Abstract: A running tool for use in the insertion of an object such as a casing hanger into a subsea well includes a body and a hollow mandrel moveable within the body. Engagement dogs are supported within the body and are moveable to engage the object, the mandrel having a first part and a transition part, the transition part being shaped to cause out-ward movement of the dogs when the mandrel is in a given position within the body and to allow movement of the dogs for position of the mandrel spaced form the given position. The tool has an emergency release feature wherein the transition part is releasably attached to the first part by shear pins which shear in response to a sufficient increase in pressure within the mandrel to allow the transition part to separate from the first part.

Abstract: A connecting device for mating and connection on the sea bed of first and second pipelines having first and second pipe ends at the connection point, is shown. The connecting device includes a first connecting part retaining the first end; a second submersible connecting part retaining the second end and a connector arranged between the connecting parts for final connection between the pipe ends. A guiding device engages with a guiding structure during a lowering motion of the second connecting part towards the first connecting part and pivots the second connecting part into coarse alignment of the second pipe end in a direction towards the first pipe end such that the first and second pipelines are brought to align with each other. An adjacent ramp structure with abutment surfaces and a guiding mechanism cooperate with the second connecting part and contribute to fine alignment of the pipe ends.

Abstract: A well head system for application in sub sea well exploration comprising a well head (23) having a well head housing secured to a well casing, at least one valve stack, e.g. a BOP (1) located atop said well head (23). The valve stack is removably locked on a well template (15) supporting said well head by a plurality of locking devices (7). Also described is a locking device comprising two opposite clamping arms (19) hingedly attached to a main frame (21). The Main frame is slidable relative to a spindle (17) and can be selectively secured to the spindle (17).

Abstract: A vertical connector composed of three main components; one stationary connector part on a submerged connecting point, one mobile connector part intended for submerging and connecting to the stationary connector part and a connector which subsequent to the mating of the connector parts locks the connector parts together into permanent sealing connection. The stationary connector part has an upwards projecting pipe boss, and the mobile connector part has integrated, internally shielding and guiding means to assist the entering of the mobile connector part onto the stationary connector part.

Abstract: A releasable guidepost for use on the seabed together with a fixed subsea structure is shown. The guidepost assists during lowering of a component from the surface of the water to the subsea structure to obtain a focused landing of said component at a predetermined location. The guidepost includes an upward (in the position of use) projecting end designed for engagement with the lowered component. The guidepost is of a light weight shell construction, in order to increase buoyancy during lowering thereof through the sea by use of an ROV. The light weight shell construction defines a cavity filled with a non-collapsible buoyancy material in at least part of the guidepost.

Abstract: A tool for subsea installation and testing of wellhead modules such as Xmas trees and similar equipment, from a ship using a ship crane. The tool includes a subsea unit that includes a connector for releasable connection to subsea wellhead modules or equipment, means for positioning and means for testing, and a connector for electric power and electric and/or optical control.

Abstract: A subsea electric actuator comprises an electric motor and a telescopic drive connection (8) from the motor to a drive unit (10, 11, 12) which can be moved to and fro and converts rotary motion of the connection to linear motion of an actuating stem (5). A return spring (14) is operable on the drive unit to urge the actuating stem towards a datum state. An electromagnetic latch (15) is operative when set to maintain the drive unit in a predetermined position so as to decouple the action of the return spring whereby the stem can be advanced and retracted relative to the drive unit free from the action of the return spring. De-energization of the latch allows the return spring to operate on the drive unit to return the actuating stem to the datum state. Various forms of electromagnetic latch are described.

Abstract: Subsea heating assembly, comprising a component interface cable (9) in association with a subsea component (7?) to be heated. The component interface cable receives power from an electric power source. The power source comprises an induction coupler (100) with core rings which surround an alternating current carrying source cable (5), and a winding cable (107) wound around the core ring The winding cable connects to the component interface cable. The induction coupler comprises an upper section (100a) with first core parts (101a) and a lower section (100b) with second core parts (101b). The winding cable is arranged in the upper section. The first core parts are aligned with second core parts when the upper section is landed on the lower section. The upper section is removable from the lower section.

Abstract: A cap having a stinger adapted to be inserted into a bore of a subsea well element. The stinger includes locking means for locking to a profile in said bore, which locking means include a plurality of locking dogs. The locking dogs exhibit a large inclination face and a small inclination face, and are adapted to be actuated in a radial direction by an actuation sleeve. The small inclination face is divided by a slot, in which slot the large inclination face is arranged. A cam is arranged on the actuation sleeve and is adapted to extend into said slot. Alternatively, the small inclination face is divided by a cam arranged on the locking dog, on which the large inclination face is arranged, which cam is adapted to extend into a slot in the actuation sleeve.

Abstract: Force-dampening arrangement (100) for dampening forces between two interconnectable parts in a tube string, of which interconnectable parts a lower part (101) is connected to the upper end of a string element (105, 3a) extending into a subsea well (5) and an upper part (103) is suspended from a floating surface installation (1) through at least one suspension element (3b) extending up to said surface installation. The force-dampening arrangement (100) is connected to the tube string above a string-portion (3a) extending into said subsea well, and below at least a portion of said suspension element (3b). The force dampening arrangement (100) exhibits an upper and lower section (109, 111) that are vertically movable in relation to each other, thereby yielding for impact forces between said interconnectable upper and lower parts (103, 101) resulting from vertical heave movement of said portion of suspension elements (3b) moving vertically in respect of the string element (3a).

Abstract: An SZ laying machine for umbilical/power umbilical is described. Starting from an input end the machine includes: a first die receiving and collecting a first set of elongate elements substantially rectilinear from respective supplies of elongate elements, a second static die which receives and collects a second set of elongate elements substantially rectilinear from respective supplies of elongate elements and this second set is closed together with the first set into an assembled bundle, at least one supporting means which keeps the assembled bundle radially in place; a revolving device able to torsional rotate the bundle back and forth in an oscillating SZ manner, and a tape or band winding apparatus which in immediate proximity to the revolving device applies band or tape circumferentially onto the SZ laid bundle of elongate elements.

Abstract: A subsea direct electrical heating assembly adapted to heat a hydrocarbon conducting steel pipeline (1) arranged subsea. The assembly comprises a direct electrical heating cable (3) extending along and being connected to the steel pipeline (1) and a power transmission cable (7) receiving electric power from a power supply (5) which is arranged onshore or at surface offshore, and which feeds the direct electrical heating cable (3). The subsea direct electrical heating assembly comprises a power conditioning arrangement (100) arranged at a subsea location, in a position between the power transmission cable (7) and the direct electrical heating cable (3). The power transmission cable (7) extends from the offshore or onshore power supply (5) and down to the power conditioning arrangement (100).

Abstract: A clamp connector emergency release tool designed for subsea operations, when normal release of a subsea clamp connector (14) is not possible, is shown and described. The tool is adapted to be handled and operated remotely by a work class ROV tool. The tool includes a clamp connector (14) adapter housing (7) arranged to engage with and connect to the clamp connector (14) body, a rotatable hole saw (11) mounted on the housing (7), a rotary motor (1) in driving connection with the hole saw (11) and a piston (3) and cylinder assembly (4,5). The piston (3) and cylinder assembly (4,5) enables advancing the rotatable hole saw (11) into the clamp connector (14) body around its jack screw, in order to separate the jack screw together with a threaded portion of said clam connector (14) in order to separate the jack screw from the clamp connector (14) body.

Abstract: A tubing hanger (1) landing in a tubular element (101), having a coupling assembly (11) for hydraulic coupling between the tubing hanger (1) and the element. A coupling element (17) moves radially between an outer coupled position and an inner non-coupled position. An actuation element (25) with a contact surface (25f) exerts an outward actuation force onto an inner actuation surface (17a) of the coupling element. The actuation element comprises two actuation sections (25x, 25y) exposed to a outward force from an actuation arrangement (27). The contact surface (25f) has a distance the actuation sections. The actuation element moves in the radial outward direction so that the movement of at least one of the two actuation sections (25x, 25y) stops after the radial movement of the contact surface (25f) stops. The contact surface (25f) movement halts as the coupling element (17) reaches the coupled position.

Abstract: An assembly of subsea equipment (1) and a plurality of subsea devices (2) each of which is individually mountable on and separable from the subsea equipment wherein each device includes a respective stab connector (4) for establishing electrical connection with the equipment and further has a respective terminal connector (5) for a jumper lead, each device having at least dual redundancy whereby connection through the respective jumper terminal can substitute for the connection though the respective stab connector.

Abstract: A subsea assembly comprises a first structure (1) including a plurality of substantially parallel guide posts (4) and a second structure (2) comprising a support and depending therefrom a plurality of tubular receptacles (12) each positioned for fitment on a respective one of the guide posts. At least one of the receptacles includes a plurality of longitudinally disposed semi-elliptical springs (15) disposed to engage the exterior of the respective guide post (4) and thereby to axially centre the receptacle with respect to the guide post. In a converse arrangement at least one of the posts (4) carries a plurality of longitudinally disposed semi-elliptical springs (15) disposed to engage the interior of the respective receptacle (12) and thereby to axially centre the receptacle with respect to the guide post.

Abstract: A method of draining at least one liquid collector in a system for separating and collecting liquid contained in gas from a reservoir, wherein the liquid collector is connected to an outlet from a compressor, and a recirculation circuit between the outlet of the compressor and an inlet from the reservoir to a liquid separator to which the one liquid collector is connected downstream thereof, and which outlet is connected downstream to a transport pipe. The method comprises raising the pressure of the liquid in the e liquid collector to a higher pressure than the pressure in the inlet pipe or the transport pipe, and draining the liquid in the liquid collector upstream either to the inlet pipe or directly to the liquid separator via a first drain line, or alternatively downstream to the transport pipe via a second drain line.

Abstract: An arrangement on board a vessel to be able to strap at least one cable to a pipeline during continuous and contemporary deployment of the strapped pipe bundle into the sea is shown. The arrangement includes at least a strapping machine which is arranged to be moved forward together with the cable and pipeline in order to perform a strapping operation in concert with the forward advancement thereof. The strapping machine is also moveable rearwards relative to the cable and pipeline for the repositioning to the next strapping operation such that the application of a strap or straps takes place intermittently under the continuous deployment of the pipe bundle. Means for continuous motorized advancement of the respective pipes and cables towards the strapping machine and further into the sea is also arranged.

Abstract: Subsea anchor (1) having a hollow cylindrical body (3) extending down from a top part (13). The anchor has a top aperture (15) and a top hatch (17) which is adapted to close and open the top aperture (15). The cylindrical body (3) is adapted to penetrate into a seabed. The area of said aperture (15) is at least 30% of the corresponding cross section area encircled by the cylindrical body (3).

Abstract: A subsea wellhead assembly includes a production casing hanger defining a series of passageways from an annulus between a production casing string and an outer casing to a region that can communicate, for example, by way of an isolation sleeve, with a production tree. The passageways extend to the interior of the casing hanger. A positionally adjustable sleeve fits within the casing hanger and carries exterior seals that are disposed so that for a first position of the adjustable sleeve within the casing hanger, fluid passage through the series of passageways is blocked, and for a second position of the sleeve within the casing hanger, the fluid passage is allowed. The adjustable sleeve can be operated by a simple tool through the production tree.