دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a tubular device placed in a vertical position, either inside or outside a larger vessel, and through which well fluids are conducted before they enter the larger vessel. A boot aids in the separation of gas from wet oil. Also called a flume or conductor pipe. 2. a large pipe connected to a process tank to provide a static head that can absorb surges of fluid from the process tank. Also called surge column.

n: generally, the first string of casing in a well. It may be lowered into a hole drilled into the formations near the surface and cemented in place;it may be driven into the ground by a special pile driver (in such cases, it is sometimes called drive pipe);or it may be jetted into place in offshore locations. Its purpose is to prevent the soft formations near the surface from caving in and to conduct drilling mud from the bottom of the hole to the surface when drilling starts. Also called conductor pipe, drive pipe.

n: See conductor pipe.

n: 1. see conductor casing.2. a boot, or flume.

n: A short string of large-diameter casing set to support the surface formations. The conductor pipe is typically set soon after drilling has commenced since the unconsolidated shallow formations can quickly wash out or cave in. Where loose surface soil exis

the first string of casing run, usually to keep rocks or dirt out of the wellbore. It is usually not cemented in place. It may be jetted in, driven in, drilled in or installed in an excavated hole.

n: see conductor casing.

n: the metallic pipe which is keyed in the near-surface weak formation and used to prevent the surface layer
collapsing and separate the groundwater in near-surface



the conductor pipe.

n: tool used to drive the conductor pipe into the ground. The single-acting diesel is the most popular. as it has the most foot -pounds of energy for the weight of the hammer. Other types of hammer include impact and vibrating.

n: a tool used at the bottom of the drillpipe when the conductor pipe is being jetted into position (this method of running the conductor is only suitable where the surface formation can be washed away by the jetting action)

n: a special threadless tool joint for large-diameter pipe, especially conductor pipe, sometimes used on offshore drilling rigs. When the box is brought down over the pin and weight is applied, a locking device is actuated to seat the joints. Because no rotation is required to make up these joints, their use can save time when the conductor pipe is being run. Squnch Joint is a registered trademark of the manufacturer.

n: the first string of casing (after the conductor pipe) that is set in a well. It varies in length from a few hundred to several thousand feet (metres). Some states require a minimum length to protect freshwater sands. Compare conductor pipe.

n: A large-diameter, relatively low-pressure pipe string set in shallow yet competent formations for several reasons. First, the surface casing protects fresh-water aquifers onshore. Second, the surface casing provides minimal pressure integrity, and thus en