GB2410067A - Freewheel with wedge-shaped portions and depressions - Google Patents

Freewheel with wedge-shaped portions and depressions Download PDF

Info

Publication number
GB2410067A
GB2410067A GB0400892A GB0400892A GB2410067A GB 2410067 A GB2410067 A GB 2410067A GB 0400892 A GB0400892 A GB 0400892A GB 0400892 A GB0400892 A GB 0400892A GB 2410067 A GB2410067 A GB 2410067A
Authority
GB
United Kingdom
Prior art keywords
race
freewheel
locking element
depressions
wedge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0400892A
Other versions
GB2410067B (en
GB0400892D0 (en
Inventor
George Swietlik
Christopher David Down
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilot Drilling Control Ltd
Original Assignee
Pilot Drilling Control Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pilot Drilling Control Ltd filed Critical Pilot Drilling Control Ltd
Priority to GB0400892A priority Critical patent/GB2410067B/en
Publication of GB0400892D0 publication Critical patent/GB0400892D0/en
Priority to GB0706492A priority patent/GB2434605B/en
Priority to GB0806379A priority patent/GB2445321B/en
Priority to GB0427717A priority patent/GB2410043B/en
Priority to GB0718805A priority patent/GB2440456B/en
Priority to US11/033,576 priority patent/US7377337B2/en
Publication of GB2410067A publication Critical patent/GB2410067A/en
Application granted granted Critical
Publication of GB2410067B publication Critical patent/GB2410067B/en
Priority to US12/079,550 priority patent/US20080179100A1/en
Priority to US12/284,423 priority patent/US20090020337A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/006—Mechanical motion converting means, e.g. reduction gearings
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/18—Freewheels or freewheel clutches with non-hinged detent

Abstract

A freewheel having a first race 4 formed on a driving member, a second race 6 formed on a driven member and a locking element 12 interposed between the first and second races 4, 6. One of the races 4 has a wedge-shaped portion 8 upon which a locking element moves, and the other race 6 has a depression 14 formed in a surface thereof, the depression 14 being shaped to receive at least a portion of the locking element 12 when the locking element 12 is in an engaged position. The driven member is able to rotate freely when the locking element 12 is in a disengaged position, and the driving and driven members are engaged when the locking element 12 is in an engaged position in which the locking element 12 is jammed into the depression 14 by the wedge-shaped portion 8.

Description

kgO] (t on flus 24 1 0067
FREEWHEEL
Technical Field of the Invention
The invention relates to a freewheel, and in particular to a drill string freewheel that can transmit a high torque without slipping in a downhole drilling operation.
Background to the Invention
A freewheel device links a driving member, that is, a member providing a driving force or torque, to a driven member. A freewheel device is designed so that, when the rotational speed of the driving member is greater than the rotational speed of the driven member, the freewheel locks the driving and driven members together so the torque driving the driving member is transmitted to the driven member. When the rotational speed of the driving member is less than the rotational speed of the driven member, the freewheel allows the driven member to rotate freely of the driving member.
Requirements of a freewheel device are that the freewheel locks quickly when a sufficient torque is applied, and that the freewheel does not slip when subjected to very high torques.
In some types of freewheel devices, the locking and unlocking action is achieved by jamming one or more rollers or ball bearings between the driving and driven members, and by releasing them respectively. The rollers or ball bearings are located between a pair of races, with one race being formed on the driving member and the other race being formed on the driven member. One of the races is designed so that, when a sufficient torque is applied to the driving member, sloped faces on the race bear against the rollers or ball bearings, so that they are jammed between the sloped faces and the race formed on the driven member. Torque is therefore transmitted through the rollers or ball bearings from the driving member to the driven member. When the driving force or torque reduces, the rollers or ball bearings are released, allowing the driven member to rotate freely of the driving member.
However, if the driving force or torque is particularly large, for example in a downhole turbine, the rollers or ball bearings may slip from their jammed positions, causing the freewheel to unlock. Although the freewheel will re-lock when the rollers or ball bearings again jam between the sloped faces and the race formed on the driven member, the slipping of the freewheel may result in excessive wear or damage to the freewheel or to the driving or driven machinery.
There is therefore a need for a freewheel device that locks quickly when a driving torque is applied, and which is less susceptible to the locking elements slipping at high torques.
Summarv of the Invention According to a first aspect of the present invention, there is provided a freewheel, composing: a first race formed on a driving member; a second race formed on a driven member; a locking element interposed between said first and second races; wherein one of said races has a wedge-shaped portion upon which a locking element moves from a disengaged position in which the first race is disengaged from the second race and an engaged position in which the locking element locks the first and second races together, and the other of said races has a depression formed in a surface thereof, the depression being shaped to receive at least a portion of the locking element when the locking element is in the engaged position. The driven member is able to rotate freely relative to the driving member when the locking element is in a disengaged position, and the driving and driven members are interconnected to transmit drive when the locking element is in an engaged position and the locking element is jammed into the depression by the wedge-shaped portion.
Preferably, the other of said races has a plurality of depressions formed in the surface thereof.
Preferably, the one of said races has a plurality of wedge-shaped portions formed on the surface thereof, and the freewheel further comprises a plurality of locking elements interposed between the first and second races.
The locking elements may compose ball bearings or rollers.
Preferably, where the locking elements are ball bearings, the wedgeshaped portion or portions are formed in the end face of the first race, and the depression or depressions are formed in the end face of the second race.
Preferably, the one or more depressions are grooves that extend in a generally circumferential direction relative to the axis of rotation of the driven member.
Preferably, the one or more wedge-shaped portions are curved in a generally circumferential direction relative to the axis of rotation of the driving member.
Alternatively when the locking elements are ball bearings, or when the locking elements are rollers, the depression may be a recess or a groove extending in a direction parallel to the axis of rotation of the driving and driven members.
Alternatively, the depression may comprise a hole with a radial axis, or a hole with an axis offset from a radial direction.
In a preferred embodiment, the wedge-shaped portion or portions are formed on the first race, and the depression or depressions are formed on the surface of the second 1 5 race.
Brief Description of the Drawinas
The invention will now be described with reference to the following drawings, in which: Figure 1 is a perspective view of a freewheel according to a first embodiment of the invention with a portion of the inner and outer races removed to show the locking elements in disengaged positions.
Figure 2 is a cross-section through the freewheel of Figure 1, showing the locking elements in disengaged positions.
Figure 3 is a perspective view of a freewheel according to first embodiment of the invention with a portion of the inner and outer races removed to show the locking elements in engaged positions.
Figure 4 is a cross-section through the freewheel of Figure 3, showing the locking elements in engaged positions.
Figure 5 is a perspective view of a freewheel according to a second embodiment of the invention with a portion of the inner and outer races removed to show the locking elements in disengaged positions.
Figure 6 is a cross-section through the freewheel of Figure 5, showing the locking elements in disengaged positions.
Figure 7 is a perspective view of a freewheel according to a third embodiment of the present invention with a portion of the driven race removed to show the locking elements in disengaged positions.
Figure 8 is a simplified diagram of a freewheel according to the third embodiment of the present invention showing a locking element in a disengaged position between the driving and driven members.
Figure 9 shows a cross-section of the freewheel according to the third embodiment of the present invention showing the locking elements in engaged positions.
Figure 10 is a perspective view of a freewheel according to the third embodiment of the present invention with a portion of the driving race removed to show the locking elements in engaged positions.
Figure 11 is a simplified diagram of a freewheel according to the third embodiment of the present invention showing a locking element in an engaged position between the driving and driven members.
Detailed Description of the Preferred Embodiments
In Figures 1 to 6, like elements are represented by the same reference numerals.
Figures 1 and 3 are perspective views of a freewheel according to a first embodiment of the invention, in which the freewheel is unlocked and locked respectively.
The freewheel 2 comprises a first circular race 4, which in this illustrated embodiment Is the inner race, around which Is located a second circular race 6. The first race 4 and second race 6 have a common axis of rotation. The first race 4 is formed on a driving member (not shown) and the second race 6 is formed on a driven member (also not shown) . In Figures 1 and 3, a portion of the first race 4 has been cut away to show the structure of the second race 6, and a portion of the second race 6 has been cut away to show the structure of the first race 4.
A number of wedge-shaped portions 8 are located on the outer surface of the first race 4. These wedge-shaped portions 8 define, with the inner surface of the outer race 6, a number of tapering spaces 10 between the first race 4 and second race 6. The tapering spaces taper from a narrow end 9 to a wide end 11.
Interposed between the first race 4 and second race 6, and, when the freewheel is unlocked, located in the wide end 11 of each tapering space 10, is a locking element 12. In the preferred embodiment, each of the locking elements 12 are of equal size, and have a diameter such that, when the locking element 12 is located in the wide end 11, the locking element 12 is not in contact with both the first race 4 and second race 6.
In this illustrated embodiment, each of the locking elements 12 is a roller. In the alternative embodiment illustrated in Figures 5 and 6, the locking elements 12 are ball bearings.
In accordance with the invention, one or more depressions 14 are formed in the inner surface of the second race 6. These depressions 14 are shaped to receive at least a portion of a locking element 12. Therefore, where the locking elements 12 are rollers, the depressions 14 may be grooves in the inner surface of the second race 6, which extend in a direction that is parallel to the axis of rotation of the first race 4 and second race 6 (as shown in Figures 1 and 3). Where the locking elements 12 are ball bearings, the depressions 14 may be circular recesses in the inner surface of the second race 6. Alternatively, the depressions 14 may be holes drilled or cut into the second race 6, with the holes being rectangular in plan view so that they can receive a portion of a roller, or circular so that they can receive a portion of a ball bearing (as shown in Figures 5 and 6).
The depressions 14 are preferably equally spaced around the inner surface of the second race 6, with each wedge-shaped portion 8 on the first race 4 having a corresponding depression 14 on the second race 6.
When the rotational speed of the driven member is greater than the rotational speed of the driving member, the freewheel 2 is unlocked, avowing the driven member to rotate freely of the driving member. Figures 1 and 2 show a freewheel according to the invention with the locking elements In unlocked or disengaged positions at the wide ends 11 of respective tapering spaces 10. In these figures, arrow 16 indicates the direction that the second race 6 is rotating. The first race 4 may be stationary, or may be rotating in the same direction as, but slower than, the second race 6.
As the locking elements 12 are located in the wide ends 11, and the locking elements 12 have a diameter such that they are not able to be in contact with both the first race 4 and second race 6 whilst in the wide ends 11, the second race 6 is able to rotate freely with respect to the first race 4. Therefore, the locking elements 12 are in disengaged positions.
However, when the speed of rotation of the first race 4 increases to exceed that of the second race 6 (i.e. when the driving torque of the driving member becomes greater than the output torque of the driven member), the wedge-shaped portions 8 act on the locking elements 12 so that they are pushed towards the narrow ends 9 of respective tapering spaces 10 and are forced into contact with the inner surface of the second race 6. As the first race 4 and locking elements 12 rotate relative to the second race 6, the locking elements 12 will, upon reaching depressions 14 in the inner surface of the second race 6, be pushed into the depressions 14 by the wedge-shaped portions 8.
The locking elements 12 are now held in engaged positions, and the first race 4 and second race 6 are locked with the first race 4 and second race 6 rotating at the same speed. Therefore, when the freewheel 2 is locked, torque is transmitted through the rollers from the driving member to the driven member. The locked position of the freewheel can be seen in Figures 3 and 4. Here, arrow 17 indicates the direction in which both races are rotating, and also indicates the direction in which the driving torque acts.
When the driving torque reduces and the speed of rotation of the first race 4 decreases relative to the speed of rotation of the second race 6, the wedge-shaped portions 8 will no longer jam the locking elements 12 into the depressions 14. Therefore, each locking element 12 is released from the respective depression 14 and is accommodated with some play in the wide ends 11 of the respective tapering space 10, allowing the second race 6 to rotate freely of the first race 4. The freewheel 2 is now back in the unlocked position as shown in Figures 1 and 2.
Although the invention has been described and illustrated as comprising a plurality of wedge-shaped portions, a plurality of locking elements and a plurality of depressions, it will be appreciated that a freewheel according to the present invention will function even with a single wedgeshaped portion, a single locking element and a single depression.
Although depressions are formed in the surface of the second race 6, it is still possible for the locking elements to become jammed between the wedge-shaped portions and the inner surface of the second race, as in a conventional freewheel, without the locking elements being 'engaged' in the depressions. In this case, the freewheel will partially lock up, but may still slip. Therefore, in accordance with one embodiment of the invention, the number of locking elements and number of depressions are not equal. In particular, the number of depressions is increased relative to the number of locking elements, and so that the locking elements will become jammed into the depressions immediately or with minimal relative slip between the races.
It will also be appreciated that the invention is applicable to freewheel devices where the first race formed on the driving member is the outer race, and the second race formed on the driving member is the inner race. In this case, the wedge-shaped portions are located on the outer race (i. e. on the first race) and the depressions are formed in the outer surface of the inner race. When a sufficient driving torque is applied to the first, outer race, the wedge-shaped portions act on the locking elements so that they are pushed against the outer surface of the second race. When the locking elements reach depressions in the outer surface of the inner race, the wedge- shaped portions will push the locking elements into the depressions, thus locking the first and second races, and transmitting the driving torque to the driven member.
It will also be appreciated that the present invention is applicable to freewheels in which the or each locking element Is located in the face of the driving member and moves in an axial direction to lock against the opposing face of the driven member. A freewheel according to this embodiment of the invention is shown In Figures 7 to 11.
The freewheel 20 comprises a first race 22 formed in the end face of a driving member adjacent to a second race 24 formed in the end face of a driven member. The first race 22 and second race 24 have a common axis of rotation. In Figure 7, a portion of the second race 24 has been cut away to show the structure of the first race 22.
The first race 22 comprises a number of contoured wedge-shaped portions 26 set in the face of the driving member. These contoured wedge-shaped portions 26 define, with the end face of the driven member, a number of tapering spaces 28 between the first race 22 and second race 24. The tapering spaces 28 taper from a shallow end 30 to a deep end 32. This configuration can be more clearly seen in Figures 8 and 10.
Interposed between the first race 22 and second race 24, and, when the freewheel is unlocked, located in the deep end 32 of each tapering space 28, is a locking element 34. Each locking element 34 can move up and down its respective wedge- shaped portion 26. In a preferred embodiment, each of the locking elements 34 are of equal size, and have a diameter such that, when the locking element 34 is located in the deep end 32, the locking element 34 is not in contact with the second race 24.
In this embodiment, the locking elements 34 are ball bearings.
In accordance with the invention, one or more depressions 36 are formed in the face of the second race 24. These depressions 36 are shaped to receive at least a portion of a locking element 34. Therefore, as the locking elements 34 are ball bearings, the depressions 36 are tapered grooves in the face of the second race 24.
Figure 9 shows the shape of the contoured wedge-shaped portions 26 and grooves 36.
Here, the wedge-shaped portions 26 (indicated by the solid lines) are formed in the face of the driving member, and extend in a generally circumferential direction around the axis of rotation of the driving member.
In a preferred embodiment of the invention, the wedge-shaped portions 26 are disposed so that, when the locking element 34 is moving into the engaged position, the locking element is moved slightly radially outwards. This has the effect of providing a more positive locking action, as the locking elements 34 are assisted into the engaged position by the rotational motion of the driving member.
When the rotational speed of the driven member is greater than the rotational speed of the driving member, i.e. when w1 > w2, as indicated in Figure 8, the freewheel 20 is unlocked, allowing the driven member to rotate freely of the driving member.
Specifically, as the locking elements 34 are located in the deep ends 32, and the locking elements 34 have a diameter such that they are not able to be in contact with both the first race 22 and second race 24 whilst in the deep ends 32, the second race 24 is able to rotate freely with respect to the first race 22. Therefore, the locking elements 34 are in disengaged positions.
However, when the rotational speed of the driving member becomes greater than the rotational speed of the driven member, i.e. when w2 > w1, as indicated in Figure 11, the wedge-shaped portions 26 act on the locking elements 34 so that they are pushed towards the shallow ends 30 of their respective tapering spaces 28 and are forced into contact with the face of the second race 24. As the first race 22 and locking elements 34 rotate relative to the second race 24, the locking elements 34 will, upon reaching the depressions 36 in the face of the second race 24, be pushed into the depressions 36 by the wedge-shaped portions 26. The locking elements 34 are now held in engaged positions, as shown in Figures 9, 10 and 11, and the first race 22 and second race 24 are locked with the first race 22 and second race 24 rotating at the same speed.
Therefore, when the freewheel 20 is locked, torque is transmitted through the locking elements from the driving member to the driven member.
When the driving torque reduces and the speed of rotation of the first race 22 decreases relative to the speed of rotation of the second race 24, the wedge-shaped portions 26 will no longer jam the locking elements 34 into the depressions 36.
Therefore, each locking element 34 is released from its respective depression 36 and is accommodated with some play in the deep ends 32 of the respective tapering space 28, allowing the second race 24 to rotate freely of the first race 22. The freewheel 20 is now back in the unlocked position as shown in Figures 7 and 8.
There is therefore provided a freewheel device that locks quickly when a driving torque is applied, and which is less susceptible to slipping at high torques.

Claims (15)

  1. Claims 1. A freewheel, comprising: a first race formed on a driving
    member; a second race formed on a driven member; a locking element interposed between said first and second races; wherein one of said races has a wedge-shaped portion upon which a locking element moves from a disengaged position in which the first race is disengaged from the second race and an engaged position in which the locking element locks the first and second races together, and the other of said races has a depression formed in a surface thereof, the depression being shaped to receive at least a portion of the locking element when the locking element is in the engaged position.
  2. 2. A freewheel as claimed in claim 1, wherein said other of said races has a plurality of depressions formed in the surface thereof.
  3. 3. A freewheel as claimed in claim 2, wherein said one of said races has a plurality of wedge-shaped portions, and the freewheel further comprises a plurality of locking elements interposed between the first and second races.
  4. 4. A freewheel as claimed in any preceding claim, wherein a locking element is a ball bearing.
  5. 5. A freewheel as claimed in any preceding claim, wherein the wedgeshaped portion or portions are formed in the end face of the first race, and the depression or depressions are formed in the end face of the second race.
  6. 6. A freewheel as claimed in claim 5, wherein the one or more depressions are grooves that extend in a generally circumferential direction relative to the axis of rotation of the driven member.
  7. 7. A freewheel as claimed in claim 5 or 6, wherein the one or more wedge shaped portions are curved in a generally circumferential direction relative to the axis of rotation of the driving member.
  8. 8. A freewheel as claimed in one of claims 1 to 3, wherein a locking element is a roller.
  9. 9. A freewheel as claimed in one of claims 1 to 4 or 8, wherein a depression is a hole.
  10. 10. A freewheel as claimed in one of claims 1 to 4 or 8, wherein a depression is a recess.
  11. 11. A freewheel as claimed in one of claims 1 to 4 or 8, wherein the depression is a groove that extends in a direction parallel to the axis of rotation of the driving and driven members.
  12. 12. A freewheel as claimed in one of claims 1 to 4 or 8 to 11, wherein the wedge-shaped portion or portions are formed on the first race, and the depression or depressions are formed in the surface of the second race.
  13. 13. A freewheel as claimed in one of claims 3 to 12, wherein the number of depressions is greater than the number of locking elements.
  14. 14. A freewheel as claimed in any preceding claim, wherein the driven member is able to rotate freely when the locking element is in a disengaged position, and the driving and driven members are engaged when the locking element is in an engaged position in which the locking element is jammed into the depression by the wedge shaped portion.
  15. 15. A freewheel substantially as described herein, with reference to and as shown in Figures 1 to 4, Figures 5 and 6 or Figures 7 to 11 of the accompanying drawings.
GB0400892A 2004-01-15 2004-01-15 Freewheel Expired - Lifetime GB2410067B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB0400892A GB2410067B (en) 2004-01-15 2004-01-15 Freewheel
GB0718805A GB2440456B (en) 2004-01-15 2004-12-17 Downhole drilling tool
GB0806379A GB2445321B (en) 2004-01-15 2004-12-17 Downhole drilling tool
GB0427717A GB2410043B (en) 2004-01-15 2004-12-17 Downhole drilling tool
GB0706492A GB2434605B (en) 2004-01-15 2004-12-17 Downhole drilling tool
US11/033,576 US7377337B2 (en) 2004-01-15 2005-01-12 Downhole drilling tool
US12/079,550 US20080179100A1 (en) 2004-01-15 2008-03-27 Downhole drilling tool
US12/284,423 US20090020337A1 (en) 2004-01-15 2008-09-22 Downhole drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0400892A GB2410067B (en) 2004-01-15 2004-01-15 Freewheel

Publications (3)

Publication Number Publication Date
GB0400892D0 GB0400892D0 (en) 2004-02-18
GB2410067A true GB2410067A (en) 2005-07-20
GB2410067B GB2410067B (en) 2007-12-27

Family

ID=31726237

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0400892A Expired - Lifetime GB2410067B (en) 2004-01-15 2004-01-15 Freewheel
GB0427717A Expired - Fee Related GB2410043B (en) 2004-01-15 2004-12-17 Downhole drilling tool

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0427717A Expired - Fee Related GB2410043B (en) 2004-01-15 2004-12-17 Downhole drilling tool

Country Status (2)

Country Link
US (3) US7377337B2 (en)
GB (2) GB2410067B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7703550B2 (en) * 2004-02-06 2010-04-27 Smith International, Inc. Down hole motor with locking mechanism
GB0614989D0 (en) * 2006-07-28 2006-09-06 Aker Kvaerner Subsea Ltd Hydraulic valves with integral seals
DE102006054435B4 (en) 2006-11-16 2010-03-18 Tracto-Technik Gmbh & Co. Kg Method for introducing a geothermal probe into the ground and a device
JP5040555B2 (en) * 2007-09-26 2012-10-03 株式会社ジェイテクト One-way clutch
NO344886B1 (en) 2012-02-28 2020-06-15 Smart Stabilizer Systems Ltd TORQUE CONTROL DEVICE FOR A DOWNHOLE DRILLING ASSEMBLY.
US9376865B2 (en) 2012-05-25 2016-06-28 Halliburton Energy Services, Inc. Rotational locking mechanisms for drilling motors and powertrains
CN102765319A (en) * 2012-08-06 2012-11-07 陈培良 Automobile booster
CA2886179C (en) * 2012-12-19 2016-07-05 Halliburton Energy Services, Inc. Downhole torque limiting assembly for drill string
US9462436B2 (en) * 2012-12-20 2016-10-04 Intel Corporation Preventing dropped calls through behavior prediction
CA2888530C (en) 2012-12-21 2017-10-10 Halliburton Energy Services, Inc. Anti-reverse mechanism for mud motor
EP2923025B1 (en) 2013-02-20 2017-09-27 Halliburton Energy Services, Inc. Downhole rotational lock mechanism
US9689229B2 (en) * 2013-04-22 2017-06-27 Cameron International Corporation Rotating mandrel casing hangers
US9909385B2 (en) 2013-04-22 2018-03-06 Cameron International Corporation Rotating wellhead hanger assemblies
MX365524B (en) 2013-08-23 2019-06-06 Halliburton Energy Services Inc Anti-stall mechanism.
US10024103B2 (en) 2015-02-04 2018-07-17 Center Rock Inc. Down-the-hole drill hammer having a roller ramp clutch
US10060188B2 (en) 2015-04-16 2018-08-28 Halliburton Energy Services, Inc. Driveshaft catch assembly
CN106351591A (en) * 2015-11-05 2017-01-25 衡阳中地装备探矿工程机械有限公司 Drill rod clamping device
CN109826880A (en) * 2019-02-22 2019-05-31 中国科学院声学研究所东海研究站 A kind of overdrive clutch formula is self-locking-unlocking mechanism
CN112443272B (en) * 2020-12-04 2023-11-28 四川深远石油钻井工具股份有限公司 Underground drilling tool with self-locking and unlocking functions
GB202103282D0 (en) 2021-03-10 2021-04-21 Rockatek Ltd Downhole assembly to mitigate high frequency torsional oscillation, and oscillation mitigation tool for use in a downhole assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB532740A (en) * 1939-08-19 1941-01-30 Perry And Company Ltd Improvements in internally-expanding brakes for cycles
US3432016A (en) * 1965-09-08 1969-03-11 Omega Brandt & Freres Sa Louis Magnetic roller clutch
US4901836A (en) * 1986-09-10 1990-02-20 S & L Maskin Ab Settable slip clutch
JPH08177888A (en) * 1994-10-27 1996-07-12 Zero Eng:Kk Centrifugal one way clutch
JPH08291782A (en) * 1995-04-20 1996-11-05 Nippondenso Co Ltd One way clutch
WO2002035111A1 (en) * 2000-10-27 2002-05-02 Rb Design, S.R.O. Roller-claw free-wheel clutch

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1270570A (en) * 1918-01-21 1918-06-25 Henry E Van Ness Coasting-sprocket.
US2167019A (en) * 1937-11-01 1939-07-25 Smith Corp A O Automatic clutch for drilling apparatus
US2915156A (en) * 1955-09-06 1959-12-01 Thurman W Horn Power transmitting drive embodying friction clutch
US2978047A (en) * 1957-12-03 1961-04-04 Vaan Walter H De Collapsible drill bit assembly and method of drilling
US3486597A (en) * 1967-11-02 1969-12-30 William Charles Carlton Moulded one-way clutch
US3767019A (en) * 1971-07-21 1973-10-23 F Wingler Over running clutch
DE2214840C3 (en) * 1972-03-27 1981-03-26 Stieber Antriebselemente GmbH, 68775 Ketsch One-way clutch with sprags
US4187918A (en) * 1978-06-12 1980-02-12 Wallace Clark Down-hole earth drilling motor capable of free circulation
US4232751A (en) * 1978-11-02 1980-11-11 Smith International, Inc. In-hole motor drill with bit clutch
US4632193A (en) * 1979-07-06 1986-12-30 Smith International, Inc. In-hole motor with bit clutch and circulation sub
US4386666A (en) * 1979-08-20 1983-06-07 Smith International, Inc. In-hole motor drill with locking bit clutch
US4276944A (en) * 1979-08-20 1981-07-07 Smith International, Inc. In-hole motor with bit clutch
US4295535A (en) * 1979-08-20 1981-10-20 Smith International, Inc. In-hole motor drill with locking bit clutch
US4427079A (en) * 1981-11-18 1984-01-24 Walter Bruno H Intermittently rotatable down hole drilling tool
CA2071611C (en) * 1992-06-18 2000-09-12 Wenzel Downhole Tools Ltd. Bearing assembly for a downhole motor
US5558193A (en) * 1994-08-01 1996-09-24 General Electric Company Ball-type auger ratchet mechanism for agitator/auger systems
US5555946A (en) 1995-04-24 1996-09-17 Klatt; Darrell Method and tool for use in commmencing the drilling of a deviated well
US5947214A (en) * 1997-03-21 1999-09-07 Baker Hughes Incorporated BIT torque limiting device
CA2202319C (en) * 1997-04-10 2001-05-29 Jim Macphail Roller stabilizer
US6148979A (en) * 1998-01-20 2000-11-21 Brigham Young University Compliant overrunning clutch with centrifugal throw-out
US6073741A (en) * 1998-10-06 2000-06-13 Liu; Kuo-Lung One-way roller clutch
CA2256069A1 (en) * 1998-12-15 2000-06-15 Ian Gillis Free-wheeling clutch for a downhole drilling assembly
US6644452B2 (en) * 2001-04-25 2003-11-11 Maclean-Fogg Company Wheel hub with clutch
EP1644608B1 (en) * 2003-06-27 2007-11-14 The Charles Machine Works Inc Coupling for dual member pipe
TWM243587U (en) * 2003-10-31 2004-09-11 Benq Corp One-way clutch
US7703550B2 (en) * 2004-02-06 2010-04-27 Smith International, Inc. Down hole motor with locking mechanism
US7735581B2 (en) * 2007-04-30 2010-06-15 Smith International, Inc. Locking clutch for downhole motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB532740A (en) * 1939-08-19 1941-01-30 Perry And Company Ltd Improvements in internally-expanding brakes for cycles
US3432016A (en) * 1965-09-08 1969-03-11 Omega Brandt & Freres Sa Louis Magnetic roller clutch
US4901836A (en) * 1986-09-10 1990-02-20 S & L Maskin Ab Settable slip clutch
JPH08177888A (en) * 1994-10-27 1996-07-12 Zero Eng:Kk Centrifugal one way clutch
JPH08291782A (en) * 1995-04-20 1996-11-05 Nippondenso Co Ltd One way clutch
WO2002035111A1 (en) * 2000-10-27 2002-05-02 Rb Design, S.R.O. Roller-claw free-wheel clutch

Also Published As

Publication number Publication date
US7377337B2 (en) 2008-05-27
US20080179100A1 (en) 2008-07-31
GB0427717D0 (en) 2005-01-19
GB2410067B (en) 2007-12-27
US20090020337A1 (en) 2009-01-22
US20060151216A1 (en) 2006-07-13
GB2410043A (en) 2005-07-20
GB0400892D0 (en) 2004-02-18
GB2410043B (en) 2008-06-25

Similar Documents

Publication Publication Date Title
GB2410067A (en) Freewheel with wedge-shaped portions and depressions
US8042670B2 (en) Selectable one-way clutch with radial integrated forward/reverse rockers
EP1944520B1 (en) Selectable one-way clutch with symmetrical struts
US7607526B2 (en) Anti-reverse input clutch
SU1560063A3 (en) Safety clutch
US4033437A (en) Synchronizer with rocking key disengagement
WO2013150982A1 (en) Rotation transmitting device
WO2010004880A1 (en) Reduction gear and variable valve timing device using same
JPH0650358A (en) Torque limitter equipped with automatic reset function
JP2010038362A (en) Reduction gear
EP1138969B1 (en) Rotation transmitting device incorporating one-way clutch therein
US4531620A (en) Freewheel ramp/roller clutch with positive lock-out
JP2631983B2 (en) Torque transmission mechanism
US8448766B2 (en) Bi-directional clutch with staggered roller elements
US5383542A (en) Overrunning clutch
US6889808B2 (en) Positive locking overrunning clutch mechanism
US6745882B2 (en) Locking clutch
US6446776B1 (en) Spiral-type coupling
US6814198B2 (en) Multi-directional coupling
US20080099292A1 (en) Overrunning bi-directional clutch with sprag elements
GB2434605A (en) Downhole freewheel
GB2445321A (en) Downhole drilling tool with freewheel
GB2440456A (en) Downhole drilling tool with freewheel device
JP2006342876A (en) Reverse input shutting-off clutch
CN112178072B (en) Overrunning clutch

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20230810 AND 20230816

PE20 Patent expired after termination of 20 years

Expiry date: 20240114