PIPE CENTERING AND WASHING APPARATUS

摘要

A pipe centering and washing apparatus comprises a body having an axial bore sized to accommodate a drill string, and pipe moving means. The pipe moving means comprises a ram housing having a radial bore, a pipe ram movable along the radial bore, and a ram actuator to move the pipe ram along the radial bore. When the pipe centering and washing apparatus is mounted on the wellhead, the axial bore is in fluid communication and substantially aligned with the wellhead's internal bore. The pipe centering and washing apparatus is operable between a retracted position and a centering position. When a drill string is present in the axial bore, the pipe moving means is operable to position the drill string in the axial bore between an off-centered position and a substantially centered position.

主权项

1. A pipe centering and washing apparatus for use with a wellhead having an internal bore, the pipe centering and washing apparatus comprising:
a body having an axial bore being sized to accommodate a drill string; a pipe moving means, comprising:
at least one ram housing having a radial bore;at least one pipe ram movable along the radial bore; andat least one ram actuator to move the pipe ram along the radial bore; wherein, when the pipe centering and washing apparatus is mounted on the wellhead, the axial bore is in fluid communication and substantially aligned with the wellhead's internal bore; wherein the pipe centering and washing apparatus is operable between a retracted position and a centering position; and wherein, when a drill string is present in the axial bore, the pipe moving means is operable to position the drill string in the axial bore between an off-centered position and a substantially centered position.