Downhole particle jet perforation device

A particle and perforating technology, applied in the production of fluids, wellbore/well components, earthwork drilling, etc., can solve the problem that the perforating effect of the perforating gun is not very good, so as to increase the perforation depth and action area, improve the Efficiency, flow-enhancing effect

CN106321032AActive Publication Date: 2017-01-11BC P INC CHINA NAT PETROLEUM CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-01-11

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Abstract

The invention relates to the field of oil drilling and completion, in particular to a downhole particle jet perforation device comprising a particle injection tank, a perforated short circuit, a retractable perforating nozzle, a fixed perforating nozzle, and a pilot drill bit. The high pressure mud and particles are mixed by the particle injection tank to reach the perforation short circuit, ejected from the retractable perforating nozzle and the fixed perforating nozzle at an adjustable angle to quickly penetrate the casing, the cement ring and the formation rock, and the pilot drill bit is mounted on the lower part of the perforation short circuit. The retractable perforating nozzle can achieve large depth perforation, and the perforation depth can be adjusted, the position, type and quantity of the retractable perforating nozzle and the fixed perforating nozzle can be selected according to the actual needs of the site. The downhole particle jet perforation device can effectively improve the efficiency of the downhole perforation operation, increase the perforation depth and the working area, enhance the fluid flow capacity of the stratum, and effectively improve the reservoir productivity.
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Description

technical field

[0001] The invention relates to a downhole particle jet perforating device, which belongs to the field of petroleum drilling and completion. Background technique

[0002] After the drilling and cementing operations are completed, the wellbore and the reservoir are closed. Usually, the perforation method is used to connect the reservoir and the wellbore. The pores formed after the perforation operation can allow the oil and gas fluid in the reservoir to enter the low-pressure wellbore, and finally transported to the wellhead for extraction. In conventional perforating operations, after the perforating gun is lowered to the predetermined position, the radial perforating bullets pass through the casing and the cement sheath and enter the formation. Usually, the perforating bullets form a cone-shaped perforation tunnel, and the diameter of the tunnel becomes smaller as it goes into the formation. Small, due to the limited energy of the perforating bullet, the de...

Examples

Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing:

[0018] Such as figure 1 As shown, the downhole particle jet reaming device according to the present invention includes: mud pump 1, mud pool 2, particle injection tank 3, faucet 4, kelly 5, drill floor 6, formation rock 7, cement sheath 8, Casing 9, 1# telescopic perforating nozzle 10, fixed perforating nozzle 11, drill pipe 12, drill collar 13, perforating short connection 14, 2# telescopic perforating nozzle 15, pilot drill bit 16, Particle separation device 17. The mud pump 1 sucks the mud in the mud pool 2 to form high-pressure mud, and the high-pressure mud is transported to the particle injection tank 3 through the high-pressure pipeline, and the particles in the particle injection tank 3 are mixed with the high-pressure mud to form a mixture of particles and mud, which is then sent to the faucet 4. After going down through the kelly 5, the drill floor 6, the drill ...