Hydraulic lifting device for well drilling and repairing appliance

Abstract

The invention discloses a hydraulic lifting device for a well drilling and repairing appliance. The hydraulic lifting device includes a double-rod-ejection hydraulic cylinder main machine, pulley blocks are arranged at the two ends of the double-rod-ejection hydraulic cylinder main machine correspondingly, and a rack body for fixing and supporting the double-rod-ejection hydraulic cylinder main machine and a hydraulic oil circuit for controlling the double-rod-ejection hydraulic cylinder main machine to act are arranged on one side of the double-rod-ejection hydraulic cylinder main machine. According to the hydraulic lifting device for the well drilling and repairing appliance, the stroke of a hydraulic cylinder is divided into two sections through the double-rod-ejection hydraulic cylinder main machine, the extension length of a single hydraulic cylinder rod is reduced by 1 / 2, under the same conditions, the bearing capability of the hydraulic cylinder is increased by one time or above, a prerequisite is provided for lightweight of a complete machine, the manufacturing, installation, use and maintenance costs are lowered, the stability and safety of the complete machine are high, the hydraulic lifting device can flexibly adapt to various derrick structures, and the universality of the hydraulic lifting device is improved.

Description

technical field [0001] The invention relates to a hoisting device, in particular to a hydraulic hoisting device for drilling and workover tools with stable wire ropes, different hoisting speeds and easy speed control, belonging to the technical field of drilling equipment. Background technique [0002] At present, in domestic and foreign oil drilling sites, auxiliary small winches such as hydraulic small winches, pneumatic small winches or electric small winches are used in operations such as lifting drill bits, drill collars, drill pipes or throwing drill pipes, and running casings. Auxiliary small winches all have the problem that the steel wire ropes cannot be aligned, resulting in piles and broken wires of the steel wire ropes, posing safety hazards. [0003] The patent document with the patent number of 201510393889.9 discloses a drill pipe lifting device, which mainly includes a hydraulic cylinder host and a channel steel deck. A fixed pulley is installed on the hinge ...

AI Technical Summary

Problems solved by technology

[0006] 1. The pull ring is a non-moving part. During frequent operation, the vibration of the oil wire rope will cause the joint of the oil wire rope to wear out, posing a safety hazard.

[0007] 1. The buckle position of the derrick beam is fixed, and the adaptability to various types of derrick structures is poor, which is not conducive to the standardized production of the device, and the follow-up maintenance is complicated and difficult

[0008] , The steel wire rope between the movable pulley block and the fixed pulley block lacks necessary constraints, and the vibration of the steel wire rope brings about insufficient stability of the whole machine

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