Sentence examples for pipe rotation from inspiring English sources

For the eccentric case, the pipe rotation generates rotational flow near the bottom of the wellbore.

The flow domain near drillpipe is rotating with a certain speed to simulate the pipe rotation effect, and the outer flow domain is static.

A reduction of the pressure gradient (Fig. 7) is caused by an increased shear rate and a decreased cuttings concentration, both due to the pipe rotation.

A literature review indicated that there are not many 3D CFD simulation studies of foam cutting transport, especially involving inclined wellbores with pipe rotation and eccentricity.

Also, CT rotation, similar to drill pipe rotation, is not economically practical with current CT technologies.

Prior to LDA measurements, burner stability characteristics were determined in terms of gas flow rate and pipe rotation speed.

At low fluid inlet velocities, increasing the drill pipe rotation from 0 to 80 rpm dose not significantly affect the cuttings concentration; although an increase in drill pipe rotation speed from 100 to 120 rpm provided a remarkable improvement.

Then the effects of velocity, fluid type, pipe rotation, drilling cuttings and eccentricity on pressure drop were investigated.

A numerical model is presented that accurately estimates the annular frictional pressure losses with and without the inner pipe rotation.

There is no additional contribution of drill pipe rotation to cuttings transport after reaching a critical rotation speed.

There is no additional contribution of drill pipe rotation after reaching a critical speed at high fluid inlet velocities.