CN114086907B

CN114086907B - Traversing type production packer

Info

Publication number: CN114086907B
Application number: CN202111182751.6A
Authority: CN
Inventors: 左凯; 李宝龙; 张斌; 张明; 齐海涛; 张少朋; 刘晓峰; 郝宙正; 闫绅
Original assignee: China National Offshore Oil Corp CNOOC; CNOOC Energy Technology and Services Ltd
Current assignee: China National Offshore Oil Corp CNOOC; CNOOC Energy Technology and Services Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2023-07-28
Anticipated expiration: 2041-10-11
Also published as: CN114086907A

Abstract

The invention discloses a traversing type production packer, which can traverse a pipeline through an upper joint and a pipeline protection mechanism, and the pipeline protection mechanism can prevent the pipeline from being damaged by extrusion; the shoulder on the slip cage and the shoulder on the upper cone in the anchoring mechanism are axially positioned to prevent the slip cage from moving downwards to cause the slip to open, the round-head rectangular groove on the slip cage and the guide pin on the lower cone are axially positioned to prevent the slip cage from moving upwards to cause the slip to open, and the anchoring mechanism can prevent the slip from being accidently seated in the process of putting the packer into a well bore; the slip cage and the upper cone are connected together through the slip setting pin, so that the setting process of the slip is that the lower part is firstly set and then the upper part is set, and the problem of anchoring failure caused by no lower cone support at the lower part of the slip is avoided; the upper piston sleeve is connected with the upper joint through a rubber sleeve setting pin, the slips are set firstly during setting, and then the rubber sleeve is set, so that the pipe column is ensured to be motionless during setting of a plurality of packers simultaneously.

Description

Traversing type production packer

Technical Field

The invention belongs to the technical field of oil and gas well completion, and particularly relates to a traversing type production packer.

Background

In the field of oil and gas intelligent completion technology, it is necessary to control downhole tools using hydraulic control lines and/or cables that are connected to the surface and that need to be traversed through a packer. Thus, traversing production packers are an important tool in intelligent completions. At present, most of commonly used traversing packers are integrated mandrels, so that the traversing packer is complex in structure, high in processing difficulty and heavy in weight, and the problems can be solved by adopting a split mandrel design. In the process of setting the packer, the slip cage is not axially fixed, and if the slip cage is set down and meets the resistance, the packer is extremely easy to be set before setting. During setting, if the slips are moved to a resistance, only the upper cone will support the slips, the lower cone will not support the slips, and the slips are released as the packer is moved up, resulting in failure of the anchor. The key to realizing safe and reliable traversing production packer is to solve the above problems. In the hydraulic control type intelligent well completion, because the hydraulic control pipeline is used for controlling the downhole tool, if the hydraulic control pipeline is used for setting the packer, the wire operation casting and fishing blanking plug can be omitted, and the time and the cost are saved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a traversing type production packer.

The invention is realized by the following technical scheme:

a traversing packer comprises an upper joint, wherein the lower end of the upper joint is externally connected with a mandrel, the lower end of the upper joint is internally connected with a connecting pipe, and a rubber cylinder, a setting mechanism, a rubber cylinder locking mechanism, an anchoring mechanism, an deblocking mechanism and a pipeline protection mechanism are sleeved outside the upper joint and the mandrel from top to bottom at one time;

the setting mechanism comprises an upper piston, a sleeve, a lower piston and a rubber cylinder setting pin, wherein the upper piston is sleeved on the upper joint and is connected with the upper piston through the rubber cylinder setting pin, the sleeve is connected with the upper piston, and the lower piston is arranged between the mandrel and the sleeve;

the rubber cylinder locking mechanism comprises an upper locking ring sleeve, an upper locking ring, an upper anti-rotation pin and a shearing sleeve, wherein the upper end of the upper locking ring sleeve is connected with a sleeve, the lower end of the upper locking ring sleeve is connected with the shearing sleeve, the upper locking ring is connected inside the upper locking ring sleeve, the upper anti-rotation pin is arranged on the upper locking ring sleeve, and the shearing sleeve is connected with a lower piston through a setting starting pin;

the anchoring locking mechanism comprises a connecting sleeve, a connecting pin, a lower locking ring, a lower rotation preventing pin and a lower locking ring sleeve, wherein the upper end of the connecting sleeve is connected with a lower piston, the lower end of the connecting sleeve is connected with the lower locking ring sleeve through the connecting pin, the lower locking ring is arranged in the lower locking ring sleeve, and the lower rotation preventing pin is arranged on the lower locking ring sleeve;

the anchoring mechanism comprises an upper cone, a slip spring, slips, a slip cage, a guide pin, a lower cone and a key, wherein the upper end of the upper cone is connected with a lower lock ring sleeve, the lower end of the upper cone is inserted into the lower cone, the slip cage is sleeved on the upper cone and the lower cone, the slip cage is connected with the upper cone through a slip setting pin, the slip cage is connected with the lower cone through the guide pin, the guide pin is connected with the lower cone, the slips are installed inside the slip cage, the slip spring is installed between the slip cage and the slips, and the key is installed on a mandrel;

the deblocking mechanism comprises a lower joint, a limiting sleeve and deblocking pins, wherein the upper end of the lower joint is connected with a lower cone, the limiting sleeve is connected with a mandrel, and the lower joint is connected with the limiting sleeve through the deblocking pins;

the pipeline protection mechanism comprises a ferrule and a bushing, wherein the bushing is sleeved inside the lower joint, and the ferrule is connected with the lower joint.

In the technical scheme, the upper joint is provided with a plurality of pipeline penetrating through holes, and one section of the upper end of each pipeline penetrating through hole is provided with threads for connecting with the sealing joint; the upper joint is provided with a pressure transmission hole.

In the technical scheme, one hole of the pipeline penetrating through holes on the upper joint is changed into a blind hole from the through hole, a setting pressure transmission channel is additionally arranged, and the setting mode of the packer is changed into hydraulic pipeline setting.

In the above technical scheme, be equipped with a plurality of first recesses on the top connection, be equipped with the cotter hole on the top piston, packing element setting cotter one end is installed in the cotter hole of top piston, and the other end inserts in the first recess of top connection.

In the technical scheme, the slip cage is provided with the pin hole, the slip setting pin is arranged in the pin hole, one end of the slip setting pin is inserted into the second groove of the upper cone, the slip cage is provided with the first shoulder, the first shoulder and the second shoulder on the upper cone are matched to play an axial limiting role, the slip cage is provided with a plurality of round-head rectangular grooves, and the round-head rectangular grooves and the guide pin are matched to play an axial limiting role.

In the above technical scheme, the upper cone is provided with a second groove, a second shoulder and a key groove.

In the technical scheme, a key groove, a large hole and a threaded hole are formed in the lower cone, and a guide pin is installed on the threaded hole.

In the technical scheme, the bushing is provided with the pipeline penetrating hole.

The invention has the advantages and beneficial effects that:

the invention has the advantages and positive effects that:

1. the upper joint is provided with pipeline penetrating holes which can penetrate through a plurality of pipelines, the threaded connectable sealing joint is arranged to realize sealing, the lining is also provided with pipeline penetrating holes, the lining sleeve plays a role in righting the connecting pipe in the lower joint, and the lining is positioned through the hoop sleeve, so that the disassembly is convenient. The invention has the advantages and positive effects of facilitating pipeline penetration and preventing pipeline extrusion damage.

2. The axial positioning of the shoulders on the slip cage and the upper cone prevents the slip cage from moving downwards to open the slips, and the axial positioning of the round-head rectangular groove on the slip cage and the guide pin on the lower cone prevents the slip cage from moving upwards to open the slips. The invention has the advantage and positive effect of preventing the slips from being set accidentally during the process of setting the packer into the well bore.

3. The slip cage and the upper cone are connected together through slip setting pins, the cone moves downwards during setting, the slip cage moves downwards under the drive of the slip setting pins to push the slips to move downwards, the lower cone opens the lower part of the slips, the lower part of the slips bites into the sleeve, then the slip setting pins are sheared off, the upper cone moves downwards to open the upper part of the slips, and the upper part of the slips bites into the sleeve. The invention has the advantages that the setting process of the slips is that the lower part is firstly set and then the upper part is set, so that the problem of anchoring failure caused by the fact that the lower part of the slips is not supported by a lower cone is avoided.

4. The upper piston sleeve is connected with the upper joint through a rubber barrel setting pin, the shearing force of the rubber barrel setting pin is larger than that of a setting starting pin, the slips are firstly set during setting, then the rubber barrel is set, and the pipe column is ensured to be motionless during setting of a plurality of packers.

5. One hole of the pipeline penetrating through the through hole on the upper joint is changed into a blind hole from the through hole, a setting pressure transmission channel is additionally arranged, the setting mode of the packer can be changed into hydraulic pipeline setting, and steel wire operation is saved.

Drawings

FIG. 1 is a schematic illustration of a crossover production packer construction in accordance with the present invention.

Fig. 2a is a schematic structural view (one) of a first structure of the upper joint in embodiment 1 of the present invention.

Fig. 2b is a schematic structural view (two) of the first structure of the upper joint in embodiment 1 of the present invention.

Fig. 3 is a schematic view of the upper piston structure in the present invention.

Fig. 4 is a schematic view of a partial structure of an anchoring mechanism according to the present invention.

Fig. 5a is a schematic diagram (a) of a slip cage according to the present invention.

Fig. 5b is a schematic diagram (ii) of the slip cage according to the present invention.

FIG. 6a is a schematic view of the upper cone structure (one) in the present invention.

FIG. 6b is a schematic diagram of the upper cone structure (II) in the present invention.

Fig. 7a is a schematic view of the lower cone structure (one) in the present invention.

Fig. 7b is a schematic view of the lower cone structure (II) in the present invention.

Fig. 8 is a schematic view of the bushing structure of the present invention.

Fig. 9 is a schematic structural view of a second structure of the upper joint in embodiment 2 of the present invention.

Wherein: 1 is an upper joint, 2 is a gauge ring, 3 is an upper piston, 4 is a sleeve, 5 is a mandrel, 6 is a lower piston, 7 is an upper lock ring sleeve, 8 is an upper lock ring, 9 is an upper rotation preventing pin, 10 is a shearing sleeve, 11 is a connecting sleeve, 12 is a connecting pin, 13 is a lower lock ring, 14 is a lower rotation preventing pin, 15 is a lower lock ring sleeve, 16 is an upper cone, 17 is a slip spring, 18 is a slip, 19 is a slip cage, 20 is a guiding pin, 21 is a lower cone, 22 is a key, 23 is a lower joint, 24 is a limit sleeve, 25 is a collar, 26 is a bushing, 27 is a connecting pipe, 28 is a rubber sleeve, 29 is a setting starting pin, 30 is a deblocking pin, 31 is a slip setting pin, 32 is a rubber sleeve setting pin, 33 is a pipeline passing through hole, 34 is a thread, 35 is a pressure transmitting hole, 36 is a first groove, 37 is a pin hole, 38 is a pin hole, 39 is a first shoulder, 40 is a round-nose rectangular groove, 41 is a second groove, 42 is a second groove, 43 is a key groove, 44 is a large hole, 45 is a blind hole, 46 is a blind hole, and 48 is a setting hole is a setting through hole.

Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.

Detailed Description

In order to make the person skilled in the art better understand the solution of the present invention, the following describes the solution of the present invention with reference to specific embodiments.

Example 1

Referring to FIG. 1, a crossover production packer. The device mainly comprises an upper joint 1, wherein the lower end of the upper joint 1 is externally connected with a mandrel 5, the lower end of the upper joint 1 is internally connected with a connecting pipe 27, and a rubber cylinder 28, a setting mechanism, a rubber cylinder locking mechanism, an anchoring mechanism, an deblocking mechanism and a pipeline protection mechanism are sleeved outside the upper joint 1 and the mandrel 5 from top to bottom.

The setting mechanism comprises an upper piston 3, a sleeve 4, a lower piston 6 and a rubber cylinder setting pin 32. The upper piston 3 is sleeved on the upper joint 1, the upper joint and the upper piston are connected through a rubber sleeve setting pin 32, the sleeve 4 is connected with the upper piston 3, and the lower piston 6 is arranged between the mandrel 5 and the sleeve 4.

The rubber cylinder locking mechanism comprises an upper locking ring sleeve 7, an upper locking ring 8, an upper anti-rotation pin 9 and a shearing sleeve 10. The upper lock ring sleeve 7 is connected with the sleeve 4 at the upper end, the shear sleeve 10 is connected with the lower end, the upper lock ring 8 is connected inside, the upper rotation-preventing pin 9 is arranged on the upper lock ring sleeve 7, and the shear sleeve 10 is connected with the lower piston 6 through the setting starting pin 29.

The anchoring locking mechanism comprises a connecting sleeve 11, a connecting pin 12, a lower locking ring 13, a lower rotation preventing pin 14 and a lower locking ring sleeve 15. The upper end of the connecting sleeve 11 is connected with the lower piston 6, the lower end of the connecting sleeve is connected with the lower lock ring sleeve 15 through the connecting pin 12, the lower lock ring 13 is arranged inside the lower lock ring sleeve 15, and the lower anti-rotation pin 14 is arranged on the lower lock ring sleeve 15.

The anchoring mechanism includes an upper cone 16, a slip spring 17, slips 18, a slip cage 19, a guide pin 20, a lower cone 21, and a key 22. The upper end of the upper cone 16 is connected with the lower lock ring sleeve 15, the lower end is inserted into the lower cone 21, the slip cage 19 is sleeved on the upper cone 16 and the lower cone 21, the slip cage 19 and the upper cone 16 are connected through the slip setting pin 31, the slip cage 19 and the lower cone 21 are connected through the guide pin 20, the guide pin 20 is connected on the lower cone 21, the slip 18 is installed inside the slip cage 19, the slip spring 17 is installed between the slip cage 19 and the slip 18, and the key 22 is installed on the mandrel 5.

The deblocking mechanism comprises a lower joint 23, a limiting sleeve 24 and a deblocking pin 30. The upper end of the lower joint 23 is connected with the lower cone 21, the limiting sleeve 24 is connected with the mandrel 5, and the lower joint 23 and the limiting sleeve 24 are connected through a deblocking pin 30.

The line protection mechanism includes a ferrule 25 and a bushing 26. The bushing 26 is sleeved inside the lower joint 23, and the ferrule 25 is connected with the lower joint 23.

Referring to fig. 2, the upper joint 1 is provided with a plurality of pipeline penetrating through holes 33, and a section of threads 34 at the upper end of the pipeline penetrating through holes 33 is used for connecting with a sealing joint; the upper joint is provided with a pressure transmission hole 35.

Referring to fig. 2 and 3, the upper joint 1 is provided with a plurality of first grooves 36, the upper piston 3 is provided with pin holes 37, one end of the packing element setting pin 32 is installed in the pin holes 37 of the upper piston 3, and the other end is inserted into the first grooves 36 of the upper joint 1.

Referring to fig. 4 and 5, the slip cage 19 is provided with a pin hole 38, a slip setting pin 31 is installed in the pin hole 38, one end of the slip setting pin 31 is inserted into a second groove 41 of the upper cone 16, the slip cage 19 is provided with a first shoulder 39, the first shoulder 39 and a second shoulder 42 on the upper cone 16 cooperate to play an axial limiting role, the slip cage 19 is provided with a plurality of round-head rectangular grooves 40, and the round-head rectangular grooves 40 and the guide pins 20 cooperate to play an axial limiting role.

Referring to fig. 4 and 6, the upper cone 16 is provided with a second recess 41, a second shoulder 42 and a keyway 43.

Referring to fig. 4 and 7, the lower cone 21 is provided with a key slot 43, a large hole 44 and a threaded hole 45, and the threaded hole 45 is provided with the guide pin 20.

Referring to fig. 8, bushing 26 is provided with a line traversing hole 46.

Example 2

Referring to fig. 9, an improvement is made on the basis of the upper joint 1 of the embodiment, one of the through holes of the pipeline penetrating through the upper joint 1 is changed into a blind hole 47, and a setting pressure transmission channel 48 is arranged, so that the setting mode of the packer can be changed into hydraulic pipeline setting.

Example 3

The working principle of the traversing type production packer is as follows:

in the assembled state of the packer, the upper piston 3 is prevented from moving by the packing element setting pin 32, the packing element is not compressed, the lower piston 6 is prevented from moving by the setting start pin 29, and the upper cone 16 is fixed. When the slips 18 or the slip cage 19 are put into a blocking state, the guide pins 20 prevent the slip cage 19 from moving upwards, so that the slips 18 can be prevented from being set forward; when the slips 18 or slip cage 19 are lifted up, the second shoulder 42 on the upper cone 16 prevents the slip cage 19 from moving down, preventing the slips 18 from being set forward. The spindle 5 is provided with a key 22, the key 22 passing through keyways 41 and 43 in the upper and lower fittings 16 and 21 to prevent rotation of the upper and lower cones 16 and 21 relative to the spindle 5.

When the pipeline passes through the packer, the collar 25 and liner 26 are removed. If the tubing is to be run from the lower end to the upper end of the packer, the tubing is first run through the tubing pass-through hole 46 in the liner 26 and then run through the tubing pass-through hole 33 in the upper sub 1. The bush 26 is placed inside the lower joint 23, and the ferrule 25 and the lower joint 23 are connected. When the pipeline is threaded from the upper end to the lower end of the packer, the pipeline is first threaded through the pipeline through hole 33 on the upper joint 1, then threaded through the pipeline through hole 46 on the bushing 26, the bushing 26 is placed inside the lower joint 23, and the ferrule 25 is connected with the lower joint 23. Since the pipeline is within the pipeline penetration hole 46 of the liner 26, the shaking of the connection pipe 27 does not squeeze the damaged pipeline.

When the first structure of the upper joint 1 in the embodiment 1 is adopted for setting, the packer is put into a blanking plug at the lower end, the pressure is pressed in an oil pipe, the pressure is transmitted to the upper piston 3 and the lower piston 6 through the pressure transmission hole 35 on the upper joint 1, the lower piston 6 moves downwards to shear the setting starting pin 29, the connecting sleeve 11, the lower locking ring sleeve 15 and the upper cone 16 are pushed to move downwards, the upper cone 16 drives the slip cage 19 to move downwards through the slip setting pin 31, the slip cage 19 pushes the slip 18 to move downwards, and the lower part of the slip 18 is propped up by the lower cone 21 to bite into the sleeve. The slip setting pin 31 is then sheared and the upper cone 16 continues to move downwardly to prop open the upper portion of the slips 18 into engagement with the casing. In the process of moving the setting slips 18 downwards by the lower piston 6, the lower lock ring 13 moves downwards under the drive of the lower lock ring sleeve 15 and bites the mandrel 5 to prevent the mandrel from retreating. Continuing to increase the pressure, the packing element setting pin 32 is sheared and the packing element 28 is set completely. The upper lock ring 8 and the lower piston 6 are locked to prevent the retraction.

When the second structure of the upper joint 1 in the embodiment 2 is adopted, the pressure is pressurized from the hydraulic control pipeline, and the pressure is transmitted to the upper piston 3 and the lower piston 6 through the setting pressure transmission channel 48 on the upper joint 1, and the subsequent packer setting principle is the same as that when the first structure of the upper joint 1 is adopted.

And when the pipe is unpacked, the pipe column is directly lifted. Because the slips 18 are locked and meshed with the casing, the lower cone 21 and the lower joint 23 are not moved, the upper joint 1 drives the mandrel 5 and the limiting sleeve 24 to move upwards, the deblocking pin 30 is sheared, the slips 18 lose the support of the upper cone 16 and the lower cone 21 and are released, and the packer is deblocked.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The foregoing has described exemplary embodiments of the invention, it being understood that any simple variations, modifications, or other equivalent arrangements which would not unduly obscure the invention may be made by those skilled in the art without departing from the spirit of the invention.

Claims

1. A traversing production packer, characterized by: the device comprises an upper joint, wherein the outer part of the lower end of the upper joint is connected with a mandrel, the inner part of the lower end of the upper joint is connected with a connecting pipe, and a rubber cylinder, a setting mechanism, a rubber cylinder locking mechanism, an anchoring mechanism, an deblocking mechanism and a pipeline protection mechanism are sleeved outside the upper joint and the mandrel from top to bottom at one time;

the pipeline protection mechanism comprises a ferrule and a bushing, wherein the bushing is sleeved inside the lower joint, and the ferrule is connected with the lower joint;

the slip cage is provided with a pin hole, a slip setting pin is arranged in the pin hole, one end of the slip setting pin is inserted into a second groove of the upper cone, the slip cage is provided with a first shoulder, the first shoulder is matched with a second shoulder on the upper cone to play an axial limiting role, the slip cage is provided with a plurality of round-head rectangular grooves, and the round-head rectangular grooves are matched with the guide pins to play an axial limiting role; the upper cone is provided with a second groove, a second shoulder and a key groove; the lower cone is provided with a key groove, a large hole and a threaded hole, and the threaded hole is provided with a guide pin.

2. The crossover production packer of claim 1, wherein: the upper joint is provided with a plurality of pipeline penetrating through holes, and one section of the upper end of the pipeline penetrating through holes is provided with threads for connecting the sealing joint; the upper joint is provided with a pressure transmission hole.

3. A crossover production packer as defined in claim 2, wherein: one hole of the pipeline penetrating through the through hole on the upper joint is changed into a blind hole from the through hole, and a setting pressure transmission channel is additionally arranged.

4. The crossover production packer of claim 1, wherein: the upper joint is provided with a plurality of first grooves, the upper piston is provided with pin holes, one end of the rubber cylinder setting pin is arranged in the pin holes of the upper piston, and the other end of the rubber cylinder setting pin is inserted into the first grooves of the upper joint.

5. The crossover production packer of claim 1, wherein: and a pipeline penetrating hole is formed in the bushing.