A clamp assembly for connecting at least one downhole tool to a tubing in a well, the tubing having an exterior surface, the clamp assembly comprising: a first clamp part having a first end and a second end, the first end having at least one connection / capable of receiving and securing the at least one downhole tool, the first clamp part having a first side and a second side extending between the first end and the second end, the first clamp part having a first inner clamp surface extending between the first side and the second side, and a first external surface extending between the first side and the second side; a second clamp part having a third end, a fourth end, a third side, and a fourth side with the third side and the fourth side extending between the third end and the fourth end, the second clamp part also having a second inner clamp surface extending between the third side and the fourth side, and a second external surface extending between the third side and the fourth side; a hinge assembly connecting the first side to the third side and configured to permit the first clamp part and the second clamp part to be moved to a closed position where the second side is positioned adjacent to the fourth side and an open position where the second side and the fourth side are spaced a distance apart to receive the tubing; a fastener connecting the second side to the fourth side when the first clamp part and the second clamp part are in the closed position; wherein, the first inner clamp surface and the second inner clamp surface are sized and dimensioned to grip the exterior surface of the tubing when the first clamp part and the second clamp part are in the closed position; and characterized in that the hinge assembly and the fastener are adapted to permit longitudinal movement between 1/32 of an inch and 1/4 of an inch of the first clamp part relative to the second clamp part to form a self-tightening action. a first clamp part having a first end and a second end, the first end having at least one connection / capable of receiving and securing the at least one downhole tool, the first clamp part having a first side and a second side extending between the first end and the second end, the first clamp part having a first inner clamp surface extending between the first side and the second side, and a first external surface extending between the first side and the second side; a second clamp part having a third end, a fourth end, a third side, and a fourth side with the third side and the fourth side extending between the third end and the fourth end, the second clamp part also having a second inner clamp surface extending between the third side and the fourth side, and a second external surface extending between the third side and the fourth side; a hinge assembly connecting the first side to the third side and configured to permit the first clamp part and the second clamp part to be moved to a closed position where the second side is positioned adjacent to the fourth side and an open position where the second side and the fourth side are spaced a distance apart to receive the tubing; a fastener connecting the second side to the fourth side when the first clamp part and the second clamp part are in the closed position; wherein, the first inner clamp surface and the second inner clamp surface are sized and dimensioned to grip the exterior surface of the tubing when the first clamp part and the second clamp part are in the closed position; and characterized in that the hinge assembly and the fastener are adapted to permit longitudinal movement between 1/32 of an inch and 1/4 of an inch of the first clamp part relative to the second clamp part to form a self-tightening action.