CN102733771A

CN102733771A - Fishing female tap

Info

Publication number: CN102733771A
Application number: CN2012102486871A
Authority: CN
Inventors: 胡生浩; 潘大冬
Original assignee: CHONGQING WANGJIANG XINQI MACHINERY Co Ltd; Chongqing Wangjiang Industry Co Ltd
Current assignee: CHONGQING WANGJIANG XINQI MACHINERY Co Ltd; Chongqing Wangjiang Industry Co Ltd
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2012-10-17

Abstract

The invention discloses a fishing female tap, comprising a joint (1), a water hole (2), a female tap main body (3) and buckle-making thread (4), wherein the joint (1) is arranged on the end part of the female tap main body (3); inner thread is arranged in the joint (1); the water hole (2) is arranged on the center of the female tap main body (3); the buckle-making thread (4) is arranged on the inner circumference face of the lower part of the female tap main body (3); the whole buckle-making thread (4) is outwards enlarged gradually so as to form a cone shape; the fishing female tap is characterized in that at least one chipping groove (5) is distributed on the surface of the inner circle of the buckle-making thread (4) along a longitudinal direction and is concave towards a radial direction; the chipping grooves (5) are arranged on the outer edge surface of the inner circle of the buckle-making thread (4) in a parallel manner or in a mutual-inclination manner; the chipping grooves (5) are sawtooth-shaped, triangle-shaped or semi-circle-shaped, ellipse-shaped or rectangle-shaped and ladder-shaped. According to the invention, because the fishing female tap has the concave-downwardly chipping grooves (5), buckle making and bit discharging can be processed conveniently; furthermore, service life is prolonged; and cost is saved.

Description

A kind of box tap

Technical field

The present invention relates to a kind of down-hole fishing string instrument that is used for oil, well workover treatment salvaging construction, be specifically related to a kind of box tap.

Background technology

Female coupling tap is a kind ofly specially to have the outer wall of tubulose junk to carry out the pipe column tools that thread making is salvaged from oil pipe, drilling rod etc., can be used for not having the salvaging of the cylindrical junk that endoporus or endoporus block.This instrument is very high for the tubing fishing junk success rate of band box cupling.Female coupling tap and positive and negative button drilling rod and other instruments are used, and can realize different fishing process.The internal thread that is provided with in the box tap joint is connected with the drilling tool of exerting pressure (like helicoid hydraulic motor etc.); Through the pressure of the drill from drilling tool; Transmit pressure and moment of torsion; Evenly creeping under the rotating speed, through the method for box tap bottom taper thread thread making in tubing string hydrophthalmias such as drilling rod, drill collar and sleeve pipe, fish is being salvaged out simultaneously.According to domestic statistics, every dozen of five mouthfuls of wells possibly just have a bite well to need to salvage, and whenever repairing five mouthfuls of wells possibly just have the four-hole well to need to salvage.Box tap is to salvage effective, the most most economical fishing tool of fish.

At present, employed box tap on the market comprises joint, hydrophthalmia, female coupling tap main body and thread making screw thread; Be provided with internal thread in the said box tap joint, said joint is located at said female coupling tap body end, and said thread making screw thread is located at said die nipple lower body part inner headed face; Said hydrophthalmia is located at said die nipple main center, because thread making screw thread outer is a shiny surface, does not have chip trough; Cause being difficult to chip removal, its screw thread directly rubs with salvaging thing for a long time, damages easily; Thereby application life is lower, need often more renew, and this is bigger cost and the expense of having increased just.

Summary of the invention

The technical problem that the present invention will solve provides that a kind of chip removal is easy, the life-span is higher, lower-cost box tap.

For solving the problems of the technologies described above, box tap of the present invention comprises joint, hydrophthalmia, die nipple main body and thread making screw thread; Said joint is located at said female coupling tap body end; Be provided with internal thread in it, said hydrophthalmia is located at said female coupling tap main center, and said thread making screw thread is located at said female coupling tap lower body part inner headed face; Integral body becomes the big taper that forms from inside to outside gradually, it is characterized in that: longitudinally be distributed with a chip trough that court is radially recessed in the said thread making screw thread on the face of circle outer at least:

Said chip trough is parallel to each other on said thread making screw thread internal circular surfaces;

Said chip trough tilts on said thread making screw thread internal circular surfaces each other;

Said chip trough is zigzag, triangle or semicircle, oval or rectangle, trapezoidal;

Said chip trough is longitudinally gone up on thread making screw thread cylindrical evenly and at intervals and is distributed.

Compared with prior art, box tap of the present invention is convenient to thread making and chip removal owing to have to recessed chip trough, and then improves application life, practices thrift cost.

Description of drawings

Fig. 1 is the structural representation of box tap of the present invention;

Fig. 2 is the sectional view at Figure 1A-A place.

The specific embodiment

Below in conjunction with the accompanying drawing further explain specific embodiment of the present invention:

Referring to box tap of the present invention shown in Figure 1; Comprise joint 1, hydrophthalmia 2, female coupling tap main body 3 and thread making screw thread 4; Said joint 1 is located at said female coupling tap main body 3 ends; Be provided with internal thread (not drawing among the figure) in it, said hydrophthalmia 2 is located at said female coupling tap main body 3 centers, and said thread making screw thread 4 is located at said female coupling tap main body 3 bottom inner headed faces; Integral body becomes the big taper that forms from inside to outside gradually, it is characterized in that: longitudinally be distributed with a chip trough 5 that court is radially recessed on said thread making screw thread 4 internal circular surfaces at least.

Referring to shown in Figure 2, be distributed with one at least to recessed chip trough 5 on said thread making screw thread 4 internal circular surfaces; In conjunction with box tap illustrated in figures 1 and 2; It is thus clear that chip trough 5 longitudinally is distributed on the internal circular surfaces of thread making screw thread 4 evenly and at intervals; Have 5, also can be 2,3,4,6 or 7,8; Specifically decide, be as the criterion can satisfy enough intensity according to the size of female coupling tap main body 3 diameters; Said chip trough 5 is parallel to each other or tilt (not drawing among the figure) on said thread making screw thread 4 internal circular surfaces, and parallel being convenient to made and chip removal, and then chip removal better effects if tilts; Said chip trough 5 is zigzag, triangle or semicircle, oval perhaps rectangle, trapezoidal (not drawing among the figure).Such structure can utilize special standard cutter to process, and manufactures easily simple.

Said thread making screw thread 4 screw thread hardness are HRC60-65, can reach like this to use needed hardness.

Box tap of the present invention is not limited to the above-mentioned specific embodiment; As long as be distributed with various embodiments at least on the circle in the said thread making screw thread that those skilled in the art can think in above-mentioned embodiment scope, all fall in protection scope of the present invention to recessed chip trough.

Claims

1. box tap; Comprise joint (1), hydrophthalmia (2), female coupling tap main body (3) and thread making screw thread (4); Said joint (1) is located at said female coupling tap main body (3) end; Be provided with internal thread in it, said hydrophthalmia (2) is located at said female coupling tap main body (3) center, and said thread making screw thread (4) is located at said female coupling tap main body (3) bottom inner headed face; Integral body becomes the big taper that forms from inside to outside gradually, it is characterized in that: longitudinally be distributed with a chip trough (5) that court is radially recessed on said thread making screw thread (4) internal circular surfaces at least.

2. box tap according to claim 1 is characterized in that: said chip trough (5) is parallel to each other on said thread making screw thread (4) internal circular surfaces.

3. box tap according to claim 1 is characterized in that: said chip trough (5) tilts on said thread making screw thread (4) internal circular surfaces each other.

4. box tap according to claim 1 is characterized in that: said chip trough (5) is zigzag, triangle or semicircle, oval or rectangle, trapezoidal.

5. according to the described box tap of each claim in the claim 1 to 3, it is characterized in that: said chip trough (5) is zigzag, triangle or semicircle, oval or rectangle, trapezoidal.

6. according to the described box tap of each claim in the claim 1 to 4, it is characterized in that: said chip trough (5) is longitudinally gone up evenly and at intervals on the circle in thread making screw thread (4) and is distributed.