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Offshore oilfield dropping and fishing hydraulic drive reciprocation pump lifting device and work method thereof

A hydraulic drive, offshore oilfield technology, applied to the components of pumping devices for elastic fluids, liquid fuel engines, pumps, etc., can solve the problem of inability to realize the operation of pulling and inspecting pumps without moving strings, and the difference in production strings Large, can not be used for reference, etc., to achieve the effect of improving the timeliness of pump inspection operations, reliable performance, and improving development benefits

Active Publication Date: 2020-10-13
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicable displacement range of this patent is limited, and it is impossible to realize the operation of pulling and inspecting the pump without moving the string, and the production string of the coalbed methane well and the production string of the offshore oil field are very different, so it cannot be used for reference.

Method used

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  • Offshore oilfield dropping and fishing hydraulic drive reciprocation pump lifting device and work method thereof
  • Offshore oilfield dropping and fishing hydraulic drive reciprocation pump lifting device and work method thereof
  • Offshore oilfield dropping and fishing hydraulic drive reciprocation pump lifting device and work method thereof

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Embodiment

[0041] Such as figure 1 As shown, the string is set in the casing, including production casing 1, cable packer 2, work cylinder 3, temperature and pressure measurement device 4, deep well safety valve 5, production sliding sleeve 6, seating joint 7, Production oil pipe 8, hydraulic control pipeline 9, upper cylinder body 10, driving reciprocating plunger 11, positioning seal 12, lower cylinder body 13, coiled tubing 14, oil drain valve 15, steel pipe cable 16, floating valve 17, fixed valve 18. Top packer 19 and sand control section 20.

[0042] Production casing 1 is provided with production tubing 8, and the annular space between the production tubing 8 and the production casing 1 is provided with a cable-passing packer 2; the cable-passing packer 2 is used to effectively Seal off the oil jacket annular space. The seating joint 7 is located below the cable-passing packer 2 and is used for setting the cable-passing packer 2 .

[0043] The lower part of the production tubin...

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Abstract

The invention discloses an offshore oilfield dropping and fishing hydraulic drive reciprocation pump lifting device and a work method thereof. The device comprises a production oil pipe, a continuouspipe and a hydraulic drive reciprocation pump, stationary string pump detecting can be achieved, the device is suitable for offshore oilfield large-slope well and horizontal well lifting, the pump detecting work aging can be improved, movable string pump detecting work cost is reduced, offshore oilfield development benefits can be improved, and a new lifting technical solution is provided for offshore oilfield oil well lifting.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a hydraulically driven reciprocating pump lifting device and an operating method thereof for throwing and salvageable offshore oilfields. Background technique [0002] The main lifting methods in offshore oilfields include self-injection, electric submersible pumps, gas lift, submersible screw pumps, surface-driven screw pumps and linear motor reciprocating pumps. Among them, the number of wells using the electric submersible pump lifting technology accounts for more than 80%. The electric submersible pump has the advantages of large output range, high pump efficiency and mature technology. For low-production fluid wells (below 50m 3 / d), during the production of electric submersible pumps, it is easy to cause problems such as overheating of the unit, pumping out, and under-load shutdown, etc., resulting in short service life of the electric submersible pump, frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/01E21B43/12F04B47/04F04B53/00
CPCE21B43/01E21B43/129F04B47/04F04B53/00
Inventor 李昂杨万有郑春峰陈来勇张凤辉阮新芳郭秩英沈琼赵景辉尹莎莎王磊
Owner CHINA NAT OFFSHORE OIL CORP
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