DEVICE FOR SUSPENSION AND RETENTION OF CASING STRING AT WELLHEAD WITHOUT USING HOISTING TACKLE SYSTEM OF DRILLING RIG DURING CEMENTING Russian patent published in 2024 - IPC E21B19/08 E21B19/24 E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: device relates to oil and gas industry and can be used in construction of oil and gas wells on land. Device for suspending and holding the casing at the wellhead during cementing is made in the form of a welded structure, consisting of: a base with a mounting plate, equipped with a support for orientation relative to the axis of the well, lifting table with side fixed rotary part, and replaceable spacers for column size, located in lifting table of device and made with possibility of changing flow diameter for casing string, two hydraulic cylinders, and adjustable screw supports, each equipped with locking devices. Lower parts of hydraulic cylinders and adjustable screw supports are fixed on the base, upper parts of hydraulic cylinders are fixed on lifting table. Holes for free movement of adjustable screw supports are made in lifting table. Locking device of each adjustable screw support is made with possibility of removing load from hydraulic cylinders and long-term holding of casing string by means of perception of load from it on adjustable screw supports.

EFFECT: removal of load from power devices of hoisting tackle system during operation with casing string during cementing and waiting for cement hardening.

12 cl, 7 dwg