Shaft-bottom throttling device and shaft-bottom throttling method of gas store
A throttling device and gas storage technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of poor throttling effect and low energy utilization rate, so as to reduce the pressure level and save investment Small, safety-enhancing effect
Active Publication Date: 2016-03-16
PETROCHINA CO LTD
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Problems solved by technology
[0005] The present invention provides a gas storage bottom hole throttling device and throttling method to solve the problems of low energy utilization rate and poor throttling effect in the gas extraction process of the gas storage.
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[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.
[0031] Such as figure 1 As shown, the gas storage bottom hole throttling device of the present invention comprises:
[0032] The power control device 1 is set on the ground or outside the wellhead of the gas storage;
[0033] The gas production string 3 is arranged in the wellbore; the gas production string 3 includes, for example, oil pipes with lower pressure resistance grades and gas trees with lower pressure resistance grades, and its functions are the same as those of conventional gas production strings;
[0034] A packer 4 is arranged between the gas production string and the wellbore;
[0035] The screw pump 5 has a certain corrosion resistance; it is connected to the bottom end of the gas production string; the screw pump is a direct device for throttling, p...
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The invention provides a shaft-bottom throttling device and a shaft-bottom throttling method of a gas store. The shaft-bottom throttling device of the gas store comprises an electric control device, a gas extraction pipe column, a packer, a screw pump, a power consuming device, a monitoring device and a cable, wherein the electric control device is arranged on the ground; the gas extraction pipe column is arranged in a well shaft; the packer is arranged between the gas extraction pipe column and the well shaft; the screw pump is connected to the bottom end of the gas extraction pipe column; the power consuming device is connected with the screw pump; the monitoring device is used for monitoring the type and performance of a fluid at the bottom of the well shaft, arranged at the bottom of the well shaft and positioned below the power consuming device; the cable is connected with the electric control device, the power consuming device and the monitoring device. The shaft-bottom throttling device of the gas store is adopted by the throttling method. The device and the method disclosed by the invention can be used for solving the problems that in an existing gas extraction process, the gas extraction equipment is high in investment, low in energy utilization rate and incapable of greatly improving the productivity during later period.
Description
technical field [0001] The invention relates to the field of oil and gas storage and transportation, in particular to a well bottom throttle device and a throttle method for a gas storage. Background technique [0002] In the gas storage process, generally rely on high formation pressure, self-spray gas production, install high-pressure gas trees and gas nozzles at the wellhead, control the flow rate, reduce the gas flow pressure, and meet the subsequent gas treatment and export requirements. [0003] However, there are three limitations in the gas nozzle throttling method: ① It is necessary to equip gas production strings and gas trees with high pressure resistance level, which increases investment; Not only is the energy useless, but it is necessary to inject alcohol and other substances at the wellhead to prevent freezing and blockage and increase the cost of gas production; ③ When the production capacity of the gas well is low in the later stage of gas production, the ga...
Claims
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IPC IPC(8): E21B43/12F01C13/00
CPCE21B43/126F01C13/00
Inventor 郑得文唐立根王皆明丁国生
Owner PETROCHINA CO LTD