Suspended type oil submersible direct drive screw pump oil extraction device

A technology of oil extraction device and screw pump, which is applied to pump devices, components of pumping devices for elastic fluids, non-displacement pumps, etc., can solve the problems of complicated lifting and lowering operation procedures, high labor intensity, and easy wear of cables. , to achieve the effect of low safety and environmental protection risk, high degree of automation, and easy card release

Inactive Publication Date: 2016-04-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of easy wear and tear of cables, easy sticking of drilling tools, high safety risks, complex lifting and lowering operation procedures, low efficiency and high labor intensity during the downhole process

Method used

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  • Suspended type oil submersible direct drive screw pump oil extraction device
  • Suspended type oil submersible direct drive screw pump oil extraction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In order to overcome the problems that cables are easy to wear, drill tools are easy to get stuck, high safety risks, complex tripping procedures, low efficiency, and high labor intensity during the downhole process, this embodiment provides a method such as figure 1 with figure 2 The suspended oil submersible direct drive screw pump oil production device shown includes a screw pump 1 and a submersible motor 2, the screw pump 1 and the submersible motor 2 are fixed by welding, and the screw 3 of the screw pump extends into the inside of the submersible motor 2 , the submersible motor 2 includes a motor casing 4, a motor stator 5, and a motor rotor 6, the upper end of the motor casing 4 is connected with a steel wire rope 7 and a cable 13, and the inside is a motor stator 5 and a motor rotor 6, and the inside of the motor rotor 6 is A bushing 9 is connected via a connecting piece 8 .

[0021] The operating principle of this suspended submersible direct drive screw pump...

Embodiment 2

[0025] On the basis of embodiment 1, this embodiment provides a kind of figure 1 In the suspension type submersible direct-drive screw pump oil production device shown, the submersible motor 2 is covered with a packer 10 , and the packer 10 is covered with a casing 11 . The packer 10 has double sealing and anti-jamming functions, and a casing 11 is sheathed outside the packer 10, which solves the problems that the cable is easy to wear and the drilling tool is easy to get stuck during the downhole process.

[0026] Further, the lower end of the submersible motor 2 is connected with a supporting slip 12 . The supporting slip 12 has a high load capacity, is easy to operate, and is easy to release. It can be suspended and seated by lifting up and down. When the device is lowered underground, the supporting slip 12 has a supporting function to protect the motor.

Embodiment 3

[0028] On the basis of embodiment 2, this embodiment provides a kind of figure 1 In the suspension-type submersible direct-drive screw pump oil extraction device shown, the steel wire rope 7 is obtained by compacting the multi-strand wire contacting the round-strand steel core steel wire rope. The steel wire rope 7 has the characteristics of high rigidity, high elastic modulus, good impact resistance, good wear resistance, stable structure, etc., which ensures safety and reliability in the lifting and lowering operation process.

[0029] The bushing 9 is made of rubber. There is certain friction between the bush and the screw rod 3 during the rotation process, and the bush made of rubber is used to reduce friction and protect the screw rod.

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Abstract

The invention provides a suspended type oil submersible direct drive screw pump oil extraction device which comprises a screw pump and an oil submersible motor, wherein the screw pump is fixed to the oil submersible motor through welding; the screw of the screw pump stretches into the oil submersible motor; the oil submersible motor comprises a motor shell, a motor stator and a motor rotor; the upper end of the motor shell is connected with a steel wire rope; the motor stator and the motor rotor are arranged in the motor shell; and the interior of the motor rotor is connected with a bushing through a connecting piece. According to the device, an oil submersible motor-screw pump integrated device is adopted, the structure is simpler, the cost is lower, and the problems that during the downhole process, a cable is liable to abrasion, a drilling tool is liable to blocking, the rountrip procedure is complex, the efficiency is relatively low, and the labor intensity is relatively high are solved.

Description

technical field [0001] The invention relates to the research field of oil well mechanical oil extraction equipment, in particular to a suspended oil submersible direct drive screw pump oil extraction device. Background technique [0002] The rodless oil production technology of submersible direct drive screw pump can improve the system efficiency from the source, and fundamentally eliminate the eccentric wear of the rod and tube. At present, the working principle of submersible direct-drive screw pumps in oil field research and testing is mostly that the submersible motor is powered through the cable, the motor drives the screw pump to rotate, and the screw pump rotor pushes the crude oil from the input end of the pump to the output end and lifts it to the ground. However, judging from the application effect of major domestic oilfields, this technology still has some shortcomings in reliability, which limits its promotion scale: First, the maximum outer diameter of submersib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/10F04D3/02F04D29/02E21B43/00
CPCF04D13/10E21B43/00F04D3/02F04D13/086F04D29/026
Inventor 刘天宇甘庆明李佰涛张磊杨海涛魏韦呼苏娟庞洁
Owner PETROCHINA CO LTD
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