CN201386524Y

CN201386524Y - Special fishing tool for packer rubber

Info

Publication number: CN201386524Y
Application number: CN200920022182U
Authority: CN
Inventors: 杨茂元; 陈广兵; 王军辉; 刘斌斌; 贾月雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-22
Filing date: 2009-02-22
Publication date: 2010-01-20
Anticipated expiration: 2019-02-22

Abstract

The utility model provides a special fishing tool for a packer rubber, belonging to an oil field production device. The special fishing tool is provided with a joint; the upper end of a fishing barrel is fixed on the joint; the inner wall of the lower end of the fishing barrel is of the tapered surface, and saw-tooth shaped screw thread is arranged on the inner wall of the fishing barrel on the tapered surface; the upper end of a prong grab barrel in the fishing barrel is fixed on the joint with an upper tapered end and a lower tapered end; the lower part of the prong grab barrel is articulated with a pair of spear claws; a spring is arranged between the spear claws; and holes are arranged on the prong grab barrel corresponding to the spear claws. The special fishing tool has simple and reasonable structure, can clamp the packer rubber reliably by adopting the saw-tooth shaped screw thread, the spear claws and the like, has good fishing effect and high fishing success rate, shortens the fishing time and lowering the fishing cost.

Description

The special-purpose fisher of packer rubber

Technical field

The utility model provides a kind of field produces device, especially a kind of fisher.

Background technology

In oilfield downhole operation was produced, the problem of the remaining packer rubber in shaft bottom appearred through regular meeting.Present Refloatation method is to utilize the instrument of a kind of being called " one pawl " to salvage, and this instrument is made up of top connection and salvaging cylindrical shell, salvages weak effect, often occurs salvaging and fails.Or utilize junk mill to carry out milling, because of rubber is softer, the milling effect is relatively poor, can only take to pause repeatedly pound, process of washing goes out rubber, long construction period, operating cost height, junk mill are stuck easily, bring bigger problem.

Summary of the invention

Problem to be solved in the utility model is to provide a kind of packer rubber special-purpose fisher, to improve the salvaging effect.

The utility model is to realize like this, the special-purpose fisher of packer rubber, it has joint, the fishing socket upper end is fixed on the joint, and fishing socket lower end inwall is a taper surface, on the fishing socket inwall above the taper surface zigzag screw thread is arranged, dragging for lance tube upper end in the fishing socket, to be fixed on the joint upper and lower end be conical head, in drag for lance tube bottom and be hinged with a pair of lance pawl by hinge, between the lance pawl spring is arranged, in the position corresponding to the lance pawl of dragging on the lance tube porose.

Adopt the fisher of said structure, simple and reasonable for structure, can utilize zigzag screw thread and lance pawl etc. reliably packer rubber to be blocked, to salvage effectively, the success rate height of salvaging has shortened the salvaging time, has reduced the salvaging cost.

Description of drawings

Fig. 1 is the schematic diagram of the utility model structure.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model and operating principle.

As shown in drawings, the special-purpose fisher of the packer rubber of the utility model, it has joint 1, fishing socket 3 upper ends are fixed on the joint, and fishing socket lower end inwall is a taper surface 12, on the fishing socket inwall above the taper surface zigzag screw thread 10 are arranged, dragging for lance tube 2 upper ends in the fishing socket, to be fixed on the joint upper and lower end be conical head 11, in drag for lance tube bottom and be hinged with a pair of lance pawl 5 by hinge 7, spring 4 is arranged between the lance pawl, in drag for the position corresponding to the lance pawl porose 6 on the lance tube.

During use, utilize the external screw thread on joint top that itself and fishing string are installed together.This fisher enters the down-hole with fishing string.When touching packer rubber, slight pressurization is also slowly rotated fishing string, and rubber is entered in the fishing socket.Cylindrical because of rubber, therefore, under interior guiding of dragging for lance tube tapered lower end, in entering, drags for by rubber in the annular space between lance tube and the fishing socket.Be rotated further fishing string, rubber continues uply under the effect of zigzag screw thread and pressure, and the elastic force that overcomes spring surrounds lance pawl outside.After rubber enters in the fishing socket fully, on carry fishing string, the lance pawl opens under the cross component force effect of lifting force and thrusts rubber, under the acting in conjunction of zigzag screw thread, rubber is firmly blocked, and mentions abovegroundly with fishing string, finishes salvaging.

Obviously, the sawtooth of zigzag screw thread should be inclined upwardly, and the rotation direction of screw thread should with the direction of rotation of fishing string, be generally counterclockwise rotation direction.

Another can also be arranged to lance pawl 8 below a pair of lance pawl 5, this a pair of lance pawl drags on the lance tube in being installed in by another hinge 9, and between this a pair of lance pawl spring is arranged also.Can be orthogonal between two pairs of lance pawls.Adopt two pairs of lance pawls can improve the reliability of this fisher work.

Claims

1, the special-purpose fisher of packer rubber, it is characterized in that, it has joint (1), fishing socket (3) upper end is fixed on the joint, fishing socket lower end inwall is taper surface (12), zigzag screw thread (10) is arranged on the fishing socket inwall above the taper surface, dragging for lance tube (2) upper end in the fishing socket, to be fixed on the joint upper and lower end be conical head (11), in drag for lance tube bottom and be hinged with a pair of lance pawl (5) by hinge (7), spring (4) is arranged between the lance pawl, in drag for the position corresponding to the lance pawl porose (6) on the lance tube.