Certifications of materials on physical and chemistry properties.

1. 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.

2.

The control valves, pressure gauges, and chokes assembled at the top of a well to control the flow of oil and gas after the well has been drilled and completed.

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An extension from the blowout preventer assembly used to direct control the flow of well fluids from the annulus to the choke.

1.

A pipe attached to the blowout preventer stack out of which kick fluids and mud can be pumped to the choke manifold when a blowout preventer is closed in on a kick.

2. a high-pressure pipe leading from an outlet on the bop stack to the backpressure choke and associated manifold.

During well-control operations, the fluid under pressure in the wellbore flows out of the well through the choke line to the choke, reducing the fluid pressure to atmospheric pressure.

In floating offshore operations, the choke and kill lines exit the subsea bop stack and then run along the outside of the drilling riser to the surface.

The volumetric and frictional effects of these long choke and kill lines must be considered to control the well properly.

An accessory attached to the top of the casing to facilitate cementing of the casing.

It has passages for cement slurry and retain chambers for cementing wiper plugs.

To take rams out of a blowout preventer and replace them with rams of a different size or type.

When the size of a drill pipe is changed, the size of the pipe rams must be changed to ensure that they seal around the pipe when closed (unless variable-bore pipe rams are in use).

A device inserted in a flow line to regulate the rate of flow.

A slurry of portland cement and water and sometimes one or more additives that affect either the density of the mixture or its setting time.

The portland cement used may be high early strength common (standard), or slow setting.

Additives include accelerators (such as calcium chloride), retarders (such as gypsum), weighting materials (such as barium sulfate), lightweight additives (such as bentonite), or a variety of lost circulation materials (such as mica flakes).

A short threaded nipple screwed into the open end of the coupling and over the threaded end of casing to protect the threads from dirt accumulation and damage.

It is made of steel or plastic.

Also called thread protector.

Abbreviation: circulating bottomhole temperature

A tubular section of pipe that is threaded inside and used to connect two joints of casing.

1.

The ramp at the side of the drilling rig where pipe is laid to be lifted to the derrick floor by the catline or by an air hoist.

2.

Any elevated walkway
3. a long, rectangular platform about 3 ft [0.9 m] high, usually made of steel and located perpendicular to the vee-door at the bottom of the slide.

This platform is used as a staging area for rig and drillstring tools, components that are about to be picked up and run, or components that have been run and are being laid down.

A catwalk is also the functionally similar staging area, especially on offshore drilling rigs, that may not be a separate or raised structure.

A special tool with a rubber packer or lead seal that is used to repair casing.

When casing is damaged downhole, a cut is made below the damaged casing, the damaged casing and the casing above it are pulled from the well, and the damaged casing is removed from the casing string.

The tool is made up and lowered into the well on the casing until it engages the top of the casing that remains in the well, and a rubber packer or lead seal in the tool forms a seal with the casing that is in the well.

The casing-patch tool is an over-shot-like device and is sometimes called a casing overshot.

The location of the bottom of a string of casing that is cemented in a well.

Typically, a casing shoe is made up on the end of the casing at this point.

A device fitted into a junk basket and acting as a trap door to retain the junk