API SPEC 16A
Specification for Drill Through Equipment
|Publication Date:||1 December 1997|
This specification is formulated to provide for the availability of safe and functionally interchangeable drill through equipment utilized for drilling for oil and gas.
Technical content provides requirements for performance, design, materials, tests and inspection, welding, marking, handling, storing, and shipping. This specification does not apply to field use or field testing of drill through equipment.
Critical components are those parts having requirements specified in this document.
Specific equipment covered by this specification is listed as follows:
a. Ram blowout preventers.
b. Ram blocks, packers and top seals.
c. Annular blowout preventers.
d. Annular packing units.
e. Hydraulic connectors.
f. Drilling spools.
h. Loose connections.
Dimensional interchangeability is limited to end and outlet connections.
1.2.3 Service Conditions
Service conditions refer to classifications for pressure, temperature and wellbore fluids listed in 4.2 for which the equipment will be designed.
1.3 PRODUCT SPECIFICATION
This specification establishes requirements for products listed in 1.2.1.
1.4 UNITS AND DIMENSIONING
For the purposes of this specification, the decimal/inch system is the standard for the dimensions shown in this specification. API Size Designation will continue to be shown as fractions. Appendix A gives fraction-to-decimal equivalence. For the purposes of this specification, the fractions and their decimal equivalents are equal and interchangeable.
1.5 METRIC CONVERSIONS
Metric conversions are described in Appendix A.
Appendices to this specification shall not be considered as requirements. They are included only as guidelines or information.