Multi-stage perforation supercharging method

A technology of perforating and perforating guns, which is applied in the field of TCP tubing transmission perforation in oil and gas wells, can solve the problems of poor reliability, poor safety, high working intensity, and large working workload, and achieves maintaining motion stroke and high-precision shearing. , the effect of strong ignition ability
CN102031952BActive Publication Date: 2013-12-25CHUANNAN ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHUANNAN ENERGY TECH CO LTD
Publication Date
2013-12-25

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Abstract

The invention discloses a multi-stage perforation supercharging method. In the technological processes, a supercharging device is connected with the tail of a perforation gun of the upper level, after the perforation gun of the upper level is detonated, the perforation gun transmits detonation waves to the supercharging device, a baffle igniter of the supercharging device is detonated to ignite a supercharging gun powder mechanism, the supercharging gun powder mechanism generates high-pressure gas to push a supercharging piston to move to shear a shear pin of the supercharging device, and to push the piston to extrude a liquid inside an interlayer oil pipe so as to increase the pressure inside the interlayer oil pipe, and the shear pin of the lower-level detonation device is shorn off to detonate a pressure detonation device and a perforation gun of the lower level so as to complete the perforation operation of the lower level. The method can ensure the stability and the controllability of pressure generated due to the combustion of supercharging gun powder in a supercharging cavity, the pressure is then acted on the supercharging piston to ensure that the supercharging piston moves stably, the method can also realize high-precision shearing, can be used in a pressure type multi-stage perforation process, and is suitable for various well conditions.
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Description

technical field

[0001] The invention relates to the field of TCP tubing transmission perforation for oil and gas wells, in particular to a TCP multistage perforation pressurization method. Background technique

[0002] In the petroleum industry, oil well perforation operation is an important process, which is to lower the perforating gun into the target layer in the well, use the detonating device to detonate, and after detonation, the shaped charge will penetrate the perforating gun, casing and cement layer. The exit channel connects the stratum with the oil well, so that the formation oil and gas can flow into the oil well smoothly.

[0003] Multi-stage perforation technology refers to the perforation technology that penetrates multiple oil and gas layers at one time in the case of the next pipe string, which can reduce the number of perforations and save operating time and cost. The conventional multi-stage perforation operation methods are the perforation process with i...

Claims

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