CN201486515U

CN201486515U - Switch type releasing packer

Info

Publication number: CN201486515U
Application number: CN2009201010113U
Authority: CN
Inventors: 鄂晓娟; 陈辉; 毛伟华; 赵齐禄
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2010-05-26
Anticipated expiration: 2019-09-25

Abstract

The utility model relates to a switch type releasing packer used underground in the field of petroleum extraction. The utility model mainly solves the problems of poor well control spray preventing performance and small inner passage of the traditional packer. The switch type releasing packer is characterized in that an inner hole of an upper joint is sequentially connected with a connecting head and a center pipe, and an outer sleeve is arranged on a gland shaft shoulder outside the connecting head, and the top end of the connecting head is provided with an upper press cap which is connected with the upper joint; a sheath with a release pin and a piston with a lock block are arranged in the connecting head and an annular cavity between the center pipe and the outer sleeve; the lower section of the piston is sequentially connected with a sheath in which a de-packing head is built and a gel cylinder upper press cap with a de-packing pin; a clamp spring sleeve arranged in an shell of the lower end of a seal gel cylinder is connected with a pin hook with a de-packing pin, and the pin hook is connected with an upper cone; a slip and a spring are arranged among the upper cone, a lower cone and a slip sleeve; and the lower cone is sequentially connected with a connecting body and a lower joint in which a well control switch is built. The switch type releasing packer has the well control and environmental protection function, can be matched with well measurement instrument and equipment and meets the functions of construction well magnetic positioning, packer seal verification, and the like.

Description

The switching regulator back-off packer

Technical field

The utility model relates to the used downhole tool in oil recovery field, specifically a kind of switching regulator back-off packer.

Background technology

Packer application is in the oil well down-hole, can realize layering extraction or water blockoff after the annular space of oil pipe and sleeve pipe is cut apart sealing, thereby realize the interlayer adjustment of oil reservoir.Now commonly used is the water plugging string that hangs the disintegration formula, and it is to utilize back-off packer water plugging string to be suspended on a kind of new method on oil well perforation well section top.At present, this kind has instruments such as 253-4,253-5, rail mounted back-off packer, bridging plug.Though above-mentioned instrument has the function that hangs tubing string,, it can not with the supporting use of disintegration formula water plugging string.Reason has 2 points, and the one, there are not well control, blowout prevention, environment-friendly function, influence construction, contaminated environment.The 2nd, the central passage of instrument less than normal can not with the supporting use of disintegration formula water-plugging technology tubing string, to realize the problem of testing the envelope data of magnetic orientation and admission down-hole.And water plugging string is in rountrip, because tubing string and the friction of casing wall and the decentraction of water plugging string and oil pipe and sleeve pipe have been quickened the wearing and tearing of water plugging string, makes packing element poorly sealed close and leak the bearing capacity and the application life of reduction water plugging string.

Summary of the invention

For sealing and the bearing capacity that improves packer, strengthen the internal channel of back-off packer, realize well control and environment-friendly function, the utility model provides a kind of switching regulator back-off packer.This back-off packer promptly has well control and environment-friendly function, and good seal performance is arranged again, and anchorage force is big, internal channel is big and characteristics such as long service life.

The technical solution of the utility model is: a kind of switching regulator back-off packer, comprise top connection and lower contact, described top connection endoporus successively with connector with and central tube be connected, be equipped with overcoat on the gland shaft shoulder of connector outer wall and its top is equipped with the upper pressing cap that is connected with top connection; Put the piston of with lock of sheath, the underlying of band release pin in the ring cavity of connector and central tube and outer inner room, piston connects the built-in sheath of end socket and the packing element upper pressing cap of band deblocking pin separated successively, separates the end socket endoporus and connects the position-limiting tube that is positioned at the packing element upper pressing cap; Packing element upper pressing cap underlying cartridge and shelves ring at interval are equipped with connector between cartridge and position-limiting tube; The shell of band jump ring cover in putting on the shaft shoulder of connector, the shell lower end connects outer connector, jump ring and claw is arranged in the ring cavity of jump ring cover and central tube, and the give up pin of pin of the bottom connecting band of jump ring cover is hung, and is connected upper cone between pin extension and outer connector; The outer shaft shoulder place of upper cone is equipped with the slip sleeve that the lower end is connected with pressure cap, and pressure cap is stuck on the step at lower cone middle part, and slip sleeve is built-in with slip insert up and down and the middle spring that cooperates with last lower cone; The lower end of lower cone connects connector and lower contact down successively; And the built-in well control switch of lower contact ring cavity; Described well control switch is connected down on the connector lower end by main body, and connects contiguous block by pin, and main body connects door-plate by contiguous block, torsion spring, bearing pin, dead bolt.

All be equipped with sealing ring between described sheath and connector and overcoat, piston and overcoat and central tube, shell and connector, pin extension and central tube and shell, lower cone and pin extension, following connector and lower contact; Described connector and central tube, piston lower end with the pawl cover, separate that end socket is hung with connector and pin with connector, upper cone with connector, shell with position-limiting tube, upper pressing cap, the lower end of lower cone is with lower contact and is threaded with following connector, time connector.

The beneficial effects of the utility model are: owing to take such scheme, it is descending that the deblocking head drives position-limiting tube, connector, claw, jump ring and packing element upper pressing cap under the effect of descent of piston power, packing element is compressed and makes its radial dilatation, reach packing sealing oil casing annular space, and the reverse pressure-bearing ability is strong, adapts to big pressure reduction working environment; It is descending that claw drives jump ring simultaneously, and be locked in the jump ring cover by the elastic energy of spring, thereby improve the purpose of anchorage force; Because the sealing circuit that central tube and pin are hung is arranged on pin hangs up, make the radial dimension of central tube reduce in addition, increased the internal channel of packer, satisfy the requirement that magnetic orientation and checking sealing of packer seal; Be provided with the well control switch in the lower contact, make it have well control, environment-friendly function, reach oilwell water shutoff operation overall process and realize not open flow construction of not kill-job.

Description of drawings

Accompanying drawing 1A is structural representation the first half of the present utility model;

Accompanying drawing 1B is structural representation the latter half of the present utility model.

1-top connection 2-connector 3-upper pressing cap 4-gland 5-overcoat 6-sheath 7-release pin 8-lock dog 9-piston 10-pawl cover 11-separates end socket 12-packing element upper pressing cap 13-deblocking pin 14-position-limiting tube 15-shelves ring 16-packing element 17-connector 18-jump ring 19-claw 20-central tube 21-shell 22-jump ring cover 23-pin and hangs the 24-connector 33-main body 34-contiguous block 35-bearing pin 36-torsion spring 37-dead bolt 38-door-plate 39-lower contact 40-screw 41-sealing ring 42-screw 43-radial hole 44-radial hole 45-pin 46-pin 47-pin 48-pin 49-sealing ring under the outer connector 26-upper cone 27-spring 28-slip insert 29-slip sleeve 30-pressure cap 31-lower cone 32-of pin 25-of giving up among the figure

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Shown in accompanying drawing 1, this switching regulator back-off packer comprises top connection 1 and lower contact 39, wherein top connection 1 internal thread connects connector 2, external screw thread connects upper pressing cap 3, and by screw 42 radial locations, the bottom inner hole thread of connector 2 connects the upper end of central tube 20, and gland 4 is threaded on the external diameter of connector 2, the shaft shoulder of gland 4 contacts with the shaft shoulder in the overcoat 5, and overcoat 5 tops contact with pressure cap 3; Put the sheath 6 of band release pin 7 in the ring cavity of overcoat 5 and connector 2 and central tube 20, the upper end of piston 9 is positioned in the sheath 6 by band release pin 7, the upper end that the lock dog 8 that the hypomere of connector 2 radially is provided with is through at piston 9 makes its axial location, and on connector 2 and the piston 9 radial hole 43 and 44 is arranged respectively; The lower end of the piston 9 pawl cover 10 that is threaded, pawl cover 10 is positioned at overcoat 5, its endoporus with cooperate with the end socket 11 of separating of piston 9 lower ends, separating has screw 45 and inner hole thread connecting ring to be placed in the position-limiting tube 14 of central tube 20 on the end socket 11; The lower thread of pawl cover 10 connects packing element upper pressing cap 12, has deblocking pin 13 on the packing element upper pressing cap 12; The lower end of packing element upper pressing cap 12 is buckled on the cartridge 16,16 at least 3 of packing elements, 16 of per two cartridge have shelves ring 15, following cartridge 16 contacts with shell 21, be equipped with position-limiting tube 14 and connector 17 between the ring cavity of cartridge 16 and central tube 20, and position-limiting tube 14 is positioned at the hole of connector 17; Shell 21 built-in jump ring covers 22, put jump ring 18 and claw 19, underlying pin in the ring cavity of jump ring cover 22 and central tube 20 and hang 23 and overlap 22 with jump ring and be threaded, pin is hung on 23 and is worn the pin 24 of giving up, and the sealing ring 49 that pin extension 23 and central tube are 20 is positioned at pin and hangs on the circuit of 23 outer walls, make the wall thickness of central tube 20 reduce accordingly, thereby enlarged the internal diameter size of central tube 20, and then strengthened test channel; Be threaded outer connector 25 and by screw 46 location of the lower end of shell 21, outer connector 25 epimere that is threaded is positioned at pin and hangs 23 and the upper cone 26 of 25 of outer connectors, and is located by pin 47; The conical section of upper cone 26 contacts with slip insert 28 with tapering, slip insert 28 is middle two up and down of putting spring 27, lower slips tooth 28 cooperates with the cone 31 of bottom, and last lower cone (26,31) conical section, spring 27 and two slip inserts 28 all are positioned at slip sleeve 29, slip sleeve 29 upper ends are stuck on the shaft shoulder of upper cone 26, be threaded pressure cap 30 and of lower end by screw 48 location, and pressure cap 30 is positioned on the step at lower cone 31 middle parts; The lower contact 39 that is threaded of the lower end of lower cone 31 connector 32 that is threaded down, following connector 32; And the ring cavity of lower contact 39 is built-in with by main body 33, contiguous block 34, screw 40, bearing pin 35, torsion spring 36, the well control switch that dead bolt 37 and door-plate 38 are formed, be connected with it with welding manner in the interior step of connector 32 lower ends under wherein main body 33 upper ends insert, contiguous block 34 is fixing by screw 40 with main body 33, contiguous block 34 is connected by bearing pin 35 and the energy axial rotation with dead bolt 37, dead bolt 37 is connected with door-plate 38 usefulness screws, torsion spring 36 is housed on the bearing pin 35, door-plate 38 fastens with main body 33 lower end shape of a saddle door mouths under the effect of torsion spring 36, reaches the effect of closing oil flow channel.In this packer, described sheath 6 and connector 2 and overcoat 5, piston 9 and overcoat 5 and central tube 20, shell 21 and connector 17, pin extension 23 and central tube 20 and shell 21, lower cone 31 and pin extension 23, following connector 32 and 39 of lower contacts all are equipped with sealing ring 41, form multiple-sealed.

During underground work, at first the switching regulator back-off packer is lowered into the oil well projected depth, in oil pipe, fills clear water then and suppress.Liquid is by the inlet opening (43 on connector 2 and the piston 9,44), enter into by connector 2, sheath 6, piston 9, overcoat 5, the plunger shaft that central tube 20 is formed, release pin 7 is cut off under the effect of fluid pressure, sheath 5 is up, lock dog 8 is because of losing the outer effect of supporting forfeiture locking workpiece, it is descending to promote piston 9 under the effect of fluid pressure, under the effect of piston 9 descending power, separate end socket 11 and drive position-limiting tube 14, connector 17, claw 19, jump ring 18 and packing element 16 upper pressing caps are descending, cartridge 16 is compressed and makes its radial dilatation, reaches the purpose of packing sealing oil casing annular space.Simultaneously, it is descending that claw 19 drives jump ring 18, and be locked in the jump ring cover 22 by the elastic force of spring 18, guarantees its sealing thereby reach the grappling packing element.Simultaneously, upper cone 26 and lower cone 31 strut slip insert 28 under the effect of axial force it are anchored on the internal surface of sleeve pipe, reach the give up effect of tubing string of grappling.When giving up, in oil pipe, suppress and the upper lifting pipe post, the pin 24 of giving up is cut off under the effect of hydraulic coupling and tubing string upper lifting force, top connection 1, connector 2, pressure cap 3, gland 4, overcoat 5, sheath 6, release pin 7, lock dog 8, piston 9, pawl cover 10 and central tube 20 trip out ground with the tubing string of giving up, finish the process of giving up of instrument, the internal channel of tubing string of giving up is simultaneously closed, after instrument is finished the process of giving up, central tube 20 is with mentioning on the tubing string of giving up, at this moment, the door-plate 38 of well control switch is because of losing the interior support of central tube 20, and door-plate then cuts out with main body 33 lower end shape of a saddle door mouths fastening under torsion spring 36 effects, cut off oil flow channel, reach the purpose of well control.When needing deblocking, be lowered to fishing tool, drag for the lower end of separating end socket 11, the upper lifting pipe post, the deblocking pin 13 of switching regulator back-off packer is cut off, and packing element deblocking instrument can trip out ground smoothly, finishes the deblocking process of instrument.

This switching regulator back-off packer has the well control environment-friendly function because structure is provided with rationally, and internal channel can satisfy magnetic orientation and the requirement of checking sealing of packer sealing test, the packing element good seal performance, high pressure resistant, slips anchoring power is big, easy deblocking, adapt to big pressure reduction working environment, long service life.

Claims

1. switching regulator back-off packer, comprise top connection (1) and lower contact (39), it is characterized in that: top connection (1) endoporus successively with connector (2) with and central tube (20) be connected, be equipped with overcoat (5) on gland (4) shaft shoulder of connector (2) outer wall and its top is equipped with the upper pressing cap (3) that is connected with top connection (1); Put the sheath (6) of band release pin (7), the piston (9) of underlying with lock (8) in the ring cavity between connector (2) and central tube (20) and overcoat (5), piston (9) connects the built-in sheath (10) of end socket (11) and the packing element upper pressing cap (12) of band deblocking pin (13) separated successively, separates end socket (11) endoporus and connects the position-limiting tube (14) that is positioned at packing element upper pressing cap (12); Packing element upper pressing cap (12) underlying cartridge (16) and shelves rings (15) at interval are equipped with connector (17) between cartridge (16) and position-limiting tube (14); The shell (21) of band jump ring cover (22) in putting on the shaft shoulder of connector (17), shell (21) lower end connects outer connector (25), on in the ring cavity of jump ring cover (22) and central tube (20) jump ring (18) and claw (19) are arranged, the give up pin of pin (24) of the bottom connecting band of jump ring cover (22) is hung (23), and pin is hung between (23) and outer connector (25) and is connected upper cone (26); The outer shaft shoulder place of upper cone (26) is equipped with the slip sleeve (29) that the lower end is connected with pressure cap (30), pressure cap (30) is stuck on the step at lower cone (31) middle part, and slip sleeve (29) is built-in with slip insert up and down (28) and the middle spring (27) that cooperates with last lower cone; The lower end of lower cone (31) connects connector (32) and lower contact (39) down successively; And the built-in well control switch of lower contact (39) ring cavity; Described well control switch is connected down on connector (32) lower end by main body (33), and connects contiguous block (34) by pin (40), and main body (33) connects door-plate (38) by contiguous block (34), torsion spring (36), bearing pin (35), dead bolt (37).

2. switching regulator back-off packer according to claim 1 is characterized in that: described sheath (6) and connector (2) and overcoat (5), piston (9) and overcoat (5) and central tube (20), shell (21) and connector (17), pin are hung between (23) and central tube (20) and shell (21), lower cone (31) and pin extension (23), following connector (32) and lower contact (39) and all are equipped with sealing ring (41).

3. switching regulator back-off packer according to claim 1 is characterized in that: described connector (2) and central tube (20), piston (9) lower end with pawl cover (10), separate end socket (11) and be with lower contact (39) and be threaded with following connector (32), time connector (32) with the lower end that connector (25) and pin are hung (23), lower cone (31) with connector (25), upper cone (26) with connector (17), shell (21) with position-limiting tube (14), upper pressing cap (12).