication Date |
|---|---|
| CN221074185U true CN221074185U (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323031509.6U Active CN221074185U (en) | 2023-11-09 | 2023-11-09 | Coiled tubing gas injection packer suitable for oil field underground gas injection process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074185U (en) |
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2023
- 2023-11-09 CN CN202323031509.6U patent/CN221074185U/en active Active
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