|Brazoria County, Texas||TOP|
Operator drilled to 8980, set 7 5/8" casing at 8738, and left 242
of 9 7/8" rat hole. Well was drilled to 10,676, but could not circulate, after
a bit trip the operator was forced to pull back up into the casing to break circulation.
Attempted to run back to bottom, washed and reamed to 8984 where hole packed off.
Added 5# pbl of soltex and raised the funnel viscosity to 50 sec/qt.
|Newton County, Texas #1||TOP|
horizontal well was kicked off at 12,655 ft, and drilled to a depth of 17,670. The
well had two camel backs at about midway through the horizontal section. The operator was
having great difficulty in sliding and very high torque when trying to rotate at
|Newton County, Texas #2||TOP|
Operator was drilling a horizontal well, and experiencing very high rotary torque, and
having great difficulty sliding Thuslick was added to the water based mud
system, and rotary torque decreased to acceptable levels. Sliding rates continued
to be slow (about one foot per hour), so a 70 barrel pill was mixed using 11.7 pounds per
barrel of Thuslickand 3 barrel of diesel.
|Grady County, Oklahoma||TOP|
Operator was drilling a directional well below 16,000. The drilling rate was one
foot per hour and the operator found steel in the cuttings indicating severe casing wear. Thuslick
was added to the water based mud system with the following results; the casing wear
was eliminated, and the drilling rate increased to 3 to 4 ft. per hour.
Operator was drilling offshore Louisiana with shallow surface casing set. The well was
deviated to 30 degrees when serious problems were encountered with torque, drag and shale
sloughing. Penetration rates were 30 ft. per hour. The pipe was stuck, and a spotting
fluid was used to free the pipe.
|Marathon Oil Report||TOP|
|This well was
oil base mud to the top of the Anadarko,
a thick and very hard limestone formation.
| At this point 7"
casing was set and the oil base mud was changed for water base mud. The well was drilled
out with 5-7/8" bit. When the customer decided to use Thuslick they were
experiencing high torque, drag, low penetration and metal cutting in the mud. They also
were making coring runs and had gone to a diamond bid.