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Mr. Erik Milito - The House Committee on Natural Resources ...

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ISOLATING POTENTIAL FLOW ZONES DURING WELL CONSTRUCTION 11<br />

EMW<br />

FG<br />

FIT<br />

HPHT<br />

LOT<br />

LCM<br />

LWC<br />

LWD<br />

LTP<br />

mD<br />

MD<br />

MLSH<br />

MMS<br />

MWD<br />

NAF<br />

ND<br />

NU<br />

OBP<br />

PBR<br />

PIT<br />

PP<br />

ppge<br />

psi<br />

PWD<br />

ROP<br />

RP<br />

SCP<br />

SGS<br />

SPE<br />

TOC<br />

TVD<br />

WOB<br />

WOC<br />

equivalent mud weight<br />

frac gradient<br />

formati<strong>on</strong> integrity test<br />

high pressure, high temperature<br />

leak-off test<br />

lost circulati<strong>on</strong> material<br />

loss of well c<strong>on</strong>trol<br />

logging while drilling<br />

liner top packer<br />

millidarcy<br />

measured depth<br />

mud line suspensi<strong>on</strong> hanger<br />

Minerals Management Service<br />

measurement while drilling<br />

n<strong>on</strong>-aqueous fluid<br />

nippling down<br />

nippling up<br />

over balanced pressure<br />

polished bore receptacle<br />

pump-in tests<br />

pore pressure<br />

pounds per gall<strong>on</strong> equivalent density<br />

pounds per square inch<br />

pressure while drilling<br />

rate of penetrati<strong>on</strong><br />

Recommended Practice<br />

sustained casing pressure<br />

static gel strength<br />

Society of Petroleum Engineers<br />

top of cement<br />

true vertical depth<br />

weight <strong>on</strong> bit<br />

waiting <strong>on</strong> cement<br />

4 Barriers<br />

4.1 General<br />

Barrier elements can be classified as either physical or operati<strong>on</strong>al. With the excepti<strong>on</strong> of operati<strong>on</strong>al procedures<br />

related to the use of cement as a physical barrier element, operati<strong>on</strong>al barriers are not covered in this standard.<br />

Barriers c<strong>on</strong>tribute to total system reliability; total system reliability is the probability of barrier success, or <strong>on</strong>e minus<br />

the probability that all barriers to unc<strong>on</strong>trolled flow al<strong>on</strong>g a particular path will fail simultaneously. <str<strong>on</strong>g>The</str<strong>on</strong>g> principles,

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