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Steam injection and oil extraction integrated lifting device for offshore heavy-oil thermal production well and operation method of steam injection and oil extraction integrated lifting device

A lifting device, a technology for thermal recovery of heavy oil, which is applied to the components of a pumping device for elastic fluid, production fluid, and earth-moving drilling, etc. Solving problems such as cold damage of oil layer, to achieve the effect of improving development efficiency, reducing operating costs, and increasing peak oil production period

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

[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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  • Steam injection and oil extraction integrated lifting device for offshore heavy-oil thermal production well and operation method of steam injection and oil extraction integrated lifting device

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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 a steam injection and oil extraction integrated lifting device for an offshore heavy-oil thermal production well and an operation method of the steam injection and oil extraction integrated lifting device. According to the device, a ground high-pressure pump is used for conveying power to the underground through a high-pressure power pipeline, and a hydraulic driving cylinder and a steam injection and oil extraction integrated pump are driven to do reciprocating motion and complete up-down stroke motion. Downhole tools of the device are all made of all-metal materials and have the advantage of being resistant to high temperature. The method achieves steam injection, soaking, blowout and lifting production through an integrative string, integration of steam injectionand production is achieved, and cold damage of well washing and pressing to an oil layer is avoided. The device is suitable for lifting of an offshore highly-deviated well and a water well (the welldeviation angle is 0-90 degrees), the operation cost of offshore pump inspection operation by moving strings is reduced, thermal recovery and development benefits of heavy oil are improved, and the device has the technical advantages of safety, reliability and the like in the heavy oil thermal production well lifting aspect.

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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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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