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Downhole Electromagnetic Telemetry Device

A drilling and electrical isolation technology, applied in the direction of measurement, drilling equipment, borehole/well components, etc.

Active Publication Date: 2018-05-08
EVOLUTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although systems have been developed for subsurface telemetry, there is still a need for practical subsurface telemetry systems and there remains a need for systems that provide improved efficiency and / or greater range

Method used

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  • Downhole Electromagnetic Telemetry Device
  • Downhole Electromagnetic Telemetry Device
  • Downhole Electromagnetic Telemetry Device

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Embodiment Construction

[0027] Throughout the following description, specific details are set forth in order to provide a thorough understanding to those skilled in the art. However, known elements may not have been shown or described in detail to avoid unnecessarily obscuring the present disclosure. The following descriptions of examples of the present technology are not intended to be exhaustive or to limit the systems to the precise form of any example implementation. Accordingly, the description and drawings are to be regarded in an illustrative rather than a restrictive sense.

[0028] Although some exemplary aspects and implementations have been discussed above, those skilled in the art will recognize modifications, permutations, additions, and subcombinations thereof. Accordingly, it is intended that the following appended claims and claims introduced thereafter be interpreted to embrace all such modifications, permutations, additions and subcombinations within their true spirit and scope.

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Abstract

An assembly for use in subterranean drilling comprising a downhole probe having an EM telemetry signal generator and first and second insulating nipples for transmitting telemetry signals from the EM telemetry signal generator into a drill string Two-part electrical contacts. The outside surface of the probe tube and the inside surface of the insulating sub are covered by a layer of electrically insulating material. The conductive path inside the insulating sub is removed, improving the efficiency of EM telemetry.

Description

[0001] References to related applications [0002] This application claims priority to US Application No. 61 / 723,286, filed November 6, 2012. For the United States, this application claims the benefit of U.S. Application No. 61 / 723,286, filed November 6, 2012, and entitled DOWNHOLEELECTROMAGNETIC TELEMETRY APPARATUS under 35 U.S.C § 119, for all purposes The contents thereof are incorporated herein by reference. technical field [0003] This application relates to subterranean drilling, and in particular to devices for telemetry of information from downhole locations. Embodiments are applicable to drilling wells to obtain hydrocarbons. Background technique [0004] Obtaining hydrocarbons from subterranean regions relies on the process of drilling a wellbore. [0005] The wellbore is formed using surface-located drilling equipment that drives a drill string from which the drill string ultimately extends to the formation or subterranean region of interest. Drill strings ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/13
CPCE21B17/003E21B47/13E21B47/01
Inventor 阿伦·W·洛根帕特里克·R·德尔卡茨贾斯廷·C·洛根大卫·A·斯维策尔继利(杰里)·刘穆杰塔巴·卡齐米米拉基
Owner EVOLUTION ENG