CN213392114U

CN213392114U - Structure of perforation interlayer gun and intermediate joint

Info

Publication number: CN213392114U
Application number: CN202022307074.3U
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 intermediate layer rifle and intermediate head of perforation, includes the rifle body and sets up the joint at rifle body both ends, is equipped with the center tube in the rifle body, the utility model discloses be equipped with a set of support ring between the rifle body and center tube, make like this have great space between the rifle body and the center tube, liquid flows into the rifle internal pressure of messenger's rifle and the external pressure balance of rifle through the flow hole, has improved the compressive capacity of the rifle body effectively to avoided taking place the card rifle accident because of intermediate layer rifle is flattened, be equipped with the center tube connector of being connected with the center tube on one side of connecting, the through-hole in the protection joint when the explosion of center tube connector, avoid the damage that connects, the center tube connector is convenient to be changed, can reduce cost.

Description

Structure of perforation interlayer gun and intermediate joint

Technical Field

The utility model relates to an oil gas well exploitation technical field, concretely relates to structure of perforation intermediate layer rifle and intermediate head.

Background

When the perforating operation in a well is carried out, one or more interlayer guns are usually used for connecting perforating guns of two oil layers between the two oil layers so as to simultaneously complete perforation of the two oil layers, gun bodies of the interlayer guns have the connecting function and the sealing function, a detonating cord in a central tube in the gun bodies has the function of transmitting detonation energy, the perforating guns can form very high pressure when exploding in a shaft, the pressure is borne by the gun bodies, the interlayer gun bodies are often flattened or the gun bodies are greatly deformed when the working pressure is too high, the interlayer guns can be clamped in the shaft to cause gun clamping accidents, the length of a single interlayer gun is related to the thickness of an interlayer between the oil layers, and along with the increase of the length of the single interlayer gun, the bearing capacity of the gun bodies is reduced, and the possibility that the gun bodies are flattened and the gun clamping accidents are caused is increased.

The gun body of the sandwich gun is connected with the perforating gun or another sandwich gun through the intermediate joint, and the intermediate joint can be damaged when the perforator explodes in a shaft, so that the intermediate joint can be used only once, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a perforation interlayer gun and intermediate joint structure which avoids the gun clamping accident caused by the flattening of the interlayer gun and reduces the cost.

The technical scheme of the utility model is that: the utility model provides a structure of perforation intermediate layer rifle and intermediate head, includes the rifle body and sets up the joint at rifle body both ends, is equipped with the center tube in the rifle body, is equipped with the detonating cord in the center tube the rifle body with be equipped with a set of support ring between the center tube be equipped with on the rifle body and let the internal flow hole of liquid inflow rifle be equipped with the booster that supplies the detonating cord to pass in the joint, the booster is connected with and ends the back pipe the joint one side is equipped with the center tube joint of being connected with the center tube, end back pipe and center tube fixed connection.

Preferably, the support ring is provided with a positioning sheet, and the inner wall of the gun body is provided with a positioning groove matched with the positioning sheet.

Preferably, the flow port is located on the gun body adjacent the nipple.

Preferably, the flow holes are two pairs of symmetrical holes.

Preferably, a centralizing pipe for the booster to pass through is arranged on the other side of the joint.

Preferably, the central pipe joint is connected with the joint through threads.

Preferably, a first sealing ring is arranged between the central pipe joint and the joint.

Preferably, a second sealing ring is arranged between the central pipe and the central pipe joint.

Preferably, the two ends of the central tube are provided with blocking cover rings connected with the retaining tube.

Preferably, the joint comprises an upper joint and a lower joint, and the upper joint is in threaded fit connection with the lower joint.

The utility model has the advantages that:

1. the utility model is provided with a group of support rings between the gun body and the central tube, thus a larger space is provided between the gun body and the central tube, liquid flows into the gun body through the flowing hole to balance the pressure in the gun body and the pressure outside the gun body, and the pressure resistance of the gun body is effectively improved, thereby avoiding the gun jamming accident caused by the flattening of the interlayer gun;

2. be equipped with the center tube joint of being connected with the center tube on one side of connecting, the through-hole in the center tube joint protection joint when the explosion avoids the damage that connects, and the center tube joint is convenient to be changed, can reduce cost.

Drawings

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

fig. 2 is a schematic view of the gun body 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 sandwich gun and a middle joint comprises a gun body 1 and joints 2 arranged at two ends of the gun body 1, wherein a central pipe 3 is arranged in the gun body 1, a detonating cord is arranged in the central pipe 3, as shown in figure 1, a group of support rings 4 are arranged between the gun body 1 and the central pipe 3, so that a larger space is formed between the gun body and the central pipe, a flow hole 5 which can allow liquid to flow into the gun body 1 is arranged on the gun body 1, when the liquid flows into the gun body, the pressure in the gun body is balanced with the pressure outside the gun body, the pressure resistance of the gun body is effectively improved, and the gun clamping accident caused by the flattening of a sandwich gun is avoided; be equipped with the booster 6 that supplies the detonating cord to pass in connecting 2, booster 6 is connected with the pipe 7 that ends, is equipped with the center tube joint 8 of being connected with center tube 3 on one side of connecting 2, and center tube joint 8 protects the through-hole of one side in the joint when the explosion, avoids the damage that connects, and center tube joint 8 is convenient to be changed, can reduce cost, and the pipe 7 that ends and center tube 3 fixed connection, detonating cord get into center tube 3 through the pipe 7 that ends.

The support ring 4 is provided with a positioning sheet 9, and the inner wall of the gun body 1 is provided with a positioning groove 10 matched with the positioning sheet 9, so that the support ring 4 can be arranged on the gun body 1.

As shown in fig. 2, the flow holes 5 are provided near the joint 2 on the gun body 1, and the flow holes 5 are two pairs of symmetrical holes which are provided in a staggered manner for the rigidity of the gun body 1.

When the gun body of the sandwich gun is connected with the perforating gun or another sandwich gun through the middle joint, the booster pipe does not deviate, so that the other side of the joint 2 is provided with a centering pipe 11 for the booster pipe 6 to pass through, the centering pipe 11 can also play a role in protecting the joint, and the centering pipe 11 is made of elastic rubber materials.

To facilitate installation of the center tube connector on the joint, the center tube connector 8 is screwed to the joint 2, which also ensures that the booster 6 does not deflect.

Since the sandwich gun is a sealed structure, a first seal 101 is provided between the center pipe joint 8 and the joint 2, and a second seal 102 is provided between the center pipe 3 and the center pipe joint 8.

Two ends of the central tube 3 are provided with blocking rings 12, and the blocking rings 12 are arranged in the opening of the central tube 3.

Because the depth of oil gas well is generally several kilometers, consequently need the installation of many perforation guns and multiunit intermediate layer rifle, need intermediate layer rifle and joint zonulae occludens, consequently connect 2 and comprise top connection 201 and lower clutch 202, all be equipped with center tube connection 8 and centering tube 11 on top connection 201 and the lower clutch 202, when top connection 201 and lower clutch 202 screw-thread fit are connected, centering tube 11 of top connection 201 and the centering tube 11 butt joint of lower clutch 202 guarantee that the booster does not squint, simple to operate.

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. The utility model provides a structure of perforation intermediate layer rifle and intermediate head, includes rifle body (1) and sets up joint (2) at rifle body (1) both ends, is equipped with center tube (3) in rifle body (1), is equipped with detonating cord, its characterized in that in center tube (3): the utility model provides a gunpowder explosion gun, including the rifle body (1) and the center tube (3) between be equipped with a set of support ring (4) be equipped with on the rifle body (1) and let flow hole (5) in the liquid inflow rifle body (1) be equipped with in joint (2) and supply detonating cord to pass booster tube (6), booster tube (6) are connected with and end back pipe (7) joint (2) one side is equipped with center tube connector (8) of being connected with center tube (3), end back pipe (7) and center tube (3) fixed connection.

2. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: the gun is characterized in that the support ring (4) is provided with a positioning sheet (9), and the inner wall of the gun body (1) is provided with a positioning groove (10) matched with the positioning sheet (9).

3. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: the flowing hole (5) is arranged on the gun body (1) and close to the joint (2).

4. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 3, wherein: the flow holes (5) are two pairs of symmetrical holes.

5. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: and a righting pipe (11) for the detonation tube (6) to pass through is arranged on the other side of the joint (2).

6. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: the central pipe joint (8) is connected with the joint (2) through threads.

7. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: a first sealing ring (101) is arranged between the central pipe joint (8) and the joint (2).

8. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: and a second sealing ring (102) is arranged between the central pipe (3) and the central pipe joint (8).

9. The structure of the perforating sandwich gun and the intermediate joint as claimed in claim 1, wherein: two ends of the central tube (3) are provided with a blocking cover ring (12) connected with the anti-retreat tube (7).

10. The structure of the perforating laminated gun and the intermediate joint as claimed in any one of claims 5 to 7, wherein: the joint (2) comprises an upper joint (201) and a lower joint (202), wherein the upper joint (201) is in threaded fit connection with the lower joint (202).