CN201367879Y - Drawing-in type box bell - Google Patents

Abstract

The utility model relates to a special tool for making thread and fishing on the outer walls of tubular dropped objects such as drill rods, oil tubes, and the like, in particular to a drawing-in type box bell. The drawing-in type box bell comprises a main body of the box bell, a connector and a guide shoe of the box bell, wherein, the connector is arranged at one end of the main body of the box bell and the guide shoe of the box bell is arranged at the other end of the main body of the box bell; the guide shoe of the box bell is a hollow columnar structure and a drawing-in fractured surface is formed at a notch at the top end of the box bell guide shoe. Due to the adoption of the structure, the problem of inconvenient fishing is solved since the caught fish is close to the tube wall and the utility model with simple and reasonable structure and convenient use has the advantages of improving the fishing efficiency, reducing the fishing time and the labor intensity, and the like.

Description

The introduction-type female coupling tap

Technical field

The utility model relates to a kind of specially from drilling rod, and the outer wall of tubulose junks such as oil pipe carries out the instrument that thread making is salvaged, and a kind of specifically introduction-type female coupling tap, this instrument can be used near the no endoporus of tube wall or the salvaging of the cylindrical junk that endoporus blocks.

Background technology

At present; domestic most of oil field is when operation; run into oil pipe through regular meeting and meet the card problem; the way that addresses this problem is exactly to adopt the fishing instrument of specialty; the cylindrical junk that blocks for some no endoporus or endoporus; salvaging is the comparison difficulty, so just need carry out thread making to cylindrical junk and salvage, and female coupling tap is exactly the instrument that carries out above-mentioned operation.Still there is certain shortcoming and defect in its structure of existing female coupling tap, is in particular in, when the fish of falling into the down-hole leaned on into tube wall, female coupling tap was difficult to be introduced into and carries out the hitch operation in it.

Summary of the invention

The purpose of this utility model is will provide a kind of simple and reasonable, easy to use, the fish (junk) of tube wall can be introduced female coupling tap, is easy to thread making, can reduces working strength of workers, salvages the high introduction-type female coupling tap of efficient.

The purpose of this utility model is achieved in that this introduction-type female coupling tap comprises female coupling tap main body, joint, female coupling tap guide shoe, and described joint is arranged on an end of female coupling tap main body, and the female coupling tap guide shoe is arranged on the other end of female coupling tap main body.

Described female coupling tap guide shoe is the open column shape structure, and the top indentation, there has one and introduces section.

The utility model has thoroughly solved because fish is pressed close to tube wall and has salvaged the inconvenience that brings to thread making owing to adopt said structure, has simple and reasonablely, easy to use, has to improve and salvages efficient, shortens the salvaging time, reduces advantages such as labor strength.

Description of drawings

Fig. 1 is an introduction-type female coupling tap overall structure schematic diagram.

The specific embodiment

Shown in accompanying drawing 1: this introduction-type female coupling tap comprises female coupling tap main body 1, joint 2, female coupling tap guide shoe 3, and described joint 2 is arranged on an end of female coupling tap main body 1, and female coupling tap guide shoe 3 is arranged on the other end of female coupling tap main body 1.

Described female coupling tap guide shoe 3 is the open column shape structure, and breach 4 places in top have one and introduce section 5.

Operating principle is: the lower end that during use joint 1 directly is connected fishing string (drilling rod or oil pipe), after this instrument is gone into the well when female coupling tap guide shoe 3 during near junk, slowly rotate tubing string, junk (fish head) is introduced female coupling tap main body 1 inner chamber, because have hard sharp screw buckle in the female coupling tap main body 1, the hardness of the common junk steel of the hardness ratio of steel is big, slowly rotates tubing string, female coupling tap main body 1 will be carried out thread making on junk, make junk be salvaged out by whole.

Claims (2)

1, a kind of introduction-type female coupling tap, this female coupling tap comprises female coupling tap main body (1), joint (2), it is characterized in that: it also comprises a female coupling tap guide shoe (3), and described joint (2) is arranged on an end of female coupling tap main body (1), and female coupling tap guide shoe (3) is arranged on the other end of female coupling tap main body (1).

2, a kind of introduction-type female coupling tap according to claim 1 is characterized in that: described female coupling tap guide shoe (3) is the open column shape structure, and top breach (4) is located to have one and introduced section (5).