Home>API standards>API SPEC 7-1-2006 pdf free download

API SPEC 7-1-2006 pdf free download

API SPEC 7-1-2006 pdf free download.Specification for Rotary Drill Stem Elements.
5.7.5 Supplemental marking Supplemental performance verification testing information shall be applied in a separate milled recess. Designations shall be used to indicate verified performance as follows: a) successful gas-tight sealing supplemental testing: “Gas-tight”; b) H 2 S trim supplemental requirement: “H 2 S trim”. 6 Square and hexagonal kellys 6.1 Size, type and dimensions Kellys shall be either square or hexagonal, and conform to the sizes and dimensions in Tables 4 and 5 and Figure 2 for square kellys, or Tables 6 and 7 and Figure 3 for hexagonal kellys. 6.2 Dimensional gauging 6.2.1 Drive section The drive section of all kellys shall be gauged for dimensional accuracy, using a sleeve gauge conforming to Table 8 and Figure 4. 6.2.2 Bore All kelly bores shall be gauged with a drift mandrel 3,05 m (10 ft) long minimum. The drift mandrel shall have a minimum diameter equal to the specified bore of the kelly (standard or optional) minus 3,2 mm (1/8 in). For 133,4 mm (5 1/4 in) hexagonal kellys, a standard or optional inside diameter (bore) may be specified (see Table 7). 6.3 Connections Kellys shall be furnished with box and pin connections in the sizes and styles stipulated in Table 5 or Table 7, and shall conform with the requirements of API Spec 7. For the lower end of 108 mm (4 1/4 in) and 133,4 mm (5 1/4 in) square kellys and for the lower end of 133,4 mm (5 1/4 in) and 152,4 mm (6 in) hexagonal kellys, two sizes and styles of connections are standard. A gall-resistant treatment of zinc or manganese phosphate shall be applied to the threads and sealing shoulders of both the upper and lower connections. Application of the treatment shall be after completion of all gauging. The type of treatment shall be the option of the manufacturer.
6.4 Square forged kellys Square forged kellys shall be manufactured such that the decarburized surface layer is removed in the zones defined by the radiuses joining the drive section to the upper and lower upsets and extending a minimum of 3,2 mm (1/8 in) beyond the tangency points of the radiuses. 6.5 Mechanical properties 6.5.1 General The mechanical properties of kellys, as manufactured, shall comply with the requirements of Table 9. 6.5.2 Tensile requirements Tensile properties shall be verified by performing a tensile test on one specimen per heat per heat treatment lot. Tensile properties shall be determined by tests on cylindrical specimens conforming to the requirements of ISO 6892, 0,2 % offset method. Specimens of diameter 12,7 mm (0.500 in) are preferred; specimens of diameter 8,9 mm (0.350 in) and 6,4 mm (0.250 in) are acceptable alternatives for thin sections. NOTE For the purposes of this provision, ASTM A 370 is equivalent to ISO 6892. Tensile specimens shall be taken from the lower upset of the kelly in a longitudinal direction, having the centreline of the tensile specimen 25,4 mm (1 in) from the outside surface or mid-wall, whichever is less. Tensile testing is not necessary or practical on the upper upset. A minimum Brinell Hardness number of 285 shall be prima facie evidence of satisfactory mechanical properties in the upper upset. The hardness test shall be made on the OD of the upper upset (Brinell Hardness in accordance with ISO 6506-1 is preferred although Rockwell C Hardness is an acceptable alternative). NOTE For the purposes of this provision, ASTM A 370 is equivalent to ISO 6506-1.
6.5.3 Impact strength requirements General Charpy V-notch impact tests shall be conducted on specimens conforming to the requirements of ISO 148 and shall be conducted at a temperature of 21 °C ± 3°C (70 °F ± 5 °F). Tests conducted at lower temperatures that meet the requirements stated in are acceptable. NOTE For the purposes of this provision, ASTM A 370 and ASTM E 23 are equivalent to ISO 148. Specimens One set of 3 specimens per heat per heat-treatment lot shall be tested. Specimens shall be taken from the lower upset at 25,4 mm (1 in) below the surface or at mid-wall, whichever is closer to the outer surface. The specimens shall be longitudinally oriented and radially notched.

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