Parallel torque coupling type energy-saving workover rig

Abstract

The invention discloses a parallel torque coupling type energy-saving workover rig. The parallel torque coupling type energy-saving workover rig comprises a small power machine, a large power machine, a first torque coupler, a second torque coupler, a third torque coupler, a hydraulic accumulator, a small quantitative hydraulic pump / motor, a large quantitative hydraulic pump / motor, a gearbox, a roller and the other parts, wherein the small power machine is connected with a shaft of the small quantitative hydraulic pump / motor through the first torque coupler; the large power machine is connected with a shaft of the large quantitative hydraulic pump / motor through the second torque coupler; the shafts of the small quantitative hydraulic pump / motor and the large quantitative hydraulic pump / motor are respectively connected with a chain wheel of the third torque coupler through clutches. Compared to the commonly used conventional workover jig, the power of the power machine can be reduced to 1 / 4 of the conventional workover jig, and further the gravitational potential energy released when the tubular column is put down can be recovered. The roller, the derrick, the gearbox and the other parts of the conventional workover jig are remained, and only the quantitative hydraulic pumps / motors, hydraulic accumulator and the other parts are added on the conventional workover jig, so that the cost is low.

Description

technical field [0001] The invention relates to workover equipment in the petroleum and natural gas industries, in particular to a parallel torque coupling energy-saving workover machine. Background technique [0002] One of the most common operations of workover rigs is the operation of raising and lowering pipe strings. The operation of the lifting string is an intermittent cycle process. The workover rig spends about 1 / 4 of the entire lifting cycle, while the time for auxiliary operations such as shackles and placing single strings takes up 3 / 4. Motorized hoisting strings require a power engine to work with high power, while auxiliary operations such as shackles and placement of single pipes require a power machine to work with low power. Conventional workover rigs have relatively large installed power in order to meet the needs of rapid lifting of pipe strings. The high-power power machine works under low power most of the time, the economy is poor, and the power mach...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the energy waste of conventional workover rigs in the operation of lifting and lowering pipe strings, and at the same time overcome the above-mentioned shortcomings of existing hydraulic energy storage workover rigs, the present invention provides a parallel torque coupling energy-saving workover well rig

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