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1. WO2007139394 - A SYSTEM FOR ACTIVE HEAVE COMPENSATION AND USE THEREOF

Publication Number WO/2007/139394
Publication Date 06.12.2007
International Application No. PCT/NO2007/000190
International Filing Date 31.05.2007
Chapter 2 Demand Filed 31.03.2008
IPC
B63B 39/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
39Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
E21B 19/09 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
19Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
08Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
09specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
B63B 35/44 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
35Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
44Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
CPC
B63B 2017/0072
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
17Vessels parts, details, or accessories, not otherwise provided for
0072Seaway compensators
B63B 39/00
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
39Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
E21B 19/09
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
19Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
08Apparatus for feeding the rods or cables
09specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
Applicants
  • NATIONAL OILWELL NORWAY AS [NO]/[NO] (AllExceptUS)
  • VON DER OHE, Christian [NO]/[NO] (UsOnly)
Inventors
  • VON DER OHE, Christian
Agents
  • OSLO PATENTKONTOR AS
Priority Data
2006252101.06.2006NO
Publication Language English (EN)
Filing Language Norvegian (NO)
Designated States
Title
(EN) A SYSTEM FOR ACTIVE HEAVE COMPENSATION AND USE THEREOF
(FR) SYSTÈME DE COMPENSATION DE PILONNEMENT ACTIF ET UTILISATION AFFÉRENTE
Abstract
(EN)
A system for active heave compensation of the running block in a drilling derrick on board a floating off shore platform comprises a double-acting hydraulic cylinder (1) which is connected to a hydraulic power unit (3) for the supply of hydraulic pressure fluid to the hydraulic cylinder (1), a control unit (6) which regulates the supply conditions of the pressure fluid to the at any time active side (A, B) of the hydraulic cylinder, the hydraulic fluid concurrently being permitted to leave the passive side (B, A) of the hydraulic cylinder. The hydraulic power unit (3) comprises a pump unit (4) which via respective conduits (9a, 9b) are directly connected to the two sides (A, B) of the hydraulic cylinder (1) in order to form a generally closed hydraulic system therewith. The hydraulic fluid delivered by the pump unit (4) to the conduits (9a, 9b) to the active cylinder side is drawn from the conduit (9b, 9a) to the passive cylinder side, while the control unit regulates the output of the pump unit. The hydraulic system further comprises an accumulator (11) which equalizes the volumetric difference between the two sides of the hydraulic cylinder when it is a common double-acting cylinder. The system may also be provided with a hydraulic transformer (23) for regeneration of hydraulic power during passive operation of the compensation system.
(FR)
Un système de compensation de pilonnement actif de l'élément mobile dans un derrick de forage embarqué sur une plateforme offshore flottante comprend un cylindre hydraulique à double action (1) qui est connecté à une unité d'alimentation haydraulique (3) destinée à fournir le fluide à pression hydraulique (1), une unité de commande (6) qui régule les conditions de fourniture du fluide de pression au côté actif à tout moment (A, B) du cylindre hydraulique, le fluide hydraulique pouvant simultanément quitter le côté passif (B, A) du cylindre hydraulique. L'unité d'alimentation hydraulique (3) comprend une unité de pompage (4) qui est reliée par l'intermédiaire de conduites respectives (9a, 9b) directement aux deux côtés (A, B) du cylindre hydraulique (1) de manière à former un système hydraulique généralement fermé. Le fluide hydraulique délivré par l'unité de pompage (4) aux conduites (9a, 9b) sur le côté du cylindre actif est extrait de la conduite (9a, 9b) sur le côté du cylindre passif, tandis que l'unité de commande régule la sortie de l'unité de pompage. Le système hydraulique comprend également un accumulateur (11) qui égalise la différence volumétrique entre les deux côtés du cylindre hydraulique lorsqu'il s'agit d'un cylindre à double action commun. Le système peut également comprendre un transformateur hydraulique (23) destiné à régénérer la puissance hydraulique pendant le fonctionnement passif du système de compensation.
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