PERFORATING GUN WITH ECCENTRIC ROTATABLE CHARGE TUBE

摘要

A perforating gun includes an orienting device retained in a carrier and a charge tube rotatably connected to the orienting device. The orienting device misaligns a center axis of the charge tube with a different second axis such that gravity can cause the charge tube to rotate about the different second axis. The charge tube does not rotate about the center axis of the charge tube while the charge tube rotates about the different second axis.

主权项

1. A perforating gun, comprising:
a carrier; a charge tube disposed inside the carrier; a plurality of shaped charges positioned along the charge tube; and at least one orienting device positioned on each opposing end of the charge tube, wherein each orienting device includes:
an end plate retained in the carrier;a decentralizer fixed to the charge tube, wherein the decentralizer includes a cylindrical hub and a cylindrical mandrel, and wherein a center axis of the hub and a center axis of the mandrel are eccentrically aligned; anda bearing rotatably connecting the decentralizer to the end plate, wherein the decentralizer rotates relative to the end plate.