ANCHOR Russian patent published in 2009 - IPC E21B23/00 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to anchors designed for adhesion with walls of well and for further transmitting of well equipment forces onto them. It is the technical purpose of the invention to increase reliability of the design and to facilitate possibility to install the anchor in a well both by the method of rotation of flow string and by the method of axial displacement of flow string depending upon incline of sections of the surveyed well. The anchor consists of a rod with stops, of a rigidly secured to the rod adaptor with a cone and slots, of wedging screw-thread dies designed to travel relative to the cone and interacting with a pusher, of a mounted on the rod friction lantern equipped with braking planks, and of a movable shaped lock in form of a ratchet bushing and a branch with responsive ratchet teeth on a lower end and with inclined slits on its side surface for interacting with pins of the friction lantern. The braking planks of the friction lantern are made on external surface with teeth lugs at angle φ to lengthwise axis; the rod is equipped with inclined slots made at angle to one another and united with a horizontal slot; also the branch is spring loaded relative to a case of the lantern, while the inclined slits on side surface of the branch turn into horizontal ones.

EFFECT: increased reliability of design and facilitating possibility to install anchor in well both by method of rotation of flow string and by method of axial displacement of flow string depending upon incline of sections of surveyed well.

5 dwg