CN220769427U - Upward-channeling preventing device for airtight swabbing process of gas well - Google Patents
Upward-channeling preventing device for airtight swabbing process of gas well Download PDFInfo
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- CN220769427U CN220769427U CN202322544766.3U CN202322544766U CN220769427U CN 220769427 U CN220769427 U CN 220769427U CN 202322544766 U CN202322544766 U CN 202322544766U CN 220769427 U CN220769427 U CN 220769427U
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- central shaft
- damping
- tail tube
- claw
- gas well
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000013016 damping Methods 0.000 claims abstract description 74
- 210000000078 claw Anatomy 0.000 claims abstract description 55
- 210000002445 nipple Anatomy 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 description 25
- 239000007789 gas Substances 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 230000005465 channeling Effects 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Abstract
The utility model discloses an upward-shifting prevention device for a gas well closed swabbing process, which comprises a salvaging head, damping clamping jaws and a central shaft, wherein the salvaging head is fixedly connected to the front end of the central shaft; the tail tube is sleeved on the central shaft and positioned behind the damping claw, the front end of the tail tube is milled into an inclined plane to form a damping expansion wedge, and the damping claw is pushed to open when the tail tube slides along the central shaft to the damping claw; the rear part of the tail tube is connected with a weighting rod connecting piece for installing a weighting rod. The utility model utilizes the impulsive force caused by blowout to open the damping claw to clamp the outer wall, thereby reducing the running speed of the suction tool, not only preventing complex underground accidents caused by steel wire twisting, but also preventing blowout accidents caused by high-speed impact of the sealed suction tool on the lubricator.
Description
Technical Field
The utility model belongs to the technical field of petroleum and natural airtight suction drainage gas production equipment, and particularly relates to an upward-channeling preventing device for an airtight pumping process of a gas well.
Background
The stable and improved natural gas yield is the primary task in front of us, and typical processes for natural gas exploitation include plunger drainage gas production process, foam drainage gas production process, closed pumping process and the like. In recent years, with the continuous deep oil and gas exploration, most of geological reserves are low-permeability oil and gas reservoirs, low-yield wells are more, and due to low yield, the conventional gas production mode adopted by the wells has large investment and low system efficiency, so that the economic benefit is poor, a large number of low-yield wells are shut in, and the residual potential of the gas wells is difficult to excavate. Production practices of low-yield wells at home and abroad show that the closed pumping process is an effective gas production mode for developing the low-yield wells. The traditional airtight pumping technology is being developed into an important technology for drainage and gas production of a natural gas well, and is important for low-yield, low-efficiency and serious integrated gas well production. The existing closed pumping technology is improved in the traditional oil-fishing technology, is mainly suitable for the lubricating environment of oil-water mixed fluid, and has poor adaptability in the drainage environment of a gas well with high mineralization degree, high water content and high formation pressure. The existing upward-shifting-preventing tool unlocking mechanism and damping claw teeth are unreasonable in design, and are easy to be blocked and not unlocked, so that complex underground accidents are caused.
In a high-pressure gas well, the pumping action changes the flow rate of the well liquid, so that the pressure of the liquid column in the well is changed, the pressure is abnormal or blowout is caused, the performance of pumping operation equipment and matched tools is verified and optimized, and the well mouth is sealed, safe and free of leakage in the pumping process.
Due to the harsh downhole production environment, there are some uncertainties, such as formation pressure anomalies, that exceed the extent of wellhead control. This may be caused by the fact that the natural gas pressure in the stratum is excessively high, the stratum is cracked, the pressure is dissipated or the stratum is abnormal, and the situation can cause serious tool string channeling in the operation process, seriously affect the operation quality, and cause safety problems such as the tool string rushing out of a wellhead. In addition, during natural gas production, the well fluid and natural gas form a gas-liquid two-phase flow in the wellbore. If the gas-liquid separation process is out of control, so that the proportion of gas in the well liquid increases, blowout can also be caused. Aiming at the upward channeling of a tool string caused by the problem of abnormal underground pressure, the addition of an upward channeling prevention nipple is indispensable. The anti-channeling damping nipple is one of important mechanisms for realizing safe drainage and gas production functions of the whole tool string, and whether the mechanism is reliable or not seriously influences the safety of personnel and uphole and downhole equipment in the whole oil production process.
In conventional closed pumping and drainage processes, if a natural gas well experiences a downhole pressure anomaly, some drawbacks and challenges are created for the pumping tool, including: downhole pressure anomalies may cause the pumping tool to experience additional pressure and shock, increasing the risk of the tool twisting up the wire. Excessive pressure difference can cause the tool string to run away and collide with the gas production wellhead at a high speed and other mechanical faults, so that the normal operation of the tool is affected; under high pressure, gas, liquids and solids in the well may cause drag on the pumping tool, causing the tool to seize or fail to function properly. This may require additional maintenance and intervention, increasing the complexity of the operation; in case of pressure anomalies, the operator may be faced with higher safety risks. Sudden pressure changes can cause sudden upward movement of tools or accidents, which threatens the safety of operators; when a downhole pressure anomaly occurs, the pumping tool may not be able to perform liquid pumping stably, resulting in a decrease in production efficiency. To cope with this, it may be necessary to reduce the extraction rate or to halt production, resulting in an affected natural gas production.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model aims to provide an upward channeling preventing device for a closed pumping process of a gas well, so as to reduce the running speed of a pumping tool, and further avoid blowout accidents caused by the fact that the closed pumping tool impacts a lubricator at a high speed.
The technical purpose of the utility model is realized by the following technical scheme:
an upward-channeling preventing device for a closed pumping process of a gas well comprises a salvaging head, a damping claw and a central shaft;
the fishing head for placing and fishing the pumping tool is fixedly connected to the front end of the central shaft, the central shaft is of a cylindrical structure, the sleeve is sleeved on the central shaft, the sleeve and the central shaft are in clearance fit and can axially slide along the central shaft, a sliding groove is axially formed in the central shaft, and the tail end of a pin shaft penetrating through one side wall of the sleeve along the radial direction of the sleeve is arranged in the sliding groove; the cylindrical surface of the central shaft is milled with three planes for accommodating damping claws along the axial equal included angle;
the three damping claws are arranged at three planes milled by the central shaft, one ends of the damping claws are respectively connected with one end of the sleeve through shafts, the damping claws can swing along the shafts, the central shaft is sleeved with clearance fit reset springs, and the reset springs are positioned between the fishing head and the sleeve; the tail tube is sleeved on the central shaft and positioned behind the damping claw, the front end of the tail tube is milled into an inclined plane to form a damping expansion wedge, and the damping claw is pushed to open when the tail tube slides along the central shaft to the damping claw; and a weighting rod connecting piece for installing a weighting rod is connected to the rear of the tail tube.
Further preferably, the fishing head has a cylindrical structure, a threaded hole is formed in the radial direction from the cylindrical surface, and the fishing head is fixedly installed with the central shaft through a bolt penetrating through the threaded hole.
Further preferably, the middle cylinder of the fishing head cuts off two sides, so that the fishing head is smaller at the top and larger at the bottom.
Further preferably, the surface of the central shaft sleeved with the tail tube position is provided with a guide groove, the inner side of the wall of the tail tube is provided with a bulge, and the bulge is arranged in the guide groove to form a tail tube positioning structure.
Further preferably, a saw tooth like damping tooth structure is provided outside the damping jaw.
Further preferably, the central shaft is sleeved with a ferrule, and the ferrule is arranged at the tail part of the central shaft and fixed through a screw and used for preventing the tail tube from slipping off the central shaft.
Further preferably, the weighting rod connecting piece is of a cylindrical structure which is connected to the tail end of the central shaft in a threaded mode, the central shaft is internally provided with an adjusting short section through threads, and the adjusting short section can be screwed into the weighting rod connecting piece through threads to adjust the position of displacement.
The utility model has the following beneficial effects:
the utility model utilizes the damping claw structure, and the impact force caused during blowout causes the damping claw to open to clamp the outer wall, thereby reducing the running speed of the suction tool, preventing complex underground accidents caused by steel wire twisting, and preventing blowout accidents caused by high-speed impact of the closed suction tool on the lubricator.
The pumping tool has the advantages of few structural parts, low complexity of workpieces, easy material finding, simple processing, greatly prolonged tool service time, low cost, low hand-up difficulty and greatly improved working efficiency; the utility model also designs the blowout prevention damping claw structure, which ensures the safety of workers by one more step, thereby improving the efficiency.
Compared with the prior art, the airtight suction channeling-preventing tool for the gas well provided by the utility model has the following advantages and improvements:
(1) The upward-shifting prevention tool can play a role in upward lifting and downward smashing bidirectional deblocking, and the risk of complex accidents caused by tool blocking can be reduced to the greatest extent;
(2) The return spring and the damping tooth structure can effectively avoid tool string blocking caused by contact expansion of the damping claw and the protrusion of the oil pipe wall in the well descending process; the device has a certain sliding buffer process, the process is that the oil pipe wall is embedded into the sliding for reducing the speed, the joint hoop is blocked, and the complex accident that the steel wire is broken due to instant blocking in the blowout process can be avoided.
(3) The device for preventing the upward movement of the closed pumping process of the adjusting threaded gas well can adjust the travel of the damping claw, further control the expansion outer diameter of the damping claw, and further adjust and adapt to different well conditions.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic view of a return spring of the present utility model;
FIG. 3 is a schematic cross-sectional view of a damping pawl of the present utility model;
FIG. 4 is a partial cross-sectional view of the fishing head of the present utility model;
FIG. 5 is a schematic of the central axis of the present utility model;
FIG. 6 is a schematic cross-sectional view of a sleeve of the present utility model;
FIG. 7 is a schematic cross-sectional view of the transition piece of the present utility model;
FIG. 8 is a schematic cross-sectional view of an adjustment nipple of the present utility model;
FIG. 9 is a schematic cross-sectional view of a weighted rod attachment of the present utility model;
FIG. 10 is a schematic cross-sectional view of the central shaft of the present utility model;
wherein: 1-a salvaging head; 2-a central axis; 3-sleeve; 4-damping jaws; 5-tail tube; 6-a ferrule; 7-adjusting the pup joint; 8-a weighted rod connector; 9-pin shaft.
Detailed Description
The following description of the embodiments of the present utility model will be made by referring to the drawings, in which the embodiments of the present utility model are shown, it being apparent that the embodiments described are only some, but not all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in figure 1, the utility model designs an upward-flowing preventing device for a gas well closed pumping process, which consists of a salvaging head 1, a damping claw 4, a central shaft 2, a sleeve 3, a ferrule 6, a pin, a tail tube 5, a ferrule 6, a pin and the like.
As shown in fig. 4, the fishing head 1 for placing and fishing the pumping tool is cylindrical, a threaded hole is formed in the radial direction from the surface of the cylinder, and the fishing head 1 is fixedly installed with the central shaft through a bolt penetrating through the threaded hole, so that the two sides of the fishing head 1 are cut off in the middle cylinder to be small in top and large in bottom, and the fishing is more convenient.
As shown in fig. 5, 6 and 10, the central shaft 2 is in a cylindrical structure, the sleeve 3 is sleeved on the central shaft 2, the central shaft is in clearance fit with the sleeve, the sleeve can axially slide along the central shaft 2, in order to avoid the circumferential rotation of the sleeve 3 and influence the position of the damping claw 4, a chute is axially formed on the central shaft 2, the tail end of a pin shaft 9 penetrating through one side wall of the sleeve 3 along the radial direction of the sleeve 3 is arranged in the chute, and the sleeve 3 determines a track on the central shaft 2 under the action of the pin shaft 9; the cylindrical surface of the central shaft 2 is milled with three planes for accommodating the damping jaw 4 along the axial equal included angle.
As shown in fig. 3, three damping claws 4 are arranged at three planes milled on the surface of the central shaft 2, one ends of the damping claws are respectively connected with one end of the sleeve 3 in a shaft manner and can swing along the shaft, gaps are formed between the damping claws 4 and the sleeve 3, the damping claws 4 are favorable to being opened, a reset spring as shown in fig. 2 is sleeved on the central shaft 2 and positioned between the fishing head and the sleeve 3, the diameter of the reset spring is slightly larger than that of the central shaft 2, and the clearance fit is achieved, so that the damping claws 4 can be smoothly stretched. When the wedge is crashed down, the reset spring is contracted, so that the central rod can be collided down to the adjusting pup joint, the damping expansion wedge is forced to move downwards, the clamping claw is retracted, and the anchoring is released. If the damping claw scrapes the pipe wall, the damping claw moves upwards after compressing the return spring, so that the damping claw is prevented from being opened and blocked, and when the damping claw is no longer scraped with the well wall, the return spring forces the claw to reset. In order to improve the friction force of the damping claw 4, a sawtooth damping tooth structure is arranged on the outer side of the damping claw 4, and the anchoring effect of the damping claw 4 on the inner wall of the oil pipe is more outstanding after the damping claw 4 is opened.
As shown in fig. 7, the tail tube 5 is sleeved on the central shaft 2 and located behind the damping jaw 4, the front end of the tail tube 5 is milled into an inclined plane to form a damping expansion wedge, when the tail tube 5 slides along the central shaft 2 to the damping jaw 4, the damping jaw 4 is opened, the surface of the central shaft 2, sleeved with the tail tube 5, is provided with a guide slot, the inner side of the wall of the tail tube 5 is provided with a bulge, and the bulge is arranged in the guide slot to form a tail tube 5 positioning structure. The central shaft 2 is sleeved with a ferrule 6, and the ferrule 6 is arranged at the tail part of the central shaft and fixed by a screw and used for blocking the sliding distance of the tail tube 5 and avoiding the slipping of the tail tube 5 and the central shaft 2.
As shown in fig. 9 and 8, the rear of the tail tube 5 is connected with a weighting rod connecting piece 8, the weighting rod connecting piece 8 is of a cylindrical structure which is in threaded connection with the tail end of the central shaft 2, an adjusting nipple 7 is arranged in the central shaft 2, the adjusting nipple 7 can adjust the position in the weighting rod connecting piece 8 through threads, and the stroke of a damping expansion wedge can be adjusted by changing the length of the weighting rod connecting piece 8 under the extension of the adjusting nipple 7, so that the expansion degree of the damping claw 4 is adjusted, the expansion outer diameter of the damping claw 4 is controlled, and the damping claw is applicable to different pipe diameters. If necessary, a weighting rod is connected to achieve the purpose of weighting. The upper end of the central shaft 2 is connected with a salvaging head, the lower end is connected with a tail tube 5, when the pumping tool ascends, the damping claw 4 is opened and firmly clamped on the inner wall of the sleeve, the upper channeling of the sleeve is prevented, and the damping claw 4 is loosened by lifting.
The anti-channeling device of the gas well closed pumping process is mainly realized by a damping claw and a damping expansion wedge, wherein the damping claw is kept in a furled state in the descending or lifting process of a tool string; during normal descending and lifting of the drawer, the damping claw is in a contracted state due to the gravity action of the lower weighting rod. When blowout happens, the gas-liquid at the lower part can move upwards against the pump; when the upward movement speed of the swab is higher than the normal movement speed of the steel wire rope, the damping claw moves relative to the cone, and the damping claw is pushed out and anchored on the inner wall of the oil pipe, so that the friction force between the tool string and the inner wall of the oil pipe is greatly increased, the tool string is effectively prevented from being quickly moved upwards to cause twisting of the steel wire rope, and the swabbing tool is prevented from being moved upwards; when the wire line is continued to be lifted, the damping pawl retracts relative to the cone, releasing the anchoring and may continue to travel up the wellhead.
The preferred embodiments of the utility model disclosed above are intended only to illustrate the utility model by the editorial staff. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model.
Claims (7)
1. The utility model provides a gas well airtight swabbing technology prevents scurring device which characterized in that: comprises a salvaging head (1), a damping claw (4) and a central shaft (2);
the fishing head (1) for placing and fishing the swabbing tool is fixedly connected to the front end of a central shaft, the central shaft (2) is of a cylindrical structure, the sleeve (3) is sleeved on the central shaft (2), the sleeve (3) and the central shaft (2) are in clearance fit and can axially slide along the central shaft (2), a chute is axially formed in the central shaft (2), and the tail end of a pin shaft (9) penetrating through one side wall of the sleeve (3) along the radial direction of the sleeve (3) is arranged in the chute; the cylindrical surface of the central shaft (2) is milled with three planes for accommodating the damping claw (4) along the axial equal included angle;
the three damping claws (4) are arranged at three planes milled by the central shaft (2), one ends of the damping claws are respectively connected with one end of the sleeve (3) through shafts, the damping claws can swing along the shafts, the central shaft (2) is sleeved with clearance fit reset springs, and the reset springs are positioned between the fishing head and the sleeve (3); the tail tube (5) is sleeved on the central shaft (2) and positioned behind the damping claw (4), an inclined plane is milled at the front end of the tail tube (5) to form a damping expansion wedge, and the damping claw (4) is pushed to open when the tail tube (5) slides along the central shaft (2) to the damping claw (4); and a weighting rod connecting piece (8) for installing a weighting rod is connected to the rear of the tail tube (5).
2. The gas well containment swab process anti-channeling device of claim 1, wherein: the fishing head (1) is of a cylindrical structure, a threaded hole is formed in the radial direction from the cylindrical surface, and the fishing head (1) is fixedly arranged with the central shaft (2) through a bolt penetrating through the threaded hole.
3. The gas well containment swab process anti-channeling device of claim 2, wherein: the middle cylinder of the salvaging head cuts off two sides, so that the salvaging head (1) is small in upper part and large in lower part.
4. A gas well containment swab process anti-channeling device according to claim 2 or 3, wherein: the surface of the central shaft (2) sleeved with the tail tube (5) is provided with a guide groove, the inner side of the wall of the tail tube (5) is provided with a bulge, and the bulge is arranged in the guide groove to form a tail tube (5) positioning structure.
5. The gas well containment swab process anti-channeling device of claim 4, wherein: the outer side of the damping claw (4) is provided with a serrated damping tooth structure.
6. The gas well containment swab process anti-channeling device of claim 4, wherein: the central shaft (2) is sleeved with a ferrule (6), and the ferrule (6) is arranged at the tail part of the central shaft and fixed through a screw and used for preventing the tail tube (5) from slipping off the central shaft (2).
7. The gas well containment swab process anti-channeling device of claim 4, wherein: the weighting rod connecting piece (8) is of a cylindrical structure which is connected with the tail end of the central shaft (2) in a threaded mode, the central shaft (2) is internally provided with an adjusting nipple (7) through threads, and the adjusting nipple (7) can adjust the position in the weighting rod connecting piece (8) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322544766.3U CN220769427U (en) | 2023-09-19 | 2023-09-19 | Upward-channeling preventing device for airtight swabbing process of gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322544766.3U CN220769427U (en) | 2023-09-19 | 2023-09-19 | Upward-channeling preventing device for airtight swabbing process of gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220769427U true CN220769427U (en) | 2024-04-12 |
Family
ID=90609853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322544766.3U Active CN220769427U (en) | 2023-09-19 | 2023-09-19 | Upward-channeling preventing device for airtight swabbing process of gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220769427U (en) |
-
2023
- 2023-09-19 CN CN202322544766.3U patent/CN220769427U/en active Active
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