CN218092984U

CN218092984U - Clamping, ash squeezing and leaking stoppage integrated tool

Info

Publication number: CN218092984U
Application number: CN202222494789.3U
Authority: CN
Inventors: 刘智泉; 康玉阳; 杜东哲
Original assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-12-20
Anticipated expiration: 2032-09-20

Abstract

The utility model discloses a clamping, ash-squeezing and leaking stoppage integrated tool, wherein a guiding head is screwed on the periphery of the lower end of a bridge plug mandrel, the upper end of the bridge plug mandrel is closed and provided with a convex ring, a seating ring is arranged below a step of the convex ring of the mandrel, and a seating mechanism is arranged between the seating ring and the guiding head; a push cylinder is sleeved on the periphery of the mandrel convex ring, the lower end of the push cylinder is abutted against the seating ring, and the upper end of the push cylinder is screwed with the periphery of the lower hydraulic cylinder piston; a tension ring is screwed in the convex ring of the bridge plug mandrel, the inner wall of the upper end of the tension ring is screwed with a lower mandrel, the inner periphery of the upper end of the lower mandrel is screwed with an upper mandrel, the outer periphery of the upper end of the lower mandrel is screwed with a mandrel piston, a lower hydraulic cavity is arranged between the bottom of the lower mandrel and the top of a lower hydraulic cylinder piston, and a lower mandrel pressure transfer hole is communicated with the lower hydraulic cavity; the lower end inner cavity of the lower mandrel is provided with a sealing plug and is embedded in the groove of the tension ring. The tool directly uses the string to squeeze ash to plug the broken leakage after the bridge plug is broken, and after the plugging is completed, the grinding and milling string is put in to finish the ash drilling and bridge plug drilling construction once, so that the operation period is greatly saved.

Description

Clamping, ash squeezing and leaking stoppage integrated tool

Technical Field

The utility model relates to an oil field cover decreases the leaking stoppage instrument of well, especially relates to a crowded grey leaking stoppage integration instrument of card sealing, belongs to cover and decreases well leaking stoppage technical field.

Background

For an oil field casing damage well, plugging is carried out in a common mode of injecting ash, beating a partition plate, waiting for solidification and then squeezing the ash. Due to formation pressure, wellbores are subject to spills or losses, and sometimes it is difficult to successfully place a plug in a given interval. The existing plugging process of the metal bridge plug comprises the following steps: determining a leakage breaking position through leakage finding of a packer, and calculating the water absorption capacity of a leakage breaking section; drilling a metal bridge plug below the leakage section, and pulling out a bridge plug drilling tubular column after setting; thirdly, filling sand above the metal bridge plug by arranging the sand filling pipe column so as to protect the metal bridge plug; fourthly, according to the water absorption amount, sufficient cement paste is injected above the sand layer; carrying out wellhead pressurization, and extruding cement slurry into a leaking layer to realize plugging; sixthly, drilling ash to a sand layer above the bridge plug, then carrying out pressure test, and determining that the pressure test is qualified; fishing the bridge plug pipe column and fishing out the metal bridge plug; and dredging the well by the lower dredging pipe column to the position below the production layer.

When the metal bridge plug is salvaged, the sleeve is easy to deform under the condition of high ash squeezing pressure of a leakage breaking section, so that the bridge plug is salvaged unsuccessfully; or the bridge plug can not be unlocked or residual ash is stuck on the bridge plug surface, so that the fishing is unsuccessful.

The outer side of the existing metal bridge plug setting tool is provided with 6 10mm pressure relief holes, the diameter of a central hole channel is only 20mm, and ash replacement and ash squeezing construction cannot be carried out; after the bridge plug is seated, only the pipe column is arranged to inject and squeeze ash, which occupies a long well period and has high operation cost. In addition, the outer diameter of the existing metal bridge plug setting tool is 114mm, the clearance between the existing metal bridge plug setting tool and the inner wall of the casing is too small, and if the existing metal bridge plug setting tool is lifted up, a large pumping effect is generated, and the stability of the grouted cement is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a crowded grey leaking stoppage integration instrument of card packing, beat the bridging plug after directly break through with the crowded grey shutoff of this string of a trip, accomplish the shutoff back, go into down to mill the tubular column once accomplish and bore grey, bore the bridging plug construction, can practice thrift operation cycle greatly.

In order to solve the technical problems, the utility model discloses a clamping ash-squeezing leaking stoppage integrated tool, including the bridge plug dabber, the lower extreme periphery of bridge plug dabber has connect the seeker soon, and the upper end of bridge plug dabber is sealed and is equipped with the bridge plug dabber protruding circle that upwards expands the diameter and extends, and the step below of bridge plug dabber protruding circle is equipped with the seat ring, be equipped with the seat mechanism between seat ring and the seeker; a pushing cylinder is sleeved on the periphery of the convex ring of the bridge plug mandrel, the lower end of the pushing cylinder abuts against the upper end face of the setting ring, and the upper end of the pushing cylinder is screwed with the periphery of the piston of the lower hydraulic cylinder; a tension ring is screwed in the internal thread of the convex ring of the bridge plug mandrel, a lower mandrel is screwed on the inner wall of the upper end of the tension ring, the outer wall of the upper part of the lower mandrel is sealed with the inner wall of the lower hydraulic cylinder piston, an upper mandrel is screwed on the inner circumference of the upper end of the lower mandrel, a mandrel piston is screwed on the outer circumference of the upper end of the lower mandrel, the outer wall of the mandrel piston is sealed with the inner wall of the cylinder body of the lower hydraulic cylinder, and the cylinder body of the lower hydraulic cylinder is connected with the lower hydraulic cylinder piston into a whole; a lower hydraulic cavity is arranged between the bottom of the mandrel piston and the top of the lower hydraulic cylinder piston, and a lower mandrel pressure transmission hole communicated with the lower hydraulic cavity is formed in the circumference of the upper part of the lower mandrel; the lower mandrel is characterized in that a sealing plug is arranged in the inner cavity of the lower end of the lower mandrel, a plug convex ring is arranged on the periphery of the middle of the sealing plug, the plug convex ring is located below the lower mandrel and embedded in the groove of the tension ring, and the large-diameter section of the lower end of the sealing plug is attached to the inner cavity of the tension ring.

As the utility model discloses an improvement, the last end of lower hydraulic cylinder connects has last hydraulic cylinder piston, the inner wall of going up the hydraulic cylinder piston with the outer wall of top spindle is realized sealedly, the upper end of top spindle connects in the lower extreme internal thread of top connection soon, the upper end periphery of going up the hydraulic cylinder piston is even as an organic whole with the barrel of last hydraulic cylinder, the upper portion periphery of going up the hydraulic cylinder hangs through the shear pin the middle part periphery of top connection, the bottom of top connection with be equipped with hydraulic pressure chamber between the top of last hydraulic cylinder piston, the upper portion circumference of top spindle is equipped with the top spindle and passes the pressure hole and be linked together with hydraulic pressure chamber.

As a further improvement of the utility model, the setting mechanism comprises a long rubber cylinder sleeved on the periphery of the bridge plug mandrel, two ends of the long rubber cylinder are embedded in a short rubber cylinder, an upper cone is arranged above the upper short rubber cylinder, the small end of the upper cone faces upwards and is matched with the lower inner conical surface of an upper slip, and the top of the upper slip is abutted against the lower part of the setting ring; and a lower cone is arranged below the lower short rubber cylinder, the small end of the lower cone faces downwards and is matched with the inner conical surface of the upper part of the lower slip, and the bottom of the lower slip is abutted against the top of the guide head.

As a further improvement of the utility model, the center hole inner wall of top connection with the inner wall parallel and level of top core axle and lower core axle, and the center hole aperture is 42mm, the external diameter of top connection, last hydraulic cylinder and lower hydraulic cylinder is 108mm.

As a further improvement of the utility model, the lower part circumference of the lower hydraulic cylinder is provided with a lower hydraulic cylinder through hole and the upper cavity of the mandrel piston is communicated with each other.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the construction method that after the metal bridge plug is punched, the bridge plug punching tubular column needs to be taken out, then the cement injection tubular column is put in, sand is filled firstly to protect the metal bridge plug, and then cement is injected and squeezed is changed; the setting tool is skillfully matched with the bridge plug for use, the purposes of setting, injecting ash and squeezing ash to stop leakage can be realized by the next time of pipe column, compared with the traditional process, the single operation saves the cost by about 4 ten thousand yuan, the well occupation period is greatly reduced, and the risk that the bridge plug cannot be fished out is avoided.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a front view of the integrated tool for blocking, ash squeezing and leaking stoppage of the utility model.

In the figure: 1. an upper joint; 1a, an upper joint sealing ring; 2. feeding a liquid cylinder; 2a, an upper cylinder piston; 3. shearing the nails; 4. an upper mandrel; 4a, mounting a mandrel pressure transmission hole; 5. a mandrel piston; 6. discharging the liquid cylinder; 6a, a lower cylinder piston; 6b, arranging a through hole of the hydraulic cylinder; 7. a lower mandrel; 7a, a lower mandrel pressure transmission hole; 8. a push cylinder; 9. a tension ring; 10. a bridge plug mandrel; 10a, a bridge plug mandrel convex ring; 11. setting a sealing ring; 12. an upper slip; 13. an upper cone; 14. a short rubber cylinder; 15. a long rubber cylinder; 16. a lower cone; 17. a slip is put down; 18. a seeker; 19. and (6) sealing the plug.

Detailed Description

In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplified description, and do not mean that the device must have a specific orientation.

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, the blocking, ash squeezing and leaking stoppage integrated tool of the utility model comprises a bridge plug mandrel 10, a guiding head 18 is screwed on the periphery of the lower end of the bridge plug mandrel 10, and a pen point is arranged at the lower end of the guiding head 18, so that the tool can be guided to enter the well smoothly; a blind plate is arranged in an inner cavity at the upper end of the bridge plug mandrel 10 to seal a central hole of the bridge plug mandrel 10, and the blind plate is used as a bottom hole for injecting ash after setting; the upper end of the bridge plug mandrel 10 is also provided with a bridge plug mandrel convex ring 10a which expands upwards and extends, a setting ring 11 is arranged below the step of the bridge plug mandrel convex ring 10a, and a setting mechanism is arranged between the setting ring 11 and the guide head 18.

The setting mechanism comprises a long rubber cylinder 15 sleeved on the periphery of the bridge plug mandrel 10, two ends of the long rubber cylinder 15 are embedded in a short rubber cylinder 14, an upper cone 13 is arranged above the upper short rubber cylinder 14, the small end of the upper cone 13 faces upwards and is matched with the inner conical surface of the lower part of the upper slip 12, and the top of the upper slip 12 abuts against the lower part of the setting ring 11; a lower cone 16 is arranged below the short rubber cylinder below, the small end of the lower cone 16 faces downwards and is matched with the upper inner conical surface of a lower slip 17, and the bottom of the lower slip 17 abuts against the top of a guide head 18.

The periphery of the convex ring 10a of the bridge plug mandrel is sleeved with a push cylinder 8, the lower end of the push cylinder 8 is abutted against the upper end face of the seat seal ring 11, and the upper end of the push cylinder 8 is screwed with the periphery of the lower cylinder piston 6 a; the circumference of the upper part of the push cylinder 8 is provided with a push cylinder through hole which is communicated with the lower space of the lower hydraulic cylinder piston 6a, so that the pressure build-up generated in the downward movement process of the lower hydraulic cylinder piston 6a is avoided.

A tension ring 9 is screwed in the internal thread of the bridge plug mandrel convex ring 10a, a lower mandrel 7 is screwed on the inner wall of the upper end of the tension ring 9, a lower hydraulic cylinder sealing ring is embedded in the inner wall of a lower hydraulic cylinder piston 6a to realize sealing with the outer wall of the upper part of the lower mandrel 7, an upper mandrel 4 is screwed on the inner circumference of the upper end of the lower mandrel 7, a mandrel piston 5 is screwed on the outer circumference of the upper end of the lower mandrel 7, an outer piston sealing ring is embedded in the outer wall of the mandrel piston 5 to realize sealing with the inner wall of the cylinder body of the lower hydraulic cylinder 6, an inner piston sealing ring is embedded in the inner wall of the upper part of the mandrel piston 5 to realize sealing with the outer wall of the upper mandrel 4, and the cylinder body of the lower hydraulic cylinder 6 is connected with the lower hydraulic cylinder piston 6a into a whole; a lower hydraulic cavity is arranged between the bottom of the mandrel piston 5 and the top of the lower hydraulic cylinder piston 6a, and a lower mandrel pressure transmission hole 7a communicated with the lower hydraulic cavity is formed in the circumference of the upper portion of the lower mandrel 7.

The lower end inner cavity of the lower mandrel 7 is provided with a sealing plug 19, and a plug sealing ring is embedded on the periphery of the upper part of the sealing plug 19 to realize sealing with the inner wall of the lower mandrel 7. The periphery of the middle part of the sealing plug 19 is provided with a plug convex ring, the plug convex ring is positioned below the lower mandrel 7 and embedded in the groove of the tension ring 9, so that the sealing plug 19 obtains axial positioning, and the large-diameter section of the lower end of the sealing plug 19 is attached to the inner cavity of the tension ring 9. The groove of the tension ring 9 is the weakest part, the pipe column is suppressed to a certain pressure, the convex ring of the plug and the groove of the tension ring 9 are broken, the sealing plug 19 falls down, so that the central holes of the upper joint 1, the upper mandrel 4 and the lower mandrel 7 are communicated, the cement pipe column does not need to be injected again, the upper joint 1, the upper mandrel 4 and the lower mandrel 7 after the tool is directly used for injecting cement and extruding the cement for plugging, and the hole diameters of the upper joint 1, the upper mandrel 4 and the lower mandrel central hole reach 42mm, so that the requirement of injecting cement slurry into a leakage breaking section can be completely met, and one-time pipe column is omitted.

The sealing plug 19 reliably seals the central pore passage above the lower mandrel 7 of the tool, so that the shear pin 3 can be conveniently sheared by pressing the wellhead.

The well reserving parts such as the bridge plug mandrel 10 and the setting mechanism are made of quick drilling composite materials, so that subsequent drilling and removal are facilitated.

The upper end of the lower hydraulic cylinder 6 is screwed with an upper hydraulic cylinder piston 2a, the inner wall of the upper hydraulic cylinder piston 2a is embedded with an upper hydraulic cylinder sealing ring to realize sealing with the outer wall of the upper mandrel 4, the upper end of the upper mandrel 4 is screwed into the lower end internal thread of the upper joint 1, the periphery of the upper end of the upper hydraulic cylinder piston 2a is connected with the cylinder body of the upper hydraulic cylinder 2 into a whole, and the lower end sealing section of the upper joint 1 is embedded with an upper joint sealing ring 1a to realize sealing with the inner wall of the upper hydraulic cylinder 2.

The periphery of the upper part of the upper hydraulic cylinder 2 is hung on the periphery of the middle part of the upper joint 1 through shear pins 3, an upper hydraulic cavity is arranged between the bottom of the upper joint 1 and the top of a piston 2a of the upper hydraulic cylinder, and the upper circumference of the upper core shaft 4 is provided with an upper core shaft pressure transmission hole 4a communicated with the upper hydraulic cavity.

The outer diameters of the upper joint 1, the upper hydraulic cylinder 2 and the lower hydraulic cylinder 6 are 108mm, so that the pumping effect during upward pipe drawing is reduced, and the blocking effect is prevented from being influenced. The inner wall of the central hole of the upper joint 1 is flush with the inner walls of the upper mandrel 4 and the lower mandrel 7 so as to ensure that the cement injection slurry has enough drift diameter and ensure the efficiency and the safety of cement injection.

The lower part circumference of lower hydraulic cylinder 6 is equipped with lower hydraulic cylinder through-hole 6b and communicates with each other with the top cavity of dabber piston 5, goes up hydraulic chamber and lower hydraulic chamber expansion in-process, avoids the top cavity of dabber piston 5 to produce the suppress pressure.

The working steps of the tool are as follows: the method comprises the steps of finding leakage of a lower packer, finding a leakage breaking position and determining that a leakage breaking section is located above an oil layer.

And the blocking, ash squeezing and leaking stoppage integrated tool is conveyed to a downhole design position through the pipe column, namely, the blocking, ash squeezing and leaking stoppage integrated tool is positioned below the broken leakage section and above an oil layer.

Thirdly, the hydraulic pressure enters an upper hydraulic cavity through an upper mandrel pressure transfer hole 4a and enters a lower hydraulic cavity through a lower mandrel pressure transfer hole 7a, the upper joint 1, the upper mandrel 4, the lower mandrel 7, the tension ring 9 and the bridge plug mandrel 10 are suspended by the tubular column and are kept still, the upper hydraulic cavity applies downward thrust to the upper hydraulic cylinder piston 2a, the lower hydraulic cavity applies downward thrust to the lower hydraulic cylinder piston 6a, the shear pin 3 is firstly sheared, then the upper hydraulic cylinder 2 and the lower hydraulic cylinder 6 jointly push the push cylinder 8 to slide downwards, the lower end of the push cylinder 8 pushes the upper slip 12 to move downwards along the conical surface of the upper cone 13 through the setting ring 11, and the lower slip 17 relatively moves upwards along the conical surface of the lower cone 16, meanwhile, the large ends of the upper cone 13 and the lower cone 16 extrude the short rubber cylinders and the long rubber cylinders 15 from two sides, and the middle section of the long rubber cylinders 15 bulge out to realize setting with the inner wall of the casing; the clamping teeth on the outer wall of the upper slip 12 and the lower slip 17 are anchored on the inner wall of the casing. Then the well head pressure is increased, the tension ring 9 is broken, the bridge plug mandrel 10 and the setting mechanism are kept still, the upper joint 1, the upper mandrel 4, the lower mandrel 7, the tension ring 9, the upper hydraulic cylinder 2, the lower hydraulic cylinder 6 and the push cylinder 8 are lifted for a certain distance along with the pipe column, and the sealing plug 19 falls down.

Injecting water into the well through central ducts of the upper joint 1, the upper mandrel 4 and the lower mandrel 7 to obtain the water absorption capacity of the leakage breaking section, then replacing with a certain amount of mortar, lifting the pipe column to a safe height, pressurizing the well mouth to extrude the mortar into the leakage breaking section, and plugging.

After the cement slurry is solidified, the cement slurry is pulled out of the wellhead, and the upper joint 1, the upper mandrel 4, the lower mandrel 7, the tension ring 9, the upper hydraulic cylinder 2, the lower hydraulic cylinder 6 and the push cylinder 8 are pulled out of the wellhead along with the cement slurry.

Sixthly, drilling flat-bottom mill shoes through mortar to the top of the bridge plug mandrel 10, then testing the pressure of a shaft to 20MPa, stabilizing the pressure for 30min, and if the pressure drop is less than 0.5MPa, judging that the plugging is qualified.

The string is lengthened and drilled directly through the bridge plug mandrel 10 and the wellbore is run below the producing formation.

The foregoing is only a preferred and exemplary embodiment of the present invention, and the basic principles and main features of the present invention and the advantages of the present invention have been shown and described, without thereby limiting the scope of the present invention, which should be understood by those skilled in the art, and the present invention is not limited by the foregoing exemplary embodiments. In addition to the above embodiments, other embodiments of the present invention are also possible without departing from the spirit and scope of the present invention. The utility model discloses still can have various changes and improvements, all adopt the technical scheme that equivalent replacement or equivalent transform formed, all fall in the protection scope that the utility model discloses required. The scope of the invention is defined by the appended claims and equivalents thereof. The technical features of the present invention that have not been described can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides a crowded grey leaking stoppage integration instrument of card seal, includes bridging plug dabber, its characterized in that: the lower end periphery of the bridge plug mandrel is screwed with a guide head, the upper end of the bridge plug mandrel is closed and is provided with a bridge plug mandrel convex ring expanding upwards, a seating ring is arranged below a step of the bridge plug mandrel convex ring, and a seating mechanism is arranged between the seating ring and the guide head; a pushing cylinder is sleeved on the periphery of the convex ring of the bridge plug mandrel, the lower end of the pushing cylinder abuts against the upper end face of the setting ring, and the upper end of the pushing cylinder is screwed with the periphery of the piston of the lower hydraulic cylinder; a tension ring is screwed in the internal thread of the convex ring of the bridge plug mandrel, a lower mandrel is screwed on the inner wall of the upper end of the tension ring, the outer wall of the upper part of the lower mandrel is sealed with the inner wall of the lower hydraulic cylinder piston, an upper mandrel is screwed on the inner circumference of the upper end of the lower mandrel, a mandrel piston is screwed on the outer circumference of the upper end of the lower mandrel, the outer wall of the mandrel piston is sealed with the inner wall of the cylinder body of the lower hydraulic cylinder, and the cylinder body of the lower hydraulic cylinder is connected with the lower hydraulic cylinder piston into a whole; a lower hydraulic cavity is arranged between the bottom of the mandrel piston and the top of the lower hydraulic cylinder piston, and a lower mandrel pressure transmission hole communicated with the lower hydraulic cavity is formed in the circumference of the upper part of the lower mandrel; the lower mandrel is characterized in that a sealing plug is arranged in an inner cavity of the lower end of the lower mandrel, a plug convex ring is arranged on the periphery of the middle of the sealing plug, the plug convex ring is located below the lower mandrel and embedded in a groove of the tension ring, and a large-diameter section of the lower end of the sealing plug is attached to an inner cavity of the tension ring.

2. The integrated tool for blocking, squeezing and plugging according to claim 1, wherein: the upper end of lower hydraulic cylinder has connect the upper hydraulic cylinder piston soon, the inner wall of upper hydraulic cylinder piston with the outer wall of upper core axle realizes sealedly, the upper end of upper core axle connects in the lower extreme internal thread of top connection soon, the upper end periphery of upper hydraulic cylinder piston links as an organic wholely with the barrel of upper hydraulic cylinder, the upper portion periphery of upper hydraulic cylinder hangs through the shear pin the middle part periphery of top connection, the bottom of top connection with be equipped with hydraulic pressure chamber between the top of upper hydraulic cylinder piston, the upper portion circumference of upper core axle is equipped with the upper core axle and passes the pressure hole and be linked together with hydraulic pressure chamber.

3. The integrated tool for blocking, squeezing and plugging according to claim 1, wherein: the setting mechanism comprises a long rubber cylinder sleeved on the periphery of the bridge plug mandrel, two ends of the long rubber cylinder are embedded in the short rubber cylinder, an upper cone is arranged above the upper short rubber cylinder, the small end of the upper cone faces upwards and is matched with the inner conical surface of the lower part of the upper slip, and the top of the upper slip is abutted against the lower part of the setting ring; and a lower cone is arranged below the lower short rubber cylinder, the small end of the lower cone faces downwards and is matched with the inner conical surface of the upper part of the lower slip, and the bottom of the lower slip is propped against the top of the guide head.

4. The integrated tool for blocking, squeezing and plugging according to claim 2, characterized in that: the inner wall of the central hole of the upper joint is flush with the inner walls of the upper core shaft and the lower core shaft, the aperture of the central hole is 42mm, and the outer diameters of the upper joint, the upper hydraulic cylinder and the lower hydraulic cylinder are 108mm.

5. The integrated tool for blocking, squeezing and plugging ash according to claim 1, wherein: and the lower part circumference of the lower hydraulic cylinder is provided with a lower hydraulic cylinder through hole which is communicated with the upper cavity of the mandrel piston.