Piston type particle continuous injection system

Abstract

The invention belongs to the technical field of petroleum drilling engineering, and in particular, relates to a piston type continuous particle injection system. The system comprises crank connecting rod devices, piston devices, a power device and a feeding device, wherein each crank connecting rod device comprises a crank and a rotating shaft; one end of each crank coats the corresponding rotating shaft, and the other end is connected with the corresponding piston device; the rotating shafts are connected with the power device; each piston device comprises a piston cylinder; a piston is arranged in the piston cylinder, and is connected with a piston rod; each piston rod is connected with the corresponding crank; the tail end of each piston cylinder is connected with the feeding device; and the feeding device is communicated with a drilling liquid high-pressure main pipe. The system adopts two sets of identical crank connecting rod devices and piston devices; the two sets of devices synchronously operate and alternately work; under the condition of not changing the pressure of the high-pressure main pipe, particles with fixed concentration are always kept in the pipe, so that the continuous injection of the particles is really realized; the system can continuously work for a long time, so that the working efficiency is improved; and meanwhile, the system reduces the range of a high-pressure operation area.

Description

technical field [0001] The invention relates to a piston type particle continuous injection system, which belongs to the technical field of petroleum drilling engineering. Background technique [0002] Particle impact drilling technology is one of the effective ways to increase the drilling speed of deep wells, ultra-deep wells and hard formations. The particle injection device continuously injects steel particles into high-pressure drilling fluid at a certain rate, which is realized by particle impact drilling technology. premise and key. [0003] At present, the existing particle injection devices at home and abroad cannot truly realize the stable, uniform and continuous injection of particles. The negative pressure injection particle injection system has disadvantages such as unstable pressure and uneven injection; the screw extrusion particle injection system has poor sealing performance and serious wear, which limits its popularization and application; The leaves are ...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing particle injection devices at home and abroad cannot truly realize the stable, uniform and continuous injection of particles.

The negative pressure injection particle injection system has disadvantages such as unstable pressure and uneven injection; the screw extrusion particle injection system has poor sealing performance and serious wear, which limits its popularization and application; Disadvantages such as easy damage to leaves and more heat

The above situation seriously restricts the industrialization process of particle impact drilling technology, and the problems existing in the particle injection device need to be solved urgently

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