Endless Rod Unit

ERU – VERTICAL WAGGLE TAIL  

The Lifting Solutions ERU is a highly specialized well-servicing rig. It is designed to install or remove Endless Rod. The main components of the ERU are the carrier, the rig base, mast, main winch and pulling unit. The carrier refers to the actual vehicle that transports the rig. The rig base can be further broken down into the deck and articulating slide frame. 

The primary component of the ERU is the free-standing mast assembly. Everything required for the operation of the rig is run in conjunction with the mast. The main hook and travelling blocks are run up and down the mast using the main winch on a trolley system. The mast and main winch are mounted on an articulating slide frame to allow the mast to be centered over the wellhead. 

The guide winch is used to position the rod guide assembly prior to servicing a well. The Rod Guide assembly is used to guide the continuous rod when coming out of the top of the pulling unit and down to a storage reel on the ground. The main winch assembly is made up of a two-speed hydraulic motor (some units have single speed), band brakes and a clutch assembly that disengage for freefalling jarring capability. The hydraulic main winch is capable of heavy pulling (i.e., unseating a pump at the end of a string of continuous rod). The ERU is also equipped with a smaller auxiliary winch. The auxiliary winch is used in conjunction with a rotating auxiliary winch arm swivel unit located on the mast crown and is used for handling equipment used in the normal servicing of a well. At the top of the mast (crown) is a safety device known as a crown saver. This device will apply the brakes on the winch if it were to raise a load too high in the mast. 

A main component within the mast is the pulling unit. The pulling unit can be raised or lowered within the mast as needed to adjust to the height of the wellhead. The pulling unit uses its pressure beams to force the gripper pads against the Endless Rod. The pressure beams have a set of roller chains which allow the gripper chains to roll freely past the beams. A safety clamp system is situated below the pulling unit and is designed to stop and hold the Endless Rod in case of an emergency.  

Features

• Safely and efficiently services vertical wells 
• The primary component of the Vertical ERU is the free-standing mast assembly. Everything required for the operation of the rig is run in conjunction with the mast. 
• Ability to disengage main winch band brake and clutch assembly for freefalling jarring capabilities  
• Pulling unit can be raised and lowered within the mast as needed to adjust to different height of wellheads 

Specifications

• 58ft x 50,000lb or 65,000lb pull capacity (vertical)
• Mast: 58ft from the bottom of the crown to the ground   
• 35 meters/minute gripper speed 
• Two mast-mounted utility winches 
• Mast Load Ratings – In Vertical Position 50,000 lb (22 240 daN) or 65,000 lb (28,900 DaN)
• Mast Load Ratings – In Slant Position with Outrigger Anti-Skid Beam 42,000 lb (18 680 daN) 
• Mast Load Ratings – In Slant Position without Outrigger Anti-Skid Beam 35,000 lb (15 570 daN)