Title: Inflatable packer

Abstract: The invention comprises an inflatable packer comprising a tubular mandrel having a port extending radially therethrough. An elastomeric valve element is resiliently urged against the exterior of the mandrel to cover the port. A generally tubular packer body surrounds the mandrel and comprises a pair of longitudinally spaced apart heads, one of which is longitudinally slidable on the mandrel, and a tubular radially expandable packer element interposed between the heads. Fluid communication is provided between the radially outer side of the said port and a fluid reception chamber. The packer body is operatively associated with the chamber and responsive to fluid pressure therein to radially extend the packer element.

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Inventors: Sanford, Lawrence (Houston, TX, US)

Application Number: 788418
Filing Date: 1977-04-18
Publication_date: 1979-08-07
Assignee:
Primary Class(es): 277/333
Other Classes:
US Patent Ref:

2231282	Feb, 1941	Norris	277/34.
2695065	Nov, 1954	Baker et al.	277/34.
3044553	Jul, 1962	Bradley	277/34.

Other Refs:
Primary Examiner: Smith, Robert I.
Assistant Examiner:
Attorney: Browning, Bushman & Zamecki