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Apparatus for controlling polymer molecular weight and flow of multiple-layer separate filling into with polymer displacement

A flow control device and polymer technology, which is applied in wellbore/well components, production fluid, earthwork drilling and production, etc. It can solve the problems of difficult control of injection pressure, inability to inject polymers with different substances and pressures, and complex structure of downhole strings, etc. question

Active Publication Date: 2005-03-23
PETROCHINA CO LTD +1
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  • Summary
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Problems solved by technology

The invention solves the problem of adjusting the injection volume of the polymer in layered injection in the prior art, the injection pressure of each layer section is not easy to control, and the structure of the downhole pipe string is relatively complicated, so it is impossible to inject the polymer in different substances and pressures, which affects the quality of the polymer. Disadvantages of oil displacement effect

Method used

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  • Apparatus for controlling polymer molecular weight and flow of multiple-layer separate filling into with polymer displacement
  • Apparatus for controlling polymer molecular weight and flow of multiple-layer separate filling into with polymer displacement
  • Apparatus for controlling polymer molecular weight and flow of multiple-layer separate filling into with polymer displacement

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specific Embodiment approach 1

[0005] Specific implementation mode one: (see Figure 1-Figure 3 ) The present invention consists of an eccentric polymer injection device 10, a molecular weight regulator 30 and a pressure regulator 50. The eccentric polymer injection device 10 consists of an upper joint 1, an eccentric main body 2, a guide body 3, a lower joint 4, an eccentric tube 5, and an upper plug 6. The lower plug 7 is composed of the upper joint 1 and the upper end of the eccentric main body 2, the lower joint 4 is screwed with the lower end of the eccentric main body 2, the guide body 3 is arranged on the lower side of the eccentric main body 2, the upper plug 6 and the The upper end of the eccentric tube 5 is fixedly connected, and the lower end of the eccentric tube 5 is fixedly connected with the lower end of the eccentric tube 5. The eccentric tube 5, the upper plug 6 and the lower plug 7 are fixed on the outside of the eccentric main body 2. A liquid outlet 8, a liquid inlet 9 is opened between ...

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Abstract

The invention is a control device for polymer molecular weight and flow. A eccentric pipe and an upper blocking head and a subjacent head are fixed on the external side of the eccentric main body, the external wall of the eccentric pipe is arranged with a liquid outlet, there has a liquid inlet between the eccentric pipe and eccentric main body, the molecular weight adjustor and pressure adjustor are arranged in the eccentric pipe. The invention solves the troubles of polymer injection quantity adjustment, the injection pressure in each layer is not easy to be controlled, and the underground pile is complex, and the oil removing effect of the polymer is affected. The invention can adjust molecular weight and flow in each layer. The structure is simple.

Description

Technical field: [0001] The invention relates to a downhole molecular weight and flow control device for an oilfield polymer single-tube multi-layer fractional mass partial pressure injection well. Background technique: [0002] The polymer flooding single-pipe 2-3 layer injection technology and the polymer 4-5 layer injection technology are mainly applied in the polymer injection technology. Polymer flooding single-pipe 2-3 layer injection technology is suitable for 2-3 layer polymer injection. Single pump and single pipe are used for liquid supply on the ground, and the downhole string adopts the form of single pipe concentric injection. By adjusting the length of the choke core, the choke pressure can be changed, the injection pressure of each layer can be controlled, and the injection volume can be adjusted to realize layered injection. The single-pipe 4-5-layer separate injection technology for polymer flooding is suitable for multi-layer polymer separate injection. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
Inventor 段宏梁福民裴晓含张书进杨万有
Owner PETROCHINA CO LTD
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