Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Seal Element
Definition(s)
Seal element
Part of an I/J-tube seal that provides the seal. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsSeabed Connection
Definition(s)
Seabed connection
Connection between flexible riser end fitting and riser base. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsScouring
Definition(s)
Scouring
Removal or dissolution of parts of the seabed by bottom currents. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsScour
Removal of seabed material from the foundation due to current and waves. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global StandardsRepair Clamp
Definition(s)
Repair clamp
Clamp that is positioned over a damaged area of flexible pipe as a means to repair such an area. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsReaction Flange
Definition(s)
Reaction flange
Bend restrictor interface structure comprising a split flange arrangement that bolts directly to the support structure over which a bend restrictor element is assembled. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsReaction Collar
Definition(s)
Reaction collar
Bend restrictor interface structure comprising a split-shell configuration that clamps around the flexible pipe end fitting.
Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards
Raw Materials Supplier
Definition(s)
Raw Materials Supplier
The manufacturer of raw material used to produce qualified bolting defined as the steel mill or forging supplier.- NOTE: A distributor is not considered a raw material supplier.
Raw materials supplier
Supplier of raw materials for any of the components of an item of ancillary equipment. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPrototype Test
Definition(s)
Prototype Test
Test carried out in order to establish or verify a principal performance characteristic for a particular design, which may be a new or established design. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPrototype Test
Test to establish or verify a principal performance characteristic for a particular pipe design, which may be a new or established design. Source: API RP 17B, Recommended Practice for Flexible Pipe, Fourth Edition, July 2008. Global StandardsPiggy-back Guide
Definition(s)
Piggy-back guide
Spacer in a piggy-back system that is clamped to the supporting pipe and allows relative movement of the supported pipe. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPiggy-back clamps and guides
Piggy-back clamps or guides are used at regular intervals along a pipe length to “piggy back” other lines such as umbilicals or flexible pipes. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPiggy-back Clamp
Definition(s)
Piggy-back clamp
Spacer in a piggy-back system that is clamped to the supporting and supported pipe and does not allow relative movement of the supported pipe. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPiggy-back clamps and guides
Piggy-back clamps or guides are used at regular intervals along a pipe length to “piggy back” other lines such as umbilicals or flexible pipes. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPermanent Bend Stiffener
Definition(s)
Permanent bend stiffener
Bend stiffener that is to be used for the entire service life of the flexible pipe. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPermanent Ancillary Equipment
Definition(s)
Permanent ancillary equipment
Ancillary equipment that is to be used for the entire service life of the flexible pipe. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPassive Fire Protection
Definition(s)
Passive Fire Protection
Method of minimizing fire damage by use of sacrificial or non-combustible coatings. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global StandardsPassive Fire Protection (PFP)
Coating or cladding arrangement or free-standing system which, in the event of fire, will provide thermal protection to restrict the rate at which heat is transmitted to the object or area being protected Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global StandardsPassive Fire Protection
Coating, cladding, or free-standing system that provides thermal protection in the event of a fire and that requires no manual, mechanical or other means of initiation, replenishment or sustenance. NOTE Definition taken from DNV OS-D-301. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsOxidative Ageing
Definition(s)
Oxidative ageing
Degradation of a material over time, due to exposure to oxygen, caused by changes at the molecular level. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsOver-boarding Chute
Definition(s)
Over-boarding chute
Arch-shaped structure positioned at the edge of a vessel that is used as an installation aid for flexible pipe. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsMoonpool
Definition(s)
Moonpool
Opening in a platform/vessel that allows access to the water. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsNet Buoyancy
Definition(s)
Net buoyancy
Resulting buoyancy after considering all buoyant and nonbuoyant components in a subsea buoy or buoyancy module. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsModule Element
Definition(s)
Module element
Part of a buoyancy or ballast module that gives uplift or added weight to the module. Does not include buoyancy tanks. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsMix
Definition(s)
Mix
Unique mix of polymer material constituent components. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsMicrosphere
Definition(s)
Microsphere
Ceramic, polymer or composite sphere between 1 μm and 1000 μm in diameter that forms a structural part of syntactic and composite syntactic foams. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsMembrane Stress
Definition(s)
Membrane stress or σp
Average stress value across the thickness of a solid section, excluding the effects of discontinuities and stress concentrations. EXAMPLE The general primary membrane stress in a pipe loaded in pure tension is the tension divided by the cross-sectional area. σp may include global bending as in the case of a simple pipe loaded by a bending moment. NOTE Definition taken from API 2RD. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsMembrane stress
Membrane stress in a section is the average stress induced by a force normal to the section. It is calculated using the classical equation for normal stress (S = F/A). Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global StandardsMechanical Protection
Definition(s)
Mechanical protection
Layer of material that encloses a prescribed length of flexible pipe in order to protect it against abrasion and impact loads or to provide clearance between the flexible pipe and other subsea lines. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsManufacturer
Definition(s)
Manufacturer
Party which manufactures or supplies composite plain pipe and piping components to perform the duties specified by the contractoractive fire protection. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global StandardsManufacturer
OEM or CEM of the product or part.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global StandardsManufacturer
Signifies the entity that manufactures the material or product, or carries out part production that determines the quality of the material or product, or does the final assembly of the product. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsManufacturer
Company responsible for the manufacture of the interface. Source: API Recommended Practice 17H, Remotely Operated Tools and Interfaces on Subsea Production Systems, Second Edition, June 2013 (Addendum 1, October 2014). Global Standards Source: API RP 17H, Remotely Operated Vehicle (ROV) Interfaces on Subsea Production Systems, First Edition, July 2004 (Reaffirmed January 2009). Global StandardsManufacturer
For the purposes of this recommended practice, the manufacturer of the ancillary equipment. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsManufacturer
Individual or company that makes or processes equipment or material covered by this International Standard. Source: API RP 8B, Recommended Practice for Procedures for Inspections, Maintenance, Repair and Remanufacture of Hoisting Equipment, Seventh Edition, March 2002 (Reaffirmed: August 2012). Global StandardsManufacturer
Principal agent in the design, fabrication and furnishing of equipment, who chooses to comply with this International Standard. Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global StandardsManufacturer
One or more of the following, depending on the context: pipe mill; processor; threader; coupling manufacturer, pup-joint manufacturer; accessory manufacturer.- NOTE See Clause 14.
Manufacturer
Individual or organization that takes the responsibility for the manufacture of a riser component. NOTE The manufacturer may subcontract one or more of the above mentioned tasks under its responsibility. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global StandardsManufacturer
Individual or organization that is normally responsible for the design and manufacture of the C/WO riser and its conformance with this part of ISO 13628.- NOTE: The manufacturer can subcontract one or more of the above-mentioned tasks under its responsibility.