CN201496051U

CN201496051U - Relay lifting device for viscous oil dilution well

Info

Publication number: CN201496051U
Application number: CN2009200044381U
Authority: CN
Inventors: 王世洁; 赵普春; 李海军; 李柏林; 刘伏军; 李兆军; 涂兴万
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co; Sinopec Baling Co
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-06-02
Anticipated expiration: 2019-08-25

Abstract

The utility model relates to a relay lifting device for a viscous oil dilution well. In order to solve the problems such as the contradiction existing between the depth and the discharge of a submerged pump of a viscous oil recovery well, overload stop caused by viscous oil, viscous oil up-return caused by unstable and insufficient dilution, motor burning and pump shaft breakage caused by pump sticking and the like, an over-cable packer is connected with the upper part of an electric submersible pump in a lifting device through variable wires and fully separates diluted liquids from liquids generated in an underlying formation. Therefore, the formation with severe energy shortage caused by liquid column pressure generated by the diluted liquids has no liquid, the energy transfer is realized through relay lifting, the production pressure difference of the formation is increased, the deep-pumping problem of a viscous oil well is better solved, and the requirement for the discharge and the viscosity reduction of viscous oil is met.

Description

Viscous crude is mixed wide-spaced well relay lifting device

Technical field

The utility model relates to a kind of mechanical oil recovery and takes out technology deeply, and particularly a kind of viscous crude that is applied in is mixed rare machine and taken out production aspect relay lifting modifying device.

Background technology

Existing deep-well oil-extraction technology early has application for the relay lifting, and as shown in Figure 1, it utilizes into depth well pump 105 (electric submersible pump) well liquid is extracted into an accumulator 100, by oil well pump 101 the well liquid in the accumulator is extracted out then, forms the relay lifting.

This lifting device can make co-ordination between sucker rod pump and the electric pump, efficiently solves the technical barrier that the single artificial lifting way of ultradeep well exists.But this lifting device can only be applied to the relay lifting of thin oil well.

Exist contradiction between the following pump degree of depth of viscous crude machine-pumped oil well and the discharge capacity, because the restriction of ground lifting equipment load, the big pump of discharge capacity can't descend dark, and the less pump of discharge capacity can't satisfy the production of mixing rare heavy oil wells again.In addition electric pump production shut down because of overload appears in the thick regular meeting of oil, because of light oil mixing amount unstable or cause inadequately returning on the viscous crude, the pump card burns motor and phenomenon such as the disconnected pump shaft of card, causes electric pump well inspection pumping frequency numerous, not only influence the oil well production timeliness but also increased operating cost.

The utility model content

Lifting device described in the utility model has overcome the compound Lifting Technique of thin oil well and has been applied to viscous crude and mixes the drawback of wide-spaced well in producing, and mixes dilute liquid and can not cause because of stratum negative pressure problem such as fluid not.This device is fully in conjunction with the sticking warm field distribution characteristics of heavy oil wells, use cable-passing packer to set at the sticking warm flex point place of crude oil, the viscous crude (viscosity is in the scope of application of electric submersible pump) of realizing the packer bottom directly uses the electric submersible pump machine to take out, be lifted to the crude oil flex point place degree of depth, top is used the common suction pump machine cooperation of big discharge capacity to mix rare machine and is taken out, and takes over the purpose of producing and mixing rare viscosity reduction up and down continuously to realize it.By packer will go up mix dilute liquid and the sub-surface production fluid fully separates, avoid mixing stratum that head of liquid that dilute liquid produces causes the energy wretched insufficiency not fluid and the transmission by relay lifting realization energy, increased the producing pressure differential on stratum, and solved the viscous crude well depth well and take out problem, and satisfy discharge capacity and reducing thick oil viscosity requirement.

Relay lifting device of the present utility model comprises: electric submersible pump, oil pipe, cable, oil well pump and pump barrel is characterized in that, also comprise a cable-passing packer, it sets by directly pressing down, and screwed connection is above electric submersible pump, and cable is tightly connected by screw thread and cable-passing packer.

Cable-passing packer maximum outside diameter: 210mm wherein, heatproof: 120 ℃, operting differential pressure: 11MPa.

The structure of cable-passing packer is an annulus, and circle ring inner wall is with oil pipe or pump barrel screwed connection up and down and communicate, and annulus outer wall and oil well casing offset, and the cavity between tubing string and the oil well casing is separated, and thin oil are blocked in the top of packer.

Preferably, can also comprise screen casing, it is positioned at the oil well pump below, the cable-passing packer top.

The effect of screen casing is to make the mixing of viscous crude and thin oil better fully.

Description of drawings

Fig. 1 is a deep-well Lifting Technique schematic diagram of the prior art;

Fig. 2 mixes wide-spaced well relay lifting device schematic diagram for viscous crude of the present utility model.

The specific embodiment

Fig. 1 is a deep-well Lifting Technique schematic diagram of the prior art, and wherein label 101 is represented oil well pump, and label 102 is represented cable, and label 103 is represented gas and oil separating plant, and label 104 is represented the electric pump intake, and label 105 is represented electric submersible pump.

As shown in Figure 2, viscous crude is mixed wide-spaced well relay lifting device and is formed tubular column structure by electric submersible pump 105, first oil pipe 203, cable-passing packer 108, second oil pipe 202, screen casing 107, the 3rd oil pipe 201, pump barrel 106 from bottom to top, and oil well pump 101 is positioned at pump barrel 106.Wherein the cable-passing packer 108 and first oil pipe 203 and second oil pipe 202 adopt screwed connection respectively.

Electric submersible pump is used in the tubular column structure bottom, and big discharge capacity sucker rod pump is used on top, and the cable packer is separated pit shaft, has successfully solved rare problem of mixing on the oil well pump, has also solved the difficult problem of pit shaft lifting of the heavy oil wells of feed flow deficiency simultaneously.

Claims

1. a viscous crude is mixed wide-spaced well relay lifting device, comprising: electric submersible pump, and oil pipe, cable, oil well pump and pump barrel is characterized in that, also comprise a cable-passing packer, and it is positioned at the top of electric submersible pump, and cable and cable-passing packer are tightly connected.

2. relay lifting device as claimed in claim 1 is characterized in that, also comprises screen casing, and it is positioned at the oil well pump below, the cable-passing packer top.

3. relay lifting device as claimed in claim 1 is characterized in that, described cable-passing packer and up and down between the oil pipe by screwed connection.