Patent Publication Number: US-8528632-B2

Title: Packer deployment with electric submersible pump with optional retention of the packer after pump removal

Description:
FIELD OF THE INVENTION 
     The field of the invention is placement and setting of a packer using an electric submersible pump (ESP) and more particularly the ability to remove the ESP while leaving the packer behind to secure the wellbore below. 
     BACKGROUND OF THE INVENTION 
     ESPs have previously required a separate run to locate and set the packer. After the packer was set the ESP assembly would be run in and stabbed into the packer so the ESP could then be operated. More recently in U.S. Pat. No. 7,055,595 the ESP was run in together with an inflatable with a line from the pump discharge going to the inflatable so that when the desired location was reached the pump was turned on and the inflatable was inflated. When the pump was shut off the inflatable deflated and was taken out with the ESP. 
     Other art that relates generally to the field of inflatables or packers or ESPs comprises U.S. Pat. Nos. 5,320,182; 4,589,632 and 5,404,946. Also of interest is US Publication 2009/0255691. 
     What is needed and not provided in the past is a way to run in an ESP with a packer and not only set the packer using the ESP or some other way but also a way to disconnect from the set packer when it is time to remove the ESP for repair or other reasons. The removal from the packer mandrel will allow a valve to close to secure the formerly produced zone. The ESP can be run in with coiled or rigid tubing or on wireline, for example. The packer type can be set mechanically or with pressure from the ESP or another pressure source from the surface. Removal of the ESP can allow a valve in the packer mandrel to close to block off the zone from which the ESP had been pumping before its removal. Those skilled in the art will more readily appreciate the details of the invention from the description of the preferred embodiment and the associated drawings while recognizing that the full scope of the invention is to be determined from the appended claims. 
     SUMMARY OF THE INVENTION 
     An ESP is run in to a desired subterranean location with a packer attached. Once at the desired location the packer is set either using the ESP or some other source of force or pressure. After the ESP has completed the task and needs to be removed, the packer stays set and the ESP releases from it. Removal of the ESP assembly allows a valve in the packer mandrel to close to isolate the zone from which the ESP had been pumping. The ESP can be run in on coiled tubing or rigid tubing or wireline. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows the ESP assembly in position with the packer set; and 
         FIG. 2  shows the ESP assembly being removed leaving the packer and the reservoir control valve behind at the subterranean location. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1  the assembly that is illustrated is placed in position at a subterranean location by rigid tubing or coiled tubing or wireline or an equivalent support  10  which also allows the motor leads  12  to be supported. The motor leads  12  terminate at a motor  14  that runs the ESP  16  through a seal section  18 . The ESP has discharge ports  20  and arrows  22  represent the flow in the annulus  23  back to the surface that is pumped by the ESP  16 . A stinger  24  is a tubular assembly connected to the suction end  26  of ESP  16  and that releasably extends into the reservoir control valve  28 . There is a sealable bore receptacle  30  at the upper end of the reservoir control valve  28 . The stinger  24  has seals  32  at its lower end that land in the sealable bore receptacle  30  and it releasably latched with a latch assembly that is of a design known in the art. The latch releases the stinger  24  on application of a predetermined pulling force. The reservoir control valve  28  supports a packer  34  that when set allows access to zone  36  so that the ESP  16  can pull fluid through the stinger  24  as illustrated by arrows  38 . A jumper line  40  is connected from the discharge end  42  of the ESP  16  to the packer setting mechanism schematically illustrated on the top of the packer  34  as  44 . Part of assembly  44  can be a breakaway coupling with a check valve or valves so that when the assembly illustrated down to the stinger  24  is to be removed from the reservoir control valve  28  so that valve  28  can close to isolate zone  36 , the jumper line  40  will come apart from the packer  34  at assembly  44  and the line  40  will come out with the ESP  16 . 
     Alternative setting arrangements for the packer  34  are contemplated where the jumper line  40  is not required. The packer  34  can be set with mechanical force, torque, hydrostatic pressure, applied pressure with an onboard pressure source or other equivalent ways. The packer design can be an inflatable or a compression set type that is powered by applied force or pressure to set the sealing element and slips in a known way. 
     Existing packers can be set with the illustrated system and a newly designed packer is not required. The primary advantage of the above described system is the ability to release from the packer  34  that had been run in with the ESP  16  and to do so in a manner that allows isolation of the zone  36  that had previously been produced. 
       FIG. 2  illustrates the seals  32  coming out of the sealable bore  30  of the reservoir control valve  28  and bringing out the jumper line  40  at the same time. Zone  36  is now isolated as the removal of the stinger  24  has allowed the reservoir control valve  28  to close. 
     As an option if the pressure from the ESP  16  is not sufficient a pressure intensifier  46  can be added to the jumper line  40  to raise the pressure level high enough to set the packer  34 . 
     The above description is illustrative of the preferred embodiment and many modifications may be made by those skilled in the art without departing from the invention whose scope is to be determined from the literal and equivalent scope of the claims below.