High temperature deep well screw drilling tool

Abstract

The invention discloses a tool applicable to petroleum drilling and well repairing operation and mainly relates to a screw drilling tool for a high-temperature deep well. The gimbal part adopts a middle shunting cooling method so as to reduce the temperature of slurry passing through the screw drilling tool; the motor part of the screw drilling tool adopts high-temperature, alkali and acid resistant rubber for vulcanization; the rotor part adopts a tungsten alloy electroplating process; the transmission part of the screw drilling tool adopts 10 sets of serial shafts to lengthen a TC bearing; the transmission shaft part adopts a sealing device, is arranged outside an isolation sleeve or a transmission shaft and inside a transmission shaft shell or a lower nipple and is positioned on the upper end of an upper radial bearing and the lower end of a lower radial bearing respectively; therefore, the screw drilling tool can well bear and buffer vibration transmitted to the screw drilling tool from an underground bit in the operation of the deep well.

Description

Technical field: [0001] The invention relates to an ideal tool for deep well drilling and well repairing operations in oil drilling and well repairing operations. It mainly relates to a high-temperature deep well screw drilling tool. Background technique: [0002] The ordinary screw drilling tools used in oil drilling and workover operations in oil fields now have a temperature resistance within 120°, and the universal joints of the screw drilling tools used are fully sealed. The stator part is lined with rubber, and the rotor part is chrome-plated. In the transmission part of the screw drilling tool, 8 sets of string bearings are used, and the TC bearing is relatively short. Although there are some high-temperature screw drill designs, there is not much change in the overall structural application. The overall high-temperature resistance of the screw drill is not as good as Unable to make full use of it, faced with a well depth of more than 3500 and a temperature of more ...

AI Technical Summary

Problems solved by technology

In the transmission part of the screw drilling tool, 8 sets of string bearings are used, and the TC bearing is relatively short. Although there are some high-temperature screw drill designs, there is not much change in the overall structural application. The overall high-temperature resistance of the screw drill is not as good as Can’t make full use of it. Faced with the well depth of 3500 and above, the temperature reaches above 120 degrees, the motor stator of the screw drilling tool is still rubber degummed, and the motor is locked. So far, the service life of the screw drilling tool is not long, resulting in damage

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