Thread compound developed from solid grease base and the relevant preparation procedure
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United States of America Patent
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Mar 23, 1999
Grant Date -
N/A
app pub date -
Nov 4, 1997
filing date -
Nov 7, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A new thread compound for tubing, casing and sucker rods which is composed of: mineral oil (freezing point in the range from -10.degree. to -14.degree. C.), polyisobutene solution (Staudinger index J.sub..degree. 46 to 52) in mineral oil, anticorrosive additive based on organic compounds, which do not contain heavy metals and chlorinated hydrocarbons, and which is dissolved in mineral oil, modified alumino-silicate as trialkylaryl ammonium smectite, propylene carbonate density/20.degree. C. 1.189, aluminium stearate (ash from 9.5 to 11.5 wgt. parts), graphite (quality as required in API 5A3), copper flake (quality as required in API 5A3), lead powder (quality as required in API 5A3) and zinc dust (quality as required in API 5A3), and a process for its manufacture are provided. The thread compound is characterized by high resistance to temperature, pressure, extreme friction and wear.
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