دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to hold one section of an object such as pipe while another section is being screwed into or out of it.

v: To hold one section of pipe while another is being screwed into or out of it (as in back up tongs).

n: The chain tongs that seizure the strings when make up and breakout.

n: a cylindrical ring employed to back up (or assist) a sealing member against extrusion under temperature and pressure.

n: a check valve installed in the drill stem that allows mud to be pumped down the drill stem but prevents flow back up the drill stem. Also called a float.

n: a non-return valve joined in the pipe , it can only let the fluid into the bottom of the well from the drill pipe but cant let the fluid return into the dill pipe from the bottom

n: a drilling operation in which no fluid is circulated back up to the surface (often as a result of lost circulation). However, fluid is usually circulated into the well to cool the bit. See blind drilling.

n: drilling without drill fluid cycling out of the well

n: a device used on floating offshore drilling rigs to provide a way to actuate and control subsea blowout preventers from the rig. Hydraulic lines from the rig enter the pods, through which fluid is sent toward the preventer. Usually two pods, one yellow and one blue, are used, each to safeguard and back up the other. Also called blue pod, yellow pod.

n: anyone of several types of valve installed in the drill stem or in a top drive to prevent highpressure fluids from flowing up the drill stem and into the atmosphere. Flow is possible only downward, allowing mud to be pumped in but preventing any flow back up the stem. Also called an internal blowout preventer.

n: A valve in the drillstring that may be used to prevent the well from flowing uncontrollably up the drillstring.

a valve installed inside the drill stem to prevent flow up the inside of the pipe.

n: the process of pumping mud downward to the bit and back up to the surface in a drilling or workover operation. See normal circulation, reverse circulation. mud cleaner n: a cone-shaped device, a hydro-cyclone, designed to remove very fine solid particles from the drilling mud.

n: the procedure that pump the mud through the bit and then reture to the ground when drilling or workover.

v/n: 1. The intentional pumping of wellbore fluids down the annulus and back up through the drillpipe. This is the opposite of the normal direction of fluid circulation in a wellbore. Since the inside volume of the drillpipe is considerably less than the volum

circulating down the annulus and up the tubing.

n: a type of wireline unit in which power is transferred by means of a pulley and a belt from the left rear wheel of the wireline truck to the spool of wire that is pulled from the left side of the truck. The spool is used to run the wireline down- hole and bring it back up again.