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A casing penetrating hole wall coring tool

A technology of passing casing and well wall, used in casing, drill pipe, directional drilling, etc., to achieve the effect of high coring yield, simple coring construction and strong formation adaptability

Active Publication Date: 2020-08-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are no reports and applications of coring technology by penetrating the casing after well completion at home and abroad.

Method used

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  • A casing penetrating hole wall coring tool
  • A casing penetrating hole wall coring tool
  • A casing penetrating hole wall coring tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 As shown, a casing penetrating borehole wall coring tool includes a radial horizontal drilling guide mechanism; it also includes a casing window opening mechanism and a coring mechanism, and the radial horizontal drilling guide mechanism includes a hydraulic anchor 1 and a guide 4, the lower end of the hydraulic anchor 1 is connected to the guide 4 through the upper joint 2, and a sealing seat is designed on the inner wall of the upper joint 2 to provide a seal for the pressure of the oil pipe. A pusher 5 and a centralizing mechanism 6 are arranged on the side wall of the lower end of the guide 4, and the hydraulic anchor 1 can anchor the radial horizontal drilling guide mechanism on the inner wall of the casing 3. The connected track with curvature provides guiding function for the windowing universal joint 8 and the coring universal joint 10 . The pusher 5 can push the guider 4 so that t...

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Abstract

The invention relates to the technical field of through casting coring of an oil field production well, in particular to a through casting side wall penetrating coring tool. The Through casting side wall penetrating coring tool comprises a radial horizontal drilling guide mechanism, and further comprises a casing windowing mechanism and a coring mechanism. The radial horizontal drilling guide mechanism comprises a hydraulic anchor and a guider, the lower end of the hydraulic anchor is connected with the guider through an upper connector, a sealing base is designed on the inner wall of the upper connector, and a sidewall contact device and a straightening mechanism are arranged on the side wall of the lower end of the guider. The through casting side wall penetrating coring tool can penetrate through a casting for coring work of orientating and deep penetrating, coring construction is easy, convenient, low in cost, safe and reliable, the adaptability to the stratum is high, and the coring yield rate is high. Taken rock cores are regular, lithology and oiliness observation can be visually carried out, lithology, electrical property, physical property and oiliness analysis and tests can be carried out with the help of instruments, the porosity, the permeability and other reservoir parameters are obtained, and the tool has direct guiding significance on reservoir assessment.

Description

Technical field: [0001] The invention relates to the technical field of coring through casing of production wells in oil fields, in particular to a coring tool for penetrating well wall through casing. Background technique: [0002] Radial horizontal drilling technology uses semi-rigid drill pipe and micro-bit rotary drilling to directly drill multiple holes in the oil layer near the wellbore, with a drilling depth of 8-15m. Through technology, it is an effective measure to realize production demand such as increasing production and increasing injection. During the formation drilling process of radial horizontal drilling construction, due to the different lithology of different reservoirs, the lithology and drillability of the formation itself are very different, resulting in uneven drilling footage. In order to increase the ROP of formation drilling and grasp the characteristics of various formations, it is also necessary to perform deep penetration and coring of the forma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00E21B7/04E21B23/01E21B29/06E21B17/10
CPCE21B7/04E21B17/1042E21B17/1078E21B23/01E21B25/00E21B29/06
Inventor 徐涛施连海朱忠伟赵敏韩龙钟富林杨帆刘平全黄志强李磊兵张秋阳张昕冉胡可能朱高磊杨鹏胡君城王瑞吉明艳雷凤亮
Owner BC P INC CHINA NAT PETROLEUM CORP
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