Sealed downhole equipment and method for fabricating the equipment

A downhole tool comprising:

• an outer sleeve defining a flow passage therethrough;
• an inner sleeve defining a flow passage therethrough;
• and
• a composite body disposed in an annulus defined by the inner and outer sleeve, the composite body comprising at least a combination of a cementitious material and a resinous material, wherein the composite body prevents fluid flow through the annulus and is bonded to the inner and outer sleeves.

A downhole tool for use in a casing comprising:

• an outer case adapted to be connected in the casing, the outer case defining a flow passage therethrough;
• a check valve disposed in the outer case;
• a cement body having first and second ends disposed in an annulus defined by the check valve and the outer case for blocking flow through the annulus;
• and
• a first resin cap covering a first end of the cement body to prevent fluid in the outer case from contacting the first end of the cement body.