Mechanical recovery tool for underwater Christmas tree tubing hanger

Abstract

The invention discloses a mechanical recovery tool for an underwater Christmas tree tubing hanger. The mechanical recovery tool comprises a body and a locking mechanism installed on the body, and thelocking mechanism is used for locking a tree tubing hanger on the body and bearing the tree tubing hanger. According to the tool, oil pipe hangers are recycled, manual operation is not needed for recycling, the risk of an operator during undersea operation is avoided, time and labor are saved, compared with a common hook, the locking state of the tool is more stable, the problems of shaking, collision and dragging are not likely to happen, and the bearing effect is better.

Description

technical field [0001] The invention belongs to the technical field of underwater oil pipe recovery, and in particular relates to a mechanical recovery tool for underwater oil pipe hangers. Background technique [0002] With the increasing difficulty of onshore oil exploration and development, offshore oil and gas exploration and production activities have greatly increased. Offshore oil and gas field production facilities generally consist of three major parts: offshore platforms, underwater equipment, and offshore risers and subsea pipelines connecting the two. [0003] At present, vertical Christmas tree structures are usually used on oil / gas production wellheads on land and offshore platforms. Therefore, the tubing hangers used are mainly vertical channels up and down, and there are no horizontal oil production channels. In places where the space of some offshore platforms is limited, the tree structure is required to be compact and the height is low. In some places whe...

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Problems solved by technology

[0004] When traditionally recovering the tubing hanger, it takes a lot of time and effort to lock and recover the tubing hanger manually, which requires certain technical requirements for the operator, and the risk factor is high. Under special circumstances, the tubing hanger cannot be recovered in time;

[0005] Even if ordinary hooking tools are used, although they can carry the load, there will still be problems of unstable locking that will lead to shaking, collision or decoupling, especially when the recovery is close to the sea surface or when the sea is fluctuating greatly, the probability of shaking, collision and decoupling of the tubing hanger bigger

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