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A small diameter stage cementer assembly 10 and a hydraulically operated packer collar stage cementer 110, including a cementer housing 12 for interconnection with a casing string 14 positionable in a slim-hole wellbore for a cementing operation. The cementer housing 12 including a seat 11 for recei

A small diameter stage cementer assembly 10 and a hydraulically operated packer collar stage cementer 110, including a cementer housing 12 for interconnection with a casing string 14 positionable in a slim-hole wellbore for a cementing operation. The cementer housing 12 including a seat 11 for receiving a lower, drillable portion 335 of an opening sleeve assembly 135 after the upper drillable portion 235 of the opening sleeve assembly 135 has been drilled out. The lower, drillable portion 335 wedges into engagement with the seat 11 to prevent rotation of the drillable portion 335 during drill-out, such that the lower portion 335 may be drilled up using a small diameter bit and drill string, and accommodating a reduced weight on bit. The packer collar embodiment includes a hydraulically actuatable packer 70. In the packer collar embodiment of the stage cementer 110, cementing ports 34 are provided separate in a separate axial plane from hydraulic inflation ports, such that the secondary opening device or rupture disks may be securely positioned within the cementing ports. Thereby, a relatively thin-walled outer case 20 may be utilized for the hydraulic passageway 130 to the packer 70, without having to increase the case outer diameter to accommodate positioning a rupture disk in the case. The stage cementer housing may be sized for use with a casing string 14 with a nominal OD of 41/2 inches or less. An improved method of operating a stage cementer is disclosed.

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A small diameter stage cementer assembly 10 and a hydraulically operated packer collar stage cementer 110, including a cementer housing 12 for interconnection with a casing string 14 positionable in a slim-hole wellbore for a cementing operation. The cementer housing 12 including a seat 11 for recei

A small diameter stage cementer assembly 10 and a hydraulically operated packer collar stage cementer 110, including a cementer housing 12 for interconnection with a casing string 14 positionable in a slim-hole wellbore for a cementing operation. The cementer housing 12 including a seat 11 for receiving a lower, drillable portion 335 of an opening sleeve assembly 135 after the upper drillable portion 235 of the opening sleeve assembly 135 has been drilled out. The lower, drillable portion 335 wedges into engagement with the seat 11 to prevent rotation of the drillable portion 335 during drill-out, such that the lower portion 335 may be drilled up using a small diameter bit and drill string, and accommodating a reduced weight on bit. The packer collar embodiment includes a hydraulically actuatable packer 70. In the packer collar embodiment of the stage cementer 110, cementing ports 34 are provided separate in a separate axial plane from hydraulic inflation ports, such that the secondary opening device or rupture disks may be securely positioned within the cementing ports. Thereby, a relatively thin-walled outer case 20 may be utilized for the hydraulic passageway 130 to the packer 70, without having to increase the case outer diameter to accommodate positioning a rupture disk in the case. The stage cementer housing may be sized for use with a casing string 14 with a nominal OD of 41/2 inches or less. An improved method of operating a stage cementer is disclosed. P2 and the central blocks, and the middle blocks are substantially aligned every two or more (number n) pitches P1; two or more circumferential positions at which the central blocks and the middle blocks are substantially aligned are provided around the tire; circumferential positions of the axially outer blocks are between the middle blocks. mber comprises a packer. 11. The system as recited in claim 8, further comprising a packer disposed intermediate the inner wellbore casing and the outer wellbore casing. 12. The system as recited in claim 11, wherein the packer is positioned beneath the perforation. 13. A system for venting a gas during production of a desired fluid from a subterranean location, comprising: a bottom intake electric submersible pumping system having an electric motor, a pump and a pump intake, the electric motor being deployed downstream from the pump; a wellbore casing disposed about the bottom intake electric submersible pumping system to receive a direct flow of liquid from the bottom intake electric submersible pumping system; a flow blocking member disposed between the electric submersible pumping system and the wellbore casing; and a gas vent formed through the wellbore casing at a location below the flow blocking member to vent gas from the wellbore casing. 14. The system as recited in claim 13, wherein the bottom intake electric submersible pumping system comprises a gas separator. 15. The system as recited in claim 13, further comprising a gas separation system disposed within the wellbore casing at a location below the flow blocking member. 16. The system as recited in claim 13, further comprising a deployment member to suspend the electric submersible pumping system within the wellbore casing. 17. The system as recited in claim 16, further comprising an outer wellbore casing radially spaced from the wellbore casing to provide a gas flow passage. 18. The system as recited in claim 17, wherein the deployment member comprises a cable. 19. The system as recited in claim 17, wherein the deployment member comprises a coiled tubing. 20. The system as recited in claim 17, wherein the blocking member comprises a seating shoe. 21. The system as recited in claim 17, wherein the blocking member comprises a packer. 22. The system as recited in claim 17, further comprising a packer disposed intermediate the inner wellbore casing and the outer wellbore casing. 23. A system for venting a gas during production of a desired fluid from a wellbore, comprising: an outer wellbore casing; an inner wellbore casing positioned to form a flowpath between the inner and the outer wellbore casing, the inner wellbore casing having a vent; a deployment system disposed within the inner wellbore casing; and a bottom intake pumping system having a pump powered by a submersible motor disposed above the pump, the bottom intake pumping system being suspended within the inner wellbore casing to produce a desired liquid, wherein a gas is separated from the desired liquid and vented to the flowpath via the vent. 24. The system as recited in claim 23, wherein the bottom intake pumping system comprises a bottom intake electric submersible pumping system. 25. The system as recited in claim 24, wherein the bottom intake electric submersible pumping system comprises a gas separator. 26. The system as recited in claim 25, wherein the bottom intake electric submersible pumping system comprises a discharge head having an outlet through which a fluid is discharged. 27. The system as recited in claim 26, further comprising a flow blocking member deployed intermediate the discharge head and the inner wellbore casing. 28. The system as recited in claim 27, wherein the flow blocking member comprises a seating shoe. 29. The system as recited in claim 27, wherein the blocking member comprises a packer. 30. The system as recited in claim 28, wherein the bottom intake electric submersible pumping system is suspended by a coiled tubing. 31. A method for producing a fluid from a wellbore, comprising: deploying a bottom intake electric submersible pumping system having a submersible motor and a submersible pump powered by the submersible motor, the submersible motor being downstream of the submersible pump within a wellbore casing; separating a gas from a fluid within the w