Injection device for particle impact drilling

Abstract

The invention discloses an injection device for particle impact drilling. The injection device comprises a ground high-pressure main pipeline, a shunt pipeline, a shunt pipeline control valve, a steel particle storage tank, a hydraulic (or manual) charging valve, a storage tank pressure relief pipeline, a storage tank pressure relief control valve, steel particles, a screw propeller, a steel particle injection control valve and flow limiting devices, and is characterized in that: the flow limiting devices are arranged after the shunt pipeline; the shunt pipeline control valve is arranged between the ground high-pressure main pipeline and the steel particle storage tank; the storage tank pressure relief control valve is arranged between the steel particle storage tank and a drilling liquid bath; the screw propeller is positioned below the steel particle storage tank; and the steel particle injection control valve is positioned between the screw propeller and the ground high-pressure main pipeline. By the injection device, a plurality of problems of the conventional grinding material injection devices at home and abroad can be solved, the conventional foreign devices can be simplified, injection reliability can be improved, and steel particle injection for the particle impact drilling can be realized.

Description

technical field [0001] The invention relates to a particle impact drilling injection device, which belongs to the field of petroleum exploration and development. Background technique [0002] At present, the most advanced steel particle injection device developed by the American particle impact drilling technology company at home and abroad is too complicated, has many wearing parts, and is difficult to control. Most of the tests are terminated due to the failure of the injection device, and the reliability has not been solved. Practice has proved that, It does not well meet the requirements of particle impact drilling continuity. [0003] In addition, after more than 40 years of research at home and abroad, although abrasive injection devices such as orifice plates, pressurized funnels, mainstream flow splitters, accumulator transmissions, piston transmissions, motor or pump-controlled capsule control have been developed successively, due to the unavoidable Therefore, it c...

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Problems solved by technology

[0004] Due to the shortcomings and deficiencies of the above-mentioned abrasive injection devices at home and abroad, such as unavoidable entrainment of gas, introduction of other liquids, and uncontrollable injection speed, etc. during the injection process, they cannot be well used for injecting particles to impact steel particles for drilling. In view of this, this paper The invention draws on the research results of more than 40 years at home and abroad, and combines the actual working conditions of oil drilling and the technical characteristics of particle impact drilling to research and form a new steel particle injection device for particle impact drilling. The purpose of this invention is to provide a Reliable Steel Particle Injection Device for Particle Impact Drilling

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