A process and system for applying a liner to an inner surface of a pipeline uses an inversion technique to apply the liner. This involves arranging the liner into everted and non-everted portions and driving the non-everted portion through the pipeline such that it everts and is applied to the inner surface of the pipeline. At least first and second pipeline vehicles are used to drive the non-everted portion of the liner through the pipeline.

Various approaches to performing non-divergent parallel traversal operations for a bounding volume hierarchy (BVH) during ray tracing are presented. For example, a computer system has a processing unit with threads that, collectively, perform ray tracing for a group of rays in parallel in a computer-represented environment, which includes geometric objects (such as triangles) enclosed in the BVH. Each of the threads receives parameters for a given ray and traverses the BVH to determine an intersection, if any, between the given ray and one of the geometric objects. The order of traversal of the BVH is synchronized between threads for the rays of the group, for example, using a cross-group operation such as a ballot operation. In this way, the overall speed of the BVH traversal can be improved in many cases, while avoiding code divergence and data divergence in extra-wide single-instruction, multiple data (SIMD) graphics processing unit (GPU) architectures.

Tubing everting apparatus, assemblies, and methods are disclosed herein. The tubing everting apparatus include a pressure chamber that defines an internal volume, a liner inlet port that is configured to receive a flexible tube liner into the internal volume, an inlet sealing structure that is configured to resist fluid flow therepast from the pressure chamber, and a liner outlet port that is configured to permit the flexible tube liner to extend from the internal volume. In some embodiments, the apparatus include a lubricator that is configured to apply a lubricant to the flexible tube liner. In some embodiments, the apparatus include a non-deflation valve that is configured to selectively transition between open and closed states. The assemblies include the apparatus and a cart that includes a lubricant reservoir. The methods include methods of operating the apparatus.

Tubing everting apparatus, assemblies, and methods are disclosed herein. The tubing everting apparatus include a pressure chamber that defines an internal volume, a liner inlet port that is configured to receive a flexible tube liner into the internal volume, an inlet sealing structure that is configured to resist fluid flow therepast from the pressure chamber, and a liner outlet port that is configured to permit the flexible tube liner to extend from the internal volume. In some embodiments, the apparatus include a lubricator that is configured to apply a lubricant to the flexible tube liner. In some embodiments, the apparatus include a non-deflation valve that is configured to selectively transition between open and closed states. The assemblies include the apparatus and a cart that includes a lubricant reservoir. The methods include methods of operating the apparatus.

Embodiments of the present disclosure include flexible impregnated articles, composites produced by curing such flexible impregnated article, and processes for forming flexible impregnated articles. The flexible impregnated articles, composites, and processes can be used as alternatives to articles, composites, and processes in a cured-in-place pipe rehabilitation process that include epoxy resins, thus eliminating toxicity issues associated with the use of epoxy resins. The instantly-disclosed flexible impregnated articles, composites, and processes can be particularly useful for the CIPP process in potable water pipe and pressure pipe applications.

Embodiments of the present disclosure include flexible impregnated articles, composites produced by curing such flexible impregnated article, and processes for forming flexible impregnated articles. The flexible impregnated articles, composites, and processes can be used as alternatives to articles, composites, and processes in a cured-in-place pipe rehabilitation process that include epoxy resins, thus eliminating toxicity issues associated with the use of epoxy resins. The instantly-disclosed flexible impregnated articles, composites, and processes can be particularly useful for the CIPP process in potable water pipe and pressure pipe applications.

A pipe-liner system for lining a pipe and methods of use thereof. A continuous, eversible extended liner is formed from a pipe-liner attached to an extender-tube via a substantially leak-proof connection there between. Lengths of the extender-tube and the pipe-liner are each chosen so that the pipe-liner is caused to be accurately positioned within the pipe upon everting the extended liner into the pipe by a pressurized fluid. The pipe-liner is held against an interior surface of the pipe being lined by inserting an inflatable bladder into the extended liner and filling the bladder with pressurized fluid. When a resin in the pipe-liner has hardened, the bladder is removed and the extender-tube is detached from the pipe-liner.

A pipe-liner system for lining a pipe and methods of use thereof. A continuous, eversible extended liner is formed from a pipe-liner attached to an extender-tube via a substantially leak-proof connection there between. Lengths of the extender-tube and the pipe-liner are each chosen so that the pipe-liner is caused to be accurately positioned within the pipe upon everting the extended liner into the pipe by a pressurized fluid. The pipe-liner is held against an interior surface of the pipe being lined by inserting an inflatable bladder into the extended liner and filling the bladder with pressurized fluid. When a resin in the pipe-liner has hardened, the bladder is removed and the extender-tube is detached from the pipe-liner.

A method of manufacturing a length of lined pipe inserts a radially contracted liner pipe into an outer host pipe. Injector needles are inserted through an end of the outer pipe into an annular gap between the pipes. Adhesive is injected between the pipes at locations inboard of the end of the outer pipe. After withdrawing the injectors, at least a portion of the liner pipe is expanded to close the gap and to bond the pipes together via the injected adhesive. Shims can be inserted into the gap between the pipes. A portion of the liner pipe inboard of the shims can be expanded radially while the shims constrain local radial expansion of an outboard portion of the liner pipe to maintain the gap for accommodating the injectors. Withdrawing the shims after injecting the adhesive allows radial expansion of the outboard portion to close the gap between the pipes.

Methods, apparatus or equipment and systems for lining conduits, e.g., preferably subterranean pipelines and passageways, such as sewers, with a liner impregnated with a curable resin in order to secure the conduit against ingress or egress of liquids.