Selective  Running  Tool  For  Lock  Mandrel

• The ” SRO” and ” SXO” Running Tools are used to run, locate, and set the Type “SR”/”SRN”, “SX”/”SXN” Locks and subsurface safety equipment.
• The ” SRO” and ” SXO” Running Tools require downward jar action to lock the keys of the lock mandrel and upward jar action to release it from the lock. 

The ” SRO” and ” SXO” Running Tools hold the keys of the lock mandrel in the retracted position until the desired landing nipple is located by the locator dogs on the running tool. The lock mandrel is held onto the running tool by means of the retainer dogs and a shear pin. The retainer dogs grasp the inside of the fishneck of the lock mandrel, while a shear pin is installed through the packing mandrel of the lock and the core of the running tool. After the bottom shear pin is sheared and the core moves up by way of the core spring, the retainer dogs collaspe in the cores groove and releases the fishneck of the lock. Some of the ” SXO” Running Tools can be converted to ” SRO” Running Tools by changing out certain parts as follows:

The 1.710″ ” SRO” Running Tool is the same as a 1.500″ ” SXO” Running Tool except for the locator dogs and the dog retainer.

The 1.781″ ” SRO” Running Tool is the same as a 1.875″ ” SXO” Running Tool except for the locator dogs and the core ( 2.125″ ” SRO” )

The 1.875″ ” SRO” Runnng Tool is the same as a 1.875″ ” SXO” Running Tool except for the core ( 2.125″ ” SRO” )

The 2.125″ ” SRO” Running Tool is the same as a 1.875″ ” SXO” Running Tool except for the locator dogs, dog retainer, and the core.

The 2.188″ ” SRO” Running Tool is the same as a 2.313″ ” SXO” Running Tool except for the locator dogs and the core.

The 2.313″ ” SRO” Running Tool is the same as a 2.313″ ” SXO” Running Tool except for the core ( 2.188″ ” SRO” )

The 2.562″ ” SRO” Running Tool is the same as a 2.313″ ” SXO” Running Tool except for the locator dogs and the dog retainer.

The ‘SXN’ Running Tool is designed to run flow control devices attached to ‘SRN’ and ‘SXN’ Lock Mandrels assembly and locate & lock them into the bottom nipple at the end of tubing string.

The type ‘SXN’ Running Tool has been designed such that the Dog Retainer on the running tool will not release the fishing neck of the lock mandrel assembly until the fishing neck and expander sleeve have moved at least 80% of their travel. The ‘SXN’ Running Tool is used to run and set, then release from the Lock Mandrels assembly.

Features and Benefits

• It allows a variety of sizes or quantities of shear pins to be used to jar the lock mandrel and flow control device into the landing nipple, depending on the anticipated difficulty of packing interference.
• Once the locking mandrel expander sleeve has fully moved down to full distance in locked position, relative motion within the running tool is eliminated by the Dog Retainer which locks the core to the body of the tool.
• There are two shear pin positions in the running tool provided the option to pin the tool for different run in position. One position causes the keys in the lock mandrel to be retracted. This set up is used when running the ‘SRN’ or ‘SXN’ Lock Mandrel with a no-go OD. The other position causes the keys of the lock mandrel to be in the expanded position and is used when to run the ‘SXN’ lock mandrel.