Prior to commencement of each well the Drilling Supervisor with the assistance of the Drilling Contractor Toolpusher shall perform a full rig inspection and record the results on the Company Drilling Rig Inspections Report.
The Drilling Supervisor shall ensure that downhole and surface equipment inspection requirements are met prior to and during drilling activities.
Downhole Equipment Requirements
It is a requirement for downhole equipment that:
- drilling tools and equipment for each hole section shall be on hand, inspected and in serviceable condition prior to spud in / casing drill out operations
- the drilling contractor verifies all drill string assembly items are dimensionally checked prior to RIH. Records of assembly sheets shall be maintained for the duration of the contract and a copy provided for the Drilling Supervisor and to Doha base.
- items used continuously in the hole shall be checked periodically on trips (i.e., DP and DC connections)
- only ‘fit for purpose’ drill pipe shall be used (ie., as defined in the latest edition of API RP7G and specified in the contract with the Drilling Contractor). Premium API Class is the minimum requirement
- drillpipe shall be inspected as specified in the Company’s contract with the Drilling Contractor
- drillpipe tool joints shall be inspected to ensure they have smooth hardfacing only
- ditch magnets shall be installed in the flowline to monitor casing wear,
- all lifting equipment shall have current lift certification
- all fishing tools appropriate to the tubular components required to be run in hole shall be available at the wellsite. Drilling Contractor’s fishing tools shall be available as per the contract. (for onshore operations, fishing tools are kept in Dukhan base camp). If contractual fishing tools are not available, the Drilling Contractor shall provide at their cost.
- the Drilling Supervisor shall ensure that the Drilling Contractor and service companies maintain records of equipment usage and inspections and that records are available on the rig (i.e., drilling line ton miles, DP, DC, jar rotating hours, and pump hours). All used equipment (Mud motors, MWD, LWD) sent to therig shall be accompanied by usage time sheets, ie., total hours are known prior to use.
- all downhole equipment shall be drifted (with plastic/metal rabbit and flushed).
- when utilising a dart sub, the dart shall be checked for passage through the kelly cock, the full opening valve and all subs used in the string.
- jars should be run as per the recommendations given in the Well Design Manual Chapter 5 depending on hole conditions and local experience.
- all string stabilisers shall be of integral blade type. No sleeve type string stabs shall be run, mud motor stabilisers are an exception.
- when roller reamers are used instead of stabilisers, the number run shall be limited to the maximum recommended by the manufacturer.
- float valves shall be used in drilling of top hole sections.
- consideration shall be given to running a junk sub assembly prior to diamond/PDC or corehead and in addition when bit wear or drilling condition indicate.
- a minimum of three rates shall be taken with each pump. Pressures shall be recorded and posted at the driller’s position utilising the same gauge as that used during well control operations.
Surface Equipment Requirements
It is a requirement for surface equipment that:
- all rig floor equipment, including Geolograph chart, Crown-O-Matic, gauges, recorders, and alarms shall be functioning properly
- solids control equipment shall be serviced and cleaned immediately upon shutdown /cleaning out cement.
- all mud pumps and mud circulation system shall be inspected daily
- prior to commencement of work, an acceptance test shall be conducted on all rig equipment to certify that it is in working condition
- rig maintenance personnel shall ensure that records of all scheduled maintenance are kept (daily inspections shall be made on all major equipment and the Drilling Supervisor shall be informed of all ongoing and planned work at the daily meeting).
- Trip tank must be used to monitor the well when not drilling/circulating e.g. POOH, RIH, running wireline surveys etc. Trip tank to be calibrated in ½ bbl scale.
- All casing handling and running equipment are rated for the required operation.
- All cranes shall be certified and be 100 % efficient.
- All lifting equipment (including slings) must have valid certificates.
Note: All rig surface equipment requirements shall be as per the Drilling Rig contract.