Method of drilling and completing wells

An assembly for completing to a target subterranean reservoir from a cased hole well, the assembly comprising:

• a work string, attached to said assembly and concentrically located within the cased hole well, said work string having a packer adapted for sealingly engaging the casing string so that an upper annulus and a lower annulus is formed in said cased hole well;
• a drilling device adapted for drilling a bore hole wherein said drilling device comprises:
• a bit adapted for rotary drilling the bore hole;
• a motor, operatively associated with said bit means, adapted for effecting rotation to said bit;
• a completion assembly, attached to said drilling means, adapted for completing said target reservoir.

A method of completing a well, the method comprising:

• positioning a work string into the well, with said work string having attached thereto a bottom hole assembly, said bottom hole assembly containing:
• a bit adapted for rotary drilling a bore hole;
• a motor, operably associated with said bit, adapted for effecting rotation to said bit;
• an orienting device, operably connected to said motor, adapted for determining the direction and location of said bit and generating a signal in response thereto;
• a logging device for evaluating the lithology of a subterranean reservoir and generating a signal in response thereto;
• and a completion assembly adapted for completing to a target reservoir;
• and wherein the method further comprises:
• circulating a fluid in said work string so that said motor effects rotation of said bit;
• drilling a bore hole through the target reservoir.