Coiled Tubing Glossary...

R.O.P.: An abbreviation for Rate Of Penetration, a measure of the efficiency of the DMUR process. As high a rate as possible is the goal, however, this must be achieved without excessive bit wear and/or Stall conditions or overloading of the well surface handling facilities.

Rabbit: A device pulled or dropped through pipe to test for obstructions.

Radiographic Inspection: Inspection carried out through the use of X-ray.

RAM: recirculating averaging mixer.

Rathole: A hole in the rig floor 30 to 35 feet deep, lined with casing that projects above the floor, into which the kelly and swivel are placed when the rig is not in the process of drilling.

Reel: Device to hold hoses or coiled tubing usually equipped with a rotary joint allowing for the pumping of gas and fluids through the hose or tubing.

Regular Thread: A tapered thread with a high number of threads per inch with the threads having a conical section. Similar to the NC Thread.

Regulator (Pressure): A hydraulic device that reduces upstream supply pressure to a desired (regulated) pressure. It may be manual or remotely operated and, once set, will automatically maintain the regulated output pressure unless reset to a different pressure.

Reservoir Pressure: The pressure at the face of the reservoir when the well is shut in.

Reservoir (CT): A storage tank for control fluids used to operate the well control components and other hydraulically-actuated devices.

Reservoir: A sub-surface, porous, permeable rock body where oil, gas or both are stored.

Retainer: A drillable tool consisting of a packing assembly and a back pressure valve. Used to close off the annular space between tubing or drill pipe and casing.

Retarder: chemical compound used to prolong the thickening, setting, or hardening time of oil-well cements; the opposite of an accelerator.

Returns: Anything circulated to surface.

Reverse Circulation: The process of pumping down the annulus and returning the fluid to surface through the tubing or drill pipe.

Rheology: The term to collectively describe fluid flow properties. The definition of fluids is important for all computer aided design programs.

Rig: The derrick or mast, drawworks, and attendant surface equipment of a drilling or workover unit.

Riser: A pipe through which liquid travels upwards.

Roll-on-connector: A connector where the tubing is compressed into ridges machined into the tool. Used to attach BHA's to the bottom of coiled tubing.

Rotary: The machine that provides rotational power to the kelly during drilling operations.

Roto-Jet: Patented BJ Services tool used for high pressure jetting of scale and solids in the wellbore.

Rotor: An internal component of the PDM motor. A polished metal spiral, it enables the force of fluid to be transferred into rotary motion to turn the bit. The performance of the motor is determined by the Lobe configuration of the rotor.

Roughneck: A worker on a drilling or workover rig.

Runaway: Uncontrolled ascent or descent of coiled tubing in a wellbore.

Please inform ICoTA to add a glossary term.