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Same-layer engagement perforating method and device

A meshing and perforating technology, applied in the field of petroleum exploration, can solve the problems of reducing crude oil production capacity, easily polluted formations, low timeliness, etc., and achieve the effect of increasing crude oil production capacity and reducing construction risks

Inactive Publication Date: 2019-12-31
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

[0004] In the prior art, the method of single perforation is usually used, but because the ammunition contained in a single perforation is limited, the arrangement density in the perforation gun needs to be improved, and the arrangement method needs to be regularized. When repeating perforating operations, it is necessary to lower the perforating gun twice, and it is necessary to kill the well when pulling out the first perforating string, which is easy to pollute the formation. The overall operation time of the two strings is low and the construction risk is high
[0005] To sum up, in the existing technology, the perforation method is likely to cause construction risks and reduce crude oil production capacity

Method used

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  • Same-layer engagement perforating method and device
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  • Same-layer engagement perforating method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In order to facilitate the understanding of this embodiment, firstly, the same-layer meshing perforating device disclosed in the embodiment of the present invention will be introduced in detail.

[0032] The embodiment of the present invention provides a same-layer meshing perforating device, including: a packer, an annular pressure device, a pressure transmission device, a longitudinal meshing and unfolding device, a phase meshing perforator and a second phase meshing perforator;

[0033] The annular pressure device 101 , the pressure transmission device, the packer 102 , the longitudinal engagement deployment device 103 and the phase engagement perforator are sequentially installed from the wellhead to the target layer.

[0034] Install the annular pressure device, the pressure transmission device, the packer, the longitudinal engagement deployment device, and the phase engagement perforator in sequence from the wellhead to the target layer;

[0035] The phase meshing...

Embodiment 2

[0041] The second embodiment of the present invention provides a method for meshing perforation in the same layer, which is specifically carried out according to the following steps:

[0042] S1: Connect the whole tool to the target layer, and carry out the depth adjustment work so that the packer is set on the well wall for sealing;

[0043] S2: Pressurize the annulus so that the pressure is transmitted to the annulus below the packer through the annular pressure device and the pressure transmission device, and detonate the bottom end shot of the first phase meshing perforator Hole gun, complete perforation;

[0044] S3: pressurizing the longitudinal engagement and deployment device to make the central tube cut off the pin, and the central tube moves to the limit step to realize the expansion and contraction of the longitudinal engagement and deployment device;

[0045] S4: The wellhead pressure is transmitted to the inside of the center pipe, so that the pressure detonation...

Embodiment 3

[0047] like image 3As shown, assemble the perforating gun according to the design phase, connect the first perforating gun and the second perforating gun with a phase adjustment joint, and use a certain phase of the first perforating gun 106 as a reference, rotate the second perforating gun gun 104, when the phase of the first perforating gun 106 and the phase of the second perforating gun 104 meet the design requirements, fine-tune the second perforating gun 104 so that the phase adjustment hole on the end face corresponds to the phase adjustment hole on the phase adjustment joint, and the upper Tighten the fixing pin, at this time the phase between the first perforating gun 106 and the second perforating gun 104 forms a fixed angle, and assemble the pressure detonating device on the bottom end of the first perforating gun 106 and the upper end of the second perforating gun 104 , constitute a complete phase meshing perforator.

[0048] Those skilled in the art can clearly u...

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Abstract

The invention provides a same-layer engagement perforating method and device, and relates to the technical field of oil exploration. The device comprises a packer, an annular pressurizing device, a pressure transmission device, a longitudinal engagement unfolding device and a phase engagement perforator; the annular pressurizing device, the pressure transmission device, the packer, the longitudinal engagement unfolding device and the phase engagement perforator are sequentially mounted from the well mouth to a target layer; and the phase engagement perforator comprises a first perforating gunand a second perforating gun which are connected. Through the method and device, the construction risk due to a perforating mode in the prior art can be reduced, and the productive capacity of crude oil is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method and a device for meshing perforation in the same layer. Background technique [0002] In petroleum exploration and development, perforation is a key link in the well completion process. At present, the most widely used is the use of shaped energy perforators, perforating casings and cementing cement sheaths to communicate wellbore and original formation for subsequent production. [0003] The perforator is composed of perforating charges, perforating guns and other pyrotechnic accessories. Its main indicators include penetration depth, aperture, hole density and phase. The penetration depth and aperture are determined by the performance of the perforating charge itself. It is determined by the density and arrangement of the perforating charges in the perforating gun. The penetration depth is the premise for the effective communication between the wellbore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/116E21B43/119E21B43/1185
CPCE21B43/116E21B43/11852E21B43/119
Inventor 张维山王朝晖胡津辉王宪超吕巍隋朝明张唯一张凯景阳马庆国韩向男王帅
Owner BC P INC CHINA NAT PETROLEUM CORP