Abstract: A telescopic flare pipe tower supports a flare pipe several hundred feet above the base level and includes a bottom section in contact with the base that may be the ground or the platform or deck offshore. The bottom section has a door or opening through which tower section assemblies including a tower section and a flare pipe section are transported on a dolly travelling on a track and telescopically raised above the bottom section. Each tower section assembly includes a flare pipe that permits vertical movement relative to the tower section but substantially restricts lateral movement. Upon installation of the second tower section assembly below the superposed previously telescoped tower section assembly the flare pipe section may be raised by a jack positioned on the ground, the deck or other base level to move the flare pipe section up to the superposed flare pipe section for welding.

Abstract: A telescoping four-sided drilling derrick and method of erection that is to be positioned on a drill floor over a well bore and is capable of withstanding severely adverse weather, environmental or geologic conditions. The derrick is in several sections and includes a bottom section, a top section and at least one intermediate section all for superpositioning over the bottom section to form a vertical four-sided tower. Each of the sections is composed of vertical members positioned in each of the four corners of each section to thereby form a total of four faces around the perimeter of each section. A window is one face sufficiently large to receive consecutively therebelow at least one section. In turn each of the intermediate sections is inserted within the bottom section for subsequent serial telescopic raising of the intermediate sections.

Abstract: The pipe racker assembly includes a mast, a dolly assembly vertically slidably secured to the mast for vertical movement, a handling arms assembly rotatably secured to the dolly assembly and having an upper handling arm extensible to accommodate pipes of varying length and as long as 45 feet and lower arms capable of gripping pipe either from a horizontal pipe rack or from a carousel pipe rack turntable when the handling arms are rotated 90.degree. on the dolly assembly. A stabilizer is secured to the ends of the handling arms in order to allow the handling arms assembly to be supported remote from the pipe racker assembly to reduce the structural strength requirements of the assembly.