Drill Collars: Connections and Recommended Make-up Torque

Drill Collars

 

SIZE (in.)CONNECTION TYPEO.D. (in.)MINIMUM MAKE-UP TORQUE IN FOOT-POUNDS
11-1/41-1/21-3/422-1/42-1/22-13/16
APINC 233
3-1/8
3-1/4
2,500
3,300
4,000
2,500
3,300
3,400
2,500
2,600
2,600
     
2-3/8Regular3
3-1/8
3-1/4
 2,200
3,000
3,900
2,200
3,000
3,300
2,200
2,600
2,600
    
2-7/8PAC3
3-1/8
3-1/4
 3,800
4,900
5,200
3,800
4,200
4,200
2,900
2,900
2,900
    
2-3/8

API

2-7/8
API IF


NC 26


Regular
3-1/2
3-3/4
3-1/2
3-3/4
3-7/8
 4,600
5,500
3,800
6,000
6,500
4,600
4,700
3,800
5,800
5,800
3,700
3,700
3,800
5,000
5,000
    
2-7/8SLIM HOLE         
2-7/8

3-1/2

2-7/8

EXTRA HOLE


DBL STREAMLINE


MOD. OPEN

3-3/4
3-7/8
4-1/8
 4,100
5,300
8,000
4,100
5,300
8,000
4,100
5,300
7,400
    
2-7/8

API

3-1/2

3-1/2

API IF


NC 31


Regular


SLIM HOLE

3-7/8
4-1/8
4-1/8
4-1/4
4-1/2
4-1/4
4-1/2
 4,600
7,300
6,500
7,900
10,900
8,800
10,000
4,600
7,300
6,500
7,900
10,500
8,800
9,300
4,600
7,300
6,500
7,900
9,600
8,100
8,100
4,600
6,800
6,500
7,900
8,500
6,800
6,800
6,500
7,200
7,300
  
APINC 354-1/2
4-3/4
5
   8,900
12,100
12,100
8,900
10,800
10,800
8,900
9,200
9,200
7,400
7,400
7,400 
 
3-1/2

4

3-1/2
EXTRA HOLE


SLIM HOLE


MOD. OPEN
4-1/4
4-1/2
4-3/4
5
5-1/4
   5,100
8,400
11,900
13,200
13,200
5,100
8,400
11,700
11,700
11,700
5,100
8,400
10,000
10,000
10,000
5,100
8,200
8,200
8,200
8,200 
 
3-1/2

API

4-1/2
API I.F.


NC 38


SLIM HOLE
4-3/4
5
5-1/4
5-1/2
   9,900
13,800
16,00
16,00
9,900
13,800
14,600
14,600
9,900
12,800
12,800
12,800
9,900
10,900
10,900
10,900 
8,300
8,300
8,300
8,300
3-1/2H-904-3/4
5
5-1/4
5-1/2
   8,700
12,700
16,900
18,500
8,700
12,700
16,700
16,700
8,700
12,700
15,000
15,000
8,700
12,700
13,100
13,100 
8,700
10,400
10,400
10,400 
4

API

4

4-1/2
FULL HOLE

NC 40

MOD. OPEN

DBL STREAMLINE
5
5-1/4
5-1/2
5-3/4
6
   10,800
15,100
19,700
20,400
20,400
10,800
15,100
18,600
18,600
18,600
10,800
15,100
16,900
16,900
16,900
10,800
14,800
14,800
14,800
14,800 
10,800
12,100
12,100
12,100
12,100
Drill Collars

 

SIZE (in.)CONNECTION TYPEO.D. (in.)MINIMUM MAKE-UP TORQUE IN FOOT-POUNDS
22-1/42-1/22-13/1633-1/4
4    H-90 *    5-1/4*12,50012,50012,50012,500  
5-1/2*17,30017,30017,30016,500  
5-3/4*22,30021,50019,40016,500  
623,50021,50019,40016,500  
6-1/423,50021,50019,40016,500  
4-1/2   API REGULAR   5-1/2*15,40015,40015,40015,400  
5-3/4*20,30020,30019,40016,200  
623,40021,60019,40016,200  
6-1/423,40021,60019,40016,200  
API   NC 44   5-3/4*20,60020,60020,60018,000  
625,00023,30021,20018,000  
6-1/425,00023,30021,20018,000  
6-1/225,00023,30021,20018,000  
4-1/2    API FULL HOLE    5-1/2*12,90012,90012,90012,90012,900  
5-3/4*17,90017,90017,90017,90017,700 
6*23,30023,30022,80019,80017,700  
6-1/427,00025,00022,80019,80017,700
6-1/227,00025,00022,80019,80017,700
4-1/2EXTRA HOLE5-3/4 17,60017,60017,60017,600  
APINC 466 23,20023,20022,20020,200  
 4API I.F.4-1/2 28,00025,50022,20020,200  
 4-1/2SEMI I.F.6-1/2 28,00025,50022,20020,200  
 5DBL STREAMLINE6-3/4 28,00025,50022,20020,200  
 4-1/2MOD. OPEN4-1/2      
4-1/2    H-90 *    5-3/4 17,60017,60017,60017,600  
6 23,40023,00023,00021,000  
6-1/4 28,50026,00023,00021,000  
6-1/2 28,50026,00023,00021,000  
6-3/4 28,50026,00023,00021,000  
5   H-90 *   6-1/4 25,00025,00025,00025,000  
6-1/2 31,50031,50029,50027,000  
6-3/4 35,00033,00029,50027,000  
7 35,00033,00029,50027,000  
4-1/2API I.F.6-1/4 22,80022,80022,80022,80022,800 
APINC 506-1/2 29,50029,50029,50029,50026,500 
EXTRA HOLE6-3/4 36,00035,50032,00030,000 26,500
MOD. OPEN7 36,00035,50032,00030,00026,500 
 5-1/2 DBL STREAMLINE7-1/4 38,00035,50032,00030,00026,500 
 5SEMI I.F.5-1/2 38,00035,50032,00030,00026,500 
5-1/2   H-90 *   6-3/4 34,00034,00034,000 34,000 
7 41,50040,00036,500 34,000 
7-1/4 42,50040,00036,500 34,000 
7-1/2 42,50040,00036,50034,000  
Drill Collars

 

SIZE (in.)CONNECTION TYPEO.D. (in.)MINIMUM MAKE-UP TORQUE IN FOOT-POUNDS
2-1/42-1/22-13/1633-1/43-1/23-3/4
5-1/2API REGULAR6-3/431,50031,50031,50031,500   
API REGULAR739,00039,00036,00033,500   
API REGULAR7-1/442,00039,50036,00033,500   
API REGULAR7-1/242,00039,50036,00033,500   
5-1/2API FULL HOLE7 32,50032,50032,50032,500  
API FULL HOLE7-1/4 40,50040,50040,50040,500  
API FULL HOLE7-1/2 49,00047,00045,000

 41,500

  
API FULL HOLE7-3/4 51,00047,00045,00041,500   
APINC 557-1/4 40,00040,000 40,000 40,000  
NC 557-1/2 48,50048,00045,000 42,000  
NC 557-3/4 51,00048,00045,000 42,000  
NC 558  51,000 48,000 45,000 42,000  
6-5/8API REGULAR7-1/2 46,00046,00046,000 46,000  
API REGULAR7-3/4 55,00053,00050,000 47,000  
API REGULAR8 57,00053,00050,000 47,000  
API REGULAR8-1/4 57,00053,00050,000 47,000  
6-5/8H-907-1/2 46,00046,00046,000 46,000  
H-907-3/4 55,00055,00053,000 49,000  
H-908 59,50056,00053,000 49,000  
H-908-1/4 59,50056,00053,000 49,000  
APINC 618  54,000 54,000 54,000 54,000  
NC 618-1/4 64,00064,00064,000 61,000  
NC 618-1/2 72,00068,00065,000 61,000  
NC 618-3/4 72,00068,00065,000 61,000  
NC 619 72,00068,00065,000 61,000  
5-1/2API I.F.8 56,00056,00056,00056,00056,000 
API I.F.8-1/4 66,00066,00066,00063,00059,000 
API I.F.8-1/2 74,00070,00067,00063,00059,000 
API I.F.8-3/4 74,00070,00067,00063,00059,000 
API I.F.9  74,000 70,000 67,000 63,00059,000 
API I.F.9-1/4 74,00070,00067,00063,00059,000 
6-5/8API FULL HOLE8-1/2  67,00067,00067,00057,00066,500
API FULL HOLE8-3/4  78,00078,00076,00072,00066,500
API FULL HOLE9  83,00080,00076,00072,00066,500
API FULL HOLE9-1/4  83,00080,00076,00072,00066,500
API FULL HOLE9-1/2   83,000 80,000 76,00072,00066,500
APINC 709  75,00075,000 75,00075,00075,000
NC 709-1/4  88,00088,000 88,00088,00088,000
NC 709-1/2  101,000101,000 100,00095,00090,000
NC 709-3/4   107,000 105,000 100,00095,00090,000
NC 7010  107,000105,000 100,00095,00090,000
NC 7010-1/4   107,000 105,000 100,00095,00090,000
APINC 7710    107,000 107,000107,000107,000
NC 7710-1/4   122,000 122,000122,000122,000
NC 7710-1/2   138,000 138,000133,000128,000
NC 7710-3/4   143,000 138,000133,000128,000
NC 7711   143,000 138,000133,000128,000
Drill Collars

 

 

SIZE (in.)CONNECTION TYPEO.D. (in.)MINIMUM MAKE-UP TORQUE IN FOOT-POUNDS
2-13/1633-1/43-1/23-3/4
7H-90853,00053,00053,00053,000 
8-1/463,00063,00063,00060,500 
8-1/271,50068,50065,00060,500 
7-5/8API REGULAR8-1/2 60,00060,00060,00060,000
8-3/4 71,00071,00071,00071,000
9 83,00083,00079,00074,000
9-1/4 88,00083,00079,00074,000
9-1/2 88,00083,00079,00074,000
7-5/8H-909 72,00072,00072,00072,000
9-1/4 85,50085,50085,50085,500
9-1/2 98,00098,00098,00095,500
8-5/8API REGULAR10 108,000108,000108,000108,000
10-1/4 123,000123,000123,000123,000
10-1/2 139,000134,000129,000123,000
8-5/8H-9010-1/4 112,500112,500112,500112,500
10-1/2 128,500128,500128,500128,500
7H-90 (with low torque face)8-3/467,50067,50066,50062,000 
974,00071,00066,50062,000 
7-5/8API REGULAR (with low torque face)9-1/4 72,00072,00072,00072,000
9-1/2 85,00085,00082,00077,000
9-3/4 91,00087,00082,00077,000
10 91,00087,00082,00077,000
7-5/8H-90 (with low torque face)9-3/4 91.00091.00091.00091.000
10 105.000105.000103.00096.000
10-1/4 112.500108.000103.50098.000
10-1/2 112.500108.000103.50098.000
8-5/8API REGULAR (with low torque face)10-3/4 112,000112,000112,000112,000
11 129,000129,000129,000129,000
8-5/8H-90 (with low torque face)10-3/4 92,50092.50092,50092,500
11 110,000110,000110,000110,000
11-1/4 128,000128,000128,000128,000

NOTE: IN EACH CONNECTION SIZE AND TYPE GROUP, TORQUE VALUES APPLY TO ALL CONNECTION TYPES IN THE GROUP. WHEN USED WITH THE SAME DRILL COLLAR OUTSIDE COLLAR DIAMETER AND BORE; I.E., 2-3/8″ API I.F., API NC 26 AND 2-7/8″ SLIM HOLE CONNECTIONS USED WITH 3-1/2″ X 1-1/4″ DRILL COLLARS ALL HAVE THE SAME MINIMUM MAKE-UP TORQUE OF 4600 FT.LBS. AND THE BOX IS THE WEAKER MEMBER.

  • TORQUE FIGURES PRECEDED BY AN ASTERISK INDICATE THE BOX AS THE WEAKER MEMBER FOR THE CORRESPONDING OUTSIDE DIAMETER (O.D.) AND BORE. THE PIN IS THE WEAKER MEMBER FOR ALL OTHER TORQUE VALUES.
  • RECOMMENDED MAKE-UP TORQUE CALCULATIONS ASSUME THE THOROUGH APPLICATION TO ALL THREADS AND SHOULDERS OF A THREAD COMPOUND WHICH CONTAINS EITHER 40 – 60% BY WEIGHT FINELY POWDERED METALIC ZINC OR 60% BY WEIGHT FINELY POWDERED METALIC LEAD AND NEVER MORE THAN 0.3% SULFUR. CALCULATIONS ALSO ASSUME USE OF THE MODIFIED JACK SCREW FORMULA CONTAINED IN API RP7G, APPENDIX A, PARAGRAPH A.8, AND A UNIT STRESS OF 62,500 PSI IN THE BOX OR PIN, WHICHEVER IS WEAKER.
  • NORMAL TORQUE RANGE IS TABULATED VALUE PLUS 10%. HIGHER VALUES MAY BE USED UNDER EXTREME CONDITIONS.
  • MAKE-UP TORQUE FOR 2-7/8″ PAC BASED ON 87,500 PSI STRESS AND OTHER FACTORS IN 1, ABOVE.
  • MAKE-UP TORQUE FOR H-90 BASED ON 56,200 PSI STRESS AND OTHER FACTORS IN 1, ABOVE.

DATA REPRINTED FROM TABLE 3.2, PP 34-36, 14 ED., API RP7G, AUGUST 1, 1990.