Claims
- 1. A completion system for production of hydrocarbons from a formation surrounding a wellbore, the completion system comprising:
a completion assembly for disposal into an annulus of a wellbore, the completion assembly defining a flowbore therewithin for flowing of cement and hydrocarbons; a valve assembly incorporated within the completion assembly having a flow port that may be moved between a substantially opened position and a substantially closed position to selectively provide fluid communication between the flowbore and the annulus; a mandrel incorporated within the completion assembly and containing a cylinder for selective placement of a gas lift valve; and a gas lift valve shaped and sized to reside within the cylinder of the mandrel.
- 2. The completion system of claim 1 further comprising:
a landing collar incorporated within the completion assembly for seating of a wiper plug; and a wiper plug to be disposed within the flowbore of the completion assembly for cleaning of excess cement from components making up the completion assembly.
- 3. The completion system of claim 1 further comprising a packer incorporated within the completion assembly to assist in anchoring of the completion assembly within the wellbore.
- 4. The completion system of claim 1 wherein the valve assembly comprises:
a generally tubular mandrel; a flow port within the mandrel; a frangible rupture disc within the flow port for initially closing the flow port against fluid flow; and an outer sleeve surrounding the mandrel and being moveable between a first position, wherein the flow port is substantially open to fluid communication, and a second position, wherein the flow port is substantially closed to fluid communication.
- 5. The completion system of claim 2 wherein the wiper plug comprises:
a shaft having a nose portion; a wiper disc affixed to the shaft and having radially extending portion to contact the flowbore and wipe excess cement therefrom.
- 6. The completion system of claim 5 further wherein the wiper plug further comprises a centralizer secured to the shaft.
- 7. The completion system of claim 5 wherein there is a plurality of wiper discs.
- 8. The completion system of claim 7 wherein at least one of said plurality of wiper discs is located as a leading wiper disc set proximate the nose portion and at least one of said plurality of discs is located as a trailing wiper disc set proximate a rear portion of the shaft.
- 9. The completion system of claim 2 wherein the landing collar presents a landing profile that is formed to receive a nose portion of the wiper plug.
- 10. A completion system for production of hydrocarbons from a formation surrounding a wellbore, the completion system comprising:
a completion assembly for disposal into an annulus of a wellbore, the completion assembly defining a flowbore therewithin for flowing of cement downwardly therethrough and hydrocarbons upwardly therethrough; a device for cleaning excess cement from the completion assembly; and a gas lift valve that can be operably associated with the completion system after flowing of cement through the flowbore.
- 11. The completion system of claim 10 wherein the device for cleaning excess cement from the completion assembly comprises a wiper plug to be driven through the flowbore.
- 12. The completion system of claim 10 wherein the device for cleaning excess cement from the completion assembly comprises a valve assembly incorporated within the completion assembly having a flow port that may be moved between a substantially opened position and a substantially closed position to selectively provide fluid communication between the flowbore and the annulus.
- 13. The completion system of claim 10 further comprising a packer assembly to aid in securing the completion assembly within a wellbore.
- 14. The completion system of claim 10 further comprising a shoe track proximate a lower end of the flowbore.
- 15. The completion system of claim 11 further comprising a landing collar incorporated into the completion system for landing of the wiper plug within the completion system.
- 16. A method of completing a subterranean well for gas lifted fluid extraction comprising the steps of:
a. positioning within a well bore a production tubing string having at least one mandrel assembled within said tubing string; b. displacing cement through a flow bore of said tubing string into a wellbore annulus around a portion of said tubing string below said mandrel; c. perforating said tubing portion and surrounding cement to admit formation fluid flow into said flow bore; d. charging said wellbore above said cement with pressurized gas; and, e. admitting said pressurized gas into said flow bore through said mandrel to extract fluids from said formation.
- 17. A method of completing a well as described by claim 16 wherein said cement is displaced through said at least one side pocket mandrel.
- 18. A method of completing a well as described by claim 16 wherein said cement is displaced by pressurized well working fluid driven behind a cement wiper plug.
- 19. A method of completing a well as described by claim 18 wherein said well working fluid behind said wiper plug substantially removes cement remaining within said mandrel.
- 20. A method for production of hydrocarbons from a formation proximate a wellbore comprising the steps of:
disposing a completion assembly into a wellbore, said completion assembly having a flowbore defined therewithin; pumping cement through the flowbore of the completion assembly to fill a portion of an annulus surrounding the completion assembly; closing a lower end of the flowbore against fluid flow; cleaning excess cement from the completion assembly; opening a portion of the completion assembly so that hydrocarbon fluids from the formation may enter the flowbore; and assisting production of said hydrocarbon fluids from said flowbore using an artificial lift pump.
- 21. The production method of claim 20 wherein the step of closing a lower end of the flowbore further comprises landing a wiper plug within the flowbore.
- 22. The production method of claim 20 wherein the step of cleaning excess cement from the completion assembly comprises disposing a wiper plug through the flowbore to wipe excess cement from components of the production assembly.
- 23. The production method of claim 20 wherein the step of cleaning excess cement from the completion assembly comprises selectively circulating working fluid through the flowbore and into the annulus.
- 24. The production method of claim 23 wherein the step of selectively circulating working fluid through the flowbore and into the annulus further comprises rupturing a rupture disc to substantially open a flow port in a valve assembly.
- 25. The production method of claim 24 wherein the step of selectively circulating working fluid through the flowbore and into the annulus further comprises sliding a sleeve member to block fluid flow through the flow port.
Parent Case Info
[0001] This application claims the priority of U.S. Provisional patent application serial No. 60/415,393 filed Oct. 2, 2002.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60415393 |
Oct 2002 |
US |