Application Number: 00114576Application Date: 2000.05.19Publication Number: 1324971Publication Date: 2001.12.05Priority Information: International: E02B7/00Applicant(s) Name: Wuhan Water Conservancy &. Hydro-Electric Power Univ.Address: Inventor(s) Name: Zhou LipingPatent Agency Code: 42206Patent Agent: xue lingAbstract The present invention relates to a drift-blocking closure method. It is characterized by that the closure material can be placed into multirow chain-connected float material Read more
Archive : choking
Temporary choking agent prepared with waste polyolefine
Application Number: 00102576Application Date: 2000.03.21Publication Number: 1267701Publication Date: 2000.09.27Priority Information: International: C09K7/02Applicant(s) Name: Petroleum Univ. (East-China)Address: Inventor(s) Name: Ding RuiPatent Agency Code: 00000Patent Agent: Abstract During the construction of oil and gas well, temporary blocking agent containing oil soluble deforming particles is used to prevent damage of unstable well wall and oil reservoirs. The present Read more