CA1231866A - Sucker rod centralizer - Google Patents
Sucker rod centralizerInfo
- Publication number
- CA1231866A CA1231866A CA000522073A CA522073A CA1231866A CA 1231866 A CA1231866 A CA 1231866A CA 000522073 A CA000522073 A CA 000522073A CA 522073 A CA522073 A CA 522073A CA 1231866 A CA1231866 A CA 1231866A
- Authority
- CA
- Canada
- Prior art keywords
- slot
- guide
- roller
- sucker rod
- section
- 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.)
- Expired
Links
- 239000003129 oil well Substances 0.000 claims abstract description 4
- 241000168133 Euides Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
Abstract
ABSTRACT
An oil well sucker rod guide consisting of an elongated body, a number of radial slots through the body, each slot being disposed at equiangular spaced positions, each slot having a roller therein rotatably supported upon an axle transverse to the slot such that the roller projects outside the periphery of the body from only one end of the slot.
An oil well sucker rod guide consisting of an elongated body, a number of radial slots through the body, each slot being disposed at equiangular spaced positions, each slot having a roller therein rotatably supported upon an axle transverse to the slot such that the roller projects outside the periphery of the body from only one end of the slot.
Description
~:31~366 This invention relates to an oil well sucker rod guide which is generally one of a number introduced at spaced intervals along a string of sucker rods for the purpose of holding the rods away from contact with the well tubing to reduce sliding friction and to prevent wear of the sucker rods and the well tubing.
The sucker rod guide is particularly useful in oil wells wherein the well tubing has bends or deviations in it.
Antifriction sucker rod guides are known in the prior art, United States patent number 2,198,720 which issued on April 30, 1940 to O Edgecomb, et al, being typical of the known type. The patent to Edgecomb, et al discloses a euide having a number of rollers along its length, the rollers being through the body of the guide with each roller extending from diametrically opposed sides of the body. The prior art guides function reasonably well, particularly when used in straight parts of the well tubing, however, where deviations or bends occur in the well tubing, the tubing is of a slightly oval cross-section due to the bending and the rollers scrub against both sides of the well tubing. The rollers, therefore, wear down and, also, grooves are worn in the well tubing. This occurs because the rollers are each only of a slightly smaller diameter than the inner diameter of the well tubing and, at bends, where the well tubing ls of oval cross-section the length of the minor axis of the oval is less than the diameter of each roller.
The sucker rod guide of this invention overcomes the shortcomings of the prior art guides by having rollers or wheels along the guide body which are of a much smaller diameter than the inner diameter of the well tubing, each roller extending from only one side of the guide body. When an oval cross-section piece of well tubing is encountered, no one roller, of the guide itself engages diametrically opposed regions of the tubing and, hence, the guide can negotiate an oval piece of well tubing without excessively wearing the rollers and without wearing any grooves within the well tubing.
The sucker rod guide of this invention more specifically consists of an elongated body, a number of slots through the body with each slot being disposed at a position which is radially spaced from the reminder of the slots, each slot having at least one roller therein rotatably supported upon a shaft and projecting at one end of the slot outside the periphery of the body.
The sucker rod guide of this invention is, therefore, less prone to wear
The sucker rod guide is particularly useful in oil wells wherein the well tubing has bends or deviations in it.
Antifriction sucker rod guides are known in the prior art, United States patent number 2,198,720 which issued on April 30, 1940 to O Edgecomb, et al, being typical of the known type. The patent to Edgecomb, et al discloses a euide having a number of rollers along its length, the rollers being through the body of the guide with each roller extending from diametrically opposed sides of the body. The prior art guides function reasonably well, particularly when used in straight parts of the well tubing, however, where deviations or bends occur in the well tubing, the tubing is of a slightly oval cross-section due to the bending and the rollers scrub against both sides of the well tubing. The rollers, therefore, wear down and, also, grooves are worn in the well tubing. This occurs because the rollers are each only of a slightly smaller diameter than the inner diameter of the well tubing and, at bends, where the well tubing ls of oval cross-section the length of the minor axis of the oval is less than the diameter of each roller.
The sucker rod guide of this invention overcomes the shortcomings of the prior art guides by having rollers or wheels along the guide body which are of a much smaller diameter than the inner diameter of the well tubing, each roller extending from only one side of the guide body. When an oval cross-section piece of well tubing is encountered, no one roller, of the guide itself engages diametrically opposed regions of the tubing and, hence, the guide can negotiate an oval piece of well tubing without excessively wearing the rollers and without wearing any grooves within the well tubing.
The sucker rod guide of this invention more specifically consists of an elongated body, a number of slots through the body with each slot being disposed at a position which is radially spaced from the reminder of the slots, each slot having at least one roller therein rotatably supported upon a shaft and projecting at one end of the slot outside the periphery of the body.
The sucker rod guide of this invention is, therefore, less prone to wear
2 1 8~
`-- than the prior art ~uidss, does not form grooves within the well tubing, and well maintenance on the sucker row assembly is only requlred at much longer intervals of time than was required wlth the prlor art sucker rod guide system.
The invention will now be described with reference to the accompanying drawings in which:
Figure 1 is a front elevational view of the sucker rod guide of this invention;
Figure 2 is an end elevational view of Figure l;
Figure 3 is a front elevational view of one of the rollers shown on Figure 1; and Figure 4 is an exploded view of a roller and its mounting.
Referring specifically to Figures 1 and 2, the sucker rod guide consl~ts of an elongated body 1, preferably of metal, the body bein8 cylindrical and having screwed tapered threaded bores 3 and 5 to connect to the ends of lengths of sucker rod. The body 1 has slots 7 extending through the body, preferably as shown on a dlametric plane. The slots 7 sre spaced equidistantly along the body and are al80 equiangularly dlsposed through the body.
In the embodiment of the lnventlon shown ln the drawings, each slot is made of a length whicb will accommodatQ two rollers 9 and 11 slthough any number of rollers could be utilized. Each roller is rotatably mounted within the slot so that one of the pair of rollers extQnds out of one end of the slot and the other of tha pair of rollers extends out of the other and of the slot. Each of the rollers, as specifically shown in Figure 3, consists of a disc 13 having a central bore 15 and a rounded adge 17.
The roller is mounted wlthin the cyllndrical body as shown in Figure 4, upon a short axle 19 which slldes into bore 21, wlthln the body, and is held in place by a set screw 23 which screws into a threaded end 25 within bore 21. The set screw can be tightened against the axle 19 by a shaped recess 27 ~0 whlch will accommodate an Allen key or a Phlllips river or a slmilar type of tool. A small bore 29 extends from the blind end of bore 21 to provide an alr rellef hole to permit solid seatlng of the axle 19.
If required, a bearing can be accommodated wlthln bore 15 which can be either an oil impregnated sleeve bearing or an antifrlctlon besring such as a needle roller bearing or ball bearlng.
_ 2 1 2 3 ~g~
It will thus be seen that a sucker rod guide has been disclosed which will easily accommodste bends in well tubing and the distortion of the well tubing caused by such bends, without damaging both itself and the well tubing.
The invention is limited only by the claims which follow.
`-- than the prior art ~uidss, does not form grooves within the well tubing, and well maintenance on the sucker row assembly is only requlred at much longer intervals of time than was required wlth the prlor art sucker rod guide system.
The invention will now be described with reference to the accompanying drawings in which:
Figure 1 is a front elevational view of the sucker rod guide of this invention;
Figure 2 is an end elevational view of Figure l;
Figure 3 is a front elevational view of one of the rollers shown on Figure 1; and Figure 4 is an exploded view of a roller and its mounting.
Referring specifically to Figures 1 and 2, the sucker rod guide consl~ts of an elongated body 1, preferably of metal, the body bein8 cylindrical and having screwed tapered threaded bores 3 and 5 to connect to the ends of lengths of sucker rod. The body 1 has slots 7 extending through the body, preferably as shown on a dlametric plane. The slots 7 sre spaced equidistantly along the body and are al80 equiangularly dlsposed through the body.
In the embodiment of the lnventlon shown ln the drawings, each slot is made of a length whicb will accommodatQ two rollers 9 and 11 slthough any number of rollers could be utilized. Each roller is rotatably mounted within the slot so that one of the pair of rollers extQnds out of one end of the slot and the other of tha pair of rollers extends out of the other and of the slot. Each of the rollers, as specifically shown in Figure 3, consists of a disc 13 having a central bore 15 and a rounded adge 17.
The roller is mounted wlthin the cyllndrical body as shown in Figure 4, upon a short axle 19 which slldes into bore 21, wlthln the body, and is held in place by a set screw 23 which screws into a threaded end 25 within bore 21. The set screw can be tightened against the axle 19 by a shaped recess 27 ~0 whlch will accommodate an Allen key or a Phlllips river or a slmilar type of tool. A small bore 29 extends from the blind end of bore 21 to provide an alr rellef hole to permit solid seatlng of the axle 19.
If required, a bearing can be accommodated wlthln bore 15 which can be either an oil impregnated sleeve bearing or an antifrlctlon besring such as a needle roller bearing or ball bearlng.
_ 2 1 2 3 ~g~
It will thus be seen that a sucker rod guide has been disclosed which will easily accommodste bends in well tubing and the distortion of the well tubing caused by such bends, without damaging both itself and the well tubing.
The invention is limited only by the claims which follow.
Claims (7)
IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An oil well sucker rod guide consisting of an elongated body, a number of radial slots through the body, each slot being disposed at equiangular spaced positions, each slot having a roller therein rotatably supported upon an axle transverse to the slot such that the roller projects outside the periphery of the body from only one end of the slot.
2. The guide of claim 1, wherein each slot has a pair of rollers therein, one of the pair projecting from one end of the slot and the other of the pair projecting from the other end of the slot.
3. The guide of claim 1, wherein the body is of circular cross-section.
4. The guide of claim 1, wherein each slot is rectangular in cross section.
5. The guide of claim 1, wherein each roller is rectangular in cross-section.
6. The guide of claim 1, wherein each roller is of rectangular cross section having a rounded circumference.
7. The guide of claim 1 wherein the axle is held in place within the body by a set screw within a threaded end of the bore which accommodates the axle the other end of the bore having a blind end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000522073A CA1231866A (en) | 1986-11-03 | 1986-11-03 | Sucker rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000522073A CA1231866A (en) | 1986-11-03 | 1986-11-03 | Sucker rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1231866A true CA1231866A (en) | 1988-01-26 |
Family
ID=4134285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000522073A Expired CA1231866A (en) | 1986-11-03 | 1986-11-03 | Sucker rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1231866A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2620767A1 (en) * | 1987-09-21 | 1989-03-24 | Intevep Sa | DEVICE FOR CENTERING TUBULAR STRUCTURES IN AN OIL WELL PIPING |
| EP0621437A1 (en) * | 1993-04-21 | 1994-10-26 | ABB Reaktor GmbH | Propulsion hose for a pig |
| WO2006016155A1 (en) * | 2004-08-12 | 2006-02-16 | Wireline Engineering Limited | Downhole device |
| CN102720441A (en) * | 2012-07-06 | 2012-10-10 | 常熟市石油固井工具有限公司 | Accessory used for guiding sucker rod |
| GB2562323A (en) * | 2017-10-03 | 2018-11-14 | G A R & D Ltd | Roller device |
-
1986
- 1986-11-03 CA CA000522073A patent/CA1231866A/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2620767A1 (en) * | 1987-09-21 | 1989-03-24 | Intevep Sa | DEVICE FOR CENTERING TUBULAR STRUCTURES IN AN OIL WELL PIPING |
| NL8802264A (en) * | 1987-09-21 | 1989-04-17 | Intevep Sa | CENTERING DEVICE FOR A POLISHED BAR AND / OR A CUP VACUUM CONTAINING UNDER THE SURFACE. |
| EP0621437A1 (en) * | 1993-04-21 | 1994-10-26 | ABB Reaktor GmbH | Propulsion hose for a pig |
| WO2006016155A1 (en) * | 2004-08-12 | 2006-02-16 | Wireline Engineering Limited | Downhole device |
| AU2005271065B2 (en) * | 2004-08-12 | 2010-07-08 | Impact Selector Limited | Downhole device |
| US7866384B2 (en) | 2004-08-12 | 2011-01-11 | Wireline Engineering Limited | Downhole device |
| CN102720441A (en) * | 2012-07-06 | 2012-10-10 | 常熟市石油固井工具有限公司 | Accessory used for guiding sucker rod |
| GB2562323A (en) * | 2017-10-03 | 2018-11-14 | G A R & D Ltd | Roller device |
| WO2019069073A1 (en) * | 2017-10-03 | 2019-04-11 | G A R & D Limited | Downhole device |
| GB2562323B (en) * | 2017-10-03 | 2019-09-18 | G A R & D Ltd | Roller device |
| US11274513B2 (en) | 2017-10-03 | 2022-03-15 | G A R&D Limited | Downhole device for use in a well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |