Patent ID: 7278482

Claim:
An anchor for detachably anchoring a tool in a predetermined position inside a tubular member for work to be done comprising: a single sub anchor body having a first end, a second end, an exterior surface, and an interior surface; said single sub anchor body comprising at least one longitudinal chamber; said at least one longitudinal chamber further comprising a first chamber a second chamber and a third chamber, wherein said first chamber has an internal diameter which is smaller than an internal diameter of the second chamber and/or the third chamber; said single sub anchor body comprising at least one transverse chamber, wherein the first chamber and the transverse chamber intersect with one another; at least one pressure producing propellant, said pressure producing propellant being positioned in said longitudinal chamber for activation; and at least one anchor block being slidably retained in the transverse chamber, said anchor block being driven from the transverse chamber to grippingly contact an inner surface of the tubular after activation of the pressure producing propellant, wherein the gripping contact anchors said anchor body.