Abstract:
A technique enables determination of changes in length of a conveyance (36) deployed between a surface vessel (24) and a subsea installation (22). The technique allows information to be obtained on the relationship between length of conveyance spooled out or spooled in at a surface location and the depth and/or speed of an intervention well tool deployed in a well. The information can be used to determine the actual depth of the well tool deployed in the well for the intervention operation.
Abstract:
A system, program product, and method for monitoring and managing a plurality of marine riser assets is provided. The system can include one or more floating vessels each carrying a shipboard computer, a plurality of riser assets to be tracked and monitored, a riser asset identification sensor positioned to identify select riser assets being deployed to establish a riser string, one or more riser joint instrument modules positioned along the length of the riser string to provide riser asset load data, a centralized data warehouse to store riser asset identification and loading data for riser assets deployed at multiple remote vessel locations, and a riser lifecycle management server and riser lifecycle management program product adapted to monitor riser asset conditions, issue automated service alerts based on actual use information, maintain routine and non-routine maintenance records, manipulate and categorize riser assets, and automatically generate an accurate riser system configuration as was actually deployed for any particular drilling/completion operation.
Abstract:
Assembly for drilling and logging, comprising a device for electro pulse drilling (EPD device), at least one device to receive acoustic signals generated by the EPD device, distinguished in that the assembly further comprises at least one device to receive electromagnetic signals generated by the EPD device. Method for drilling and logging, and device for electro pulse drilling.
Abstract:
Ce dispositif de surveillance de la tenue d'une conduite flexible (2) de transport de fluide sous pression au niveau d'un embout terminal (1), ladite conduite comportant notamment une gaine intérieure de pression (6), des nappes de fils d'armures de traction (7) et une gaine extérieure (8) solidarisées à l'embout, est caractérisé en ce qu'il comprend des moyens de surveillance de l'évolution d'un phénomène lié à la désorganisation des nappes d'armures consécutive à une rupture de plusieurs fils d'armure de traction à l'intérieur de l'embout. Ces moyens de surveillance sont des moyens (20) de détection d'une augmentation de la torsion de la conduite au voisinage de l'embout.
Abstract:
A method for logging, controlling, or monitoring subsea well or group of wells through a path not within production tubing is disclosed. Preferred embodiments of the present invention allow logging tools, wire rope, optic fibers, electrical cables, monitoring and measuring instruments and other items known to those skilled in the art of oil and gas production to be disposed into the well without interfering with the flow path through the production string. In another aspect of the invention, a preferred embodiment includes the mooring or tethering of an instrument pod over the sub-sea well. The instrument pod is designed provide on-board data storage, data processing, data receiving, and data transmission equipment, such that data from the well can be transmitted back to a receiving network where said data may be stored and processed into useful information for reservoir operators.
Abstract:
A drilling system for drilling subsea wellbores includes a tubing-conveyed drill bit (130) that passes through a subsea wellhead. Surface supplied drillng fluid flows through the tubing (121), discharges at the drill bit, returns to the wellhead through a wellbore annulus (122), and flows to the surface via a riser (160) extending from the wellhead. A flow restriction device (164) positioned in the riser restricts the flow of the returning fluid while an active fluid device controllably discharges fluid from a location below to just above the flow restriction device in the riser, thereby controlling bottomhole pressure and equivalent circulating density ("ECD"). Alternatively, the fluid is discharged into a separate return line (206) thereby providing dual gradient drilling while controlling bottomhole pressure and ECD. A controller (180) controls the energy and thus the speed of the pump in response to downhole measurement(s) to maintain the ECD at a predetermined value or within a predetermined range.
Abstract:
A method of seafloor survey using a pontoon moving at short time intervals on the surface of a deep sea of strong tidal current, which can be applied economically and accurately in a simple constitution requiring a smaller sea surface area, as compared with a conventional method. To attain this method, a plurality of omnidirectional screw propellers (42) are provided on the bow and stern of a self-propelling pontoon (30). The motors (43) for these propellers (42) are controlled by a position controller (49) comprising position measuring unit (45), gyrocompass (46), an anemoscope-anemometer (47) and a control arithmetic unit (48), whereby the self-propelling pontoon (30) is automatically retained in a predetermined site. After a casing pipe (12) has been fixed to the self-propelling pontoon (30) via a pipe support unit (29) and extended and set up substantially perpendicularly on a survey site, a boring machine (13) is driven as the self-propelling pontoon (30) is retained on a predetermined site by an automatic retaining system, in order to excavate the sea bottom (10) by a boring pipe (14).
Abstract:
A pressure measuring device will measure pressure in a subsea tubular member. The device includes a stationary unit mounted to the exterior of the tubular member and a movable unit that will be lowered into position next to the stationary unit whenever pressure is to be monitored. The stationary unit has a strain gage which will monitor pressure by measuring strain in the tubular member. The stationary unit has a light emitter which will emit pulses corresponding to pressure measured. The stationary unit has a photocell which will receive a light beam from the movable unit. The light beam and photocell provide power for the stationary unit. The movable unit has a receiver which receives any light pulses from the light emitter and correlates them to a pressure measurement.
Abstract:
A method of calibration of an in-line monitoring instrument in a subsea installation (6), comprises using an umbilical (4) for transportation of a sample fluid from the subsea installation (6) to a topside installation (2) and/or for transportation of a reference fluid from the topside installation (2) to the subsea installation (6); comparing measurements of the sample fluid or the reference fluid by the in-line monitoring instrument with measurements of the same fluid obtained previously or subsequently by topside instruments; and adjusting the calibration of the in-line monitoring instrument in the subsea installation (6), if required, based on the results of the comparison of measurements.
Abstract:
A fluid level monitoring system comprising: a subsea well comprising a wellbore and a wellhead; a subsea well isolation device installed on the wellhead; and a fluid level monitoring device and associated methods.