Configurable wellbore zone isolation system and related systems

1. A system for isolating a section of a wellbore having fluid under pressure, comprising:

(a) a wellhead positioned over the wellbore;

(b) a lubricator positioned on the wellhead, the lubricator controlling fluid pressure in the wellbore;

(c) a conveyance device conveyed into the wellbore via the lubricator and the wellhead;

(d) a first anchor adapted to sealingly engage a wellbore tubular;

(e) a second anchor spaced axially apart from the first anchor, the second anchor configured to sealingly engage a surface of the wellbore tubular; and

(f) a plurality of interlocking sealing elements connecting the first anchor to the second anchor, the plurality of interlocking sealing elements having no portion sealingly engaging the wellbore tubular; and wherein the first anchor, the second anchor and the plurality of interlocking sealing elements are each configured to be separately conveyed into the wellbore with the conveyance device.

2. The system of claim 1 wherein the first anchor, the second anchor and the plurality of interlocking sealing elements are configured to confine fluid within an annular space defined by the first anchor, the second anchor and the plurality of interlocking sealing elements and a wall of the wellbore.

3. The system of claim 1 wherein the first anchor and the second anchor include one of (i) a metal-to-metal seal, and (ii) an elastomeric seal.

4. The system of claim 1 wherein each of the plurality of sealing elements includes a polished bore receptacle.

5. The system of claim 1 wherein the first anchor, the second anchor and the plurality of interlocking sealing members are configured to have a connected length that is greater than the axial length of the lubricator.

6. The system of claim 1 further comprising a first and second swage, each of which is adapted to expand the first anchor and the second anchor, respectively.

7. The system of claim 1 further comprising:

(a) a third anchor axially spaced from the second anchor; and

(b) a second plurality of interlocking sealing elements connecting the second anchor to the third anchor, the second plurality of interlocking sealing elements having no portion sealingly engaging the wellbore tubular.

8. The system of claim 1 wherein the conveyance device includes a connecting member that is configured to decouple in response to a downward percussion.

9. The system of claim 1 wherein each of the plurality of interlocking elements is configured to be separately conveyed into the wellbore.

10. The system of claim 1 wherein at least two of the plurality of interlocking elements are configured to be joined together and conveyed into the wellbore.

11. A method for isolating a section of a wellbore having fluid under pressure, comprising:

conveying a first anchor into the wellbore;

activating the first anchor to sealingly engage the wellbore;

conveying a plurality of interlocking sealing elements into the wellbore, the plurality of interlocking sealing elements being tubular members that have no portion engaging the wellbore;

conveying a second anchor into the wellbore;

activating the second anchor to sealingly engage the wellbore; and

connecting the first anchor to the second anchoring using the plurality of sealing elements, wherein the first anchor, second anchor and sealing elements are separately conveyed into the wellbore.

12. The method of claim 11 wherein the activating steps include driving a first and second swage into the first anchor and the second anchor, respectively.

13. The method of claim 11 further comprising controlling wellbore fluid pressure using a lubricator.

14. The method of claim 13 wherein the plurality of interlocking sealing elements, the first anchor, and the second anchor are configured to have a connected length that is greater than the axial length of the lubricator.

15. The method of claim 11 further comprising confining fluid within an annular space defined by the first anchor, the second anchor and the plurality of interlocking sealing elements.

16. The method of claim 11 further comprising conveying one of:

(i) the first anchor, (ii) the second anchor, and (iii) at least one tubular member of the plurality of interlocking sealing elements, with a connecting member.

17. The method of claim 16 further comprising activating the connecting member by applying a downward percussion to the connecting member.

18. A method for isolating a section of a wellbore having fluid under pressure, comprising:

separately conveying a first anchor, a second anchor and a plurality of interlocking sealing elements into the wellbore with a conveyance device;

activating the first anchor to sealingly engage the wellbore;

forming a straddle seal connecting the first anchor to the second anchor, the straddle seal having a plurality of sealing elements having no portion engaging the wellbore; and

activating the second anchor to sealingly engage the wellbore.

19. The method of claim 18 wherein the plurality of sealing elements comprise interconnecting tubular members; and further comprising individually conveying each tubular member into the wellbore and coupling each tubular member together in a serial fashion.

20. The method of claim 18 wherein the activating steps include driving a first and second swage into the first anchor and the second anchor, respectively.

21. The method of claim 18 further comprising controlling wellbore fluid pressure using a lubricator.