[ RIG SELECTION & ACCEPTANCE ADVISORY ]
Selecting the right drilling rig is the single most critical commercial and operational decision in any well program. Wrong rig = NPT, budget overruns, and operational risk.
We bring 26+ years of offshore drilling operations and rig acceptance experience across every major MODU class. From initial rig inspection visits through full acceptance audits — we wrote the standards that major operators use.
Our rig acceptance process covers 15 major audit areas, 31+ pre-acceptance inspection points, and comprehensive non-conformance categorisation to ensure every rig meets operational and regulatory requirements before spud.
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[ MODU CLASSES ]
[JACK_UP]
< 400 FT WATER
Self-elevating platforms for shallow water continental shelf operations. Proven workhorse of the industry — cost-effective for development drilling and well intervention.
3-leg independent cantilever
Up to 30,000 ft drilling depth
Harsh environment capable
Self-propelled or towed
[SEMI_SUB]
400–10,000 FT
Column-stabilized floating units for deepwater and ultra-deepwater drilling. Superior motion characteristics in rough seas. The platform of choice for frontier exploration.
6th generation DP capability
Dual BOP systems
Moored or dynamic positioning
HP/HT rated to 20,000 psi
[DRILL_SHIP]
> 5,000 FT ULTRA-DEEP
Ship-shaped vessels with full drilling capability for ultra-deepwater frontier exploration. Maximum variable deck load and storage. Can transit between locations under own power.
DP-3 station keeping
Dual derrick / dual activity
Up to 40,000 ft total depth
Moonpool 80ft x 80ft
[LAND_RIG]
ONSHORE
Conventional and unconventional onshore drilling rigs. From small workover units to 3,000 HP AC-drive rigs for horizontal shale wells. Pad drilling efficiency.
AC/SCR/Mechanical drive
Walking / skidding systems
Automated pipe handling
Batch drilling capability
[ WELL DESIGN → RIG SELECTION ]
Every well program has unique requirements — water depth, casing design, pressure profile, temperature rating. The rig must match the well, not the other way around. A deepwater HP/HT exploration well demands a completely different rig than a shallow water development campaign.
[UDW]
DP3 DRILLSHIP
CASING PROGRAM
KEY REQUIREMENTS
Subsea BOP Stack
7,500m Drill Depth
SOBM Compliant
24MW DP-3 Thrusters
150HP ROV
WITS/WITSML + RTDMA
[MWD]
DP3 SEMI-SUBMERSIBLE
CASING PROGRAM
KEY REQUIREMENTS
Subsea BOP Stack
6,000m Drill Depth
DP-3 Station Keeping
Dual Activity Capable
ROV System
VSAT 10Mbps
[SHL]
ANCHOR MOORED FLOATER
CASING PROGRAM
KEY REQUIREMENTS
Surface/Subsea BOP
5,000m Drill Depth
8/12 Point Mooring
Pre-laid Anchors
AHT Support
Standard Mud System
WHY THIS MATTERS
Selecting a rig without fully understanding the well design is how campaigns go wrong. A 3,000m ultra-deepwater well requires 24MW DP-3 thrusters, a 150HP ROV, and subsea BOP rated for extreme pressures. A 600m shelf well can use a simpler moored floater at a fraction of the day rate.
We analyze every aspect of the well program — casing strings, mud weights, anticipated pressures and temperatures, completion design, data requirements — before recommending a single rig.
WHAT WE EVALUATE
Casing program vs rig hook load capacity
Water depth vs rig DP class / mooring capability
BHP/BHT vs BOP & mud system ratings
Completion type vs rig deck space & crane capacity
Data requirements vs rig instrumentation
Mud system (WBM/OBM/SOBM) vs rig configuration
Logistics footprint vs supply vessel capability
Regional regulatory & environmental compliance
[ NON-CONFORMANCE CATEGORISATION ]
Every finding during rig inspection is categorised by severity. The Drilling Manager is responsible for ensuring the rig audit, follow-up work inspection, and rig acceptance complies with these requirements.
Essential equipment, processes and systems that are being inappropriately used, exceed operational limits, are out of service or obsolete to a point that may lead to personnel injury, environmental damage, or extensive operational downtime.
ACCEPTANCE:
Corrective action required before rig acceptance.
Essential equipment, processes and systems that are being ineffectively used, approaching operational limits or experiences historic downtime that may lead to damage or have a significant detrimental effect to drilling efficiency and well delivery.
ACCEPTANCE:
Corrective action required prior to commencing drilling operations.
Equipment, processes and systems that may have minor deficiencies that may lead to a situation that contributes to an incident or to circumstances in which required operational standards may be compromised.
ACCEPTANCE:
Corrective action recommended.
[ RIG ACCEPTANCE AUDIT ]
A comprehensive rig acceptance audit covers 12 critical systems. Each area is inspected, assessed for non-conformance, and documented with corrective actions required for acceptance.
[HSE]
AUDIT AREAInterview OIM, Rig Manager, STP, Chief Engineer, TP, DSV. Review 9-month HSE record. Gap analysis against operator requirements. DAFWCF, recordable frequency, near misses, incidents, spills.
[CRT]
AUDIT AREAAs-built verification. Equipment standards compliance. Maintenance records. Certification status for all safety-critical rig equipment and well control systems.
[DRL]
AUDIT AREATop drive unit, pipe racking system, iron roughneck, drawworks, rotary table. Backup/contingency for all critical drilling floor systems.
[BOP]
AUDIT AREABOP stack configuration, overhaul status, test records. Choke & kill manifold layout. IBOP, gray valves, dart subs. MoC records. Mud gas separator capacity.
[MRN]
AUDIT AREADynamic positioning system audit. Thruster condition. Ballasting and marine systems. Station keeping performance. FMEA currency.
[RSR]
AUDIT AREALower marine riser package. Riser joint condition and certification. Subsea read-back gauges on BOP & kill/choke line. ROV system capability.
[MUD]
AUDIT AREALP and HP mud system verification. System separation capability. Double block and bleed at dumps and access points. Cement unit liquid additive system redundancy.
[BLK]
AUDIT AREABulk product transfer speed and quality. Barite, bentonite, cement storage and handling. Pneumatic transfer system condition.
[PWR]
AUDIT AREAMain and emergency generators. SCR/VFD systems. Power distribution. Potential exposures to loss of all rig floor systems. BOP backup power.
[LFT]
AUDIT AREACritical load path inspection programme. Derrick and craneage systems. Dropped objects (DROPS) monitoring and inspection system. Lifting gear certification.
[ACC]
AUDIT AREARegulatory compliance for operating region. Office management and communications. Satellite phone, wi-fi, workspace for operator and third-party personnel.
[CTL]
AUDIT AREASoftware Management of Change audit. Virus/malware protection. Remote connectivity analysis. System stability risk assessment. Software versions and backups.
[ PRE-ACCEPTANCE SCOPE OF WORK ]
Before committing to a rig contract, we conduct a structured pre-acceptance inspection to get an early base understanding of the rig's operating condition and key equipment. This ensures there are no disqualifying issues before proceeding to full acceptance audit.
Personnel competency and turnover assessment
QHSE performance — incidents, trends, closeouts
Planned Maintenance System (PMS) assessment
Operational downtime record (BOP, DP, TDU, PRS)
Equipment condition — safety and drilling equipment
Verification scheme quality and outstanding issues
Emergency backup systems — BOP, fire-fighting, lifesaving
All equipment safety devices fully operational
Certification complete for all safety-critical equipment
Regional Call Out Contracts (COCs) available
Well control system certification current
BOP major overhaul status confirmed
Management of Change (MoC) — 5-year review
Critical load path and lifting gear inspection
Drilling instrumentation fully calibrated
Software interlocks established and not bypassed
Zone management / anti-clash systems operational
OEM contracts for rapid mobilisation of critical spares
HP relief valve / hose management system in place
DROPS monitoring system active and regular
Permit to Work system audit (electrical, hot work)
Gas detection and HVAC fire dampers certified
Alarm system review — prioritisation, frequency, repairs
Control System Stability & Security risk assessment
[ OUR PROCESS ]
01
Analyze your well design, casing program, target depth, anticipated pressures and temperatures. Define rig requirements and operating envelope.
02
Evaluate available rigs matching your specs. Day rates, availability, contractor track record, equipment condition, and crew competency.
03
31-point pre-acceptance inspection to confirm rig condition, identify showstoppers, and assess NPT/WOW data before committing to contract.
04
Comprehensive 12-area rig acceptance audit with non-conformance tracking, corrective action close-out, and final acceptance documentation.
[ ADDITIONAL SERVICES ]
Inspection requirements post major work-scopes and shipyard visits. Project execution plan review, rebuild commissioning checks, punch list close-out.
FAT attendance for new or rebuilt equipment. Verification of OEM specifications, performance testing, and documentation before installation on the rig.
Complete verification of all rig certifications, class certificates, and regulatory compliance for the target operating region.
Digital Rig Preventative Maintenance System audit. QHSE compliance, DP system review, maintenance backlog analysis, and planned maintenance effectiveness.
Software Management of Change audit. Control system stability assessment, cybersecurity risk analysis, virus protection, and backup verification.
Rig contract review for hidden costs — standby rates, WOTPS clauses, force majeure, liability caps, mobilization/demobilization terms. Powered by S.K.Y.E. AI analysis.
[ DIGITAL RIG ACCEPTANCE SYSTEM ]
Purpose-built digital rig acceptance audit system. Every inspection item, non-conformance, load test, and operating standard tracked in real-time from rig floor to management dashboard.
[TOT]
3
TOTAL AUDITS
[ACT]
1
IN PROGRESS
[DON]
2
COMPLETED
[CRT]
4
CRITICAL NCS
Blind rams failed to fully close during function test. Requires overhaul before acceptance.
67%
COMPLETE
342/512
ITEMS CHECKED
318
PASSED
24
FAILED
4
CRITICAL
Must fix before acceptance
11
MAJOR
Must fix before drilling
9
MINOR
Recommended improvement
Rated capacity testing for all critical systems
Drawworks — hoist rated capacity
2 hrs
BOP — pressure test (low/high)
4 hrs
Crane #1 — rated capacity lift
2 hrs
DP — station keeping trial
4 hrs
Minimum performance benchmarks
BOP disconnect time — <45 seconds
Generator — N-1 redundancy maintained
Gas detection — response <30 seconds
ROV — deployment within 30 minutes
20
INSPECTION SECTIONS
512+
CHECKLIST ITEMS
15
FUNCTIONAL LOAD TESTS
24
MIN OPERATING STANDARDS
Covering: HSE Management · Competency · Certification · Derrick · Rig Floor Equipment · BOP Stack · Choke & Kill · Drilling Fluids · Marine Operations · DP System · Cranes & Lifting · Safety Systems · ROV · Cementing · Communications · Maintenance · Accommodation · Personnel · Dual Activity · Rig Software
[ EXPERIENCE ]
Combined 65+ years of offshore drilling operations. Deepwater HP/HT specialist across Africa, Mediterranean, Americas, and Middle East. We don't recommend rigs from a spreadsheet — we've worked the iron.
Our team has authored rig acceptance standards used by major operators for floating MODU selection across global deepwater campaigns. From initial rig inspection visits through full acceptance audit and close-out.
Rig Inspector (Abel Engineering) credentials. Roustabout to Senior Drilling Supervisor career progression. P&A and platform abandonment experience.
SELECTION CRITERIA WE EVALUATE
Water depth & well design compatibility
BOP class & well control equipment
Hook load & top drive capacity
Variable deck load requirements
DP class & station keeping capability
Mud system capacity & HP rating
Third-party equipment integration
Regional regulatory compliance
Contractor HSE track record
Maintenance backlog & PMS status
Mobilisation logistics & timeline
Day rate benchmarking & contract terms
Tell S.K.Y.E. about your well program — water depth, target depth, expected pressures — and we'll recommend the right rig class, conduct pre-acceptance inspections, and manage the full acceptance audit through to close-out.