CN213392113U

CN213392113U - Structure of perforating gun and intermediate joint

Info

Publication number: CN213392113U
Application number: CN202022308179.0U
Authority: CN
Inventors: 杨帆; 李元宏
Original assignee: Baoji Tongyuan Petroleum Drilling Tools Co ltd
Current assignee: Baoji Tongyuan Petroleum Drilling Tools Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-06-08
Anticipated expiration: 2030-10-16

Abstract

The utility model provides a structure of perforating gun and intermediate head, including the rifle body and joint, be equipped with the bullet frame in the rifle body, in order to prevent explosive fuse and the inner wall of the rifle body to cut the piece and rub, guarantee the intact degree of explosive fuse, a set of support ring is equipped with at the interval outside the bullet frame, the support ring makes and keeps the interval between bullet frame and the rifle body, be equipped with the booster that supplies the explosive fuse to pass in the joint pillar, the booster is connected with the backstop pipe, booster and backstop pipe wraps up the explosive fuse, the backstop pipe prevents that the explosive fuse from leading to the shrinkage deformation because of the difference in temperature reason, guarantee the booster distance of booster, guarantee the reliable booster of explosive fuse, be equipped with the joint pillar along the through-hole in the joint, the joint pillar protects the through-hole in the joint in the time of exploding, avoid the damage of joint, improve the use number of joint.

Description

Structure of perforating gun and intermediate joint

Technical Field

The utility model relates to a petroleum and natural gas well completion oil field, concretely relates to structure of perforation rifle and intermediate head.

Background

In the perforation operation of oil and gas wells, one or more perforators are commonly used for each oil layer and are connected to form a perforator string so as to meet the perforation requirement of the whole oil layer, and the company previously applies for an application number of a directional perforating gun and a joint structure: 2020201137055, the utility model discloses that at least two perforating guns are respectively contacted with the spiral ring at the two ends of the joint, the perforating guns at the two ends of the joint start to move along the relative axial direction of the joint by rotating the spiral ring, and the screw rings are screwed to ensure that the positioning pins at the two ends of the perforating gun joint are respectively inserted into the positioning grooves of the two perforating guns, so that the two perforating guns are kept connected with the joint and keep the same direction with the two ends of the joint.

The perforating bullets are connected through the detonating cord, so the completeness of the detonating cord is particularly critical, when the perforating bullet is installed, the detonating cord is wound on a bullet rack, the bullet rack is placed in a perforating gun, the perforating gun is transported or placed down into a well, the inner wall of a gun body can be cut and rubbed to the detonating cord, safety accidents occur, when the perforating bullet explodes, the intermediate joint can be damaged, the intermediate joint can only be used once, the cost is high, and the temperature in the well can influence the detonating cord due to thermal expansion and cold contraction.

SUMMERY OF THE UTILITY MODEL

For solving the defects of the prior art, the utility model provides a structure of perforation gun and intermediate head which can reduce cost, guarantee the integrity of detonating cord and prevent safety accidents.

The technical scheme of the utility model is that: a structure of a perforating gun and an intermediate joint comprises a gun body and a joint, wherein a bullet rack is arranged in the gun body, positioning rings are arranged at two ends of the bullet rack, perforating bullets are arranged on the bullet rack, and each perforating bullet is connected through a detonating cord;

a group of support rings are arranged on the outer side of the bullet rack at intervals, the support rings are circular rings with gaps, and detonating cords penetrate through the gaps on the support rings to be connected with perforating bullets;

the joint comprises a joint body, a positioning ring, a joint protection pipe, a detonating cord, a stop pipe, a threaded sleeve, a through hole, a joint protection pipe and a stop pipe, wherein the through hole is axially formed in the joint body, the joint protection pipe is arranged in the joint body along the through hole, the detonating cord penetrates through the detonating cord, the detonation pipe is connected with the stop pipe, the threaded sleeve is arranged on the positioning ring, an internal thread matched with the threaded sleeve in a threaded mode is arranged at one end of the joint protection pipe, and the stop pipe.

Preferably, the notches on the support rings are arranged in a staggered mode, so that the detonating cord can be spirally wound on the cartridge frame through the notches.

Preferably, the joint protection pipe is two annular pipes butted on the booster pipe.

Preferably, the stop pipe is made of copper material.

Preferably, the joint protection pipe is made of phenolic cloth.

Preferably, the detonating tube wraps the detonating cord.

The utility model has the advantages that:

1. in order to prevent the detonating cord from being scraped off the inner wall of the gun body and ensure the integrity of the detonating cord, a group of support rings are arranged at intervals outside the cartridge carrier, the support rings enable the cartridge carrier and the gun body to keep an interval, a detonating tube for the detonating cord to pass through is arranged in the joint protection tube, the detonating tube is connected with a backstop tube, the detonating cord is wrapped by the detonating tube and the backstop tube, the backstop tube prevents the detonating cord from being contracted and deformed due to temperature difference, the detonating distance of the detonating tube is ensured, and the reliable detonating cord is ensured;

2. the joint protection pipe is arranged in the joint along the through hole, protects the through hole in the joint when the joint protection pipe explodes, avoids damage to the joint, and improves the use times of the joint.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of a magazine structure.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model discloses technical scheme as follows: a structure of a perforating gun and an intermediate joint is disclosed, as shown in figure 1, and comprises a gun body 1 and a joint 2, wherein a bullet rack 3 is arranged in the gun body 1, positioning rings 4 are arranged at two ends of the bullet rack 3, perforating bullets are arranged on the bullet rack 3, and each perforating bullet is connected through a detonating cord;

in order to prevent the detonating cord from being cut and rubbed with the inner wall of the gun body 1, a group of support rings 5 are arranged at intervals outside the bullet rack 3, the support rings 5 enable the bullet rack and the inner wall of the gun body to keep an interval, and the completeness of the detonating cord is ensured;

the joint comprises a joint 2, a through hole 6 is axially arranged in the joint 2, two joint protection pipes 7 are respectively arranged in the joint 2 along the through hole 6, the two joint protection pipes 7 are butted to wrap a detonating tube 8, the joint protection pipes 7 are made of phenolic cloth materials, the joint protection pipes protect the through hole in the joint during explosion, the damage to the joint is avoided, the using frequency of the joint is improved, a detonating tube 8 for a detonating cord to pass through is arranged in the joint protection pipe 7, the detonating tube is connected with a stopping pipe 9, the detonating tube is made of copper materials, the detonating cord and the stopping pipe tightly wrap the detonating cord, the detonating cord is prevented from being contracted and deformed due to temperature difference, the detonating distance of the detonating tube is ensured, the detonating cord is ensured to be reliably detonated, in order to install the joint protection pipes in the joint, the end surface of the joint 2 is contacted with the end surface of a positioning ring 4, the positioning ring 4 is provided with a thread sleeve 10, one end, in order to prevent the explosion wire from being broken, the threaded sleeve 10 and the stopping pipe 9 are fixedly connected in an opening interference fit mode, and the explosion wire penetrates through the threaded sleeve from the stopping pipe to enter the charge rack to be connected with the perforating charge.

As shown in fig. 2, the notches of the support rings 5 are offset so that the detonating cord can be wound around the cartridge holder 3 through the notches.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A structure of a perforating gun and an intermediate joint comprises a gun body (1) and a joint (2), wherein a bullet rack (3) is arranged in the gun body (1), positioning rings (4) are arranged at two ends of the bullet rack (3), perforating bullets are arranged on the bullet rack (3), and each perforating bullet is connected through a detonating cord;

the method is characterized in that: a group of support rings (5) are arranged on the outer side of the bullet frame (3) at intervals, the support rings (5) are circular rings with gaps, and a detonating cord penetrates through the gaps on the support rings (5) to be connected with perforating bullets;

the anti-explosion joint is characterized in that a through hole (6) is axially formed in the joint (2), a joint protection tube (7) is arranged in the joint (2) along the through hole (6), an explosion transfer tube (8) for an explosion fuse to pass through is arranged in the joint protection tube (7), the explosion transfer tube (8) is connected with a check tube (9), a threaded sleeve (10) is arranged on the positioning ring (4), an internal thread matched with the threaded sleeve (10) is arranged at one end of the joint protection tube (7), and the check tube (9) is fixedly connected with the threaded sleeve (10).

2. The perforating gun and intermediate sub arrangement as recited in claim 1 wherein: the notches on the support rings (5) are arranged in a staggered manner, so that the detonating cord can be spirally wound on the bullet rack (3) through the notches.

3. The perforating gun and intermediate sub arrangement as recited in claim 1 wherein: the joint protection pipe (7) is two annular pipes butted on the booster pipe (8).

4. The perforating gun and intermediate sub arrangement as recited in claim 1 wherein: the anti-back-off pipe (9) is made of copper material.

5. The perforating gun and intermediate sub arrangement as recited in claim 1 wherein: the joint protection pipe (7) is made of phenolic cloth.

6. The perforating gun and intermediate sub arrangement as recited in claim 1 wherein: the detonating cord is wrapped by the detonating tube (8).