A method of injecting liquid into pumping well
A technology for pumping wells and pumping units, which is applied in the fields of mining fluids, earthwork drilling, wellbore/well components, etc. It can solve the problems of chemical agent leakage, environmental pollution, and affecting the quality of chemical agent injection operations, etc., to ensure that The effect of injecting job quality
Active Publication Date: 2021-07-02
PETROCHINA CO LTD
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Problems solved by technology
Since the pressure of the pressurized chemical agent is 10-20MPa, the connection between the packing box 6 and the polished rod 3 of the pumping unit and the connection of the rubber gate 7 itself will cause chemical agent leakage, which not only affects the operation of injecting the chemical agent quality, but also pollute the environment
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no. 4 approach
[0125] The fourth embodiment of the present invention provides yet another method for injecting liquid into a pumping unit well. The method includes the following steps:
[0126] stop operating the pumping unit;
[0127] During the downward process of the beam of the pumping unit, brake the brake of the pumping unit;
[0128] Such as Figure 6 As shown, the second square clip 11 is installed on the polished rod 3 above the packing box 6;
[0129] Release the brake of the pumping unit (eg Figure 7 The suspension rope 4 of the shown pumping well is in a loose state);
[0130] Unload the load of the pumping unit (the structure of the pumping well with the second clamp and unload the load of the pumping unit is as follows Figure 8 shown);
[0131] remove as Figure 8 The shown first clip 1 and the rope hanger 2 connected with the polished rod 3 of the pumping unit (the structure of the pumping well where the first clip and the rope hanger are removed is as follows figur...
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The invention discloses a method for injecting liquid into a pumping unit well, which comprises the following steps: a. Stopping the pumping unit; b. Dismounting the first clamp (1) connected to the polished rod (3) of the pumping unit ) and rope hanger (2); c, unload the packing box (6) that is sealingly connected with the polished rod (3) and the rubber gate (7) that is connected with the double wire pup joint (8); d, place the The sealing cover (9) is fixedly connected with the double wire short joint (8), and the length of the sealing cover (9) is not less than the length of the polished rod (3) positioned above the double wire short joint (8); Liquid is injected into the casing annulus (X) of the pumping unit well described above. By using the method of the embodiment of the present invention to inject liquid into the pumping unit well, the wellhead of the pumping unit well will not leak, which can ensure the quality of the injection operation and will not pollute the environment.
Description
technical field [0001] The invention relates to the technical field of pumping wells in oil fields, in particular to a method for injecting liquid into pumping wells. Background technique [0002] At present, most onshore oil fields in my country use pumping units to produce crude oil. In the production process, it is necessary to inject chemical agents into the pumping wells, such as injecting polymer gel into the formation to chemically block the formation water, injecting microorganisms into the formation to drive the flow of crude oil in the reservoir, and injecting organic solutions into the formation. The plugging agent can be used to remove the plugging of the formation, etc., so as to increase the production increase of the pumping well. Since these chemicals are basically non-corrosive, the specific operation of injecting chemicals into the pumping well can be as follows: figure 1 As shown, the chemical agent is injected from the tubing 200 of the pumping well and...
Claims
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IPC IPC(8): E21B33/13E21B43/22E21B37/00
CPCE21B33/13E21B37/00E21B43/16
Inventor 王志强游靖余吉良谢刚史磊谷溢卫俊杰高珊珊张田田张雪梅
Owner PETROCHINA CO LTD