WO2024059646A4 - Joints for progressive cavity devices - Google Patents
Joints for progressive cavity devices Download PDFInfo
- Publication number
- WO2024059646A4 WO2024059646A4 PCT/US2023/074090 US2023074090W WO2024059646A4 WO 2024059646 A4 WO2024059646 A4 WO 2024059646A4 US 2023074090 W US2023074090 W US 2023074090W WO 2024059646 A4 WO2024059646 A4 WO 2024059646A4
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pivotable member
- spherical surface
- wear pads
- torque key
- wear
- 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.)
- Ceased
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pivots And Pivotal Connections (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
A progressive cavity device includes a stator, a rotor positioned within the stator, a driveshaft, and a joint coupling the driveshaft and the rotor. The joint includes a pivotable member fixably coupled to and engaged with an end of the driveshaft. The pivotable member has a central axis, a first end proximal the driveshaft, a second end distal the driveshaft, and a radially outer surface extending axially from the first end of the pivotable member to the second end of the pivotable member. The joint also includes a first wear pad mounted on the pivotable member. In addition, the joint includes a torque key disposed about the pivotable member and positioned radially adjacent the radially outer surface of the pivotable member. The torque key is rotationally locked to the rotor.
Claims
1 . A progressive cavity device, comprising: a stator; a rotor positioned within the stator; a driveshaft; and a joint coupling the driveshaft and the rotor, wherein the joint comprises: a pivotable member fixably coupled to and engaged with an end of the driveshaft; wherein the pivotable member has a central axis, a first end proximal the driveshaft, a second end distal the driveshaft, and a radially outer surface extending axially from the first end of the pivotable member to the second end of the pivotable member; a first wear pad mounted on the pivotable member; a torque key disposed about the pivotable member and positioned radially adjacent the radially outer surface of the pivotable member, wherein the torque key is rotationally locked to the rotor, wherein the pivotable member and the torque key are configured to rotate together, and wherein the pivotable member is configured to pivot relative to the torque key; and a second wear pad mounted to the torque key, wherein the second wear pad engages the first wear pad, and wherein engagement of the first wear pad and the second wear pad is configured to transfer torque between the pivotable member and the torque key.
2. The progressive cavity pump of claim 1 , wherein an outer surface of the first wear pad comprises a convex curvature and an outer surface of the second wear pad comprises a planar surface that engages the outer surface of the first wear pad.
3. The progressive cavity pump of claim 1 , wherein at least one of the first wear pad and the second wear pad comprises polycrystalline diamond (PCD).
4. The progressive cavity pump of claim 1 , wherein the radially outer surface of the pivotable member comprises a first convex spherical surface extending axially from
31
AMENDED SHEET (ARTICLE 19)
the first end, a second convex spherical surface extending axially from the second end, and a plurality of circumferentially-spaced pairs of inclined planar surfaces axially positioned between the first convex spherical surface and the second convex spherical surface; wherein a plurality of first wear pads including the first wear pad are disposed along each pair of inclined surfaces; wherein the torque key has a radially inner surface comprising a first planar surface and a second planar surface circumferentially adjacent the first planar surface, wherein the first planar surface of the torque key is radially opposed one of the pairs of inclined planar surfaces of the pivotable member and the second planar surface of the torque key is radially opposed to another one of the pairs of inclined planar surfaces; wherein a plurality of second wear pads including the second wear pad are disposed along each planar surface of the torque key; wherein each of the plurality of first wear pads engages one of the plurality of second wear pads.
5. The progressive cavity pump of claim 1 , wherein the joint further comprises: a first annular cap comprising: a recess; a concave spherical surface defined within the recess; and a plurality of third wear pads mounted to the concave spherical surface of the first annular cap; a second annular cap comprising: a recess; a concave spherical surface defined within the recess of the second annular cap; and a plurality of fourth wear pads mounted to the concave spherical surface of the second annular cap; wherein the pivotable member is axially positioned between the first annular cap and the second annular capwherein the radially outer surface of the pivotable member comprises a first convex spherical surface extending axially from the first end of the pivotable member and a second convex
AMENDED SHEET (ARTICLE 19)
spherical surface extending from the second end of the pivotable member; a plurality of fifth wear pads mounted on the first convex spherical surface of the pivotable member and a plurality of sixth wear pads mounted on the second convex spherical surface of the pivotable member; wherein the pivotable member is inserted into the recess of the first annular cap such that the plurality of fifth wear pads of the pivotable member engage with the plurality of third wear pads of the first annular cap; wherein the pivotable member is inserted into the recess of the second annular cap such that the plurality of sixth wear pads of the pivotable member engage with the plurality of fourth wear pads of the second annular cap.
6. The progressive cavity pump of claim 5, wherein the concave spherical surface of the first annular cap is offset from the first convex spherical surface of the pivotable member; wherein the concave spherical surface of the second annular cap is offset from the second convex spherical surface of the pivotable member; wherein the first planar surface of the toque key is offset from the corresponding pair of inclined surfaces of the pivotable member; and wherein the second planar surface of the toque key is offset from the corresponding pair of inclined surfaces of the pivotable member.
7. The progressive cavity pump of claim 5, wherein the plurality of third wear pads or the plurality of fifth wear pads comprise PCD, and wherein the plurality of fourth wear pads or the plurality of sixth wear pads comprise PCD.
8. The progressive cavity of pump of claim 5, wherein the annular cap comprises a circumferential outer surface and a recess extending radially into the circumferential outer surface, and wherein the torque key includes a projection seated within the recess of the annular cap such that the torque key is rotationally locked to the annular cap.
9. The progressive cavity pump of claim 1 , wherein the pivotable member includes a plurality of circumferentially-spaced holes extending axially therethrough or the
33
AMENDED SHEET (ARTICLE 19)
torque key includes a plurality of circumferentially-spaced holes extending axially therethrough.
10. The progressive cavity pump of claim 1 , wherein the pivotable member includes a lug and the first wear pad is mounted to the lug.
11. A joint for coupling a rotor to a driveshaft within a progressive cavity device, the rotor being rotatable within a stator, and the joint comprising: a pivotable member having a central axis, a first end, a second end opposite the first end, and a radially outer surface extending axially from the first end to the second end; wherein the pivotable member includes a throughbore extending axially from the first end and the second end, wherein the throughbore is configured to receive the driveshaft therein; wherein the radially outer surface of the pivotable member includes a first convex spherical surface extending axially from the first end and a second convex spherical surface extending axially from the second end; a plurality of first wear pads disposed along the radially outer surface of the pivotable member axially between the first convex spherical surface and the second convex spherical surface; a torque key having a first end, a second end opposite the first end of the torque key, and a radially inner surface extending axially from the first end of the torque key to the second end of the torque key, wherein the torque key is disposed about the pivotable member with the radially inner surface of the torque key radially adjacent the radially outer surface of the pivotable member; a plurality of second wear pads disposed along the radially inner surface of the torque key, wherein each second wear pad of the torque key engages a corresponding one of the first wear pads of the pivotable member with the radially inner surface of the torque key; wherein the torque key is configured to be rotationally locked to the rotor; wherein the pivotable member is configured to pivot omnidirectionally relative to the torque key.
AMENDED SHEET (ARTICLE 19)
12. The joint of claim 11 , wherein the radially outer surface of the pivotable member comprises a plurality of pairs of circumferentially-spaced inclined surfaces axially positioned between the first convex spherical surface and the second convex spherical surface; wherein the plurality of first wear pads are positioned along the pairs of inclined surfaces.
13. The joint of claim 12, wherein the radially inner surface of the torque key comprises a plurality of circumferentially-spaced planar surfaces, wherein one planar surface of torque key is radially opposed one of the plurality of pairs of circumferentially-spaced inclined surfaces of the pivotable member.
14. The joint of claim 11 , wherein at least one of the first wear pads or at least one of the second wear pads comprises polycrystalline diamond (PCD).
15. The joint of claim 14, wherein a concave spherical surface of each first wear pad engages a planar surface of the corresponding one of the second wear pads.
16. The joint of claim 11 , further comprising: a first annular cap comprising: a recess; a concave spherical surface defined within the recess; and a plurality of circumferentially-spaced third wear pads mounted to the concave spherical surface; a second annular cap comprising: a recess; a concave spherical surface defined within the recess of the second annular cap; and a plurality of circumferentially-spaced fourth wear pads mounted to the concave spherical surface of the second annular cap; wherein the pivotable member comprises: a plurality of circumferentially-spaced fifth wear pads mounted on the first convex spherical surface of the pivotable member;
AMENDED SHEET (ARTICLE 19)
a plurality of circumferentially-spaced sixth wear pads mounted on the second convex spherical surface of the pivotable member; wherein the pivotable member is inserted into the recess of the first annular member such that the plurality of third wear pads engage the plurality of fifth wear pads; wherein the pivotable member is inserted into the recess of the second annular member such that the plurality of fourth wear pads engage the plurality of sixth wear pads.
17. The joint of claim 16, wherein the plurality of third wear pads or the plurality of fifth wear pads comprise PCD.
18. The joint of claim 16, wherein the first annular cap comprises a circumferential outer surface and a recess extending radially into the circumferential outer surface, and wherein the torque key includes a projection seated within the recess on the annular cap such that the torque key is rotationally locked the annular cap.
19. The joint of claim 18, wherein a convex curved surface of each of the fifth wear pads of the pivotable member engages a planar surface of one of the third wear pads of the torque key.
20. The joint of claim 16, wherein the first concave spherical surface of the first annular member is offset from the first convex spherical surface of the pivotable member; wherein the second concave spherical surface of the second annular member is offset from the second convex spherical surface of the pivotable member; wherein the radially outer surface of the pivotable member is offset from the radially inner surface of the torque key.
AMENDED SHEET (ARTICLE 19)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202263406571P | 2022-09-14 | 2022-09-14 | |
| US63/406,571 | 2022-09-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2024059646A1 WO2024059646A1 (en) | 2024-03-21 |
| WO2024059646A4 true WO2024059646A4 (en) | 2024-05-10 |
Family
ID=90275815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2023/074090 Ceased WO2024059646A1 (en) | 2022-09-14 | 2023-09-13 | Joints for progressive cavity devices |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2024059646A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4191032A (en) * | 1978-01-27 | 1980-03-04 | August Daniel A | Rotary energy-transmitting mechanism |
| US9915106B2 (en) * | 2013-03-15 | 2018-03-13 | Smith International, Inc. | U-joint for a downhole motor drive shaft |
| US9404527B2 (en) * | 2013-04-09 | 2016-08-02 | National Oilwell Varco, L.P | Drive shaft assembly for a downhole motor |
| CA2928055C (en) * | 2015-04-24 | 2019-12-31 | Turbo Drill Industries, Inc. | Offset shaft bearing assembly |
| US11815139B2 (en) * | 2016-09-30 | 2023-11-14 | Abaco Drilling Technologies Llc | PDM transmission with sliding contact between convex shaft pins and concave bearings surfaces |
| US10612316B2 (en) * | 2017-07-27 | 2020-04-07 | Turbo Drill Industries, Inc. | Articulated universal joint with backlash reduction |
| WO2020198000A1 (en) * | 2019-03-22 | 2020-10-01 | Baker Hughes, A Ge Company, Llc | Self-aligning bearing assembly for downhole tools |
-
2023
- 2023-09-13 WO PCT/US2023/074090 patent/WO2024059646A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024059646A1 (en) | 2024-03-21 |
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