Pressure adjustable type plunger gas-lift wellhead device and monitoring method thereof

Abstract

The invention discloses a pressure adjustable type plunger gas-lift wellhead device and a monitoring method thereof. The pressure adjustable type plunger gas-lift wellhead device comprises a remote operating platform, a blowout prevention pipe and a bypass pressure adjusting pipeline; a side opening of the blowout prevention pipe is connected with the bypass pressure adjusting pipeline, and the bypass pressure adjusting pipeline is internally provided with a 90-degree pressure-bearing ball-shaped adjusting valve; and the remote operating platform is connected with the 90-degree pressure-bearing ball-shaped adjusting valve and is used for sending a signal to the 90-degree pressure-bearing ball-shaped adjusting valve to control opening and closing of a wellhead. The pressure adjustable typeplunger gas-lift wellhead device has the characteristics of simple structure and convenient operation, product development and on-site use of the pressure adjustable type plunger gas-lift wellhead device can greatly reduce the workload of on-site staffs, automatic and intelligent management of fluid discharging of a plunger in a gas field are strengthened, and the difficult problem of plunger welloperation is solved.

Description

Technical field [0001] The invention belongs to the technical field of natural gas field development, and particularly relates to a pressure-adjustable plunger gas lift wellhead device and a monitoring method thereof. It is a process integration of a plunger gas well control system and is suitable for the production process of gas well drainage and gas recovery. Background technique [0002] The diaphragm valve in the plunger equipment is an important part to control the opening and closing of the gas well. During the production process, the diaphragm valve is adjusted to achieve the reciprocating movement of the plunger to discharge liquid in the wellbore. [0003] Membrane valves currently used in gas fields have only two working conditions: fully open or fully closed. When the well is opened, the oil pressure drops rapidly and the plunger will move toward the wellhead; when the well is shut in, the bottom hole pressure begins to recover, and the plunger will fall to the bottom o...

AI Technical Summary

Problems solved by technology

When the overpressure or overspeed of the plunger is detected, the membrane valve is quickly closed (equivalent to shutting down the well), so that the plunger can reduce its speed, but at the same time, it affects the drainage of the plunger and the normal production of the gas well. The upward speed of the plunger can only be reduced by manually adjusting the opening of the wellhead needle valve and slowly releasing the pressure

[0005] Although the overpressure and overspeed monitoring module effectively avoids safety risks during plunger operation, it increases the difficulty of plunger gas well management

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