Means for milling peat

Means for mounting a roller cutter on a drill bit

Means for passing fluids through well tubing walls

Means for pneumatic gathering of milled peat

Means for recovering oil from tar sand deposits and the like

Means for reducing liquid level in well tubing

Means for removably affixing a cutter bit mounting lug to a...

Means for rolling sod and for positioning the rolls formed

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...