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Hydraulic system of continuous string coiled tubing unit

A hydraulic system and operating machine technology, applied in the field of hydraulic systems, can solve problems such as circuit throttling power loss, overflow power loss, low efficiency, etc., and achieve the effects of effective oil temperature control, sufficient oil return heat dissipation, and high transmission accuracy

Inactive Publication Date: 2010-02-24
DALIAN JIAOTONG UNIVERSITY
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  • Abstract
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Problems solved by technology

[0002] At present, the coiled tubing machines used in various domestic oil fields are imported from abroad in the 1980s, and the price is very high. The hydraulic system of the equipment is a throttling speed regulation mode driven by a double quantitative pump. The biggest disadvantage of this speed regulation method It is due to throttling power loss and overflow power loss in the circuit, resulting in large power loss, large heat generation and low efficiency of the system
This speed regulation method is not suitable for occasions with large power and large speed regulation range.

Method used

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  • Hydraulic system of continuous string coiled tubing unit

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 As shown, the hydraulic system of a coiled tubing machine consists of an injection head hydraulic subsystem and a reel hydraulic subsystem. The injection head hydraulic subsystem is a closed volume speed regulation subsystem, including a two-way variable plunger pump 1 , quantitative radial piston motor 3, relief valve 4, oil filter 5, cooler 6, auxiliary charge pump 2 and safety valve A12, the outlet of the two-way variable piston pump 1 is connected to the quantitative radial piston motor The inlet of 3 is connected through the oil pipe, and the outlet of the quantitative radial piston motor 3 is divided into two paths, one path is connected with the inlet of the two-way variable plunger pump 1 through the oil pipe, and the other path is connected with the inlet of the relief valve 4 through the oil pipe, The overflow valve 4 is sequentially connected...

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Abstract

The invention discloses a hydraulic system of a continuous string coiled tubing unit, consisting of an injection head hydraulic subsystem and a barrel hydraulic subsystem, wherein, the injection headhydraulic subsystem is a closed volume speed-modulating system and is composed of a two-way variable plunger pump, a quantitative radial plunger motor, a spillover valve, an oil filter, a cooler, an auxiliary slippagepump and a safety valve A; the barrel hydraulic subsystem is an open volume throttling speed-modulating subsystem and is composed of a load-sensitive pump, a manual proportional valve, a barrel motor, a variable back pressure valve and a safety valve B. As the injection head hydraulic subsystem in the invention uses the closed volume speed modulating, throttling power loss is zeroand spillover power of passing through the spillover valve has small loss; as the barrel hydraulic subsystem uses the open volume throttling speed modulating, the spillover power loss is zero and thethrottling power loss is small. Therefore, the whole system features high efficiency, small calorific power, small power loss and high precision of system transmission.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system of a coiled tubing machine. Background technique [0002] At present, the coiled tubing machines used in various domestic oil fields are imported from abroad in the 1980s, and the price is very high. The hydraulic system of the equipment is a throttling speed regulation mode driven by a double quantitative pump. The biggest disadvantage of this speed regulation method It is due to throttling power loss and overflow power loss in the circuit, which leads to large power loss, large heat generation and low efficiency of the system. This mode of speed regulation is not suitable for occasions with high power and large speed regulation range. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to design a hydraulic system of a coiled tubing machine with small power loss, high effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/00F15B15/18
Inventor 许立李茂成朱乾敏王秀伦张宏亮刘元伟
Owner DALIAN JIAOTONG UNIVERSITY
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