Concentric tubing
Concentric tubing
Concentric tubing represents polymer-armored flexible multilayer piping, intended for production of gas and gas condensate, liquid carry-over, transportation of reservoir and waste water to the borehole bottom.
The structure of tubing may vary depending on the operation conditions and necessity to perform specified functions. The internal diameter may vary from 32 to 62 mm considering the operation conditions. Operating pressure is up to 100 atm.
One of the promising ways of application of the concentric tubing is lowering into the well, which is possible without killing of the well. This technology was used for the first time in November, 2013. For lowering operations special-purpose hoisting equipment is employed.
Concentric tubing is supplied with upper and lower tips. If required, for example for sensors connection, signal conductors may be added.
Patent protection of the design on the territory of Russia is ensured.
Concentric tubing represents polymer-armored flexible multilayer piping.
Please fill in the order form.
Order form template can be found in the section “Docs” at the bottom of the page.
Please send the filled order form to info@energomash-hps.com .
Our customer service manager will contact you within 24 hours.
Well concentric tubing have the following structure:
- Reinforcing layer – structural component comprising several layers of metal tape wrapped over in the opposite directions which enhances resistance of the flexible pipe to internal and external pressure and to mechanical collapse load.
- Armor layer – structural component comprising two lays of metal wire, wrapped over in the opposite directions which is intended for taking up axial tensile loads.
- Anti-wear layer – non-metal layer in the form of tape wrapping intended for reduction of wear between the layers.
- Electrical layer – structural component comprising segments with electric power and signal conductors.
- Outer sheath – polymeric layer intended for protection of reinforcing elements from corrosion, abrasive and mechanical damage and for retaining the elements in the position predetermined by shaping. The outer sheath is made by continuous extrusion from the compositions based on the low pressure polyethylene.
| Inner diameter | 32-62 mm |
| Operating temperature range | -2˚С to +60˚С |
| Operating pressure | Up to 100 atm |
| Maximum end-to-end dimension (for diameter 32 mm) | 5200 m |
| Handled media | oil, gas, water, abrasives, aggressive media |
Concentric tubing as compared to metal piping has the following advantages:
-
possibility of manufacture of larger end-to-end dimensions and consequently reduction of the number of joints;
-
absence of butt joints , which mitigates the risk of formation of hydrates;
-
the weight is less than the weight of a steel pipe and, respectively, the load on the wellhead fittings is less;
-
lowering into the well is possible without killing the well ;
-
service life is longer than that of steel piping;
-
absence of all types of corrosion, so there is no need in cathodic protection and thus minimum maintenance;
-
polymer –armored tubing withstands contact with water and is resistant to the majority of aggressive media;
-
flow capacity of the polyethylene piping does not deteriorate in the course of time;
-
polymer –armored tubing is not toxic.
Use of concentric tubing provides for application of the advanced technologies, among them lowering into the well without killing of the well. All this enables:
-
to exclude the risk of “losing” the well after its killing;
-
to reduce significantly the time and costs of lowering of the pipe ;
-
to rule out the drop in the well yield after lowering of the flexible pipe , since in case of the well killing recovery of the well yield may require a long period of time.
|
Description |
TG 32/60-10/10-75 |
TG 49/73-10/10-75 |
TG 62/89-10/10-75 |
|
Inner diameter (mm) |
32 | 49 | 62 |
|
Outer diameter (mm) |
60 | 73 | 89 |
|
Bending radius in storage (m) |
0,45 | 0,55 | 0,65 |
|
Bending radius in operation (m) |
0,45 | 0,55 | 0,65 |
|
Length on coiling reel (m) |
5200 | 3400 | 2100 |
| Weight | |||
|
Pipe weight (kg/m) |
2,8 | 3,3 | 4,6 |
| Pressure | |||
|
Internal pressure (аtm) |
100 | 100 | 100 |
|
Internal testing pressure (аtm) |
150 | 150 | 150 |
|
External pressure (аtm) |
80 | 80 | 80 |
| External testing pressure (аtm)) | 120 | 120 | 120 |
| Flow characteristics | |||
|
Inner surface roughness (mcm) |
1,5 | 1,5 | 1,5 |
| Temperature characteristics | |||
|
Min. operating temperature(°C) |
-2 | -2 | -2 |
| Max. operating temperature(°C) | +60 | +60 | +60 |
| Mechanical characteristics | |||
|
Maximum tension load (kN) |
75 | 75 | 75 |
| Inner diameter | 32-62 mm |
| Operating temperature range | -2˚С to +60˚С |
| Operating pressure | Up to 100 atm |
| Maximum end-to-end dimension (for diameter 32 mm) | 5200 m |
| Handled media | oil, gas, water, abrasives, aggressive media |
Concentric tubing as compared to metal piping has the following advantages:
-
possibility of manufacture of larger end-to-end dimensions and consequently reduction of the number of joints;
-
absence of butt joints , which mitigates the risk of formation of hydrates;
-
the weight is less than the weight of a steel pipe and, respectively, the load on the wellhead fittings is less;
-
lowering into the well is possible without killing the well ;
-
service life is longer than that of steel piping;
-
absence of all types of corrosion, so there is no need in cathodic protection and thus minimum maintenance;
-
polymer –armored tubing withstands contact with water and is resistant to the majority of aggressive media;
-
flow capacity of the polyethylene piping does not deteriorate in the course of time;
-
polymer –armored tubing is not toxic.
Use of concentric tubing provides for application of the advanced technologies, among them lowering into the well without killing of the well. All this enables:
-
to exclude the risk of “losing” the well after its killing;
-
to reduce significantly the time and costs of lowering of the pipe ;
-
to rule out the drop in the well yield after lowering of the flexible pipe , since in case of the well killing recovery of the well yield may require a long period of time.
|
Description |
TG 32/60-10/10-75 |
TG 49/73-10/10-75 |
TG 62/89-10/10-75 |
|
Inner diameter (mm) |
32 | 49 | 62 |
|
Outer diameter (mm) |
60 | 73 | 89 |
|
Bending radius in storage (m) |
0,45 | 0,55 | 0,65 |
|
Bending radius in operation (m) |
0,45 | 0,55 | 0,65 |
|
Length on coiling reel (m) |
5200 | 3400 | 2100 |
| Weight | |||
|
Pipe weight (kg/m) |
2,8 | 3,3 | 4,6 |
| Pressure | |||
|
Internal pressure (аtm) |
100 | 100 | 100 |
|
Internal testing pressure (аtm) |
150 | 150 | 150 |
|
External pressure (аtm) |
80 | 80 | 80 |
| External testing pressure (аtm)) | 120 | 120 | 120 |
| Flow characteristics | |||
|
Inner surface roughness (mcm) |
1,5 | 1,5 | 1,5 |
| Temperature characteristics | |||
|
Min. operating temperature(°C) |
-2 | -2 | -2 |
| Max. operating temperature(°C) | +60 | +60 | +60 |
| Mechanical characteristics | |||
|
Maximum tension load (kN) |
75 | 75 | 75 |
