drilling break

drilling break

[′dril·iŋ ‚brāk]
(petroleum engineering)
An abrupt increase in the rate of penetration of the drill bit during a well-drilling operation.
References in periodicals archive ?
The highly over-pressured kick zone is associated with a strong drilling break indicating formation porosity and permeability.
At 19:20hrson the 23rd of July 2019 at 4,111m, a drilling break saw the rate of penetration (ROP) increase to 35m/hr, coinciding with clean porous sandstone which was recovered over the shakers.
From a subsequent drilling break at 1,794.5 metres to the current depth a number of individual sand bodies have exhibited hydrocarbon shows described as fair to poor in cuttings samples.
This is not only a good result in isolation but is particularly encouraging when considered in context of the drilling break experienced when intersecting the Wagina, and the clean porous sands observed from 4111m to 4117m.
This upper section coincides with the significant drilling break, clean porous sands and gas flows observed over the 6m section (4,111-4,117m), as reported on the 24th of July.
The target objective in the Wilcox has been encountered over significantly larger intervals than originally anticipated and has given multiple extensive hydrocarbon shows which occurred during fast drilling breaks, and resulted in gas-cut mud weights, gas to the surface, condensate in the mud, and included pressures higher than anticipated.