You are an expert at summarizing long articles. Proceed to summarize the following text:

You are an expert at summarizing long articles. Proceed to summarize the following text: 
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application No. 12/766,111, filed on Apr. 23, 2010, the entirety of which is incorporated herein. 
    
    
     TECHNICAL FIELD 
     This invention relates to a setting tool for use in a wellbore, and a method of using a setting tool. 
     BACKGROUND OF THE INVENTION 
     Subterranean well tools are introduced or carried into a subterranean oil or gas well on a conduit, such as wire line, electric line, continuous coiled tubing, threaded work string, or the like, for engagement at a pre-selected position within the well along another conduit having an inner smooth wall, such as casing. These tools include devices such as expandable elastomeric, permanent or retrievable plugs, packers, ball-type and other valves, injectors, perforating guns, tubing and casing hangers, cement plug dropping heads, and other devices typically encountered during the drilling, completion, or remediation of a subterranean well, Such devices and tools will hereafter collectively be referred to as “auxiliary tools.” The auxiliary tool is typically set and anchored into position within the casing such that movements in various directions such as upwardly, downwardly, or rotationally, are resisted, and, in fact, prevented. Such movements may occur as a result of a number of causes, such as pressure differentials across the tool, temperature variances, tubing or other conduit manipulation subsequent to setting for activation of other tools in the well, and the like. 
     When positioned at the required depth, the auxiliary tool must be set. This typically requires shearing locating pins, setting a “slip” mechanism that engages and locks the auxiliary tool with the casing, and energizing the packing element in the case of setting a plug. This requires large forces, often in excess of 20,000 lbs. The activation or manipulation of some of such auxiliary tools often is achieved by use of some sort of apparatus, commonly referred to as a “setting tool,” which may be introduced into the well along with or subsequent to the auxiliary tool on wire or electric line, continuous or coiled tubing, or by other known means. Many types of setting tools exist. Some of these setting tools are known to apply hydrostatic well pressure within well fluids at the setting or activating depth through the setting apparatus and upon a face of a piston head or the like to move a stroking rod, cylinder or housing member in a direction to activate manipulation of the setting tool. Likewise, some of these setting tools are hydraulically operated, either by use of a pump in the setting tool that develops hydraulic pressure or surface pumps that transmit hydraulic pressure through tubing to the setting tool. 
     However, the most commonly used setting tools are those that are activated by means of an explosive called a pyrotechnic or “black power” charge to cause an explosion within a portion of the housing of the manipulation tool and the energy defined by this explosion drives such piston, stroking rod, or other member to cause the manipulation of the auxiliary tool. By “explosion” it is meant the continuous generation, sometimes relatively slowly, of energy by electric activation of a power charge-initiated reaction which results in a build up within a chamber of transmittable gaseous pressure within the apparatus. The industry standard explosive setting tool is the Model E-4 Wireline Pressure Setting Assembly, Product No. 437-02, of Baker International Corporation; however others, such as the Halliburton “Shorty” also exist. 
     After the auxiliary tool is set, the explosive setting tool remains pressurized and must be raised to the surface and depressurized. This typically entails bleeding pressure off the setting tool by rupturing a piercing disk with a piercing screw, thus creating a vent hole that allows the gas within the setting tool to bleed off. Not only is the depressurization of the setting tool dangerous, but it also exposes personal to potentially hazardous chemicals that result from the combustion of the pyrotechnic. Thus, this operation must be carried out under strictly controlled conditions. 
     While many procedures have been developed to minimize the risks associated with an explosive setting tool, many disadvantages inherent in the use of an explosive setting tool still remain. Explosives are dangerous to handle and difficult to store and maintain on the job site. This requires the use of trained explosives personnel at every stage of operation. Special permits and licenses are often required to comply with State and local safety regulations. Additionally, the use of explosives requires the controlled, gradual lowering of the setting tool. Certain of the prior setting tools have included an orifice in the body of the tool through which oil is forced as detonation occurs to thereby slow the setting action on the device being set. Also, explosives which are “slow burning” are employed in order to lessen the undesirable effects of a sudden explosion. Moreover, the use of explosives requires that the firing chamber of the tool be cleaned after every use, thereby adding to the maintenance requirements of the tool. 
     Obviously, as can be seen from the above, the use of explosives should be avoided if at all possible. While there are other alternatives available, a large number of explosive setting tools are in use. Therefore there exists a need for a means to convert an explosive setting tool, such as those described above, to non-explosive setting tools. 
     BRIEF SUMMARY OF THE INVENTION 
     In one aspect, the present invention provides a non-explosive setting tool for use in setting an auxiliary tool. In particular, the invention includes a conversion assembly that retrofits an explosive setting tool that includes explosive elements, a pressure chamber, an upper cylinder, a lower cylinder, and a cylinder connector, by removal of the pressure cylinder, the upper cylinder, and the cylinder connector and installing a conversion assembly that includes a motor controller, a gear motor, and a hydraulic pump. 
     In another aspect, the present invention provides a non-explosive setting tool for use in setting an auxiliary tool. In particular, the invention includes conversion elements that retrofit an explosive setting tool that includes explosive elements, a pressure chamber, an upper cylinder, a lower cylinder, and a cylinder connector that has been configured to receive conversion elements by removing of the floating piston and installing an insulated contact terminal and conversion elements. The conversion elements including a motor controller, a gear motor, a hydraulic pump including a pump inlet and pump outlet, and a face seal engaging mechanism. 
     In another aspect, the present invention includes a method of retrofitting an explosive setting tool that includes a pressure chamber, an upper cylinder, a lower cylinder, and a cylinder connector, for use in setting an auxiliary tool. The method includes the steps of removing the pressure chamber; removing the upper cylinder; removing the cylinder connector; and installing a conversion assembly. 
     In another aspect, the present invention includes a method of retrofitting an explosive setting tool, the tool including a pressure chamber, an upper cylinder, a lower cylinder, and a cylinder connector, for use in setting an auxiliary tool. The method includes the steps of: removing the floating piston from the explosive setting tool; installing conversion elements into the upper cylinder of the explosive setting tool; installing an insulated contact terminal in the pressure chamber of the explosive setting tool; and connecting the conversion elements with the insulated contact terminal. 
     In another aspect, the present invention includes a method of resetting a non-explosive setting tool including a pressure chamber, and upper cylinder, and a face seal engaging mechanism. The method including the steps of: disengaging the face seal engaging mechanism by unscrewing the pressure chamber from the upper cylinder thereby creating a fluid return path through the face seal engaging mechanism; placing the non-explosive setting tool in a resetting tool configured to support the non-explosive setting tool, the resetting tool being dimensioned to receive the cross link sleeve of the non-explosive setting tool; engaging the face seal engaging mechanism by screwing the pressure chamber into the upper cylinder thereby engaging the face seal engagement mechanism. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1A and 1B  schematically depict an explosive setting tool with explosive components in place; 
         FIG. 2  schematically depicts an explosive setting tool after the explosive components have been consumed; 
         FIGS. 3A ,  3 B, and  3 C schematically depict a retrofitted setting tool with the conversion elements necessary to retrofit the explosive setting tool to a non-explosive setting tool. 
         FIG. 4  schematically depicts a retrofitted setting tool after the piston has been stroked; 
         FIGS. 5A ,  5 B, and  5 C schematically depict a retrofitted setting tool and resetting tool; 
         FIGS. 6A ,  6 B,  6 C, and  6 D schematically depict a retrofitted setting tool with the conversion elements and attic cylinder in place; 
         FIGS. 7A and 7B  schematically depict a retrofitted setting tool with conversion elements and attic cylinder in place after the piston has been stroked; 
         FIGS. 8A ,  8 B, and  8 C schematically depict a retrofitted setting tool with the conversion assembly; and 
         FIG. 9  schematically depicts a retrofitted setting tool with conversion assembly after the piston has been stroke. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As used herein, “a” or “an” means one or more than one. Additional, distal refers to the end of the element closest to the setting mandrel of the setting tool and proximal end refers to the end of the element closest to the firing head of the setting tool. 
     The methods and apparatus of the present invention will now be illustrated with reference to  FIGS. 1A through 9 . It should be understood that these are merely illustrative and not exhaustive examples of the scope of the present invention and that variations which are understood by those having ordinary skill in the art are within the scope of the present invention. 
     Turning now to  FIGS. 1A and 1B , a prior art explosive setting tool  100  is shown. The explosive setting tool includes firing head  110 , pressure chamber  120 , upper cylinder  130 , lower cylinder  140 , cylinder head  150 , and crosslink  160 . Explosives or pyrotechnics are typically installed in pressure chamber  120 . Typical prior art explosive setting tools include three explosive elements, primary igniter  121 , secondary igniter  123 , and power charge  125 . The distal end of pressure chamber  120  is connected to upper cylinder  130  by a threaded connection and includes rubber O-rings to seal the connection between pressure chamber  120  and upper cylinder  130 . Additionally, the distal end of pressure chamber  120  includes an orifice that allows fluid communication between pressure chamber  120  and upper cylinder  130 . 
     Upper cylinder  130  includes floating piston  131 . The distal end of the upper cylinder is connected to the proximal end of cylinder connector  133 . The intersection of the upper cylinder  130 , floating piston  131  and cylinder connector  133 , forms a hydraulic fluid reservoir  137 , which contains hydraulic fluid used to transfer power from the gas generated by the combustion of primary initiator  121 , secondary igniter  123 , and power charge  125  to piston  141 . Cylinder connector  133  contains passageway  135  that allows hydraulic fluid to pass through cylinder connector and apply hydraulic pressure on piston  141 . 
     The proximal end of lower cylinder  140  is connected to the distal end of cylinder connector  133 . Piston  141  is attached to the proximal end of piston rod  143 . The distal end of the piston rod passes through an orifice in cylinder head  150 . Additionally, the distal end of lower cylinder  140  is attached to the proximal end of cylinder head  150  by a threaded connection. Additionally, cylinder head  150  includes internal and external O-rings that provide a seal between cylinder head  150  and lower cylinder  140  and between the cylinder head and piston rod  143 . Attached to the distal end of piston rod  143  is crosslink  160 . The crosslink includes crosslink sleeve  161  and setting mandrel  163 . 
       FIG. 2  shows a conventional explosive setting tool  200  after the explosive or pyrotechnic elements have been consumed. When the explosive setting tool is used, the primary igniter, secondary igniter, and the power charge are consumed and generate a large amount of gas as a result of a combustion reaction. Setting tool  200  now contains a fired primary igniter  221 , spent secondary  223 , and ash  225  resulting from the combustion of the pyrotechnics. The gas generated as a result of the combustion of the pyrotechnics forces floating piston  231  down to the cylinder connector  233 , which in turn forces hydraulic fluid through passageway  235  in the cylinder connector  233 . This results in approximately 3,000 to 6,000 psig of pressure forming in the space created by pressure chamber  220  and the portion of upper cylinder  230  above the floating piston  231 . 
     The hydraulic fluid entering lower cylinder  240  applies hydraulic pressure to piston  241 , which forces the piston to move from the proximal end of lower cylinder  240  to the distal end of lower cylinder  240 . This creates a hydraulic reservoir in lower cylinder  240  in be space between the distal end of cylinder connector  233  and piston  241 . Once the setting tool is fired, it must now be raised to the surface and reset. This will require reliving the residual pressure in pressure chamber  220  and upper cylinder  230 , cleaning upper cylinder  230  to remove spent secondary igniter  223  and ash  225  remaining from the combustion of the pyrotechnics, and returning the piston and hydraulic fluid to their original position. Once the tool has been cleaned, it must be inspected, and the primary igniter, secondary igniter, and power charge replaced. In addition to the various health and safety issues associated with the use of the pyrotechnics, the inspection and resetting of the tool requires significant time and expense. Because of the large number of existing explosive setting tools, a means of retrofitting explosive setting tools to eliminate these issues is desired. 
     To convert the explosive setting tool to a non-explosive setting tool, the primary igniter, secondary igniter, power charge, and floating piston are removed from the setting tool and are replaced with conversion elements shown in  FIGS. 3A-3C . The conversion elements include an insulated contact terminal  311 , male, female electrical connection  313 , motor controller and gear motor  377 , hydraulic pump  380 , and spring housing  386 . The insulated contact terminal  311  is connected to one part of the male, female connection  313  using multi-strand wire  315 ; the other part of the male, female connection  313  is connected to the motor controller and gear motor  377 . Motor controller and gear motor  377  connected to the hydraulic pump  380  via motor pump attachment piece  381  and motor shaft  321  is connected to pump  380  via a coupling. Pump  380  and a portion of the motor controller and gear motor  377  are housed within the sliding tube  378 , which is machined to fit within the upper cylinder of the setting device. Pump  380  includes an inlet  382  that allows low pressure hydraulic fluid to enter the pump and outlet  384  that allows high pressure hydraulic fluid to exit pump  380 . Pump outlet  384  is in contact with the discharge rod  385 . The conversion elements also include a spring housing that includes upper spring housing  387 , lower spring housing  388 , and springs  389 . The distal end of the spring housing includes an O-ring face seal  379 . 
     Pump  380  is preferably a positive displacement pump, such as, rotary lobe, progressive cavity, screw, gear, hydraulic, or the like can be utilized. Further springs  389  are preferably disk springs, however any compression spring can be utilized. 
     Retrofitted setting tool  300  shows the tool configured ready to run in the well and includes firing head  310 , pressure chamber  320 , upper cylinder  330 , lower cylinder  340 , cylinder head  350 , crosslink  360 , and the conversion elements. With the pyrotechnics removed from pressure chamber  320 , insulated contact terminal  311  is installed in pressure chamber  310  in place of the primary igniter. The distal end of pressure chamber  320  is connected to upper cylinder  330  by a threaded connection and includes rubber O-rings to seal the connection between pressure chamber  320  and upper cylinder  330 . Additionally, the distal end of pressure chamber  320  includes an orifice that allows fluid communication between pressure chamber  320  and upper cylinder  330 . 
     With the floating piston removed, the conversion elements including the controller and gear motor  377 , hydraulic pump  380 , sliding tube  378 , and a spring housing are installed in the upper cylinder  330 . As with the explosive setting tool, the distal end of upper cylinder  330  is connected to the proximal end of cylinder connector  333 . The remaining portion of the setting tool is unchanged from the description above. Sliding tube  378  is dimensioned to fit inside upper cylinder  330  and further dimensioned to be engaged by pressure cylinder  330 . As the threaded connection between pressure chamber  320  and upper cylinder  330  is tightened, the face seal  379  of the conversion elements is energized. As the threaded connection is tightened, disk springs  389 , which are housed between upper spring housing  387  and lower spring housing  388  are compressed, thus energizing the face seal, which is between the lower spring housing  388  and the proximal end of the cylinder connector  333 . Further, piston rod  343  is fully seated in lower spring housing  388 , sealing discharge rod  385  with lower spring housing  388 . With the face seal energized, the hydraulic fluid, which is stored in the void space of pressure chamber  320  and the upper cylinder  330 , is sealed from the passage through cylinder connector  333  and lower cylinder  340 . With face seal  379  of the conversion assemble energized, the pathway of the hydraulic fluid in the pressure chamber  320  and the upper cylinder  330  is through hydraulic pump  380  via pump outlet  384  and discharge rod  385 . 
       FIG. 4  shows retrofitted setting tool  400  after the tool has moved through the setting stroke motion. After a control signal is sent to the insulated contact terminal  411 , control logic in the controller and gear motor  477  is activated. The controller can be programmed to energize the motor and run the pump while contact terminal  411  is activated, for a set period of time, until all hydraulic fluid is pumped, for a specific stroke length, or until a specific pump outlet pressure is obtained. Further, the pump control logic can be programmed to vary the stroke speed, the stroke pressure, and other timing elements. Once the energized, hydraulic pump  480  transports hydraulic fluid through pump outlet  484  and discharge rod  485  through passage  435  way in the cylinder connector  433 . This exerts pressure on the face of piston  441  and forces piston  441  to travel down toward the distal end of lower cylinder  440 . The hydraulic fluid accumulates in a reservoir created in lower cylinder  440  between piston  441  and the lower face of cylinder connector  433 , 
     Once the setting tool has moved through its setting motion and the auxiliary tool has been set, the tool must be raised to the surface to be reset.  FIG. 5A-5C  shows retrofitted setting tool  500  and resetting tool  590 . Once raised to the surface, pressure chamber  520  is partially unscrewed from the upper cylinder  530  to disengage the face seal by releasing disk springs  589  in a spring housing. Once the face seal  579  is disengaged, the discharge rod  585  is unseated from the lower spring housing  588  creating a fluid path allowing hydraulic fluid to flow from the lower cylinder  540  through passage way  535  in cylinder connector  533 , through a passage way in lower spring housing  588  and through the fluid return path  572 , around hydraulic pump  580 , and controller and motor  577  into hydraulic reservoir  537 . 
     Retrofitted setting tool  500  is then set on resetting tool  590  which is designed to receive cross link sleeve  561 . The weight of setting tool  500  is used to force piston  541  back to its original position by the distal end of cylinder connector  533 . This forces the hydraulic fluid through the through the fluid path allowing hydraulic fluid to flow from the lower cylinder  540  through the passage way  535  in cylinder connector  533 , through a passage way in lower spring housing  588  and through fluid return path  572 , around hydraulic pump  580 , and controller and motor  577  into the hydraulic reservoir  537 . Once reset, pressure chamber  520  is screwed into the upper cylinder  530 . Once tightened, face seal  579  is energized and discharge rod  585  is reseated in lower spring housing  588  and the tool is reset for use. 
       FIG. 5C  shows a detailed view of resetting tool  590 . Resetting tool  590  includes upper cylinder  591  and lower support member  595 . The opening of upper cylinder  591  is designed to receive and support the cross link sleeve of the setting tool. Lower support member  595  is designed to provide sufficient clearance of the setting mandrel, which passes through accommodation hole  593  in the resetting tool when the tool is reset. 
     An alternative preferred embodiment of the present invention is illustrated in  FIGS. 6A-6A . In this embodiment, an additional cylinder is added to the retrofitted setting tool to allow for use of the tool in horizontal applications. In horizontal applications, it is likely that air pockets can develop in the hydraulic reservoir, which may result in pump becoming air locked. To prevent this situation, an additional cylinder is added to the setting tool. This cylinder provides a pressurized attic to minimize the potential of air pocket formation in the hydraulic reservoir that may lead air locking of the pump. Similarly to the embodiment described above, the firing head, primary igniter, secondary igniter, power charge, and floating piston are removed from the setting tool and are replaced with conversion elements shown in  FIGS. 6A-6D . The conversion elements include insulated contact terminal  611 , male, female electrical connection  613 , motor controller and gear motor  677 , hydraulic pump  680 , and a spring housing. Insulated contact terminal  611  is connected to one part of male, female connection  613  using multi-strand wire  615 . The other part of male, female connection  613  is connected to motor controller and gear motor  677 . Motor controller and gear motor  677  is connected to hydraulic pump  680  via motor pump attachment piece  681 . Motor shaft  621  is connected to the pump  680  via a coupling. Pump  680  and a portion of the motor controller and gear motor  677  are housed within the sliding tube  678 , which is machined to fit within the upper cylinder of the setting device. Pump  680  includes inlet  682  that allows low pressure hydraulic fluid to enter pump  680  and outlet  684  that allows high pressure hydraulic fluid to exit pump  680 . Pump outlet  684  is in contact with discharge rod  685 . The conversion elements also include a spring housing that includes upper spring housing  687 , lower spring housing  688 , and springs  689 . The distal end of the spring housing includes an O-ring face seal  679 . 
     Retrofitted setting tool  600  shows the tool configured ready to run in the well and includes firing head  610 , attic cylinder  601 , pressure chamber  620 , upper cylinder  630 , lower cylinder  640 , cylinder head  650 , crosslink  660 , and the conversion elements installed. With the pyrotechnics removed from pressure chamber  620 , insulated contact terminal  611  is installed in the pressure chamber  610  in place of the primary igniter. The distal end of pressure chamber  620  is connected to upper cylinder  630  by a threaded connection and includes rubber O-rings to seal the connection between pressure chamber  620  and upper cylinder  630 . Additionally, the distal end of pressure chamber  620  includes an orifice that allows fluid communication between pressure chamber  620  and the upper cylinder  630 . 
     With the floating piston removed, controller and gear motor  677 , hydraulic pump  680 , sliding tube  678 , and a spring housing are installed in upper cylinder  630 . As with the explosive setting tool, the distal end of upper cylinder  630  is connected to the proximal end of cylinder connector  633 . The remaining portion of the setting tool is unchanged from the description above. Sliding tube  678  is dimensioned to fit inside the upper cylinder  630  and further dimensioned to be engaged by the pressure cylinder  630 . As the threaded connection between the pressure chamber  620  and the upper cylinder  630  is tightened, the face seal  679  of the conversion elements is energized. As the threaded connection is tightened, the disk springs  689 , which are housed between upper spring housing  687  and lower spring housing  688  are compressed, thus energizing the face seal, which is between lower spring housing  688  and the proximal end of cylinder connector  633 . Further, piston rod  643  is fully seated in the lower spring housing, sealing discharge rod  685  with the lower spring housing  688 . With the face seal energized, the hydraulic fluid, which is stored in the void space of pressure chamber  620  and upper cylinder  630 , is sealed from the passage through the cylinder connector  633  and lower cylinder  640 . With face seal  679  of the conversion assemble energized, the pathway of the hydraulic fluid in pressure chamber  620  and upper cylinder  630  is through hydraulic pump via the pump outlet and discharge rod  685 . 
     The distal end of attic cylinder  601  is connected to proximal end of pressure cylinder  610  by a threaded connection. However, other connection means, such as weld connections, are also contemplated by the invention. Attic cylinder  601  includes floating piston  608 , which divides the attic cylinder into upper attic air space  607  and lower hydraulic reservoir  637 . Attic cylinder  601  also includes inlet  602  and exhaust outlet  603  that allows for pressurization of attic air space  607 , both of which include a plug for sealing the opening. Inlet  602  also includes check valve  604 , which allows for fluid to enter air attic space  607 . Any check valve or one-way valve, such as a ball check, diaphragm, or swing check valve, can be used. In this embodiment, a check valve with a 5 to 15 psig cracking pressure is contemplated. Exhaust outlet  603  also includes pressure relief valve  605  to prevent over pressurization of attic air space  607 . Again, any valve or one-way valve, such as a ball check, diaphragm, or swing check valve, can be used. In this application, a check valve with a 75 psig cracking pressure is contemplated to maintain attic air space at 75 psig. 
     The attic air space is pressurized by removing the plugs from inlet  602  and exhaust outlet  603  and introducing a fluid, preferably a compressible gas such as air or nitrogen, into attic air space  607 . Once the pressure in attic air space  607  reaches 75 psig, pressure relief valve  605  opens, signaling that the attic air pressure has reached the desired pressure. The fluid source is then removed and inlet  602  and exhaust outlet  603  are plugged. 
     The attic air pressure provides the force to floating piston  608  that causes piston  608  to move in response to changes in the hydraulic reservoir volume. For example, as hydraulic fluid is pumped from hydraulic reservoir  637 , the volume of hydraulic reservoir  637  is reduced. The compressed fluid in air attic space  607  expands and forces floating piston  608  to move toward the distal end of attic cylinder  601 , thus reducing the volume of hydraulic reservoir  637  and preventing air pockets from forming in the reservoir. Floating piston  608  is dimensioned to fit within the inner diameter of attic cylinder  601  and includes seals, such as rubber O-rings, at its interface with the cylinder to prevent hydraulic fluid from entering attic air space  607 . Additionally, conductor rod  621  extends through attic cylinder  601  to allow control signals to be transmitted from through attic cylinder  601  and to insulated contact  611 . This conductor rod can be made of any conductive material, including, for example, metallic conductors such as aluminum, cooper, gold, and silver and non-metallic conductors such as graphite. Floating piston  608  includes an opening allowing the piston to slide on conductor rod  621 . Floating piston  608  includes a non-conductive material  609  that contacts conductor rod  621 . Non-conductive material  609  allows piston  608  to contact conductor rod  621  without allowing the electric control signals to energize piston  608  and, thus, tool  600 . Non-conductive material  609  may also include seals, such as O-rings, to provide seals between the non-conductive material  609  and conductor  621  and between non-conductive material  609  and piston  608 . These seals prevent hydraulic fluid from leaking into attic air space  607 . 
     The distal end of attic cylinder  601  includes two fluid passageways allowing for fluid communication with hydraulic reservoir  637  in pressure cylinder  620  and upper cylinder  630 . One passageway is defined at one end by outlet check valve  623 . Outlet check valve  623  allows for hydraulic fluid to pass from hydraulic reservoir  637  in attic cylinder  601  to hydraulic reservoir  637  in pressure chamber  620 . The other passageway is defined by inlet check valve  624 . Inlet check valve  624  allows hydraulic fluid to pass from hydraulic reservoir  637  pressure chamber  620  to hydraulic reservoir  637  in attic cylinder  601 . As with the check vales described above, any valve or one-way valve, such as a ball check, diaphragm, or swing check valve, can be used. In this application, a check valve with a 75 psig cracking pressure is contemplated. Inlet check valve  623  and outlet check valve  624  allows for removal of attic cylinder  601  from the pressure cylinder  620  while preventing leakage of hydraulic fluid form the attic cylinder. 
     Attic cylinder  601  also includes upper contact  626 , contact spring  625 , and lower contact  627  that transmit the control signal from conductive rod  621  through upper contact  626 , through contact spring  625 , and through lower contact  627 . Contact spring  625  is compressed when attic cylinder  601  is connected with pressure cylinder  620  and provides the force to maintain lower contact  627  seated against contact terminal  611 . Upper contact  626 , lower contact  627 , and contact spring  625  are preferably surrounded by an insulation material to prevent transmission of the electrical control signal to the tool. Additionally, the upper contact  626 , lower contact  627 , and contact spring  625  are sealed such that hydraulic fluid cannot leak either into or out of the attic cylinder. 
       FIGS. 7A-7B  show retrofitted setting tool  700  after the tool has moved through the setting stroke motion. After a control signal is sent through contact rod  721 , upper contact  726 , contact spring  725 , and lower contact  727  to the insulated contact terminal  711 , control logic in the controller and gear motor  777  is activated. The controller can be programmed to energize the motor and run the pump while contact terminal  711  is activated, for a set period of time, until all hydraulic fluid is pumped, for a specific stroke length, or until a specific pump outlet pressure is obtained. Further, the pump control logic and be programmed to vary the stroke speed, the stroke pressure, and other timing elements. Once the energized, hydraulic pump  780  transports hydraulic fluid through pump outlet  784  and discharge rod  785  through passage  735  way in the cylinder connector  733 . This exerts pressure on the face of piston  741  and forces piston  741  to travel down toward the distal end of lower cylinder  740 . The hydraulic fluid accumulates in a reservoir created in lower cylinder  740  between the piston  741  and the lower face of the cylinder connector  733 . Additionally, the volume of hydraulic reservoir  737  in attic cylinder  701  is reduced and the fluid in attic air space  707  expands to force floating piston  708  toward the distal end of the attic cylinder, thus minimizing the volume of hydraulic reservoir  737  and minimizing the possibility for the formation of an air pocket that could cause the pump to air lock. 
     An alternative preferred embodiment is show in  FIGS. 8A-8C . In this embodiment, firing head, pressure chamber, and upper cylinder of the prior art cylinder depicted in  FIG. 1  are removed and replaced with a conversion assembly  820  as illustrated in  FIGS. 8A and 8B . Conversion assembly  820  includes a cylinder with an upper or proximal end dimensioned to receive firing head  810 . The conversion assembly also includes insulated contact terminal  811 , male, female electrical connection  813 , a motor controller and gear motor  877 , hydraulic pump  880 , and check valve  886 . The insulated contact terminal  811  is connected to one part of male, female connection  813  using multi-strand wire  815 . The other part of the male, female connection  813  is connected to motor controller and gear motor  877 . Pump  880  includes an inlet  882  that allows low pressure hydraulic fluid to enter the pump and an outlet  884  that allows high pressure hydraulic fluid to exit the pump  880 . The pump outlet is in fluid communication with check valve  886 . As with the check vales described above, any valve or one-way valve, such as a ball check, diaphragm, or swing check valve, can be used. In this application, a check valve with a 250 psig cracking pressure is contemplated. A reset fluid path is also included. Conversion assembly  820  may also include reset tandem sub  833 . Reset tandem sum  833  provides fluid pathway  835  from pump outlet  884  to check valve  886 . This pathway allows pump  880  to pump hydraulic fluid and forces piston  841  toward the distal end of the tool and, in turn, forces piston rod  843  down through cylinder head  850 , causing cross link  860  to stroke. Reset tandem sum  833  also provides a return fluid pathway  837  that allows hydraulic fluid to return to hydraulic reservoir  837 . Preferably, the passageway includes a ball valve that can be opened to allow fluid to flow into hydraulic reservoir  837  to reset the tool for use. 
       FIG. 9  shows retrofitted setting tool  900  after the tool has moved through the setting stroke motion. After a control signal is sent to insulated contact terminal  911 , control logic in controller and gear motor  977  is activated. The controller can be programmed to energize the motor and run the pump while the contact terminal  911  is activated, for a set period of time, until all hydraulic fluid is pumped, for a specific stroke length, or until a specific pump outlet pressure is obtained. Further, the pump control logic and be programmed to vary the stroke speed, the stroke pressure, and other timing elements. Once the energized, hydraulic pump  980  transports hydraulic fluid through pump outlet  984  and valve  986  through passage  935  way in rest tandem sub  933 . This exerts pressure on the face of piston  941  and forces piston  941  to travel down toward the distal end of the lower cylinder  940 . The hydraulic fluid accumulates in a reservoir created in the lower cylinder  940  between the piston  941  and the lower face of reset tandem sub  933 . 
     As described above, setting tool  900  can be reset by placing the setting tool on the resetting tool described above. The return fluid passageway is opened and the weight of setting tool  900  is used to force the hydraulic fluid to return to hydraulic reservoir  941  by forcing cross link  960  up to the lower cylinder  940 . Once reset, the return fluid passageway is closed and the tool is reset for use. 
     Setting tool  900  can also be configured for horizontal applications by adding an attic cylinder as described above. 
     Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Summary:
A method and apparatus for retro-fitting an explosive setting tool to a non-explosive setting tool is provided to eliminate the use of pyrotechnics when setting auxuliary tools. An explosive setting tool is retro-fitted by removing the pyrotechnic elements of the tool and replacing them with a conversion assembly including a hydraulic pump, thus converting the explosive tool into a non-explosive tool. The hydraulic pump provides the energy necessary to set the auxiliary tool. Once the auxiliary tool has been set, the non-explosive setting tool can be brought to the surface and reset using a resetting tool.