INSERTABLE DEVICES FOR RETENTION SYSTEMS, STRUCTURES FOR ATTACHMENT AND METHODS OF USE

• US 20090205870A1
• Filed: 02/15/2008
• Published: 08/20/2009
• Est. Priority Date: 02/15/2008
• Status: Active Grant

• Current Assignee: Baker Hughes Holdings LLC (Baker Hughes Company)
• Original Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Inventors: Smith, Redd H.
• Granted Patent: US 7,735,582 B2
• Time in Patent Office: Days
• US Class Current: 175/57
• CPC Class Codes: E21B 10/60 characterised by conduits or nozzles for drilling fluids for roller bits E21B10/18; for percussion drill bits E21B10/38
• CPC Class Codes: E21B 10/62 characterised by parts, e.g. cutting elements, which are detachable or adjustable E21B10/64 takes precedence; for roller bits E21B10/20; for augers E21B10/44
• CPC Class Codes: F16B 21/186 external, i.e. with contracting action

Abstract

Insertable devices include a body and at least one substantially circumferential groove in an outer surface of the body. An aperture in a receiving device comprises at least one annular recess extending radially into a sidewall thereof. At least one resilient split ring fits partially into both the at least one substantially circumferential groove of the insertable device and the at least one annular recess in the aperture. Methods of inserting the insertable device into a receiving device and of removing the insertable device from a receiving device are also disclosed.

Claims

1. A nozzle insert for an earth-boring tool, comprising:

a body extending along a longitudinal axis and comprising a first longitudinal end and an opposing second longitudinal end; and

at least one substantially circumferential groove in an outer side surface of the body between the first longitudinal end and the second longitudinal end, the at least one substantially circumferential groove comprising;

a first surface sloping in the direction of the outer side surface and the first longitudinal end and forming an acute angle with the longitudinal axis; and

a second surface substantially transverse to the longitudinal axis.

2. The nozzle insert of claim 1, wherein the body is comprised of at least one of a ceramic, a metal, a metal alloy, a particle-matrix composite, a fiber-matrix composite, and a plastic.

3. The nozzle insert of claim 1, wherein the body is of circular configuration in cross section transverse to the longitudinal axis.

4. The nozzle insert of claim 1, wherein the body further comprises a bevel at an outer peripheral edge of the second longitudinal end.

5. The nozzle insert of claim 1, wherein the second surface of the circumferential groove is oriented either substantially perpendicular to the longitudinal axis or sloping in the direction of the first longitudinal end to form an acute angle with the longitudinal axis.

6. The nozzle insert of claim 1, further comprising at least one aperture extending longitudinally through the body and intersecting at least a portion of the first longitudinal end and at least a portion of the second longitudinal end.

7. The nozzle insert of claim 6, wherein the at least one aperture comprises at least one of a round, oval, rectangular and multi-sided cross section transverse to the longitudinal axis.

8. The nozzle insert of claim 6, wherein the at least one aperture comprises a sidewall and at least one annular recess extending radially into the sidewall and generally normal thereto.

9. The nozzle insert of claim 6, wherein the at least one aperture is configured and oriented to direct a fluid in a specific direction.

10. The nozzle insert of claim 6, wherein the at least one aperture comprises two or more apertures.

11. An earth-boring tool, comprising:

an aperture extending into an earth-boring tool, the aperture including a sidewall and at least one annular recess extending radially into the sidewall and generally normal thereto;

a nozzle insert positionable into the aperture and comprising;

a body comprising a first longitudinal end and an opposing second longitudinal end; and

at least one substantially circumferential groove in an outer side surface of the body between the first longitudinal end and the second longitudinal end, the at least one substantially circumferential groove comprising a first surface sloping in the direction of the outer side surface and the first longitudinal end and forming an acute angle with a longitudinal axis of the body, and a second surface substantially transverse to the longitudinal axis; and

at least one resilient split ring extending into both the at least one circumferential groove in the nozzle insert and the at least one annular recess in the aperture.

12. The nozzle insert of claim 11, wherein the body is comprised of at least one of a ceramic, a metal, a metal alloy, a particle-matrix composite, a fiber-matrix composite, and a plastic.

13. The earth-boring tool of claim 11, wherein the at least one resilient split ring comprises a chamfered inner edge facing a mouth of the aperture.

14. The earth-boring tool of claim 11, wherein the nozzle insert further comprises at least one aperture extending longitudinally through the body and intersecting at least a portion of the first longitudinal end and at least a portion of the second longitudinal end.

15. The earth-boring tool of claim 14, wherein the at least one aperture comprises a sidewall and at least one annular recess extending radially into the sidewall and generally normal thereto.

16. The earth-boring tool of claim 11, further comprising a depth control structure configured to limit the depth to which the nozzle insert is positionable within the aperture.

17. The earth-boring tool of claim 16, wherein the depth control structure comprises an annular shoulder.

18. The earth-boring tool of claim 17, wherein the annular shoulder comprises a region of the aperture in which a first, outer portion having a first cross-sectional dimension and a second, inner portion having a second, smaller cross-sectional dimension intersect.

19. The earth-boring tool of claim 11, further comprising at least one seal structure configured to inhibit the flow of a drilling fluid between the outer side surface of the nozzle insert and the sidewall of the aperture.

20. The earth-boring tool of claim 19, wherein the at least one seal structure is located in a position consisting of at least one of upstream and downstream from the at least one annular recess.

21. The earth-boring tool of claim 19, wherein the at least one seal structure comprises:

a plurality of annular recesses extending radially into the sidewall; and

a seal positioned in each of the plurality of annular recesses and compressed between the at least a second groove and the outer side surface of the nozzle insert.

22. The earth-boring tool of claim 11, comprising:

a plurality of annular recesses;

a plurality of substantially circumferential grooves; and

a plurality of resilient split rings;

wherein the number of annular recesses of the plurality, substantially circumferential grooves of the plurality, and resilient split rings of the plurality are equal.

23. A method of inserting a nozzle insert in an earth-boring tool, comprising:

positioning at least one resilient split ring at least partially into at least one annular recess in a sidewall of an aperture in an earth-boring tool;

positioning a first end of a nozzle insert into the aperture through the resilient split ring to expand the resilient split ring, the nozzle insert comprising at least one substantially circumferential groove in an outer side surface thereof, the at least one substantially circumferential groove including a first surface sloping in the direction of the outer side surface and the first end, and a second surface substantially transverse to the sidewall; and

aligning the at least one substantially circumferential groove of the nozzle insert with the at least one resilient split ring such that the expanded at least one resilient split ring at least partially contracts into the at least one substantially circumferential groove.

24. The method of claim 23, wherein positioning the at least one resilient split ring at least partially into the at least one annular recess comprises:

compressing an outer periphery of the at least one resilient split ring to an outer diametric dimension less than a cross-sectional dimension of the aperture;

sliding the at least one resilient split ring into the aperture; and

expanding the at least one resilient split ring into the at least one annular recess.

25. The method of claim 23, wherein positioning a nozzle insert into the aperture through the at least one resilient split ring to expand the at least one resilient split ring comprises:

forcing the nozzle insert through a center of the at least one resilient split ring; and

expanding the at least one resilient split ring about the outer side surface of the nozzle insert and into the at least one annular recess in the sidewall of the aperture.

26. The method of claim 23, further comprising:

positioning at least one seal into at least a second annular recess in the sidewall of the aperture; and

positioning the nozzle insert into the aperture so that the at least one seal is compressed between the at least a second annular recess and the outer side surface of the nozzle insert.

27. A method of removing a nozzle insert from an earth-boring tool, comprising:

advancing a nozzle insert into an aperture until each of one or more resilient split ring positioned at least partially in one or more annular recess in a sidewall of the aperture is exposed;

removing the one or more resilient split ring from the aperture; and

removing the nozzle insert from within the aperture.

28. The method of claim 27, wherein advancing the nozzle insert into the aperture until each of the one or more resilient split ring positioned at least partially in the one or more annular recess in a sidewall of the aperture is exposed comprises advancing the nozzle insert in the aperture until the nozzle insert engages a depth control structure.

29. The method of claim 27, wherein removing the one or more resilient split ring from the aperture comprises:

compressing the one or more resilient split ring so an outer periphery has an outer diametric dimension less than a cross-sectional dimension of the aperture; and

sliding the one or more resilient split ring out of the aperture.

30. The method of claim 27, further comprising removing at least one seal from at least a second annular recess in the sidewall of the aperture.

31. An apparatus, comprising:

a receiving device comprising an aperture extending therein, the aperture including a sidewall and at least one annular recess extending radially into the sidewall and generally normal thereto;

an insertable device positionable into the aperture and comprising;

a body comprising a first longitudinal end and an opposing second longitudinal end; and

at least one substantially circumferential groove in an outer side surface of the body between the first longitudinal end and the second longitudinal end, the at least one substantially circumferential groove comprising a first surface sloping in the direction of the outer side surface and the first longitudinal end and forming an acute angle with a longitudinal axis of the body, and a second surface substantially transverse to the longitudinal axis; and

at least one resilient split ring extending into both the at least one circumferential groove in the insertable device and the at least one annular recess in the aperture.