CN201080808Y

CN201080808Y - Lifting and hanging type oil drainage device

Info

Publication number: CN201080808Y
Application number: CNU2007200896024U
Authority: CN
Inventors: 龚阳成; 龚家勇; 毕生; 邱坤态; 邱杰; 戴达山; 龚家荣; 孙为民; 李江浩; 屈玉成; 伍祖德; 罗井泉; 周建生; 彭森; 屈玉斌; 董科武; 刘青松; 陈明; 王德仁; 韩安平
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-27
Filing date: 2007-02-27
Publication date: 2008-07-02
Anticipated expiration: 2017-02-27

Abstract

The utility model relates to a subsurface tool for oil well operation in oilfield, in particular to a lift type oil drain device, which comprises an upper joint, an oil drain tube, a central tube, an oil drain pin, and a lower joint that are connected in sequence, the upper joint and the oil drain tube are connected together by an oil tube clasp, the upper part of the central tube is embedded inside the upper joint, the lower part of the central tube is connected with the lower joint, the oil drain pin is arranged at lower part of the oil drain tube, the root of the oil drain pin is arranged in the corresponding annular groove of the central tube, the oil drain tube and the central tube are positioned by the oil drain pin, two oil drain holes are symmetrically arranged below the oil drain tube; two long axial grooves are symmetrically arranged in inner cavity at lower part of the upper joint; two clawing sheets are symmetrically in the cavity at upper part of the central tube. The device is applied for oil well with Y221 or Y211 packer depending on tube string load setting sealing, the utility model is assembled above the oil pump, after tube string is in position, the tube string setting sealing Y221 packer is lifted and rotated upwards for release and the tube string setting sealing Y211packer is lifted and rotated upwards for release, the oil drain pin is not cut down, so as to ensure sealing performance of produced tube string .

Description

A kind of hanging drainage device

One, technical field

The utility model relates to a kind of downhole tool that is used for the oilfield operation, particularly a kind of hanging drainage device.

Two, background technology

In the oil field development manufacturing process, more and more higher to environmental protection requirement at present, except that situations such as bottom tubing string leakage, most of oil wells all have been full of fluid in the tubing string when operation, oil pipe of every dismounting, just there is a large amount of fluid to splash everywhere, part fluid enters the oil jacket annular space, most of fluid flows into ground, well site, not only caused the crude oil loss, increased the sewerage treatment expense, but also polluted environment, made Job Operations place environment abominable, increase operator's difficulty of construction and unsafe factor, also increased expenses of environmental protection simultaneously.

" the autocontrol bleeder " that once used in the oil field, " ball control formula bleeder " are installed on the above appropriate location of oil well pump, the ram that dependence is connected on the sucker rod opens or cuts out the draining hole to the friction of sliding sleeve, often occur improperly opening, situation such as seal failure, use has been eliminated.And be installed on below the oil well pump pump barrel, the oil drainer arranged below pump of the above position of standing valve since the draining pin of weak link easily in process of production because fatigue fracture appears in pressure, the fluctuation of liquid stream, and in rod parting, well dirt when deposition, all can't open the draining passage, so this kind bleeder also seldom uses by the mode of throwing in the trip rod bump.

Three, summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and the hanging drainage device of a kind of simple in structure, reliable operation, stable performance is provided, and can open the draining passage when oil well operation lift pipe string, and the fluid in the tubing string is banished in pit shaft.

The purpose of this utility model is achieved in that a kind of hanging drainage device, comprise the top connection, drain mast, central tube, draining pin, the lower contact that are linked in sequence, top connection and outer tube link together, the central tube upper part is embedded in top connection inside, lower part is connected with lower contact, the draining pin is installed on the outer tube bottom, and root is seated in the cannelure of central tube corresponding position, by the draining pin outer tube and central tube is positioned.

Described drain mast middle and lower part is symmetrically distributed with two draining holes.

Described top connection lower part inner chamber is symmetrically distributed with the axial elongated slot of twice.

Described central tube upper part chamber is symmetrically distributed with two calvus, can transfer torque after inlaying by the axial elongated slot of twice of itself and top connection.

Two calvus upper surfaces of described central tube and root end face do not contact with the corresponding end face of top connection in normal productive process and keep enough distances.

Described drain mast lower surface does not contact with the lower contact upper surface in normal productive process and keeps enough distances.

Described central tube can produce relative motion flexibly with drain mast after four draining pins are cut off, when its top ledge leave from office terrace and outer tube bore are appeared on the stage after terrace contacts, two draining holes on the drain mast surpass two calvus root end faces, inside and outside connection fully.

The beneficial effect that adopts the utility model to bring: adopt the hanging drainage device to be applied to be with the Y221 packer, Y211 packers etc. rely on the tubing string load to realize the oil well of the employing band envelope mode of production of seat envelope, it is installed on the above position of oil well pump, in the lower tubular column process, prevent to impact energetically, need rotate tubing string when having descended tubing string seat envelope Y221 packer, this moment is because the central tube of hanging drainage device and the tessellation of top connection, can transfer torque, if seat envelope Y211 packer, then do not need to rotate tubing string, transfer the tubing string certain load, Y221 packer or Y211 packer are able to the seat envelope, this moment, four draining pins can not cut off, in normal productive process, four draining pins also are in the state do not cut off, can guarantee that relative motion does not take place for drain mast and central tube, thereby guarantee the sealing that flow string is inside and outside.

In the operation lift pipe string; at first upper lifting pipe post certain load relief Y221 packer or Y211 packer deblocking; trip out and allow Y221 packer or Y211 packer set behind the oil pipe again; the seat envelope load that the tubing string load surpasses packer is transferred in requirement; reach four draining pins cut off load after; four draining pins are cut off simultaneously; go up the upper lifting pipe post then; the central tube of hanging drainage device and drain mast produce relative motion; two draining holes on the drain mast are being communicated with inside and outside the tubing string; the liquid that is higher than the oil jacket annulus liquid level in the tubing string enters the oil jacket annular space through the draining hole; just can trip out tubing string in the well by normal running technology; fluid then can not taken out of ground by earial drainage all the time in pit shaft; not only protected environment to reduce expenses of environmental protection; but also improved the field operation condition, avoid crude oil to overflow the loss that cause on ground simultaneously.

The hanging drainage device is simple in structure, principle is feasible, reliable operation, stable performance, in the time of can satisfying the pumpingh well operation pipe column oil drainage with the protection environment, reduce the loss, improve multiple needs such as operating condition.

Four, description of drawings

Fig. 1, Fig. 2, Fig. 3, Fig. 4 are structural representations of the present utility model.

Five, the specific embodiment

Below in conjunction with accompanying drawing enforcement of the present utility model is described.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the utility model comprises top connection (1), central tube (4), drain mast (5), draining pin (6), the lower contact (8) that is linked in sequence, top connection (1) links together by tubing thread with drain mast (5), central tube (4) upper part is embedded in top connection (1) inside, lower part is connected with lower contact (8), draining pin (6) is installed on drain mast (5) bottom, root is seated in the cannelure of central tube (4) corresponding position, by draining pin (6) drain mast and central tube (4) is positioned.

Described drain mast (5) middle and lower part is symmetrically distributed with two draining holes.

Described top connection (1) lower part inner chamber is symmetrically distributed with the axial elongated slot of twice.

Described central tube (4) upper part chamber is symmetrically distributed with two calvus, can transfer torque after inlaying by the axial elongated slot of twice of itself and top connection (1).

Two calvus upper surfaces of described central tube (4) and root end face do not contact with the corresponding end face of top connection (1) in normal productive process and keep enough distances.

Described drain mast (5) lower surface does not contact with lower contact (8) upper surface in normal productive process and keeps enough distances.

Described central tube (4) after four draining pins (6) are cut off can and drain mast (5) produce relative motion flexibly, when its top ledge leave from office terrace and drain mast (5) inner chamber are appeared on the stage after terrace contacts, two draining holes on the drain mast (5) surpass two calvus root end faces, inside and outside connection fully.

Adopt the hanging drainage device to be applied to be with the Y221 packer, Y211 packers etc. rely on the tubing string load to realize the oil well of the employing band envelope mode of production of seat envelope, it is installed on the above position of oil well pump, in the lower tubular column process, prevent to impact energetically, need rotate tubing string when having descended tubing string seat envelope Y221 packer, this moment is because the central tube of hanging drainage device and the tessellation of top connection, can transfer torque, if seat envelope Y211 packer, then do not need to rotate tubing string, transfer the tubing string certain load, Y221 packer or Y211 packer are able to the seat envelope, this moment, four draining pins can not cut off, and in normal productive process, four draining pins also are in the state do not cut off, can guarantee that relative motion does not take place for drain mast and central tube, thereby guarantee the sealing that flow string is inside and outside.

Claims

1. hanging drainage device, comprise the top connection (1), central tube (4), drain mast (5), draining pin (6), the lower contact (8) that are linked in sequence, top connection (1) links together by tubing thread with drain mast (5), central tube (4) upper part is embedded in top connection (1) inside, lower part is connected with lower contact (8), draining pin (6) is installed on drain mast (5) bottom, root is seated in the cannelure of central tube (4) corresponding position, by draining pin (6) drain mast and central tube (4) are positioned, it is characterized in that:

A, drain mast (5) middle and lower part are symmetrically distributed with two draining holes;

B, top connection (1) lower part inner chamber are symmetrically distributed with the axial elongated slot of twice;

C, central tube (4) upper part chamber are symmetrically distributed with two calvus, can transfer torque after inlaying by the axial elongated slot of twice of itself and top connection (1);

Two calvus upper surfaces of D, central tube (4) and root end face do not contact with the corresponding end face of top connection (1) in normal productive process and keep enough distances;

E, drain mast (5) lower surface do not contact with lower contact (8) upper surface in normal productive process and keep enough distances;

F, central tube (4) after four draining pins (6) are cut off can and drain mast (5) produce relative motion flexibly, when its top ledge leave from office terrace and drain mast (5) inner chamber are appeared on the stage after terrace contacts, two draining holes on the drain mast (5) surpass two calvus root end faces, inside and outside connection fully.

2. a kind of hanging drainage device according to claim 1 is characterized in that: central tube (4) is inlayed transfer torque with top connection (1) mutually by two calvus and two elongated slots.

3. a kind of hanging drainage device according to claim 1 is characterized in that: do not cut off all the time in four draining pins (6) present envelope Y221 packer or Y211 packer and the normal productive process.

4. according to claim 1,2 or 3 described a kind of hanging drainage devices, it is characterized in that: central tube (4) after four draining pins (6) are cut off can and drain mast (5) produce relative motion flexibly, when its top ledge leave from office terrace and drain mast (5) inner chamber are appeared on the stage after terrace contacts, two calvus root end faces of central tube (4) are a little less than two draining hole sites of hanging drainage device, inside and outside be communicated with fully.