Oil & Gas Glossary 1.0

2. the pressure-sealing element of a stripper blowout preventer See stripper head.

2. the pressure-sealing element of a stripper blowout preventer See stripper head.

1. a rubber disk surrounding drill pipe or tubing that removes mud as the pipe is brought out of the hole.

2. a stripper head.

A rubber or rubber-like device on a special rod (a swab), which forms a seal between the swab and the wall of the tubing or casing.

1. a well nearing depletion that produces a very small amount of oil or gas, usually ten barrels per day or less.

3. a column wherein absorbed constituents are stripped from absorption off. The term is applicable to columns using a stripping medium, such as steam or gas.

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.

A blowout prevention device consisting of a gland and packing arrangement bolted to the wellhead. It is often used to seal the annular space between tubing and casing.

Any material (i.e., paper, cork, asbestos, or rubber) used to seal two essentially stationary surfaces.

A device closed around the rods when the well may flow through the tubing while the rods are being pulled. It is a form of blowout preventer.

Rubber seals that energize by pressure only, not mechanical force; plugs and wash tools

Balls made of nylon, hard rubber, or both and used to shut off perforations through which excessive fluid is being lost.

The set of dense rubber, washer-shaped pieces encircling a packer, which are designed to expand against casing or formation face to seal off the annulus.

A nitrile rubber used throughout the oilfield as an elastometer seal, i.e., in O-rings, V-rings.

A rubber plug used in primary cementing operations to displace cement slurry from the casing into the borehole annulus.

An elastic material made of synthetic rubber or plastic; often the main component of the packing material in blowout preventers and downhole packers.

A preventer having a unit of packing material whose closure depends on well pressure coming from below. It is used primarily to strip pipe through the hole or allow pipe to be moved with pressure on the annulus.

A downhole tool, composed primarily of slips, a plug mandrel, and a rubber sealing element, that is run and set in casing to isolate a lower zone while an upper section is being tested or cemented.

(n) a device with an elastomer packing element that depends on pressure below the packing to effect a seal in the annulus. Used primarily to run or pull pipe under low or moderate pressures. This device is not dependable for service under high differential pressures. Also called a stripper.

A hollow, rubber-faced cylinder mounted on a hollow mandrel with a pin joint on the upper end to connect to the swab line. A check valve that opens upward on the lower end provides a way to remove the fluid from the well when pressure is insufrficien5t to support flow.

A rubber-bodied, plastic- or aluminum-cored device used to separate cement and drilling fluid as they are being pumped down the inside of the casing during cementing operations. A wiper plug also removes drilling mud that adheres to the inside of the casing.

1. to force pipe or tools into a high-pressure well that has not been killed (i.e., to run pipe or tools into the well against pressure when the weight of pipe is not great enough to force the pipe through the BOPs). Snubbing usually requires an array of wireline bocks and wire rope that forces the pipe or tools into the well through a stripper head or blowout preventer until the weight of the string is sufficient to overcome the lifting effect of the well pressure on the pipe in the preventer. In workover operations, snubbing is usually accomplished by using hydraulic power to force the pipe through the stripping head or blowout preventer.