E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
354/7
E21B 49/00 (2006.01) E21B 47/00 (2006.01) G06F 15/46 (1980.01) E21B 47/04 (2006.01)
Patent
CA 1103802
ABSTRACT OF THE DISCLOSURE A apparatus for simulating the circulating of a fluid in a circulation system for an oil well extending from the surface of the earth to a point intersecting an underground formation comprising; manually adjustable means for indicating the pump rate of a pump in the circulation system; manually adjustable means for indicating the density of the fluid being pumped; manually adjustable means for indicating the relative opening of a choke in the circulation system; manually adjust- able means for indicating the opened and closed positions of a blowout preventer in the circulation system; manually adjust- able means for indicating the opened and closed positions of a valve controlling fluid communication between the choice and the oil well annulus in the circulation system, a programmable digital calculator means for receiving signals from said pump rate indicating means, said fluid density indicating means, said relative opening of choke indicating means, said blowout pre- venter position indicating means, said valve position indicating means, and for generating digital signals, responsive to said received signals, representative of the value of fluid pressure at a plurality of points in the circulation system; digital calculating means, in said programmable digital calculator for substracting a value of a fluid pressure for the bottom of the oil well, which is generated by said programmable digital cal- culator responsive to said received signals, from a value re- presenting the pressure of the formation, and for multiplying the resultant times the product of a value representing the rate of penetration of a bit in the oil well and the number 10 raised to the power of -4, thereby determining the value of fluid volume invading the well bore, and for providing a digital signal representing a value of pressure in a standpipe and a casing in the oil well responsive to said received signals and said determined value of invading fluid volume, and, display means, responsive to said digital signals for displaying said fluid pressure values, including at least the fluid pressure in said standpipe and the fluid pressure in said casing of the oil well circulation system.
354408
Gau Gerald S.
Zamora Mario
Company Halliburton
Swabey Ogilvy Renault
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