CN212479139U - Boosting fishing tool for downhole steel wire operation of gas well - Google Patents
Boosting fishing tool for downhole steel wire operation of gas well Download PDFInfo
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- CN212479139U CN212479139U CN202021367863.XU CN202021367863U CN212479139U CN 212479139 U CN212479139 U CN 212479139U CN 202021367863 U CN202021367863 U CN 202021367863U CN 212479139 U CN212479139 U CN 212479139U
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Abstract
The utility model discloses a stressing fishing tool for gas well underground steel wire operation, which comprises a stressing device, a jar and a fishing barrel which are sequentially connected from top to bottom; the force applying device comprises an outer barrel and a first connecting shaft arranged in the outer barrel along the axial direction, the first connecting shaft is provided with a rope winding fixed point and at least one pulley axle center, and the rope winding fixed point is positioned below the pulley axle center; a fixed pulley block and a movable pulley block are also arranged in the outer barrel, the fixed pulley block is arranged on a pulley axle center, and the movable pulley block is arranged below the first connecting shaft; self-winding ropeThe rope fixing point sequentially winds the movable pulley and the fixed pulley at intervals from near to far, and finally the rope is discharged from the movable pulley, and the rope discharging end of the rope is connected with a wellhead steel wire; n is a radical ofFixed pulley≥1，NMovable pulleyNot less than 2 and NMovable pulley＝NFixed pulley+1，NFixed pulleyNumber of crown blocks, NMovable pulleyThe number of the movable pulleys. Has the advantages of large tension, low cost and the like.
Description
Technical Field
The utility model belongs to the technical field of the operation in the pit, a gas well is afterburning fishing tool for steel wire operation in pit is related to.
Background
At present, the gas well underground throttling technology becomes one of the key technologies for developing low-pressure and low-gas production fields, is generally applied to the initial production stage of a gas well, and has the important function of low-pressure gas collection. In the middle and later stages of gas field production, technological measures such as drainage and gas production need to be carried out, so that the throttler needs to be fished out, steel wire operation is generally adopted, and if the underground throttler cannot be fished out in time, drainage and gas production measures such as foam drainage, speed pipe column and plunger gas lift cannot be implemented on part of low-pressure water producing gas wells, so that the yield of the gas wells is low or the gas wells are stopped.
In the current commonly used choke salvaging technology, the pulling force provided by the conventional steel wire operation is small, the situation that the construction cannot be performed and the salvaging success rate is low easily occurs. Although the tension of the coiled tubing is large, the coiled tubing cannot be vibrated and can only be pulled statically, for some throttles which cannot be unsealed, the structure of the throttles can be damaged by forced static pulling, even the oil tube is damaged, so that shaft accidents and the like are caused, and the fishing cost of the coiled tubing is too high. Therefore, a fishing tool for the downhole choke with high tension and low cost is urgently needed at a production site.
Disclosure of Invention
The utility model provides a problem provide a gas well is afterburning fishing tool for wire operation in pit for solve the pulling force that conventional wire operation provided less and coiled tubing is with high costs problem.
The utility model discloses a realize through following technical scheme:
a stress application fishing tool for downhole steel wire operation of a gas well comprises a stress application device, a jar and a fishing barrel which are sequentially connected from top to bottom; the force applying device comprises an outer barrel and a first connecting shaft arranged in the outer barrel along the axial direction, the first connecting shaft is provided with a rope winding fixed point and at least one pulley axle center, and the rope winding fixed point is positioned below the pulley axle center; a fixed pulley block and a movable pulley block are further arranged in the outer barrel, the fixed pulley block is arranged on the pulley axle center, the movable pulley block is arranged below the first connecting shaft, the fixed pulley block comprises a plurality of fixed pulleys, and the movable pulley block comprises a plurality of movable pulleys; the winding rope sequentially winds the movable pulley and the fixed pulley at intervals from near to far from a rope winding fixing point, finally the rope is discharged from the movable pulley, and the rope discharging end of the rope is connected with a wellhead steel wire; wherein N isFixed pulley≥1，NMovable pulleyNot less than 2 and NMovable pulley＝NFixed pulley+1，NFixed pulleyIs the number of the fixed pulleys, NMovable pulleyThe number of the movable pulleys.
The rope winding fixing point is located at the bottom of the first connecting shaft, and the bottom of the first connecting shaft is far away from the movable pulley block.
The movable pulley fixing device further comprises a second connecting shaft for fixing the axes of the movable pulleys, and the axes of the movable pulleys are distributed on the second connecting shaft; the lower end of the second connecting shaft is connected with the upper end of the jar through a first screw thread.
The axes of the fixed pulleys and the movable pulleys are on the axis of the outer cylinder.
The size of the fixed pulley and the size of the movable pulley are gradually larger along with the distance from the rope winding fixed point.
The upper port of the outer barrel is also provided with a guide wheel used for adjusting the direction of the rope outlet end.
The winding rope is a flexible rope.
The lower end of the jar is connected with the upper end of the overshot through a second screw thread.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses set up thrust augmentation device at conventional fishing tool head, be provided with crown block and running block in thrust augmentation device's the urceolus, the crown block sets up on the pulley shaft center of first connecting axle, and the running block setting is in the below of urceolus first connecting axle, and the wiring fixed point sets up on first connecting axle and is located the below in pulley shaft center, and the crown block includes a plurality of fixed pulley, and the running block includes a plurality of running pulley. The rope winding is wound around the movable pulley and the fixed pulley from a rope winding fixed point to a place from near to far in sequence at intervals, the rope is finally discharged from the position of the movable pulley, the rope discharging end of the rope winding is connected with a wellhead steel wire, the fixed pulley and the movable pulley are used together because the fixed pulley can change the direction of force but cannot save labor, the movable pulley cannot change the direction of force but can save half of the force at most, after the rope winding and the fixed pulley are combined, the force application direction can be saved and changed, the rope winding and the fixed pulley are connected in series, the force transmitted to the jar knocker can be increased to be several times of the tensile force of the ground winch under the condition that the tensile force of the ground steel wire is not changed, and the rope winding is specifically determined according to the number of pulleys.
During fishing, the fishing tool is put into the well through a steel wire, anchored to the inner wall of an oil pipe or a casing pipe, put to a preset position and then hit upwards, the upper shear pin is cut off, meanwhile, the device is anchored, the fishing tool is continuously lifted, and the fishing claw tightly grasps the central pipe or the fishing neck of the underground tool to finish fishing work.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a middle force application device of the present invention;
FIG. 3 is a partial enlarged view of the middle force applying device of the present invention;
FIG. 4 is a schematic structural view of the middle jar of the present invention;
fig. 5 is a schematic structural view of the overshot of the present invention;
FIG. 6 is a partial enlarged view of the overshot of the present invention;
in the figure, 1-a force application device, 11-an outer cylinder, 12-a first connecting shaft, 121-a rope winding fixed point, 122-a pulley shaft center, 13-a fixed pulley group, 131-a first fixed pulley, 132-a second fixed pulley, 133-a third fixed pulley, 14-a movable pulley group, 141-a first movable pulley, 142-a second movable pulley, 143-a third movable pulley, 144-a fourth movable pulley, 15-a rope winding, 16-a second connecting shaft and 17-a guide wheel; 2-a jar; 3-fishing barrel, 31-center rod, 32-anchoring mechanism and 33-fishing claw.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a stressing fishing tool for downhole steel wire operation of a gas well, which is shown in figure 1 and figure 2 and comprises a stressing device 1, a jar 2 and a fishing barrel 3 which are sequentially connected from top to bottom; the force adding device 1 comprises an outer cylinder 11 and a first connecting shaft 12 arranged in the outer cylinder 11 along the axial direction, wherein a rope winding fixing point 121 and at least one pulley axle center 122 are arranged on the first connecting shaft 12, and the rope winding fixing point 121 is positioned below the pulley axle center 122; a fixed pulley block 13 and a movable pulley block 14 are further arranged in the outer barrel 11, the fixed pulley block 13 is arranged on the pulley axis 122, the movable pulley block 14 is arranged below the first connecting shaft 12, the fixed pulley block 13 comprises a plurality of fixed pulleys, and the movable pulley block 14 comprises a plurality of movable pulleys; the winding rope 15 sequentially winds the movable pulley and the fixed pulley from the winding rope fixing point 121 from near to far at intervals, finally goes out of the movable pulley, and the rope outlet end of the winding rope is connected with a wellhead steel wire; wherein N isFixed pulley≥1，NMovable pulleyNot less than 2 and NMovable pulley＝NFixed pulley+1，NFixed pulleyIs the number of the fixed pulleys, NMovable pulleyThe number of the movable pulleys.
The utility model discloses set up thrust augmentation device 1 at conventional fishing tool head, be provided with fixed pulley group 13 and running block 14 in thrust augmentation device 1's urceolus 11, fixed pulley group 13 sets up on the pulley axle center 133 of first connecting axle 14, running block 14 sets up the below of first connecting axle 12 in urceolus 11, wiring fixed point 121 sets up on first connecting axle 12 and is located the below of pulley axle center 122, fixed pulley group 13 includes a plurality of fixed pulley, running block 14 includes a plurality of running pulley. The rope winding 15 sequentially winds the movable pulley and the fixed pulley from near to far from the rope winding fixing point 121 at intervals, the rope is finally discharged from the position of the driven pulley, the rope discharging end of the rope winding is connected with a wellhead steel wire, the fixed pulley and the movable pulley are used together because the direction of the force can be changed by the fixed pulley, but the force cannot be saved, but the direction of the force cannot be changed by the movable pulley, but half of the force can be saved at most, after the rope winding and the movable pulley are combined, the force can be saved and the force direction can be changed, the rope winding 15 is used for connecting the rope winding and the movable pulley in series, under the condition that the tensile force of the ground steel wire is not changed, the force transmitted to the jar 2 can be increased to be several times of the tensile force of the ground winch. Compared with the traditional fishing tool, the fishing tool has larger pulling force and higher success rate in unconventional fishing operation.
During fishing, the fishing tool is put into the well through a steel wire, anchored to the inner wall of an oil pipe or a casing, put to a preset position and then hit upwards, the upper shear pin is cut off, meanwhile, the device is anchored, the fishing tool is continuously lifted, and the fishing claw 33 grabs the central pipe or the fishing neck of the underground tool to finish fishing work.
In order to extend the travel of the movable pulley block 14 to provide a longer pulling force, the rope winding fixing point 121 needs to be located as far as possible from the movable pulley at the uppermost end of the movable pulley block 14, so that the rope winding fixing point 121 is located at the bottom of the first connecting shaft 12, and the bottom of the first connecting shaft 12 is located far from the movable pulley block 14.
The movable pulley fixing device further comprises a second connecting shaft 16 for fixing the axes of the plurality of movable pulleys, and the axes of the plurality of movable pulleys are distributed on the second connecting shaft 16; the lower end of the second connecting shaft 16 is connected with the upper end of the jar 2 through a first screw thread. A plurality of movable pulleys move up and down along with the second connecting shaft 16 simultaneously, so as to ensure the orderliness and the stability of the plurality of movable pulleys in the up-and-down movement. All the movable pulleys are fixed on the second connecting shaft 16, the distance between the movable pulleys is fixed, and the problem that the relative distance changes in the moving process cannot occur. And the lower end of the second connecting shaft 16 is changed into a screw thread by a hook and is a female thread, the upper end of the jar 2 is also a screw thread and is a male thread, and the male thread and the female thread are tightly connected when the jar is used.
The axes of the fixed pulleys and the movable pulleys are all arranged on the axis of the outer barrel 11, so that the force multiplied by the movable pulley block 14 is ensured to be as large as possible.
In order to facilitate the winding of the rope 15 around the pulley block, the size of the fixed and movable pulleys becomes larger as the distance from the rope winding fixing point 121 increases, i.e. the size of the fixed and movable pulleys near the rope winding fixing point 121 is smaller and the size of the fixed and movable pulleys near the rope winding fixing point 121 is larger, so as to leave a winding space for the rope 15. Firstly, the radiuses of the pulleys in the pulley block are different, so that the rope winding 15 cannot be crossed and knotted in the working process; in the construction process, all the ropes 15 are subjected to a considerable tensile force and are in a tight state, and the mutual knotting does not exist.
As shown in fig. 2, in order to reduce the loss of the wire working tension, the upper end of the outer cylinder 11 is further provided with a guide wheel 17 for adjusting the direction of the rope outlet end, so as to ensure that the rope 15 can be discharged from the axis of the outer cylinder 11.
Preferably, N in the present invention Fixed pulley3, a first fixed pulley 131, a second fixed pulley 132, and a third fixed pulley 133; n is a radical ofMovable pulleyAnd 4, a first movable pulley 141, a second movable pulley 142, a third movable pulley 143, and a fourth movable pulley 144, respectively, as shown in fig. 3. The rope winding 15 starts from the rope winding fixing point 121, passes through the first movable pulley 141, the first fixed pulley 131, the second movable pulley 142, the second fixed pulley 132, the third movable pulley 143, the third fixed pulley 133 in sequence, finally passes through the fourth movable pulley 144, then goes out, and then the rope outlet end is connected to the wellhead steel wire through the guide pulley 17. The number of the guide wheels 17 can be multiple, and is determined according to the angle required to be adjusted.
More preferably, the winding rope 15 is a flexible rope, and the constraint of the object by a flexible body such as a rope, a chain, a belt, etc. is called flexible rope, i.e. flexible constraint. Compared with rigid constraint, flexible constraint can keep a constrained object in a certain motion space, so that the constrained object has certain displacement, and the strength of the constraint depends on the rigidity of the flexible constraint.
The lower end of the jar 2 is connected with the upper end of the overshot 3 through a second screw thread.
The utility model provides a pair of afterburning fishing tool is used in steel wire operation in gas well pit, its fishing method, including following operation: and (3) lowering the downhole steel wire operation of the gas well downhole into the downhole by a ground winch by using a stress application fishing tool, shearing the upper shear pin and anchoring the upper shear pin after the stress application fishing tool reaches the upper part of the throttler, then lifting the fishing tool, and tightly gripping the throttler by using a fishing claw 33 at the bottom of the fishing barrel 3.
The ground winch tightens the steel wire, the steel wire drives the movable pulley block 14 in the force applying device 1 to move upwards, and simultaneously drives the jar 2 and the central rod 31 of the fishing barrel 3 to move upwards together, as shown in fig. 4, 5 and 6, when the tensile force reaches the release pressure of the jar 2, the jar 2 is released instantly, so that the throttle is unlocked.
The fishing tool can be lifted out of the choke by continuously lifting the fishing tool.
When the deblocking of the throttler fails, the fishing tool is lowered again, the fishing claws 33 are opened simultaneously after the limiting pins are automatically clamped, and then the throttler can be lifted.
In the conventional fishing operation, generally provide the pulling force by the ground winch, be subject to conditions such as steel wire intensity and stratum temperature pressure, the steel wire can't reach maximum pulling force, and the utility model discloses utilize the method that sound pulley combines, under the pulling force's of not changing ground steel wire circumstances, make the pulling force that the throttle received promote to original more than 2 times, between the influence of 11 inner spaces of urceolus, generally 16 times to the biggest.
The specific calculation formula of the increased force is as follows:
s＝nh (a)
vrope＝n*vArticle (A) (b)
FPulling device＝(1/n)*GGeneral assembly (c)
Wherein s is the moving distance of the free end of the winding rope, n is the number of the rope winding sections (the winding rope connected with the movable pulley) for bearing, and h is the rising height of the throttler; v. ofRopeThe speed at which the free end of the rope is moved (raised/lowered),Ggeneral assemblyThe weight of the object is the sum of the weight of all pulleys, and the weight of the object comprises the sum of the weight of the jar 2, the fishing barrel 3 and the throttler.
The fishing tool can finish the work of clamping and anchoring only by upward striking, the fishing tool is divided into three strokes, the first stage finishes anchoring and preliminary grasping, the second stage finishes the action of increasing the grasping force and enabling the clamping part of the underground tool to lose efficacy under the action of larger upward striking force, and the third stage of anchoring releases lifting and fishing out the underground tool. First, the lower gripping portion does not fail after the anchoring is released. Secondly, if the fishing fails, the fishing tool is only needed to be lowered, the lower limiting pin can automatically enter the lower limiting groove of the central rod 31 of the fishing barrel, so that the fishing claw 33 cannot be tightened when the fishing tool is lifted up again and taken out, and the releasing work is completed. Wherein the anchoring function is performed by the anchoring mechanism 32 on the overshot 3.
In the salvaging process of the throttler, the pulling force is provided by a ground winch and is transmitted to a downhole tool string by a steel wire. The tool string in the pit is by last under to thrust augmentation device 1 in proper order, jar 2, salvage barrel 3, when beginning to salvage, ground winch tightens up the steel wire, the steel wire drives 14 partial upward motions of movable pulley group among the thrust augmentation device 1, drive simultaneously the well core rod 31 upward motion of jar 2 and salvage barrel of lower part, when pulling force reaches jar 2's release pressure, jar 2 releases in the twinkling of an eye, make the choke ware deblocking, jar 2's release tension must be adjusted on ground, owing to set up thrust augmentation device 1, can make jar 2 obtain bigger pulling force. The greater the tension achieved by the jar 2, the greater the energy released, and the easier it is to unseal the damper. Salvage the in-process, increase to jar 2 releases after, be a jar process for when pulling force, if do not have the deblocking, transfer the instrument cluster, jar 2 return, then above-mentioned process of repetition until the throttle deblocking.
The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.
Claims (8)
1. Downhole steel for gas wellThe stress application fishing tool for the wire operation is characterized by comprising a stress application device (1), a jar (2) and a fishing barrel (3) which are sequentially connected from top to bottom; the force application device (1) comprises an outer cylinder (11) and a first connecting shaft (12) arranged in the outer cylinder (11) along the axial direction, wherein a rope winding fixing point (121) and at least one pulley axle center (122) are arranged on the first connecting shaft (12), and the rope winding fixing point (121) is positioned below the pulley axle center (122); a fixed pulley block (13) and a movable pulley block (14) are further arranged in the outer barrel (11), the fixed pulley block (13) is arranged on the pulley axle center (122), the movable pulley block (14) is arranged below the first connecting shaft (12), the fixed pulley block (13) comprises a plurality of fixed pulleys, and the movable pulley block (14) comprises a plurality of movable pulleys; the winding rope (15) sequentially winds the movable pulley and the fixed pulley from a rope winding fixing point (121) from near to far at intervals, finally goes out of the movable pulley, and the rope outlet end of the winding rope is connected with a wellhead steel wire; wherein N isFixed pulley≥1，NMovable pulleyNot less than 2 and NMovable pulley＝NFixed pulley+1，NFixed pulleyIs the number of the fixed pulleys, NMovable pulleyThe number of the movable pulleys.
2. Stress riser tool for wireline operations in the downhole of gas wells according to claim 1, characterized in that the rope-winding fixing point (121) is located at the bottom of the first connecting shaft (12), the bottom of the first connecting shaft (12) being remote from the running block (14).
3. The boosting fishing tool for the steel wire operation under the gas well is characterized by further comprising a second connecting shaft (16) for fixing the axes of a plurality of movable pulleys, wherein the axes of the plurality of movable pulleys are distributed on the second connecting shaft (16); the lower end of the second connecting shaft (16) is connected with the upper end of the jar (2) through a first screw thread.
4. The boosting fishing tool for wireline operation under gas well according to claim 3, wherein the axial centers of the plurality of fixed pulleys and movable pulleys are on the axis of the outer cylinder (11).
5. The booster fishing tool for wireline operations downhole in gas wells of claim 1, wherein the fixed sheave and the movable sheave each have a size that gradually increases away from the wireline-fixed point (121).
6. The boosting fishing tool for the steel wire operation under the gas well is characterized in that the upper port of the outer cylinder (11) is also provided with a guide wheel (17) for adjusting the direction of the rope outlet end.
7. Gas well downhole wireline intervention tool according to claim 1, wherein the wireline (15) is a flexible cable.
8. The boosting fishing tool for the downhole wireline operation of gas wells according to claim 1, characterized in that the lower end of the jar (2) is connected to the upper end of the overshot (3) by a second thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021367863.XU CN212479139U (en) | 2020-07-13 | 2020-07-13 | Boosting fishing tool for downhole steel wire operation of gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021367863.XU CN212479139U (en) | 2020-07-13 | 2020-07-13 | Boosting fishing tool for downhole steel wire operation of gas well |
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| CN212479139U true CN212479139U (en) | 2021-02-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911104A (en) * | 2020-07-13 | 2020-11-10 | 陕西汇丰悦石油科技开发有限公司 | Boosting fishing tool and method for downhole steel wire operation of gas well |
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2020
- 2020-07-13 CN CN202021367863.XU patent/CN212479139U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911104A (en) * | 2020-07-13 | 2020-11-10 | 陕西汇丰悦石油科技开发有限公司 | Boosting fishing tool and method for downhole steel wire operation of gas well |
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