KCM Multiple-use Circulating Valve (rated to 10 000 psi)
KCM Multiple-use Circulating Valve (rated to 10 000 psi)
KCM Multiple-use Circulating Valve (rated to 10 000 psi)
It is designed for sealed separation and communication between the annulus and the interior of tubing.
DESCRIPTION APPLICATION
- in emergency situations to kill the well when used jointly with a packer;
- in combination with a packer during formation hydraulic fracturing as well as various well operations in the course of well completion and operation.
ADVANTAGES
- these valves can be used multiply for one tripping operation;
- proven by years of successful application experience;
- low price;
- high repairability.
DESIGN FEATURES
- the valve is opened by generating annulus pressure that exceeds the pressure inside the valve and the tubing.
KCM VALVE SCHEME
1. THE VALVE IS CLOSED
2. THE VALVE IS OPEN
The valve is open after generating the initial annulus pressure which exceeds the inner tubing pressure. This causes the ring to break, the piston to move downwards and circulating ports to open. To keep the the valve further open a pressure difference of 290±145 psi must be generated.
3. THE VALVE IS CLOSED
The valve is closed after equalizing the pressure between the tubing annulus and interior. The spring brings the piston back to its initial position, the circulating ports are shut off.
SPECIFICATIONS
| Type | Code | Minimum inner diameter for
the production string, in | Pressure differential required to
initially open the valve, psi | Maximum temperature for
the operating environment, F | Pressure differential required to
open the valve in case the ring breaks up (after the initial opening), psi | Equivalent diameter for
the side ports, in | Maximum inner pressure sensed by
the valve (inside the tubing), psi | Overall dimensions, in | Weight, lb, not more than | Plain-end NUE connection thread* | ||
| OD, not more than | ID | length, not more than | ||||||||||
| KCM-112 | AХA 2.505.021 | 4.67 | 1080±1451 | 302 | 1000±145 | 0.82 | 7250 | 4.41 | 2.36 | 21.3 | 51.8 | 3 1/2” |
| KCM-114 | AХA 2.505.001 | 4.67 | 10000 | 4.49 | 2.36 | 21.0 | 39.7 | |||||
| KCM-118 | AХA 2.505.001-01 | 4.90 | 4.65 | 2.36 | 44.0 | |||||||
| KCM-136 | AХA 2.505.002 | 5.67 | 1.06 | 5.35 | 2.99 | 24.2 | 83.8 | |||||
| KCM-140 | AХA 2.505.002-01 | 5.79 | 5.51 | 2.99 | 90.4 | |||||||
*Other threads are available upon request.
2Pressure differential required to initially open the valve can be modified upon the customer’s request within the range of 870 to 2320 psi.
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