Injection and production integration wellhead device

Abstract

The invention provides an injection and production integration wellhead device, which comprises a wellhead, wherein the wellhead comprises a functional cross joint, a big cross joint, at least two wedge valves symmetrically arranged at the two ends of the functional cross joint, a sealing valve, a half sealing valve, at least two wedge valves symmetrically arranged at two wings of the big cross joint, a second flange, a pressure meter used for monitoring the oil pressure, and a pressure meter used for monitoring the casing pressure, wherein the functional cross joint and the big cross joint are connected through a first flange; the sealing valve and the half sealing valve are arranged at one end in the other two ends of the functional cross joint; one end of the second flange is used for being connected with the big cross joint, and the other end of the second flange is used for being connected with a casing pipe head; the wedge valves are connected through flanges and screw bolts; the functional cross joint and the at least two wedge valves symmetrically arranged at the two ends of the functional cross joint are used for controlling an oil pipe; and the big cross joint and the at least two wedge valves symmetrically arranged at the two wings of the big cross joint are used for controlling a casing pipe. The injection and production integration wellhead device provided by the invention has the advantages that the wellhead device does not need to be replaced in the gas injection and oil extraction process; the injection and production integration is realized; and the safety in the operation process is ensured.

Description

technical field [0001] The invention relates to a wellhead device for an oil field, in particular to an injection-production integrated wellhead device. Background technique [0002] At present, wellhead devices are widely used in oil fields. Most of the existing wellhead devices are connected to the casing head, and the casing head is connected to the downhole oil pipe and casing. During the process of gas injection and oil production, only the production string or injection One of the trachea strings, and the wellhead device needs to be replaced twice during the fire huff and puff process. On the one hand, the process is complicated and inconvenient to use. On the other hand, during the replacement of the wellhead device, the snubbing device cannot be used or installed. The blowout preventer and the wellhead are in a state of out-of-control for a long time, which poses a greater safety risk. Because the wellhead corrosion is prone to occur under high temperature and high p...

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Problems solved by technology

[0002] At present, wellhead devices are widely used in oil fields. Most of the existing wellhead devices are connected to the casing head, and the casing head is connected to the downhole oil pipe and casing. During the process of gas injection and oil production, only the production string or injection One of the trachea strings, and the wellhead device needs to be replaced twice during the fire huff and puff process. On the one hand, the process is complicated and inconvenient to use. On the other hand, during the replacement of the wellhead device, the snubbing device cannot be used or installed. The blowout preventer and the wellhead are in a state of out-of-control for a long time, and there is a large safety risk. Because the wellhead corrosion is easy to occur under the high temperature and high pressure working conditions, the safety in the operation process cannot be guaranteed.

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