Abstract: The present invention pertains novel coiled tubing units and methods of stabbing. The coiled tubing unit has a tubing reel; a tubing guide operably connected to the tubing reel; and an injector operably connected to the tubing guide. The injector is configured to move toward or away from the tubing reel. This advantageously allows for more convenient, effective, and/or potentially safer stabbing methods to be employed.

Abstract: The present invention pertains novel coil tubing units and methods of stabbing. The coiled tubing unit has a tubing reel; a tubing guide operably connected to the tubing reel; and an injector operably connected to the tubing guide. The injector is configured to move toward or away from the tubing reel. This advantageously allows for more convenient, effective, and/or potentially safer stabbing methods to be employed.

Abstract: An auxiliary dolly attachable to the rear of a primary trailer includes a first portion attachable to the primary trailer, a second portion comprising one or more axles with wheels, and a pivot point at which the first portion is coupled to and movable relative to the second portion, and further includes one or more cylinders configured to adjust the first and second portions relative to each other and apportion weight between the primary trailer and the auxiliary dolly.

Abstract: The present application pertains to a coiled tubing injector system. The system comprises a coiled tubing injector; an injector tilt configured to be mounted to a trailer wherein the injector tilt is configured to receive the coiled tubing injector; a securing mechanism to secure the coiled tubing injector to the injector tilt; and a sensor configured to detect whether the securing mechanism is positioned to substantially secure the coiled tubing injector to the injector tilt. Advantageously, the system is configured such that the injector can only be tilted if the sensor detects that securing mechanism is positioned to substantially secure the coiled tubing injector to the injector tilt.

Abstract: A variable sized coiled tubing counter is described herein. The variable sized coiled tubing counter includes a plurality of rollers. At least one roller is a floating roller which is allowed to travel and may be connected to a tension assembly. The variable sized tubing counter typically includes a counter which is rotationally connected to a floating counting roller using a somewhat flexible axle. As coiled tubing passes through the tubing counter, the length of tubing is determined based on the number of rotations of the counting roller. The use of floating, tensioned rollers allows the disclosed tubing counter to be utilized with multiple diameters of coiled tubing without significant adjustment to the tubing counter or changing components of the tubing counter.

Abstract: The present invention pertains novel coil tubing units and methods of stabbing. The coiled tubing unit has a tubing reel; a tubing guide operably connected to the tubing reel; and an injector operably connected to the tubing guide. The injector is configured to move toward or away from the tubing reel. This advantageously allows for more convenient, effective, and/or potentially safer stabbing methods to be employed.

Abstract: The present invention pertains novel coiled tubing units and methods of stabbing. The coiled tubing unit has a tubing reel; a tubing guide operably connected to the tubing reel; and an injector operably connected to the tubing guide. The injector is configured to move toward or away from the tubing reel. This advantageously allows for more convenient, effective, and/or potentially safer stabbing methods to be employed.

Abstract: A variable sized coiled tubing counter is described herein. The variable sized coiled tubing counter includes a plurality of rollers. At least one roller is a floating roller which is allowed to travel and may be connected to a tension assembly. The variable sized tubing counter typically includes a counter which is rotationally connected to a floating counting roller using a somewhat flexible axle. As coiled tubing passes through the tubing counter, the length of tubing is determined based on the number of rotations of the counting roller. The use of floating, tensioned rollers allows the disclosed tubing counter to be utilized with multiple diameters of coiled tubing without significant adjustment to the tubing counter or changing components of the tubing counter.

Abstract: A control system for moving a bottom hole assembly at an end of a coiled tubing string in a wellbore includes a controller configured to move the bottom hole assembly at an initial rate, unless the controller determines that moving the bottom hole assembly at the initial rate causes a predetermined threshold parameter to be reached, whereupon the controller is configured to default to moving the bottom hole assembly at a safe rate.

Abstract: A clutch mechanism includes a meshing arrangement between a first plurality of teeth on a first component coupled to a driven shaft and a corresponding second plurality of teeth on a second component coupled to a driving shaft.

Abstract: An oilfield assembly including a pump in fluid communication with a string of coiled tubing on a tubing reel through a coiled tubing swivel assembly, includes a fluid inlet segment coupled to a swivel body having a central axis, and a rotatable hollow shaft having a portion that extends axially within the swivel body, wherein the fluid inlet segment, swivel body and hollow rotatable shaft form a conduit for passage of a pumped substance to the tubing reel from the pump. The rotatable shaft includes a first end attachable to the tubing reel, and a distal second end, at least part of which is configured to engage a corresponding indentation in the body, thereby preventing direct contact between the distal end of the shaft and the pumped substance.

Abstract: A coiled tubing transport unit includes a coiled tubing reel unit, a guide sleeve coupled to the coiled tubing reel unit, and a corresponding arm coupled to the coiled tubing transport unit, wherein the arm is retractable or extendable from the guide sleeve, and a hydraulic cylinder coupled between the coiled tubing reel unit and the transport unit. The arm retracts or extends from the guide sleeve when the hydraulic cylinder is actuated to push or pull against and move the coiled tubing reel unit along a length of the coiled tubing transport unit.

Abstract: A coiled tubing injector head unit includes a first bearing carrier and a second bearing carrier attached to a frame of the injector head unit that support an input drive shaft extending between the first and second bearing carriers, a sprocket shaft coupled to the input drive shaft that supports a pair of continuous parallel drive chains that revolve in a common plane and have opposed, elongated parallel runs spaced apart to form a path for engaging tubing passing there through, and a hydraulic motor attached to the frame opposite the first bearing carrier, and a gearbox attached to the frame opposite the second bearing carrier, wherein the input drive shaft is operatively connected to and extends between, but is not supported by, the hydraulic motor and the gearbox.

Abstract: An auxiliary dolly attachable to the rear of a primary trailer includes a first portion attachable to the primary trailer, a second portion comprising one or more axles with wheels, and a pivot point at which the first portion is coupled to and movable relative to the second portion, and further includes one or more cylinders configured to adjust the first and second portions relative to each other and apportion weight between the primary trailer and the auxiliary dolly.

Abstract: A multi-axle transport trailer having a plurality of axles includes a suspension comprising air bags associated with each axle, the air bags in communication with an air source, wherein air bags associated with different axles are capable of having different air pressures therein. The trailer further optionally includes a steering system associated with at least one axle, the axle including a tie rod connected between wheels on both ends of the axle, the steering system comprising cylinders configured to articulate the wheels, and a sensing device configured to monitor movement of the tie rod and facilitate actuating the cylinders to turn the wheels.

Abstract: A control system for moving a bottom hole assembly at an end of a coiled tubing string in a wellbore includes a controller configured to move the bottom hole assembly at an initial rate, unless the controller determines that moving the bottom hole assembly at the initial rate causes a predetermined threshold parameter to be reached, whereupon the controller is configured to default to moving the bottom hole assembly at a safe rate.

Abstract: A method of mixing liquids in a tank includes inputting a first liquid into the tank through a first inlet, inputting a second liquid into the tank through a second inlet near the bottom of the tank and directing the second liquid towards a mixing paddle within the tank, and rotating the mixing paddle, thereby forming a mixture within the tank.

Abstract: A method of controlling rates of moving a coiled tubing string in a wellbore includes providing an injector head control system for moving a bottom hole assembly at an end of the coiled tubing string in the wellbore, that maintains operating settings of the injector head if the control system determines that the bottom hole assembly is moving in the wellbore within a range of rates, and varies operating settings of the injector head if the control system determines that the bottom hole assembly is moving in the wellbore outside the range of rates, to thereby revert to moving the bottom hole assembly in the wellbore within the range of rates. The control system determines whether the bottom hole assembly is moving within or outside the range of rates based on one or more sources of feedback from both the bottom hole assembly and the injector head.

Abstract: A mixing tank disposed onboard a unit for coiled tubing oilfield operations includes a mixing paddle within the mixing tank capable of agitating liquids therein, a water inlet capable of introducing water into the mixing tank and directing water flow toward the mixing paddle, and one or more chemical inlets capable of introducing one or more chemicals from chemical storage units into the mixing tank.

Abstract: A system for controlling a coiled tubing injector head includes a hydraulic control line in fluid communication with each drive motor, a valve associated with one or both hydraulic control lines, and a sensor associated with each drive motor. Each sensor is configured to output to a digital computer a signal representative of a motor speed, and at least one valve associated with a hydraulic control line is operable to regulate pressure in the hydraulic control line and thereby increase or decrease the speed of the corresponding motor until both speed sensors report substantially matching motor speeds.