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Vibration and Earthquake Isolation

Rubber-seal-adaptor

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Rubber seal adaptor

Details

Inventors: Stotler, William R.;
Assignee:
Primary Examiner: Dang; Hoang C.
Assistant Examiner:
Attorney, Agent or Firm:

A rubber seal adaptor for a well having a pipe fitting, a compression sleeve about the pipe fitting and rubber seal rings positioned about the pipe fitting so as to be compressed by the compression sleeve. A first circular groove in the bore of the compression sleeve has a conical surface such that there is a shallower portion and a deeper portion. A plurality of circular grooves extend about the periphery of the pipe fitting so as to be adjacent the groove in the compression sleeve. A plurality of steel balls are positioned within the groove in the compression sleeve to interfere with the plurality of grooves for locking the compression sleeve in a compressed condition against the rubber seal rings. The pipe fitting includes threaded ends for receiving a kelly nut and a liner.

DETAILED DESCRIPTION The present invention is directed to a lock for a rubber seal adaptor to retain the compression sleeve fixed on the pipe fitting with the rubber seal ring or rings in compression.
To this end, a lock is provided in a rubber seal adaptor employing a plurality of grooves in one of the exterior of the pipe fitting or the interior of the compression sleeve.
In the other element, a groove is arranged which has a shallower portion and a deeper portion.
Hard elements are positioned in the latter groove such that they interfere with the plurality of grooves when in the shallow portion and are clear of the plurality of grooves when in the deeper portion.
In this way, compression may be maintained by the compression sleeve against rubber seal rings positioned about an associated pipe fitting.
Accordingly, it is an object of the present invention to provide an improved rubber seal adaptor for wells.
Other and further objects and advantages will appear hereinafter.

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