Jeff Weber

13.0 Snubbing Jack
This jack assembly is designed to push (snub) and pull (lift) pipe into and out of a dead/pressurized wellhead utilizing three (3) hydraulically operated 170k, 7-1/16” slip bowls. This assembly is designed to be used as both a Stand-Alone snubbing unit, and a Rig Assist snubbing unit. This assembly is designed to work in conjunction with the Annular BOP and 2 x BOP stripping rams. This assembly will consist of the following components:

- Jack Plate
- Passive Rotary
- Traveling Snubbing Slip Bowls
- Control Panel(s)
- Upper Work Platform
- Stationary Snubbing Slip Bowls
- Stationary Heavy Slip Bowls
- Jack Cylinders
- Annular Preventor
- Upper stripping Ram
- Bleed off/ Equalize Spool
- Bleed off/Equalize Plug Valves (1” ID)
- Lower Stripping Ram BOP

13.1 Jack base
98. This assembly is designed so that the Annular can be split for changing elements in the Annular.
99. This assembly will be the main support structure for the hydraulic cylinders, workbasket, Annular BOP and Stationary Snubbing Slip bowl.
100. The jack base will have one (1) manually extendable ladder assembly

13.2 Passive Rotary System
101. The primary design of the rotary is to allow the snubbing unit to perform drilling/milling operations in both snub/lift situations. This Passive Rotary system works in conjunction with a power swivel if required.
102. All hydraulic hose connections are integrated quick disconnector type.
103. The passive rotary allows the unit the ability to set tools requiring rotation in pipe heavy or pipe light mode.

13.3 Jack Cylinders
104. The two (2) jack cylinders will be custom made and have a 6” (15.24cm) bore x 4” (10.16cm) rod x 10’ (3.05m) stroke.
105. The cylinders can produce a combined push (snub) force of 85,500 lbs. (38,555 kg.) and a combined pull (lift) force of 170,000 lbs. (77,110 kg.) These assemblies will be mounted to the jack base assembly.
106. Anti-wear bands on packing glands and pistons.
107. 3,000 Psi maximum working pressure
108. Hydraulic braking system for both lift and snub.

13.4 Jack cylinder control valve
109. This valve assembly will consist of a “Husco” 6400 pilot operated split spool control valve which controls the up and down motion of the jack cylinders.
This valve will be plumbed to include a high speed (regen)/low speed circuit on the up stroke of the jack cylinders. This allows the operator to run the jack cylinders at a higher speed on the up stroke. The regen selector will be in the workbasket under the operator’s console.
110. The hydraulic flow lines from the Husco valve to the jack cylinders will be steel piping. All other hydraulic flow lines on the snubbing jack assembly will be hydraulic hoses.
111. Counterbalance valves in up and down control circuits to control over running loads.
112. The split spool valve assembly will be mounted to the jack base assembly.
113. The “Husco” 5000 A62 pilot operated control valve will be mounted in the operator panel.