ПАТЕНТНЫЙ ПОИСК В РФ
НОВЫЕ ПАТЕНТЫ, ЗАЯВКИ НА ПАТЕНТ
БИБЛИОТЕКА ПАТЕНТОВ НА ИЗОБРЕТЕНИЯ

Downhole lubrication system


Классы МПК:E21B10/24 характеризующиеся элементами смазки
Автор(ы): Hall, David R. (Provo, UT, US)
Leany, Francis (Salem, UT, US)
Beazer, Michael (Provo, UT, US)
Webb, Casey (Spanish Fork, UT, US)
Патентообладатель(и): Schlumberger Technology Corporation (Houston, TX, US)
Приоритеты:
подача заявки
30.06.2009
публикация патента
27.03.2012

РЕФЕРАТ (Abstract)

What is claimed is a downhole lubrication system comprising a drill string component comprising an outer diameter and an inner bore. A reservoir may be disposed intermediate the outer diameter and inner bore. A piston may be disposed at least partially within the reservoir. At least one channel may extend from the reservoir to a bearing surface. As drilling fluid is passed through the inner bore, the piston may be pressurized, urging lubricant toward the bearing surface via the at least one channel.
Полный текст Патента US 8141662 + PDF


ФОРМУЛА ИЗОБРЕТЕНИЯ (CLAIMS)

What is claimed is:

1. A drill string component comprising: a cylindrical body having a first end, a first outer surface and a first inner surface defining a first inner bore; an insert disposed within said first inner bore, said insert having a second outer surface and a second inner surface defining a second inner bore; a reservoir formed between said first inner surface and said second outer surface; a fluid disposed within said reservoir; a first mating surface at said first end of said cylindrical body; a channel for communicating said fluid between said reservoir and said first mating surface; a piston within said reservoir, said piston being operable from a first position to a second position spaced from said first position, said piston adapted to urge said fluid through said channel; and means for urging said piston from first position to said second position.

2. The drill string component of claim 1, wherein said cylindrical body has a length and wherein a volume of said reservoir is determined by said length of said cylindrical body.

3. The drill string component of claim 1, wherein said insert is removable.

4. The drill string component of claim 3, further comprising a coupling mechanism disposed at said first end of said body.

5. The drill string component of claim 4, wherein the coupling mechanism is a threadform.

6. The drill string component of claim 3, wherein a volume of said reservoir is determined by a length of said insert.

7. The drill string component of claim 1, further comprising: a port in fluid communication between said channel and said first outer surface; and a plug within said port, said plug hindering movement of any fluid through said port.

8. The drill string component of claim 7, wherein said plug is a Zerk fitting.

9. The drill string component of claim 7, wherein said plug is a check valve.

10. The drill string component of claim 7, wherein said plug is an external covering.

11. The drill string component of claim 10, wherein the external covering is a threaded securement.

12. The drill string component of claim 1, wherein said first mating surface has an annular gap in fluid communication with said channel.

13. The drill string component of claim 12, wherein said annular gap is segmented.

14. The drill string component of claim 12, further comprising a bit disposed adjacent said first mating surface, wherein said bit includes a second mating surface disposed adjacent said first mating surface.

15. The drill string component of claim 14, wherein said annular gap is disposed on both said first mating surface and said second mating surfaces.

16. The drill string component of claim 14, wherein said bit includes a bearing surface and wherein the drill string component further comprises a plurality of channels extending from said reservoir to said bearing surface.

17. The drill string component of claim 1, further comprising a lubricant disposed within said reservoir, wherein said lubricant has an operating range of 25 degrees C. to 350 degrees C.

18. The drill string component of claim 1, wherein said reservoir has an axial length from 4 inches to 30 feet.

19. The drill string component of claim 1, wherein the reservoir has a capacity from 0.4 gallons to 45 gallons.

20. The drill string component of claim 1, wherein said means for urging said piston includes a spring.

21. The drill string component of claim 1, further comprising a second fluid, wherein said means for urging said piston includes a pressure of said second fluid.


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