Tdw Offshore Services As

Pangeo Subsea, Inc.

Jostein Aleksandersen

Harald Syse

Jacques Y Guigné

Nicholas G Pace

The present invention regards a plug () for scaling off a pipeline (), comprising a main body (), scaling means () and gripping means () arranged circumferentially around the main body () and actuation means () for operating the sealing and gripping means () where the gripping means () comprise at least one slip () with an outer surface () for contact against the pipe wall and an inner gliding surface () arranged in abutment against a first angled guiding surface (), forming an angle ? with a center axis of the plug (), so that the gripping means () when actuated is moved relative to the guiding surface () to move the slips () in a radial direction where the guiding surface () in addition is moved in a radial direction relative to the center axis of the plug ().

Plug with gripping means

A method for identifying position of acoustic source proximate sediments below the bottom of a body of water includes deploying a plurality of arrays of acoustic sensors on the bottom of the body of water. Each array includes a plurality of lines of acoustic sensors disposed in a substantially radial pattern. The arrays have a center to center distance therebetween of about twice a diameter of each of the arrays. Signals are detected from each of the sensors for a selected time period. A direction of the acoustic source with respect to each of the arrays is determined by steering a response of the sensors in each array. A range of the acoustic source is determined using the determined directions.

Method for identifying gas leaks using a stationary seabed placed steered beamformed acoustic antenna with active narrow beam transmitter interrogation capability

The present invention regards a barrier plug system () for sealing off a pipe (), comprising a plug body, a first and a second end plate surface () arranged on opposite sides of the plug body and at least one circumferential sealing means () and means () for setting the plug system (). The plug body comprises at least two separate plug body elements () movable relative each other and the at least one sealing means () is arranged abutting two opposite annular pressing surfaces () formed by the plug body, which are moved towards each other during setting of the plug system (). The pressing surfaces () are limited in the movement against each other by stop means and pre-tensioned to move toward each other by at least one tensioning device ().

Pre-tensioned sealing means arrangement

The invention regards a device for movement within a pipeline which device comprises at least one centralizing means () comprising at least two centralizing elements () arranged around the circumference of a body () of the device. The centralizing elements () are arranged to move from a retracted position to an extended position in contact with an inner wall () of a pipeline () to centralize the device.

Smartplug with wheel centralizer

A coupling according to the invention comprises a first part () and a second part (). The first part () comprises a housing () with a bore () and a slide element () arranged movable within the bore () and the slide element () has two ends (), which both end surfaces () in a disconnected state of the coupling, are exposed to a surrounding fluid around the coupling.

Smartcoupling&#x2014;non responsive

A plug for use during a pipeline laying operation for sealing off sections of the pipeline in case of water ingress. A sealing and gripping assembly is formed of slip segments around a partially conical shaped surface, the slip segments being moved by a piston/cylinder arrangement. A valve connected to a pressure vessel actuates the piston/cylinder in response to the detection of conductivity of fluid around the plug.

Plugging system for use during an offshore pipeline laying operation

The invention regards a hydraulic cylinder () or a plug comprising a hydraulic cylinder for operation of anchoring and or sealing devices, where the hydraulic cylinder comprising a cylinder chamber (), a piston head () within said cylinder chamber () forming two sub chambers (') of said cylinder chamber () one on each side of the piston head (), and a piston rod () which runs through the piston head () and said two sub chambers (&#x2032;) or only one of said cub chambers. The hydraulic power unit () for operation of the hydraulic cylinder () is situated at least partly within the parts forming the hydraulic cylinder () itself, preferably the piston head () and or the piston rod ().

Hydraulic cylinders and plug with hydraulic cylinder

A method and device for preventing water from penetrating into the rising part/intermediate section () of a pipe () when laying the pipe () on or near the seabed () by means of a pipelay vessel (), and where a plug () that seals against, travels and locks in the inside passage of the pipe () is arranged inside the pipe () between the lay vessel () and the seabed (), where during normal pipelaying the plug () is displaced in the pipe () so as to essentially maintain its relative position relative to the pipelay vessel (), and where in the event of water flowing into the pipe (), the plug () is locked in the pipe (), whereby water is prevented from filling the rising part/intermediate section () of the pipe ().

Growing community of inventors

Randaberg, Norway

Jostein Aleksandersen