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Glossary


A


Accelerator

Device used to store potential energy and convert it to kinetic energy when the  power jar fires. An accelerator is what generates the impact force by accelerating the toolstring stem.



C


Compact toolstring

Short toolstring that can contain all the standard toolstring items such as rope socket , accelerator, stem,power jar, spang jar etc. Mainly suitable for wells with 4 1/2" or larger tubulars


Completions

String of tubulars and other compoents through which the hydrocarbons are produced to surface.


Crossover

Means of connecting tools with differing connections together to form a complete string.



D


Data acquisition

Gathering of data generally from deep within the well bore.


Debris Removal

Removal of unwanted debris / deposits from the well bore.


Deviated Wells

Wells who's trajectory or angle is not truelly vertical. Generally deviation is not highly significant for wireline intervention until it excedes 50 degree from the vertical.


Downward Jarring

The use of wireline toolstring to impart a downward shock load on tool or object within the well bore. Downward becomrs less effective as the well deviation increases.



E


e-line

Cable with electric conduit used to lower equipment into well bore.



F


Fish Neck

Distinct profile on the uppermost section of a tool used for running or recovery of equipment within well bore


Fishing Tools

Equipment used in the recovery of stuck tools or objects from the well bore.


Flow Control

Equipment used in the management of hydrocarbon flow within the completion string.



G


Gun orientation

The rotational position of perforating gun charges



H


HPHT

High pressure / High Temperature wells. Generally used for wells with temperatures exceding 350F and wellhead pressures of 10k psi or greater



I


Isolation Plug

Device used to isolate a section of the completion string or well bore.



J


Jarring

Applying a shock load impact through manipulation of toolstring components.



K


Knuckle Joint

A tool that can be included within a toolstring to provide some articulation to allow tools to travel freely pasted kinks or bends within the wellbore



L


Leak Detection

Detecting a leak path from within the completion producing bore to annulus



M


Mechanically-set

A tool set by purely mechanical manipulation of toolstring.


Monobore

A completion string with minimal restrictions. Generally the only restriction being through the sub-surface safety valve.



N


NPT

National Pipe Thread



O



P


Permanent Plugs

Plugs that are not designed to be recovered from the wellbore. These can as a rule be milled out if required.


Plug

Device to form a pressure retaining barrier within wellbore.


Plug System

Series of tools to provide a downhole barrier.


POOH

Pull Out of Hole - anagram used to shorten offshore reporting.



Q



R


Redress kit

Parts used to re-dress a tool after use.


Roller Systems

Tools that utilise rollers to enhance intervention in deviated wells.


Rope Socket

Uppermost tool of the toolstring. Used to make the wire / cable connection to the toolstring.



S


SIM

Sealing Integrity Management


Slickline

Single strand of wire used to lower tools into wellbore.


Spud

The initially step in drilling a well.


Straddles

Devices used to isolate leaks within the tubing string or isolate producing zones but still provide a flow path through the straddle bore.


Swivel

Component of a toolstring that allows free rotational movement.



T


Toolstring

String or series of tools connected together for the purposes of lowering into a wellbore.


Tungsten Stem

Stem filled with heavy tungsten carbide. Used to provide extra weight to a toolstring whilst minimising overall length. Generally not suitable for heavy jarring.



U


Upward Jarring

Impact force that is applied in an upward direction.



V



W


Well bore clean up

Removal of debris / solids from a wellbore. Often conducted prior to running the completion in a newly drilled well.


Well Intervention

Gaining access to the wellbore to conduct remedial work.


WellGlide

a fluted roller centraliser sub, designed by Peak to assist in the conveyance of a wireline toolstring into high angle, deviated wells.


Wireline

Generally implies a multistrand cable used for well intervention.



Z


Zonal Isolation

Isolation of a specific area or section of the producing section of the well bore.



other


3D

Three dimensional eg. 3D animation