Multi-mode control method and apparatus for electrically controlling hydraulic oil pump by hydraulic drawworks

Abstract

The invention relates to a multiple-mode control method and a control device of a hydraulic winch electric control hydraulic oil pump, and the method and the device are suitable for the control of an oil logging winch. The multiple-mode control method is realized by that a built-out control module is added on a built-in electric control oil pump. When electric control fails, the control of rotating direction and the speed of a winch roller and the normal well testing task can be realized through the control of flow direction and flux of hydraulic oil of the electric control oil pump by the built-out control module. The control device comprises the built-in electric control oil pump and the built-out control module, wherein, an interior control oil passage between a proportion electromagnetic directional valve and an oil pump variable piston in the built-in electric control oil pump is blocked and is communicated with the built-out control module through an exterior control oil pipeline. Because the invention is added with the built-out control module, when a failure of an electric control system occurs, the invention can use the built-out control module to realize the well testingtask and can effectively protect cables and apparatuses underground.

Description

technical field [0001] The invention relates to an oilfield mechanical power transmission element, in particular to a power element hydraulic oil pump device of an oilfield hydraulic logging drawworks or well testing drawworks. Background technique [0002] At present, most of the power transmission of the hydraulic logging drawworks or well testing drawworks used in the oil field adopts the closed loop hydrostatic transmission system scheme. A two-way piston variable pump + axial piston motor or a two-way variable piston pump + radial piston motor is used to realize a closed volume speed regulation circuit, so as to control the rotation direction and speed of the winch drum. The above-mentioned two-way plunger variable pump mainly adopts electric control oil pump in China at present. When the input speed of the oil pump is a certain value, the flow direction and flow rate of the hydraulic oil of the oil pump are controlled by controlling the proportional electromagnet curre...

AI Technical Summary

Problems solved by technology

[0004] 1. The continuous working time of well testing and well testing operations is long, and sometimes it needs to work continuously for more than 20 hours. Under the long-term continuous working state, the electrical components of the electric control oil pump are affected by the heating of the components themselves, and their working reliability is affected.

[0005] 2. The winch for well testing and well testing is a mobile unit. During the driving process of the vehicle, the wiring contacts of electrical components are easy to loosen, and the components themselves are easily damaged by bumps.

[0006] To sum up, once the electrical components are damaged, the electrical control oil pump will not be able to work normally, resulting in the inability to perform normal logging operations, which will cause very large economic losses

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