Patent ID: 7726416

Claim:
A well drilling head system, comprising: a housing including: a sidewall structure defining a central bore configured for having a bearing assembly removably seated therein, wherein the sidewall structure includes a tapered bearing assembly seating surface within the central bore; a ram slideably mounted on the side wall structure, wherein the ram is disposed within a passage extending through the sidewall structure, wherein the ram includes a bearing assembly engaging surface; a bearing assembly configured for being disposed within the central bore of the housing, wherein the bearing assembly includes an outer barrel including a ram engagement surface configured for being engaged with the bearing assembly engaging surface of the ram and includes a tapered housing engagement surface configured for being engaged with the bearing assembly seating portion of the housing and wherein a maximum insertion depth of the bearing assembly within the housing is jointly and entirely defined by the tapered housing engagement surface and the tapered bearing assembly seating surface; and selective displacement means coupled between the ram and the sidewall structure, wherein said selective displacement means is configured for moving the ram to an engaged position in which the bearing assembly engaging surface of the ram is engaged with the ram engagement surface of the bearing assembly for forcibly urging the tapered housing engagement surface of the bearing assembly into engagement with the tapered bearing assembly seating surface of the housing and a position in which the ram is disengaged from the bearing assembly for allowing the bearing assembly to be removed from within the central bore.