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Hydraulic piston pump, downhole pump unit and downhole drainage testing system

A hydraulic piston and pump unit technology, which is applied in wellbore/well parts, pumps, measurement, etc., can solve the problems of lack of testing function, unfavorable thermal recovery of heavy oil, failure of pump core to realize downhole shut-in, etc., and achieve processing difficulty Small size, reduced production cost, large displacement effect

Pending Publication Date: 2018-08-24
廊坊市华海石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the formation fluid channel is not close to the power fluid channel, which is not conducive to the realization of thermal recovery of heavy oil
[0009] The third is that the pump core itself cannot realize downhole shut-in and does not have the testing function

Method used

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  • Hydraulic piston pump, downhole pump unit and downhole drainage testing system
  • Hydraulic piston pump, downhole pump unit and downhole drainage testing system
  • Hydraulic piston pump, downhole pump unit and downhole drainage testing system

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Embodiment Construction

[0051] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0052] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0053] like figure 1 and figure 2 Shown is a schematic structural diagram of an embodiment of a hydraulic piston pump provided by the present application, including a pump base 21 and a pump core 31 seated in the pump base 21; the pump core 31 of the hydraulic piston pump includes a lower piston...

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Abstract

The invention discloses a hydraulic piston pump, a downhole pump unit and a downhole drainage testing system. The hydraulic piston pump comprises a pump base and a pump core arranged in the pump base,wherein the pump core comprises a lower piston cylinder, an upper piston cylinder, a reversing short nipple located between the upper piston cylinder and the lower piston cylinder, a reversing valve,a hollow connecting rod piston unit and a lower connector fixed at the bottom end of the lower piston cylinder, and a converting connector is installed at the top end of the upper piston cylinder. According to the hydraulic piston pump, the downhole pump unit and the downhole drainage testing system, a power fluid can be separated from a formation fluid, and downhole shut-in and heavy oil heatingcan be achieved.

Description

technical field [0001] The disclosure generally relates to the field of oil well testing and testing technology, and specifically relates to a hydraulic piston pump with hydraulic drive and closed circulation, a downhole pump unit and a downhole drainage testing system. Background technique [0002] At present, in the field of oil and gas well testing and testing technology, hydraulic pumps or screw pumps are often used for formation drainage, and hydraulic pumps mainly include hydraulic jet pumps and hydraulic piston pumps. [0003] At present, the commonly used hydraulic pumps, whether jet pumps or piston pumps, work by putting the pump core in the working string. The working string should at least consist of tubing, pump base and packer from top to bottom. The pump core is sent to the downhole pump seat through the surface pump, and then the pump pressure is increased to drive the downhole pump to work, and the formation fluid and power fluid are returned from the annular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B47/00F04B53/16F04B53/10E21B47/00
CPCE21B47/00F04B47/00F04B53/10F04B53/16
Inventor 赵海库赵雪峰
Owner 廊坊市华海石油技术开发有限公司
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