Apparatus and Method for Lubricating and Injecting Downhole Equipment Into a Wellbore

Abstract

An apparatus and method for lubricating and injecting downhole equipment into a wellbore includes a blowout preventer, a spool for enclosing the downhole equipment, a pressure isolation window, and a hydraulic cylinder. The blowout preventer is positioned above a wellhead. The spool is positioned above the blowout preventer. The pressure isolation window is positioned above the spool. The hydraulic cylinder is positioned above the pressure isolation window. The hydraulic cylinder comprises a rod connected to the downhole equipment, and the hydraulic cylinder is used to lower the downhole equipment into the wellbore.

1 . A hydraulic lubricator assembly for use in inserting a downhole tool into a wellbore, the hydraulic lubricator assembly comprising:
 a spool for enclosing the downhole tool, the spool having an upper end and a lower end;   a pressure isolation connector attached to the upper end of the spool, the pressure isolation connector having a lower packing gland and an upper packing gland;   a blowout preventer connected to the lower end of the spool, the blowout preventer having internal rams; and   a hydraulic assembly positioned above the pressure isolation connector, the hydraulic assembly including a rod connected to the downhole tool, the hydraulic assembly configured to lower the downhole tool into the blowout preventer so that the internal rams may be used to suspend the downhole tool in the wellbore.   
   
   
       2 . The hydraulic lubricator assembly of  claim 1 , wherein the spool comprises a plurality of spool segments. 
   
   
       3 . The hydraulic lubricator assembly of  claim 1 , wherein the pressure isolation connector comprises a base, a top, and a support. 
   
   
       4 . The hydraulic lubricator assembly of  claim 1 , wherein the lower packing gland comprises a packing gland body, a packing gland nut that engages the packing gland body, V-packing, and a packing gland pusher. 
   
   
       5 . The hydraulic lubricator assembly of  claim 1 , wherein the upper packing gland comprises a packing gland body, a packing gland nut that engages the packing gland body, V-packing, and a packing gland pusher. 
   
   
       6 . The hydraulic lubricator assembly of  claim 1 , wherein the lower packing gland comprises a ring seal. 
   
   
       7 . The hydraulic lubricator assembly of  claim 1 , wherein the rod is connected to the downhole assembly via a connector sub. 
   
   
       8 . The hydraulic lubricator assembly of  claim 1 , wherein the rod comprises modular rod segments. 
   
   
       9 . A hydraulic lubricator assembly for inserting a downhole tool into a wellbore, the hydraulic lubricator assembly comprising:
 a spool for enclosing the downhole tool;   a pressure isolation connector positioned above the spool, the pressure isolation connector comprising a top, a base, a lower packing gland attached to the base, and an upper packing gland attached to the top, the lower packing gland and the upper packing gland each having a packing gland body, a packing gland nut that engages the packing gland body, V-packing, and a packing gland pusher;   a blowout preventer connected below the spool, wherein the blowout preventer includes internal rams; and   a hydraulic assembly positioned above the pressure isolation connector, the hydraulic assembly movable to lower the downhole tool assembly into the blowout preventer, where the internal rams are used to suspend the downhole tool in the wellbore.   
   
   
       10 . The hydraulic lubricator assembly of  claim 9 , wherein the spool comprises spool segments. 
   
   
       11 . The hydraulic lubricator assembly of  claim 9 , wherein the hydraulic assembly comprises a rod connected to the downhole assembly. 
   
   
       12 . The hydraulic lubricator assembly of  claim 11 , wherein the rod is connected to the downhole assembly via a connector sub. 
   
   
       13 . The hydraulic lubricator assembly of  claim 9 , wherein the lower packing gland comprises a ring seal. 
   
   
       14 . The hydraulic lubricator assembly of  claim 11 , wherein the rod comprises modular rod segments. 
   
   
       15 . A method for lubricating a downhole tool into a wellbore, the method comprising the steps of:
 installing a blowout preventer to the top of a wellhead, wherein the blowout preventer includes internal rams;   assembling the downhole tool;   placing the assembled downhole tool in at least one spacer spool;   connecting the spacer spool to the top of the blowout preventer;   installing a pressure isolation connector to the top of the spacer spool, wherein the pressure isolation connector is provided with a lower packing gland and an upper packing gland;   connecting a hydraulic assembly to the top of the pressure isolation connector such that a rod of the hydraulic assembly extends through the lower packing gland and the upper packing gland;   connecting the rod to the downhole tool in the spacer spool;   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 lower packing gland;   activating the hydraulic assembly to extend the downhole tool through the blowout preventer; and   suspending the downhole tool in the blowout preventer with the internal rams of the blowout preventer.   
   
   
       16 . The method of  claim 15 , further comprising the steps of:
 releasing the pressure in the at least one spacer spool;   removing the spacer spools, pressure isolation connector, and hydraulic assembly from the blowout preventer;   installing a coiled tubing injector on top of the blowout preventer;   connecting a coiled tubing to the downhole tool; and   lowering the downhole tool into the wellbore with the coiled tubing injector.