CN2256931Y - Bridging plug capable of fishing - Google Patents

Abstract

The utility model belongs to an oil extraction tool. The utility model comprises a core pipe, wherein the core pipe is orderly connected with a recovery head, a glue barrel seat, a left cone and a right cone by a spring clamp; a glue barrel is arranged between the glue barrel seat and the left cone; an external lock block, an internal lock block and a clamp block are arranged on the glue barrel between the spring clamp and the left cone; a clamping tile is arranged between the left cone and the right cone; the right end of the spring clamp is provided with a blocking table, and blocking tables are respectively arranged by corresponding to the blocking table of the spring clamp and a core tube of the recovery head outside. The utility model has the characteristic of easy disassembly.

Description

Retrievable bridge plug

The utility model is to belong to oil tool.

The bridging plug that uses both at home and abroad is a drillable cast iron bridging plug at present, during use is by seat envelope instrument bridging plug to be delivered to the position that the down-hole is set by operating line; In pipeline, inject highly pressurised liquid by ground again, the cone that makes the overcoat on the envelope instrument move down and promote on the bridging plug moves, make the slips that is contained on the cone snap in tubing wall, make the packing element compression simultaneously, when reaching setting pressure, seat envelope instrument is just thrown off with bridging plug, and this moment, bridging plug upper and lower end liquid was by packing.Its major defect is when bridging plug need be removed, and must use drill bit bridging plug to be bored (approximately needing week age), and its process cycle is long, and must be equipped with drilling equipment.

The purpose of this utility model is exactly at the problems referred to above, and a kind of simple to operate, bridging plug of being easy to dismantle is provided.

The purpose of this utility model is achieved in that the utility model comprises the core pipe, the core pipe reclaims head together successively by Spring Card, glue tube base, left side cone, right cone is connected, glue tube base is with having packing element between the left cone, has outer lock dog on the glue tube base between Spring Card and the left cone, interior lock dog, fixture block, left side cone, between the right cone is slips, the left side of Spring Card, right-hand member has left side projection respectively, right projection, the recovery head inboard of corresponding left side projection, the core pipe outside has groove respectively, has groove in the right cone of corresponding right projection, the right-hand member of Spring Card has the retaining platform, corresponding to the retaining platform of Spring Card, the core pipe that reclaims head has the retaining platform outward respectively.

Major advantage of the present utility model:

Be provided with outer lock dog, interior lock dog, fixture block owing to mainly be provided with recovery head and glue tube base, operating line just can be very fast with bridging plug and tube wall disengagement by reclaiming head, and bridging plug mentioned on the ground, its operation tool is simple, shorten (only needing 8～10 hours) duty cycle greatly, and need not be equipped with drilling equipment.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structure for amplifying schematic diagram of outer lock dog;

Fig. 3 is the A-A sectional drawing of Fig. 2;

Fig. 4 is the structure for amplifying schematic diagram of interior lock dog;

Fig. 5 is the B-B sectional drawing of Fig. 4;

Fig. 6 is the structure for amplifying schematic diagram of fixture block;

Fig. 7 is the C-C sectional drawing of Fig. 6.

Below in conjunction with accompanying drawing concrete structure of the present utility model is described further:

The utility model comprises core pipe 1, core pipe 1 by Spring Card 9 successively with reclaiming 22,glue tube base 17,left side cone 11, right cone 6 is connected,glue tube base 17 is with havingpacking element 16 between theleft cone 11, hasouter lock dog 14 on theglue tube base 17 between Spring Card 9 and theleft cone 11,interior lock dog 13,fixture block 12,left side cone 11, between the right cone 6 isslips 10, the left side of Spring Card 9, right-hand member hasleft side projection 20 respectively, right projection 4,recovery 22 inboard of correspondingleft side projection 20, core pipe 1 outside hasgroove 18 respectively,groove 19, hasgroove 5 in the right cone 6 of corresponding right projection 4, the right-hand member of Spring Card 9 has retainingplatform 2, corresponding to theretaining platform 2 of Spring Card 9, reclaim that a core pipe of 22 1 is outer to have retaining platform 3 respectively, retainingplatform 23.

22 easy to connect for the recovery instrument with reclaiming, can be provided withbarb groove 21 in an end of reclaiming 22.

Right cone 6 can be connected by the gathering sill 7 of dog screw 8 withleft cone 11.

Convenient for manufacture craft, can betweenpacking element 16 andleft cone 11, be provided withpacking ring 15.

Narrate an actuation cycle process of the present utility model below:

Core pipe 1 of the present utility model is fixed in breaking on the device of an envelope instrument, to the desired location of down-hole, injects highly pressurised liquid to seat envelope instrument then down, and the overcoat promotionglue tube base 17 of a piston of envelope instrument is moved to right;Glue tube base 17 makesouter lock dog 14, wheninterior lock dog 13 moves to right, also forcingpacking element 16 to promoteleft cone 11 moves to right, under the mutual extruding ofglue tube base 17 andleft cone 11,left cone 11 and right cone 6,packing element 16,slips 10 are shifted to tubing wall, when being extruded power, packingelement 16 reaches when setting value, break device and disconnect, bridging plug of the present utility model is thrown off; The reaction force ofpacking element 16 moves to left thefixture block 12 in theglue tube base 17, andfixture block 12 will be wedged betweenouter lock dog 14, theinterior lock dog 13,glue tube base 17 is fixed, and keeps the state ofpacking element 16 no longer to change; Be that bridging plug of the present utility model enters duty.

When needs are removed the utility model bridging plug, make operating line andreclaim 22 and be connected, reclaiming 22 moves to left to core pipe 1retaining platform 23, core pipe 1 is forced to continue to move to left, Spring Card 9leaves groove 19,groove 5, the retaining platform 3 of core pipe 1 moves to left by the retainingplatform 2 drive Spring Cards 9 of Spring Card 9, the left end of Spring Card 9 enters and reclaims in 22groove 18,lock dog 13 moved to left in Spring Card 9 drove simultaneously,interior lock dog 13 drivesglue tube base 17 and moves to left, this moment,packing element 16,slips 10 were released, and bridging plug also is brought on the ground thereupon.

Claims (3)

1, retrievable bridge plug comprises core pipe (1), it is characterized in that core pipe (1) reclaims head (22) together successively by Spring Card (9), glue tube base (17), left side cone (11), right cone (6) is connected, glue tube base (17) is with having packing element (16) between the left cone (11), has outer lock dog (14) on the glue tube base (17) between Spring Card (9) and the left cone (11), interior lock dog (13), fixture block (12), left side cone (11), between the right cone (6) is slips (10), the left side of Spring Card (9), right-hand member has left side projection (20) respectively, right projection (4), recovery head (22) inboard of corresponding left side projection (20), core pipe (1) outside has groove (18) respectively, groove (19), has groove (5) in the right cone (6) of corresponding right projection (4), the right-hand member of Spring Card (9) has retaining platform (2), corresponding to the retaining platform (2) of Spring Card (9), has retaining platform (3) outside the core pipe (1) of recovery head (22) respectively, retaining platform (23).

2, retrievable bridge plug according to claim 1 is characterized in that right cone (6) is connected by the gathering sill (7) of dog screw (8) with left cone (11).

3, retrievable bridge plug according to claim 1 is characterized in that being provided with packing ring (15) between packing element (16) and the left cone (11).

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