PLUG PACKER AND INSERTION TOOL FOR PACKER SETTING IN WELL (VERSIONS) Russian patent published in 2015 - IPC E21B33/128 E21B23/06 

FIELD: oil and gas industry.

SUBSTANCE: plug packer comprises a mandrel with a collar and cup-type seal, a blind plug, O-ring with the upper and lower thrusts, slips and cones, a retainer of compressed O-ring, a buffer bushing with a springy ring placed in its bore and interacting with circular notches at the mandrel. The cones are fixed at the mandrel by shear pins and dowels. The upper dowel is connected to the cone by a stop screw so that is may be moved to the length of O-ring compression. The upper slips are joined to the sleeve connected to the buffer bushing. At the sleeve but end there is an inner cone interacting with an outer cone at the springy ring retainer. The lower slips are joined to the shoulder of a spacer sleeve matched by its inner diameter to the collar. Under skirt of the blind plug in the collar there are openings with shear pins installed in them in order to connect the mandrel with the fixing unit at the insert tool rod. The insert tools comprise a cylindrical body with a sealed cover. In five versions the body is divided by a partition wherein there is a rod of the actuating piston. At the rod placed above the partition there is a fixing unit. According to the first version the actuating piston and a dash-pot piston mounted over it at the rod divide the over-piston cavity into an air chamber and a chamber with liquid, which are interconnected by channels with plate valves. There are openings in the body wall above the partition. The actuating piston is fixed in the body by shear pins and the body cover is connected to a rope. According to other versions inside the body there is a cylinder placed concentrically with an inner collar at the butt end. The cylinder is matched to the cover so that they form a circular cavity interconnected with a pipe string or borehole space through channels. In channels there is a slide valve or a membrane with an explosive cartridge or gas generator and equipped with an igniting fuse. The actuating piston and damping piston are placed in the cylinder. A logging cable is connected to the cover. According to the sixth version there is an electric drive placed in the body head and connected to a logging cable; the drive interacts by an actuator screw with the fixing unit.

EFFECT: simplified design and improved operational reliability of the devices.

10 cl, 7 dwg