دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a forged or cast steel fitting for a wire rope or a strand. It has a basket with adjustable bolts that secure rope ends. bridging materials n pI: the fibrous, flaky, or granular material added to a cement slurry or drilling fluid to aid in sealing formations in which lost circulation has occurred. See lost circulation, lost circulation material.

n: a thin, transparent material made from cellulose and used as a lost circulation material. See cementing milterials.

n: The transparent membrane made by cellulose. Used for sealing material.

n pi: 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 sulphate),lightweight additives (such as bentonite),or a variety of lost circulation materials (such as mica flakes).

n: The bonding material for cementing.

n: finely shredded cellophane used as a lost circulation material for cement.

abbr: lost circulation material.

lost circulation material.

n: (LCM) a substance added to cement slurries or drilling mud to prevent the loss of cement or mud to the formation. See bridging materials.

n: materials added to the mud to control or prevent lost circulation. These material are added in varying amounts and are classified as fibre, flake, or granular.

same as lost circulation control materials.

n: unit of conductivity. Compare ohm. mica n: a silicate mineral characterised by sheet cleavage;i.e.. it separates into thin sheets. Biotite is ferromagnesian black mica. and muscovite is potassic white mica. Sometimes mica is used as a lost circulation material in drilling.

n: any of various materials, such as mica flakes or walnut hulls, that cure lost circulation. See lost circulation. lost circulation materials.

n: 1. a thickened fluid that displaces drilling mud because of the difference in viscosity and weight between the spacer and the mud. Besides carrying lost circulation materials, spacers may be weighted with various inert materials such as fly ash and barite. 2. member of a pipeline construction gang who is responsible for assuring that the exact distance between the beveled pipe ends for a welding process to be used on the joint is maintained. Spacers strike a wedge into the interface between the pipe bevels and then maneuver them to an exact, uniform distance around the entire circumference.

n: A viscous fluid used to aid removal of drilling fluids before a primary cementing operation. The spacer is prepared with specific fluid characteristics, such as viscosity and density, that are engineered to displace the drilling fluid while enabling place