DEVICE FOR HEATING PREVENTOR DURING WINTER PERIOD IN PERMAFROST ROCKS AREA Russian patent published in 2007 - IPC E21B36/00 E21B33/06 

FIELD: drilling equipment.

SUBSTANCE: device contains unit for generation of gas flow, represented in form of compressor, and system for heating gas flow. System for heating gas flow consists of two units: unit for preliminarily heating air flow by means of exhaust gases of diesel motor and unit for main heating of air flow. Unit for preliminary heating of air flow contains cylindrical thermo-isolated body, equipped with branch pipes for inlet and outlet of heat exchange gases. Ribbed cylindrical heat exchanger is mounted in the body, on the surface of which coil serpentine is mounted. To ends of heat exchanger, vertical perforated plates are attached. Internal wall of body and external wall of heat exchanger form chamber for heating by means of exhaust gases filled with adsorbent. Unit for main heating of air flow contains body with ribbon heating element mounted therein. A pair of collapsible manifolds is connected to the body, inside which rods with coiling of ribbon heating element are mounted. System for heating gas flow is connected by flexible sleeves to native system for heating preventer, made in form of external chambers.

EFFECT: expanded technological capabilities of plant, higher ecological safety of operations.

2 cl, 1 dwg