Claims
- 1. A wellbore liner assembly comprising a wellbore liner having a minor section of increased external and internal diameter joined to and communicating with a larger major section of smaller external and internal diameter, the major section provided with sealable ports proximate the junction of the major and minor sections.
- 2. The apparatus of claim 1 wherein sealing means are provided for sealing the sealable ports.
- 3. Apparatus comprising a casing having a uniform internal diameter, and its smallest internal diameter, at its bottom and terminating in a joining section of decreased internal diameter compared to the internal diameter of the remainder of the casing;a liner assembly comprising a wellbore liner having a minor section of increased external and internal diameter joined to and communicating with a larger major section of smaller external and internal diameter, the major section provided with sealable ports proximate the junction of the major and minor sections, said minor section having an external diameter approximating the internal diameter of the remainder of the casing and disposed in the bore of the casing above the joining section, with the casing being of uniform diameter above the minor section, and said major section being disposed such that its sealable ports are proximate and beneath the joining section.
- 4. Apparatus comprising:(a) a casing terminating in a joining section of decreased internal diameter compared to the internal diameter of the remainder of the casing: (b) a liner assembly comprising a wellbore liner having a minor section of increased external and internal diameter joined to and communicating with a larger major section of smaller external and internal diameter, the major section provided with ports proximate the junction of the major and minor sections said minor section having an external diameter approximating the internal diameter of the casing and disposed in the bore of the casing, and said major section disposed such that its ports are proximate and beneath the joining section; and (c) means for sealing provided to seal the ports.
- 5. The apparatus of claim 4 having a fluid circulating tool disposed in the liner assembly, said fluid circulating tool comprising a tool member having at least one first passage positioned for transmission of fluid into the major section, and at least one second passage positioned to communicate with said ports to provide a second fluid flow path, for a wellbore fluid, without substantial or significant impediment, from the ports to the interior of the casing.
- 6. The apparatus of claim 5 in which means are provided inside the liner for sealing the ports and the tool member is provided with means for actuating the means for sealing the ports.
- 7. The apparatus of claim 4 comprising at least one sleeve composed of a compressible material mounted on the periphery of the minor section.
- 8. The apparatus of claim 7 in which the compressible material is rubber.
- 9. The apparatus of claim 5 wherein means for releasably joining the liner and the fluid circulating tool are provided.
- 10. The apparatus of claim 4 wherein the means for sealing comprises a sliding sleeve.
- 11. The apparatus of claim 6 wherein the actuating means comprises pins mounted on the tool member.
- 12. The apparatus of claim 9 wherein the major section of liner comprises an internal cylindrical recess for accommodation of the sliding sleeve.
- 13. The liner assembly of claim 1 wherein a completely tapered section extends from and connects the minor section to the major section.
- 14. The liner of claim 4 wherein the major and minor sections are joined through a tapered section.
- 15. The liner of claim 4 wherein the major and minor sections are joined through a reducing joint.
- 16. The apparatus of claim 9 wherein the liner and fluid circulating tool comprise threaded sections adapted for releasably joining the liner and the fluid circulating tool.
Parent Case Info
This is a division of application Ser. No. 08/960,513 filed on Oct. 29, 1997, now U.S. Pat. No. 6,098,710.
US Referenced Citations (12)