PDM (Positive Displacement Motor) drill cleaning system

Abstract

A PDM (Positive Displacement Motor) drill cleaning system comprises a driving mechanism, a water distribution mechanism, a holding and centralizing mechanism and a water circulation and purification system. A driving motor of the driving mechanism is connected with a speed reducer, a drive shaft head of a water distributor of the water distribution mechanism is connected with a drive shaft, the drive shaft is connected with the drive shaft assembly of a PDM drill horizontally lying on supporting rollers and centralized by a pushing, centralizing and holding device and a centralizing and holding device of the holding and centralizing mechanism, the water outlet of the PDM drill is sequentially connected with a first-stage filtering tank, a second-stage filtering tank and a recycled water tank of the water circulation and purification system, the recycled water tank is connected with the inlet of a centrifugal water pump, and the centrifugal water pump is connected with the water inlet of the water distribution mechanism through a water supply tube, an electric valve and a pressure sensor; a hydraulic pump of a hydraulic station is connected with the hydraulic cylinders of the supporting rollers, the hydraulic cylinder of the pushing, centralizing and holding device and the hydraulic cylinder of the centralizing and holding device; a variable-frequency control cabinet is connected with the motor of the centrifugal water pump, the electric valve, the pressure sensor, the driving motor and the motor of the hydraulic pump of the hydraulic station.

Description

technical field [0001] The invention relates to a cleaning device for a screw drilling tool used in the petroleum industry, in particular to a thorough, efficient, convenient and quick cleaning device for a complete screw drilling tool. Background technique [0002] Screw drilling tools are important tools in the construction process of directional well drilling, horizontal well drilling, and workover in the petroleum industry, and with the promotion of composite drilling technology, the use of screw drilling tools is increasing day by day. When the screw drilling tool is overhauled after use, it is necessary to disassemble the screw drilling tool first, clean the internal mud, and then carry out various maintenance. Disassemble the overhauled screw drilling tool and use high-pressure water gun to wash it. The washing area is small, the time is long, and the cleaning efficiency is very low. Moreover, the key inner cavity parts cannot be cleaned, and there are certain unsafe ...

AI Technical Summary

Problems solved by technology

Disassemble the overhauled screw drilling tool and use high-pressure water gun to wash, the washing area is small, the time is long, the cleaning efficiency is very low, and the key inner cavity parts cannot be cleaned, there are still some unsafe factors, which seriously affect the follow-up maintenance work

In addition, many screw drilling tools are used in the well for a short time. After dismantling and overhauling, it is found that the wear of the accessories is very small, and they can continue to be used. Moreover, the accessories are easily damaged during disassembly, which is time-consuming and laborious.

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