Ball-throwing type layered sand control process pipe column and method thereof

A process pipe string and ball-throwing technology, which is used in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of high implementation risk, complex pipe string structure, and complicated implementation process, so as to ensure the safety of well control. , Reduce the construction process, the effect of simple operation

Active Publication Date: 2018-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The overall string structure is complex and the implementation process is relatively cumbersome, and the implementation risk is relatively high

Method used

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  • Ball-throwing type layered sand control process pipe column and method thereof
  • Ball-throwing type layered sand control process pipe column and method thereof
  • Ball-throwing type layered sand control process pipe column and method thereof

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Embodiment Construction

[0036] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.

[0037] according to figure 1 as well as Figure 2 to Figure 11 , the ball-pitching layered sand control process string, mainly consists of two layers of sand control outer pipe and sand control inner pipe, the sand control outer pipe is mainly composed of top hanging setting mechanism 1, backwashing device 16, outer filling device 23, and upper screen pipe 27. The interlayer isolation device 29 and the plug 39 are composed; the inner pipe string is mainly composed of the hand release mechanism 40, the inner well flushing valve 54, the setting slider opening device 56, the switch mechanism 63, the upper inner filling device 46, and the stratified Unit slider device 47, steel ball 49 and bottom positioning device 59 f...

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Abstract

The invention discloses a ball-throwing type layered sand control process pipe column and a method thereof. The pipe column comprises a sand control outer pipe and a sand control inner pipe placed inside the sand control outer pipe, wherein the sand control outer pipe comprises a top suspension setting mechanism, a reverse well-flushing device, external filling devices, screen tubes and a pipe plug from top to bottom, and the top suspension setting mechanism, the reverse well-flushing device, the external filling devices, the screen tubes and the pipe plug are connected in sequence. The sand control inner tube includes a releasing mechanism, inner filling devices, a switch mechanism and a bottom positioning device from top to bottom, wherein the releasing mechanism, the inner filling devices, the switch mechanism and the bottom positioning device are connected in sequence. The number of the inner filling devices is consistent with that of the external filling devices in each oil reservoir, and the inner filling devices and the external filling devices correspond to each other in the radial direction. Internal well-flushing valves are installed between every two inner filling devices. The ball-throwing type layered sand control process pipe column and the method thereof can realize completion of layered sand control construction of a multiple zone by one-trip pipe column, ensureindependence between layers, and give full play to the productivity of each small layer to achieve the best sand control production effect.

Description

technical field [0001] The invention relates to a pipe string for downhole oil exploitation operations, in particular to a ball-throwing type layered sand control pipe string and a method thereof. Background technique [0002] Unconsolidated sandstone multi-thin-layer heavy oil reservoirs have the characteristics of thick oil, multiple layers, large interlayer span, strong heterogeneity, and low permeability. Due to the production advantage, it is impossible to carry out targeted transformation and sand control construction on the entire formation. Compared with the general sand control technology, the current layered sand control technology can realize the segmented sand control of multiple layers in one trip, and ensure that each segment is independent of each other. Sliding to the construction position brings great inconvenience and safety risks; in order to ensure that the position of the inner pipe string is accurate after sliding, it is necessary to design a positioni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/14E21B43/02E21B21/00
CPCE21B21/00E21B43/02E21B43/14Y02E10/10
Inventor 王增林张全胜谢金川李常友陈刚马丁王东魏庆彩张锡娟高雪峰
Owner CHINA PETROLEUM & CHEM CORP
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