We were present yesterday at a series of experiments with the newly invented annular drill, for blasting and mining purposes. To say that the tests applied were successful, is to say all that is ...

Tests on drilling mud recovered from the damaged well ... Instead, cement alone will be pumped into the annulus — the narrow channel between pipe-like casing in the center of the well and ...

HOUSTON -- BP said Saturday that it has begun an attempt to remove the drilling pipe from the ruptured well that unleashed the Deepwater Horizon spill. The attempt, which began Saturday morning ...

The Development Driller 3 drillbit was expected to hit the ­annulus sometime within 24 hours of the drilling restart, he added. The process could be slowed down if crews on the rig have to remove ...

produces a well that is not smeared with the annulus of the borehole or drilling fluid, with suspended solids that could “cake” or produce lower yielding water wells. This makes the bucket ...

Formation of freezing “water belts.” Formation of defective structure of the cement sheath in casing string-borehole annulus and in the drill string-casing annulus. Failure of contact between ...

The cement passes through a one-way valve, then rises back up into the annulus, the narrow gap between the steel casing and the rock walls of the drill hole. The cement used in such an operation ...

The Type A configuration is intended to prevent dangerous pressure spikes from the annulus and the Type I configuration protects drill pipes, casings and downhole tools from over-pressure within the ...