Clutch

Clutch

Definition(s)

Clutch

A means for engagement or disengagement of power. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Cab

Cab

Definition(s)

Cab

An enclosure for the operator and the machine operation controls. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards  

CAB

Body that performs conformity assessment services and that can be the object of accreditation. NOTE Whenever the word “CAB” is used in the text, it applies to both the “applicant and accredited CABs” unless otherwise specified. Source: ISO/IEC 17011:2004, Conformity assessment – General requirements for accreditation bodies accrediting conformity assessment bodies. Global Standards    
Bridle Sling

Bridle Sling

Definition(s)

Bridle Sling

A multi-leg wire or synthetic rope sling attached to a single point ring. The legs of the sling are spread to divide and equalize the load. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards  

Bridle Sling

A multi-leg sling attached to a single point ring. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Brake

Brake

Definition(s)

Brake

A device used for retarding or stopping motion or holding. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards  

Brake

A device used for holding, retarding, or stopping motion. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Boom Stop

Boom Stop

Definition(s)

Boom Stop

A device used to limit the angle of the boom at the highest recommended position. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards  

Boom Stop

A device used to prevent the boom from falling backwards in the case of high winds or a sudden release of load. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Boom Length

Boom Length

Definition(s)

Boom Length

The straight-line distance from the centerline of boom foot-pin to the centerline of the boom-point load hoist sheave pin, measured along the longitudinal axis of the boom. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Boom Hoist

Boom Hoist

Definition(s)

Boom Hoist

The hoist mechanism responsible for raising and lowering the boom. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Boom Angle Indicator

Boom Angle Indicator

Definition(s)

Boom Angle Indicator

An accessory which measures the angle of the boom above horizontal. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Boom

Boom

Definition(s)

Boom

A member hinged to the revolving upper-structure and used for supporting the hoist tackle. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Bearing Raceway

Bearing Raceway

Definition(s)

Bearing Raceway

The surface of the bearing rings which contact the rolling element (balls or rollers) of the swing-bearing assembly. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards  
Authorized Surveyor

Authorized Surveyor

Definition(s)

Authorized Surveyor

See the definition for Qualified Inspector. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards  

Authorized Surveyor

A person who works for a third-party certifying authority who is hired to inspect the crane. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Work String

Work String

Definition(s)

Work String

Tubular conduit used to convey well test tools downhole and provide a flow path for reservoir fluids to surface.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards

Work String

The drill pipe or tubing used in well workover operations or abandonment operations to perform specific downhole tasks such as running squeeze cementing tools and stimulation packers, as well as performing stimulation, testing, cementing, wellbore cleanout, etc. operations. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Work String

Collective term for jointed pipe, coiled tubing and wireline, BHA excluded. Source: NORSOK D-002, Well intervention equipment, Rev. 2, June 2013. Global Standards
Wireline Operations

Wireline Operations

Definition(s)

Wireline Operations

Operations performed in a wellbore using tools which are run and pulled on small diameter slick, braided, or electric wirelines. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Wellbore

Wellbore

Definition(s)

Wellbore

The interior surface of the cased or openhole through which drilling, production, or injection operations are conducted. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Underground Source of Drinking Water

Underground Source of Drinking Water

Definition(s)

Underground Source of Drinking Water (USDW)

An aquifer or its portion which supplies any public water supply system or currently supplies drinking water for human consumption or which contains sufficient water to supply a public water system or has a total dissolved solids (TDS) concentration of less than 10,000 mg/l. The EPA may exempt an aquifer if it will not serve as a source of drinking water in the future because it is economically or technically impractical to recover the water or to render it fit for human consumption or because the aquifer produces or is expected to commercially produce minerals, hydrocarbons, or geothermal energy. While the EPA defines a USDW as containing less than 10,000 mg/l TDS, certain states, such as California and Texas, have adopted a producing and injection well surface pipe protection standard for fresh water aquifers that contain less than 3,000 mg/l TDS. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Underground Source of Drinking Water (USDW)

"Underground Source of Drinking Water (USDW)" means an aquifer or its portion which: (A) Supplies any public water system; or (B) Contains a sufficient quantity of ground water to supply a public water system; and (i) Currently supplies drinking water for human consumption; or (ii) Contains fewer than 10,000 mg/l total dissolved solids; and (C) Is not an exempted aquifer. Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations  

Underground Source of Drinking Water (USDW)

“Underground source of drinking water” and “USDW” mean an aquifer or portion of an aquifer that supplies any public water system or that contains a sufficient quantity of groundwater to supply a public water system, and currently supplies drinking water for human consumption, or that contains fewer than ten thousand milligrams per liter total dissolved solids and is not an exempted aquifer. Source: Division of Mineral Resources Management - Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations  

Underground Source of Drinking Water (USDW)

“Underground source of drinking water” means an aquifer or its portion which: (1) Supplies any public water system, or (2) Contains a sufficient quantity of ground water to supply a public water system, and (a) Currently supplies drinking water for human consumption, or (b) Contains fewer than ten thousand mg/L total dissolved solids, and (3) Is not an exempted aquifer. Source: Division of Mineral Resources Management - Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations  

Underground Source of Drinking Water (USDW)

“Underground source of drinking water” means an aquifer that supplies water for human consumption or that contains ground water having a TDS concentration of 10,000 mg/l or less and that is not an exempted aquifer. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations  

Underground Source of Drinking Water (USDW)

An aquifer or its portion which is not an exempt aquifer as defined in 40 Code of Federal Regulations §146.4 and which: (A) supplies any public water system; or (B) contains a sufficient quantity of ground water to supply a public water system; and (i) currently supplies drinking water for human consumption; or (ii) contains fewer than 10,000 milligrams per liter (mg/l) total dissolved solids. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. Regulations
Stage Cementing Tool

Stage Cementing Tool

Definition(s)

Stage Cementing Tool

A tool installed in the casing string through which the stage cementing operations are conducted. The tool is placed in the casing string as the casing is being installed into the borehole. After the primary cement job has been completed, and the slurry has hardened, ports in the tool are opened so stage-cementing operations can proceed. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Stage Cementing

Stage Cementing

Definition(s)

Stage Cementing

A procedure that permits using a cement column height in the borehole that normally would cause fracture of a subsurface formation. Stage-cementing operations are conducted after the primary cement job has been completed in a normal manner. When the primary cement hardens, ports are opened in a stage-cementing tool which was placed in the casing string as casing was being installed into the borehole. The second-stage cement is pumped through the ports into the borehole above the top of the primary cement. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Squeeze Pressure

Squeeze Pressure

Definition(s)

Squeeze Pressure

That surface pressure required to force a cement slurry into the location desired and result in a differential pressure across the cement slurry that causes cement particles to separate from water (i.e. dehydration) and form a filter cake. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Squeeze Cementing

Squeeze Cementing

Definition(s)

Squeeze Cementing

Pumping a cement slurry to a specific point in the wellbore with sufficient pressure to force the cement into the location desired. This pressure will also tend to dehydrate the cement and form a high strength filter cake in perforations, in formation voids or fractures, or against the formation face. The filter cake becomes a barrier which will prevent fluid movement. Squeeze cementing is used to seal completion intervals, to repair casing leaks, to seal formation intervals behind pipe, and to protect fresh water aquifers. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Squeeze-Cementing

Remedial process in which cementing material is forced under pressure into a specific portion of the well such as a fracture or opening. Source: API RP 10B-2, Recommended Practice for Testing Well Cements, First Edition, July 2005 (Reaffirmed: July 2010). Global Standards
Slim Hole Completion

Slim Hole Completion

Definition(s)

Slim Hole Completion

A well that is completed without tubing. Usually, only small diameter casing is set and cemented. After perforating, formation fluids are produced out of the casing. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Retrievable Packer

Retrievable Packer

Definition(s)

Retrievable Packer

A tool consisting of slips, an open mandrel, and rubber sealing elements run on workstring or tubing to isolate the wellbore h m pressures encountered during squeeze cementing operations. The tool is intended to be set and released several times by methods specific to the tool design (i.e., tension or compression set). Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  
Productive Horizon

Productive Horizon

Definition(s)

Productive Horizon

Any stratum known to contain oil, gas, or geothermal resources in commercial quantities. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Productive Horizon

Any stratum known to contain oil, gas, or geothermal resources in commercial quantities in the area. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. Regulations  
Plug Back Total Depth

Plug Back Total Depth

Definition(s)

Plug Back Total Depth (PBTD)

The new bottom of a well that is established when a well is plugged back. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  
Plug Back

Plug Back

Definition(s)

Plug Back

To place cement or other material in the well to seal off a completion interval, to exclude bottom water, or to perform another operation such as side-tracking or producing from another depth. The term also refers to the setting of a mechanical plug in the casing. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  
Plug and Abandon

Plug and Abandon

Definition(s)

Plug and Abandon

Placement of a cement plug or plugs in a well, in which no future utility has been identified, to seal the entire wellbore against fluid migration, and protect fresh water aquifers from contamination. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  
Plug

Plug

Definition(s)

Plug

A device or material which may be temporarily or permanently placed in the wellbore to block off or isolate lower zones so that upper zones may be completed, stimulated, tested, cemented, produced, or injected into. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Plug

"Plug" means the closing off, in a manner prescribed by the Commission, of all oil, gas, and waterbearing formations in any producing or nonproducing wellbore before such well is abandoned. Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations  
Permeability

Permeability

Definition(s)

Permeability

The property of a porous medium which is a measure of the capacity of the medium to transmit fluids within its interconnected pore network. The usual unit of measurement is the millidarcy, or 0.001 darcy. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Permeability

Measure of the ease with which material can become magnetized. NOTE Permeability is the ratio of flux density and magnetizing force, i.e. B/H. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Permeability

Measure of the capacity of a porous medium to allow flow of fluids or gases. NOTE Permeability is usually expressed in millidarcy, mD. Source: API RP 10B-2, Recommended Practice for Testing Well Cements, First Edition, July 2005 (Reaffirmed: July 2010). Global Standards  

Permeability

Permeability of a space means the ratio of the volume within that space which is assumed to be occupied by water to the total volume of that space. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004, International Maritime Organization. Regulatory Guidance  

Permeability (μ)

Permeability ( of a space is the proportion of the immersed volume of that space which can be occupied by water. <Chapter II-1, regulation 2>. Source: IMO Resolution MSC.216(82), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 8 December 2006, International Maritime Organization. Legislation  

Permeability

“Permeability” in relation to a space is the ratio of the volume within that space which is assumed to be occupied by water to the total volume of that space. Source: IMO Resolution MSC.266(84), Code of Safety for Special Purpose Ships, 2008 (2008 SPS Code), 13 May 2008, International Maritime Organization. Regulatory Guidance
pH

pH

Definition(s)

pH

A unit to measure the degree of acidity or alkalinity of a liquid. A neutral solution, such as pure water, has a pH of 7. Acidic solutions have a pH less than 7. Alkaline solutions have a pH greater than 7. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

pH

The term “pH” denotes the negative logarithm of the hydrogen ion, H+, activity in aqueous solutions (activity and concentration are equal only in dilute solutions): pH =  log [H+]. For pure water at 24 °C (75 °F) the hydrogen ion activity [H+] is 10-7 mol/l and pH 7. This system is termed “neutral” because the hydroxyl ion activity [OH ] is also 10-7 mol/l. In aqueous systems at 24 °C (75 °F) the ion product, [H+] [OH-], is 10-14 (a constant). Consequently, an increase in H+denotes a like decrease in [OH-]. A change in pH of one unit indicates a ten-fold change in both [H+] and [OH-]. Solutions with pH less than 7 are termed “acidic” and those with pH greater than 7 are termed “basic” or “alkaline”.  Source: API RP 13B-1, Recommended Practice for Field Testing Water-based Drilling Fluids, Fourth Edition, March 2009. Global Standards  

PH

Piloted hydraulic. Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global Standards    
Mud

Mud

Definition(s)

Mud

The weighted liquid circulated through the wellbore during rotary drilling and workover operations. In addition to its function of bringing cuttings to the surface, drilling mud cools and lubricates the bit and drill stem, protects against blowouts by holding back subsurface pressures, and deposits a mud cake on the wall of the borehole to prevent loss of fluids into the formation. Originally a suspension of clays in water, the mud used in modem drilling is often a more complex mixture of liquids, reactive solids, or oil, often containing one or more conditioners. Water base mud made from oil field brine may also be used as a well control fluid in plugging operations. Also known as drilling fluid or drilling mud. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Mud

Fluid that is circulated through the wellbore during drilling or workover operations. Source: API RP 10B-2, Recommended Practice for Testing Well Cements, First Edition, July 2005 (Reaffirmed: July 2010). Global Standards  

Mud

Slurry of insoluble and soluble solids in either a water, synthetic or oil continuous-phase fluid. cf. drilling fluid (3.1.34). Source: API RP 13C, Recommended Practice on Drilling Fluids Processing Systems Evaluation, Upstream Segment, Fourth Edition, December 2010. Global Standards  

Mud

See Drilling Fluid. Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001). Global Standards  

Mud

"Mud" means any mixture of water and clay or other material as the term is commonly used in the industry. Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations  

Mud

Water- or oil-based fluid circulated down the drillpipe into the well and back up to the rig for purposes including containment of formation pressure, the removal of cuttings, bit lubrication and cooling, treating the wall of the well and providing a source for well data. Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global Standards  
Mechanical Integrity

Mechanical Integrity

Definition(s)

Mechanical Integrity

Defined by EPA as "no significant leak in the casing, tubing, and packer and no significant fluid movement into a USDW through vertical channels adjacent to the injection wellbore." Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards