Oil industry wellhead repairing device

Abstract

The invention relates to an oil industry wellhead repairing device. According to the technical scheme, the upper portion of a transition connecting sleeve is connected with an upper pressing cap through connecting bolts, a key sleeve is installed under the upper pressing cap, inner key grooves are formed in the key sleeve, the key sleeve is matched with outer keys of a repairing port jacket through the inner key grooves, the lower portion of the repairing port jacket is provided with T-shaped grooves, the bottom of a repairing port inner die is of a cone structure and provided with multiple gas injection holes, and the repairing port inner die communicates with a one-way valve arranged in an inner cavity of the repairing port inner die through the gas injection holes. The oil industry wellhead repairing device has the beneficial effects that through cooperation of a full gate sealing plate with the transition connecting sleeve, the key sleeve, the repairing port jacket, the repairing port inner die and the upper pressing cap, poisonous gas is effectively controlled, large-amount leakage is avoided, and automatic jetting or overflowing is avoided; and in addition, reaming repairingof a linear notch is achieved, the liquid outlet amount or the gas outlet amount is significantly increased, the problems in existing use of a coiled tubing are solved, and application of the coiled tubing is further promoted.

Description

Technical field [0001] The invention relates to a wellhead repair device in the petroleum industry, in particular to a coiled tubing cut restoration repair device. Background technique [0002] With the continuous development of coiled tubing technology, the development and application of coiled tubing oil production or coalbed methane technology has been promoted. The existing coiled tubing has good flexibility. A coil of coiled tubing is several kilometers long, which can replace conventional tubing for many operations. , Coiled tubing operation equipment has the characteristics of working under pressure, continuous lifting and lowering, the equipment is small in size, the operation cycle is fast, and the cost is low. It is especially suitable for the exploitation of spouting wells. Among them, the coiled tubing four-ram blowout preventer has a pivotal position in coiled tubing operations and belongs to a special wellhead blowout preventer. The existing coiled tubing four-ram b...

AI Technical Summary

Problems solved by technology

Although the above-mentioned invention improves the cutting tool, it still does not completely solve the problem of the incision, and still affects the fluid output of the coiled tubing, partially offsetting the advantages of large and stable fluid output of the coiled tubing

[0004] Therefore, for the four-ram blowout preventer with inline cuts that have been widely used in the oil field, this inline cut has seriously affected the liquid output or gas output of coiled tubing. There are some toxic gases in the pipeline, such as hydrogen sulfide, carbon monoxide, etc., and the energy of the formation is uncertain. Some oil and gas wells have high formation energy. Simply opening the four-ram blowout preventer to repair the cut may cause poisoning that is easy to operate However, it is easy to cause safety accidents such as blowout and overflow of high-pressure wells. Therefore, there is no special repair tool that can complete the repair work of the above-mentioned tubing cuts. Therefore, it is necessary to design a special repair device for straight cuts. Make a safe fix

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