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Questionnaire
Question : Bit bottom hole cleaning is an important part of the drilling optimisaiton process.
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Engineering the right nozzles can make a big difference
Flow rate is all that matters
Its all to do with the mud properties
Pump to the max.
Question : Best connection practices?
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Stop rotation, pick up, observe normal drag and make the connection
Backream as a matter of course, because we can.
Slow down pumps, backream, ream and then backream again.
Do what the company mans says, its his well.,
Question : Stringer drilling best practices?
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Pile the weight and lets get through it rapido!
Use parameters needed to assure wellbore quality is not compromised
Crank up the RPM, pump and WOB.
Company man stated 15K, if it takes three hrs to drill then so be it.
Question : Offshore 8,000ft water depth, 18.3/4" riser. 9.5/8" set at 16,000ft 10,000ft TVD 8.1/2" section TD's at 22,000ft 10,500ft TVD. Best TD circulating practise?
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Circulate 200% horizontal vol & POH to shoe, then circ clean
Circulate 2-3 bottoms ups rotating continuously working stand
Pump out of hole to shoe and then circulate clean
Circulate until shakers clean often requiring several circulations
Question : Where are your most common drilling problems occuring today?
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Downhole wellbore / formation related
Downhole tools and equipment failure
Rig equipment (mechanisation) failure
A combination of all three of the above
Question : After tripping at 16,000FT for bit change, using a 16ppg water based mud. At bottoms aup. A rapid 200bbl pit gain result as riser get evacuated due to a gas expansion. After the event well is however static and not flowing.
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Circulate riser to mud, another bttms up & if all Ok, drill ahead.
Increase mud weight then get back drilling.
Wiper trip to shoe, run back to bottom and circulate bottoms up.
Change out the driller and mud engineer, it was their fault.
Question : What will straight bladed stabilisers in soft formations tend to do.
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Drill a better hole at less vibrations
Drill a faster hole.
Washout the hole and induce vibration
If that's what town wants then that's what they get.
Question : If ROP doubles, what is the bit/bottom hole energy requirement, in theory?
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Who cares, size of nozzles don't make a hoot of a difference.
To clean the bit/bottom of the hole as well, it would need to double.
3-5hhp per square inch.
Doesn't really matter in OBM only in water based.
Question : What best describes oil and gas safety in your view?
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A mangement system that works to control all accident loss.
A 'injury oriented' management system designed to protect people
A system that assures client makes as much profit as possible
Sod management look after no 1, yourself, first and foremost.
Question : Maintain top hole verticality (<1deg) through hard ground, 15-20m thick?
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Bit, Motor, on a slick aassembly, drills faster, straighter!.
Stiff, rigid, stabilised rotary BHA
Pilot hole first then hole open with standard BHA.
Bit of angle won't hurt or damage anything?
Question : Your are drilling with a state of the art BHA the 40m drilled has went smooth. How do you make the connection.
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Stop or slow down rotation, pick up 10-15m if not drag go for it!
Back ream the full stand as a standard practice.
Depends whos calling the shots that day as it a personal thing.
Slow down pump backream a few times dick around as normal
Question : Wiper balls on cement plugs?
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Used ONLY when we have pipe with connection recess.
Used when cement company tells us to use them
Used to interface between spacers fluid and cement
Can't afford to use them, dont ever see a need
Question : Hit a stringer, traffic lights on MWD tri-axial, lateral, and torsional sensors and are all over the place. How do I give the company their priority directive i.e. pristine hole
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Ignore the orange and red light get through this as quick as we can.
Do what ever is needed to get lights into the green to assure good hole
Depends whos calling the shots that day as it a personal thing.
Scew to oil company and their hole get as many days on the well as we can.
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