Multi-stage sealing adjustable full-bore type wellhead device

Abstract

The invention discloses a multi-stage sealing adjustable full-bore type wellhead device which is characterized in that the device comprises a guide pipe collar, an upper sealing head and an air intake and exhaust connector; the lower part of the guide pipe collar is connected with an API (American Petroleum Institute) guide pipe through screw threads; the upper part of the guide pipe collar is connected with the upper sealing head through straight threads; the upper sealing head and a frustum positioned at the lower end of the air intake and exhaust connector are connected through taper threads in a sealed manner; four O-shaped seal rings are arranged at the lower end of the upper sealing head; a sealing inclined plane is formed at the upper end of the upper sealing head; two O-shaped seal rings are arranged on the sealing inclined plane 2; the upper end part of the upper sealing head is a protruding circular ring; a waterproof rubber gasket is arranged on the inner side of the circular ring; and an air intake and exhaust port and a pollution discharge port are formed on the air intake and exhaust connector. The weight of the multi-stage sealing adjustable full-bore type wellhead device is less than that of a flange-type wellhead device and the two-thirds of steel material is saved. The structure is simple, the multi-stage sealing adjustable full-bore type wellhead device is easy to manufacture, and the processing cost is low. The weight is light, so that transport cost can be reduced by two-thirds. The field installation is simple. The directions of the air intake and exhaust port and the pollution discharge port can be adjusted optionally. The sealing is reliable and safe.

Description

technical field [0001] The invention relates to a gas storage well head device. Background technique [0002] In 2009, the State Administration of Technical Supervision required the gas storage wells to use full-bore wellhead devices in the gas storage well specification. At present, most gas storage well construction units use flange-type wellhead devices to achieve full-bore diameter. The flange-type wellhead devices are bulky and weigh 5-6 times the wellhead device of the old gas storage well, the cost is high and the installation is difficult. Contents of the invention [0003] In order to overcome the above disadvantages, the present invention provides a multi-stage sealing adjustable full-diameter wellhead device. The device has the advantages of simple structure, light weight, convenient installation, reliable and safe sealing. [0004] The multi-stage sealed adjustable full-bore wellhead device is characterized by: a conduit collar 1, an upper head 2, and an inta...

AI Technical Summary

Problems solved by technology

[0002] In 2009, the State Administration of Technical Supervision stipulated that the gas storage well wellhead device must adopt a full diameter. At present, most gas storage well construction units use the flange type wellhead device to realize the full diameter. The flange type wellhead device is large in size and weighs 5-6 times the wellhead device of the old gas storage well, high cost and difficult to install

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