دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pl: the tongs latched on the drill pipe joint hanging in the totary by the slips, used to keep the pipe from turning as the makeup or breakout tongs (the lead tongs) apply torque to make up or break out the tightened tool joint connection. Compare lead tongs.

n: A tong suspended in the derrick, normally on the drillers right, used to hold box end of the tool joint while the pin end is loosened and unscrewed. Also called a make-up tong, as it is moved to pin end to tighten the joint to the recommended torque after

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 tool joint box which has been subjected to a torque which has resulted in permanent enlargement of the box diameter. This normally occurs adjacent to the box sealing shoulder.

n: a marking on the pin and the box of a tool joint that gauges the amount of metal that can be safely removed when

a selected reference point for comparing performance.

n: an elevator that is bored to match the 18-degree taper of a tool joint.

n: the female section of a connection. See tool joint.

n: The female section of a tool joint。

the female part of the connection.

n: see tool joint.

n pi: threads on the female section, or box, of a tool joint. See tool joint.

n: The female screw of tool joint.

the treats in the box or female connection.

n: a solid cylindrical body pointed at the bottom and equipped with a tool joint at the top for connection with a jar. It is used to make an opening in a collapsed casing and drive it back to its original shape.

n: The tool of requiring casing with box thread at the top. The bottom presents pyramid.

n: an elevator that is bored to match a square shouldered tool joint. collar locator n: a logging device used to determine accurately the depth of a well;the log measures and records the depth of each casing collar, or coupling, in a well. Since the length of each joint of casing is written down, along with the number of joints of casing that were put into the well, knowing the number and depth of the collars allows an accurate measure of well depth.