CN218177199U

CN218177199U - Oil extraction device of sleeve pipe leakage-breaking well

Info

Publication number: CN218177199U
Application number: CN202222532585.4U
Authority: CN
Inventors: 张向阳; 李志刚; 康玉阳; 陈聪颖; 费玉亭; 雷佳
Original assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-30
Anticipated expiration: 2032-09-23

Abstract

The utility model discloses an oil extraction device of a bushing leakage-breaking well, a drillable bridge plug is arranged below an oil layer, a drillable intubation tube oil extraction bridge plug is arranged above the oil layer, an intubation tube is arranged in a central tube of the oil extraction device, an overflow purifier and an oil pump are arranged above the intubation tube, and an oil pipe above the oil pump is supported on the inner wall of a bushing through a hydraulic anchor; a push ring is arranged below the step of the convex ring at the upper end of the central tube, and a setting mechanism is arranged between the push ring and the guide shoe; a setting push cylinder is sleeved on the periphery of the central tube convex ring, the lower end of the setting push cylinder is abutted against the push ring, and the upper end of the setting push cylinder is screwed with the lower hydraulic cylinder; the center tube convex ring is connected with a shearing ring in a rotating mode, the inner wall of the upper end of the shearing ring is connected with a conversion joint in a rotating mode, the upper end of the conversion joint is connected with a lower mandrel in a rotating mode, the upper end of the lower mandrel is connected with an upper mandrel in a rotating mode, a lower hydraulic cavity is arranged between the bottom of a piston of the upper mandrel and the top of a piston of a lower hydraulic cylinder, and a pressure transmission hole in the circumference of the upper portion of the lower mandrel is communicated with the lower hydraulic cavity. The device can be used for lowering the tubular column less, so that the operation period and the operation cost are saved.

Description

Oil extraction device of sleeve pipe leakage-breaking well

Technical Field

The utility model relates to an oil production pipe of oil-water well especially relates to a casing pipe breaks oil production device of leaky well, belongs to oil production instrument technical field.

Background

With the continuous deep development of oil fields, the extension of the exploitation life of oil wells, and the corrosion and scaling problems accompanying the release of extracting solution and high water content, casing damage wells and casing leakage wells are continuously increased. The long leakage section, multi-section leakage and other complex shaft conditions and water blocking, downward returning and other development measures seriously restrict the subsequent development of old oil fields.

The conventional water-blocking oil extraction process technology has self limitation in long-breaking-leakage sections, multi-section breaking and multi-layer water-blocking and downward-returning development, and particularly the conventional water-blocking oil extraction process of a small well cannot be implemented at all. For example, the operation cost for suspending the small casing is high, the construction period is long, and the subsequent construction difficulty is large; the effective period of the clamping seal of the pump belt packer is short, and the risk of clamping the pipe column is high; the construction period of the ash squeezing plugging operation is long, the operation cost is high, the risk is high, and the plugging success rate is low.

With the increasing requirements of casing damage wells, leakage-breaking wells and later development of oil fields, the intubation tube oil production technology is widely applied due to low cost, the total number of wells and the number of open wells of the intubation tube oil production wells are increased continuously, and by taking Jiangsu oil fields as examples, about 20 intubation tube oil production wells are newly added in the year.

The conventional well pipe-inserting oil extraction process mainly comprises a QSC-114 ash-extruding bridge plug, an inserting pipe, a bridge plug setting tool, a pump string and the like. The conditions that the insertion pipe cannot be inserted in place, sand and dirt is blocked in a bridge plug and the sealing stability of the insertion pipe is poor frequently occur in the insertion pipe oil production well during operation. When an oil well needs to be repaired, the bridge plug can be fished out only by using a special fishing tool, the bridge plug is often failed to be fished or even overhauled due to long time for leaving the well or the reason for sleeve deformation of a shaft, and the removable pipe-inserting oil extraction bridge plug is not easy to mill, so that the subsequent measure progress of the oil well is seriously 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 casing pipe broken leaking well's oil recovery device, when the oil well need mend the change layer, need not special fishing tool down, only need directly to grind the bridging plug down and bore and grind, realize practicing thrift operation cycle and operating cost purpose.

In order to solve the technical problem, the utility model discloses an oil recovery device of sleeve pipe broken leakage well, including the sleeve pipe, the broken leakage section of sleeve pipe is located the top of oil reservoir, and the below of oil reservoir is equipped with the drillable bridge plug of shutoff sleeve pipe inner chamber, and the top of oil reservoir is equipped with drillable intubate oil recovery bridge plug, the intubate has been inserted in the center tube of drillable intubate oil recovery bridge plug, the top of intubate is equipped with the overcurrent clarifier, the top of overcurrent clarifier is equipped with the oil-well pump, the top of oil-well pump links to each other with oil pipe and supports at the sleeve pipe inner wall through the hydraulic anchor; the periphery of the lower end of a central pipe of the drillable intubation oil extraction bridge plug is connected with a guide shoe in a screwing mode, the upper end of the central pipe is provided with an expanded central pipe convex ring, a push ring is arranged below a step of the central pipe convex ring, and a setting mechanism is arranged between the push ring and the guide shoe; a setting push cylinder is sleeved on the periphery of the central tube convex ring, the lower end of the setting push cylinder abuts against the upper end face of the push ring, and the upper end of the setting push cylinder is in screwed connection with the periphery of the lower hydraulic cylinder; the internal thread of the central pipe convex ring is connected with a shearing ring in a rotating mode, the inner wall of the upper end of the shearing ring is connected with an adapter in a rotating mode, the upper end of the adapter is connected with a lower mandrel in a rotating mode, the outer wall of the upper portion of the lower mandrel is sealed with the inner wall of a piston of a lower hydraulic cylinder, the periphery of the upper end of the lower mandrel is connected with an upper mandrel in a rotating mode, the outer wall of a piston of the upper mandrel is sealed with the lower hydraulic cylinder, a lower hydraulic cavity is arranged between the bottom of the piston of the upper mandrel and the top of the piston of the lower hydraulic cylinder, and the upper circumference of the lower mandrel is provided with a lower mandrel pressure transmission hole communicated with the lower hydraulic cavity.

As the utility model discloses an improvement, the last end of lower hydraulic cylinder connects has last hydraulic cylinder soon, the lower extreme piston inner wall of going up the hydraulic cylinder with the outer wall of top end axle realizes sealedly, the upper end of top end connects in the lower extreme internal thread of top end soon, the upper portion periphery of going up the hydraulic cylinder hangs through the pin the middle part periphery of top end, the bottom of top end with be equipped with hydraulic pressure chamber between the piston top of going up the hydraulic cylinder, the upper portion circumference of top end axle is equipped with the top end axle and passes the pressure hole and be linked together with last 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 central tube, 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 lower inner conical surface of the upper slip, and the top of the upper slip is abutted against the lower part of the push 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 shoe.

As a further improvement of the utility model, the lower mandrel inner wall below the lower mandrel pressure transmission hole is provided with a conical horn mouth for the steel ball to seat.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the quick blocking and sealing device can be used for quick blocking and sealing and oil extraction of large-section leakage or multi-point water outlet of a blocking and sealing sleeve of an oil field, setting and releasing are very reliable, convenient and quick, when an oil well needs to be repaired and changed into a layer, a special fishing tool is not needed, only a direct lower grinding shoe is needed to grind off a bridge plug drill, at least one less pipe column is needed, the operation period and the operation cost are saved, and the quick blocking and sealing device is particularly suitable for an oil well which is changed into a sleeve and is difficult to salvage.

Drawings

The invention is described in further detail below with reference to the attached drawings and the detailed description, wherein the drawings are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a schematic view of an oil extraction device of a casing leakage well according to the present invention;

fig. 2 is a cross-sectional view of the drillable pipe-inserting oil extraction bridge plug of the utility model.

In the figure: A. a hydraulic anchor; B. an oil-well pump; C. an overflow purifier; D. an oil extraction bridge plug with a drillable insertion pipe; E. drilling a bridge plug; 1. an upper joint; 1a, an upper joint sealing ring; 2. feeding a liquid cylinder; 2a, an upper cylinder piston; 2b, arranging a pressure relief hole in the hydraulic cylinder; 3. a pin; 4. an upper mandrel; 4a, mounting a mandrel pressure transmission hole; 4b, an upper mandrel piston; 5. a hydraulic cylinder is arranged; 5a, a lower cylinder piston; 5b, arranging a through hole of the hydraulic cylinder; 6. a lower mandrel; 6a, a lower mandrel pressure transmission hole; 7. setting a push cylinder; 7a, a long groove of the push cylinder; 8. a crossover sub; 8a, converting joint radial holes; 9. a shear ring; 10. a central tube; 10a, a central pipe convex ring; 11. a push ring; 12. the slips are put on; 13. an upper cone; 14. an upper short rubber cylinder; 15. a long rubber cylinder; 16. a lower short rubber cylinder; 17. a lower cone; 18. a slip is put down; 19. guiding a shoe; 20. and (5) steel balls.

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 the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not mean that the device must have a specific orientation.

As shown in fig. 1 and fig. 2, the utility model discloses an oil recovery device of broken leaky well of sleeve pipe includes the sleeve pipe, sheathed tube broken leakage section is located the top of oil reservoir, the below of oil reservoir is equipped with the drillable bridge plug E of shutoff cover pipe inner chamber, the top of oil reservoir is equipped with drillable intubate oil recovery bridge plug D, the intubate has been inserted in drillable intubate oil recovery bridge plug D's the center tube 10, the top of intubate is equipped with overflows clarifier C (filter screen), it is equipped with oil-well pump B to overflow clarifier C's top, oil-well pump B's top links to each other with oil pipe and supports at the intraductal wall of sleeve through hydraulic anchor A. KYLM1 type hydraulic anchor is selected for the hydraulic anchor A, and QSA drillable bridge plug is selected for the drillable bridge plug E.

The periphery of the lower end of a central tube 10 of the oil extraction bridge plug D with the drillable intubation is screwed with a guide shoe 19, the upper end of the central tube 10 is provided with a central tube convex ring 10a with the diameter expanded, a push ring 11 is arranged below a step of the central tube convex ring 10a, and a setting mechanism is arranged between the push ring 11 and the guide shoe 19.

The setting mechanism comprises a long rubber cylinder 15 sleeved on the periphery of the central tube 10, two ends of the long rubber cylinder 15 are embedded in the short rubber cylinder, an upper cone 13 is arranged above an 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 is abutted against the lower part of the push ring 11; a lower cone 17 is arranged below the lower short rubber cylinder 16, the small end of the lower cone 17 faces downwards and is matched with the upper inner conical surface of a lower slip 18, and the bottom of the lower slip 18 is abutted against the top of a guide shoe 19.

The periphery of the central pipe convex ring 10a is sleeved with a setting push cylinder 7, the lower end of the setting push cylinder 7 is abutted against the upper end face of the push ring 11, and the upper end of the setting push cylinder 7 is screwed with the periphery of the lower hydraulic cylinder 5; the internal thread of the central pipe convex ring 10a is connected with a shearing ring 9 in a rotating mode, the inner wall of the upper end of the shearing ring 9 is connected with an adapter 8 in a rotating mode, the lower end of the adapter 8 is sealed, the upper end of the adapter 8 is connected with a lower mandrel 6 in a rotating mode, the outer wall of the upper portion of the lower mandrel 6 is sealed with the inner wall of a piston of a lower hydraulic cylinder 5, the periphery of the upper end of the lower mandrel 6 is connected with an upper mandrel 4 in a rotating mode, the lower portion of the upper mandrel 4 is provided with an upper mandrel piston 4b, the outer wall of the upper mandrel piston 4b is sealed with the lower hydraulic cylinder 5, a lower hydraulic cavity is arranged between the bottom of the piston of the upper mandrel 4 and the top of the piston of the lower hydraulic cylinder 5, and a lower mandrel pressure transmission hole 6a is formed in the circumference of the upper portion of the lower mandrel 6 and communicated with the lower hydraulic cavity. The centre bore of lower dabber 6 is less, and the aperture of center tube 10 is great, realizes the conversion of big aperture and small aperture through crossover sub 8, so can make center tube 10 have great aperture, the intubate of being convenient for inserts and has great actual latus rectum.

The circumferential wall of the lower hydraulic cylinder 5 is connected with a lower hydraulic cylinder piston 5a at the lower part into a whole and slides synchronously. The central tube 10 and the setting mechanism are both made of composite materials, and a shoe grinding drill can be directly ground down without a lower fishing tool.

The upper end of the lower hydraulic cylinder 5 is screwed with an upper hydraulic cylinder 2, the lower end of the upper hydraulic cylinder 2 is provided with an upper hydraulic cylinder piston 2a, the inner wall of the upper hydraulic cylinder piston 2a is sealed with the outer wall of an 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 upper periphery of the upper hydraulic cylinder 2 is suspended on the periphery of the middle part of the upper joint 1 through a pin 3, an upper hydraulic cavity is arranged between the bottom of the upper joint 1 and the top of the upper hydraulic cylinder piston 2a, and the upper periphery of the upper mandrel 4 is provided with an upper mandrel pressure transmitting hole 4a communicated with the upper hydraulic cavity. The circumferential wall of the upper hydraulic cylinder 2 is connected with the upper hydraulic cylinder piston 2a at the lower part into a whole and slides synchronously. The upper mandrel 4 is connected with an upper mandrel piston 4b at the lower part of the upper mandrel 4 into a whole, and the outer wall of the upper mandrel piston 4b and the lower hydraulic cylinder 5 slide relatively.

The inner wall of the lower mandrel 6 below the lower mandrel pressure transmission hole 6a is provided with a conical bell mouth, when setting is needed, the steel ball 20 is thrown into the well mouth, the steel ball 20 falls onto the conical bell mouth of the lower mandrel 6 to be set, and pressure is built.

The middle circumference of the adapter 8 is provided with an adapter radial hole 8a communicated with the central hole of the adapter 8. A plurality of long push cylinder grooves 7a are uniformly distributed on the circumference of the middle part of the setting push cylinder 7, and are communicated with a cavity between the bottom of the lower hydraulic cylinder 5 and the top of the central pipe convex ring 10a. When the pipe column is lowered, the long groove 7a of the push cylinder and the radial hole 8a of the adapter are communicated with the inside and the outside of the pipe column, so that the pressure balance between the inside and the outside of the pipe column is ensured, the buoyancy is avoided, and the well mouth is not required to be filled with water.

The periphery of the lower 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 inner wall of the lower piston of the upper hydraulic cylinder 2 is embedded with an upper hydraulic cylinder sealing ring to realize sealing with the outer wall of the upper mandrel 4, and the upper end and the lower end of the upper hydraulic cavity are sealed.

The outer wall of the piston at the lower part of the upper mandrel 4 is embedded with an upper mandrel sealing ring to realize sealing with the inner wall of the lower hydraulic cylinder 5, the inner wall of the piston of the lower hydraulic cylinder 5 is embedded with a lower hydraulic cylinder sealing ring to realize sealing with the outer wall at the upper part of the lower mandrel 6, and thus, the upper end and the lower end of the lower hydraulic cavity are sealed.

An upper joint reducing section is arranged between the upper part of the lower sealing section of the upper joint 1 and the circumference of the pin joint, and an upper cylinder pressure relief hole 2b is arranged on the circumference of the upper cylinder 2 and communicated with the upper part of the upper joint reducing section. The upper circumference of the lower hydraulic cylinder 5 is provided with a lower hydraulic cylinder through hole 5b which is communicated with the upper cavity of the upper mandrel piston 4b.

In the process of lowering the tubular column into the well, the upper cavity of the upper mandrel piston 4b is communicated with the annular space through the lower hydraulic cylinder through hole 5b, so that the pressure building is prevented. In the setting process, the upper mandrel 4 and the lower mandrel 6 are kept still, the upper hydraulic cylinder 2 and the lower hydraulic cylinder 5 slide downwards, the setting push cylinder 7 drives the setting mechanism to be set and hung, and the heights of the upper hydraulic cavity and the lower hydraulic cavity are gradually increased. After the long rubber sleeve 15 is set and anchored and the shearing ring 9 is broken, the upper hydraulic cylinder pressure relief hole 2b slides downwards to a position flush with the upper hydraulic cavity, so that pressure relief of the central hole above the steel ball 20 is realized, and ground personnel can judge that setting and releasing are finished.

Because the distance between the lower hydraulic cylinder through hole 5b and the top of the upper mandrel piston 4b is greater than the distance between the upper hydraulic cylinder pressure relief hole 2b and the upper joint sealing section, the lower hydraulic cylinder through hole 5b is always communicated with the upper cavity of the upper mandrel piston 4b before and after the long rubber cylinder 15 is set.

The operation process is as follows: firstly, next pipe column is arranged, and a drillable bridge plug E is arranged below an oil layer and is set.

Secondly, a drillable intubation oil extraction bridge plug D is lowered to the position above an oil layer and below the leakage breaking section by a next pipe column, a steel ball 20 is put into the pipe column, the steel ball 20 falls to the conical horn mouth of the lower mandrel 6 to be seated, the well mouth is subjected to pressure building to cut off the pin 3, the pipe column fixes the central pipe 10 and the guide shoe 19 through the upper joint 1, the upper mandrel 4, the lower mandrel 6, the conversion joint 8 and the shearing ring 9 and keeps the central pipe motionless, pressure fluid enters the upper hydraulic cavity through the upper mandrel pressure transmission hole 4a and enters the lower hydraulic cavity through the lower mandrel pressure transmission hole 6a, the upper hydraulic cylinder 2 and the lower hydraulic cylinder 5 jointly push the seat push cylinder 7 to move downwards, the lower end of the seat push cylinder 7 pushes the upper slip 12 to move downwards along the conical surface of the upper cone 13 through the push ring 11, and the lower slip 18 relatively moves upwards along the conical surface of the lower cone 17, and the large ends of the upper cone 13 and the lower cone 17 push the short rubber cylinders and the long rubber cylinders 15 from two sides, and the middle section of the long rubber 15 outwards to realize the outward bulging of the seat and the inner wall of the casing; the clamping teeth on the outer wall of the upper slip 12 and the lower slip 18 are anchored on the inner wall of the casing. Then the pressure of the well head is increased, the shearing ring 9 is broken, the releasing is realized above the shearing ring, the central pipe 10 and the setting mechanism are left under the well, and the upper joint 1, the upper core shaft 4, the lower core shaft 6, the conversion joint 8, the shearing ring 9, the upper hydraulic cylinder 2, the lower hydraulic cylinder 5 and the setting push cylinder 7 are lifted out of the well head along with the pipe column.

Thirdly, the hydraulic anchor A, the oil well pump B, the overflowing purifier C and the insertion pipe are connected and put into the well at the well mouth, the lower end of the insertion pipe is inserted into the central pipe 10 of the drillable insertion pipe oil extraction bridge plug D, and twelve sealing rings are embedded on the periphery of the insertion pipe to seal the inner wall of the central pipe 10; then the well head is pressed, so that the hydraulic anchor A is set and anchored on the inner wall of the casing.

Fourth, oil extraction is performed by starting an oil well pump B.

Fifthly, after the oil layer is mined, a oil production pipe column is started;

sixthly, drilling and grinding a tubular column, and grinding a drillable cannula oil extraction bridge plug D, a drillable bridge plug E and a lower gray surface drill at one time to directly perform oil extraction on the next oil layer.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. 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 an oil recovery device of broken hourglass well of sleeve pipe, includes the sleeve pipe, and the broken hourglass section of sleeve pipe is located the top of oil reservoir, its characterized in that: a drillable bridge plug for plugging the inner cavity of the sleeve is arranged below the oil layer, a drillable intubation oil extraction bridge plug is arranged above the oil layer, an intubation tube is inserted into a central tube of the drillable intubation oil extraction bridge plug, an overflowing purifier is arranged above the intubation tube, an oil well pump is arranged above the overflowing purifier, and the upper part of the oil well pump is connected with the oil pipe and is supported on the inner wall of the sleeve through a hydraulic anchor; the periphery of the lower end of a central pipe of the drillable intubation oil extraction bridge plug is connected with a guide shoe in a screwing mode, the upper end of the central pipe is provided with an expanded central pipe convex ring, a push ring is arranged below a step of the central pipe convex ring, and a setting mechanism is arranged between the push ring and the guide shoe; a setting push cylinder is sleeved on the periphery of the central tube convex ring, the lower end of the setting push cylinder abuts against the upper end face of the push ring, and the upper end of the setting push cylinder is in screwed connection with the periphery of the lower hydraulic cylinder; the internal thread of the central pipe convex ring is connected with a shearing ring in a rotating mode, the inner wall of the upper end of the shearing ring is connected with an adapter in a rotating mode, the upper end of the adapter is connected with a lower mandrel in a rotating mode, the outer wall of the upper portion of the lower mandrel is sealed with the inner wall of a piston of a lower hydraulic cylinder, the periphery of the upper end of the lower mandrel is connected with an upper mandrel in a rotating mode, the outer wall of a piston of the upper mandrel is sealed with the lower hydraulic cylinder, a lower hydraulic cavity is arranged between the bottom of the piston of the upper mandrel and the top of the piston of the lower hydraulic cylinder, and the upper circumference of the lower mandrel is provided with a lower mandrel pressure transmission hole communicated with the lower hydraulic cavity.

2. A casing leak-off well recovery device as defined in claim 1, wherein: the upper end of lower hydraulic cylinder has connect soon and has gone up the hydraulic cylinder, go up the lower extreme piston inner wall of hydraulic cylinder with the outer wall of top core axle realizes sealedly, the upper end of top core axle connects soon in the lower extreme internal thread of top connection, the upper portion periphery of going up the hydraulic cylinder hangs through the pin the middle part periphery of top connection, the bottom of top connection with be equipped with hydraulic chamber between the piston top of last hydraulic cylinder, the upper portion circumference of top core axle is equipped with the top core axle and passes the pressure hole and be linked together with hydraulic chamber.

3. A casing leak-off well recovery device as defined in claim 1, wherein: the setting mechanism comprises a long rubber cylinder sleeved on the periphery of the central pipe, 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 push 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 shoe.

4. A casing leak-off well recovery apparatus as claimed in claim 1, wherein: and a conical bell mouth for seating and sealing the steel ball is arranged on the inner wall of the lower mandrel below the pressure transmission hole of the lower mandrel.