Oil field well site casing gas recovery device and recovery method
A recovery device and casing gas technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., can solve the problems of casing pressure and gas volume limitation, poor economy, etc., and achieve a wide range of well sites and equipment The effect of high utilization rate and wide pressure range
Active Publication Date: 2017-07-07
PETROCHINA CO LTD
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Problems solved by technology
[0008] The purpose of the present invention is to provide a casing gas recovery device and recovery method at an oil field well site, which solves the problems of limited casing pressure and gas volume and poor economy in the existing casing gas recovery methods, and reduces the waste of casing gas resources. The recoverable casing gas has a wide range of pressure and gas volume, and the skid-mounted structure is convenient for transportation and arrangement, improving the economy of casing gas recovery
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[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.
[0023] Such as figure 1 As shown, the oilfield wellsite casing gas recovery device 100 provided by the present invention includes a casing gas inlet 101 and a casing gas outlet 102. The casing gas inlet 101 is connected to an inlet filter 103, and the inlet filter 103 is connected to the casing gas. Filtration is performed to remove solid impurities in the casing gas. In order to facilitate the control of the connection of the casing gas, a third control valve 1031 is provided between the inlet of the inlet filter 103 and the casing gas inlet 101 . The outlet of the inlet filter 103 is connected in parallel with a pressurized recovery circuit 104 and a casing gas straight-through circuit 105. The pressurized recovery circuit 104 ...
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The invention discloses an oilfield well site casing gas recycling device and a recycling method thereof. The oilfield well site casing gas recycling device comprises a casing gas inlet and a casing gas outlet, wherein the casing gas inlet is connected with an inlet filter; the outlet of the inlet filter is connected in parallel with a pressurizing and recycling circuit and a casing gas straight circuit; the pressurizing and recycling circuit comprises a first branch circuit and a second branch circuit which are connected in parallel with each other; a compressor is arranged on the first branch circuit; the casing gas straight circuit is arranged between the outlet of the inlet filter and the casing gas outlet; a first bypass valve is arranged on the casing gas straight circuit; the casing gas outlet is connected with a gas storage device. According to the invention, the compressor is used for compressing and pressurizing the casing gas; the recycled casing gas pressure range is wide; the device adopts a prying structure; vehicles are used for loading and transporting; the device is convenient to carry; the utilization rate of the device is high; the device is flexible in arrangement; the applicable well site range is wide; the casing gas recycling economy is high.
Description
technical field [0001] The present invention relates to oil field well site casing gas recovery technology, in particular to an oil field well site casing gas recovery device and a recovery method thereof. Background technique [0002] When crude oil is extracted in the oil field, the wellhead is composed of tubing and casing. The crude oil is pumped out from the tubing by the pumping unit, and the associated gas precipitated from the crude oil at the bottom of the oil well is distributed in the casing. If the casing gas is not discharged in time, the casing pressure will be too high, which will have a great impact on crude oil production. If it is not recycled, it will be directly vented or flared at the well site, which will pollute the environment and waste resources. The existing ways to recover casing gas are as follows: [0003] The first method is to use the constant pressure release valve. When the casing pressure exceeds a set value and is higher than the back pre...
Claims
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IPC IPC(8): E21B43/00
Inventor 崔翔宇冯凯生李兴春梁璇玑王万福刘子兵徐文佳薛岗李煜彭其勇
Owner PETROCHINA CO LTD