Title:
METHOD OF CALCULATING DEPTH OF WELL BORE
Document Type and Number:
WIPO Patent Application WO/2015/024814
Kind Code:
A3
Abstract:
A method of calculating vertical depth in a well bore containing a drill pipe and well fluid, comprises the steps of: a) using a first pressure sensor to measure the pressure of said well fluid at a first location to produce a first pressure value; b) using a second pressure sensor fixed to said drill pipe to measure the pressure of said well fluid at a second location to produce a second pressure value; c) calculating a fluid density value for said well fluid using said first and second pressure values; d) using a third pressure sensor fixed to said drill pipe to measure the pressure of said well fluid at a third location to produce a third pressure value; e) determining a reference pressure, being the pressure of said well fluid at a reference location; and f) calculating the vertical depth of said third location using said fluid density value, said third pressure value and said reference pressure.
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Inventors:
MANUM HENRIK (NO)
Application Number:
PCT/EP2014/067221
Publication Date:
May 28, 2015
Filing Date:
August 12, 2014
Export Citation:
Assignee:
STATOIL PETROLEUM AS (NO)
International Classes:
E21B47/04
Foreign References:
| US6026914A | 2000-02-22 | |||
| US20130090855A1 | 2013-04-11 | |||
| US20070277975A1 | 2007-12-06 |
Attorney, Agent or Firm:
ASQUITH, Julian (Fletcher House Heatley Road,The Oxford Science Park, Oxford Oxfordshire OX4 4GE, GB)
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