A device and method for pulling out coiled tubing under pressure

A process method and tubing technology, which is applied in the field of coiled tubing device with pressure pulling out, can solve the problems of reservoir damage, manpower and material resources, etc., and achieve the effect of avoiding injury and high-efficiency pulling out.
CN105089524BActive Publication Date: 2017-08-04PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2017-08-04

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Abstract

The invention relates to a coiled tubing device and a process method for pulling out under pressure, and belongs to the technical field of gas field exploitation. The method includes: using the injection head on the coiled tubing machine to clamp the connecting body of the feeding tool and the in-pipe plug, driving the in-pipe plug into the inside of the coiled tubing; lifting the feeding tool on the injection head to make the in-pipe plug sit Sealing, the injection head increases the lifting force to separate the plug in the tube from the feeding tool, the plug in the tube stays inside the coiled tubing, and seals the coiled tubing; penetrates the mandrel at the end of the coiled tubing, and installs the outer puller At the end of the coiled tubing, use a crane to lift the coiled tubing on the outer slip puller, so that the slips hanging from the coiled tubing are released; reversely pass the pulled out coiled tubing through the operation window, blowout preventer, injection head and other equipment in sequence, Then use the injection head to continue to lift the coiled tubing, and at the same time wrap the continuously pulled out tube into the drum on the coiled tubing machine.
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Description

technical field

[0001] The invention relates to a device and a process method for pulling out a coiled tubing under pressure, belonging to the technical field of gas field exploitation. Background technique

[0002] As the production time of the gas well continues, the production capacity of the gas well gradually decreases. When the flow rate of the gas well is lower than the critical liquid-carrying flow rate, the bottom of the well begins to accumulate liquid. If the liquid drainage measures are not taken in time, the gas well may be flooded and stop production. Based on the theory of wellbore two-phase flow and minimum liquid-carrying flow rate, a small-diameter coiled tubing is run into the original wellbore as a production string, and after the coiled tubing is cut off, it is suspended at the gas production wellhead by a special hanger. This technology can be used to a certain extent Reduce the critical liquid-carrying velocity of the gas well and increase the gas velo...

Claims

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