A double-head safety lifting device for drilling and workover

Abstract

The invention discloses a double-headed safety lifting device for drilling and workover, which comprises a frame, a casing is fixedly arranged on one side of the frame, two sets of fixed pulleys are fixedly arranged on the upper end of the casing, and the casing is located on the side of the casing. The left and right sides are respectively provided with moving pulley blocks, the moving pulley blocks are slidably connected with the casing through the sliding assembly, and the casing is provided with a driving assembly for driving the sliding assembly to drive the moving pulley block to approach or move away from the fixed pulley block. The present invention has no hydraulic pressure during the whole working process The length of the extended part of the lever makes the overall installation size small, and the structure is stable and safe. The T-shaped screw and the T-shaped nut of the movable pulley are threaded to make the drive assembly have self-locking ability to prevent the load on the wire rope. Heavy objects fall in an uncontrollable state, and the overall structure is simple, easy to install, use, maintain, and operate. It has a high degree of automation and can detect the working status of the double-head safety lifting device for drilling and workover in real time.

Description

technical field [0001] The main technical problem to be solved by the present invention is to provide a simple overall structure, no length of hydraulic lever extension in the whole working process, small installation size, self-locking function, stable overall structure, easy installation, use, maintenance and operation A convenient double-head safety lifting device for drilling and workover belongs 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] In order to solve the above technical ...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned hydraulic lifting devices for drilling and workover tools can be used to lift drilling tools and workover tools, but the overall structure is complicated. The use of double-rod hydraulic cylinders makes the overall manufacturing cost high and the sales price is high, and the hydraulic cylinder itself is not With self-locking ability, additional hydraulic lock auxiliary components, such as electromagnetic reversing valves, are required to realize self-locking. The biggest disadvantage of hydraulic cylinders is especially obvious in lifting devices. Because hydraulic cylinders are used as power execution units, they have heavy loads, high telescopic frequency, and continuous Long working hours, with the wear of the piston ring and other structures, it will cause internal leakage of the hydraulic cylinder, which will cause the brakes to fail during lifting operations, especially when fine structures such as the threads of the lifting parts are connected, causing uncontrollable troubles and inconvenient use. In addition, when installing and using, it is necessary to set the space for the extension part of the hydraulic lever, so that the overall extension length is large, the overall installation size is large, and when working, it is easy to bend and cause the sealing device to wear and tear, resulting in failure of the hydraulic cylinder seal. In addition, if the extension distance is too long, there is a high risk of piston rod breaking under special conditions.

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