Abstract: An apparatus and method for transporting a tool through a drill string in slimhole drilling operations is disclosed. A fluid passage such as a groove is formed in the inner wall of the pipe joint to permit the passage of fluid from one pipe section to an adjacent pipe section as a tool is transported through the pipe joint. In one embodiment of the invention, the tool can comprise a core barrel for retrieving a core sample from the wellbore.

Abstract: An apparatus for the hydrostatic testing of pipe and pipe connections is provided. The apparatus features an elongated tool body which can be inserted into the interior portion of a connected series of pipe joints or the like. The device is inserted into a pipe joint in proximity to a connection between two joints which has been "made up" by means of, for example, a threaded connection. The device utilizes a pair of expanding flexible packing seals which expand and sealably contact the pipe wall forming a pressure test area between the seals and at the pipe joint to be tested. Fluid pressure supplied through a central conduit in the tool body flows into the pipe between the packing seals through a nozzle injector in the tool body in proximity to the joint which is to be tested. The test fluid then first expands the pair of flexible seals and fills the pipe with water upon which a desired test pressure is exerted.