Rotary drill bits including bearing blocks

A rotary drill bit assembly for subterranean drilling, comprising:

• a bit frame comprising a plurality of blades, a plurality of cutters disposed on the plurality of blades, and at least one receptacle located in at least one blade of the plurality and opening onto a rotationally leading side of the at least one blade;
• and
• a bearing block formed separately from the bit frame and received at least partially within the at least one receptacle, the bearing block comprising a body including an interface surface and a rubbing surface comprising at least one rubbing area for contacting a subterranean formation during drilling, and further comprising one or more cutter pockets in the body located proximate a rotationally leading side of the body as mounted to the bit frame and having additional cutters located therein;
• wherein the interface surface and the at least one receptacle are configured for complementary attachment.

A rotary drill bit assembly for subterranean drilling, comprising:

• a bit frame comprising a plurality of blades, a plurality of cutters disposed on the plurality of blades, and at least one receptacle located in at least one blade of the plurality;
• and
• a bearing block formed separately from the bit frame and secured at least partially within the at least one receptacle, the bearing block comprising a body including an interface structure in substantially complementary engagement with surfaces of the at least one receptacle and further including a rubbing surface comprising at least one rubbing area for contacting a subterranean formation during drilling;
• the bearing block further comprising one or more cutter pockets located proximate a rotationally leading side of the body as mounted to the bit frame.

A rotary drill bit assembly for subterranean drilling, comprising:

• a bit frame comprising a plurality of blades, a plurality of cutters disposed on each of the plurality of blades, at least one receptacle located in at least one blade of the plurality of blades and at least another receptacle located in another blade of the plurality of blades;
• and
• a bearing block secured at least partially within the at least one receptacle, and at least another bearing block secured at least partially within the at least another receptacle, each bearing block comprising a body including an interface structure in substantially complementary engagement with surfaces of the at least one receptacle and a rubbing surface comprising at least one rubbing area for contacting a subterranean formation during drilling;
• wherein the bearing block and the at least another bearing block are formed separately from the bit frame and mutually joined proximate radially inner ends thereof.