Drilling orientation tool

Details Drilling orientation tool Drilling orientation tool

H - Electricity

04

B

349/5

H04B 11/00 (2006.01) E21B 47/022 (2006.01) E21B 47/18 (2006.01)

Patent

CA 1143823

IMPROVED DRILLING ORIENTATION TOOL Abstract of the Disclosure In the preferred and illustrated embodiment of the present apparatus, a drilling orientation tool is disclosed utilizing a mud pressure charging system where the pressure charge is converted into hydraulic oil pressure. The hydraulic oil flow is supplied to a four-way, three-position, solenoid operated valve having a closed center position, the valve forming a control signal delivered to an adjustable constriction in the mud flow path through the tool. Variables are encoded dependent on opening and closing of the constriction. Consecutive variables are transmitted in the form of fine and coarse measures. The electrically operated solenoid valve thus encodes two or more variables for transmission to the surface by detecting mud pressure variations in the mud flow line at the surface.

359232

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