Production string optimization device for oil well in case of electric submersible pump gas-locking

A technology for producing pipe strings and optimizing devices, which is applied to valve devices, drilling pipes, casings, etc. Increased effect of ground control and booster equipment

CN103573194AInactive Publication Date: 2014-02-12CHINA NAT OFFSHORE OIL CORP +1
7 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-02-12
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

A production string optimization device for an oil well in case of electric submersible pump gas-locking comprises a production casing, an electric submersible pump unit, an oil pipe, a packer, a gas exhaust valve, a small-diameter continuous oil pipe, a gas lift valve, a sliding sleeve, a subsurface safety valve, a Y-shaped tool, a working barrel plug and a pump outlet one-way valve, wherein the oil pipe is mounted in the production casing; the working barrel plug is mounted at the lower part of the oil pipe; the Y-shaped tool is mounted at the upper end of the working barrel plug; the pump outlet one-way valve is mounted at one end of the Y-shaped tool and connected with the electric submersible pump unit; the packer is mounted at the upper end of the Y-shaped tool; the sliding sleeve is mounted in a position of the oil pipe between the packer and the subsurface safety valve; the gas exhaust valve is mounted at one end of the packer and connected with the gas lift valve mounted at the upper part of the oil pipe through the small-diameter continuous oil pipe; and the gas lift valve is mounted at the lower end of the subsurface safety valve at the upper part of the oil pipe. According to the device, an original production Christmas tree is not required to be replaced, and under the condition that neither ground control equipment nor supercharging equipment is increased, gas lift production can be maintained for a long time, and gas locking can be effectively restrained.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of electric submersible pump oil production, in particular to an optimization device for production pipe strings of electric submersible pump airlock oil wells. Background technique

[0002] Electric submersible pump oil production is one of the commonly used lifting methods in offshore oil fields at present, and has the advantages of large displacement and high head. However, its single lifting method is subject to the characteristics of multistage centrifugal pumps that are sensitive to free gas, and often shows certain limitations. As usual, due to the free gas entering the pump body, the working condition of the electric submersible pump is unstable, and even the air lock of the electric submersible pump stops discharging. The free gas entering the electric submersible pump has a great influence on the performance and life of the electric submersible pump. The more free gas enters the pump, the worse the pump per...

Examples

Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0013] Such as figure 1 As shown, the production string optimization device for electric submersible pump airlock oil well includes production casing 1, electric submersible pump unit 2, tubing 3, packer 4, air release valve 5, small-diameter coiled tubing 6, and gas lift valve 7 , sliding sleeve 8, downhole safety valve 9, Y-type tool 10, working cylinder plug 11, pump outlet check valve 12, wherein, the oil pipe 3 is installed inside the production casing 1, and the lower part of the oil pipe 3 is equipped with a working cylinder Plug 11, a Y-shaped tool 10 is installed on the upper end of the working cylinder plug 11, and a pump outlet check valve 12 is installed on one end of the Y-shaped tool 10. The pump outlet check valve 12 is connected with the electric submersible pump unit 2, and the Y- A packer 4 is installed on the upper end of the type...