|North Mexico Mission Field||TOP|
Operator was drilling at 2963 meters. The drilling rate was approximately 3 Mts. an hour
with very high torque, causing the rotary to stall at times. The hole was also very tight
on connections. The well was on day 117 and they already had four sidetracks.
The angle of the sidetrack was 36.9 degrees. And the flowline temperature was 140 degrees
F. hole size was 6" with 1678.66 Mts. Of 7" casing set.
|North Mexico Argos Field||TOP|
| The operator drilled
6" hole to 4100 Mts. and began trying to log. Casing was set at 2670 Mts. and the
bottom hole temperature was 175 degrees C. Logs were run to bottom with no problem but
drag was so bad coming out of the hole that was impossible to log the well.
The Operator added 9 ppb of Thuslick to the open hole volume of the drilling mud, and spotted it in the open hole. The drag was eliminated and the well was logged successfully.
Drilling at a depth of 5751 Mts. with a polydrill mud system well began experiencing
torque running from 460 to 600 amps. This well was being drilled using 4.5" drill
pipe with 6" drill collars, and 8 3/8" hole size a decision was made to add
Thuslick in a concentration of 4.5 ppb. The torque dropped immediately
from 450 amps to 200 amps and remained there. The fluid loss dropped from
11ccs to 6.0 ccs, and the penetration rate increased 27%.