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An integrated lifting device for steam injection and oil production in offshore heavy oil thermal recovery wells and its operating method

A lifting device and heavy oil thermal recovery technology, which is applied to components of elastic fluid pumping devices, production fluid, earthwork drilling and production, etc., can solve the problem of high cost of workover operations in two operations, low production timeliness, Solve problems such as oil layer cold damage, achieve the effect of improving development efficiency, reducing operating costs, and increasing peak oil production period

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

[0006] The invention aims to solve the technical problems of low production time efficiency, cold damage to the oil layer, and high cost of workover operations in the process of steam injection and oil recovery in thermal recovery wells of offshore heavy oil oilfields.

Method used

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  • An integrated lifting device for steam injection and oil production in offshore heavy oil thermal recovery wells and its operating method
  • An integrated lifting device for steam injection and oil production in offshore heavy oil thermal recovery wells and its operating method
  • An integrated lifting device for steam injection and oil production in offshore heavy oil thermal recovery wells and its operating method

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Embodiment

[0044] Such as figure 1 As shown, the present invention firstly provides an integrated lifting device for steam injection and oil production in offshore heavy oil thermal recovery wells. 4. Hydraulic control pipeline 5, power pipe 6, heat insulation oil pipe 7, oil drain valve 8, high temperature downhole docking device 9, upper cylinder body 10, reciprocating plunger 11, positioning seal 12, working cylinder 13, swimming valve 14 , lower cylinder body 15, fixed valve 16, steel pipe cable 17, pressure measuring / temperature measuring device 18, high temperature deep well safety valve 19, top packer 20, sand control section 21.

[0045] The inside of the production casing 3 is provided with a heat insulating oil pipe 7, and the annular space between the heat insulating oil pipe 7 and the production casing 3 is installed with a cable packer 1, and the heat insulating oil pipe 7 is provided with a power pipe 6, and the power pipe 6 An oil drain valve 8 and a high-temperature dow...

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Abstract

The invention discloses an integrated lifting device for steam injection and oil production in an offshore heavy oil thermal recovery well and an operation method thereof. The device uses the surface high-pressure pump to transmit power to the underground through the high-pressure power pipeline, drives the hydraulic drive cylinder and the steam injection and oil production integrated pump to reciprocate and complete the up and down stroke movement. The downhole tools of the device are all made of all-metal material, which has the characteristics of high temperature resistance. This method realizes steam injection, soaking well, blowout and lifting production in one trip, realizes the integration of steam injection and production, and can effectively avoid cold damage to oil layers caused by well washing and pressure well, and is suitable for offshore highly deviated wells and water wells Well lifting (well inclination angle 0-90°), reduces the high operating cost of offshore moving string pump inspection operations, improves the development efficiency of heavy oil thermal recovery, and has technical advantages such as safety and reliability in lifting heavy oil thermal recovery wells.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to an integrated steam injection and oil production lifting device for offshore heavy oil thermal recovery wells and an operating method thereof. Background technique [0002] The thermal recovery of offshore heavy oil fields mainly adopts two thermal oil recovery techniques of multi-component thermal fluid and steam huff and puff. The main method is to increase the temperature of the oil layer through heat injection, further reduce the viscosity of the formation crude oil, and improve the fluidity of the formation crude oil. The two thermal injection-production processes of multi-component thermal fluid and steam huff and puff are basically the same in the actual production of offshore oilfields at present, and both of them adopt the method of separating the thermal injection process string and the production process string, that is, the thermal injection process strin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B43/00F04B53/10F04B53/00F04B47/00
CPCE21B43/24E21B43/121F04B53/10F04B53/00F04B47/00
Inventor 郑春峰杨万有崔澎涛吴华晓李昂沈琼张凤辉赵景辉薛德栋缪油花
Owner CHINA NAT OFFSHORE OIL CORP
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