Trust your Freeze Applications to the Momentum Pressure Control Professionals. We have years of experience in Freeze Applications for a wide range of situations with pressures of up to 7,500 Psi. Momentum Pressure Control knows that safety of any freeze application is directly related to experience – our team is the most highly trained and skilled you will find in the industry.
Freeze Applications are commonly used in situations no other practical means of containing pressure to replace damaged equipment or to allow access without killing the well. It is an inexpensive and safe way to control well pressures during regular well maintenance where removal of the wellhead, pipeline or auxiliary equipment is required.
Typical Freeze Application Process:
- An area is displaced with a “plug” of uncontaminated bentonite gel mixed to a thick slurry.
- The gel plug is frozen in place by use of dry ice (solid CO2) contained with a cribbing and tamped manually to keep in contact with the area to be frozen at all time.
- The methods used depend on what the area to be frozen contains or has contained or whether there is a leak to atmosphere from the area to be frozen.
- Pressure testing is always done to 1 ½ times the surface pressure of the well, or to the maximum well head pressure rating.
Diagram of Freeze Application:
Hot Tap operations are used in the following situations:
- An obstruction in tubulars during tripping operations and trapped pressure is suspected
- The need to enter an existing production line in a plant without depressurizing the line
- A valve that needs replacing on a producing well where killing or depressurizing the well is not wanted
- Re-entry into an abandoned or suspended well
- In conjunction with Freeze
The Hot-Tapping Process:
- Blockage is located and tubing is lifted until blockage is clear of well
- A Hot Tap clamp is secured on the tubing below the blockage and above the next coupling
- A full opening valve is attached to the Hot Tap clamp
- A drill is installed and the distance from fully retracted to extended touching tubing is measured
- The drill, valve and clamp assemblies are pressure tested to a minimum of 1.5 times the anticipated pressure or up to the maximum working pressure of the equipment being used
- The pressure on the drill is decreased to slightly less than anticipated tubing pressure. During this procedure, an increase in pressure on the drill side indicates penetration
- Once the hole is drilled, the shaft of the drill is retracted past the valve allowing the valve to close. The pressure is then bled off the drill allowing the drill to be removed
- Depressurize, freeze or pumping operations can commence
Diagram of Hot-Tap Operation:
Hot Tap Unit Specifications:
- 5000 Psi working pressure manual drill for added control, with an air drill adapter.
- Comes with a pump for pressure testing and equalizing drill.
- Stroke: 24″, 30″, 36″ (longer stroke units available upon request)
- Bit size: ½” – 2″ hole saw adapter available; 2″ – 6″ diameter
- Saddle clamps: from 1″ to 9 5/8 ” – other sizes available upon request
- All equipment meets NACE specifications
- Helli-portable for use in remote locations