دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The designing programe of casing layer, casing size, setting depth, bit diameter and cementing heigh.

n: 1. a string of pipe used to case open hole below existing casing. A liner extends from the setting depth up into another string of casing, usually overlapping about 100 feet (30.5 metres) above the lower end of the intermediate or the oil string. Liners are nearly always suspended from the upper string by a hanger device. 2. a relatively short length of pipe with holes or slots that is placed opposite a producing formation. Usually, such liners are wrapped with specially shaped wire that is designed to prevent the entry of loose sand into the well as it is produced. They are also often used with a gravel pack. 3. in jet perforation guns, a conically shaped metallic piece that is part of a shaped charge. It increases the efficiency of the charge by increasing the penetrating ability of the jet. 4. a replaceable tube that fits inside the cylinder of an engine or a pump. See cylinder linel:

n: a string of the casing that only extends back to inside the previous casing shoe and not back to surface as other casing strings do.

n: the devices used to set permanent tools in a producing well;the assembly is lowered into the well on wireline. When the desired setting depth is reached, an explosive is detonated to set the tool.

n: a device that prevents the entry of fluids into the tubing string while it is being lowered into the well. At the desired packer setting depth, a surface pump is started to elevate the tubing pressure and open the pump-out slug. With the plug open, formation fluids can enter the tubing. pump plunger n: see sucker rod pump.

n: a feature on some downhole production tools that allows the operator to select the setting depth of the tools.

n: the depth at which the bottom of the casing extends in the wellbore when it is ready to be cemented.

n: The depth of the casing or liner reaching in the well.