초록 ▼

Embodiments of methods for pipeline rehabilitation include deploying a tubular liner along an inside of a pipeline, deflating the tubular liner to form a trough, and injecting grout into the pipeline by injecting grout into the trough. Other embodiments include deploying a tubular liner along an ins

Embodiments of methods for pipeline rehabilitation include deploying a tubular liner along an inside of a pipeline, deflating the tubular liner to form a trough, and injecting grout into the pipeline by injecting grout into the trough. Other embodiments include deploying a tubular liner along an inside of a pipeline, inserting a first swab into the front end of the pipeline, the first swab having a core hole, placing the tubular liner through the core hole, injecting grout into the pipeline between the tubular liner and the inside of the pipeline, and advancing a second swab through the tubular liner to distribute the grout between the tubular liner and the pipeline and to advance the first swab ahead of the second swab from the front end to the back end of the pipeline.

대표청구항 ▼

What is claimed is: 1. A method for pipeline rehabilitation, comprising: deploying a tubular liner along an inside of a pipeline, the tubular liner and the pipeline each having a front end and a back end; inserting a first swab into the front end of the pipeline, the first swab having a core hole f

What is claimed is: 1. A method for pipeline rehabilitation, comprising: deploying a tubular liner along an inside of a pipeline, the tubular liner and the pipeline each having a front end and a back end; inserting a first swab into the front end of the pipeline, the first swab having a core hole formed therethrough; placing the tubular liner through the core hole; injecting grout into the pipeline between the tubular liner and the inside of the pipeline; advancing a second swab through the tubular liner from the front end to the back end of the tubular liner to distribute the grout between the tubular liner and the pipeline and to advance the first swab ahead of the second swab from the front end to the back end of the pipeline. 2. The method of claim 1, wherein the first swab is configured to maintain a back pressure between the tubular liner, the grout, and the pipeline. 3. The method of claim 1, wherein the core hole is a first core hole, the method further comprising: inserting a third swab into the front end of the pipeline, the third swab having a second core hole formed therethrough; and positioning the tubular liner inside of the second core hole. 4. The method of claim 1, further comprising: deflating the tubular liner until the tubular liner assumes a substantially trough-shaped cross-section, wherein injecting grout into the pipeline between the tubular liner and the inside of the pipeline comprises injecting grout onto the substantially trough-shaped cross-section. 5. The method of claim 4, wherein injecting grout into the pipeline between the tubular liner and the inside of the pipeline further comprises injecting grout under the substantially trough-shaped cross-section. 6. The method of claim 4, wherein injecting grout onto the substantially trough-shaped cross-section comprises injecting grout onto the substantially trough-shaped cross-section at the front end of the pipeline, the method further comprising: injecting grout onto the substantially trough-shaped cross-section through an intermediate grout port of the pipeline, the intermediate grout port formed in the pipeline between the front end and the back end of the pipeline. 7. The method of claim 1, wherein advancing the second swab through the tubular liner from the front end to the back end of the tubular liner comprises applying a compressed fluid in the tubular liner behind the second swab. 8. The method of claim 7, wherein the compressed fluid is compressed air. 9. The method of claim 7, wherein the compressed fluid is water. 10. The method of claim 1, wherein inserting the first swab into the front end of the pipeline comprises inserting the first swab into the front end of the pipeline such that the first swab engages the inside of the pipeline above and below the core hole. 11. The method of claim 10, wherein inserting the first swab into the front end of the pipeline such that the first swab engages the inside of the pipeline above and below the core hole comprises inserting the first swab into the front end of the pipeline such that the first swab engages the inside of the pipeline along an inner circumference of the inside of the pipeline. 12. A system for pipeline rehabilitation, the system comprising: a tubular liner deployed along an inside of a pipeline; a swab inside the pipeline, the swab having a core hole formed therethrough, the tubular liner positioned through the core hole; a liner clamp coupled to the tubular liner; and a grout injection manifold coupled to the pipeline at a first end and coupled to the liner clamp at a second end. 13. The system of claim 12, wherein the grout injection manifold comprises a grout injection port located along the grout injection manifold closer to the first end than to the second end. 14. The system of claim 12, wherein the swab is a first swab, the system further comprising: a second swab configured for insertion into the tubular liner through the liner clamp. 15. The system of claim 12, further comprising: an end plate operable to cover and hermetically seal with the liner clamp; and a fluid aperture formed in the end plate. 16. The system of claim 15, further comprising: a vacuum source coupled to the fluid aperture and configured to deflate the tubular liner during grout insertion. 17. A system for rehabilitation of a pipeline, the system comprising: a tubular liner deployed along an inside of the pipeline; a first swab inside the pipeline, the first swab having a core hole formed therethrough, the tubular liner positioned through the core hole, the first swab engaging the inside of the pipeline above and below the core hole; a second swab inside the tubular liner, the second swab applying radial force against the tubular liner; and grout positioned between the tubular liner and the inside of the pipeline. 18. The system of claim 17, wherein the first swab applies radial force against the inside of the pipeline. 19. The system of claim 17, wherein the grout is also positioned between the tubular liner and the first swab. 20. The system of claim 17, wherein the core hole is formed through a center of the first swab.