Abstract: A web winding apparatus includes a frame support having a horizontal track arrangement; a first mandrel rotatably mounted at a first fixed position on the frame support above the track arrangement, for removably holding a core thereon; a second mandrel rotatably mounted at a second fixed position on the frame support above the track arrangement, for removably holding a core thereon; a motor drive for rotating the first and second mandrels; a carriage movable between first and second carriage positions along the track arrangement below the first and second fixed positions, respectively, for guiding a web onto the core on the first mandrel at the first carriage position and cutting the web thereat, and for guiding a web onto the core on the second mandrel at the second carriage position and cutting the web thereat, the carriage including a first support, first guide rollers mounted to the first support for riding along the linear track arrangement, second guide rollers mounted to the first support, a second sup

Abstract: A lap splicing apparatus for lap splicing first and second webs together, with each of the first and second webs alternately constituting a running web and a new web to be spliced to the running web, includes a frame; a first spindle mounted at a first fixed position on the frame for holding a roll containing the first web at a first orientation; a second spindle mounted at a second fixed position on the frame for holding a roll containing the second web at the first orientation; a single lap splicing device immovably mounted at a fixed position on the frame for lap splicing the first and second webs together with the trailing tail end of the lap splice always being on the same side; a first transfer assembly of rollers for bringing the first web to the lap splicing device, and for turning the first web by at least one angle from the first orientation; and second transfer assembly of rollers for bringing the second web to the lap splicing device, and for turning the second web by at least one angle from the f

Abstract: A heat seal splice assembly for heat splicing first and second webs together, with each web alternately constituting a running web moving in first direction and a new web to be spliced to the running web upon depletion of the running web from a roll, includes a central guide having first and second sides, with the first web being located to the first side of the central guide and the second web being located to the second side of the central guide, the central guide having a hold down assembly for holding the new web to the central guide, a rotation assembly for rotating the central guide such that the new web held to one side of the central guide can be positioned to an opposite side of the central guide at which the running web is positioned, a clamping assembly for clamping the first and second webs together, a first heat seal assembly movable toward and away from the first side of the central guide to heat seal the first and second webs together against the first side of the central guide when the first a

Abstract: A subsea packer system for large diameter casings where an inflatable liner is connected in a string of casing and has an inner tubular drillable insert member with a longitudinal bypass passage. A string of tubing with a releasable running tool is connected to a casing well head on the casing for transport into a well bore and has an isolation seal member for closing off inflation ports which extend through the insert member to the inflatable packer. The bore of the insert member is sized to a bore diameter less than the bore diameter of the casing well head and is less than the diameter of the casing.

Abstract: A stage valve with particular use in cementing a well bore annulus where the stage valve has pressure operated valve member for opening a flow passage in the stage valve and the valve member has differential pressure areas which maintain the valve member open while a fluid moves through the flow passage in one direction and which can be closed by fluid moving in an opposite direction. The flow passage has a choke to develop a pressure differential from the flow of fluid. Spring members can be used with the valve member to close the flow passage when the pressure differential of the fluid flow in one direction is insufficient to maintain the valve member in an open position.

Abstract: A subsea packer system for large diameter casings where an inflatable liner is connected in a string of casing and has an inner tubular drillable insert member with a longitudinal bypass passage. A string of tubing with a releasable running tool is connected to a casing well head on the casing for transport into a well bore and has an isolation seal member for closing off inflation ports which extend through the insert member to the inflatable packer. The bore of the insert member is sized to a bore diameter less than the bore diameter of the casing well head and is less than the diameter of the casing.

Abstract: A system for inflating an inflatable packer located in a well bore on a liner where the inflatable packer has an inflation valve and a latching recess. An inflation tool with inner and outer assemblies is disposable by a string of tubing to a position within the inflatable packer where cup members on the outer assembly straddle the inflation valve and friction drag block members on the outer assembly are located in an annular recess above the inflation valve.

Abstract: A stage valve with particular use in cementing a well bore annulus above an inflatable packer located in a well bore on a liner where the stage valve has pressure operated outer sleeve members for opening a flow port in the stage valve and an inner sleeve member actuated by the trailing plug behind a liquid cement slurry to close the flow port whereupon spring members act on at least one of the outer sleeve members to close off the flow port on the exterior of the stage valve.

Abstract: A process for determining suitable parameters of temperature and/or pressure to use in a cementing operation in a wellbore to obtain a positive seal of cement in an annulus between a liner and a borehole wall after the cement has set up and where the process utilizes the parameters of differential temperature in a well bore, pressure on the cement to obtain a positive borehole wall stress (and positive seal) in a cementing operation.

Abstract: A method for determining a proper inflation pressure for an elongated inflatable packer to effect a positive contact stress seal of an elastomer packer element with a borehole wall in a wellbore traversing earth formations. The temperature differential for each layer in a radial plane is determined. The final contact stress, the finite inflation pressure required to inflate the packer element and the temperature differential are functionally interrelated to one another to obtain a final contact stress or the packer element with a borehole wall.

Abstract: A well tool having an anchor device, straddle packers above and below a port and an internal valve which are operated by longitudinal motion in an inflatable packer device. The well tool anchor is armed by a hydraulic operated plug and set upon downward motion in a locating profile groove in a well bore. The tool when attached to a string of tubing can be filled with cement slurry and downward motion used to anchor the well tool in a profile groove in an inflatable packer; to set the straddle packers above and below an access port on an inflatable packer; and then to open a valve to admit cement slurry to the inflatable packer. After filling the inflatable packer with cement slurry, an upward motion is used to close the valve, unset the straddle packers and release the anchor to move to another location where the operation can be repeated. At the conclusion of operations, a circulation valve is opened by pressure to reverse out cement slurry from the tubing string.