POWERED DRILL COLLAR SLIP LINERS

Brand	Owner	Address	Description
GREEN TRIANGLE	NATIONAL OILWELL VARCO, L.P.	7909 Parkwood Circle Drive Houston TX 77036	POWERED DRILL COLLAR SLIP LINERS, PUMP VALVES, AND PUMP VALVE SEATS IN THE OIL AND GAS INDUSTRY;[ METAL CLAMPS FOR USE IN REPAIRING PIPE IN THE OIL AND GAS INDUSTRY ];[ CENTRIFUGAL PUMP PACKING FOR USE IN THE OIL AND GAS INDUSTRY ];GREEN TRIANGLE;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A while drilling system and method for determining annular pressure while drilling is provided. The system is positioned in a drilling tool suspended from a drilling rig via a drill string. The system includes at least one drill collar, a while drilling tool and at least one external sensor. The drill collar has a tubular sidewall defining a passage therein for the flow of drilling mud therethrough. The while drilling tool is supported in the passage of the at least one drill collar and selectively retrievable therefrom. The external sensor is positioned in the sidewall of the drill collar and isolated from the passage. The sensor is exposed to the wellbore for measurement thereof and adapted to wirelessly communicate with the while drilling tool. The system is preferably adapted for use in high temperature and pressure environments.