Abstract: A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis, and a backpressure valve cartridge arranged in the flowbore. The backpressure valve cartridge includes a valve seat and a flapper valve pivotally mounted relative to the valve seat. The backpressure valve cartridge is shiftable along the longitudinal axis to shift the flapper valve between a first position, wherein the flapper valve rests on the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat.

Abstract: A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis. A backpressure valve is arranged in the flowbore. The backpressure valve includes a flapper valve including a first side and an opposing second side pivotally mounted to the inner surface to selectively extend across the flowbore and a locking system including a spring clip mounted to the inner surface. The flapper valve is pivotable between a first position, wherein the flapper valve is free to pivot relative to the inner surface, and a second position, wherein the flapper valve is pivoted away from the flowbore and locked open by the spring clip such that the first side forms part of the flowbore.

Abstract: A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis and a backpressure valve arranged in the flowbore. The backpressure valve includes a flapper valve including a hinge end, a cantilevered end, a first side and an opposing second side pivotally mounted to the inner surface at the hinge end to selectively extend across the flowbore, and a locking system mounted to the inner surface adjacent to the hinge end of the flapper valve in the flowbore. The flapper valve is pivotable between a first position, wherein the flapper valve is free to pivot relative to the inner surface between an open configuration and a closed configuration, and a second position, wherein the hinge end of the flapper valve activates the locking system to lock the flapper valve in the open configuration.

Abstract: A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis, and a backpressure valve cartridge arranged in the flowbore. The backpressure valve cartridge includes a passage, a valve seat arranged in the passage, and a flapper valve pivotally mounted relative to the valve seat in the passage. The valve seat is shiftable within the backpressure valve cartridge along the longitudinal axis to shift the flapper valve between a first position, wherein the flapper valve is free to pivot relative to the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat and maintained in an open configuration.

Abstract: A surgical instrument comprises a first arm including a first closed loop engageable with a first spinal implant disposed with a first vertebral surface. A second arm is movable relative to the first arm and includes a second closed loop engageable with a second spinal implant disposed with a second vertebral surface. Surgical systems, constructs, implants and methods are disclosed.

Abstract: A surgical retractor includes a part defining a longitudinal axis. A first radiolucent blade is connected with the part. A second radiolucent blade is connected with the part. The blades are independently translatable relative to the part. At least one of the blades includes spaced apart arms that are connected via a member. The member and the arms are relatively disposed in a configuration to guide at least one surgical instrument in a selected orientation relative to a surgical site. Surgical systems, instruments, constructs, implants and methods are disclosed.

Abstract: A surgical retractor includes a part defining a longitudinal axis. A first radiolucent blade is connected with the part. A second radiolucent blade is connected with the part. The blades are independently translatable relative to the part. At least one of the blades includes spaced apart arms that are connected via a member. The member and the arms are relatively disposed in a configuration to guide at least one surgical instrument in a selected orientation relative to a surgical site. Surgical systems, instruments, constructs, implants and methods are disclosed.

Abstract: A spinal construct comprises a body defining a first groove. A transverse rod is formed with the body. A first band is disposable in the first groove. A base is connectable with the body and engageable with the first band. The base defines a second groove and a slot. A second band is disposable in the second groove and defines an opening aligned with the slot. A shaft is connectable with the base and engageable with the second band. The shaft is configured to penetrate tissue. The opening is aligned with the slot to facilitate an angular range of movement of the shaft relative to the body. Implants, systems, instruments and methods are disclosed.

Abstract: A circulation sub and method of operating a circulation sub. The circulation sub includes a support member having a longitudinal axis and a piston movable along the longitudinal axis of the support member. A release member secures the piston to the support member. A force is applied along a length axis of the release member greater than a selected decoupling force threshold to decouple the support member from the piston, thereby allowing the piston to move along the longitudinal axis of the member.

Abstract: A spinal construct comprises a body defining a first groove. A transverse rod is formed with the body. A first band is disposable in the first groove. A base is connectable with the body and engageable with the first band. The base defines a second groove and a slot. A second band is disposable in the second groove and defines an opening aligned with the slot. A shaft is connectable with the base and engageable with the second band. The shaft is configured to penetrate tissue. The opening is aligned with the slot to facilitate an angular range of movement of the shaft relative to the body. Implants, systems, instruments and methods are disclosed.

Abstract: A surgical retractor includes a part defining a longitudinal axis. A first radiolucent blade is connected with the part. A second radiolucent blade is connected with the part. The blades are independently translatable relative to the part. At least one of the blades includes spaced apart arms that are connected via a member. The member and the arms are relatively disposed in a configuration to guide at least one surgical instrument in a selected orientation relative to a surgical site. Surgical systems, instruments, constructs, implants and methods are disclosed.

Abstract: A surgical instrument comprises a first arm including a first closed loop engageable with a first spinal implant disposed with a first vertebral surface. A second arm is movable relative to the first arm and includes a second closed loop engageable with a second spinal implant disposed with a second vertebral surface. Surgical systems, constructs, implants and methods are disclosed.

Abstract: A spinal implant includes a body having an inner surface and a connecting wall. The inner surface defines at least one cavity and the connecting wall is disposed about the at least one cavity. The connecting wall defines at least one opening. An agent is disposable with the at least one cavity. Spinal constructs, surgical instruments, systems and methods are disclosed.

Abstract: A spinal construct includes a body having a wall disposed between a first cavity and a second cavity. The second cavity being configured for disposal of an existing spinal implant. A rod is disposed with the first cavity and connectable with tissue. The rod is rotatable relative to the body. Systems, surgical instruments, implants and methods are disclosed.

Abstract: A spinal construct includes a body having a wall disposed between a first cavity and a second cavity. The second cavity being configured for disposal of an existing spinal implant. A rod is disposed with the first cavity and connectable with tissue. The rod is rotatable relative to the body. Systems, surgical instruments, implants and methods are disclosed.

Abstract: In one embodiment, a method of formulating a sealant to span an opening and form a seal with surfaces across the opening is provided. The method further includes selecting a fluid material capable of contacting and adhering to the surface of the opening and which reacts to form a solid material as a result of a thermal reaction. The method further includes selecting and intermixing one or more solids with the fluid material to form a composite, wherein the solids migrate within a column of the composite sealant before the composite sealant cures from a fluid to a solid and bonds to the surfaces of the opening, and the change in volume of the lower portion of the composite sealant into which the solids have migrated, as the temperature thereof changes during curing, is insufficient to cause it to pull away from the surfaces of the opening or fail internally.

Abstract: A method of sealing a well includes selecting a preexisting fluid pathway between a production platform and a desired sealing location in the well to be sealed, determining, for the well to be sealed, a desired quantity of sealant having known flow qualities, to be delivered in fluid form to the well in the sealing region of the well, determining, based on the flow qualities of the sealant in fluid form and the flow qualities of the preexisting fluid pathway, the time needed to deliver the desired quantity of the sealant in fluid form to the sealing location in the well, determining, based on the time needed to deliver the desired quantity of the sealant in fluid form to the sealing location in the well, whether the sealant will maintain the fluid form, if necessary, change one or more qualities of the sealant so that the desired quantity of the sealant will reach the sealing location in the well while in the fluid form, and transport the quantity of sealant, in fluid form, through the preexisting fluid pathw

Abstract: In one embodiment of this disclosure, method of formulating a sealant to span an opening and form a seal with surfaces across the opening is provided. The method further includes selecting a fluid material capable of contacting and adhering to the surface of the opening and which reacts to form a solid material as a result of a thermal reaction. The method further includes selecting and intermixing one or more solids with the fluid material to form a composite, wherein the composite cures from a fluid to a solid and bond to the surfaces of the opening and the change in volume of the composite as the temperature thereof changes during curing is insufficient to cause it to pull away from the surfaces of the opening or fail internally.

Abstract: A method of providing a resin based sealant to a flow line leading to a well includes determining a quantity of resin to perform a sealing operation in the well, determining a ratio of resin to a hardener to provide a hardened sealing material with desired properties establishing a flow of the resin having a resin flow rate, and, continuously mixing the resin and hardener and delivering the combined flow of resin and hardener after mixing to an injection line leading to the well while continuing to combine a further flow of the resin at the resin flow rate and a further flow of hardener at the hardener flow rate to form an additional combined flow.