The GPDS and EIS connections greatly extend the life of the joint by tolerating more OD wear because of increased torsional capacity. This additional strength provides the required torque for drilling to extended depths or in more demanding environments. Streamlined GPDS and EIS connections provide 20 to 50% more torque than API rotary-shouldered connections of the same dimensions. GPDS and EIS are proven connections that provide increased torsional capacity, promote more streamlined configurations, and tolerate more tool joint wear than standard API rotary-shouldered connections. Both connections offer a versatile alternative to standard API connection designs when higher operational torque and tool joint wear allowance are desired, and they are fully interchangeable with corresponding API NC or FH counterparts. The Grant Prideco Double Shoulder™ (GPDS™) and EIS™ connections are high-performance rotary-shouldered tool joint connections available for drill pipe ranging in size from 2⅜ to 6⅝ in.
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