BITART type 410 and modifications

Designation:

It designed for fitting bottomhole assembly for the purpose of preventing fluid or cement slurry backflow from annular space to string during cementing.

Equipping:

It provides leak-proof fit of cement plug and receiving cementing process end signal. Sleeve mounted float-type back valve Real Seal II™ provides reliable pressurization of tube side both in directional and horizontal wells.

Special design of valve unit as well as modern polymer materials allow sleeves standing continuous washover cycles with muds with high content of abrasive particles. The user of easy drilling polymer materials provides drilling-out using PDC bit without any damages to the bit.

Example of conventional designation at the time of order:

Sleeve with float back valve for OK YYY mm thread ZZZ where:
OK – casing;
XXX – type (modification) of device;
YYY – casing diameter;
ZZZ – type of thread.

Advantages (features):

  • Design is fully adapted for drilling-out with PDC bit;
  • Under development the valve unit was tested by back-pressure of 30MPa (300 atm.) and flushing fluid with high content of sand within 24 hours;
  • Design of valve unit provides ability of its use in well of any curvature;
  • Presence of additional option “Auto fill-up” allows tripping-in casing without loss of time for periodic stops for casing fill-up;
  • Presence of additional option “rotation retention mechanism Safe Lock™” allows excluding cement plug rotation during drilling-out, facilitate drilling-out process, and reduce drilling-out time.

Additional options:

  • “Auto fill-up” provides auto casing fill-up during tripping-in (option available for sleeves from 168,28mm (6 5/8) to 339,70mm (13 3/8);
  • “Rotation retention mechanism Safe Lock™” prevents cement plug rotation during drilling-out (option available for sleeves from 168,28mm (6 5/8) to 339,70mm (13 3/8);

* The use of sleeves with Safe Lock™ option is possible only with corresponding equipment also equipped with Safe Lock™ option.

Modifications of sleeves with float back valve BITART:

Additional options
Modifications   
BITART type 410
BITART type 411 BITART type 412 BITART type 413
Base version
+
+  + +
Auto fill-up  -  +  -  +
Rotation retention mechanism Safe Lock™
- - + +

Technical characteristics:

Sleeves with float-type back valve - BITART type 410 are produced for equipping casings in diameter 101,60mm (4 in) up to 339,70mm (13 3/8 in), can be produced with the following types of tool joints: buttress thread under GOST 632-80, buttress thread under API 5B and premium threads TMK FMC, TMK GF, TMK PF, TMK PF ET, VAM TOP.

Base variant of sleeve - BITART type 410. At customer’s option the sleeve - BITART type 410 can be equipped with additional options not included to the base set and come in the following modifications: BITART type 411, 412, 413.

Technical characteristics of sleeves with float back valve BITART type 410, 411, 412, 413:


Parameter Value
Casing OD, mm
101,60 114,30 146,05 168,28 177,80  244,48  323,85  339,70
Max. OD, mm
111,00 127,00 166,00 188,00 198,00 
 270,00  350,00  365,00
Min. ID after drilling-out, mm
88,00 100,00 130,00 149,00 159,00 
 226,00  304,00  318,00
Pump rate necessary for transferring back valve to operation condition, not less, I/sec 8,0
15,0
Withstanding by valve of over pressure in direct and oppasite direction, MPa** 30,0
Max. operating temperature, °C 130,0
Type of tool joint       OTTM, OTTG, Buttress thread
Shoe length in modification:

-OTTM tapered thread
-OTTG sealing thread
-Buttress thread
 

270,00
290,00
300,00
 

270,00
290,00
300,00
 

270,00
290,00
300,00
 

330,00
360,00
370,00
 

345,00
360,00
380,00
 

400,00
430,00
445,00


400,00
420,00
410,00


400,00
420,00
410,00
Weight, kg
8,0 10,0 20,0 25,0 29,0 38,0  50,0  60,0

*parameter for sleeves BITART type 411, 413