Wellhead device suitable for plunger gas lift drainage and gas production and operation method thereof
A technology of wellhead device and gas lift drainage, which is applied in the direction of wellbore/well valve device, earthwork drilling, wellbore/well components, etc. It can solve the problems of difficult installation, complex structure and high manufacturing difficulty, and reduce investment cost, reduce manufacturing cost, and reduce the effect of manufacturing difficulty
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no. 1 approach
[0031] The first embodiment of the present invention relates to a wellhead device suitable for plunger gas lift drainage and gas recovery, see figure 1 , it includes a gas tree 5, the top of the gas tree 5 is connected to a blowout preventer 3 with a catcher 2 installed, a gas transmission unit is connected in parallel between the blowout preventer 3 and the gas tree 5, and the gas transmission unit includes at least a pneumatic membrane valve 27, the pneumatic membrane valve 27 is close to the ground.
[0032] Compared with the structure of the existing wellhead device, the wellhead device suitable for plunger gas lift drainage and gas production protected by this embodiment installs the pneumatic membrane valve 27 on the surface pipeline instead of the blowout preventer. This design optimizes the traditional The pipeline structure can accurately control the up and down reciprocating movement of the plunger 28; the function of the pneumatic membrane valve 27 is the same as th...
no. 2 approach
[0035] This embodiment relates to a wellhead device suitable for plunger gas lift drainage and gas recovery, see figure 1 , it includes a gas tree 5, the top of the gas tree 5 is connected to a blowout preventer 3 with a catcher 2 installed, a gas transmission unit is connected in parallel between the blowout preventer 3 and the gas tree 5, and the gas transmission unit includes at least a pneumatic membrane valve 27, the pneumatic membrane valve 27 is close to the ground.
[0036] The gas tree 5 includes at least a large cross 6 and a small cross 7. The two crosses have four nozzles, up, down, left, and right respectively. The lower nozzle of the large cross 6 is used to connect the wellhead flange 1, and the large cross 6 The left nozzle of the pipe is connected to the left-wing pipeline through a flange, and a casing pressure transmitter 8 is installed on the left-wing pipeline. The mouth is connected to the lower nozzle of the small cross 7 through a pipeline, the left no...
no. 3 approach
[0051] This embodiment provides a method for operating a wellhead device, which includes a wellhead device suitable for plunger gas lift drainage and gas recovery. The specific method is as follows:
[0052] The catcher 2 is installed in the blowout preventer 3;
[0053] Install the retainer 25 at a preset position in the oil pipe 26;
[0054] Then install the X-mas tree 5 at the wellhead, and connect the gas transmission unit with the X-mas tree 5 .
[0055] After completing the installation of the wellhead device, the plunger 28 is dropped into the blowout preventer 3, and the blowout preventer cap 9 is installed on the top of the blowout preventer 3.
[0056] For wellhead devices suitable for plunger gas lift drainage and gas recovery, see figure 1 , it includes a gas tree 5, the top of the gas tree 5 is connected to a blowout preventer 3 with a catcher 2 installed, a gas transmission unit is connected in parallel between the blowout preventer 3 and the gas tree 5, and th...
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