A pressurized drilling device for an oil and gas well head

Abstract

The invention provides a pressurized drilling device at the wellhead of an oil and gas well. The device includes an elevator, a pressure balance pipe, a pressure balance valve, a drilling unit, a packing assembly, a conversion head, a blowout prevention nipple, a blowout prevention valve, and a gate valve. , drill pipe string, pressure balance manifold and console, wherein the elevator is set at one end of the pressure balance tube; the middle part of the pressure balance tube is a hollow structure; the pressure balance valve is set at the other end of the pressure balance tube; the drilling unit includes The power mechanism and the actuator are connected to each other, and the actuator is arranged at one end of the pressure balance valve; along the drilling direction, the packing assembly, the conversion head, the blowout nipple, the blowout preventer valve and the gate valve are connected in sequence. The drill string is set in the drilling device; one end of the pressure balance manifold communicates with the hollow structure of the pressure balance pipe, and the other end communicates with the conversion head or the blowout prevention nipple; the console is used to start the lifting of the drill string Drilling and controlling the drilling speed of the drill string. The drilling device of the invention is easy to operate and has good sealing performance.

Description

technical field [0001] The invention relates to the technical field of oil and gas well development, more particularly, to a pressure drilling device for the wellhead of an oil and gas well. Background technique [0002] The gas production wellhead device is an important channel for the safe production of gas wells, and it is also the main device for the pressure control of gas wells. However, with the increase of the production life of gas wells, the wellhead device will have many hidden safety problems due to wear, corrosion, aging and other reasons. If it is not treated in time, it will affect the safe production of gas wells, seriously damage the surrounding environment, and threaten the lives of humans and animals. [0003] Drilling under pressure technology is aimed at the failure of the pressure-bearing flat valve to open, the unrelieved opening of the high-pressure pipeline, and the blockage of the wellhead string. Sealed connection, in the sealed state, the valves,...

AI Technical Summary

Problems solved by technology

[0002] The wellhead device of gas production is an important channel for the safe production of gas wells, and it is also the main device for gas well pressure control. However, with the increase of the production life of the gas well, the wellhead device will have many safety hazards due to wear, corrosion, aging and other reasons.

If it is not treated in time, it will affect the safe production of gas wells, seriously damage the surrounding environment, and threaten the lives of humans and animals.

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