Well cap assembly

A cap assembly for sealing an open top end of a well casing or an open end of another pipe comprising:

• a thick top plate for mounting on the top end of the well casing or on the open end of another pipe,
• a bottom plate spaced apart from the top plate,
• an upper expansible gasket immediately beneath the top plate,
• an upper clamping plate beneath and abutting the bottom of the upper expansible gasket,
• a lower expansible gasket on the bottom plate,
• a lower clamping plate on the lower expansible gasket spaced apart from the upper clamping plate,
• a plurality of sleeves extending between the upper and lower clamping plates for maintaining a fixed spacing between the clamping plates,
• bolts extending through the top plate, the upper expansible gasket, the upper clamping plate, the sleeves, the lower clamping plate, the lower expansible gasket and the bottom plate, and
• nuts on the bolts,
• whereby, when the nuts are tightened on the bolts, the top plate moves towards the upper clamping plate to compress the upper expansible gasket causing it to expand radially outwardly to create a seal at the open top end of the casing or at said open end of another pipe and the bottom plate moves toward the lower clamping plate to compress the lower expansible gasket, causing it to expand radially outwardly to create a seal at a location beneath and spaced apart from such open top end of the well casing or said open end of another pipe.