CAMTOP Kelly Valve is a manually operated ball type drill stem valve for upper and lower Kelly connections, providing 90° quick open/close well control for drilling operations.
CAMTOP Kelly Valve
Description
|
2 Types Upper & Lower Kelly Valve |
3 Pressures 5,000 / 10,000 / 15,000 PSI |
90° Operation Quick Open & Close |
Product Overview
CAMTOP Kelly Valve is a manually operated ball type drill stem valve, divided into upper Kelly valve and lower Kelly valve. The upper Kelly valve is connected between the lower end of the swivel and the upper end of the Kelly; the lower Kelly valve is connected between the upper end of the drill pipe and the lower end of the Kelly, or between the lower end of the Kelly and saver subs.
The valve can be opened or closed by only turning the special operating wrench 90° according to the indicating direction. During drilling operation, Kelly valves are installed at both the upper and lower ends of the Kelly to provide reliable well control.
Sealing Principle
The sealing principle of the Kelly valve is that the ball is positioned and provided with preceeding stress by the lower seat supported by spring load, forming a close seal between the ball and ball seat. During normal drilling operation, the hole is kept unblocked by turning the stem to the “on” position. In case of kick or blowout, turn the operating stem to the “off” position to close off the internal bore of the drill string. The kick or blowout accident is avoided due to the high-pressure sealing situation between the ball and ball seat.
Specifications – Upper Kelly Valve
| Model | O.D. (mm) | Thread Connection (LH) | I.D. (mm) | Max. Sealing Pressure (MPa) |
|---|---|---|---|---|
| CS 146 | 146 | 4 1/2 REG | 50 | 68.6 |
| CS 200 | 200 | 6 5/8 REG | 76.2 | 68.6 |
Specifications – Lower Kelly Valve
| Model | O.D. (mm) | Thread Connection | I.D. (mm) | Max. Sealing Pressure (MPa) |
|---|---|---|---|---|
| XS105 | 105 | NC31 | 41.3 | 68.6 |
| XS121 | 121 | NC38 | 50 | 68.6 |
| XS127 | 127 | NC38 | 50 | 68.6 |
| XS165 | 165 | NC46 | 61 | 68.6 |
| XS178 | 178 | NC50, 5 1/2 FH | 71.4 | 68.6 |
Key Features
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Manually Operated Ball Valve Reliable ball type drill stem valve design for direct rig floor control. |
90° Quick Open/Close Simple 90° turn of the operating wrench switches between on and off positions. |
|
Spring-Loaded Ball Seat Lower seat supported by spring load maintains pre-load stress for consistent sealing. |
High-Pressure Sealing Rated up to 68.6 MPa max sealing pressure for demanding well control scenarios. |
|
Upper & Lower Configurations Available as upper Kelly valve and lower Kelly valve to suit Kelly/drill pipe layout. |
API Thread Connections Standard REG, NC and FH thread connections for compatibility with API drill string. |
When Ordering Please Specify
| ✔ Upper or Lower type | ✔ Tool O.D. | ✔ Working Pressure: 5,000 / 10,000 / 15,000 PSI | ✔ Tool connection |
Applications
| ▶ Rotary drilling operations | ▶ Kick and blowout prevention | ▶ Workover and well servicing |
| ▶ HPHT well control | ▶ Onshore drilling rigs | ▶ Offshore drilling platforms |
Contact CAMTOP for a QuoteGet competitive pricing and technical support for CAMTOP oilfield tools.
✉ SALES@CPOSL.COM |
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