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Title: While drilling system and method

Abstract

A while drilling system and method for determining downhole parameters is provided. The system includes a retrievable while drilling tool positionable in a downhole drilling tool, a sensor chassis and at least one sensor. The while drilling tool is positionable in the downhole drilling tool and has a first communication coupler at an end thereof. The sensor chassis is supported in the drilling tool. The sensor chassis has a second communication coupler at an end thereof for operative connection with the first communication coupler. The sensor is positioned in the chassis and is adapted to measure internal and/or external parameters of the drilling tool. The sensor is operatively connected to the while drilling tool via the communication coupler for communication therebetween. The sensor may be positioned in the while drilling tool and retrievable with the drilling tool. Preferably, the system is operable in high temperature and high pressure conditions.

Inventors:
; ;
Publication Date:
Research Org.:
Schlumberger Technology Corporation
Sponsoring Org.:
USDOE
OSTI Identifier:
1176110
Patent Number(s):
7,178,608
Application Number:
10/709,802
Assignee:
Schlumberger Technology Corporation OSTI
DOE Contract Number:
FC26-O3NT41835
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Mayes, James C., Araya, Mario A., and Thorp, Richard Edward. While drilling system and method. United States: N. p., 2007. Web.
Mayes, James C., Araya, Mario A., & Thorp, Richard Edward. While drilling system and method. United States.
Mayes, James C., Araya, Mario A., and Thorp, Richard Edward. Tue . "While drilling system and method". United States. doi:. https://www.osti.gov/servlets/purl/1176110.
@article{osti_1176110,
title = {While drilling system and method},
author = {Mayes, James C. and Araya, Mario A. and Thorp, Richard Edward},
abstractNote = {A while drilling system and method for determining downhole parameters is provided. The system includes a retrievable while drilling tool positionable in a downhole drilling tool, a sensor chassis and at least one sensor. The while drilling tool is positionable in the downhole drilling tool and has a first communication coupler at an end thereof. The sensor chassis is supported in the drilling tool. The sensor chassis has a second communication coupler at an end thereof for operative connection with the first communication coupler. The sensor is positioned in the chassis and is adapted to measure internal and/or external parameters of the drilling tool. The sensor is operatively connected to the while drilling tool via the communication coupler for communication therebetween. The sensor may be positioned in the while drilling tool and retrievable with the drilling tool. Preferably, the system is operable in high temperature and high pressure conditions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 20 00:00:00 EST 2007},
month = {Tue Feb 20 00:00:00 EST 2007}
}

Patent:

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  • A logging-while-drilling apparatus for obtaining subsurface measurements during drilling in a fluid-filled borehole and for communicating the measurements to the surface of the earth, comprising: a downwhole sensing and transmitting subsystem including means mountable on a drill string for obtaining measurement information; means for generating acoustic carrier waves at a nominal frequency in the borehole fluid; means for psk modulating the generated acoustic carrier waves in accordance with digital data representative of said measurements by momentarily unidirectionally either decreasing or increasing the frequency of said acoustic carrier waves; and an uphole receiving subsystem including transducer means for converting the modulatedmore » acoustic carrier waves to electronic signals; and filter means for selectively filtering said electronic signals, said filter means having a bandpass characteristic which is skewed in the direction of said unidirectional decrease or increase of frequency.« less
  • A logging-while-drilling apparatus for obtaining subsurface measurements during drilling in a fluid-filled borehole and for communicating the measurements to the surface of the earth comprises: a downhole sensing and transmitting subsystem including means mountable on a drill string for obtaining measurement information; means for generating acoustic carrier waves at a nominal frequency in the borehole fluid; means for psk modulating the generated acoustic carrier waves in accordance with digital data representative of said measurements by momentarily unidirectionally either decreasing or increasing the frequency of said acoustic carrier signal; and an uphole receiving subsystem including transducer means for converting the modulatedmore » acoustic carrier waves to an input electronic signal; and a carrier tracking loop circuit which includes a controlled oscillator having a control terminal, the frequency of said oscillator being determined by a signal applied to said control terminal; comparator means for generating a control signal by comparing the phase of a signal derived from said input signal to the phase of a signal derived from the output of said controlled oscillator; means for applying said control signal to the control terminal of said oscillator; and means responsive to transitions in said input signal for compensating the signal applied to said control terminal to account for the difference between the nominal frequency of said carrier and the average frequency of the input signal which results from the unidirectional nature of the carrier modulation; and means for recovering the digital data by demodulating said input signal with a signal derived from the output of said controlled oscillator.« less
  • This patent describes a method for monitoring the drilling process while drilling a borehole through subsurface formations with a drill bit. The method comprising the steps of: generating a signal indicative of the torque applied to the drill bit in the drilling process; and distinguishing between argillaceous, porous and tight formations and generating an indication thereof in response to the signal indicative of torque.
  • This patent describes a method for determining subsurface conditions encountered by a drill bit while drilling a borehole. It comprises: during the drilling process, determining rate of penetration and generation a signal indicative thereof; during the drilling process, determining downhole torque and generating a signal indicative thereof; in response to signals indicative of rate of penetration and downhole torque, generating an indication of the occurrence of a subsurface condition selected from the group comprising high formation porosity, a damaged bit bearing and the development of an undergauge bit.
  • The method of automatically determining the lag time for drilling fluid to move through a well annulus while drilling a well in which drilling fluid is pumped down a drill pipe, out of a drill bit and up the annulus is described comprising: measuring the lag time, by inserting a marker in the drill pipe, and deriving a relationship between measured pump strokes, pump pressure and fluid velocity in the annulus, determining a relationship between pump pressure and lag time over a range of pump pressures, thereafter continuously measuring pump pressure while drilling and calculating lag time from the relationshipmore » previously determined, measuring the depth of the drill bit using the change in the depth measurement for adjusting the calculated lag time, measuring at least one parameter of the drilling fluid flowing out of the annulus, and correlating the measured mud parameter with the calculated lag time and thus to depth.« less