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Title: Composite drill pipe

A composite pipe segment is formed to include tapered in wall thickness ends that are each defined by opposed frustoconical surfaces conformed for self centering receipt and intimate bonding contact within an annular space between corresponding surfaces of a coaxially nested set of metal end pieces. The distal peripheries of the nested end pieces are then welded to each other and the sandwiched and bonded portions are radially pinned. The composite segment may include imbedded conductive leads and the axial end portions of the end pieces are shaped to form a threaded joint with the next pipe assembly that includes a contact ring in one pipe assembly pierced by a pointed contact in the other to connect the corresponding leads across the joint.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [5]
  1. Fountain Valley, CA
  2. (Mission Viejo, CA)
  3. Huntington Beach, CA
  4. (Anaheim, CA), Josephson
  5. Anaheim, CA
Publication Date:
OSTI Identifier:
985726
Report Number(s):
7,458,617
US patent application 10/952,135
DOE Contract Number:
FC26-99FT40262
Resource Type:
Patent
Research Org:
Advanced Composite Products & Technology, Inc. (Huntington Beach, CA)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION