Why does differential sticking occur? What are the greatest ways to prevent it
from happening? The r ANSWER Differential sticking happens when a drill
pipe becomes lodged in the borehole walls.
Use drilling procedures that limit contact between the pipe and the borehole
wall, keep an eye out for pressure variations, maintain the right mud weight, and
make sure the hole is cleaned well to avoid cuttings buildup.
What are materials made of bentonite? The r ANSWER Known for their
swelling and absorbent qualities, bentonite materials are clay minerals rich in
montmorillonite that are frequently utilized in drilling fluids and other industrial
purposes.
What characteristic of drilling fluid is referred to as gel-strength? When drilling
fluid is at rest, it can form a gel-like consistency that helps keep particles from
settling and maintains the weight of the drill string when drilling pauses.
The penetration rates of two mud-rotary holes drilled in the same rock
formations varied. Describe the likely causes. ANSWER include differences
in bit type, bit weight, rotating speed, drilling fluid characteristics, hole cleaning
effectiveness, and the existence of fractures or other irregularities in the
geology.
How are high solids in drilling muds measured? What techniques are employed
to manage the accumulation of solids? Centrifuges are used to test ANSWER 's
density and cutting volume, while shale shakers and centrifuges are used for
removal, fluid loss additives are added, and appropriate circulation rates are
maintained.
How can a highly permeable rock formation be identified? The best way to find
out is to use well tests that monitor the rate of water flow and drawdown in
observation wells, like pumping tests or slug tests.
Which kinds of rocks belong to the sedimentary group? Limestone is the
ANSWER . Conglomerate, sandstone, and shale
What qualities should the mud have before drilling into a known rock formation
that produces water? ANSWER minimal fluid loss to reduce water invasion
from happening? The r ANSWER Differential sticking happens when a drill
pipe becomes lodged in the borehole walls.
Use drilling procedures that limit contact between the pipe and the borehole
wall, keep an eye out for pressure variations, maintain the right mud weight, and
make sure the hole is cleaned well to avoid cuttings buildup.
What are materials made of bentonite? The r ANSWER Known for their
swelling and absorbent qualities, bentonite materials are clay minerals rich in
montmorillonite that are frequently utilized in drilling fluids and other industrial
purposes.
What characteristic of drilling fluid is referred to as gel-strength? When drilling
fluid is at rest, it can form a gel-like consistency that helps keep particles from
settling and maintains the weight of the drill string when drilling pauses.
The penetration rates of two mud-rotary holes drilled in the same rock
formations varied. Describe the likely causes. ANSWER include differences
in bit type, bit weight, rotating speed, drilling fluid characteristics, hole cleaning
effectiveness, and the existence of fractures or other irregularities in the
geology.
How are high solids in drilling muds measured? What techniques are employed
to manage the accumulation of solids? Centrifuges are used to test ANSWER 's
density and cutting volume, while shale shakers and centrifuges are used for
removal, fluid loss additives are added, and appropriate circulation rates are
maintained.
How can a highly permeable rock formation be identified? The best way to find
out is to use well tests that monitor the rate of water flow and drawdown in
observation wells, like pumping tests or slug tests.
Which kinds of rocks belong to the sedimentary group? Limestone is the
ANSWER . Conglomerate, sandstone, and shale
What qualities should the mud have before drilling into a known rock formation
that produces water? ANSWER minimal fluid loss to reduce water invasion
