V-80R1.U.05 Set of subs with safety device
A set of subs with a safety device is designed to prevent their spontaneous unscrewing from the VE-80R1 or VB-80R1 swivel during its operation. The device securely maintain the subs when the swivel rotates.
| Parameter name | V-80R1.U.05 | V-80RR1.U.05 |
| Cargo capacity, kN (tf) | 800 (80) | 800 (80) |
| Working pressure, PSI (atm) | 3086 (210) | 3086 (210) |
| The sub feedthrough hole diameter, mm | 54 | 54 |
| The stem coupling thread as per GOST 631-75 | DP-114 L.H. | DP-114 |
| The sub coupling thread as per API 7 | NC-31 L.H. | NC-31 |
| Range of crimped OD of the kelly stem, mm | 104,5...106,5 | 104,5...106,5 |
| Range of crimped OD of the stem, mm | 113,5...115,5 | 113,5...115,5 |
| The clamp bolts coupling thread | М16 | М16 |
| Tightening force of one clamp bolt, kN | 85,5 | 85,5 |
| Tightening torque of one clamp bolt, N*m | 244 | 244 |
| Weight, kg, no more | 60 | 60 |
| Overall dimensions, not more than, mm | 280х200x450 | 280х200x450 |
Operating ambient temperature, °К (°С): 233(-40) ÷ 343 (+70).
Operating environment: drilling mud, formation water, gas (gas condensate) with H2S and CO2 content of no more than 0.003%.
Flow part material: steel 5140 AISI with special heat treatment.
Corrosion-resistant version K2 is possible.
The set structure
The set consist of upper and lower V-band with hardened metal toothed hubs (Fig. 2 position A and C), Top Sub with a BOX thread DP-114 to PIN thread NC-31 API 7 (Fig. 2 position B). The toothed hubs are secured in the clamps using a dovetail joint to prevent them from falling out and are fixed with a bolt to prevent displacement in the longitudinal direction. The clamps are designed to allow movement and provide a difference in the outer diameters of the crimped part of 2 mm. The clamping bolts have a hexagonal head with width across flats.
The sub (Fig. 2 position B) is permanently screwed to the stem, and the Kelly stem can be quickly unscrewed and replaced when the thread wears out. Thus, the service life of the stem increases many times over, since it does not require constant screwing and unscrewing along the DP-114 thread.
By purchasing this device, you save significant funds on major repairs of swivels, while receiving reliable fixation of both adapters on the swivel barrel and prompt replacement of the lower adapter if necessary.
