Abstract: A fluid pump including a fluid end body having a plurality of interconnected fluid paths, a plurality of valves located within the plurality of interconnected fluid paths and a plunger located within at least one of the plurality of interconnected fluid paths to push a first portion of the volume of fluid through a first section of the plurality of interconnected fluid paths and from a second fluid port during a push stroke to push a second portion of the volume of fluid through a second section of the plurality of interconnected fluid paths and from the second fluid port during a back stroke. Each of the plurality of valves is movable between an open position and a closed position to form the first section and the second section.

Abstract: A drill stem has a testing tool and a drill bit. To drill, the drill stem is rotated and weight is applied to the bit from the surface. To test a formation, the drill stem is left in the borehole. Compressed gas purges mud from the drill stem. The testing tool has upper and lower collars. The lower collar has a valve seat therein. A valve member is dropped from the surface down inside of the drill stem to seat in the valve seat. When the valve member seats, the lower collar is unlatched from the upper collar, and a piston drives fluid into an inflatable packer to set the packer. With the well shut in, the drill stem test can be initiated. The valve member can be lowered on a wireline and can be selectively removed or placed in the valve seat, wherein alternating shut in and flow periods for the drill stem test can be conducted. In addition, the testing tool can be used in combination with a circulating sub, which circulating sub has a bypass valve that is actuated by a dead man.

Abstract: A nipple is provided downhole as part of a tubing (drill string or production) string. The nipple has an interior passage with recesses therein and a seat. A data probe attached to a wireline traverses inside of the tubing from the surface to the nipple. The data probe forms a valve that seats in the nipple so as to shut in the well and allow formation fluid pressure to build. A first latch deploys into a recess in the nipple to retain the probe in place against the formation pressure. A bypass is provided so as to equalize pressure across the data probe, when the probe is to be released. The bypass is kept closed by a second latch that deploys into another nipple recess. When the probe is to be retrieved to the surface, the bypass is opened by unlatching the second latch, thereby allowing pressure to equalize. The probe is unseated by unlatching the first latch. The probe has instrumentation and a sampling chamber which can be brought to the surface during flow periods of a test.

Abstract: A nipple is provided downhole as part of a tubing (drill string or production) string. The nipple has an interior passage with recesses therein and a seat. A data probe attached to a wireline traverses inside of the tubing from the surface to the nipple. The probe has a seal that seats inside of the nipple. The probe shuts in the well to allow formation fluid pressure to build. A first latch deploys into one of the recesses to retain the seal in place against the pressure. A bypass around the seal is provided. The bypass is kept closed against the pressure by a second latch that deploys into the other nipple recess. When the probe is to be retrieved to the surface, the bypass is opened to allow the pressure across the seal to equalize. The bypass is opened by unlatching the second latch. The seal is unseated by unlatching the first latch. The first and second latches are connected in series so as to operate sequentially, with the first latch deploying before the second latch.