DOWNHOLE TOOL CLAMPING DEVICE Russian patent published in 2023 - IPC E21B47/01 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of geophysical research of oil and gas wells and is intended for pressing remote elements of downhole tools to the wall of the well. The clamping device of the downhole tool with a clamping lever (CL) contains a sealed housing, which houses the elements of a mechanical drive, including a gear motor, a power screw, and elements of a hydromechanical drive, including a hydraulic cylinder, a power rod. In the kinematic scheme for converting the torque (CT) from the gear motor into the translational movement of the power screw connected to the power rod, the gear motor transmits the CT to the transmission sleeve, to which the ratchet sleeve and the power sleeve are connected to the power rod. At the same time, the ratchet sleeve is pressed against the trapezoidal sleeve, which interacts with the trapezoidal nut interacting with the power screw, which is in contact with the power rod located in the annular piston, at the bottom of which there is a hydraulic chamber acting on the spring-loaded rod, in the groove of which the pin is located, rigidly connected to an additional lever pivotally connected to the CL. Fine-pitch threads are used in the power screw and the power bushing, and the trapezoidal thread of the trapezoidal bushing and the trapezoidal nut is single-threaded, and the area of the power rod is a multiple of the area of the spring-loaded rod.

EFFECT: invention improves the efficiency of actuation of the power hydromechanical drive by creating sufficient pressure in the hydraulic system to ensure reliable fixation of the clamping lever to the borehole wall.

6 cl, 3 dwg.