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Lithology and density logging instrument

A technology of lithology density and logging instrument, which can be used in wellbore/well components, earthwork drilling, etc., and can solve problems such as difficulty in wiring the thermos bottle

Inactive Publication Date: 2010-11-10
GI TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above problems, the present invention provides a lithology density logging tool, which can solve the problem of high temperature protection inside the probe and the problem of difficult wiring after adding a thermos bottle

Method used

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  • Lithology and density logging instrument
  • Lithology and density logging instrument
  • Lithology and density logging instrument

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Embodiment Construction

[0012] refer to figure 1 , The lithology density logging tool is mainly composed of three parts: a probe 6, an electronic signal processing circuit 4, and a pusher 5. Electronic signal processing circuits are first housed in a metal thermos and then encapsulated in a metal pressure-bearing enclosure. It responds to the command of the surface system 1 through the logging cable 2 and the data transmission sub-section 3, controls the logging tool, realizes effective data collection, high voltage control, threshold adjustment, data transmission and control of the PHA board, and uploads gamma ray energy spectra and other lithological information. The lithology density logging tool can be directly connected to the 5700 surface system. The probe 6 is installed on the pusher 5, and the pusher 5 pushes the probe 6 tightly to the well wall during well logging.

[0013] figure 2 Among them, the internal structure of the thermos bottle is an upper shell 1, a source bin 2, a window 3,...

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Abstract

The invention provides a lithology and density logging instrument, which relates to an instrument for measuring formation lithology and the density. The invention is mainly used for the exploration and the development of petroleum and natural gas. Firstly, a heat insulation bottle base is fixed on a metal case of a probe through screws, then, all elements inside the probe are sequentially ranged and fixed in sequence to be encapsulated in a heat insulation bottle, a circuit inside the heat insulation bottle is connected with a circuit board through a multi-core cable, at the same time, an electric wire led out from the multi-core cable is led to the upper end of the probe through a groove arranged on the inner side of the probe case to be connected with an electronic signal processing circuit, and the communication of the whole control circuit is realized.

Description

(1) Technical field [0001] The invention relates to an instrument for measuring formation lithology and density, which is mainly used in the exploration and development of oil and natural gas. (two), background technology [0002] At present, the lithology density logging tool used for petroleum logging first uses isotopes to radiate gamma rays to the formation, and then uses detectors to measure the intensity of gamma rays scattered and absorbed by the formation. Then, according to the photoelectric absorption of the Compton-Wu trained scattering gamma ray and the formation interaction and the Compton-Wu trained effect, the rock properties and rock density of the formation are simultaneously determined. However, due to the harsh drilling environment, logging tools usually work under high temperature and high pressure conditions. At present, on all density logging tools at home and abroad, only the electronic signal processing circuit is packed into a metal thermos bottle, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 高怀雪黄文帜
Owner GI TECH (BEIJING) CO LTD
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