1. Basis of calculations for recommended makeup torque assumes the use of a thread compound containing 40 to 60% by weight of finely powered metallic zinc with not more than 0.3% total active sulfur, applied thoroughly to all threads and shoulders. Also using the modified screw jack formula as shown in the IADC Drilling manual and the API Recommended Practice RP 7G. For API connections and their interchangeable connections, makeup torque is based on 62,500 psi stress in the pin or box, whichever is weaker.
2. Normal torque range – tabulated minimum value to 10% greater. Largest diameter shown for each connection is the maximum recommended for that connection. If the connections are used on drill collars larger than the maximum shown, increase the torque values shown by 10% for a minimum value. In addition to the increased minimum torque value, it is also recommended that a fishing neck be machined to the maximum diameter shown.
3. H-90 connections makeup torque is based on 56,200 psi stress and other factors as stated in Note 1.
4. The 2 7/8 in. PAC makeup torque is based on 87,500 psi stress and other factors as stated in Note 1.
5. Largest diameter shown is the maximum recommended for these full-faced connections. If larger diameters are used, machine connections with low torque faces and use the torque values shown under low torque face tables. If low torque faces are not used, see Note 2 for increased torque values.
† Torque figures succeeded by a cross (†) indicate that the weaker member for the corresponding OD and bore is the BOX. For all other torque values the weaker member is the PIN.
Section 2 – Drill Collars
2002 Smith International, Inc. All rights reserved. 2-10
Recommended Minimum Makeup Torque (ft-lb) (continued) (see note #2 below)
1. Basis of calculations for recommended makeup torque assumes the use of a thread compound containing 40 to 60% by weight of finely powered metallic zinc with not more than 0.3% total active sulfur, applied thoroughly to all threads and shoulders. Also using the modified screw jack formula as shown in the IADC Drilling manual and the API Recommended Practice RP 7G. For API connections and their interchangeable connections, makeup torque is based on 62,500 psi stress in the pin or box, whichever is weaker.
2. Normal torque range – tabulated minimum value to 10% greater. Largest diameter shown for each connection is the maximum recommended for that connection. If the connections are used on drill collars larger than the maximum shown, increase the torque values shown by 10% for a minimum value. In addition to the increased minimum torque value, it is also recommended that a fishing neck be machined to the maximum diameter shown.
3. H-90 connections makeup torque is based on 56,200 psi stress and other factors as stated in Note 1.
4. The 2 7/8 in. PAC makeup torque is based on 87,500 psi stress and other factors as stated in Note 1.
5. Largest diameter shown is the maximum recommended for these full-faced connections. If larger diameters are used, machine connections with low torque faces and use the torque values shown under low torque face tables. If low torque faces are not used, see Note 2 for increased torque values.
† Torque figures succeeded by a cross (†) indicate that the weaker member for the corresponding OD and bore is the BOX. For all other torque values the weaker member is the PIN.
Section 2 – Drill Collars
2002 Smith International, Inc. All rights reserved. 2-11
Recommended Minimum Makeup Torque (ft-lb) (continued) (see note #2 below)
10-1/2* 141,134 136,146 130,177 125,034
10-1/4* 113,482† 113,482† 113,482† 113,482†
10-1/4 113,845 109,183 104,166 98,799
7-5/8 H-90
10-1/2 113,845 109,183 104,166 98,799
10-3/4 112,887† 112,887† 112,887† 112,887†
1. Basis of calculations for recommended makeup torque assumes the use of a thread compound containing 40 to 60% by weight of finely powered metallic zinc with not more than 0.3% total active sulfur, applied thoroughly to all threads and shoulders. Also using the modified screw jack formula as shown in the IADC Drilling manual and the API Recommended Practice RP 7G. For API connections and their interchangeable connections, makeup torque is based on 62,500 psi stress in the pin or box, whichever is weaker.
2. Normal torque range – tabulated minimum value to 10% greater. Largest diameter shown for each connection is the maximum recommended for that connection. If the connections are used on drill collars larger than the maximum shown, increase the torque values shown by 10% for a minimum value. In addition to the increased minimum torque value, it is also recommended that a fishing neck be machined to the maximum diameter shown.
3. H-90 connections makeup torque is based on 56,200 psi stress and other factors as stated in Note 1.
4. The 2 7/8 in. PAC makeup torque is based on 87,500 psi stress and other factors as stated in Note 1.
5. Largest diameter shown is the maximum recommended for these full-faced connections. If larger diameters are used, machine connections with low torque faces and use the torque values shown under low torque face tables. If low torque faces are not used, see Note 2 for increased torque values.
† Torque figures succeeded by a cross (†) indicate that the weaker member for the corresponding OD and bore is the BOX. For all other torque values the weaker member is the PIN.
Section 2 – Drill Collars
2002 Smith International, Inc. All rights reserved. 2-12
Recommended Minimum Makeup Torque (kg-m)
1. Basis of calculations for recommended makeup torque assumes the use of a thread compound containing 40 to 60% by weight of finely powered metallic zinc with not more than 0.3% total active sulfur, applied thoroughly to all threads and shoulders. Also using the modified screw jack formula as shown in the IADC Drilling manual and the API Recommended Practice RP 7G.
For API connections and their interchangeable connections, makeup torque is based on 62,500 psi stress in the pin or box, whichever is weaker.
2. Normal torque range – tabulated minimum value to 10% greater. Largest diameter shown for each connection is the maximum recommended for that connection. If the connections are used on drill collars larger than the maximum shown, increase the torque values shown by 10% for a minimum value. In addition to the increased minimum torque value, it is also recommended that a fishing neck be machined to the maximum diameter shown.
3. H-90 connections makeup torque is based on 56,200 psi stress and other factors as stated in Note 1.
4. The 2 7/8 in. PAC makeup torque is based on 87,500 psi stress and other factors as stated in Note 1.
5. Largest diameter shown is the maximum recommended for these full-faced connections. If larger diameters are used, machine connections with low torque faces and use the torque values shown under low torque face tables. If low torque faces are not used, see Note 2 for increased torque values.
† Torque figures succeeded by a cross (†) indicate that the weaker member for the corresponding OD and bore is the BOX. For all other torque values the weaker member is the PIN.