CN201507277U

CN201507277U - Blowout prevention pressure testing and oil drain switch

Info

Publication number: CN201507277U
Application number: CN2009201009421U
Authority: CN
Inventors: 杨军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-16
Filing date: 2009-09-16
Publication date: 2010-06-16
Anticipated expiration: 2019-09-16

Abstract

The utility model discloses a blowout prevention pressure testing and oil drain switch. The switch comprises a main body (1), an upper ball seat (2). a ball (3), a lower ball seat (4), a bracket (5), a slideway rack (6), springs (7) and a lower joint (8), wherein the upper ball seat (2) is provided with a hole formed at the center thereof and a tapered end opening and positioned at the internal upper part of the main body (1); the lower ball seat (4) is provided with a tapered upper opening and a hollow bracket (5) mounted therein, the bracket (5) is provided with a perforated upper part and a projection (9) arranged at the bottom thereof; a groove slideway (10) is arrranged on the inner wall of the slideway rack (6); the springs (7) are mounted in the bracket (5) and the lower joint (8); the ball (3) is placed between the upper ball seat (2) and the lower ball seat (4); and the main body (1) and the lower joint (8) are in threaded connection. The switch with excellent air-tightness has the functions of blowout prevention, pressure test and oil drain, can effectively prevent blowout when a completion string is raised in the second construction operation, thereby solving the problem that the prior tool cannot control blowout in the second construction operation of the completion string in a sucker rod pump well.

Description

Blowout prevention pressure testing draining switch

One, technical field

The utility model relates to the oilfield downhole operation instrument, specifically is a kind of blowout prevention pressure testing draining switch.

Two, background technology

In the oilfield downhole operation construction, play, often occur during lower tubular column well kick and blowout phenomenon, in order to control well kick, blowout when the construction operation effectively, blowout prevention pressure testing draining switch is installed when the completion tubular column of insert pump down-hole, prevent blowout, whether the bearing capacity of pressure testing checking tubing string trips out former well casing post according to the sealing situation decision of tubing string.The blowout prevention pressure testing draining switch that uses has only a lower ball base at present, when ball is descending carry out pressure testing after, ball and valve cover break away from, the valve cover is a disk with holes, when subjob again plays completion tubular column and blowout occurs, valve cover and ball can't be realized sealing, so this blowout prevention pressure testing draining switch can't prevent the blowout that occurs when subjob plays completion tubular column again in actual use.

Three, summary of the invention

The purpose of this utility model is to provide a kind of blowout prevention pressure testing draining switch at the problems referred to above, solve rod-type pump sump completion tubular column once more in the construction operation the active tool can't effectively control the problem of blowout.

The utility model is achieved through the following technical solutions: this blowout prevention pressure testing draining switch is made of main body, upper ball base, ball, lower ball base, support, slideway shelf, spring, lower contact, and the upper ball base center is porose, end opening is taper, is positioned at the main body internal upper part; Lower ball base suitable for reading for taper, in adorn support hollow and that top is with holes, projection is arranged at the bottom; The fluted slideway of the inwall of slideway shelf; In support and the lower contact spring is housed, ball places between upper ball base and the lower ball base, and main body and lower contact are threaded.

The good effect that the utility model has compared with the prior art: the utility model good airproof performance, have blowout prevention, pressure testing and oil draining function, can when construction operation plays completion tubular column once more, effectively prevent blowout.

Four, description of drawings

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

Fig. 2 is the structural representation of the utility model medium-height trestle;

Fig. 3 is the utility model middle slideway frame interior wall construction expanded view.

Among the figure: 1 main body, 2 upper ball bases, 3 balls, 4 lower ball bases, 5 supports, 6 slideway shelfs, 7 springs, 8 lower contacts, 9 projections, 10 groove slideways.

Five, the specific embodiment

The utility model is described in further detail in conjunction with the accompanying drawings: Fig. 1 is a structural representation of the present utility model, as shown in the figure, is made of main body 1, upper ball base 2, ball 3, lower ball base 4, support 5, slideway shelf 6, spring 7, lower contact 8.Upper ball base 2 centers are porose, end opening is taper.Upper ball base 2 is positioned at the internal upper part of main body 1, is contained in the bottom of main body 1 thread, and is used for blowout prevention after ball 3 contacts.Lower ball base 4 suitable for reading for taper, in adorn support 5 hollow and that top is with holes, in support 5 and the lower contact 8 spring 7 is housed.Fig. 2 is the structural representation of the utility model medium-height trestle, and as shown in the figure, support 5 is the porose hollow cylinder in top, and equally distributed projection 9 is circumferentially arranged at the bottom.Fig. 3 is the utility model middle slideway frame interior wall construction expanded view, and as shown in the figure, the inwall of slideway shelf 6 circumferentially has equally distributed groove slideway 10.Projection 9 correspondences of support 5 bottoms are contained in the groove slideway 10 of slideway shelf 6, and slide in the groove slideway 10 of slideway shelf 6.

During installation, ball 3 places between upper ball base 2 and the lower ball base 4, and projection 9 correspondences of support 5 are contained in the groove inner slide 10 of slideway shelf 6, and main body 1 and lower contact 8 are threaded.Under the normal pressure, the centre bore of upper ball base 2, the hole on support 5 tops, the centre bore of support 5 constitute oil-feed or draining passage.During pressure testing, spring 7 is stressed, and support 5 is descending, and ball 3 closely contacts with lower ball base 4, the sealing when realizing pressure testing.

During use, blowout prevention pressure testing draining switch is connected the bottom of oil pipe tubing string, i.e. position between insert pump outer working tube and the screen casing.Ball 3 in the blowout prevention pressure testing draining switch and upper ball base 2 are gone into the well with completion tubular column being under the state of sealing, occur blowout when preventing first operation.

After the completion, tubing string is carried out pressure testing, spring 7 is stressed, and support 5 is descending, and ball 3 breaks away from upper ball base 2, and by the centre bore of upper ball base 2, the hole on support 5 tops, the centre bore of support 5 constitute oil-feed or the draining passage is opened, and oil well enters work under normal pressure.

Carry out pressure testing before construction operation plays completion tubular column once more earlier, after pressure testing finished, support 5 was subjected to spring 7 effects up, and ball 3 is back into upper ball base 2 places.Because ball 3 is that sphere contacts with the conical surface with the lower pyramid mouth of upper ball base 2, has effectively stopped the liquid by support 5 ejections suitable for reading, prevents blowout once more.

Claims

1. blowout prevention pressure testing draining switch, it is characterized in that: this blowout prevention pressure testing draining switch is made of main body (1), upper ball base (2), ball (3), lower ball base (4), support (5), slideway shelf (6), spring (7), lower contact (8), upper ball base (2) center is porose, end opening is taper, is positioned at main body (1) internal upper part; Lower ball base (4) suitable for reading for taper, in adorn support (5) hollow and that top is with holes, projection is arranged at the bottom (9); The fluted slideway of inwall (10) of slideway shelf (6); In support (5) and the lower contact (8) spring (7) is housed, ball (3) places between upper ball base (2) and the lower ball base (4), and main body (1) and lower contact (8) are threaded.

2. blowout prevention pressure testing draining switch according to claim 1 is characterized in that: the projection (9) of support (5) bottom is along circumferentially evenly distributing.

3. blowout prevention pressure testing draining switch according to claim 1 is characterized in that: the groove slideway (10) of slideway shelf (6) inwall is along circumferentially evenly distributing.