The Adjustable and Positive Chokes are designed and manufactured in accordance with API 6A, for pressures up to 10,000 PSI (700 bar).
These chokes are available in a large sizes range, and with various trims depending upon customer requirements.
The products are designed to perform according to the requirements of PR1 Performance Requirement Level and, on request, PSL1, PSL2 and PSL3 Product Specification Levels.
About Material class and Temperature classification, see Appendix A.
By means of a conversion kit, the adjustable type choke can very easily be converted to positive type choke. A wing union cap interchangeable with the adjustable type allows quick replacement of the choke bean.
Dimensions beyond range of afore mentioned table may be offered on request.

Technical and constructive characteristics

The Adjustable and Positive Chokes are designed and manufactured in accordance with API 6A, for pressures up to 10,000 PSI (700 bar).
These chokes are available in a large sizes range, and with various trims depending upon customer requirements.
The products are designed to perform according to the requirements of PR1 Performance Requirement Level and, on request, PSL1, PSL2 and PSL3 Product Specification Levels.
About Material class and Temperature classification, see Appendix A.
By means of a conversion kit, the adjustable type choke can very easily be converted to positive type choke. A wing union cap interchangeable with the adjustable type allows quick replacement of the choke bean.
Dimensions beyond range of afore mentioned table may be offered on request.

Technical and constructive characteristics

This type of valves is used in the oilfield industry for drilling and production operations for nominal pressures of 210, 350, 700 and 1050 bar (3000, 5000, 10000 and 15000 PSI).
Working medium: water, oil products, gases, steam or other fluids with low corrosion.

Constructive characteristics of the main components:

Available to meet all appropriate API 6A requirements.
The products are designed to perform according to the requirements of PR1 Performance Requirement Level and, on request, PSL1, PSL2 and PSL3 Product Specification Levels.
About Material class and Temperature classification, see Appendix A.
Body shape – straight.
Closing element – forged slab gate.
Stem – nonascending, threaded.
The bonnet is fasteneted to the body by threaded stud bolts.
Bi-directional flow.
The valve is connected to the pipe by flanges 6B and 6Bx type, acc. to API 6A, provided with sealing metallic rings.

Technical and constructive characteristics

Working and testing regime

Body-bonnet sealing: metal-to-metal
Body-gate sealing: metal-to-metal
Stem-bonnet sealing: rubber and PTFE

Pack-off flanges are usually used as a cross-over connection to adapt flanges of different pressure ratings or sizes and provide an extra safety seal of the casing.
There are pack-off flanges provided with one seal, recommended for pressures up to 5,000 PSI (350 bar) and pack-off flanges with two seals, recommended for pressures up to 15,000 PSI (1050 bar).
About Material class and Temperature classification, see Appendix A.
The type of Pack-off flange depends on the seal used in it.

Pack-off flanges with one seal

Pack-off with two seals

The Hand Pump is designed to supply all cavities of the stuffing box or body of valves with consistant grease.
The Hand Pump provides the lubricating up to 1050 bar (15,000 PSI) maximum pressure.

Constructive and technical characteristics:

• max. working pressure: 1050 bar
• working temperature: -30 ÷ +40°C
• dimensiuni de gabarit: 20×80(100)x7200 mm

Working temperature

Working fluids (according with Material class)

Materials for Wellheads

1) – only for Temp. class L, K

The running in and pulling out device for backpressure valves is delivered together with all accessories necessary for well shutting-off jobs, fracturing and acidization.

The running in and pulling out devices allow the displacement of master valves, after the mounting of back-pressure valves.

The technology of well shutting-off by setting a back-pressure valve or a plug in the tubing hanger avoids well killing with drilling mud, this offering considerable economical and time advantages.

The back-pressure valves and plugs are designed to withstand the working pressure of the X-mas trees in which they are mounted.
The size ratings of the back-pressure valves and plugs are according to API sizes of the tubing string.

Constructive and technical characteristics

• max. working pressure: 700 bar
• stem diameter: 30 mm
• max. stem stroke: 4300 mm

Working temperature

Working fluids (according with Material Class)

Materials for Valves

1) – only for Temp. class L, K

The tubing heads are used to suspend and to seal the tubings with 2 ⅜ in (60,3 mm), 3 ½ in (88,9 mm), 2 ⅞ in (73 mm) si 4 ½ in (114,3 mm) diameters.
The Tubing heads consist of a flanged spool in which a tubing hanger is suspended, locked by a special nut or by lock-down screws.
The tubing hanger is provided with a special thread for mounting – dismounting of back-pressure valves or test plugs.
The tubing flanges are provided with a seat for secondary seal of casing. The flanges and side outlets are in accordance with API Spec. 6A
About Material class and Temperature classification, see Appendix A.

Tubing heads

The casing head housings are used to suspend and to seal the casings.
The flanges and the passing inside diameters are designed according to API spec.6A.
About Material class and Temperature classification, see Appendix A.

The casing head housing is available with:

• female API 8RD threads for casings
• slip-on welded connection

The casing head housings are furnished with two threaded outlets or flanged studded outlets and have full-opening vertical bores meeting dimensional requirements of the API 6A.

Casing head housing

* – available value for maximum dimension of casing