Equipment for supersonic drilling of rocky strata below the...

Equipment for use in drilling offshore wells

Equipment to reduce torque on a drill string

Erecting rig for a well pump

Erosion mitigating apparatus and method

Erosion resistant aperture for a downhole valve or ported...

Erosion resistant cutting bit with hardfacing

Erosion resistant downhole mud diverter tool

Erosion resistant drilling head assembly

Erosion resistant fluid passageways and flow tubes for...

Erosion resistant frac head

Erosion resistant rock drill bit

Erosion-indicating safety fitting

Error reduction in compensation of drill string interference...

Esp for perforated sumps in horizontal well applications

Esp pump for gassy wells

Estimating formation stresses using radial profiles of three...

Estimation of borehole geometry parameters and lateral tool...

Ether-amine oxides, a process for their preparation, and...

Eutectic material-based seal element for packers