Huff-and-puff oil production device with submersible directly-driven screw pump
A technology of oil production device and screw pump, which is applied to the valve device of wellbore/well, production fluid, earth-moving drilling, etc. Period, the effect of simple operation process
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Embodiment 1
[0019] see figure 2 and image 3 , the present invention provides a submersible direct drive screw pump huff and puff oil production device, including an automatic downhole water injection switch 6 used to switch between water injection and oil production channels and a submersible direct drive screw pump; wherein the upper end of the downhole automatic water injection switch 6 is liquid Port 9 is connected to oil pipe 4, and its lower end liquid inlet 10 is connected to the oil outlet of the upper end of the submersible direct-drive screw pump through oil pipe 4; said submersible direct-drive screw pump includes a screw pump coaxially connected from top to bottom 7. Flexible shaft 18, upper protector 19, lower protector 20, submersible motor 8 and centralizer 21; the upper end of the screw pump 7 is connected to the lower end of the downhole automatic water injection switch 6; the screw pump 7 and the submersible motor 8 are respectively Electric connection leads to the sub...
Embodiment 2
[0022] On the basis of Embodiment 1, the downhole automatic water injection switch 6 includes four functional components of downhole power supply, control circuit, drive motor and mechanical switch located in its working cylinder 11; Connection, the control circuit is electrically connected with the driving motor; the control circuit mainly controls the rotation direction of the motor to realize the conversion of the "water injection-oil recovery" process. The downhole power supply adopts high-temperature lithium battery, and the ambient temperature range is -20oC~+150oC, which can realize high-current continuous discharge and high-pulse current discharge.
[0023] Such as figure 1 As shown, the mechanical switch includes a bridge channel 12, a lower piston cylinder 13, an upper piston cylinder 14, a piston 15 and a pressure gauge 16, wherein the upper piston cylinder 14 and the lower piston cylinder 13 are located in the working cylinder 11, and the upper piston cylinder 14 ...
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