Direct current controlled underwater test tree

Abstract

The invention discloses a direct current controlled underwater test tree. The direct current controlled underwater test tree mainly comprises two parts, namely, a connector and a safety valve, whereinthe connector consists of a movable pushing ring, a ball locking mechanism, a cable channel, a wet connector and a hollow shaft motor; and the safety valve consists of a movable pushing ring, a hollow shaft motor, a cable channel, a ball valve mechanism, a gear-rack device and a buffering device. The connector controls the ball locking mechanism thereof to work through the hollow shaft motor so as to realize the disconnection or connection of a test tubular pipe; and two ball valves are distributed up and down in the safety valve and are both controlled to rotate by the cooperation of the hollow shaft motor and a gear-rack so as to realize blocking, shearing or starting. According to the direct current controlled underwater test tree, the control of the connector and the safety valve in the underwater test tree is realized through the hollow shaft motor; the overall control and response speed is improved; the disadvantage of hydraulic control is overcome; the requirement on the safetycontrol of the tubular pipe of deep water oil and gas testing operation is met; and the safety of operating ship, personnel, equipment and environment in an emergency situation is ensured.

Description

technical field [0001] The invention relates to the field of offshore oil and gas development, in particular to a direct-electric control underwater test tree. Background technique [0002] With the development of industry in today's society, people's demand for resources is also increasing, and land resources are no longer enough to meet human demand for resources. Therefore, since the last century, people have turned their attention to the exploitation of marine resources. In the exploitation of marine resources, the exploitation of deep sea oil and gas is the main focus. Especially after entering the 21st century, the oil and gas development strategies of various countries are gradually shifting to the ocean. It is not difficult to predict that in the future resource war, deep-water oil and gas will occupy a large proportion. [0003] Oil and gas testing is an essential part of deepwater oil and gas development. During deep water testing, the floating platform or drill...

AI Technical Summary

Problems solved by technology

However, the long-distance hydraulic pipeline control in the deep water environment has a certain lag in response time, which greatly affects the evacuation efficiency of the drilling ship, and the hydraulic oil is prone to leakage, and its own compressibility will cause pipeline failure after a long time. deformation; and when the environment changes too much, the oil temperature and load change greatly, and it is difficult to maintain the stability of the load movement speed; the pollution of hydraulic oil has a significant impact on the stability of the hydraulic system, and may even cause the hydraulic system to fail; The flow in the pipeline will cause pressure loss. When the pipeline is long, the pressure loss will be greater and the power transfer efficiency will decrease.

Therefore, hydraulic transmission is not suitable for long-distance control and transmission, which limits the scope of underwater test trees; and the response speed of hydraulic control is slow, which is not conducive to the realization of efficient control

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