Multifunctional shale geological exploration drill bit and working method thereof

Abstract

The invention relates to a multifunctional shale geological exploration drill bit and a working method thereof. The multifunctional shale geological exploration drill bit comprises a drill rod connecting system, an auxiliary power system, a switching system, a sampling system and a cutting system which are sequentially and coaxially connected from top to bottom; a locking system is arranged between excircles of the auxiliary power system and the switching system; and spiral conveying impellers are coaxially arranged in the auxiliary power system and the switching system. The drill bit can workunder the condition that power is transmitted and conveyed through a drill rod at a wellhead, a shale sample can be obtained through a force application system of the drill bit, and a new technical means is provided for exploration and development of shale; and all components of the drill bit are convenient to mount and dismount, the sampling and drilling functions are achieved, the drilling androtating power of the drill rod can be utilized, and operation can also be conducted through the power of the drill bit.

Description

technical field [0001] The invention relates to a shale oil and gas exploration mechanical equipment, in particular to a multifunctional shale geological exploration drill bit and a working method thereof. Background technique [0002] Shale oil and gas is a kind of unconventional oil and gas resources. It is widely distributed all over the world, and it is also widely distributed in China. It has broad development potential. However, the degree of exploration in my country is still relatively low. One of the main reasons is that geological complexity has increased. The difficulty of exploration and development. Geological exploration sampling is an effective means to obtain the geological conditions of underground shale. At present, geological exploration sampling is mainly connected to ordinary drill bits through drill pipes, and power is applied through the wellhead, which is transmitted to the drill bit through the drill pipe, so that the drill bit cuts and impacts the fo...

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Problems solved by technology

[0002] Shale oil and gas is a kind of unconventional oil and gas resources. It is widely distributed all over the world, and it is also widely distributed in China. It has broad development potential. However, the degree of exploration in my country is still relatively low. One of the main reasons is that geological complexity has increased. The difficulty of exploration and development

Geological exploration sampling is an effective means to obtain the geological conditions of underground shale. At present, geological exploration sampling is mainly connected to ordinary drill bits through drill pipes, and power is applied through the wellhead, which is transmitted to the drill bit through the drill pipe, so that the drill bit cuts and impacts the formation. In deep wells and the geology is relatively complex, power is applied entirely by the wellhead, which may cause excessive torsional deformation of the drill pipe, or even direct torsion. Therefore, it is urgent to design a multifunctional drill bit that can provide cutting and impact power by itself. is of great significance

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