Asia Drilling Pte Ltd.

AD-1,Drill Depth Capacity Estimation
Maximum Allowable pull, lbs	300,000	300,000	300,000	300,000	300,000
Maximum set back,lbs	225,000	225,000	225,000	225,000	225,000
Drill pipe Size	4-1/2''	3-1/2''	5''	4''HT	3-1/2''
Weight	16.6	15.5	19.5	14.0	13.3
Grade	S135	S135	S135	S135	S135
Tensile (new)	595,000	581,000	712,070	513,650	488,800
Torsion (new)	55,350	37,890	73,970	41,840	33,300
Connection	4-1/2'' XH(NC46)	3-1/2''IF(NC38)	4-1/2''IF	XTM39	XT38
Make up Torque (premium)	16,500	5,300	24,700	18,900	15,200
Tensile	TBA	TBA	TBA	667,800	TBA
Maximum safe pull (50 Tensile)	297,500	290,500	356,035	156,825	244,400
Maximum safe torque (80% make up torque)	13,200	4,240	19,760	15,120	12,160
Block Weight, lbs	25,000	25,000	25,000	25,000	25,000
Max alloweable pull less block, lbs	275,000	275,000	275,000	275,000	275,000
Pick up weight off bottom (80% max pull),lbs	220,000	220,000	220,000	220,000	220,000
String weight off bottom (80% of pick up weight),lbs	176,000	176,000	176,000	176,000	176,000
Buoyancies weight (9.0ppg, MW,BF=0.86)	204,651	204,651	204,651	204,651	204,651
Max well depth,ft	12,328	13,203	10,495	14,618	15,387
Max well depth,m	3,758	4,024	3,199	4,455	4,690
Maximum length for set backk,ft	13,554	14,516	11,538	16,071	16,917
Max Derrick Tacking Board,ft	8,900	12,000	<8900	<12,000	12,000

Maximum Drilling Depth Estimation