Layered process string

A technology of process pipe strings and screens, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problems that the separate production technology cannot meet the production needs, cannot be carried out smoothly, and interferes with the production of oil wells. The effects of improving single well production and production timeliness, reasonable structure design, and avoiding interlayer interference

Active Publication Date: 2017-10-24
DRILLING TECH DEV CO LTD OF TIANJIN DAGANG OILFIELD PETROLEUM ENG INST +2
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Problems solved by technology

[0003] In order to overcome the problems that the oil production of existing oil wells with serious interlayer interference cannot be carried out smoothly, and the existing separate recovery technology cannot meet the needs of production, the present invention provides a layered process string

Method used

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  • Layered process string

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Embodiment Construction

[0008] The present invention will be further described below with reference to the drawings and embodiments. However, those skilled in the art should know that the present invention is not limited to the specific embodiments listed, as long as it conforms to the spirit of the present invention, it should be included in the protection scope of the present invention.

[0009] See attached figure 1 . The layered process pipe string of the present invention includes a packer, a safety joint, a screen, a plug, a tubing, a packer I1, a safety joint I2, a screen I3, a sealing mandrel I4, a safety joint II5, and a packer II6 , The safety joint Ⅲ 7, the sealing mandrel Ⅱ 8, the screen pipe Ⅱ 9, and the plug 10 are fixedly connected through the oil pipe from top to bottom. Packer I1 is located above the upper oil layer 11, and packer II6 is located between the upper oil layer 11 and the lower oil layer 12, and two packers isolate the upper and lower oil layers. The screen Ⅰ3 is located ...

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Abstract

Disclosed is a layering process pipe string. In order to overcome the shortcoming that an existing oil well with serious interlayer interference enables oil production not to be smoothly carried out, and an existing separate production technology cannot meet the production needs, a packer I, a safety joint I, a screen pipe I, a sealing working cylinder I, a safety joint II, a packer II, a safety joint III, a sealing working cylinder II, a screen pipe II and a pipe plug are sequentially and fixedly connected from top to bottom through oil pipes; the packer I is arranged above an upper oil layer, and the packer II is arranged between the upper oil layer and a lower oil layer; the screen pipe I is arranged on the upper oil layer, and the screen pipe II is arranged on the lower oil layer; and the inner diameter of the sealing working cylinder I and the inner diameter of the sealing working cylinder II are smaller than the inner diameter of the oil pipes. The layering process pipe string has the beneficial effects that the structural design is reasonable, the pipe string is matched with lifting pipe strings of different types so as to avoid interlayer interference, and per-well production and the production limitation are effectively improved.

Description

Technical field [0001] The invention relates to a crude oil production and extraction pipe string, in particular to a stratified process pipe string. Background technique [0002] The geological structure of the oil field is complex, and most blocks have problems such as long production intervals, multiple layers, high reservoir variation coefficient, and high comprehensive water cut, which make interlayer interference serious and difficult to extract crude oil, which makes oil production unable to proceed smoothly. At present, there is an urgent need for a process technology that can effectively produce oil layers, avoid interlayer interference, fully excavate oil well productivity, increase oil well production, and improve development timeliness. Summary of the invention [0003] In order to overcome the inability of the existing oil wells with severe inter-layer interference that the oil production cannot be carried out smoothly, and the existing separate production technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/14
CPCE21B43/14
Inventor 李志广李风涛闫永维李川张子佳尹瑞新李海霞金华
Owner DRILLING TECH DEV CO LTD OF TIANJIN DAGANG OILFIELD PETROLEUM ENG INST
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