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Title: Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole

Abstract

A system is described for measuring depth from the mouth of a borehole to a well logging tool connected to one end of an electrically conductive cable suspended in the borehole comprising: means for applying an initial electrical time pulse signal to one end of the cable, whereby the initial electrical time pulse signal propagates the length of the cable to one end of the cable to the well logging tool connected to the other end of the cable; means for detecting at the mouth of the borehole, which is intermediate both ends of the cable, the passage of the initial electrical time pulse signal along the length of the cable; means for detecting at the mouth of the borehole a subsequent electrical time pulse propagating along the length of the cable reflected from the other end of the cable; means for determining a time interval between the detection of the initial electrical time pulse signal at the mouth of the borehole and the detection of the subsequent electrical time pulse signal at the mouth of the borehole; and means for correlating the time interval with the depth to which the well logging tool is suspended in the borehole asmore » measured from the mouth of the borehole.« less

Inventors:
Publication Date:
OSTI Identifier:
5435293
Patent Number(s):
US 4597183
Assignee:
Standard Oil Co., Chicago, IL
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 24 Feb 1983
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; PETROLEUM DEPOSITS; WELL LOGGING; WELL LOGGING EQUIPMENT; ELECTRIC CABLES; BOREHOLES; DEPTH; LENGTH; PULSES; SIGNALS; TIMING PROPERTIES; CABLES; CAVITIES; CONDUCTOR DEVICES; DIMENSIONS; ELECTRICAL EQUIPMENT; EQUIPMENT; GEOLOGIC DEPOSITS; MINERAL RESOURCES; RESOURCES; 020200* - Petroleum- Reserves, Geology, & Exploration

Citation Formats

Broding, R A. Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole. United States: N. p., 1986. Web.
Broding, R A. Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole. United States.
Broding, R A. 1986. "Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole". United States.
@article{osti_5435293,
title = {Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole},
author = {Broding, R A},
abstractNote = {A system is described for measuring depth from the mouth of a borehole to a well logging tool connected to one end of an electrically conductive cable suspended in the borehole comprising: means for applying an initial electrical time pulse signal to one end of the cable, whereby the initial electrical time pulse signal propagates the length of the cable to one end of the cable to the well logging tool connected to the other end of the cable; means for detecting at the mouth of the borehole, which is intermediate both ends of the cable, the passage of the initial electrical time pulse signal along the length of the cable; means for detecting at the mouth of the borehole a subsequent electrical time pulse propagating along the length of the cable reflected from the other end of the cable; means for determining a time interval between the detection of the initial electrical time pulse signal at the mouth of the borehole and the detection of the subsequent electrical time pulse signal at the mouth of the borehole; and means for correlating the time interval with the depth to which the well logging tool is suspended in the borehole as measured from the mouth of the borehole.},
doi = {},
url = {https://www.osti.gov/biblio/5435293}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 1986},
month = {Tue Jul 01 00:00:00 EDT 1986}
}