Other

China University of Geosciences (beijing)

Dazhen Tang

Hao Xu

Song Li

Shu Tao

Shida Chen

Xinyang Men

Yaning Wu

The present invention discloses an adjustable gas detection device for coal bed comprising a detection direction adjustment assembly, a suction head angle adjustment assembly and an analysis bin, wherein the suction head angle adjustment assembly includes a suction head first-level angle adjustment assembly and a suction head second-level angle adjustment assembly, and the suction head first-level angle adjustment assembly includes a suction head that sucks a gas through a suction pump and sends it into the analysis bin through a suction pipe for analysis; the detection direction adjustment assembly and the suction head angle adjustment assembly jointly adjust a position and a direction of the suction head. The gas detection device for coal bed of the present invention has many degrees of freedom, can quickly complete the angle adjustment, and realizes rapidly-oriented detection, as well as having advantages of high control efficiency, rapid response, flexibility and reliability.

Adjustable gas detection device for coal bed

Disclosed is a fracturing device for extraction of coalbed methane in low permeability reservoir. In the disclosure, by controlling the fracturing of fracturing pipes and the sealing of a segmented sealing mechanism for fracturing using a fracturing controller, the fracturing in fracturing holes can be effectively controlled. The segmented sealing mechanism for fracturing in the disclosure can separate each of the fracturing pipes in the fracturing holes separately in a sealed manner respectively, and perform segmented fracturing operations using each of the fracturing pipes, so as to effectively improve the uniformity and thoroughness of fracturing and ensure fracturing ability. In the disclosure, when the sealing operations are performed in each segment, the sealing effect of each segment can be ensured, and the sealing efficiency can be ensured, so that the fracturing ability of each segment of fracturing is improved to ensure the fracturing effect.

Fracturing device for extraction of coalbed methane in low permeability reservoir

In the present disclosure, by providing a rotary torque sensor and an auxiliary drive mechanism, the drilling drive can be well controlled according to the required torque. For example, when encountering rock formations, the auxiliary drive mechanism can be used for simultaneous driving drilling, and when drilling in soft formations, only by disconnecting the transmission can the operation be completed, so as to effectively reduce energy consumption and improve utilization. In the present disclosure, when a rotary torque is greater than a set value, the controller controls the auxiliary drive mechanism to transmit to the main drive column and drive the main drive column, and when the rotary torque is smaller than or equal to the set value, the controller controls the power transmission between the auxiliary drive mechanism and the main drive column to be disconnected.

Drilling device at extracting opening for extraction of coalbed methane

Growing community of inventors

Beijing, China

Dazhen Tang