CN100580216C

CN100580216C - Anti-prop slips capable of dragging

Info

Publication number: CN100580216C
Application number: CN200710114632A
Authority: CN
Inventors: 杜国栋; 刘涛; 丁利霞; 吴孔香; 潘弛; 赵峰; 彭敏; 赵霞
Original assignee: 白霞
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2010-01-13
Anticipated expiration: 2027-11-16
Also published as: CN101173600A

Abstract

The invention provides a salvageable anti-locking slip. A cone descends and pushes the slip to spread out and is anchored on the casing. After the descending of the cone, the cone loses the control over the gate piece, which makes the upper body of the invention separate from the lower body. Because of the anchor separation with a pump, the upper and lower bodies of the invention are separated from the salvage string and are extracted upwards, then the sucker rod descends to produce, which makes the anti-locking string need not be extracted completely in order to lower the producing string with a pump. When the downhole tool of the lower body of the invention needs to be maintained, the producing string needs not to be completely extracted and descend the salvage string. But only the producing string is descended and the gate piece no longer stops the descending of the salvage string. When the screw thread of the lower part of the salvage string has contacted the screw thread of the inside of the cone. The screw thread of the rotary string coincides by rotation, and then the string is extracted upwards. While extracting upwards the cone, the slip is back from the casing. The string is extracted upwards continuously, so all the downhole tools can be extracted completely. The invention considerably reduces the working procedure, the working time and the working costs, and increases the economic benefits.

Description

Anti-prop slips capable of dragging

One, technical field

The present invention is the downhole tool that oil well is used, particularly a kind of anti-prop slips capable of dragging.

Two, background technology

Anti-jack slips is that packer set needed axial force in its underpart is fixed on a kind of downhole tool on the sleeve pipe, present anti-jack slips use is, with independent tubing string anti-jack slips is lowered to the oil reservoir position, the ground pitching is suppressed, anti-jack slips upper body and lower body are thrown off, trip out tubing string and anti-jack slips upper body then, descend pumping pipe string again.When needing the operation maintenance, propose pumping pipe string earlier, salvage the tubing string of anti-jack slips lower body down, the anti-jack slips lower body is pulled out.Therefore, operation was many when anti-jack slips used at present, and the work operations amount is big, and the activity duration is long, has reduced the working time of oil well.

Three, summary of the invention

The objective of the invention is to design a kind of anti-prop slips capable of dragging, when using it, throw off and pull out all and can finish, reduce flow chart by the pumping pipe string of itself.

The object of the present invention is achieved like this: comprise housing, slips, salvage pipe, lock dog cover, lock dog, cone, salvaging pipe inserts in the lock dog cover, salvaging pipe, lock dog cover are connected by lock dog, lock dog cover bottom connects with housing, and cone is in housing, and slips is installed in the window place of housing, the part of slips is on cone, and cone top endoporus surrounds lock dog.

Salvaging the pipe bottom has screw thread, and screw thread is arranged in the cone, salvages the pipe lower thread and is on the screw thread of cone, and both screw threads can be joined.

The invention has the beneficial effects as follows: salvage anti-top and finished by pumping pipe string, therefore, throwing off and pulling out does not need other lower tubular column, has reduced flow chart, reduces the activity duration, saves operating cost, increases economic efficiency.

Four, description of drawings

Accompanying drawing is an assembling drawing of the present invention.

Five, the specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are described.

Comprise housing salvaging pipe 1, lock dog cover 2, lock dog 3, housing 4, cone 5, slips 6, salvaging pipe 1 inserts in the lock dog cover 2, salvage pipe 1, lock dog cover 2 by lock dog 3 connections, lock dog overlaps 2 bottoms and connects with housing 4, cone 5 is in housing, slips 6 is installed in the window place of housing, and another part of slips 6 is on cone 5, and cone 5 top endoporus surround lock dog 3.Salvaging pipe 1 bottom has screw thread, in the cone 5 screw thread is arranged, and salvages pipe 1 lower thread and is on the screw thread of cone 5, and both screw threads can be joined.

Cone 5 by dowel fixes on housing, the pushing mechanism of in cone 5, packing into (pushing mechanism is a prior art, and mechanical type and fluid pressure type are arranged).During use, the present invention is connected under the oil well pump, on the packer, down behind design attitude, through rotation or suppress and make cone 5 descending, promote slips 6 and outwards open and be anchored on the sleeve pipe, because the conical surface of cone 5 is less than from the locking angle, slips is pinned, and therefore, slips 6 is to being anchored on the sleeve pipe all the time.After cone 5 was descending, cone 5 top endoporus no longer surrounded lock dog 3, lose the constraint to lock dog 3, and lock dog 3 can outwards move, and lock dog 3 loses salvaging the locking action of pipe 1, and upper body of the present invention and lower body are thrown off, and salvaged pipe 1 and can upwards extract out.Owing to be that the grappling finished of band pump is thrown off, therefore, upper body of the present invention and lower body being thrown off salvage pipe 1 upwards to extract the back out just can lower sucker rod production, does not need to beat the flow string of preventing playing again after the tubing string that pushes up all trips out the band pump.

When needing the downhole tool of maintenance bottom of the present invention, do not need flow string is all proposed to descend fishing string again, only need flow string to be transferred again, lock dog 3 stops that no longer salvaging pipe 1 is descending, after making it salvage pipe 1 lower thread and cone 5 internal whorls contact, the rotation tubing string, screw thread screws, and screws back upper lifting pipe post, to carry on the cone 5, slips 6 is just regained from casing wall, continues the upper lifting pipe post, whole downhole tools can be proposed.Significantly reduce flow chart.

Lock dog can substitute with steel ball.

Claims

1, a kind of anti-prop slips capable of dragging, housing (4), slips (6) are arranged, it is characterized in that: also comprise and salvage pipe (1), lock dog cover (2), lock dog (3), cone (5), salvaging pipe (1) inserts in the lock dog cover (2), salvaging pipe (1), lock dog cover (2) are connected by lock dog (3), lock dog cover (2) bottom connects with housing (4), cone (5) is in housing, slips (6) is installed in the window place of housing (4), the part of slips (6) is on cone (5), and cone (5) top endoporus surrounds lock dog (3).

2, according to the described anti-prop slips capable of dragging of claim 1, it is characterized in that: salvaging pipe (1) bottom has screw thread, and cone has screw thread in (5), salvages pipe (1) lower thread and is on the screw thread of cone (5), and both screw threads can be joined.