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US 2020/0347691 A1Published application
Wireline sealing assembly
AssigneeNational Oilwell Varco UK Limited
InventorsJohn Ronald Hartley Craig, George Alexander Senkbeil
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AssigneeNational Oilwell Varco UK Limited
InventorsJohn Ronald Hartley Craig, George Alexander Senkbeil
Estimating the term…
A wireline sealing assembly adapted to seal a line such as wireline or slickline deployed in an oil or gas well has a body to receive a line and a seal adapted to be actuated into sealing engagement with the line to contain wellbore pressure within the well below the actuated seal. The seal comprises first and second seal members, each seal member comprising at least one sealing element, wherein the first and second seal members are formed of different materials. The second seal member may have a greater hardness rating or lower degree of resilience that the first seal member. The first and second seal members may radially deform against the line when the seal is actuated, and the first seal member may radially deform more than the second seal member. The seal may also comprise a third seal member comprising at least one sealing element, wherein the third seal member is formed of a different material to the first and second seal members.
A wireline sealing assembly comprising a body configured to receive a line for deployment in a well, and a seal adapted to be actuated into sealing engagement with the line in the body to contain wellbore pressure within the well below the actuated seal, wherein the seal comprises first and second seal members, the first seal member comprising at least one first sealing element, and the second seal member comprising at least one second sealing element, and wherein the first and second seal members are formed of different materials.
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A method of deploying a wireline in a well, the method comprising passing the wireline through a wireline sealing assembly comprising a body configured to receive a line for deployment in a well, and a seal adapted to be actuated into sealing engagement with the line in the body to contain wellbore pressure within the well below the actuated seal, and actuating the seal to contain wellbore pressures within the well while permitting movement of the wireline relative to the seal, wherein the seal comprises first and second seal members, the first seal member comprising at least one elastomeric sealing element, and the second seal member comprising at least one backup sealing element, and wherein the first and second seal members are formed of different materials.
A wireline sealing assembly comprising a body configured to receive a line for deployment in a well, and a seal comprising first and second seal members each of the first and second seal members having an aperture to receive the line, and being adapted to be actuated into sealing engagement with the line in the body to contain wellbore pressure within the well below the actuated seal, the first seal member comprising at least one first sealing element, and the second seal member comprising at least one second sealing element, wherein the second seal member comprises a plurality of at least two second sealing elements arranged on opposite sides of the first sealing member, the first and second sealing elements being arranged in an axial stack which has axial symmetry along an axis of a path of the line, wherein the first and second seal members are formed of different materials, wherein an inner surface of the aperture of the first sealing element has a larger diameter than an inner surface of the aperture of the second sealing element.
Dependencies are inferred from the claim text.