Integrated skidding rig system

Abstract

A rig system and a method for drilling a well. The rig system includes a movable central package including one or more devices to drill a well using a drill pipe, a mud pump coupled with the movable central package and configured to pump mud thereto, and a cement pump coupled with the movable central package. The cement pump is operable in a first mode in which the cement pump pumps cement to the well, and a second mode in which the cement pump pumps mud to the well.

What is claimed is: 
     
         1 . A rig system, comprising:
 a movable central package comprising one or more devices to drill a well using a drill pipe;   a mud pump coupled with the movable central package and configured to pump mud thereto; and   a cement pump coupled with the movable central package, wherein the cement pump is operable in a first mode in which the cement pump pumps cement to the well, and a second mode in which the cement pump pumps mud to the well.   
     
     
         2 . The rig system of  claim 1 , wherein the movable central package is movable relative to the mud pump and the cement pump, and wherein the movable central package is configured for batch drilling. 
     
     
         3 . The rig system of  claim 1 , wherein the mud pump is configured to pump the mud in a first mode, and wherein the mud pump is configured to pump cement to the central package in a second mode. 
     
     
         4 . The rig system of  claim 1 , further comprising a combined skid that is movable along with the movable central package, wherein the combined skid comprises a managed pressure drilling system and a shaker assembly. 
     
     
         5 . The rig system of  claim 4 , wherein the combined skid comprises a shale shaker configured to separate solids from liquid in drilling mud received from the well, and wherein the rig system further comprises a fluid-residue skid configured to receive a solids residue form the drilling mud. 
     
     
         6 . The rig system of  claim 1 , wherein the central package, the mud pump, and the cement pump each include a programmable logic controller configured to execute one or more commands independent of a centralized control system, and wherein the programmable logic controller of each of the central package, the mud pump, and the cement pump is configured to implement one or more commands from the centralized control system. 
     
     
         7 . The rig system of  claim 1 , further comprising a mud tank having a programmable logic controller coupled therewith, wherein the programmable logic controller of the mud tank is quasi-autonomous. 
     
     
         8 . The rig system of  claim 1 , wherein the central package, the mud pump, and the cement pump are coupled to separate variable frequency drives (VFD) and separate electric circuit breakers. 
     
     
         9 . The rig system of  claim 8 , wherein each of the VFDs is coupled to the respective electric circuit breaker of the respective one of the central package, the mud pump, and the cement pump. 
     
     
         10 . The rig system of  claim 1 , further comprising a trunk line coupled on one end to the mud pump and the cement pump, and on an opposite end to the central package, the trunk line comprising a high-pressure mud line, a high-pressure cement line, a mud return line, a cement return line, and at least one high-power electrical line. 
     
     
         11 . The rig system of  claim 1 , wherein the central package comprises a first panel, the rig system further comprising a second panel located proximal to the cement pump, the first panel being configured to control the cement pump when the cement pump is in the second mode, and the second panel being configured to control the cement pump at least when the cement pump is in the first mode. 
     
     
         12 . The rig system of  claim 11 , wherein the first and second panels are configured to communicate with a variable frequency drive of the cement pump to adjust a speed thereof, and wherein the first and second panels are configured to avoid sending inconsistent commands to the variable frequency drive. 
     
     
         13 . The rig system of  claim 1 , further comprising a cement tank coupled with the cement pump, wherein the cement tank comprises a first premixed cement for use in a first cementing operation, and a second premixed cement for use in a second cementing operation, wherein the first and second premixed cements have different compositions. 
     
     
         14 . A method for drilling a well using a movable rig, comprising:
 pumping a mud into a wellbore using at least one mud pump while drilling the wellbore;   pumping the mud into the wellbore using at least one cement pump in a first mode, while drilling the wellbore and while pumping mud into the wellbore using the at least one mud pump; and   pumping cement into the wellbore using the at least one cement pump in a second mode.   
     
     
         15 . The method of  claim 14 , further comprising controlling the at least one cement pump in the first mode using a first panel positioned on a central package, the central package comprising a movable drilling rig. 
     
     
         16 . The method of  claim 15 , further comprising controlling the at least one cement pump in the second mode using a second panel positioned proximal to the at least one cement pump, wherein the movable drilling rig is movable with respect to the second panel. 
     
     
         17 . The method of  claim 14 , further comprising connecting a central package to the at least one mud pump and to the at least one cement pump using a trunk line, wherein the central package is movable with respect to the at least one mud pump and the at least one cement pump. 
     
     
         18 . The method of  claim 17 , further comprising:
 independently controlling an operation of the central package using a first controller and a first variable frequency drive, the first controller and the first variable frequency drive being coupled to the central package.   independently controlling an operation of the at least one cement pump using a second controller and a second variable frequency drive, the second controller and the second variable frequency drive being coupled to the at least one cement pump.   independently controlling an operation of the at least one mud pump using a third controller and a third variable frequency drive, the third controller and the third variable frequency drive being coupled to the at least one mud pump.   
     
     
         19 . A rig system, comprising:
 a movable central package comprising one or more devices to drill a well using a drill pipe;   a mud pump coupled with the movable central package and configured to pump mud thereto, wherein the mud pump is configured to pump the mud in a first mode, and wherein the mud pump is configured to pump cement to the central package in a second mode;   a cement pump coupled with the movable central package, wherein the cement pump is operable in a first mode in which the cement pump pumps cement to the well, and a second mode in which the cement pump pumps mud to the well;   a combined skid that is movable along with the movable central package, wherein the combined skid comprises a managed pressure drilling system and a shaker assembly;   a plurality of variable frequency drives (VFDs), wherein individual VFDs are separately coupled to the central package, the mud pump, and the cement pump; and   a plurality of controllers, wherein individual controllers of the plurality of controllers are separately coupled to the central package, the mud pump, and the cement pump, to provide quasi-independent control thereof,   wherein the movable central package is movable relative to the mud pump and the cement pump, and wherein the movable central package is configured for batch drilling.   
     
     
         20 . The rig system of  claim 19 , further comprising:
 a first panel coupled to the central package and being movable therewith, the first panel being configured to control the cement pump in the first mode; and   a second panel, wherein the central package is movable with respect to the second panel, the second panel being configured to control the cement pump in the second mode.