CN203420665U - Double-acting compression type packer - Google Patents
Double-acting compression type packer Download PDFInfo
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- CN203420665U CN203420665U CN201320469402.7U CN201320469402U CN203420665U CN 203420665 U CN203420665 U CN 203420665U CN 201320469402 U CN201320469402 U CN 201320469402U CN 203420665 U CN203420665 U CN 203420665U
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- outer tube
- packer
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- slips
- central tube
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Abstract
The utility model relates to an underground packer with the double-compression function. A center pipe of the packer is sleeved with an outer pipe, an outer step at the upper end of the center pipe corresponds to an inner step at the upper end of the outer pipe, a rubber sleeve sealing mechanism is arranged at the upper end of the outer pipe in a sleeved mode, an anchor mechanism is arranged in the middle of the outer pipe in a sleeved mode and located below the rubber sleeve sealing mechanism, a hydraulic mechanism is arranged at the lower end of the outer pipe in a sleeved mode and connected with the anchor mechanism, a square hole is distributed in the circumferential direction of the lower portion of the outer pipe, a locking block is installed in the square hole, the locking block protrudes out in the radial direction and is embedded into an inner groove of the hydraulic mechanism, a circumferential groove is formed in the periphery of the center pipe and located below the locking block, and the center pipe and the outer pipe are connected together in the axial direction through a shear pin below the circumferential groove. After the hydraulic mechanism finishes the setting action, downward pressed mechanical force fed into a tubular column is adopted to compress a rubber sleeve, a locking ring is utilized to lock the compression and deformation of the rubber sleeve from the tubular column, and therefore the contact stress between the rubber sleeve and a casing pipe of the packer is improved well, and then the sealing performance of the packer is improved.
Description
Technical field
The utility model relates to the downhole packer technical field of using in oil exploitation, particularly relates to a kind of downhole packer with hydraulic pressure, the two compressions of machinery.
Background technology
In the operations such as the completion of field of petroleum exploitation, oil recovery, often with downhole packer, separate oil reservoir, Seal Oil cover annular space, hang down-hole string etc.According to the classification of packer, having a kind of is compression, and as Y441, Y445, Y341 etc., " Y " wherein refer to that the cartridge of using on packer is compression type glue barrel; Second-order digit wherein " 4 " refers to that the compress mode of packing element is to adopt hydraulic setting packer, and this is a kind of mode that sets of conventional packer.
Desk research and experiment show, the packing element of compression packer is after packer setting, packing element be radially inhomogeneous in the axial direction with the contact stress of institute Sealed casing pipe, larger near one end contact stress that sets fluid cylinder, less away from one end contact stress that sets fluid cylinder, the research of this respect can reference: Liu Tianliang, Shi Jize. and packing element is to the research of sleeve pipe contact stress simulated test. petroleum machinery, 2001,29(2): 10～11.
The hydraulic packer of conventional design, as Y441 type, with reference to Gu Kaizhao, Zhang Furen, ancient light etc., the structural analysis of Y441B type Bidirectional anchoring packer. petroleum machinery, 1997, 25(6): 1～3, packer can only set by hydraulic coupling on the one hand, setting force is restricted, can not increase substantially setting force, on the other hand, after packer setting, As time goes on the impact that is subject to sealing load, contact stress between packing element and sleeve pipe can become evenly gradually in the axial direction, contact stress also can diminish, the sealability of packer is also along with remarkable reduction.
Summary of the invention
For improving the sealability of the compression packer of hydraulic setting, invented hydraulic setting and added and send into tubing string pressurization and set double acting compression packer.
The utility model has adopted following technical scheme: double acting compression packer, comprises central tube, outer tube, packing element sealing mechanism, anchor mechanism, hydraulic mechanism.Central tube overcoat has outer tube, the outer step of central tube upper end is corresponding with the interior step of outer tube upper end, packing element sealing mechanism is enclosed within outer tube upper end, and anchor mechanism is enclosed within outer tube middle part and is positioned at below packing element sealing mechanism, and hydraulic mechanism is enclosed within outer tube lower end and is connected with anchor mechanism; Square hole is circumferentially laid in outer tube bottom, and lock dog is housed in square hole, in the inner groovy of the radially outstanding embedding hydraulic mechanism of lock dog; Below lock dog and in the periphery of central tube, offer circumferential recess, below circumferential recess, with shear pin, central tube and outer axial tube are upwards connected together.
The use step of double acting compression packer is:
A, with oil pipe or drilling rod, double acting compression packer is sent into downhole designs position, its necessary pipe string combination is: oil pipe or drilling rod+double acting compression packer+pressure controller;
In b, raising tubing string, hydraulic coupling reaches the design load of double acting compression packer setting force;
Hydraulic coupling in c, maintenance or reduction tubing string, but should guarantee that the hydraulic coupling in tubing string is greater than the hydraulic coupling in oil jacket annular space;
D, from well head, transfer and send into tubing string and load mechanical force to double acting compression packer;
E, shed the hydraulic coupling in tubing string
Double acting compression packer also can be installed like this:
A, with oil pipe or drilling rod, double acting compression packer is sent into downhole designs position, its necessary pipe string combination is: oil pipe or drilling rod+double acting compression packer+pressure controller;
In b, raising tubing string, hydraulic coupling reaches the design load of double acting compression packer setting force;
C, shed the hydraulic coupling in tubing string;
D, from well head, transfer and send into tubing string and load mechanical force and well head is installed to double acting compression packer;
E, again improve the hydraulic coupling in tubing string, then shed the hydraulic coupling in tubing string.
Compared with prior art, the beneficial effects of the utility model are, outer tube has been installed packing element sealing mechanism, anchor mechanism and hydraulic mechanism outward from top to bottom successively, after hydraulic mechanism sets and has moved, can utilize and send into the mechanical force that tubing string presses down and compress packing element, and by lock ring, tubing string is locked the compressive strain of packing element, so just can improve better the contact stress between packing element and sleeve pipe, thereby improve the sealability of packer.
Accompanying drawing explanation
Fig. 1 be double acting compression packer partly cut open structural representation.
Fig. 2 is the mounting pipe rod structure schematic diagram of double acting compression packer.
The specific embodiment
For convenience of narration, double acting compression packer is called packer in following part.
As shown in Figure 1:
There is screw thread top connection 1 upper end for connecting other instrument or tubing string, and lower end is connected with central tube 2.
Anchor mechanism is enclosed within outer tube 3 middle parts and is positioned at below packing element sealing mechanism.Anchor mechanism comprises upper cone 6, lower cone 10, slips 8, spring 9 and slips cage.Slip sleeve 7 lower ends are connected with cone pressure cap 11 and form slips cage.Upper cone 6 and lower cone 10 are arranged on the two ends up and down in slips cage, and the interior step of slips cage blocks the outer step of upper cone 6 and lower cone 10, and slips 8 is between upper cone 6 and lower cone 10.A plurality of slips 8 circumferentially distribute along outer tube 3.The radially-outer surface of slips 8 is provided with slip insert 33, and slip insert 33 stretches out from inside to outside from the tapping of slips cage, and spring 9 is diametrically between slips 8 and slips cage.
Piston 16 upper end endoporus are provided with inner groovy, and lock dog pressure cap 14 is connected with piston 16 and jointly forms inner groovy.Square hole is circumferentially laid in outer tube 3 bottoms, and lock dog 15 is housed in square hole, and lock dog 15 is radially outstanding to be embedded in inner groovy; Below lock dog 15 and in the periphery of central tube 2, offer circumferential recess 37, on circumferential recess is axial central tube 2 and outer tube 3 with shear pin 17 below 37, connect together.
There is connecting thread piston lower end, for connecting other instrument or tubing string.
For the hydraulic coupling in assurance packer, do not leak, in each sealing place of packer, be provided with airtight and watertight padding groove, inside establish airtight and watertight padding.
While setting, in packer central tube 2, beat hydraulic pressure, liquid enters hydraulic cavities 34 by center pore 35 and outer pore 36, promote the up compression packing element 4 of fluid cylinder grappling slips 8, fluid cylinder drives lock ring 18 up along locking screw 38, when shedding hydraulic coupling, the displacement of fluid cylinder is locked by lock ring 18, thereby keeps compressive state and the anchorage force of anchor mechanism on sleeve pipe of packing element 4.When hydraulic setting power reaches after design load, keeping or not exclusively shedding under the state of hydraulic coupling, by sending into tubing string, press down top connection 1, downforce passes to packing element 4 by outer tube 3, packing element 4 lower ends are anchored mechanism and support, outer tube 3 again compresses packing element 4 on the basis of hydraulic setting power, and outer tube 3 is descending together with central tube 2, lock dog 15, piston 16, lock dog pressure cap 14, shear pin 17, and this line displacement is locked by lock ring 18 again.
As shown in Figure 2, in oil well casing 51, send into oil pipe or drilling rod 52, under connect packer 53, under connect pressure controller 54.Pressure controller 54 can be blind plugging, ball-and-seat, restriction choke or pitching ball seat etc., for making the inside and outside pressure reduction that forms of packer 53.This is necessary mounting pipe column combination, can carry out combined string according to need of production in actual applications.
The installation steps of double acting compression packer are:
A, with oil pipe or drilling rod 52, packer 53 is sent into downhole designs position, its necessary pipe string combination is: oil pipe or drilling rod 52+ packer 53+ pressure controller 54;
In b, raising tubing string, hydraulic coupling reaches the design load of packer 53 setting forces;
Hydraulic coupling in c, maintenance or reduction tubing string, but should guarantee that the hydraulic coupling in tubing string is greater than the hydraulic coupling in oil jacket annular space;
D, from well head, transfer and send into tubing string and load mechanical forces to packer 53;
E, shed the hydraulic coupling in tubing string.
Double acting compression packer can also be installed by following steps:
A, with oil pipe or drilling rod 52, packer 53 is sent into downhole designs position, its necessary pipe string combination is: oil pipe or drilling rod 52+ packer 53+ pressure controller 54;
In b, raising tubing string, hydraulic coupling reaches the design load of packer 53 setting forces;
C, shed the hydraulic coupling in tubing string;
D, from well head, transfer and send into tubing string and load mechanical forces and well head is installed to packer 53;
E, again improve the hydraulic coupling in tubing string, then shed the hydraulic coupling in tubing string.
In above-mentioned installation steps, described loading mechanical force is different for the packer of different size, universal law is that the needed loading mechanical force of more large-sized packer is larger, can be from 50kN～250kN not etc., certainly, the required loading mechanical force of greater or lesser packer also can break through this scope.For being applied to 139.7mm, 5
1/
2" the loading mechanical force of packer of sleeve pipe can be 70kN～120kN; The loading mechanical force of the packer of sleeve pipe for being applied to 177.8mm, 7 " can be 80kN～150kN.
Claims (6)
1. double acting compression packer, comprise central tube, outer tube, packing element sealing mechanism, anchor mechanism, hydraulic mechanism, it is characterized in that, central tube overcoat has outer tube, the outer step of central tube upper end is corresponding with the interior step of outer tube upper end, packing element sealing mechanism is enclosed within outer tube upper end, and anchor mechanism is enclosed within outer tube middle part and is positioned at below packing element sealing mechanism, and hydraulic mechanism is enclosed within outer tube lower end and is connected with anchor mechanism; Square hole is circumferentially laid in outer tube bottom, and lock dog is housed in square hole, in the inner groovy of the radially outstanding embedding hydraulic mechanism of lock dog; Below lock dog and in the periphery of central tube, offer circumferential recess, below circumferential recess, with shear pin, central tube and outer axial tube are upwards connected together.
2. double acting compression packer according to claim 1, is characterized in that, hydraulic mechanism comprises fluid cylinder, piston, lock ring and lock ring pressure cap; Piston bush is in fluid cylinder, and fluid cylinder and piston and outer tube form hydraulic cavities jointly; The position relative with hydraulic cavities perforate on outer tube and central tube communicates with hydraulic cavities; Piston periphery is in airtight and watertight padding groove to have locking screw, and lock ring is installed on locking screw periphery and is positioned at the groove of lock ring pressure cap, and lock ring pressure cap is connected with fluid cylinder.
3. double acting compression packer according to claim 2, is characterized in that, piston upper end endoporus is provided with inner groovy, and lock dog pressure cap is connected with piston and jointly forms inner groovy, and the lock dog ledge being installed on outer tube embeds inner groovy.
4. double acting compression packer according to claim 1, is characterized in that, anchor mechanism comprises upper cone, lower cone, slips, spring and slips cage; Upper cone and lower cone are arranged on the two ends up and down in slips cage, the interior step of slips cage blocks the outer step of upper cone and lower cone, slips is between upper cone and lower cone, and slip insert stretches out from inside to outside from the tapping of slips cage, and spring is diametrically between slips and slips cage.
5. according to the double acting compression packer described in the arbitrary claim of claim 1 to 4, it is characterized in that, central tube lower end is longer than outer tube lower end; Piston inner hole is shoulder hole, and its large diameter hole part coordinates with outer tube, and its small diameter bore part coordinates with central tube.
6. double acting compression packer according to claim 1, is characterized in that, central tube upper end is connected with top connection, and there is connecting thread piston lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469402.7U CN203420665U (en) | 2013-08-02 | 2013-08-02 | Double-acting compression type packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469402.7U CN203420665U (en) | 2013-08-02 | 2013-08-02 | Double-acting compression type packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203420665U true CN203420665U (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320469402.7U Withdrawn - After Issue CN203420665U (en) | 2013-08-02 | 2013-08-02 | Double-acting compression type packer |
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| CN (1) | CN203420665U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397863A (en) * | 2013-08-02 | 2013-11-20 | 中国石油化工股份有限公司 | Double-acting compression type packer and use method thereof |
| CN108825166A (en) * | 2018-05-30 | 2018-11-16 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of novel water injection packer |
| CN111894510A (en) * | 2020-08-18 | 2020-11-06 | 西南石油大学 | Combined rubber-cylinder type two-stage ultrahigh pressure sealing packer |
-
2013
- 2013-08-02 CN CN201320469402.7U patent/CN203420665U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397863A (en) * | 2013-08-02 | 2013-11-20 | 中国石油化工股份有限公司 | Double-acting compression type packer and use method thereof |
| CN103397863B (en) * | 2013-08-02 | 2015-11-18 | 中国石油化工股份有限公司 | Double acting compression packer and using method thereof |
| CN108825166A (en) * | 2018-05-30 | 2018-11-16 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of novel water injection packer |
| CN108825166B (en) * | 2018-05-30 | 2020-09-22 | 宝鸡瑞林石油机电设备有限责任公司 | Novel water injection packer |
| CN111894510A (en) * | 2020-08-18 | 2020-11-06 | 西南石油大学 | Combined rubber-cylinder type two-stage ultrahigh pressure sealing packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140205 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |