I. Introduction A bell guide set is used for minor-diameter fishing tool to carry out fishing operation in the large-diameter tubing, which can guide the fishing jar to enter into the fishing tool, and can be used as the centralizer of the pulling tool in inclined shaft and for pigging operation in tubing. II. General Technical Parameters Size /Tubing SizeFishing neckConnection PN. 2-3/8″1.375″15/16-10UNW33-01.06.00 2-7/8″1.375″15/16-10UNW33-01.02.00 3-1/2″1.75″1-1/16-10UNW33-01.03.00 4-1/2″2.313″1-1/16-10UNW33-01.07.00 Note. More customized parts are available upon request. III. Structural Features The tool is composed of upper contact and guide cylinder, the structure is simple and it is used easily and conveniently. The top of the upper contact is a standard finishing neck and external threads (or quick male joint), and there are some internal threads at the bottom to connect with the fishing tool; the guide cylinder has a large horn mouth and its exterior has flowing grooves to connect with the upper contact. When using it, connect the pulling tool, overshot or spear with the upper contact, screw on the guide cylinder, and then the assembly is finished. Finally, connect the fishing tool with the bottom of the tool string, and then the operation can be carried out. Wireline Pulling Tools pdf website:http://www.rxwirelinetools.com/wireline-pulling-tools/