G-DRILL® (polyglycol shale inhibitor high cloud point)

G-DRILL® is a polyglycol shale inhibitor. Protects clay minerals from swelling. “Clouds out” within the shale matrix and causes pore plugging and preventing pore pressure transmission. Promotes cuttings integrity, helps their disposal at the shale shakers. Improves mud lubricity and anti-balling properties.

Description

G-DRILL® is a polyglycol shale inhibitor. Protects clay minerals from swelling. “Clouds out”

within the shale matrix and causes pore plugging and preventing pore pressure transmission. Promotes cuttings integrity, helps their disposal at the shale shakers. Improves mud lubricity and anti-balling properties.

When heated at the bottom by the bit rotating polyglycols form separate phases at higher temperatures and coat the wellbore and the cuttings with the protective film. When the mud is cooled at the surface the two phases again recombine to form a clear, single phase solution. The same mechanism takes place when the mud filtrate with G-DRILL® particles enters the formation with higher temperature.

Due to the slightly anionic nature of G-DRILL® the attraction between the polyglycol particles and positively charged clay edges gets easier.

Applications/Functions

improves shale stability
prevents fluids invasion into the shale matrix
coats cuttings with the protective film, helps removal on the shakers
improves lubricity
prevents colloidal solids build-up, decreases dilution volumes

Advantages

is compatible with the most used mud chemicals, it is recommended to combine G-DRILL® with STABILITE® II, POLYCAP®, aluminum complex)
is compatible with the most brines – bromides, acetates, formates

Recommended treatment

7-11 ppb (20-30 kg/m3). It is recommended to add G-DRILL®to the active mud before penetrating troublesome shales. It can be added directly into the suction pit or through the mud hopper. It is recommended to add the product slowly for proper mixing. Please refer to the product brochure for additional information.