Tool, system and method for delivering and pressure testing a downhole plug in one trip

A plug delivery and pressure test tool for delivering a plug to a wellbore or tubular and pressure testing the plug in a single trip, the tool comprising:

• an uphole end and a downhole end;
• a sealing element;
• a pressure adjustment means;
• and
• a plug attachment means located at or near the downhole end;
• wherein the plug attachment means is configured to carry a selectively expandable plug to a desired location in the wellbore or tubular and selectively release the plug from at or near the downhole end of the tool;
• the sealing element is configured to seal against an internal surface of the wellbore or tubular in use, thereby creating an isolated volume in use, between the sealing element and the plug;
• and
• wherein the pressure adjustment means is configured to decrease the pressure in the isolated volume by moving fluid from the isolated volume to an upper fluid volume) above the sealing element to create an underbalance in the isolated volume, thereby negatively pressure testing the plug in use.