ADP

Aluminium drill pipe

AFE

Authority for expenditure

API

American Petroleum Institute

B/U

Bottoms up

BHA

bottom hole assembly

BHOsub

Bottom hole orientation sub

BHP

Bottom hole pressure

BOD

Basis of Design

BOP

Blow out preventer

CBL

Cement bond log

CHH

Casing head housing

CLP

Choke line pressure

CMC

Carboxymethylcelluose

DC

Drill collar

DDR

Daily drilling report

DIMS

Drilling information management system

DMS

Drilling management system

DP

Drill pipe

DS1

Drill string standard

DST

Drill string test

DSV

Down hole safety valve

DSV

Drilling supervisor

ECD

Equivalent circulating density

ECP

External casing packer

ECPICV

External casing packer internal control valve

EMW

Equivalent mud weight

ESD

Emergency shut down

FG

Formation pressure equivalent density

FIT

Formation integrity test

FMS

Flush mounted slips

FMS

Formal method statement

FRAC

Fracture

GOR

Gas oil ratio

HAZOP

Hazard and operability analysis

HCR

High closing ratio

HP

High pressure

HPE

Hydrostatic pressure equivalent of 1bbl mud in well

HPHT

High pressure high temperature

HWDP

Heavy weight drill pipe

IBOP

Internal blow out preventer

ID

Internal diameter

IFG

Influx density

ISP

IWCF

International well control forum

JSA

Job Safety Analysis

KOP

Kick off point

KPI

Key performance indicator

KT

Kick tolerance

LCM

Lost circulation material

LMRP

Lower marine riser package

LOT

Leak off test

LP

Low pressure

LTI

Lost time incident

LWD

Logging while drilling

MAASP

Maximum annular allowable surface pressure

MD

Measured depth

MMSCF/D

Million standard cubic feet per day

MODU

Mobile offshore drilling unit

MPI

Magnetic particle inspection

MPLT

MR

Migration rate

MST

Magnetic steering toll

MW

Mud weight

MWD

Measurement while drilling

NDT

Non destructive testing

NMDC

Non-magnetic drill collar

NPT

Non productive time

OBM

Oil based mud

OD

Outside diameter

OIM

Operation’s installation manager

OWE

Offshore well engineer

P&IDS

Piping and instrumentation diagram

PBR

PBR

Polished ball receptacle

PCWD

Pressure control while drilling - rotating diverter / head

PDC

Polycrystalline diamond compact

PDHG

PDM

Positive displacement mud motor

PFD

Process flow diagram

POB

Personnel on board

POBM

Pseudo oil based mud

POOH

Pull out of hole

ppg

Pounds per gallon

PSI

Pounds per square inch

PTW

permit to work

PVT

Pit volume totaliser

RDM

Regional drilling manager

RIH

Run in hole

ROV

Remotely operated vehicle - robotic submarine

RPM

Revolutions per minute

RTTS

retrievable packer

SCR

Slow circulation rate

SCSSV

Sub surface safety valve

SF

Safety factor

SICP

Shut in casing pressure

SIDPP

Shut in drill pipe pressure

SPM

Strokes per minute

SSP

Stand pipe pressure

TCL

Tubing conveyed logging

TFA

Total force area

TIW

Texas iron works

TOC

Top of cement

TRSSSV

Tubing retrievable sub surface safety valve.

TVD

Total vertical depth

TVDRKB

Total vertical depth rotary Kelly bushing

UBD

Under balanced drilling

UBHOsub

Universal bottom hole orientation sub

ULSEL

Ultra-long spaced electronic log

VBR

Variable bore rams

W O H

Weight on hook

W&W

wait & weight well kill method

WBM

Water based mud

WEG

WOB

Weight on bit

WWD

World wide drilling