Measurement-while-drilling assembly using real-time toolface oriented measurements
1 Assignment
0 Petitions
Accused Products
Abstract
This invention provides a measurement-while-drilling (MWD) downhole assembly for use in drilling boreholes which utilizes directional formation evaluation devices on a rotating assembly in conjunction with toolface orientation sensors. The data from the toolface orientation sensors are analyzed by a processor and toolface angle measurements are determined at defined intervals. Formation evaluation sensors operate substantially independently of the toolface orientation sensors and measurements of the formation evaluation sensors are analyzed in combination with the determined toolface angle to obtain formation parameters.
24 Citations
36 Claims
-
1-17. -17. (canceled)
-
18. A method of determining a parameter of interest of a medium proximate to a borehole using a rotating downhole assembly in said borehole, the method comprising:
-
(a) obtaining information about a tool-face angle of the assembly during rotation thereof;
(b) using a directionally sensitive evaluation device for obtaining measurements indicative of the parameter of interest, said measurements being obtained separately over a plurality of specified time intervals; and
(c) . representing the directionally sensitive measurements by a series expansion that includes a sinusoidal variation with the toolface angle. - View Dependent Claims (19, 20, 22, 23, 24, 25, 26, 27, 28)
-
- 21. (canceled)
-
30-32. -32. (canceled)
-
33. An apparatus for determining a parameter of interest of a medium proximate to a borehole;
- the apparatus comprising;
(a) a bottomhole assembly (BHA) conveyed in the borehole;
(b) an orientation sensor which obtains information about a tool-face angle of he BHA during rotation thereof;
(c) a directionally sensitive evaluation device which obtains measurements indicative of the parameter of interest; and
(d) a processor which represetnts the directionally sensitive measurements by a series expansion that includes a sinusoidal variation with the toolface angle. - View Dependent Claims (34, 35, 36)
- the apparatus comprising;
Specification