Telescoping derrick

E - Fixed Constructions – 04 – H

Patent

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Details

E04H 12/18 (2006.01) B66C 23/60 (2006.01) E21B 15/00 (2006.01)

Patent

CA 2232303

A telescoping four-sided drilling derrick (20) and method or erection that is to be positioned on a drill floor (F) over a well bore and is capable of withstanding severely adverse weather, environmental or geologic conditions. The derrick (20) is in several sections and includes a bottom section (22), a top section (30) and at least one intermediate section (26, 28) all for superpositioning over the bottom section (22) to form a vertical four-sided tower. Each of the sections is composed of vertical members positioned in each of the four corners (38a-38d) of each section to thereby form a total of four faces (40a-40d) around the perimeter of each section. A window (46) is one face sufficiently large to receive consecutively therebelow at least one section. In turn each of the intermediate sections (26, 28) is inserted within the bottom section (22) for subsequent serial telescopic raising of the intermediate sections (26, 28).

La présente invention concerne un derrick de forage (20) télescopique à quatre côtés et un procédé de montage correspondant. Ce derrick (20), conçu pour être placé sur un terrain de forage au-dessus d'un trou de forage, et capable de résister à des conditions climatiques, atmosphériques ou géologiques très difficiles, est constitué de plusieurs sections, à savoir une section de base (22), une section sommet (30) et au moins une section intermédiaire (26, 28), toutes ces sections se superposant au-dessus de la section de base (22) pour former une tour verticale à quatre côtés. Chaque section est constituée d'éléments verticaux se plaçant au quatre coins (38a-38d) de chacune des sections, de façon à former un total de quatre côtés (40a-40d) en périphérie de chaque section. Une fenêtre (46) présente un côté suffisamment grand pour recevoir successivement par dessous au moins une section. Dès lors, chacune des sections intermédiaires (26, 28) s'introduit dans la section de fond (22), permettant ainsi la montée télescopique en série des sections intermédiaires (26, 28).

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