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: 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 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: 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: 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 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.

Abstract: A stripper adapter mounted on a coiled tubing injector head unit includes a swivel ring secured between an upper thrust washer and a lower thrust washer, wherein the swivel ring is rotatable 360 degrees about a longitudinal axis.

Abstract: A coiled tubing transport unit includes a coiled tubing reel unit, a first mechanism for shifting the coiled tubing reel unit lengthwise along the coiled tubing transport unit, an injector head, and a second mechanism for shifting the injector head lengthwise along the coiled tubing transport unit.

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: 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 lifting bale is mounted on top of an injector head for handling the injector head. The lifting bale includes a lifting arm attached to the injector head, an articulated member attached between the injector head and the lifting arm, the articulated member having a knee joint, and a cylinder, having an extendable and retractable arm, attached between the injector head and the knee joint. The cylinder arm is configured to be moved to raise the lifting arm, and is further configured to be extended and retracted to provide load balancing of the injector head.

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 injector head unit includes one or more drive chains revolving within a common plane mounted on an upper drive sprocket and a lower drive sprocket, wherein at least one of the upper and lower drive sprockets are configured to move vertically to tension the drive chains, and at least one fixed reference point proximate to at least one of the upper and lower drive sprockets, wherein relative positioning of one of the movable upper and lower drive sprockets with the fixed reference point indicates to a user an amount of elongation of the drive chains after a certain period of time.

Abstract: A tilt mechanism for manipulating an injector head mounted on a tiltable platform attached at one end to a pivot mount on a base structure includes an articulated member attached between the tiltable platform and the base structure, the articulated member having a joint and a cylinder attached between the base structure and the articulated member, wherein an arm of the cylinder is extended to push the joint of the articulated member to an over-center position, thereby locking the articulated member.

Abstract: A knee-joint mechanism for a folding gooseneck used in a coiled tubing unit, includes a main structure having a distal end pivotally attached thereto, the knee-joint mechanism including an articulated member attached between the main structure and the pivotally attached distal end of the gooseneck, the articulated member having a joint, and a cylinder attached between the main structure and the articulated member. The arm of the cylinder is extended to push the joint of the articulated member to an over-center position, thereby locking the articulated member.

Abstract: A cabin unit mounted on a horizontal platform includes a mechanism for locking the cabin unit when in a raised position above the horizontal platform. The locking mechanism includes an articulated member attached between the cabin unit and the horizontal platform, the articulated member including an upper support arm and a lower support arm coupled at a joint and a cylinder attached between the horizontal support and the articulated member. A cylinder arm is retracted to move the joint of the articulated member to a locked position while the cabin is in a raised position.

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.