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Perforating gun for horizontal well

A technology for perforating guns and horizontal wells, which is applied in wellbore/well components, production fluids, earthwork drilling and production, etc. It can solve the problem of radial rotation and axial movement of perforating gun bullet holders, and increase the explosion transmission of perforating guns Failure and other problems, to achieve the effect of reducing the chance of gun body bursting, reducing the loss of jet energy, and avoiding the failure of perforation conduction

Active Publication Date: 2022-06-07
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual perforating process, the bullet rack in the perforating gun may rotate radially or move axially during the downhole process, resulting in a decrease in the accuracy of the perforation position and increasing the probability of the perforating gun’s explosion failure

Method used

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  • Perforating gun for horizontal well
  • Perforating gun for horizontal well
  • Perforating gun for horizontal well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see Figure 4-8 As shown, a perforating gun for horizontal wells includes:

[0034] The gun body 42, the gun body 42 is cylindrical and tubular, the two ends of the gun body 42 are open, and the surface is provided with preset holes 421 corresponding to the positions of the perforating bullets 20, and the first and last sections of the gun body 42 are respectively installed with the gun head and the gun tail,

[0035] The bullet rack 43, the two ends of the bullet rack 43 are fixed in the gun body 42 through the positioning ring 41, and the center line of the bullet rack 43 and the center line of the gun body 42 are overlapped and arranged, and the perforating charges 20 are discharged on the bullet rack 43,

[0036] The detonator is located at the gun head of the gun body 42, and the detonator is connected to the detonating cord 50,

[0037] The positioning ring 41 includes a ring body 411 , a ring hole 412 is formed at the center of the ring body 411 , a ring groove ...

Embodiment 2

[0043] see Figure 1-4 As shown, the perforating guns 40 are connected by the joint piece 30, the two ends of the joint piece 30 are respectively connected with the adjacent ends of the two perforating guns 40, and the joint is provided with a first sealing sleeve 31, The two adjacent ends of the perforating gun 40 are connected, and the joint piece 30 can be selected from a flexible material to facilitate the positioning of the perforating gun 40 in the casing under the serial connection state. The tightness of the connection between the two perforating guns 40 is improved, and debris can also be prevented from entering the perforating gun 40 .

[0044] There is a through hole in the middle of the joint piece 30, and a first booster tube 32 and a second booster tube 33 are respectively installed at both ends of the through hole. The first booster tube 32 and the second booster tube 33 are respectively arranged on the adjacent perforating guns. At the end of 40 , the first bo...

Embodiment 3

[0050] When the perforating gun for horizontal well of the present invention is actually used: install the components on the perforating gun 40 in sequence, such as the bullet rack 43, the positioning ring 41, etc., it is necessary to ensure that the perforating position of the perforating bullet 20 corresponds to the position of the preset hole 421 , after the installation of a single perforating gun is completed, the perforating guns 40 are serially connected in sequence through the joint piece 30 and the first sealing sleeve 31, and the required perforating guns 40 are connected in series according to the perforating needs. The perforating gun 40 used in the present invention The length of the gun body 42 is 1 meter. During the process of connecting the perforating guns 40 in series, it is ensured that the energizing body 61 is arranged in the joint 30, and both ends of the energizing body 61 are connected to the first booster tube 32 and the second booster at the front and r...

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Abstract

The invention discloses a perforating gun for horizontal wells, which belongs to the technical field of petroleum exploration equipment. The device of the invention includes: a gun body, which is cylindrical and tubular, and preset holes corresponding to the positions of perforating bullets are arranged on the surface. The head and tail of the body are installed correspondingly to the gun head and tail, and the bullet holder. The detonator is arranged at the gun head of the gun body, and the detonator is connected with the detonating cord. The positioning ring includes a ring body. The blind hole corresponding to the position of the positioning hole, the positioning ring cooperates with the blind hole to fix the ammunition frame in the gun body through the fastener, and the blind hole is pre-filled with filler. The invention effectively ensures the accuracy of the perforation position and the alignment between the perforation direction and the preset hole, reduces the frictional resistance of the perforating gun, and designs a compensating explosion transmission to avoid the occurrence of perforation conduction failure.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration equipment, and in particular relates to a perforating gun for horizontal wells. Background technique [0002] Perforation is an operation activity in which special energy-gathering equipment is used to enter the predetermined horizon of the wellbore to make explosive openings to allow the fluid in the underground formation to enter the perforation. Most oilfields generally use energy-gathering perforating equipment. In the history of perforating, bullet-type perforating devices have been used. Some large oil companies in foreign countries also use water-flow perforating devices. The perforating gun is a combination of equipment used for perforating oil and gas wells and its accessories. [0003] With the deepening of oil and gas field development and exploitation, horizontal well exploitation is on the rise day by day. As the main completion method in oil and gas field exploration a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/117E21B43/119
CPCE21B43/117E21B43/119
Inventor 赵方琪李华陈德邱涛张祥梅齐颜平李瑞胡小刚杜衍青张俊
Owner BC P INC CHINA NAT PETROLEUM CORP
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