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System for accommodating insert tool

A technology for inserting tools and sub-assemblies, which is used in electrical/magnetic detection, electromagnetic wave detection, and electronic magnetic resonance/nuclear magnetic resonance detection for logging records, etc. Incompatibility, etc.

Inactive Publication Date: 2009-12-02
SCHLUMBERGER OVERSEAS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of the proposed arrangement of the '437 patent is that the sensor is directly exposed to the destructive conditions encountered downhole, requiring an unobstructed path in the drill string for the probe to move, unlike tools that include mud pulse telemetry. or the drill string of the mud motor is not compatible
Small probes protruding through smaller openings are also not available for resistivity logging

Method used

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  • System for accommodating insert tool
  • System for accommodating insert tool
  • System for accommodating insert tool

Examples

Experimental program
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Embodiment Construction

[0058] The device of the present invention comprises two main parts, the insertion tool (RIT) and the pipe sleeve or drill collar. The fittings are referred to below as subassemblies.

[0059] RIT. figure 1 One embodiment of the RIT10 of the present invention is shown. RIT 10 is an elongated, small diameter metal support or mandrel that may include one or more antennas 12, signal source, sensor (where sensor / detector is the term used interchangeably), magnet, gamma rays Detector / generator assembly, neutron generation / detection assembly, various electronic components, battery, downhole data processor, clock, readout port, and log memory (not shown).

[0060] RIT10 is not required to have the same mechanical properties as drill collars. Therefore, its mechanical constraints are significantly reduced. The RIT 10 has a landing mechanism (steering head) 14 at its bottom end and a fishing head 16 at its top end. Fishing head 16 allows RIT 10 to be captured and extracted from wi...

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PUM

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Abstract

A method and system for subsurface logging using an improved tubular having an elongated body including a tubular wall and a central bore for receiving a support. The tubing includes a slotted section to provide a signal channel that can pass through the tubing. The pressure barrier device provides a liquid tight seal at the slotted section. The support is mounted with a signal source or sensor and engageable within the pipe. Tubes and supports may be used in conjunction with retractable and reloadable MWD devices.

Description

technical field [0001] This application is a continuation-in-part of US Patent Application Serial No. 09 / 576,271, filed May 22,2000. [0002] The present invention relates generally to the surveying of subterranean formations, and more particularly to techniques for transmitting and / or receiving signals through metal tubulars using an insertion tool that can be placed within and extracted from the metallic tubular. Embodiments of the present invention are particularly well suited for implementation with extractable and reloadable measurement-while-drilling (MWD) devices. Background technique [0003] Resistivity and gamma ray logging are two of the most commonly used formation evaluation measurements in logging. Such measurements are used to locate and assess the properties of potential hydrocarbon-bearing zones in subterranean formations. Only these two measurements are made in many wells, especially in the surface and midsections of low value wells and higher value wells...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/12G01V8/12E21B23/14E21B47/01E21B47/13G01V3/30G01V3/32
CPCE21B23/14G01V3/32E21B47/122E21B47/011E21B47/01E21B47/017E21B47/13
Inventor D·L·史密斯M·T·弗里
Owner SCHLUMBERGER OVERSEAS SA