Abstract:
Seal assembly sealing an annulus between an inner tubular member (5) and an outer tubular member (7), comprising a seal (50) arranged in the annulus (19) and an activation assembly (70) arranged on an axial side of the seal (50). The activation assembly (70) is axially movable in such way that it activates the seal (50) to an activated mode when moving axially towards it and wherein the seal (50) is adapted to move to a deactivated mode when the activation assembly (70) is moving axially away from it. The inner or outer tubular member (5, 7) comprises an angled shoulder (51). The seal (50) comprises an inclined sliding face (52) in abutment with the angled shoulder (51). A spring assembly (60) is arranged between the seal (50) and the activation assembly (70).
Abstract:
A rotating flow head (RFH) has a housing having an internal bore with diameter substantially equal to that of a riser and at least one flow port proximate one longitudinal end thereof. First and second arrays of radially extensible and retractable locking elements are disposed circumferentially around the RFH housing. The RFH has a bearing assembly (BA) housing having an exterior diameter selected to fit within the internal bore of the RFH housing so as to provide an annular space therein. The BA housing has profiles for engaging one of the arrays of locking elements when extended. A mandrel is rotatably, sealingly supported within the BA housing. Another end of the BA housing and the other array of locking elements have features cooperative to provide longitudinal force on the BA housing to energize a seal element disposed in the annular space when the other array is extended.
Abstract:
Well blowouts, such as happened in the PTTEPAA Montara gas well in the Timor Sea in August 2009 and the BP Macondo oil well in the Gulf of Mexico in April 2010, caused colossal disasters. The existing top kill technique by pumping in kill- weight mud failed. The relief well technique worked, however it was very costly and very late due to drilling the relief well. This invention is a rapid and reliable kill and restoration technique and its implementation system for the well blowout accidents. It uses solid particles to block, suppress and greatly reduce the blowout flow to gain time for repair or replacement of the damaged blowout preventer and other devices, and connection of production pipelines; It then takes out some of the solid particles to restore well production. In such a way, environmental damage is greatly reduced and the well is kept as a valuable production asset. While any shape of solid particles may be used, the ball shape is an optimum for the kill and restoration operation; hence kill balls are the recommended solid particles. The kill procedure is to sequentially release large, medium and small density balls into the blowout well. Balls of different densities can be made of different materials such as lead, iron, stone or rubber and can have a shell cover made of iron, steel or other environmental friendly material. An implementation system for the kill procedure consists of a tubing system, a blower or a pump, a ball injection device and a cage. The transporting fluid can be air, nitrogen, carbon dioxide, oil or other fluid depending on the operation safety assessment in regarding to the specific well blowout situation. The cage mounted on the tubing and sits on top of the well will temporally contain the blown out balls at the early stage of the kill process. Balls in the cage will fall down to the well as the flow is reduced. A technique for taking out some of the balls from the well to restore production is carried out by a tubing system, a pump and a balls storage tank.
Abstract:
A method and apparatus for installing casing hangers in a wellbore utilizing an externally activated gripping system to temporarily bind wearbushings secured to casing and tubing hangers in order to lock-down such hangers during various wellbore drilling activities, thereby minimizing the size of landing shoulders and eliminating additional lock down equipment and simplifying running procedures.
Abstract:
A system for cementing a casing (103) in an open wellbore having no surface casing, wherein an annulus (105) is defined between the casing and the wellbore, the system having: an annular plug (120) around the casing at the mouth of the wellbore; a cement composition pump fluidly connected to the annulus through the seal; and a coupling (102) connected to the exposed end of the casing for taking circulation fluid returns from the inner diameter of the casing.
Abstract:
Device for blocking off a well in open flow which includes a blocking system (4) for blocking off the well, an anchorage system (3) to support said blocking system (4) and a movable and inclinable support and positioning system (5) which comprises a sliding ramp (6) and means for moving the blocking system (4) to bring it above the end of the casing (2) to be blocked off. Application : exploration, production and storing of hydrocarbons.
Abstract:
A stuffing box and seal cartridge for sealing the end of a rotatable rod is disclosed. The stuffing box includes a sleeve adapted to concentrically receive a portion of the rod therethrough and a tubular pipe concentrically arranged within the sleeve, the rod passing generally concentrically through the pipe, the pipe being in annular spaced relation to the sleeve and the rod. One or more ring seals are arranged between the pipe and the sleeve to prevent the flow of well fluids into the annulus between the sleeve and the pipe. An annular fluid chamber is defined between the sleeve and the pipe below the ring seals. One or more uni-directional seals are arranged below the fluid chamber and configured to permit fluid flow into the fluid chamber. During normal operation, the fluid chamber is pressurized to apply a pressure to the one or more ring seals, and the fluid chamber pressure is varied in response to well fluid pressure.
Abstract:
A method is described for supply of liquid from a liquid storage to a casing string (10,12, 14..) which from a deck (16) on an installation is conveyed down in a well with the help of a pipe handler comprising an elevator, where the liquid is supplied via an uppermost casing (10) which is added to the casing string, and the liquid is supplied through a filling pipe (30) via an outlet nozzle (36) to the top of the casing (10) already during the pipe's (10) screwing into the casing string (10, 12, 14..) where the filling pipe is extended during the liquid supply until the casing string is being lowered down to a position where it is securely locked to the deck (16), and liquid is added to a suitable level in the casing string. The method is characterised in that the filling pipe (30) is extended in that it comprises a telescopic axially moveable pipe end part (35) with a constricted outlet (36) which leads to the pipe end part (35) being pushed axially outwards and extends the filling pipe (30) when the liquid is supplied under pressure, and the pipe end part (35) is pushed outwards under the counter effect of a prestressing force, and pulled back under the influence of said prestressing force when the liquid supply stops. Also described is a device as given in claim 10.
Abstract:
A stripper adapter mounted on a coiled tubing injector head unit includes a swivel ring secured between an upper thrust washer and a lower thrust washer, wherein the swivel ring is rotatable 360 degrees about a longitudinal axis.
Abstract:
There is described an apparatus (14) for isolating a well bore (12). The apparatus (14) includes a sealing element (20) which is axially and transversely moveable relative to a sealing element seat (21). An actuator (30) is provided to axially and/or transversely move the sealing element (20) into sealing engagement with the sealing element seat (21) so as to isolate the well bore (12).