The invention provides an API oil sleeve thread sealing
grease composite. The components of the composite include 40-50 percent of basic
grease, 5-10 percent of dimethyl
silicon oil, 16.5-20 percent of crystalline
graphite powder, 6-9 percent of polyfluortetraethylene, 0.5-1.0 percent of expansion
graphite powder, 1-2 percent of white
carbon black, 3-4 percent of
sericite in
powder, 3-4 percent oflight
calcium carbonate and 10-15 percent of
tin bronze powder according to the percentage accounting for in the weight of the sealing
grease composite. The invention also provides a preparation method of the API oil sleeve thread sealing grease composite. The invention has the beneficial effects that among the components of the sealing grease composite,
synthetic oil is taken as a substitute formineral oil, and therefore the low temperature fluidity of the basic grease is improved to facilitate the
brush application in winter. The addition of high performance antirust to the basic grease ensures that
pipe threading does not
rust when oil sleeves and pipes are stored outside in long term. Without
zinc powder added but with the consumption of
copper powder increased and other wear-resistant materials added, the high temperature
lubricity of the grease is guaranteed and the
pipe threading of the oil sleeves and pipes is prevented from thread gluing when screwing together. With novel high efficiency sealing materials added in the components of the sealing grease composite, the leak tightness of the grease is guaranteed.