Coal-bed gas well rope coring drilling device

Abstract

The invention provides a coal-bed gas well rope coring drilling device which comprises a drill rod, a connecting pipe and a coring drilling pipe, the bottom of the drill rod is in threaded connection with the top of the connecting pipe, the bottom of the connecting pipe is in threaded connection with the top of the coring drilling pipe, the surface of the connecting pipe is sleeved with a limiting structure, and the bottom of the limiting structure penetrates into the coring drilling pipe, the limiting structure is matched with the inner wall of the coring drilling pipe for use; a measuring system is arranged in the coring drilling device and comprises a pressure sensor module, an ultrasonic transmitting module, an ultrasonic receiving module, a data processing module, a parameter setting module and a display module. The connecting pipe and the coring drilling pipe are moved upwards to drive the limiting structure to clamp a rock core, so that the limiting structure fixes the periphery of the rock core, meanwhile, the rock core is monitored in real time through the measuring system, the rock core is prevented from being separated, operation continues, time is saved, and the rock core sampling capacity and the working efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of core drilling, in particular to a wireline core drilling device for coalbed gas wells. Background technique [0002] Layered solid combustible minerals transformed from plant remains through complex biochemical and geological processes. It occurs in coal-bearing rock series and is located between the roof and floor rocks. Coring means to understand the geological conditions of the formation. The process of sampling rock from the formation being drilled. [0003] In the existing technology, in order to understand the low-quality conditions in coalbed methane wells, it is necessary to take coring from the corresponding rock formations. Coring requires the use of coring drilling equipment, and the core drilling pipe in the core drilling equipment is not easy to remove the rock When the core is taken out, the core will be affected by gravity when it moves upwards. When the core cracks, it will cause the core...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a wireline coring drilling device for coalbed methane wells, which can facilitate auxiliary fixation on both sides of the core, and can determine whether to fix the core, so as to solve the problem of existing core drilling. The problem of low core sampling efficiency

Images