دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a system consisting of a beacon positioned on the seafloor to transmit an acoustic signal, a set of three or four hydrophones mounted on the hull of a floating offshore drilling vessel to receive the signal, and a position display unit to track the relative positions of the rig and the drill site. Monitoring of the display unit aids in accurate positioning of the rig over the site.

n: a device that secures, or fastens, equipment. In producing wells with sucker rod pumps, a gas anchor is a special section of perforated pipe installed below the pump. It provides a space for gas to break out of the oil. In offshore drilling, floating drilling vessels are often secured over drill sites by large anchors like those used on ships. For pipelines, a device that secures pipe in a ditch.

n: Means of holding the deadline to the derrick or substructure. Usually this is the primary element of the weight indicator

a device with slips that holds equipment in the wellbore.

n: a floating marker used in a spread mooring system to position each anchor of a semi-submersible rig or drill ship. See spread mooring system.

n: a weight installed in a tank to which the guide wires or cables for an automatic tank gauge float are attached to hold them taut and plumb.

n: the angle in degrees that a floating vessel inclines to one side or the other.

n: The organization that automatically controls the intake yield of gas cut drilling fluid according to the level changing of drilling fluid in the deaeration room.

n: The float shoe that is installed in the bottom of the casing string and can adjust the volume of drilling fluid in the casing. There is a valve in the float shoe. Only when the pressure of drilling fluid is big enough to open the valve can the drilling fl

n: 1. a partial restriction, generally a plate, placed to change the direction, guide the flow, or promote mixing within a tank or vessel. 2. a device that is seated on the bit pin, in a tool joint, or in a drill pipe float, to centralize the lower end of a go-devil while permitting the bypass of drilling fluid.

n: A replaceable metal ring inserted in the BHA (q.v.) to act as a landing collar for a survey tool.

n: a device for regulating the level of fluid in a tank. It consists of a valve connected to a hollow floating ball that, by rising or falling, shuts or opens the valve.