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Lifting device and operating method for hydraulically driven reciprocating pumps in offshore oilfields

A hydraulic drive, offshore oil field technology, applied in the components of pumping devices for elastic fluids, liquid fuel engines, pumps, etc., can solve the problem of inability to realize the operation of unmoved pipe strings, fishing and inspection of pumps, and differences in production pipe strings. The problems of large displacement and limited displacement range can improve the efficiency of pump inspection, reliable performance and simple structure.

Active Publication Date: 2022-05-06
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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  • Lifting device and operating method for hydraulically driven reciprocating pumps in offshore oilfields
  • Lifting device and operating method for hydraulically driven reciprocating pumps in offshore oilfields
  • Lifting device and operating method for hydraulically driven reciprocating pumps in offshore oilfields

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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 a lifting device for a hydraulically driven reciprocating pump in an offshore oil field and an operating method thereof. The device includes a production oil pipe, a coiled tubing and a hydraulically driven reciprocating pump. It is suitable for the lifting of highly deviated wells and horizontal wells in offshore oilfields, which can improve the timeliness of pump inspection operations, reduce the operating cost of moving string pump inspections, improve the development efficiency of offshore oilfields, and provide new lifting technology solutions for oil well lifting in offshore oilfields .

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 Patents(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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