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A PUP JOINT OF ALLOY STEEL WHICH IS USED TO ADJUST THE LENGTH OF THE DRILL STRING TO THE ELEVATION OF ROTARY TABLE FOR EASY SURFACE HANDLING AND DRILLING PRACTICES. THEY UNDERGO THE SAME STRESSES AS DRILL PIPE AND THEIR PERFORMANCE DEPENDS PRIMARILY ON THEIR SUPERIOR MECHANICAL PROPERTIES.

AN AUTO-RELEASE FIRING DEVICE FOR ATTACHING TO GUNS THAT CONTAIN EXPLOSIVES FOR PERFORATING A WELL. IT IS USED TO PERFORATE A WELLBORE AND SIMULTANEOUSLY RELEASE GUNS INTO A RATHOLE. THE FIRING DEVICE IS IN THE FORM OF A HOLLOW, SEAMLESS TUBE MADE OF COLD ROLLED CARBON STEEL WITH A CEV OF 0.36 TO 0.41. IT HAS NO OTHER MECHANICAL FEATURES. IT IS USED TO IGNITE THE EXPLOSIVES USING WEIGHTED IMPACT AND IS ACTIVATED BY JARRING OR DROPPING A WEIGHTED BAR OR PRESSURE RELEASE ON THE TOOL STRING. THE TUBE IS AVAILABLE WITH THREE SIZES, HAVING AN OUTER DIAMETER OF 74.17 MM, 85.7 MM OR 108 MM AND A LENGTH OF 0.61 M. THE TUBE IS THREADED.

NON MAGNETIC LOW ALLOY STEEL BARS, SEAMLESS AND BORED. WITH INTERNAL DIAMETERS OF 57.15MM TO 82.55MM. WITH EXTERNAL DIAMETERS OF 120.65MM, 165.10MM. WILL BE FURTHER WORKED AND USED IN THE DOWNHOLE DRILLING INDUSTRY FOR OIL.

LOW ALLOY STEEL BARS, SEAMLESS AND BORED. WITH INTERNAL DIAMETERS OF 57.15MM TO 82.55MM. WITH EXTERNAL DIAMETERS OF 120.65MM, 165.10MM. WILL BE FURTHER WORKED AND USED IN THE DOWNHOLE DRILLING INDUSTRY FOR OIL.

OIL DRILL PIPE, A PIECE OF EQUIPMENT USED IN THE DRILL STRING. IT IS HOLLOW, THICK-WALLED, STEEL PIPING THAT IS USED ON DRILLING RIGS AND HORIZONTAL DRILLING TO FACILITATE THE DRILLING OR A WELLBORE. THE PRODUCT IS A SINGLE PIECE TOOL MANUFACTURED FROM HIGH-STRENGTH ALLOY STEEL (AISI 4145).