An oil well throttling self-regulating water pipe string and its control method
A self-regulating and oil well technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of long construction period of measures, affecting the oil production rate and production capacity of oil wells, and large workload, so as to save construction The effect of job cost
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Embodiment 1
[0027] like figure 1 As shown, an oil well throttling self-regulating water pipe string includes an oil pump 9 arranged at the outlet of the oil well and a pipe string body 10 lowered into the oil well. The pipe string body 10 is composed of 4 short pipe strings from right to The left side is formed by connecting the first fouling generator 2, the second fouling generator 4, and the third fouling generator 6 respectively, and the two ends of the column body 10 are respectively provided with guide plugs 1 and hand plugs. joint 8, and the guide plug 1 is close to one end of the first fouling generator 2, and the third packer 7 is sleeved on the pipe string directly between the hands-off joint 8 and the third fouling generator 6, so A second packer 5 is sleeved on the pipe string between the third fouling generator 6 and the second fouling generator 4, and the second fouling generator 4 and the first fouling generator The first packer 3 is sleeved on the pipe string between 2
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Embodiment 2
[0030] On the basis of Example 1, such as figure 2 , 3 The first fouling generator 2, the second fouling generator 4, and the third fouling generator 6 shown are fouling generators with the same structure, and the fouling generators include couplings connecting short pipe strings 33 and the central tube 32 with a hole at the center of the collar 33, the outer surface of the collar 33 is tapped with an outer winding wire 31, and the fluid passage formed by the outer winding wire 31 on the collar 33 and the collar The inner surface of 33 is connected with the chemical filling chamber 34 formed by the center pipe with holes 32; the chemical filling in the chemical filling chamber 34 is BaCl 2 or Na 2 CO 3 .
[0031] During the working process, the oil enters the chemical filling chamber 34 from the fluid channel formed by the outer winding wire 31 from the coupling 33 , and enters from the chemical filling chamber 34 through the hole on the center pipe 32 with holes. In the...
Embodiment 3
[0033] The first packer 3, the second packer 5, and the third packer 7 are all Y441 packers, which can serve for a long time without causing downhole accidents. To achieve step-by-step unsealing, after the hydraulic setting is completed, the hands-free joint is discarded, and it cooperates with the Y441 packer to seal off each layer. When the pump is checked, the pumping string is raised, and the water plugging string remains in the well.
[0034] A method for throttling and self-regulating water in an oil well, the specific steps are as follows:
[0035] 1) Lower the oil well throttling self-regulating water string into the oil well;
[0036]2) After the oil well throttling self-regulating water pipe string is lowered to the predetermined position, the wellhead is pressurized; the packer is set to separate the layers;
[0037] 3) Continue to suppress, when the drop tool is successfully dropped, take out the drop joint and the oil pipe above the drop joint;
[0038] 4) Lower...
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