Casings

APPLICATION OF FIBERGLASS CASINGS

- production wells;
- exploration wells;
- casing liners;

ANVANTAGES OF USING FIBERGLASS CASINGS:

- Period of operation for transportation of corrosive liquids more than 25 years;
- Piping systems are not subject to corrosion(pipe material inert to acids, salts, alkalis, hydrogen sulfide and oxygen-containing compounds);
- A small mass of pipes, which provides a high strength (average weight of fiberglass products up to 5 times less than the mass of the same metal);
- Piping systems are not subject to deposits of paraffins, salts and solid precipitation;
- Provides a low hydraulic resistance, due to smooth inner surface;
- Are not shielding material;

application of fiberglass casings will:

- Increase the period of accident-free operation of columns
- Eliminate or reduce the deposition of salts and paraffins;
- Reduce accident risk;
- Eliminate the need for corrosion inhibitors;
- Reduce the cost of maintenance;

Fiberglass casing successfully applied in ОАО «Surgutneftegas» on Yakutiya oilfields, OAO «Gazprom UGS-Stavropol» for mounting the control casing wells.

Lt - length of tube, D - outer diameter of the pipe, Dm - bell diameter, d - internal diameter of a conditional, t - thickness of pipe wall, L1, L2 - length of pipe zones, which enable the keys.

For more information see specifications: Fiberglass tubing and casings.

Pipes are manufactured with threaded connections. Integral fittings «nipple - clutch» threaded EUE 8rd API Long meets the requirements of API 5B, consistent with the thread size and thread profile of a triangular metal pump and compressor casing with a step of 8 threads per inch (GOST 632-80 and GOST 633-80) . The main difference is that the total length of the threads Fiberglass pipe is longer than a similar metal (photo thread).

Technical specifications of tubing and casings

1	Setting depth, m	up to 4000
2	Load factor	not less than 2.7
3	Temperature of the mediun carried, С	up to 110
4	Internal surface coefficient of roughness, mm	1524;10⁶
5	The length of pipe, mm	9120

GRP tubing and casings. Product line

Thread size, inches	Passage Internal Diameter		Nominal pressure
Thread size, inches	inch	mm	PSI	MPa
2 3/8	2	50	1000 to 4000	6.9 to 27.6
2 7/8	2.5	63	1000 to 4000	6.9 to 27.6
4 1/2	4	100	1000 to 2500	6.9 to 17.2
7	6	150	1000 to 2500	6.9 to 17.2
8 5/8	8	200	1000 to 2000	6.9 to 13.8

For more information see specifications: Fiberglass tubing and casings.

The pipes are mounted, down in the well on standard equipment in addition, to be supplied: sub, special torque wrench (to control the time of screwing threaded connections), lubrication of TF-15 (for mounting at sub-zero temperatures supplied special winter lubricant TFW-15 ).