EP1162344A1 - Elément de tige de forage à réduction de frottement - Google Patents

Elément de tige de forage à réduction de frottement Download PDF

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Publication number
EP1162344A1
EP1162344A1 EP01302461A EP01302461A EP1162344A1 EP 1162344 A1 EP1162344 A1 EP 1162344A1 EP 01302461 A EP01302461 A EP 01302461A EP 01302461 A EP01302461 A EP 01302461A EP 1162344 A1 EP1162344 A1 EP 1162344A1
Authority
EP
European Patent Office
Prior art keywords
inner bearing
outer sleeve
component
mandrel
mandrel body
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.)
Withdrawn
Application number
EP01302461A
Other languages
German (de)
English (en)
Inventor
Gholam Hossein Rastegar
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.)
Weatherford Lamb Inc
Original Assignee
Offshore Rentals Ltd
Weatherford Lamb Inc
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 Offshore Rentals Ltd, Weatherford Lamb Inc filed Critical Offshore Rentals Ltd
Publication of EP1162344A1 publication Critical patent/EP1162344A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • This invention relates to equipment used on a drillstring to reduce the rotational friction between the rotating drillstring and the borehole wall.
  • the said equipment is particularly useful in the oil, gas and mining industries especially, but not exclusively, for drilling of high angle, horizontal and extended reach wells.
  • a drillstring is assembled above a drill bit.
  • the drillstring is used to transfer the rotary motion from the surface equipment to the drill bit, thereby causing the drill bit to rotate and penetrate the sub surface formation.
  • the torque required at surface to rotate the drill bit is substantially increased due to the friction caused by contact between the drillstring and the wall of the borehole.
  • the rotational contact between the drillstring and the borehole wall causes wear on drillstring as well as causing damage and wear to the steel cased section of the borehole wall.
  • the drilling process also involves pumping of drilling fluid down the bore through the inside diameter of the drillstring to improve the drilling performance of the bit, to assist with cooling and lubrication of the bit as well as providing the means to transfer the drill cuttings to surface. Conveyance of the drill cuttings is a function of well depth, well profile, shape and size of drill cuttings, mechanical properties of the drilling fluid and the capacity of surface mud pumps.
  • a component for forming part of a drill string comprising a mandrel having couplings for connection with the drill string, a bearing member mounted on the mandrel and a sleeve member mounted on the bearing member.
  • the bearing member is an inner bearing member
  • the sleeve member is an outer sleeve member
  • the component further comprises first and second retaining members for retaining the inner bearing member, and the outer sleeve member on the mandrel.
  • the retaining members also prevent longitudinal movement of the inner bearing member, and the outer sleeve member, on the mandrel.
  • at least one of the first and second retaining members is removable or retractable from the mandrel, and more preferably, is removable or retractable from the mandrel to permit the inner bearing member, and the outer sleeve member, to be removed from the mandrel.
  • one of the first and second retaining members is removable from the mandrel by removing one or more fixture devices, and typically, the other of the first and second retaining members is integral with the mandrel.
  • the inner bearing member is provided in at least two portions, the portions preferably when brought together forming a substantially tubular member. More preferably, there are two portions, each portion comprising a half cylindrical member.
  • the at least two portions are mounted in a recess of the mandrel, the recess comprising a reduced diameter portion with reference to the diameter of the drill string, and particularly to the diameter of the joints of the drill string.
  • the outer sleeve member is arranged coaxially with the inner bearing member in use of the component, and preferably, a selective locking mechanism is provided to prevent relative rotational movement between the inner bearing member and the outer sleeve member in use of the component.
  • the selective locking mechanism may comprise a first locking device provided on the inner bearing member and a second locking device provided on the outer sleeve member.
  • the first locking device is provided on the outer surface of the inner bearing member and the second locking device is provided on the inner surface of the outer sleeve member.
  • the first and second locking devices interact with one another to provide the locking action.
  • the first and second locking devices are formations provided on the respective surfaces of the inner bearing member and outer sleeve member, and more preferably, the formations are arranged longitudinally at least partly along the length of the respective inner bearing member and outer sleeve member.
  • a third locking device which may be in the form of a key, may be provided to interact with the first and second locking devices to provide the locking action.
  • the component further comprises a second inner bearing member which is typically provided in at least two portions, the portions preferably when brought together forming a substantially tubular member. More preferably, there are two portions, each portion comprising a half cylindrical member. Preferably, the at least two portions are mounted in the same recess of the mandrel that the two portions of the first inner bearing member are mounted.
  • the first and second bearing members each comprise a device which separates the outer sleeve member from the mandrel. Typically the separating device is a flange.
  • the first inner bearing member is capable of rotation with respect to the second inner bearing member.
  • a selective locking mechanism is provided to prevent relative rotational movement between the second inner bearing member and one of the first and second retaining members in use of the component.
  • the selective locking mechanism may comprise a first locking device provided on the second inner bearing member and a second locking device provided on the said one of the retaining members.
  • the first locking device is provided on the outer surface of the second inner bearing member and the second locking device is provided on the inner surface of the said one of the retaining members. More preferably, the first and second locking devices interact with one another to provide the locking action.
  • the first and second locking devices are formations provided on the respective surfaces of the second inner bearing member and said one of the retaining members, and more preferably, the formations are arranged longitudinally at least partly along the length of the respective second inner bearing member and said one of the retaining members.
  • a third locking device which may be in the form of a key, is provided to interact with the first and second locking devices to provide the locking action.
  • the outer sleeve member is a one-piece outer sleeve member.
  • the mandrel is a one-piece or unitary mandrel body.
  • the component may be dismantled by removing one of the retaining devices and removing, if present, the second inner bearing member, and then removing the outer sleeve member over one end of the mandrel, and then removing the first inner bearing member.
  • a section of the mandrel directly above and/or below the first and/or second retaining member may be spirally milled and fluted to provide integral spiral blades.
  • the mandrel, stops, outer sleeve member, inner bearing member(s) and the retaining devices are made of steel, but the inner bearing member(s) and/or outer sleeve member may also be made from high temperature/high impact/wear resistant ceramics, such as alumina ceramic, polymers or metals other than steel.
  • a mandrel body 5 forming part of a first embodiment of a friction reducing drill string component 1 in accordance with the present invention is shown in Fig. 1.
  • the mandrel body 5 comprises a male pin end 10 and female box end 11, both of which 10, 11 are provided with standard API screw threads to permit the mandrel body 5 to be included in a drill string (not shown).
  • the mandrel body 5 further comprises a mandrel bore 12, mandrel body upper neck 13a, mandrel body lower neck 13b and a mandrel body recess 13c, a threaded bore 14 and an integral first stop 15.
  • the mandrel body 5 is a one-piece component.
  • the first stop 15 may be lengthened, and also that the first stop may be spirally milled on it's outer surface to form integral blades proposed for hydra-mechanical and hydra-dynamic drill cuttings bed removal.
  • Fig. 2 illustrates the assembly arrangement of an outer sleeve 21, inner bearing members 20 and retaining systems 15, 16 in place on the mandrel body 5 to form the friction reducing drill string component 1 in accordance with the present invention.
  • a removable second stop 16 having circular access ports 17, a one piece outer sleeve 18 which is preferably provided with straight or spiral blades 21, a two-piece inner sleeve 20 flanged at it's lower end, longitudinal dove-tailed grooves 22a formed on the inner surface of the outer sleeve 18, and longitudinal dove-tailed integral splines 22b formed on the outer surface of the inner bearing members 20.
  • the second stop 16 is in the form of an annular ring 16. It should be noted that the dove-tailed splines 22b and grooves 22a preferably do not extend the entire length of the sleeves.
  • the inner bearing members 20 are formed from two half-cylinder shaped inner bearings 20a and 20b.
  • outer sleeve 18 is slid over the mandrel body upper neck 13a.
  • outer sleeve 18 will slide over the inner bearing members 20 in a downward sliding manner until the lower end of the outer sleeve 18 rests directly on top of the flanged end of the inner bearing members 20.
  • the second stop 16 is then slid over the mandrel body upper neck 13a and is lowered downwardly toward the outer sleeve 18 until each access port 17 lines up with it's corresponding threaded bore 14.
  • the second stop 16 is then secured on mandrel body upper neck 13a as illustrated in Fig. 4.
  • the dove-tailed fitting arrangement of the outer sleeve 18 over the inner bearing members 20 prevents relative circumferential movement between the inner bearing members 20 and the outer sleeve 18.
  • the second stop 16 is secured to the mandrel body upper neck 13a by means of a number of threaded retaining bolts 24 protruding through the respective circular access port 17, fitted and screwed into each corresponding threaded bore 14 and tightened to a specified torque.
  • a locking clip 26 is then fitted into a locking clip recess 25 on each circular access port 17, this being a secondary safety measure to prevent the threaded locking bolt 24 from accidental unwinding and dislodgement.
  • the outer sleeve 18 and inner bearing members 20a, 20b are mounted on the mandrel body 5, and secured in position by the retaining devices 16, 15, the outside diameter of the outer sleeve 18 is sufficiently greater than the outside diameter of the drill pipe tool joints (not shown) which form the rest of the drill string.
  • the friction reducing drill string component 1 is installed in the drill string, only the outer surface of the outer sleeve 18 will contact the wellbore wall and the drill pipe tool joint is not in contact with the wellbore wall.
  • the outer sleeve 18 is in contact with the bore wall and does not rotate whilst the mandrel body 5 rotates with the drillstring.
  • the outside diameter of the mandrel body recess 13c here referred to as 'd' is smaller than the outside diameter of drill pipe tool joint here referred to as 'D'.
  • the first embodiment of the component 1 has the advantage that the pair of inner bearing members 20 can be formed from a different, and preferably less expensive material, than the outer sleeve 18 and in this manner, the inner bearing members 20 can be designed to be sacrificed and replaced when required.
  • a mandrel body 105 forming part of a second embodiment of a friction reducing drill string component 100 in accordance with the present invention is shown in Fig. 5.
  • the mandrel body 105 again comprises a male pin end 110 and female box end 111 in a similar fashion as the mandrel 5.
  • the mandrel body 105 also comprises a mandrel bore 112, mandrel body upper neck 113a, mandrel body lower neck 113b and a mandrel body recess 113c, a number of threaded bores 114 and an integral first stop 115.
  • the integral first stop 115 formed in the mandrel body 105 is above the mandrel body recess 113c, whereas the integral first stop 15 formed in the mandrel body 5 of the first embodiment is below the mandrel body recess 13c. Accordingly, the mandrel body 105 is again a one-piece component.
  • the first stop 115 is spirally milled on its outer surface to form integral blades 150 for hydra-mechanical and hydra-dynamic drill cuttings bed removal.
  • Fig. 24 illustrates the assembly arrangement of an outer sleeve 121, a pair of first inner bearing members 120 flanged at their upper ends, a pair of second inner bearing members 155 flanged at their upper ends and retaining systems 115, 116 in place on the mandrel body 105 to form the friction reducing drill string component 100 in accordance with the second aspect of the present invention. Also shown in Fig. 24 is a removable second stop 116 having circular access ports 117 (shown in Figs.
  • a one piece outer sleeve 118 which is provided with spiral blades 121, longitudinal rectangular shaped grooves 122a formed on the inner surface of the outer sleeve 118, and longitudinal rectangular grooves 122b formed on the outer surface of the first pair of inner bearing members 120, and longitudinal rectangular grooves 122c formed on the outer surface of the second pair of inner bearing members 155.
  • the second stop 116 is in the form of an annular ring 116, and is provided with longitudinal rectangular grooves 122d formed on its outer surface.
  • rectangular grooves 122a, 122b, 122c and 122d preferably do not extend the entire length of the respective outer sleeve 118, first pair of inner bearing members 120, second pair of inner bearing members 155 and second stop 116.
  • the first pair of inner bearing members 120 are formed from two half-cylinder shaped inner bearings 120, and as shown in Figs. 12 to 15, the second pair of inner bearing members 155 are formed from two half-cylinder shaped inner bearings 155.
  • the first pair of inner bearing members 120 are positioned around the mandrel body 105 within the mandrel body recess 113c, such that the flange is arranged at the upper in use end of the component 100.
  • a rectangular longitudinal key (not shown) is then placed into each groove 122b of the first pair of inner bearing members 120.
  • the one piece outer sleeve 118 is slid over the mandrel body lower neck 113b. After lining up the rectangular grooves 122a with the rectangular longitudinal keys, the outer sleeve 118 is slid over the inner bearing members 120 in an upward sliding manner until the upper end of the outer sleeve 118 rests directly against the underside of the flanged end of the first pair of inner bearing members 120.
  • the second pair of inner bearing members 155 are then positioned around the mandrel body 105 within what is left open of the mandrel body recess 113c, such that the flange of the second pair of inner bearing members 155 is arranged at the lower end of the outer sleeve 118 and the first pair of inner bearing members 120.
  • a rectangular longitudinal key (not shown) is then placed into each groove 122c of the second pair of inner bearing members 155.
  • the second stop 116 is then slid over the mandrel body lower neck 113b and, after lining up the rectangular grooves 122d with the rectangular longitudinal keys, the second stop 116 is slid over the second pair of inner bearing members 155 in an upward sliding manner toward the flange of the second pair of inner bearing members 155 until each access port 117 lines up with it's corresponding threaded bore 114.
  • the second stop 116 is then secured on mandrel body lower neck 113b with suitable threaded retaining bolts (not shown) and associated locking clips (not shown).
  • the mandrel body 115 is provided with a further circumferential groove or recess 113d, around which a metal circlip (not shown) may be fitted.
  • This further metal circlip and recess 113d provides a tertiary safety mechanism to prevent the dislodgement of the second retaining system (in the form of the second stop 116) if the primary safety mechanism (in the form of the bolts) and secondary safety mechanism (in the form of the associated locking clips) were to fail.
  • the rectangular fitting arrangement between the grooves 122a of the outer sleeve 118, the rectangular keys and the grooves 122b of the first pair of inner bearing members 120 prevents relative circumferential movement between the first pair of inner bearing members 120 and the outer sleeve 118. Also, the rectangular fitting arrangement between the grooves 122d of the second stop 116, the rectangular keys and the grooves 122c of the second pair of inner bearing members 155 prevents relative circumferential movement between the second pair of inner bearing members 155 and the second stop 116.
  • the second embodiment of the component 100 has the advantage that the first 120 and second 155 pairs of inner bearing members can be formed from a different, and preferably less expensive material, than the outer sleeve 118 and in this manner, the first 120 and second 155 pairs of inner bearing members can be designed to be sacrificed and replaced when required.
  • the outer sleeve 121 contacts the wellbore wall, no portion of the mandrel 115 is in direct contact with the outer sleeve 118, and since the outer sleeve 118 is preferably formed from a relatively hard wearing material, the lifespan of the mandrel body 115 is increased.
  • first 120 and second 155 pairs of inner bearing members that provide the bearing surfaces with the mandrel 115, and so the material from which they are formed can be chosen to be less likely to damage the mandrel body 115.
  • first 120 and second 155 pairs of inner bearing members that are in direct contact with the mandrel body 115 and the outer sleeve 121 is not in direct contact with the mandrel body 115.
  • the embodiments of the present invention provide a robust, fail safe mechanical, non-rotating stand-off on the drillstring so as to remove the rotational contact between the drillstring and the bore wall and therefore prevent damage or wear of drillstring and the cased section of the bore.
  • the embodiments described herein also provide a means to reduce the rotational friction surface area of the drillstring, and therefore reduce the torque required to rotate the drill string at the surface.
  • the embodiments described herein also provide a combined hydra-mechanical and hydra-dynamic means of agitating the cuttings bed in order to improve the drilling fluid circulation.
  • the embodiments of the present invention provide the advantage that they allow for removal of the outer sleeve 18; 118 without dismantling of the mandrel body 5; 115 or outer sleeve 18; 118 or heat expansion of the outer sleeve 18; 118 and yet allow the effective inside diameter of the rotatable part of the component 1; 100 that is the combination of the inner bearing member 20; 120 and the outer sleeve 18; 118 to be smaller than the outside diameter of the upper and lower ends of the mandrel body 5; 115, hence providing a smaller bearing surface area between the inner bearing member 20; 120 and the mandrel body 5; 115 which results in lowered friction and torque.
  • mandrel body 5; 115 may take the form of a full length (range 1 being 20 foot in length, range 2 being 31 foot in length or range 3 being 40 foot in length) drillpipe (not shown), or may take the form of drillpipe pup joints (not shown) of any length.

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  • 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)
  • Earth Drilling (AREA)
EP01302461A 2000-03-16 2001-03-16 Elément de tige de forage à réduction de frottement Withdrawn EP1162344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0006218.2A GB0006218D0 (en) 2000-03-16 2000-03-16 Torque reducing drillstring component
GB0006218 2000-03-16

Publications (1)

Publication Number Publication Date
EP1162344A1 true EP1162344A1 (fr) 2001-12-12

Family

ID=9887657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01302461A Withdrawn EP1162344A1 (fr) 2000-03-16 2001-03-16 Elément de tige de forage à réduction de frottement

Country Status (3)

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US (1) US20020129976A1 (fr)
EP (1) EP1162344A1 (fr)
GB (2) GB0006218D0 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7699109B2 (en) * 2006-11-06 2010-04-20 Smith International Rotating control device apparatus and method
BRPI0814405B1 (pt) 2007-07-06 2018-06-05 Halliburton Energy Services, Inc. Ferramenta para manutenção de poço
US8627890B2 (en) 2007-07-27 2014-01-14 Weatherford/Lamb, Inc. Rotating continuous flow sub
GB0815572D0 (en) * 2008-08-27 2008-10-01 Advanced Oilfield Composities Composite tubular product
NO346112B1 (en) * 2008-08-29 2022-02-28 Statoil Petroleum As Drill pipe protector assembly
US8905162B2 (en) * 2010-08-17 2014-12-09 Trendon Ip Inc. High efficiency hydraulic drill bit
FR2980815B1 (fr) * 2011-10-04 2013-09-27 Vam Drilling France Element de garniture de forage et tige de forage correspondante
GB201309853D0 (en) 2013-05-29 2013-07-17 Simpson Neil A A Torque reduction sub
ITTO20130778A1 (it) * 2013-09-30 2015-03-31 Drillmec Spa Dispositivo anti-attrito di elementi di trivellazione
SG10201502460SA (en) * 2015-03-27 2016-10-28 Drilltech Services Asia Pte Ltd An improved sub assembly
GB2595333B (en) * 2021-02-24 2022-06-01 Nxg Tech Limited Torque reduction assembly
US12006778B2 (en) * 2021-09-23 2024-06-11 Wwt North America Holdings, Inc. Non-rotating drill pipe protector tool having multiple types of hydraulic bearings

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815930A (en) * 1954-02-23 1957-12-10 Lynn W Storm Drill pipe stabilizer and guide bushing
US4989679A (en) * 1987-12-23 1991-02-05 Institut Francais Du Petrol Centering device that can be engaged or disengaged, specifically for a drilling assembly
EP0721539A1 (fr) * 1993-10-14 1996-07-17 Rototec Limited Dispositifs antifrictions de la tige de forage d'un tubage et d'un gainage
WO1997008423A1 (fr) * 1995-08-30 1997-03-06 Drilltech Services (North Sea) Limited Element de tige de forage a reduction de frottement
WO2000001239A2 (fr) * 1998-07-02 2000-01-13 Drilltech Services (Asia) Pte Ltd. Element de train de tiges reducteur de frottement
US6032748A (en) * 1997-06-06 2000-03-07 Smith International, Inc. Non-rotatable stabilizer and torque reducer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1098894A (fr) * 1979-07-19 1981-04-07 Inco Limited Traduction non-disponible
US4709462A (en) * 1986-08-04 1987-12-01 Oil Patch Group, Inc. Method for assembling a well drilling tool
GB8914882D0 (en) * 1989-06-29 1989-08-23 Red Baron Oil Tools Rental Drill string component
GB9317128D0 (en) * 1993-08-17 1993-09-29 Swietlik George Equipment to reduce torque on a drill string

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815930A (en) * 1954-02-23 1957-12-10 Lynn W Storm Drill pipe stabilizer and guide bushing
US4989679A (en) * 1987-12-23 1991-02-05 Institut Francais Du Petrol Centering device that can be engaged or disengaged, specifically for a drilling assembly
EP0721539A1 (fr) * 1993-10-14 1996-07-17 Rototec Limited Dispositifs antifrictions de la tige de forage d'un tubage et d'un gainage
WO1997008423A1 (fr) * 1995-08-30 1997-03-06 Drilltech Services (North Sea) Limited Element de tige de forage a reduction de frottement
US6032748A (en) * 1997-06-06 2000-03-07 Smith International, Inc. Non-rotatable stabilizer and torque reducer
WO2000001239A2 (fr) * 1998-07-02 2000-01-13 Drilltech Services (Asia) Pte Ltd. Element de train de tiges reducteur de frottement

Also Published As

Publication number Publication date
US20020129976A1 (en) 2002-09-19
GB0106480D0 (en) 2001-05-02
GB2360305A (en) 2001-09-19
GB0006218D0 (en) 2000-05-03
GB2360305A9 (en) 2001-10-10

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