Battery type motor-driven double-speed PDC (polycrystalline diamond compact) drill bit

Abstract

The invention discloses a battery type motor-driven double-speed PDC (polycrystalline diamond compact) drill bit. The battery type motor-driven double-speed PDC (polycrystalline diamond compact) drillbit mainly comprises an upper joint, a battery rack, a battery, a battery protection cover, a conductive slip ring, a Y-shaped sealing ring I, a motor wire, a large spring, a motor, an epitaxial large drill bit body, a flow guide joint, a center small drill bit body and the like; the assembling sequence is as follows: a motor rotating shaft joint and the flow guide joint are arranged on a rotating shaft of the motor at first and are integrally arranged into the epitaxial large drill bit body provided with a Y-shaped sealing ring III and the motor wire, and the large spring is arranged inside;the battery wire, the battery, a sealing ring, the battery protection cover, small springs, the Y-shaped sealing ring I, the conductive slip ring and a Y-shaped sealing ring II are arranged in the battery rack separately, and the overall assembled battery rack and the epitaxial large drill bit body are assembled together; and the upper joint and the center small drill bit body are assembled. Thebattery type motor-driven double-speed PDC (polycrystalline diamond compact) drill bit controls a motor switch through drilling fluid, has the motor-driven and drill column-driven double-speed drilling characteristic and has the advantage of be ing capable of increasing the mechanical drilling speed.

Description

technical field [0001] The invention belongs to the field of oil and natural gas exploitation, and in particular relates to the design of a two-speed PDC drill bit driven by a battery type motor. Background technique [0002] With the deepening of exploration and development of oil and gas resources, there are more and more deep wells, ultra-deep wells and new oil and gas resource wells, and it is possible to encounter "three high formations" (high rock hardness, high rock drillability value, and high abrasiveness) In the process of drilling and breaking rocks with traditional PDC bits, the low rock breaking efficiency at the core is an important factor restricting the ROP. The main reason for the low rock breaking efficiency of the core is the low movement speed of the cutting teeth in the core of the wellbore during the rock breaking process, which causes the core of the drill bit to be "topped" by the rock during the drilling process, and the rock in the center of the bor...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the mechanical drilling speed in the technical background is not high, and proposes a two-speed PDC drill bit driven by a battery type motor

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