Coal seam gas drilling rig power head tap device

Abstract

A coal seam gas drilling rig power head tap device comprises a water joint and a power head floating core shaft; a positioning nut sleeves a water inlet end of the power head floating core shaft; the positioning nut is in threaded connection with the power head floating core shaft. The coal seam gas drilling rig power head tap device is characterized in that a sealing connection mechanism is arranged between the positioning nut and the water joint; the sealing connection mechanism comprises a centering supporting sleeve which is fixedly connected with the positioning nut; a core pipe which is fixedly connected with the water joint is arranged inside the centering supporting sleeve; an inner chamber of the core pipe is communicated with an inner chamber of the power head floating core shaft and the water joint to form a water inlet channel; a centering mechanism is arranged between the outer wall of a water inlet end of the core pipe and the inner wall of the centering supporting sleeve; a sealing device is arranged between the outer wall of a water outlet end of the core pipe and the inner wall of the centering supporting sleeve. According to the coal seam gas drilling rig power head tap device, the structure is compact, the work is stable, sealing parts are convenient to replace, the integral installation and detachment is simple, the requirements of the actual use of the existing coal seam gas drilling rig are met, and the guarantee is provided for the improvement and innovation of the traditional core drill.

Description

technical field [0001] The invention relates to a coalbed methane exploration equipment, in particular to a coalbed methane drilling rig power head faucet device. Background technique [0002] With the development and application of domestic coalbed methane drilling rigs, the previous domestic coalbed methane drilling rigs were ordinary vertical shaft and rotary table drilling rigs, but after the introduction of foreign vehicle-mounted full hydraulic power head drive drilling rigs, there has been a qualitative leap in work performance and efficiency In the actual use process, foreign drilling rigs have shown their superiority, but the price of foreign drilling rigs is relatively high, and the supply cycle of parts is long, which makes the maintenance and repair of drilling rigs difficult. [0003] In recent years, the domestic technology has become increasingly mature and perfect. In response to the above problems, a new type of fully hydraulic multifunctional coalbed metha...

AI Technical Summary

Problems solved by technology

However, the full-hydraulic multi-functional top driving power head equipped with this kind of drilling rig has found that the faucet part often has mud leakage in a short period of time during actual use, resulting in the mud in the drill pipe being connected to the faucet through the floating mandrel of the power head If the leakage is serious, it will cause insufficient pressure in the mud system and cause accidents at the bottom of the hole

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