few uncommon terms

1) casing hanger:

1. n. [Well Completions]

The subassembly of wellhead that supports the casing string when it is run into the wellbore. The casing hanger provides a means of ensuring that the string is correctly located and generally incorporates a sealing device or system to isolate the casing annulus from upper wellhead components.

**Casing hanger features , refer to the diagram:

Attached to the topmost joint of Casing, the casing hanger incorporates features to suspend the casing string and provide hydraulic isolation once engaged in the casing bowl.

2) wellhead:

1. n. [Drilling]

ID: 1661

The system of spools, valves and assorted adapters that provide pressure control of a production well.

See: casing string, casinghead, day rate, Texas deck

2. n. [Well Completions]

ID: 2892

The surface termination of a wellbore that incorporates facilities for installing casing hangers during the well construction phase. The wellhead also incorporates a means of hanging theproduction tubing and installing the Christmas tree and surface flow-control facilities in preparation for theproduction phase of the well.

3) casinghead:

1. n. [Drilling]

ID: 1270

The adapter between the first casing string and either the BOP stack (during drilling) or the (after completion). This adapter may be threaded or welded onto the casing, and may have a flanged or clamped connection to match the BOP stack or wellhead

1) Christmas tree:

1. n. [Drilling]

The set of valves, spools and fittings connected to the top of a well to direct and control the flow of formation fluids from the well.

See: cellar, formation fluid, shut-in bottomhole pressure, shut-in pressure

2. n. [Well Completions]

An assembly of valves, spools, pressure gauges and chokes fitted to the wellhead of a completed well to control production. Christmas trees are available in a wide range of sizes and configurations, such as low- or high-pressure capacity and single- or multiple-completion capacity



.

production tubing

1. n. [Well Completions]

ID: 2773

A wellbore tubular used to produce reservoir fluids. Production tubing is assembled with other completion components to make up the production string. The production tubing selected for any completion should be compatible with the wellbore geometry, reservoir production characteristics and the reservoir fluids.

Squeeze cementing:

The process of forcing a cement slurry through holes or splits in the casing or liner. Once the slurry encounters a permeable formation, the cement solids are filtered out of the slurry as the liquid phase is forced into the formation matrix in the form of cement filtrate. A properly designed squeeze-cement operation will fill the relevant holes and voids with cement filter cake that will cure to form an impenetrable barrier

2)Monkey board

the small platform high in the derrick of a rig occupied by the derrickman when guiding stands of drill pipe and casing to and from storage racks .

3)top drive

Powerful electric motor that rotates whole drill-string from top down.

www.seismaresearch.com/glossary/exploration4.html

a drilling system where a motor is attached to the top of the drill string in the rig derrick to impart a rotary action directly, rather than use a Kelly and rotary table.
www.topic-energy.com/page.asp

3)doghouse

Small house located on the rig floor or nearby that is used as an office for the driller and as a storage place for small tools.

www.oilonline.com/index.php

4)Cat line

· A hoisting or pulling line powered by the cathead and used to lift heavy equipment on the rig. See cathead.

www.energyweb.net/gas/jargon/default.asp

· a heavy line used for general hoisting in oil well drilling; also called cathead line.
www.jamarco.com/09a_Rope/rope_glossary.htm

5)choke

1. n. [Well Completions]

ID: 2593

A device incorporating an orifice that is used to control fluid flow rate or downstream system pressure.

Chokes are available in several configurations for both fixed and adjustable modes of operation. Adjustable chokes enable the fluid flow and pressure parameters to be changed to suit process orproduction requirements. Fixed chokes do not provide this flexibility, although they are more resistant toerosion under prolonged operation or production of abrasive fluids.