Bypass gaslift system, apparatus, and method for producing a multiple zones well

An apparatus for producing petroleum fluid from a multiple zones well, the apparatus separately produces petroleum fluid from two vertically-spaced production zones and comprises:

• a casing running downwardly from the ground surface into the vertically-spaced upper and lower production zones;
• a tubing string arranged in the casing whereby an annular space is formed between the said casing and tubing string;
• a sealing mechanism comprising an upper sealing mechanism and a lower sealing mechanism arranged on the tubing string and casing to seal the annular space above the upper and lower production zones respectively;
• and
• a tubular member arranged in the upper and lower sealing mechanisms parallel to the tubing string and extends downwardly from above the upper sealing mechanism then ends near the lower production zone, wherein the tubular member comprises at least one connecting means provided as passageway for connecting the tubular member to the tubing string at a depth below the lower sealing mechanism, at least one gas injection mechanism assembled to the tubing string below the at least one connecting means for injecting lifting gas to the lower production zone, at least one gas injection mechanism assembled to the tubing string above the upper sealing mechanism for injecting lifting gas into the tubing string, and at least one opening/closing mechanism or a port intalled to the tubing string above the lower production zone to allow unloaded petroleum fluid to enter the tubing string.

An apparatus for producing petroleum fluid from a multiple zones well, the apparatus simultaneously produces petroleum fluid from two vertically-spaced production zones and comprises:

• a casing running downwardly from the ground surface into the vertically-spaced upper and lower production zones;
• a tubing string arranged in the casing whereby an annular space is formed between the said casing and tubing string;
• a sealing mechanism comprising an upper sealing mechanism and a lower sealing mechanism arranged on the tubing string and casing to seal the annular space above the upper and lower production zones respectively;
• and
• a tubular member arranged in the upper and lower sealing mechanisms parallel to the tubing string and extends downwardly from above the upper sealing mechanism then ends near the lower production zone, wherein the tubular member comprises upper and lower connecting means provided as passageways for connecting the tubular member to the tubing string at the depths between the upper and lower sealing mechanisms and below the lower sealing mechanism respectively, at least one gas injection mechanism assembled to the tubing string below the upper connecting means and below the lower connecting means for injecting lifting gas to the upper and lower production zones respectively, and opening/closing mechanisms or ports intalled to the tubing string above the upper production zone and lower production zone to allow the unloaded petroleum fluid to enter the tubing string.

A bypass gaslift mechanism of an apparatus for producing petroleum fluid from a multiple zones well, which is comprised of a casing running downwardly from the ground surface into the vertically-spaced multiple production zones, a tubing string arranged in the casing whereby an annular space is formed between the said casing and tubing string and at least one sealing mechanism arranged on the tubing string and casing to seal the annular space above the production zones, the bypass gaslift mechanism comprising:

• a tubular member arranged in the sealing mechanism parallel to the tubing string and extends downwardly from above the sealing mechanism and ends near the production zones;
• at least one connecting means provided as passageway for connecting the tubular member to the tubing string at a depth below the sealing mechanism;
• at least one gas injection mechanism assembled to the tubing string below the at least one connecting means for injecting lifting gas to the production zones;
• and
• at least one opening/closing mechanism or a port installed to the tubing string above the production zones to allow unloaded petroleum fluid to enter the tubing string.