Abstract: A pipe coupling assembly and method for protecting control lines is disclosed wherein a shoulder modification is made on the pipes to prevent breakage of a control line protector clamp. Particularly, the present invention relates to a coupling assembly for protecting a control line comprising a first pipe including a first stop surface, a second pipe longitudinally connected to the first pipe, a clamping device connected to the first pipe and the second pipe, the clamping device including a first clamping end connected to the first pipe and a control line receiving portion, and a control line extending along the length of the first pipe and the second pipe, the control line being positioned within the control line receiving portion of the clamping device. Additionally, the first stop surface is positioned at a predetermined angle relative to the first pipe to prevent breakage of the clamping device.