CN201116457Y

CN201116457Y - Combined type overshot

Info

Publication number: CN201116457Y
Application number: CNU200720016331XU
Authority: CN
Inventors: 管恩东; 徐宏权; 张勇; 王福胜; 李洪旭; 何建忠; 沈艳丽; 杨宏伟
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-09-17
Anticipated expiration: 2017-11-30

Abstract

Disclosed is a novel combined overshot for fishing in oil field well workover operation, which comprises an upper joint, an upper overshot body, a spring base, a spring, a small slip, a lower overshot body and a large slip. The upper portion of the upper joint is in threaded connection with a sucker rod, the lower portion of the upper joint is in threaded connection with the upper overshot body, a small through hole is arranged in the upper overshot body, the lower portion of the upper overshot body is equipped with an inner cone, the upper overshot body and the lower overshot body are in threaded connection, the spring base is seated in the spring and can slide in the upper overshot body, the small slip is pressed by the spring, grabbing thread teeth are arranged in the small slip, a spiral spring with a rectangular section is installed at the upper section inside the lower overshot body, an inner cone is arranged at the middle section, a guide shoe is arranged at the lower section, and grabbing thread teeth are arranged in the large slip. The overshot solves problem that fishing tools are single in the prior art, and just can aim at one fishing inside sleeve pipes or pipe columns with different diameters, different broken positions and different sizes, thereby bringing inconvenience in use with a great variety of fishing tools. The overshot can be widely used for fishing operation in oil field well workover.

Description

A kind of novel combination type fishing socket

Technical field:

The utility model relates to a kind of novel combination type fishing socket that a kind of oil well repairing operation is salvaged usefulness.

Background technology:

The oil field is in the well workover industry at present, in the instrument of salvaging at sucker rod, have only single putting and the sleeve pipe of different size or the fishing tool in the tubing string at different-diameter, different disconnected dislocation, a kind of instrument can only be salvaged at a kind of sucker rod or the disconnected situation of taking off of sleeve pipe, it is of a great variety that situation will cause fishing tool like this, uses, changes cumbersome, and service efficiency is low, increase the workover treatment cost simultaneously, be unfavorable for improving the production timeliness.For this reason, we develop a kind of novel combination type fishing socket in conjunction with production practices.

The utility model content:

The purpose of this utility model provides a kind of novel combination type fishing socket, it is single putting and the sleeve pipe of different size or the salvaging in the tubing string at different-diameter, different disconnected dislocation that this fishing socket has solved the fishing tool that exists in the prior art, cause the fishing tool kind many, use, change the problem of inconvenience, the utility model is the multifunction combined fishing socket of a kind of many specifications, realize simultaneously with satisfy different-diameter, the salvaging in the sleeve pipe of different size or the tubing string is put in different disconnected dislocation.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of novel combination type fishing socket is made of last doffing two parts, top cylinder is made up of top connection, upper shell, spring base, spring, little slips, doffing is made up of lower shell, spring, big slips: top connection top and sucker rod, top connection bottom and upper shell are screwed connection, be provided with small through hole in the upper shell, can discharge crude oil in the cylindrical shell, the upper shell bottom is provided with inner conical surface, upper shell and lower shell screwed connection, spring base is seated in the spring, can in upper shell, slide, with the little slips of spring compression, be provided with in the little slips to grab and drag for thread (bivalve); The epimere helical spring of square-section of packing in the lower shell, the stage casing is provided with inner conical surface, and hypomere is provided with guide shoe; Be provided with to grab in the big slips and drag for thread (bivalve).During work: in this fishing socket is gone into the well process as run into the sucker rod body, body enters by lower shell and enters lesser calorie watt behind the upper shell, under spring action, slips male cone (strobilus masculinus) and cylindrical shell inner conical surface match, and make the slips crown be close to the fish external surface all the time, so just make fish and slips that certain pretightning force is arranged, when carrying fishing socket, under the effect of frictional force, fish is being with the relative cylindrical shell of slips to move down, and the cylindrical shell inner conical surface forces slips to produce radially clamping force and bites fish; Fish introduces and props up the slips angle of lead by cylindrical shell, along with fishing socket is transferred fish and backed down the slips bivalve and enter or pass slips.On carry fishing socket, fish is being with slips and cylindrical shell to produce relative motion and is forming radially clamping force.Fish part cambered surface is bitten or is stuck on the shoulder of slips seam by slips.Operating process: this fishing socket is connected on the tubing string goes into the well, when fishing socket tubing string during down to top of fish, stop to transfer, rotation 3～5 circles are introduced fish, are carried on slowly then, coming on the fishing junk.At the beam hanger of different-diameter, only need to change corresponding big slips or little slips get final product, can realize operating if fall in different sleeve pipes or tubing string available corresponding guide shoe.

The beneficial effects of the utility model are:

Structure is simpler, and this fishing socket is multifunction combined fishing socket, can realize and satisfy different-diameter simultaneously, and different disconnected dislocations are put, the sleeve pipe or the sucker rod in the tubing string of different size are salvaged, and reach easy to use, and purpose improves the fishing effect efficiently.

Description of drawings:

Accompanying drawing is the utility model overall structure schematic diagram.

Among the figure 1, top connection, 2, upper shell, 3, spring base, 4, spring, 5, the lesser calorie tooth, 6, lower shell, 7, big slips.

The specific embodiment:

In the accompanying drawings, a kind of novel combination type fishing socket is made of last doffing two parts: top cylinder is made up of top connection 1, upper shell 2, spring base 3, spring 4, little slips 5; Doffing is made up of spring 4, lower shell 6, big slips 7: top connection 1 top and sucker rod, top connection 1 bottom and upper shell 2 are screwed connection, be provided with small through hole in the upper shell 2, can discharge crude oil in the cylindrical shell, upper shell 2 bottoms are provided with inner conical surface, upper shell 2 and lower shell 6 screwed connections, spring base 3 is seated in the spring 4, can slide in upper shell 2, compress little slips 5 with spring 4, be provided with bivalve in the little slips 5 and grab and drag for thread; The epimeres helical spring 4 of square-section of packing in the lower shell 6, the stage casing is provided with inner conical surface, and hypomere is provided with guide shoe; Being provided with bivalve in the big slips 7 grabs and drags for thread.

Claims

1, a kind of novel combination type fishing socket is made of last doffing two parts: top cylinder is made up of top connection (1), upper shell (2), spring base (3), spring (4), little slips (5); Doffing is made up of spring (4), lower shell (6), big slips (7), it is characterized in that; Top connection (1) top and sucker rod, top connection (1) bottom and upper shell (2) are screwed connection, upper shell is provided with small through hole in (2), upper shell (2) bottom is provided with inner conical surface, upper shell (2) and lower shell (6) screwed connection, spring base (3) is seated in the spring (4), can in upper shell (2), slide, compress little slips (5), be provided with bivalve in the little slips (5) and grab and drag for thread with spring (4); Pack into the helical spring (4) of square-section of the interior epimere of lower shell (6), the stage casing is provided with inner conical surface, and hypomere is provided with guide shoe; Being provided with bivalve in the big slips (7) grabs and drags for thread.