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US20090183885A1 - Rod guide with improved stator - Google Patents

Rod guide with improved stator Download PDF

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Publication number
US20090183885A1
US20090183885A1 US12/009,892 US989208A US2009183885A1 US 20090183885 A1 US20090183885 A1 US 20090183885A1 US 989208 A US989208 A US 989208A US 2009183885 A1 US2009183885 A1 US 2009183885A1
Authority
US
United States
Prior art keywords
stator sleeve
stator
sleeve
sleeve body
catch member
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.)
Abandoned
Application number
US12/009,892
Other languages
English (en)
Inventor
Matthew S. Davison
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.)
Robbins and Myers Energy Systems LP
Original Assignee
Robbins and Myers Energy Systems LP
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 Robbins and Myers Energy Systems LP filed Critical Robbins and Myers Energy Systems LP
Priority to US12/009,892 priority Critical patent/US20090183885A1/en
Assigned to ROBBINS & MYERS ENERGY SYSTEMS L.P. reassignment ROBBINS & MYERS ENERGY SYSTEMS L.P. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DAVISON, MATTHEW S.
Priority to PCT/US2009/000359 priority patent/WO2009094139A1/en
Priority to ARP090100190A priority patent/AR070226A1/es
Publication of US20090183885A1 publication Critical patent/US20090183885A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • E21B17/1064—Pipes or rods with a relatively rotating sleeve
    • 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
    • E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods

Definitions

  • the present invention relates to a rod guide of a type suitable for guiding a sucker rod within production tubing of an oil or gas well. More particularly, the invention relates to a rod guide for guiding a rotary sucker rod which powers a progressive cavity (PC) pump in a well.
  • PC progressive cavity
  • rod guides have been devised for guiding a sucker within production tubing. Many rod guides are intended for use with a reciprocating sucker rod, and other rod guides are primarily intended for use with a rotating sucker rod. Some guides have utility for either a reciprocating rod or a rotating rod, although design considerations generally dictate that a sucker rod guide be primarily intended for one application.
  • rod guides for PC pumps wear excessively when subjected to the upwardly moving fluid and sand within the production tubing.
  • the cost of replacing PC rod guides for these applications thus represents a significant cost to the well operator.
  • Other rod guides have low erodeable wear volume, i.e., the volume of the guide radially exterior of the rod coupling is minimal, and wear of that excess material reduces the purpose of the guide.
  • Other rod guides have poor flow characteristics, meaning that the flow channels around the guide result in a high pressure loss, thereby increasing the power required to pump the fluids to the surface.
  • Other types of rod guides allow sand or other particles to become trapped or imbedded between components of the guide, thereby substantially contributing to premature wear of the guide.
  • rod guides designed for PC pumps include a rotor sleeve secured to the rod string and a stator sleeve positioned about the rotor sleeve.
  • the stator sleeve conventionally has an elongate slot, which is spread apart to position the stator sleeve on the rotor sleeve.
  • the slot facilitates installation, but also allows sand and other debris from the well to get trapped between the rotor sleeve and the stator sleeve.
  • the rod guide rotor sleeve with a conventional slot may have problems when used in high temperature downhole applications, since the stator sleeve may tend to open when exposed to high temperature.
  • a rod guide for positioning on a rotating sucker rod which powers a downhole progressive cavity pump for pumping downhole fluids to the surface includes a rotor sleeve secured to the rod, and a stator sleeve positioned about the rotor sleeve.
  • the stator sleeve has a sleeve body with a generally circular configuration with opposing circumferential ends spreadable to position the stator sleeve about the rotor sleeve.
  • the stator sleeve has a plurality of ribs extending outward from the sleeve body for passing fluid between the stator sleeve body and tubing and circumferentially between the two or more ribs.
  • One circumferential end of the stator has a catch member, and an opposing circumferential end of the stator sleeve has a receiving cavity for receiving at least a portion of the catch member.
  • the circumferential ends of the stator sleeve are connected via the catch member and the receiving cavity.
  • the rotor sleeve is secured to the sucker rod, and the stator sleeve positioned about the rotor sleeve.
  • the stator sleeve has a sleeve body with a generally circular configuration with opposing circumferential ends separable to position the stator sleeve about the rotor sleeve, and has a plurality of ribs extending outward from the sleeve body.
  • the method includes providing one circumferential end of the stator sleeve with a catch member and an opposing circumferential end of the stator sleeve with a receiving cavity for receiving at least a portion of the catch member.
  • the circumferential ends of the stator sleeve are connected about the rotor sleeve by mating the catch member and the receiving cavity.
  • a significant advantage of the present invention is that by connecting the ends of the stator sleeve, little or no sand or other debris is allowed to pass radially through the stator sleeve and in the cavities between the rotor sleeve and the stator sleeve.
  • FIG. 1 is a side view of a rod guide stator sleeve according to the present invention.
  • FIG. 2 is a cross sectional view of the rod guide stator sleeve shown in FIG. 1 .
  • FIG. 3 is an enlarged view of the ends of the stator sleeve as shown in FIG. 2 .
  • FIG. 4 in enlarged view of an alternate embodiment of the circumferential ends of the stator sleeve.
  • FIG. 5 illustrates the rod guide stator sleeve shown in FIG. 1 positioned on a rod guide rotor and the circumferential ends of the stator sleeve connected.
  • FIG. 1 illustrates one embodiment of a stator sleeve 40 according to the present invention.
  • a rod guide as disclosed herein is particularly suitable for use in a rotating rod string 12 which powers a progressive cavity (PC) pump 14 , as shown in FIG. 5 .
  • the rod string 12 rotates to drive the pump 14 , and fluid is pumped upward through a tubular string 16 and past the rod guides to the surface.
  • the rod guide itself includes a rotor sleeve 20 which is secured to a rod 12 , and a stator sleeve 40 , which is positioned about the rotor sleeve.
  • the stator sleeve effectively guides the rod string within the tubular string to prevent excessive wear on the tubular string, and the stator sleeve either does not rotate or rotates intermittently with a rotor, often at a much lower rpm.
  • the rod guide is shown with a sleeve shaped rotor sleeve 20 which is molded or otherwise secured to the rotating rod string 12 .
  • the rod guide is positioned within the interior of the production tubing string 16 , and the rotating rod powers a progressive cavity pump 14 schematically shown at the lower end of the rod string 12 in FIG. 1 .
  • the rotor sleeve 20 is fairly conventional for a PC application, and comprises a substantially sleeve shaped body 22 and upper stop member 24 with a lower stop surface 26 , a lower stop member 28 with an upper stop surface 30 .
  • the exterior surface 32 of the stator sleeve may have a generally cylindrical configuration, thereby prolonging the life of the rod guide as the rod string and the rotor sleeve rotate within the stator sleeve.
  • a side view of the rotor sleeve 40 illustrates a generally sleeve shaped body 42 and a plurality of ribs 60 .
  • three or more ribs 60 extend radially outward from the sleeve shaped body 42 .
  • the outer surfaces 62 of ribs 60 are thus the surfaces which engage the interior of the production tubing string during use of the rod guide. Fluid thus flows between the sleeve shaped body 42 and the interior of the production tubing, and circumferentially between the ribs 60 .
  • the upper and lower ends of each rib 60 may include a tapered section 64 which taper inward to the extremity of the stator sleeve to substantially coincide with the exterior surface of the sleeve shaped body 42 .
  • FIG. 2 illustrates in further detail of the stator sleeve as shown in FIG. 1 , with one circumferential end 44 of the stator body 42 including a catch member 52 , and an opposing circumferential end 46 of the body 42 including a receiving cavity 54 for receiving at least a portion of the catch member 52 .
  • the circumferential ends of the stator sleeve may be brought into mating engagement, with catch member 52 entering the receiving cavity 54 effectively connecting the ends of the body 42 together.
  • This feature not only desirably maintains the stator sleeve on the rotor sleeve during use, it also substantially reduces if not eliminates migration of sand and other particles radially inward between the rotor sleeve and the stator sleeve.
  • FIG. 3 depicts an enlarged view of the circumferential ends of the stator sleeve when brought together.
  • Throat 56 for the receiving cavity 54 has a cavity entrance portion 64 which is wider than the neck portion 66 , thereby tending to properly position the catch member 52 within the receiving cavity. Since the radial width of the catch member 52 is greater than the radial width of the neck portion 66 , the catch member 52 once latched is designed to stay in the closed position.
  • Surface 68 on the catch member is thus a planar surface which is substantially parallel to the axis of the rotor, and engages a similar planar surface 70 on the sleeve body adjacent the receiving cavity, thereby retaining the components connected together and maintaining the stator sleeve connected at its circumferential ends.
  • FIG. 4 depicts an alternate embodiment of the circumferential ends 44 , 46 of the rotor sleeve.
  • the catch member 72 on the end 44 of the stator sleeve has a substantially ball-shaped configuration
  • the receiving cavity 74 in the opposing end 56 of the stator sleeve similarly has a generally circular cross section.
  • a throat 78 is narrower than the diameter of the ball member 72 , and accordingly is spread slightly apart when the ball is forced into the receiving cavity.
  • This design applies a substantial holding force to retain the two circumferential ends of the stator sleeve together, but does allow the catch member to be removed from the cavity by applying a circumferential spreading force, thereby allowing the stator sleeve to be removed from the rotor sleeve, then reinstalled on the same rotor sleeve or another rotor sleeve.
  • a significant feature of the present invention is that the catch member and the receiving cavity are provided axially along substantially the length of the stator sleeve.
  • the catch member 52 and the cavity 54 as shown in FIG. 4 are each substantially a vertical column, and similarly the catch member 72 and the receiving cavity 76 are vertical columns.
  • this engagement substantially minimizes the likelihood of sand and other debris moving radially between the stator sleeve and the rotor sleeve, which was a problem with prior art rod guides which had an open slot when the stator sleeve was positioned on the rotor sleeve. While sand or other debris may pass between the ends of the stator sleeve and the respective stop surfaces 26 , 28 , as shown in FIG.

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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
US12/009,892 2008-01-23 2008-01-23 Rod guide with improved stator Abandoned US20090183885A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/009,892 US20090183885A1 (en) 2008-01-23 2008-01-23 Rod guide with improved stator
PCT/US2009/000359 WO2009094139A1 (en) 2008-01-23 2009-01-21 Rod guide with improved stator
ARP090100190A AR070226A1 (es) 2008-01-23 2009-01-22 Guia de varilla con estator mejorado

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/009,892 US20090183885A1 (en) 2008-01-23 2008-01-23 Rod guide with improved stator

Publications (1)

Publication Number Publication Date
US20090183885A1 true US20090183885A1 (en) 2009-07-23

Family

ID=40875530

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/009,892 Abandoned US20090183885A1 (en) 2008-01-23 2008-01-23 Rod guide with improved stator

Country Status (3)

Country Link
US (1) US20090183885A1 (es)
AR (1) AR070226A1 (es)
WO (1) WO2009094139A1 (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016046516A1 (en) * 2014-09-24 2016-03-31 Centek Ltd Centralizer and associated devices
US9664001B2 (en) 2014-09-24 2017-05-30 Centek Limited Centralizer and associated devices
CN109184589A (zh) * 2018-11-02 2019-01-11 大庆市天德忠石油科技有限公司 一种复合式抽油杆扶正器
WO2025045792A1 (en) * 2023-08-25 2025-03-06 Tenaris Connections B.V. Sucker rod guide

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608873A (en) * 1924-12-13 1926-11-30 Mexia Planing Mill Company Sucker-rod guide
US5191938A (en) * 1991-12-16 1993-03-09 Sable Donald E Rod guide assembly and method of its installation on a rod shank
US5358041A (en) * 1993-05-26 1994-10-25 Enterra Patco Oil Field Products Rod guide
US5647713A (en) * 1996-05-22 1997-07-15 Trw Inc. Plastic panel fastener and method of forming the same
US5740662A (en) * 1993-02-15 1998-04-21 Kverneland Underhaug A/S Bale wrapper apparatus
US5755284A (en) * 1993-05-06 1998-05-26 Flow Control Equipment, Inc. Extended wear rod guide and method
US5941312A (en) * 1997-09-15 1999-08-24 Rg Industries Ltd. Method of fabricating a rod guide, and a rod guide/sucker rod combination
US20060000602A1 (en) * 2004-07-01 2006-01-05 Abdo Gary E Field-installable rod guide
US20090166036A1 (en) * 2007-12-27 2009-07-02 Davison Matthew S Progressive cavity pump rod guide

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6957704B2 (en) * 2003-05-14 2005-10-25 Halliburton Energy Services Inc. Limit clamp for use with casing attachments

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608873A (en) * 1924-12-13 1926-11-30 Mexia Planing Mill Company Sucker-rod guide
US5191938A (en) * 1991-12-16 1993-03-09 Sable Donald E Rod guide assembly and method of its installation on a rod shank
US5740662A (en) * 1993-02-15 1998-04-21 Kverneland Underhaug A/S Bale wrapper apparatus
US5755284A (en) * 1993-05-06 1998-05-26 Flow Control Equipment, Inc. Extended wear rod guide and method
US5358041A (en) * 1993-05-26 1994-10-25 Enterra Patco Oil Field Products Rod guide
US5647713A (en) * 1996-05-22 1997-07-15 Trw Inc. Plastic panel fastener and method of forming the same
US5941312A (en) * 1997-09-15 1999-08-24 Rg Industries Ltd. Method of fabricating a rod guide, and a rod guide/sucker rod combination
US20060000602A1 (en) * 2004-07-01 2006-01-05 Abdo Gary E Field-installable rod guide
US7255165B2 (en) * 2004-07-01 2007-08-14 Robbins & Myers Energy Systems L.P. Field-installable rod guide
US20090166036A1 (en) * 2007-12-27 2009-07-02 Davison Matthew S Progressive cavity pump rod guide

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016046516A1 (en) * 2014-09-24 2016-03-31 Centek Ltd Centralizer and associated devices
US9664001B2 (en) 2014-09-24 2017-05-30 Centek Limited Centralizer and associated devices
CN109184589A (zh) * 2018-11-02 2019-01-11 大庆市天德忠石油科技有限公司 一种复合式抽油杆扶正器
WO2025045792A1 (en) * 2023-08-25 2025-03-06 Tenaris Connections B.V. Sucker rod guide
NL2035678B1 (en) * 2023-08-25 2025-03-10 Tenaris Connections Bv Sucker Rod Guide

Also Published As

Publication number Publication date
WO2009094139A1 (en) 2009-07-30
AR070226A1 (es) 2010-03-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBBINS & MYERS ENERGY SYSTEMS L.P., TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DAVISON, MATTHEW S.;REEL/FRAME:020475/0204

Effective date: 20080121

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION