Downhole booster

A technology of supercharger and supercharger unit, which is applied in the direction of drilling with liquid/gas jets, etc., can solve the problems of poor manufacturability, poor sealing of the reversing valve of the downhole supercharger, and short service life.

Inactive Publication Date: 2013-12-18
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of supercharger to solve the above-mentioned existing problems, so as to solve the problems of poor seal, short life and poor manufacturability of the reversing valve of the downhole supercharger.

Method used

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  • Downhole booster

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Embodiment Construction

[0007] During the drilling process, the drilling fluid relies on hydraulic action to drive the downhole screw motor to rotate. The power shaft 2 and the power conversion body 6 convert the rotary motion of the screw motor into the reciprocating motion of the plunger 16, and drive the spline shaft 7, butterfly The reed shaft 11 and plunger 16 move downward, and the valve closes to pressurize the drilling fluid in the cylinder; driven by the butterfly spring 12, the spline shaft 7, butterfly spring shaft 11, and plunger 16 move upward, and the valve opens to suck Drilling fluid, such that one reciprocating movement completes one pressurization process of the supercharger.

[0008] During the entire pressurization process, the entry and exit of high-pressure drilling fluid are completed by a valve body. Drilling fluid flows out from the transmission shaft 1 of the screw pump, enters the inner flow channel of the butterfly spring shaft 11 through the inner flow channel of the powe...

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Abstract

The invention discloses a downhole booster, comprising a power unit, a power converting unit, a boosting unit, a valve bank and the like. The key to realizing ultra-high-pressure jet flow rock breaking technology is to manufacture a boosting device for generating an ultra-high-pressure water jet flow. For most boosting devices, a large piston is pushed by utilizing water pressure as power to push a small piston so as to boost a small part of drilling fluid. The devices have two technological difficulties: (1) the passageway of a booster is more complicated, so that the machining and mounting are very inconvenient; (2) the reversing device of the booster is short in service life and poor in sealing property, so that the service life of the whole booster is short. According to a novel booster disclosed by the invention, a screw pump is used as a power source, the rotating motion of the screw pump is converted into the reciprocating motion of a plunger through a converting component, so as to realize boosting on part of the downhole drilling fluid. The booster has the advantages of simple structure and convenient machining process, and the common problems of the conventional downhole booster that the reversing valve is poor in sealing property and short in service life are avoided.

Description

technical field [0001] The invention relates to drilling equipment, in particular to a downhole supercharger. Background technique [0002] Ultra-high pressure jet rock breaking technology is one of the new technologies to improve drilling speed of drilling machinery. The key to realizing this technology is to manufacture supercharging devices that generate ultra-high pressure water jets. At present, there are two ways to realize drilling fluid supercharging: surface supercharging and downhole supercharging. It is very difficult to transport the drilling fluid to the drill bit after pressurized on the ground. For this reason, many experts at home and abroad have researched and designed various downhole pressurization devices, and most of the pressurization devices are powered by water pressure. Pushing the big piston, the big piston and then pushing the small piston to pressurize a small amount of drilling fluid, this kind of device has two technical problems: (1) The flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18
Inventor 苏少航徐依吉巢建伟何云松苗乃明
Owner CHANGZHOU UNIV
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