Abstract: A transformable circulation tool for reversing the path of drilling fluid at the drill bit without removing the drill string from the borehole annulus is provided by a substantially hollow body having a chamber with external ports disposed between a section of the body having a through passage and a by-pass passage in combination with a diverter mounted on a telescoping member having means for engaging the body during drilling and disengaging the body for rotation of the diverter with respect to each of the passages. A seal is rotatably mounted to the substantially hollow body between the ports to divide the well borehole into an upper conventional flow portion and a lower portion where the flow of the drilling fluid can be reversed upon command from the surface.

Abstract: In a combination for the drilling of a gas, oil, water and/or steam well comprised of a well hole, which is being drilled, well casing, which extends at least part of the way down the well hole, rotatable drill pipe, which extends down the well hole to the bottom thereof and which contains a passageway through the center thereof, a drill bit attached to the bottom of the drill pipe, means for rotating the drill pipe and the drill bit, and means for forcing a fluid, such as, drilling mud, down the passageway of the drill pipe to and through the drill bit, an annulus being formed by the region between the well casing and side of the well and the drill pipe, the fluid exiting out the annulus, the improvement which comprises a reverse circulating tool or device located in the casing, the device comprising a cylindrical main body, means for attaching the device to the top portion of the drill pipe, means for attaching the device to the bottom portion of the drill pipe, a first passageway in the main body communica

Abstract: A Y-ram tester for the testing of the blowout prevention apparatus of a gas or oil well. There is a well casing, a well casing segment mounted thereon, and a blowout preventer which has a pair of pipe rams and is mounted on the well casing segment. The rams are adapted to tightly seal around the two pipes. A test plug is mounted in the well casing in a manner so that the test plug would not move any further into the well casing. Two pipes extend through the center passage of the blowout preventer to a position past the pair of rams. There is also means for injecting water at high pressure into the cavity formed by the central passage of the blowout preventer below the pair of rams, the central passage of the well casing segment and the central passage of the casing of the well casing above the test plug.

Abstract: Device for use in the drill string used to drill an oil well. The device has a cylindrical body, four passageways located lengthwise through the cylindrical body, and a Y-shaped bottom member, which has a Y-shaped passageway therethrough. The two upper arms of the bottom device communicate with two oppositely-located passageways in the cylindrical body. Such Y-shaped passageways communicate with the bottom portion of the drill pipe. A top stem, which has a longitudinal passageway thereof and which has four side ports. Such longitudinal passageway communicates with the top portion of the drill pipe. A collar is rotatably positioned around the four ports of the top stem and is slidably removable from the top stem. The collar has two side L-shaped arms, with a passageway in each arm. Retainer means which is detachably positioned around the top of the top stem. The cylindrical body tightly and rotable fits within the well casing.