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Connectors
> DDS Connector
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DDS Connector
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Frank’s Double Drive Shoulder Connector (U.S. Patent #5810401)  A Low Cost Solution to Conductor Make-up Connector O.D. is flush with pipe O.D. Connector I.D. is flush on pipe wall thickness 1”or larger. Connector I.D. is near flush on pipe wall thickness less than 1”. Exceeds industry standards in compressive and bending strength, including X-52 pipe. Retrievable and re-usable after driving. Design allows drive forces to be carried on shoulder of union rather than threads. Easy to stab: Thread design disallows cross threading . . . No stabbing apparatus needed. Two sealing areas: Metal to metal at shoulder plus an o-ring. Interference thread holds together under vibration.
Integral Lift Sub/Protector on box end can be used with Horseshoe and Side Door Elevator. No padeyes and slings required.
The connector can be cut on the pipe or cut on an 18” segment of pipe and then welded to the pipe body.
In order to achieve higher connector strength Frank’s cuts the threads on X-70 grade material. This gives the customer the option of using grade B pipe and insuring higher connector strength.
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Casing & Handling Tools
