Importance

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Abstract

There is provided a method of forming a high friction joint between a first tubular metal body and a second tubular metal body, the method comprising: selecting a first tubular metal body having a first outer face at a first end portion thereof and selecting a second tubular body having a second inner face at a second end portion thereof, the first and second faces being capable of overlap to enable the first and second tmbs to fit together; treating the first outer face of the first tubular metal body and/or the second inner face of the second tubular metal body by introducing a friction enhancing agent to at least part of one or both thereof; inserting the first end portion of the first tubular metal body inside the second end portion of the second tubular metal body such as to form a low friction joint therebetween; and moving the first end portion of the first tubular body relative to the second end portion of the second tubular body to create rubbing at the first and second faces to activate the friction enhancing agent and to thereby form said high friction joint.

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First Claim