Coiled Tubing Glossary...

P & A: Plug and abandon. To place a cement plug or plugs in a dry hole and abandon the well.

P.D.C.: Polycrystalline Diamond bit is a recent advance in bit design. Discs of polycrystalline man-made diamond are fixed to a tungsten carbide insert. The manufactured insert combines the hardness of diamond with the impact resistance of tungsten carbide.

P.D.M.: Positive Displacement Motor is the term to describe a motor which operates on the Moineau Principal. It is the most common design of motor used on CT DMUR operations. A metal Rotor is forced to turn inside a rubber Stator due to the force of fluid passing through it.

P.L.T.: The abbreviated term for a Production Logging Tool. Irrespective of the tools run all flow analysis operations are defined as a 'PLT'.

Packer: A downhole tool used to block the flow of fluids through the annular space between the tubing and the wall of the casing by sealing the space between them.

Pay Zone: the producing formation in an oil well.

PB: Plug back. To place cement at or near the bottom of a well to isolate everything below the plug.

Percussion Hammer: A drilling tool that delivers high frequency blows to the bit.

Perforation: A hole made in the casing, cement and formation through which formation fluids enter the wellbore.

Permanent Installation: Installation of coiled tubing left in place for the purpose of injection or production.

Permeability: A measure of the ease with which fluids can flow through a porous rock.

pH Value: A unit of measure of the acid or alkaline condition of a fluid. A neutral solution has a pH of 7. Acid solutions are below 7 and alkaline solutions are above 7.

Pill: cement plug; a portion of cement placed at some point in the wellbore to seal it.

Pin: The pin or Kemlon Pin, to give it its manufacturers name, provides a solid electrical connection from a high pressure zone to a low pressure zone. The pin is rated to 20,000 psi and consists of gold pins set in ceramic and surrounded by a metal housing complete with o-rings to provide the pressure seal across the bulkhead.

Pipe Rack: A horizontal support for tubular goods.

Pipe Rams: The rams in a well control device which are designed to seal around coiled tubing to close and isolate pressure in the annular space below the rams.

Pipe/Slip Rams: Combination rams which provide the function of a pipe ram and slip ram in one ram body.

Pitot: instrument that allows one to measure the velocity of a fluid in relation to an immobile body or a moving body of a stable fluid.

Plug Back TD: The bottom of the well.

Plug Flow: A fluid as a unit in which all shear stress occurs at the pipe wall.

Plug Valve: A valve whose mechanism consists of a plug with a hole through it on the same axis as the direction of fluid flow. Turning the plug. 90° opens or closes the valve. The valve may or may not be full-opening.

Plug: any object or device that blocks a hole or passageway (as a cement plug in a borehole).

Plunger: a sliding reciprocating piece driven by or against fluid pressure1 especially a long valveless piston used as a forcer in a force pump, as a ram in a hydraulic press.

Pod: The compartments on a bulk truck or sand truck used to carry product to the field, which can be emptied pneumatically.

Polished Rod Clamp: Fastening device to connect the polished rod to the bridle of a beam pumping unit.

Pop off Valve: A spring-loaded safety valve that opens automatically when the pressure exceeds the limits that the valve is set for.

Poppet Valve: a device that controls the rate of flow of fluid in a line or opens or shuts off the flow of fluid completely.

Porosity: The measure of pore space within a formation. The capacity of the formation to hold fluids or gas.

Portland Cement: the product obtained by grinding clinker consisting essentially of hydraulic calcium silicates, to which no additions have been made after calcination other than water and untreated calcium sulfate, except that additions not to exceed 1.0% of other materials may be inter-ground with the clinker at the option of the manufacturer.

Pounds Per Gallon: A measure of density.

Power Fluid: Pressurized hydraulic fluid dedicated to the direct operation of functions.

Pozzolan: a natural or artificial siliceous material commonly added to Portland cement mixtures to impart certain desirable properties. Added to oil-well cements, pozzolans reduce slurry weight and viscosity, increase resistance to sulfate attack, and influence factors such as pumping time, ultimate strength, and water tightness.

PPG: Pounds per gallon

Precharge: See "Accumulator Precharge"

Pressure Test, Well Control Component: The process of pressure testing internally the well control component or well control stack.

Primary Cementing: the cementing operation that takes place immediately after the casing has been run into the hole; used to provide a protective sheath around the casing, to segregate the producing formation, and to prevent the migration of undesirable fluids.

Production Casing: The last string of casing run in a well.

Proppant: An agent used to keep fractures open after fracturing fluids are returned to the wellbore. Carried into the fractures by the frac fluid these agents must have enough tensile strength to resist crushing and provide a permeable path to the wellbore for the formation fluids after the fracture heals.

PSI: Pounds per square inch.

Pumpability: the physical characteristic of a cement slurry that determines its ability to be pumped.

Please inform ICoTA to add a glossary term.