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SC8-Subcommittee on Drilling Structures & Equipment

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Jacqueline Roueche
p: 202.682.8286


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 Committee Scope

API SC8 develops and maintains approximately 11 standards on:

  • drilling structures - Spec 4F and RP 4G;
  • drilling equipment - Spec 7K and RP 7L;
  • hoisting equipment - RP 8B and Spec 8C;
  • wire rope and roller chain - Spec 9A, RP 9B, and Spec 7F;
  • hammer unions - RP 7HU1 and Spec 7HU2.

You can get further details and scopes of these standards in the Exploration and Production section of the API Publications catalog at


 Committee Documents


  Reference Documents
  CSOEM Links

 Open Ballots

 Ballot IDStatusResultsOpensClosesDescription
Committee ID : 532SC08/TG01: Drilling Structures
4284ClosedPass10/04/201711/15/2017API 4F - Item 5102 (Definition of Crown Block Assembly)
4285ClosedPass10/04/201711/15/2017API 4F - Item 5104 (Definition of Design Validation)
4286ClosedPass10/04/201711/15/2017API 4F - Item 6106 (Tubular Steel)
4287ClosedPass10/04/201711/15/2017API 4F - Item 6107 (Removal of Commercial Requirements)
4503ClosedPass06/25/201808/06/2018API Spec 4F, Item6106 (Use of Tubular Steel Members) - Reballot
4508ClosedPass06/28/201808/16/2018API 4F, Clarification of Wording - Sec.
4505ClosedPass06/28/201808/16/2018API 4G, 5th edition
4564ClosedPass08/27/201810/05/2018API 4F, 4th edition, Item 6102 - Implementation of AISC-360-16
4784ClosedPass03/25/201905/06/20194F, e4 WI-6102, Upgrade to AISC e15
4814ClosedPass05/02/201906/13/2019API 4F, 4th Edition, WI 6102-Part 2, Design for Stability
4848ClosedPass07/08/201908/05/2019API 4F, 5th Edition, WI-8102_Sec. 8.1.5 Hydraulic Cylinders
4850ClosedResolution Required07/08/201908/19/2019API RP 4G, 5th Edition, WI 8104, Name Plating
5112OpenIn Progress03/30/202004/27/2020API RP 4G, 5th Edition, Addendum 1, Operating Day
Committee ID : 1111SC08/TG02: Drilling Equipment
4542ClosedPass07/20/201808/31/2018API 7K - Item 7201 (Design Verification and Validation)
4543ClosedPass07/20/201808/31/2018API 7K- Item-2202and3201-Hoses-20180720
4546ClosedResolution Required07/25/201808/31/2018API 7K, e6, Ammendment Item 7202; Alignment of 8C(3301)into 7K
4545ClosedPass07/23/201808/31/2018API 7L, 2e, Addendum hose related
4583ClosedPass08/29/201810/10/2018API 7K, 6th Edition, Item 5203 (Power Tongs)
4855ClosedPass07/10/201908/21/2019API 7K, 7th Edition, BOP Handling - Comments Only
4857ClosedPass07/19/201908/30/2019API RP 7L, 1st Edition - Reaffirmation
4876ClosedResolution Required08/01/201909/12/2019API Spec 7K, 6th Edition, WI-8202_Dropped Objects
4952ClosedPass10/09/201911/20/2019API Spec 7K, 6th Edition, WI 0202-Drawworks-Comment Only
Committee ID : 1112SC08/TG03: Hoisting Equipment
2701ClosedPass07/02/201208/03/2012Spec 8C, Item 1302 - Top Drive
3013ClosedPass07/29/201309/09/2013API 8B & 8C, Item 2302 - Wear Limits for Elevator Bores
3058ClosedPass08/27/201309/17/2013Third Reballot of API 8C, Item 0305 - Hydraulic Cylinders
3104ClosedPass10/01/201311/12/2013API 8C, Revisions to Section 9.9.3
3526ClosedPass03/11/201504/22/2015API 8C - Item 4303: Revisions to Section 8.6.1 (proof load testing)
3965ClosedPass09/15/201610/20/2016API 8C - Item 5306 (Impact Properties of Elevator Slips)
4070ClosedPass02/16/201703/30/2017API 8C - Item 3301 (Nominal Equivalent Stress)
4476ClosedPass05/09/201806/07/2018API 8B - 8th Edition, Addendum 1
4473ClosedPass05/08/201806/07/2018API 8C - Item 7302 (Sheave Marking Req)
4474ClosedPass05/08/201806/07/2018API 8C - Item 7303 (Rotary Swivel Pressure Test)
4551ClosedResolution Required08/13/201809/24/20188C_6e_Item5301_AcceptanceCriteriaforNon-FerromagneticMetals
4552ClosedPass08/13/201809/24/2018API 8C-6e, Item 3302 Marking Requirements
4856ClosedPass07/19/201908/30/2019API Spec 8C, 5th Edition - Reaffirmation
4877ClosedResolution Required08/01/201909/12/2019API 8C, 5th Edition, WI 5304
Committee ID : 1113SC08/TG04: Wire Rope & Roller Chain
4468ClosedPass05/07/201806/07/2018API 9B - Item 1402 (Wire Rope Design Factors)
4472ClosedPass05/08/201806/07/2018API 9B - Item 5401 (Improve Clarity)
4706ClosedPass01/15/201902/19/2019API 9B_Item5401-part2_Clarify Sec. 2.7
4826ClosedPass05/28/201907/02/2019API Spec 9A, 27th edition, document review
Committee ID : 1331SC08/TG05: Hammer Unions
4846ClosedResolution Required07/03/201908/14/2019API 7HU2, 1st Edition
5020ClosedPass01/31/202002/28/2020API RP 7HU1, 1st Edition - Reaffirmation
5115OpenIn Progress04/02/202005/14/2020API Spec 7HU2, 1st Edition, Limited Reballot
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