Apparatus and method for deploying equipment into a wellbore

Abstract

A method for lubricating a downhole tool into a wellbore with a lubricator assembly comprising a hydraulic cylinder with a cylinder and a rod and a pressure isolation assembly connected to the bottom of the cylinder of the hydraulic cylinder. The pressure isolation assembly has a base, a top, a plurality of posts supporting the top in a spaced apart relationship to the base, and a seal assembly supported by the base and configured to seal around the rod. The seal assembly includes a packing flange body having a flange portion and a tubular portion formed as a one piece unit. The flange portion extends across a portion of a lower side of the base and the tubular portion extends through base. The rod extends through the seal assembly of the pressure isolation assembly.

What is claimed is: 
     
         1 . A method for lubricating a downhole tool into a wellbore, the method comprising:
 installing a blowout preventer to the top of a wellhead, the blowout preventer includes internal rams;   suspending a lubricator assembly over the wellhead, the lubricator assembly including a hydraulic cylinder with a cylinder and a rod and a pressure isolation assembly connected to the bottom of the cylinder of the hydraulic cylinder, wherein the pressure isolation assembly has a base, a top, a plurality of posts supporting the top in a spaced apart relationship to the base, and a seal assembly supported by the base and configured to seal around the rod, the seal assembly includes a packing flange body having a flange portion and a tubular portion formed as a one piece unit, the flange portion extending across a portion of a lower side of the base and the tubular portion extending at least partially through base, the rod extending through the seal assembly of the pressure isolation assembly;   assembling the downhole tool;   connecting the assembled downhole tool to the rod;   securing at least one spacer spool to the flange portion of the seal assembly of the pressure isolation assembly to encase the assembled downhole tool;   connecting the spacer spool to the top of the blowout preventer;   equalizing the pressure in the at least one spacer spool and the pressure in the wellbore;   holding the pressure in the spacer spool with the seal assembly;   activating the hydraulic cylinder to extend the rod and downhole tool through the blowout preventer; and   suspending the downhole tool in the blowout preventer with the internal rams of the blowout preventer.   
     
     
         2 . The method of  claim 1 , further comprising:
 supporting the lubricator assembly on a trailer prior to suspending the lubricator assembly over the wellhead; and   pressure testing the assembled downhole tool with a make-up and testing assembly supported by the trailer.   
     
     
         3 . The method of  claim 2 , further comprising assembling the downhole tool with the make-up and testing assembly prior to pressure testing the assembled downhole tool, wherein the make-up and testing assembly includes a tong boom supported by the trailer and supporting a tong trolley assembly configured to connect and disconnect portions of the tool assembly. 
     
     
         4 . A method for lubricating a downhole tool into a wellbore, the method comprising:
 assembling a downhole tool with a make-up and testing assembly supported by a trailer, the make-up and testing assembly including a tong boom supported by the trailer and supporting a tong trolley assembly configured to connect and disconnect portions of the tool assembly.   installing a blowout preventer to the top of a wellhead, wherein the blowout preventer includes internal rams;   supporting a lubricator assembly on the trailer in a horizontal orientation, the lubricator assembly including a hydraulic cylinder with a cylinder and a rod and a pressure isolation assembly connected to the bottom of the cylinder of the hydraulic cylinder, the pressure isolation assembly has a base, a top, a plurality of posts supporting the top in a spaced apart relationship to the base, and a seal assembly supported by the base and configured to seal around the rod;   moving the lubricator assembly from the horizontal orientation to a vertical orientation with a crane supported by the trailer;   suspending the lubricator assembly over the wellhead;   connecting the assembled downhole tool to the rod;   securing at least one spacer spool to the flange portion of the seal assembly of the pressure isolation assembly to encase the assembled downhole tool;   connecting the spacer spool to the top of the blowout preventer;   equalizing the pressure in the at least one spacer spool and the pressure in the wellbore;   holding the pressure in the spacer spool with the seal assembly;   activating the hydraulic cylinder to extend the rod and downhole tool through the blowout preventer; and   suspending the downhole tool in the blowout preventer with the internal rams of the blowout preventer.   
     
     
         5 . The method of  claim 4 , further comprising:
 supporting the lubricator assembly on a trailer prior to suspending the lubricator assembly over the wellhead; and   pressure testing the assembled downhole tool with the make-up and testing assembly supported by the trailer prior to connecting the assembled downhole tool to the rod.   
     
     
         6 . A method for lubricating a downhole tool into a wellbore, the method comprising:
 assembling a downhole tool with a make-up and testing assembly supported by a trailer, the make-up and testing assembly including a tong boom supported by the trailer and supporting a tong trolley assembly configured to connect and disconnect portions of the tool assembly.   installing a blowout preventer to the top of a wellhead, wherein the blowout preventer includes internal rams;   supporting a lubricator assembly on the trailer in a horizontal orientation, the lubricator assembly including a hydraulic cylinder with a cylinder and a rod and a pressure isolation assembly connected to the bottom of the cylinder of the hydraulic cylinder, wherein the pressure isolation assembly has a base, a top, a plurality of posts supporting the top in a spaced apart relationship to the base, and a seal assembly supported by the base and configured to seal around the rod, the seal assembly includes a packing flange body having a flange portion and a tubular portion formed as a one piece unit, the flange portion connected to and extending across a portion of a lower side of the base and the tubular portion extending at least partially through base, the rod extending through the seal assembly of the pressure isolation assembly;   moving the lubricator assembly from the horizontal orientation to a vertical orientation with a crane supported by the trailer;   suspending the lubricator assembly over the wellhead;   connecting the assembled downhole tool to the rod;   securing at least one spacer spool to the flange portion of the seal assembly of the pressure isolation assembly to encase the assembled downhole tool;   connecting the spacer spool to the top of the blowout preventer;   equalizing the pressure in the at least one spacer spool and the pressure in the wellbore;   holding the pressure in the spacer spool with the seal assembly;   activating the hydraulic cylinder to extend the rod and downhole tool through the blowout preventer; and   suspending the downhole tool in the blowout preventer with the internal rams of the blowout preventer.   
     
     
         7 . The method of  claim 6 , further comprising:
 supporting the lubricator assembly on a trailer prior to suspending the lubricator assembly over the wellhead; and   pressure testing the assembled downhole tool with the make-up and testing assembly supported by the trailer prior to connecting the assembled downhole tool to the rod.