CN202064883U - Perfusion packer - Google Patents

Perfusion packer Download PDF

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Publication number
CN202064883U
CN202064883U CN2011201427928U CN201120142792U CN202064883U CN 202064883 U CN202064883 U CN 202064883U CN 2011201427928 U CN2011201427928 U CN 2011201427928U CN 201120142792 U CN201120142792 U CN 201120142792U CN 202064883 U CN202064883 U CN 202064883U
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CN
China
Prior art keywords
piston
packer
assembly
central tube
perfusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011201427928U
Other languages
Chinese (zh)
Inventor
张东亭
刘延平
葛党科
李志广
齐月魁
郭群
吕金光
张飙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Dagang Oilfield Drilling Technology Development Co., Ltd.
Dagang Oilfield Group Co Ltd
Original Assignee
Dagang Oilfield Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dagang Oilfield Group Co Ltd filed Critical Dagang Oilfield Group Co Ltd
Priority to CN2011201427928U priority Critical patent/CN202064883U/en
Application granted granted Critical
Publication of CN202064883U publication Critical patent/CN202064883U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

A perfusion packer aims to overcome the defect of the conventional packer that a packing piece is easy to flush and damage during well completion operation under special well conditions such as a horizontal well and the like. The perfusion packer comprises an upper joint, a central pipe and a lower joint which are fixedly connected with each other from the top down sequentially; a packing assembly is mounted in the middle of the central pipe; a support ring above the packing assembly is fixedly connected with the central pipe; a seat sealing assembly is mounted in a position below the packing assembly; a sheath assembly is mounted on the pipe body of the central pipe above the support ring; the sheath assembly in a constraint removed state can slide upwards along the central pipe; and the piston of the sheath assembly is fixedly connected with a control piston through a shear pin mounted in the radial direction. The perfusion packer has the benefits of simple and reasonable structure, easiness in operation, safety and reliability, thereby providing reliable technical guarantee for safety during well completion projects and improving the construction operation efficiency.

Description

The perfusion packer
Technical field
The utility model relates to the packer that a kind of petroleum drilling engineering completion practice is used, and especially relates to a kind of perfusion packer.
Background technology
Packer both domestic and external is of a great variety, and packer accessory wherein mostly is rubber, by extruding rubber packer accessory, its radial dimension is increased, and until being close to the borehole wall, reaches the purpose of packing pit shaft.At present; the tamper seal spacing body adopts steel body slightly larger in diameter in packer accessory diameter mode more; in conventional well, use and to satisfy the operation needs; but when (as directional well, horizontal well etc.) use in special hole condition; because between the tubing string of connection packer and the borehole wall bigger friction takes place, packer accessory is difficult to be effectively protected.Be pressure-bearing height behind the assurance packer setting, packer accessory external diameter and borehole wall internal diameter gap are generally 10~12mm; And under special hole condition for satisfying the well control requirement, when needing running string side ring empty big discharge capacity in limit to pour into, because packer accessory is exposed outside, when the linear velocity of perfusion fluid reaches 9~12m/s, packer accessory damages packer very easily by erosion, forfeiture packing function, cause the failure of completion engineering, cause operation to be done over again or overhaul.
The utility model content
In order to overcome existing packer when the special hole condition completion practice such as horizontal well, the deficiency that packer accessory is easily damaged by erosion, the utility model provides a kind of perfusion packer.This perfusion packer damages packer accessory when having avoided big discharge capacity to pour into by the packer accessory protective device, reduces construction risk, guarantees for the completion engineering provides robust techniques.
The technical scheme that its technical problem that solves the utility model adopts is: the perfusion packer comprises top connection, central tube, lower contact, packing assembly, sets assembly, deblocking shear pin, filler ring, top connection, central tube, lower contact from top to bottom are fixedly connected sequentially, the packing assembly is installed in the central tube middle part, the filler ring of packing assembly top is fixedlyed connected with central tube, sets the below that assembly is installed in the packing assembly.On the central tube of filler ring top the sheath assembly is installed, the sheath assembly behind the constraint relief upwards slides along the central tube body.The sheath assembly comprises protective sleeve, piston, control piston, lock dog, shear pin; The control piston cylindrical is up big and down small multidiameter, and the control piston lower end part is in the endoporus of piston upper end, and piston is fixedlyed connected by the shear pin of radially installing with control piston; Gapped between the lower surface of piston and the filler ring upper surface; Lock dog is installed in the cannelure of the radially lock dog groove of control piston bottom and correspondence position central tube; Lock dog is arranged in the endoporus of piston upper end; Control piston is fixedlyed connected with the protective sleeve upper end, and the bottom of control piston, piston, packing assembly are positioned at protective sleeve.Central tube installation sheath assembly place has radially goes up pressure transmission hole, and the central tube installation sets the assembly place footpath pressure transmission hole downwards.The shear pin shear strength that connects piston and control piston is less than the shear strength that sets shear pin.The packing assembly comprises packer accessory, spacer ring, packer accessory, and from top to bottom installs.The sheath assembly is equal to or greater than the length of packing assembly along the central tube sliding distance that makes progress; Gap between the lower surface of piston and the filler ring upper surface is more than or equal to the height of lock dog.The last pressure transmission hole of central tube is positioned at the cannelure place that lock dog is installed.When the protective sleeve of sheath assembly was in non-guard mode, last pressure transmission hole was positioned at the top of piston.
The beneficial effects of the utility model are, and are simple and reasonable, and easy operating is safe and reliable, guarantee for the completion engineering safety provides reliable technique, improve construction operation efficient.
Description of drawings
Fig. 1 is the utility model perfusion packer construction schematic diagram.
Fig. 2 is that the protective sleeve of the utility model perfusion packer breaks away from the packer accessory view.
Fig. 3 is the working state schematic representation of the utility model perfusion packer.
Among the figure: 1. top connection, 2. central tube, 3. control piston, 4. protective sleeve; 5. lock dog, 6. shear pin, 7. piston, 8. filler ring; 9. packer accessory, 10. spacer ring, 11. upper pistons, 12. lower pistons; 13. the deblocking shear pin, 14. fens claws, 15. control covers, 16. set shear pin; 17. lower contact, pressure transmission hole on 18., 19. sheath assemblies; 20. the packing assembly, 21. times pressure transmission holes, 22. set assembly.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.But what those skilled in the art should know is to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
Referring to accompanying drawing 1, the structural representation of the utility model perfusion packer confined state.The utility model perfusion packer comprises central tube 2, top connection 1, lower contact 17, sheath assembly 19, packing assembly 20, sets assembly 22, deblocking shear pin 13, filler ring 8, and top connection 1, central tube 2, lower contact 17 from top to bottom are fixedly connected sequentially; Packing assembly 20 is installed in the middle part of central tube 2, and packing assembly 20 generally includes packer accessory 9, spacer ring 10, packer accessory 9, and from top to bottom installs.The filler ring 8 of packing assembly 20 tops is fixedlyed connected with central tube 2, adopts the technology that is threaded usually.Set assembly 22 and be installed in the below of packing assembly 20.
On central tube 2 bodys of filler ring 8 tops of the utility model perfusion packer sheath assembly 19 is installed, the sheath assembly 19 behind the constraint relief upwards slides along central tube 2 bodys.Sheath assembly 19 should be equal to or greater than the length of packing assembly 20 along the central tube 2 bodys sliding distance that makes progress.
Sheath assembly 19 comprises control piston 3, protective sleeve 4, lock dog 5, shear pin 6, piston 7.The cylindrical of control piston 3 is up big and down small multidiameter, and control piston 3 lower end parts are in piston 7 upper end endoporus, and piston 7 is fixedlyed connected by the shear pin of radially installing 6 with control piston 3.The shear strength of the shear pin 6 of connection piston 7 and control piston 3 is less than the shear strength that sets shear pin 16 that sets in the assembly 22.
Lock dog 5 is installed in the cannelure of the radially lock dog groove of control piston 3 bottoms and correspondence position central tube 2; Lock dog 5 is arranged in the endoporus of piston 7 upper ends.Control piston 3 is fixedlyed connected with protective sleeve 4 upper ends, and the bottom of control piston 3, piston 7, packing assembly 20 are positioned at protective sleeve 4.Gapped between the lower surface of piston 7 and filler ring 8 upper surfaces, its gap is more than or equal to the height of lock dog 5.
Central tube 2 installation sheath assemblies 19 places have radially goes up pressure transmission hole 18, and the last pressure transmission hole 18 of central tube 2 is positioned at the cannelure place that lock dog 5 is installed usually.When the protective sleeve 4 of sheath assembly 19 was in non-guard mode, last pressure transmission hole 18 was positioned at the top of piston 7.
The assembly 22 that sets in the utility model perfusion packer adopts the hydraulic setting locking mechanism.Setting assembly 22 comprises upper piston 11, lower piston 12, control cover 15, divides claw 14, upper piston 11, lower piston 12, divide claw 14 to be installed in successively on central tube 2 excircles from top to bottom, upper piston 11 and lower piston 12 are in central tube 2 lower ends not between boss and packing assembly 20 lower surfaces; Upper piston 11 is fixedlyed connected with control cover 15, and lower piston 12, branch claw 14 are positioned at control cover 15.Dividing claw 14 bottoms is special pawl screw thread, and control cover 15 endoporus divide claw 14 bottoms to have and the special pawl screw thread that divides claw 14 to be complementary.That radially installs sets shear pin 16 and will control and overlap 15 and fixedly connected with lower contact 17; Divide between claw 14 lower ends and lower contact 17 upper surfaces gapped, this gap can set after shear pin 16 cut off, upper piston 11 drives control cover 15 and moves up, special pawl screw thread of control cover 15 endoporus and the special pawl threaded engagement in branch claw 14 bottoms prevent that control cover 15 from moving down.Radially the deblocking shear pin 13 of An Zhuaning will divide claw 14 to fixedly connected with central tube 2.Following pressure transmission hole 21 is radially arranged on the central tube 2 at upper piston 11 places.
The assembly 22 that sets in the utility model perfusion packer adopts the hydraulic setting locking mechanism, but be not limited thereto, also can be other forms of the prior art, as: single, doublely set locking mechanism to fixed hydraulic, single, doublely set structure, or do not have stationary machine and set structure etc. to stationary machine.
The packing assembly 20 that is adopted in the utility model is not limited only to embodiment cited in this manual, also can comprise other forms of packing assembly.
It is as follows to adopt the utility model perfusion packer to implement well cementation packing operation process:
At first, according to technological design the utility model is poured into packer (as shown in Figure 1) and be connected, be lowered in the pit shaft with tubing string and kit; Build the pressure in the tubing string, high pressure liquid stream is through last pressure transmission hole 18, following pressure transmission hole 21, when pressure reaches shear pin 6 and cuts off design load, the shear pin 6 that connects piston and control piston 4 cut off.After shear pin 6 was cut off, piston 4 to lower slider, was removed the constraint to lock dog 5 along central tube 2; Under the effect of pressure; the cannelure that lock dog 5 ejects on the central tube 2, control piston 3 drives protective sleeve 4 and is moved upward to top connection 1 place, and packing assembly 20 is exposed (as shown in Figure 2) fully; when the protective sleeve 4 of sheath assembly 19 was in non-guard mode, last pressure transmission hole 18 was positioned at the top of piston 7.
Then, tubing string boosts to and sets shear pin 16 when cutting off design load, connects the control cover 15 that sets assembly 22 and the shear pin 16 that sets of lower contact 17 and is cut off, and upper piston 11, control cover 15 are along the central tube 2 compression packer accessory 9 that moves up, packer accessory 9 is radially increased, until being adjacent to shaft in wall; The special pawl screw thread of control cover 15 endoporus is an one with dividing the special pawl screw fastening in claw 14 lower ends simultaneously, and packer accessory 9 not resiliences after the tubing string release reach the purpose of packing annular space, can completion goes into operation by (referring to accompanying drawing 3).
If tubing string is hampered or produces when needing deblocking, the upper lifting pipe post is cut off to connect and is divided the deblocking shear pin 13 of claw 14 with central tube 2, gets final product deblocking, smoothly packer and tubing string is proposed pit shaft.
The utility model perfusion packer is compared with conventional packer, has increased sheath assembly 20, guarantees to pour into packer in the process of going into the well, and makes any relative displacement does not take place between each parts.Cut off shear pin 6 when setting and open control lock under the effect of hydraulic coupling, the protective sleeve 4 up packing assemblies 20 that make break away from protection; Improve pressure again, cut off and set shear pin 13, upper piston 11 up compression packer accessory 9 sealing annular spaces; The upper lifting pipe post is cut off deblocking shear pin 13, can smoothly packer and tubing string be proposed pit shaft.The utility model perfusion packer is suitable for hole deviation≤90 °, guarantees that big hole deviation to the completion practice construction of horizontal well carries out smoothly, effectively improves job success ratio.
It should be noted that the foregoing description is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the claim scope of this patent.

Claims (6)

1. perfusion packer, comprise top connection, central tube, lower contact, packing assembly, set assembly, deblocking shear pin, filler ring, top connection, central tube, lower contact from top to bottom are fixedly connected sequentially, the packing assembly is installed in the central tube middle part, the filler ring of packing assembly top is fixedlyed connected with central tube, set assembly and be installed in the below of packing assembly, it is characterized in that: on central tube (2) body of described filler ring (8) top sheath assembly (19) is installed, the sheath assembly (19) behind the constraint relief upwards slides along central tube (2).
2. perfusion packer according to claim 1 is characterized in that: described sheath assembly (19) comprises protective sleeve (4), piston (7), control piston (3), lock dog (5), shear pin (6);
Described control piston (3) cylindrical is up big and down small multidiameter, and control piston (3) lower end part is in the endoporus of piston (7) upper end, and piston (7) is fixedlyed connected by the shear pin of radially installing (6) with control piston (3); Gapped between the lower surface of piston (7) and filler ring (8) upper surface;
Described lock dog (5) is installed in the cannelure of the radially lock dog groove of control piston (3) bottom and correspondence position central tube (2); Lock dog (5) is arranged in the endoporus of piston (7) upper end;
Described control piston (3) is fixedlyed connected with protective sleeve (4) upper end, and the bottom of control piston (3), piston (7), packing assembly (20) are positioned at protective sleeve (4);
Described central tube (2) is installed sheath assembly (19) and has been located radially to go up pressure transmission hole (18), and described central tube (2) installation sets assembly (22) and located footpath pressure transmission hole (21) downwards;
The shear strength of described shear pin (6) is less than the shear strength that sets shear pin (16).
3. perfusion packer according to claim 2 is characterized in that: described packing assembly (20) comprises packer accessory (9), spacer ring (10), packer accessory (9), and from top to bottom installs.
4. perfusion packer according to claim 3 is characterized in that: described sheath assembly (19) along central tube (2) upwards sliding distance equal or be slightly larger than the length of packing assembly (20); Gap between the lower surface of described piston (7) and filler ring (8) upper surface is more than or equal to the height of lock dog (5).
5. perfusion packer according to claim 1 is characterized in that: the last pressure transmission hole (18) of described central tube (2) is positioned at the cannelure place that lock dog (5) is installed.
6. perfusion packer according to claim 4 is characterized in that: when the protective sleeve (4) of described sheath assembly (19) was in non-guard mode, last pressure transmission hole (18) was positioned at the top of piston (7).
CN2011201427928U 2011-05-06 2011-05-06 Perfusion packer Expired - Lifetime CN202064883U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201427928U CN202064883U (en) 2011-05-06 2011-05-06 Perfusion packer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201427928U CN202064883U (en) 2011-05-06 2011-05-06 Perfusion packer

Publications (1)

Publication Number Publication Date
CN202064883U true CN202064883U (en) 2011-12-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201427928U Expired - Lifetime CN202064883U (en) 2011-05-06 2011-05-06 Perfusion packer

Country Status (1)

Country Link
CN (1) CN202064883U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182420A (en) * 2011-05-06 2011-09-14 大港油田集团有限责任公司 Perfusion packer
CN104563977A (en) * 2013-10-12 2015-04-29 中国石油化工股份有限公司 Perforation device and method for perforation by using perforation device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182420A (en) * 2011-05-06 2011-09-14 大港油田集团有限责任公司 Perfusion packer
CN102182420B (en) * 2011-05-06 2013-12-04 大港油田集团有限责任公司 Perfusion packer
CN104563977A (en) * 2013-10-12 2015-04-29 中国石油化工股份有限公司 Perforation device and method for perforation by using perforation device
CN104563977B (en) * 2013-10-12 2017-08-25 中国石油化工股份有限公司 Perforating system and the method using its perforation

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20120711

Address after: Three Dagang oil field, Tianjin, Grand Port, No. 300280

Co-patentee after: Tianjin Dagang Oilfield Drilling Technology Development Co., Ltd.

Patentee after: Dagang Oil Field Group Co., Ltd.

Address before: Three Dagang oil field, Tianjin, Grand Port, No. 300280

Patentee before: Dagang Oil Field Group Co., Ltd.

C41 Transfer of patent application or patent right or utility model
ASS Succession or assignment of patent right

Owner name: TIANJIN DAGANG OIL FIELD DRILLING TECHNOLOGY DEVEL

Effective date: 20120711

RGAV Abandon patent right to avoid regrant
AV01 Patent right actively abandoned

Granted publication date: 20111207

Effective date of abandoning: 20131204