Drilling

Drilling

Of or relating to the penetration of the Earth's surface in order to extract petroleum oil.

Contributors in Drilling

Drilling

A hinged mechanism that may be closed around drillpipe or other drillstring components to facilitate lowering them into the wellbore or lifting them out of the wellbore. In the closed position, the ...

weighting material

Oil & gas; Drilling

A high-specific gravity and finely divided solid material used to increase density of a drilling fluid. (Dissolved salts that increase fluid density, such as calcium bromide in brines, are not called ...

kill line

Oil & gas; Drilling

A high-pressure pipe leading from an outlet on the BOP stack to the high-pressure rig pumps. During normal well control operations, kill fluid is pumped through the drillstring and annular fluid is ...

choke line

Oil & gas; Drilling

A high-pressure pipe leading from an outlet on the BOP stack to the backpressure choke and associated manifold. During well-control operations, the fluid under pressure in the wellbore flows out of ...

calcium chloride

Oil & gas; Drilling

A highly soluble calcium salt of formula CaCl 2 used to make drilling and workover fluids or brines with a density range from 8. 33 to 11. 6 lbm/gal (1. 39 g/cm 3 ) at saturation. CaCl 2 can be ...

lignosulfonate

Oil & gas; Drilling

A highly anionic polymer used to deflocculate clay-based muds. Lignosulfonate is a byproduct of the sulfite method for manufacturing paper from wood pulp. Sometimes it is called sulfonated lignin. ...

silicic acid

Oil & gas; Drilling

A group of seven hydrated forms of SiO 2 , including the following silicic acids: tetra, H 2 Si 4 O 9 , meta-di, H 2 Si 2 O 5 , meta-tri, H 4 Si 3 O 8 , meta, H 2 SiO 3 , ortho-tri, H 8 Si 3 O 10 , ...