FIELD: oil production, particularly for casing pipe cementing in two stages in oil and gas wells.
SUBSTANCE: clutch comprises body with cementing holes and radial channels, bush case, which forms annular cavity along with the body. Installed in the annular cavity is additional bush provided with radial channels, which communicate body interior with casing annulus of the well during well flushing and cement mortar injection at the second stage. The clutch is provided with gate installed in the body and connected to support bush resting against upper body end by shear members. The clutch also has stem plugged from below and provided with radial channels located over the plug. The plug has cylindrical recess located from outer side thereof. Spacer made as metal washers and plate-like elastic collars is arranged in the recess. In working position stem is connected with flow string through clutch with longitudinal ribs.
EFFECT: simplified structure, reduced material consumption, increased operational capability and quality.
1 dwg
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