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Audit of the Rig 838 and Rig 282 of Caspian

September 25, 2016


Well Services, conducted from 08.08.2016 and 08.11.2016 both in the Kosomolskoye field, Tasbolat field and Caspian Well Services (CWS) office in Aktau, Kazakhstan.


Contractor and rig were found to be compliant with the requirements as laid down in the OMV E&P Well Engineering Management System. Both rigs have been used for OMV workover operations in Tasbolat field and Kosomolskoye field. 

Compared to the last audit performed in 2015, Caspian Well Services have progressed with improving their managements systems and rig condition. Since the end of the audit the contractor presented different documents in order to close the audit findings.

Section 6, paragraph 1 of the OMV Well Engineering Technical Policy stated that: “All drilling and workover rigs, well test spreads, snubbing and coiled tubing units shall be subject to a pre-hire audit to the standards laid down in the OMV EP Well Engineering Standard: Drilling, Workover and Well Service Unit Audit. Pre-hire and Acceptance (Doc No: E-C.2.3-HW-STD-008-01). All
rigs and well sites shall comply with the requirements of the OMV Environmental Policies. […] The unit shall be demonstrated to be capable of safe operation under the conditions prevailing at the location, including allowance for unforeseen schedule changes. All deviations from the approved standards shall be assessed into one of three categories: critical, major and minor. Corrective actions or mitigation measures shall be agreed prior to contract commitment. Operations shall not commence with the rig until all “critical” actions are closed out” “Critical”: systems that do not comply with OMV Policy and Standards or the condition of which presents a risk of Major Accident. The Subsidiary shall not accept the rig on contract neither commence operations until the critical non-conformances are rectified and risks reduced to ALART levels.

“Major” or “Minor”: observations concerning systems that generally comply with OMV Policy and Standards and present no risk of Major Accident. This category may contain items that require to be addressed at the discretion of the OMV Subsidiary in the interests of operational efficiency.


The objective of the rig audit procedure is to identify and reduce to ALARP levels any risk of the contracted unit precipitating a major accident through defective equipment, incompetent personnel or flawed management systems. The report lists only those items that were found to be noncompliant with the requirements as laid down in the Drilling, Workover and Well Service Unit Audit; Pre-hire and Acceptance (Doc. No: E-C.2.3-HQ-STD-007), all other audited items are therefore implicitly confirmed as fully compliant.

The audit was performed to identify those conditions associated with the rig equipment, personnel and management systems that may present a risk of major accident y reference to applicable provisions of:

  • OMV HSSE and Well Engineering Policies, Standards and Guidelines as laid out in sections 3, 4 and 5 in the Drilling, Workover and Well Service Unit Audit; Pre-hire and Acceptance (Doc. No: E-C.2.3-HQ-STD-007)

  • Rig Audit Contractor standards and procedures

  • API specifications and recommended practices

  • Local legislation

In the case of mobile offshore drilling units, the audit also referes to the following additional standards:

  • The IMO MODU Code


  • STCW95 and, for DP units, Statoil TR 1027

  • Classification Society Rules.

The following International standards were used by the OMV Petrom surveyor to identify and perform the rig audit:

  • American Petroleum Institute (API)

  • Spec 4F Drilling and Well Servicing Structures

  • Spec 6A Specification for Wellhead and Christmas tree equipment

  • Spec 6D Pipeline Valves

  • Spec 6H End Closures, Connectors and Swivels

  • Spec 7-1 Rotary Drill Stem Elements

  • Spec 7K Drilling and Well Servicing Equipment

  • Spec 8A Drilling and Production Hoisting Equipment

  • Spec 8C Drilling and Production Hoisting Equipment (PSL1 and PSL2)

  • Spec 9A Wire Rope

  • Spec 16A Drill Through Equipment

  • Spec 16C Choke and Kill Systems

  • EquipmentSpec 16D Control Systems for Drilling Well Control Equipment and Control Systems for Diverter 

  • Spec 16R Marine Drilling Riser Couplings

  • RP 2C Offshore Pedestal-mounted Cranes

  • RP 2D Operation and Maintenance of Offshore Cranes

  • StructuresRP 4G Operation, Inspection, Maintenance and Repair of Drilling and Well Servicing 

  • RP 7C-11F Installation, Maintenance, and Operation of Internal-Combustion Engines

  • RP 7G Drill Stem Design and Operating Limits

  • RP 8B Inspections, Maintenance, Repair and Remanufacture of Hoisting Equipment

  • RP 9B Application Care, and use of Wire Rope for Oil Field Service


Exploration & Production, EP-W, Vienna Page 9 of 17
Rig Audit Report
RP 14F Design, Installation and Maintenance of Electrical Systems for fixed and Floating Offshore Petroleum Facilities for Unclassified and Class 1, Division 1 and Division 2 Locations
RP 14J Design and Hazards Analysis
RP 16E Design of Control Systems for Drilling Well Control Equipment
RP 16Q Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems
RP 49 Drilling and Well Servicing Operations involving Hydrogen Sulfide
RP 52 Land Drilling Practices for Protection of the Environment
STD 53 Blowout Prevention Equipment Systems for Drilling Wells
RP 54 Occupational Safety for Oil and Gas Well Drilling and Servicing Operations
RP 64 Diverter Systems Equipment and Operations
RP 500 Classification of Locations for Electrical Installation at Petroleum Facilities Classified as Class 1, Division 1 and Division 2
RP 521 Guide for Pressure-relieving and Depressuring Systems: Petroleum petrochemical and natural gas industries – Pressure relieving and depressuring systems RP 572 Inspection of Pressure Vessels.

NACE MR 01-75: EN-Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment
NFPA 70 National Electric Code NEC
IMCA Common marine Inspection Document (CMID)
IMO Mobile Offshore Drilling Units (MODU Code)
STCW95 Standard of Training, Certification and Watchkeeping – 1995

TR1029 StatoilHydro Governing Document, “DP Requirements for Drilling and Intervention Units”, Technical Requirements, TR1029, Version 1, Valid from 01.09.2002. Presented at the September 2002 Dynamic Positioning Conference of the Marine Technology Society. (Internet link ) See also MTS website:

IADC Safety Case: HSE Case Guidelines for Mobile Offshore Drilling Units. International Association of Drilling Contractors (IADC), Issue 3.5, 1 January 2014 LOLER Lifting Operations and Lifting Equipment Regulations 1998 (UK). The audit verified that the contractor installs, operates, maintains and repairs equipment and systems in a way that ensures they remain in conformance with its original performance specification and in compliance with applicable certification requirements.

Personnel training and competence was assessed during the audit and it could be observed that the training matrix for rig personnel contained a few fields which were not up-to-date, even though the required training already took place. All rig personnel working for CWS undergo safety training for working in an industrial environment, as per Kazakh law. Additional to this, training for lifting operations, fire prevention and first aid is provided. Key personnel had valid IWCF certificates for well control.

As per last audit results CWS improves a lot in management system and preventive maintenance systems, though there is always room for improvement. CWS management makes every effort to improve the quality of providing WO services through its equipment, personnel and management systems. 

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