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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 problems of radial rotation of perforating gun cartridge holders, decreased accuracy of perforating positions, and increased perforating gun Problems such as failure of explosion transmission can achieve the effect of reducing the chance of gun body bursting, reducing frictional resistance, and reducing the loss of jet energy

Active Publication Date: 2020-01-10
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, including:

[0034] The gun body 42, the gun body 42 is a cylindrical tube, the two ends of the gun body 42 are opened, and the surface is provided with preset holes 421 corresponding to the positions of the perforating charges 20, and the head and tail of the gun body 42 are respectively installed with the gun head and the gun tail.

[0035] The bullet frame 43, the two ends of the bullet frame 43 are fixed in the gun body 42 by the positioning ring 41, and the centerline of the bullet frame 43 coincides with the centerline of the gun body 42, and the perforating charges 20 are discharged on the bullet frame 43,

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

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

Embodiment 2

[0043] see Figure 1-4 As shown, the perforating guns 40 are connected by a joint piece 30, and the two ends of the joint piece 30 are respectively connected with the adjacent ends of the two perforating guns 40, and a first sealing sleeve 31 is provided at the joint, through which the joint piece 30 will The two adjacent ends of the perforating gun 40 are connected, and the joint part 30 can be made of flexible material to facilitate the positioning of the perforating gun 40 in the casing under the state of series connection. Improving the connection tightness of the two perforating guns 40 can also prevent debris from entering the perforating guns 40 .

[0044] There is a through hole in the middle of the joint piece 30, and the first detonator tube 32 and the second detonator tube 33 are respectively installed at both ends of the through hole, and the first detonator tube 32 and the second detonator tube 33 are respectively arranged 40, the first detonator 32 and the secon...

Embodiment 3

[0050] When the perforating gun for horizontal wells of the present invention is actually used: install the components on the perforating gun 40 in sequence, such as the bullet holder 43, the positioning ring 41, etc., and ensure that the perforating position of the perforating bullet 20 corresponds to the position of the preset hole 421 After completing the installation of a single perforating gun, the perforating guns 40 are sequentially connected in series 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 booster body 61 is arranged in the joint piece 30. At the same time, the two ends of the booster body 61 are connected to the first detonator tube 32 and the second detonator tube at the...

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Abstract

The invention discloses a perforating gun for a horizontal well, and belongs to the technical field of oil exploration equipment. The gun comprises a gun body, a gun carrier and a booster tube. The gun body is in a cylindrical tubular shape, the surface of the gun body is provided with preset holes corresponding to perforating bullets in position, the head segment and the tail segment of the gun body are correspondingly provided with a gun head and a gun tail, the two ends of the gun carrier are fixed into the gun body through a positioning ring, the center line of the gun carrier and the center line of the gun body coincide, perforating bullets are arranged on the gun carrier, the booster tube is arranged on the gun head of the gun body, and is connected with a detonating cord, the positioning ring comprises a ring body, the ring body is provided with a positioning hole, the positioning hole and the axis line of the ring body are inclined, the inner wall of the gun body is provided with a blind hole corresponding to the positioning hole, a positioning ring is matched with the blind hole through a fastening part to fix the gun carrier in the gun body, and the blind hole is filled with a packing material in advance. The perforating position precision and alignment of the perforating direction and the preset hole can be effectively ensured, the friction resistance of the perforating gun can be reduced, a compensation type detonation transmission is designed, and fail transmission of perforating can be avoided.

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 the operation activity of using special energy-gathering equipment to enter the predetermined layer of the wellbore for explosive drilling to allow the fluid in the downhole formation to enter the perforation. It is generally used in oil and gas fields and coal fields, and sometimes it is also used in the exploitation of water sources. Concentrated energy perforating equipment is generally used in most oil fields. In the history of perforating, bullet perforating devices have been used. Some large oil companies abroad also use water flow perforating devices. The perforating gun is a combination of equipment and accessories used for oil and gas well perforation. [0003] With the deepening of oil and gas field development and production, horizontal well product...

Claims

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Application Information

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IPC IPC(8): E21B43/117E21B43/119
CPCE21B43/117E21B43/119
Inventor 赵方琪
Owner BC P INC CHINA NAT PETROLEUM CORP
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