GUN BRAKE SYSTEM (GBS) TO BE USED WITH A DOWNHOLE TRACTOR IN OIL AND GAS INDUSTRIES. THE GUN BRAKE SYSTEM IS DESIGNED TO PREVENT ANY MOVEMENT OF THE PERFORATING STRING DURING PERFORATING OPERATIONS. THIS PREVENTS THE GUN FROM BEING BLOWN UPHOLE DURING UNDERBALANCED PERFORATING OPERATIONS, OR PROTECTS THE WEAKPOINT WHEN LARGER, HEAVIER GUNS ARE BEING FIRED. THIS CAN PREVENT BREAKAGE AND/OR DAMAGE TO THE CABLE, POTENTIALLY RESULTING IN EXPENSIVE AND TIME-CONSUMING FISHING OPERATIONS. THE GUN BRAKE SYSTEM ANCHORS THE GUN-STRING VIA THREE SETS OF SLIPS. THE TOOL IS RUN INTO THE WELLBORE WITH THE SLIPS RETRACTED, THEN ONCE ON DEPTH, THE TOOL IS MOTORED OPEN AND ANCHORED IN THE CASING. DURING DETONATION, ANY SHOCK FROM THE GUN (UPWARDS OR DOWNWARDS) IS TRANSMITTED THROUGH THE SLIPS TO THE CASING, SO INCREASING THE ANCHORING FORCE. THE TOOL CAN BE OPENED AND CLOSED AS MANY TIMES AS REQUIRED IN THE WELLBORE AND THE MODULAR NATURE OF THE GUARDIAN SYSTEM MEANS THAT IT CAN BE COMBINED WITH OTHER TOOLS, I.E. AN ADDRESSABLE RELEASE TOOL (ART), A VOLTAGE PROTECTION MODULE (VPM) OR POWER SWIVEL JOINT (PSJ). FISHING STRENGTH 30,000 LBS, FEEDTHRU CURRENT (MAX) 6A, PRESSURE (MAX) 15,000 PSI, BENDING LOAD 7,500 LBS.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8479 FOR MACHINES AND MECHANICAL APPLIANCES HAVING INDIVIDUAL FUNCTIONS, NOT SPECIFIED OR INCLUDED ELSEWHERE IN THIS CHAPTER. GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 8479 90 - PARTS CN CODE 847990 70 OTHER THAN PARTS OF MACHINES OF SUBHEADING 8479 89 70 TARIC 84799070 99 OTHER THAN ELSEWHERE SPECIFIED. ALSO CLASSIFIED IN ACCORDANCE WITH:- NOTE 2 (B) TO SECTION XVI HSENS (I) (7)