HT-350 High Temperature Operation Report
Construct borehole of Changshen-24 well is 152mm,design depth 4900m,vertical depth 3700m, KOP is 4250m ,horizontal
section 1100m. Changshen-24 well is the highest temperature horizontal well in Changshen block,drilling finish at 4681m,
static temperature 160 degrees at the bottom, increase the operation difficult , The stability of the tools face
1、Tools run in hole at 3:00 on 21th October 2012, run in hole depth is 4106m,static temperature 125 degrees at the
bottom,the tools pull out of the well at 05:30 on 18th February 2013 with the static temperature 130 degrees,MWD using
time 782 and LWD using time 980hours,total using time 1762 hours with trouble free.
2、After the down-hole tools pull out of the well, the pulser and probe with good condition and no erosion after test. The
spare parts don't need to replace, assembled again wait for the next well test.
3、Tools keep excellent performance with strong signal,fast transmission and low error rate at the depth of 4681m.
4、Tools run in hole with pumping pressure 11-21MPa,drilling finish with 25 trips from the depth 4106m to 4681m,the total
operation time are 1762 hours with trouble free.
5、The tools has high stability, high accuracy, low failure rate, obtain first party's consistent high praise.