Means for passing fluids through well tubing walls

Means for recovering oil from tar sand deposits and the like

Means for reducing liquid level in well tubing

Means for sealing a gap around a conductor pipe

Means for tensioning tubing in a wellhead assembly

Means for the production of an effluent contained in a...

Means to prevent inward leakage across seals in a well tool

Measure while drilling systems

Measurement and intervention process and device in a well

Measurement device in a horizontal well

Measurement of borehole ellipticity with a dual spaced...

Measurement of curvature of a subsurface borehole, and use...

Measurement tool for obtaining tool face on a rotating drill...

Measurement while drilling apparatus and method of using the...

Measurement while drilling bi-directional pulser operating...

Measurement while drilling tool and method

Measurement while drilling tool with interconnect assembly

Measurement-while-drilling assembly using gyroscopic devices...

Measurement-while-drilling assembly using real-time toolface...

Measurement-while-drilling assembly using real-time toolface...