摘要:
A downhole pumping system in production tubing having a seal between the intake and discharge of a through tubing downhole pump that automatically deploys when the pump initiates operation. The seal automatically disengages when the pump suspends operating and redeploys when the pump starts operating again. The pumping system can be set at a different depth before restarting the pump. The seal can include a bladder like member that has an opening facing towards the pump discharge, so that discharged fluid expands the bladder radially outward into sealing contact with the tubing.
摘要:
A gravel pack assembly includes screen sections with a packer between them. A first screen section communicates an uphole annulus with the assembly's interior passage, and a second screen section communicates a downhole annulus with the interior passage. A housing of the packer has an internal bore communicating with the assembly's interior passage and has an internal bypass communicating external ports with one another. A first packer element disposed between the external ports restricts gravel passage at least from the uphole to the downhole annulus. A second packer element disposed downhole from a second of the external ports is independently actuated to isolate fluid passage between the uphole and downhole annulus. One or more transport tubes communicate slurry from the uphole annulus to the internal bypass once the uphole annulus is packed with gravel.
摘要:
A well system includes an annular barrier separating the tubing-casing annulus into an upper annulus and a lower annulus and a barrier valve coupled with the annular barrier, the barrier valve permitting one-way fluid communication from the upper annulus to the lower annulus. The annular barrier may include dual cup packers.
摘要:
A downhole seal element (10) comprises a cup portion (11) formed of or including a resiliently deformable material. The cup portion (11) extends between on the one hand a nose part (12) comprising an annulus intended for sealingly mounting the seal element on a mandrel (22) and on the other hand a skirt (13), the seal element flaring in shape between the nose part (12) and the skirt (13). The skirt includes extending therefrom away from the nose part (12) a plurality of elongate, flexible limbs (18) that are spaced at intervals about the skirt (13).
摘要:
A gravel pack system and method for zonal isolation includes a swellable element used in conjunction with a primary isolation device, such as a cup packer. The zones may be isolated by both the isolation device and the swellable element. Shunt tubes may be used to convey a gravel slurry to each zone. At least one upper shunt tube extends through the isolation device to provide the slurry to the zone therebelow. Once the gravel packing is completed, the swellable member may be activated to provide and supplement a hydraulic seal between adjacent zones.
摘要:
In one embodiment, a tubular handling apparatus is provided with a wedge lock release mechanism that creates a clearance to allow movement by the mandrel having mating wedge surfaces relative to the tubular to release the wedge slips. In another embodiment, a tubular handling apparatus for handling a tubular includes a mandrel; a carrier coupled to the mandrel; a gripping element for engaging the tubular; an engagement member coupled to the carrier for engaging an upper portion of the tubular; and an abutment device adapted to engage the engagement member, wherein a length of the abutment device is adjustable to allow movement of the engagement member.
摘要:
The present invention generally relates to a packer for creating a seal in an annular area. In one aspect, a packer cup for use in a wellbore is provided. The packer cup includes a base and a first seal segment having a first end and a second end. The first end of the first seal segment is attached to the base. The packer cup further includes a second seal segment that is spaced apart from the base. The second seal segment is attached to the second end of the first seal segment, wherein each seal segment is configured to move from a retracted shape to an expanded shape upon activation of the respective seal segment. In another aspect, a method for creating a seal between a tubular and a wellbore is provided. In a further aspect, a packer is provided.
摘要:
A cementing adaptor includes a cylindrical carrier carrying a casing seal, a middle interval and a lower end separated by an annular rib, and a cylindrical swivel element disposed around and coaxially rotatable relative to the middle interval. A cylindrical connector has an upper end rotatably disposed around the carrier's lower end and non-rotatably connected to the swivel element, plus a lower end connectable to an inner tubular string. With the carrier's upper end connected to a casing running tool (CRT), this assembly can be disposed within a casing string with the casing seal engaging the casing and preventing fluid flow into the casing annulus below the seal when cement is pumped down the inner string, such that the cement is urged into the wellbore annulus. The swivel connection limits torque transfer that might otherwise overload the CRT or its connection to the cementing adaptor.
摘要:
A system for plugging an oil well comprises a hollow drill string. A connecting device having an upper surface, a side surface, and a lower surface having a recess is loosely situated around the drill string. A first skirt has a plurality of first rods that are each pivotally connected to the upper surface. A second skirt has a plurality of second rods that are each pivotally connected to the lower surface. A first fastening ring is configured to selectively allow the first skirt to transition from a closed position to an open position. A second fastening ring is configured to selectively allow the second skirt to transition from a closed position to an open position. A stop having a beveled edge is secured to the drill string. The recess is configured to allow the connecting device to mate with the stop's beveled edge.
摘要:
A pressure control device for isolating a section of a conduit is described. The device comprises a support member, a flexible cup member mounted to the support member, a first swellable element, the first swellable element adapted, upon activation by an activation fluid, to urge a first portion of the cup member outwards into engagement with a conduit surface and at least one bypass arranged to permit the activation fluid to bypass the swellable element and build up behind a second portion of the cup member.