دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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: 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.

n: I. the crown block or top of a derrick or mast. 2. the top of a piston. 3. a high spot formed on a tool joint shoulder as the result of wobble.

n: The top of the derrick containing the blockline sheaves.

high point.

n: The hollow part of shoulder of drill adapter due to pendulum.

n: a tool catched under the shoulder of the box of the drill pipe and used to pull and run the drill pipe and drill string during pulling and running the drill pipe or pipe connection

n: the space on the upper surface of the elevator where the lower end of the drilling tools is beared

n: a thin, sharp ridge around the box or the pin shoulder of a tool joint, caused by the use of boxes and pins with different sized shoulders. See radiator fin.

n: a sleeve receptacle that has a fitted male element and pins that fit into milled Jshaped slots of the sleeve. The short sides of the J-slots provide a shoulder for supporting weight on the pins of the male element. When the male element is lowered and turned relative to the sleeve, the pins slide in the slot toward the long side of the J, which is open-ended. The pins may thus be raised out, releasing weight that may be supported by the sleeve. The releasing procedure is called unjaying the tool."

n: 1. a hook-shaped wrench that fits the square shoulder of a sucker rod and is used when rods are pulled or run into a pumping oilwell. Usually used in pairs;one key backs up and the other breaks out or makes up the rod. Also called a rod wrench. 2. a slender strip of metal that is used to fasten a wheel or a gear onto a shaft. The key fits into slots in the shaft and in the wheel or gear. v: to use a cotter key to prevent a nut from coming loose from a bolt or a stud.