EP1226329B1 - Bohrstrangelement mit lagern - Google Patents

Bohrstrangelement mit lagern Download PDF

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Publication number
EP1226329B1
EP1226329B1 EP00964521A EP00964521A EP1226329B1 EP 1226329 B1 EP1226329 B1 EP 1226329B1 EP 00964521 A EP00964521 A EP 00964521A EP 00964521 A EP00964521 A EP 00964521A EP 1226329 B1 EP1226329 B1 EP 1226329B1
Authority
EP
European Patent Office
Prior art keywords
drill string
string member
bearing
sleeve
race
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 - Lifetime
Application number
EP00964521A
Other languages
English (en)
French (fr)
Other versions
EP1226329A2 (de
Inventor
Robert Patrick Appleton
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.)
APPLETON, ROBERT PATRICK
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1226329A2 publication Critical patent/EP1226329A2/de
Application granted granted Critical
Publication of EP1226329B1 publication Critical patent/EP1226329B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve

Definitions

  • This invention relates to string member, and particularly one which is adapted to reduce drag and torque on the drill string.
  • the drill string member may be suitable for making up into a rotating or non-rotating drill string, to facilitate rotation in the bore or to facilitate axial displacement of non-rotating strings during their insertion into and withdrawal from the bore.
  • the body member and bearings may be attached to a stand of drillpipe.
  • the bearing may be incorporated within the outer surface of the drillpipe, which forms the body.
  • the body has a bearing race on its outer surface and one or more bearings which can move in the bearing race.
  • the bearing race is an annular groove arranged perpendicular to the long axis of the body.
  • the races are preferably continuous so that the bearings are free to move through 360° of the race as well as being free to rotate on their axes in the race.
  • the bearings are preferably ball bearings (ie spheres). In such embodiments vertical drag and radial torque are reduced.
  • the bearings may be roller bearings (ie cylinders) or any suitable type of bearing.
  • the bearings are preferably retained in the race by overcentre side walls so that the bearings are permitted to protrude from the race beyond the outer surface of the body to a small extent in order to bear against the inner surface of a well bore or casing, and are preferably retained in place by a moveable sleeve which abuts the bearings on one side and by a shoulder which abuts the bearings on the other.
  • the sleeve and shoulder preferably provide abutments which extend around the centre of the bearings so as to retain them in the bearing race when the tool is assembled.
  • the bearings may be retained by an first upper and a second lower sleeve.
  • Each sleeve is typically provided with one or more seals such as o-ring seals in order to restrict the ingress of drill cuttings and other debris.
  • the sleeve(s) are preferably spring-loaded so as to force the bearings into the race and to take up any play therein, and the loading of the spring is preferably adjustable.
  • each sleeve preferably has a shoulder which abuts the bearings.
  • the spring(s) keep the sleeves in contact with the bearings.
  • a snap-on or shrink-on lock ring such as a heat sensitive shrink ring or a screw-on collar or lock ring or a circlip can be used to retain the sleeves, the bearings and optionally the spring forcing the sleeves against the bearings.
  • components of the invention comprise steel. Most preferably contact surfaces of the components of the invention are protected with a hard facing material such as tungsten carbide.
  • Certain embodiments of the invention provide the advantage that the bearing races are self-cleaning thereby reducing the level of maintenance to free stuck bearings, and in certain embodiments all bearings can be released for cleaning by manipulation of very few parts of the apparatus.
  • a drill string member has a tubular body 1 having a box and pin section at respective ends as is common in the art and a through bore 2.
  • the tubular body 1 has an outer surface with a first bearing race 5 cut in an annular ring around the outer surface of body 1 perpendicular to the axis of the through bore 2.
  • the first bearing race 5 is bounded on its upper surface by a shoulder 5s which extends in part downwards towards the lower end of the tool from the upper end of the race 5, the purpose of which will be explained below.
  • a second bearing race 6 of similar construction (apart from the upper shoulder 5s) is provided lower down the tool body 1, and annular grooves 10 are provided between the bearing races and below the second race 6 for receiving o-rings.
  • a further annular groove 11 is provided below the lowermost o-ring groove for receiving a lock ring.
  • a first annular sleeve 15 comprises an annular band of steel with cupped upper and lower edges 16u, 161. The cupped edges, 16u, 161 each have an outer shoulder 16s which extends upwardly and downwardly respectively of the sleeve 15.
  • a lower sleeve 20 has an upper cup 21 with a similar upwardly pointing shoulder 21s, and an inner rabbet 23 at its lower surface to receive a bevel spring to be described.
  • the bearing races 5 and 6, and the cups 16 and 21 on the sleeve 15 and 20 are faced with tungsten carbide or a similar hard facing material in order to withstand wear on the surfaces of the races and sleeves by the bearings.
  • the tool is assembled by placing o-rings 12 into annular grooves 10 and threading the upper sleeve 15 onto the lower end 11 of the body.
  • the spherical bearings 25 are then inserted into the upper race 5, and are held in place by the overcentre opposing shoulders 5s on the body 1 and similar shoulders 16s on the upper sleeve 15.
  • the upper sleeve 15 is wide enough to hold the bearings 25 in the upper race and provides a second shoulder 16s adjacent to the lower race 6.
  • the lower sleeve 20 is then threaded onto the lower end 11 of the body and the bearings 75 can be inserted into and retained within the lower race 6 between the lower shoulder 16s of the first sleeve 15 and the upper shoulder 21s of the second sleeve 20 in a similar manner to the first set of bearings 25.
  • the rabbet 23 accommodates an annular bevel spring 27 which is threaded onto the lower end of the body 11 in the same way, and the annular lock ring 30 of expandable metal is heated to expand its diameter, offered up onto the lower end of the body 11 and left to cool in place in the lowermost annular groove 11 until it engages with the groove and maintains the spring 27 in compression between it and the rabbet 23 on the lower sleeve 20.
  • the bearings 25 protrude by around a third of their width from the races 5, 6 and the innermost surface of the well bore or casing etc is therefore contacted by the bearings 25 rather than the outer surface of the tool body 1.
  • the freedom of the bearings 25 to move in the races 5, 6 means that less torque is needed to rotate the string due to the lower friction, and the upward and downward thrust on the string can similarly be enhanced due to the lower friction.
  • Certain embodiments of the invention permit the transfer of more power to the bit from the motor.
  • the o-rings 12 resist the ingress of drill cuttings etc behind the sleeves 15, 20 and the fact that the races 5, 6 are annular without impediment to circumferential movement of each ball around the annular ring of each race 5, 6 means that the races 5, 6 are self cleaning in the event that any drill cuttings or any debris enters them.
  • the ring 30 is heated to expand it and is thereafter removed from the groove 11, and the tool is stripped down in reverse process from its construction as described above.
  • the heat sensitive ring 30 can be replaced by a circlip and need not be completely annular.
  • a screw-on collar 31 with an internal screw thread can be used on a modified body 1a shown in Fig. 8 instead of a circlip or shrink ring 30.
  • the inner threads on the collar 31 mates with co-operating threads on the outer surface of the body la below the lowermost o-ring groove 10, so that the collar 31 can be screwed onto the body la to retain the spring 27 and sleeve 20 in place.
  • Certain embodiments of the invention can provide a significant reduction in rotary torque and tripping drag, and can reduce casing wear. Some embodiments of the invention allow easier steering capability of strings, and need not have any restrictions on their operating temperature.
  • FIG. 9 An alternative embodiment is shown in Fig. 9.
  • the sleeves are provided in pairs 115, 120 and 150, 160.
  • a circumferentially extending annular resilient buffer (not shown) or one or more separate longitudinally extending springs 153 are provided between suitable shoulders 151, 152 on each sleeve 115, 120.
  • the springs 153 abut the shoulders 151, 152 which forces the opposite ends 116u of sleeve 115 and the lower end 1161 of sleeve 120 into contact with the bearings 125 and 175 respectively.
  • the spring mechanism thus ensures contact between the sleeves 115, 120 and the bearings 125, 175 even as the bearings 125, 175 wear and reduce in size through use.
  • a similar buffer (not shown) or springs 154 are provided between the second pair of sleeves 150, 160 to provide a similar function. Features not described in this embodiment are similar to those as described for previous embodiments.
  • maintenance of the apparatus may be performed infrequently as the apparatus functions adequately even when the bearings have been worn through use. Consequently, the cost to replace the bearings and on the time spent stripping down the apparatus to replace the bearings may be saved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Adornments (AREA)
  • Rolling Contact Bearings (AREA)
  • Harvester Elements (AREA)
  • Surgical Instruments (AREA)
  • Drilling Tools (AREA)
  • Toys (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (26)

  1. Ein Bohrstrangteil, der Folgendes beinhaltet:
    einen Körper (1);
    mindestens ein Lager (25, 75, 125, 175), das nach außen zur Berührung mit einem Bohrloch vom Körper vorsteht;
    mindestens eine Muffe (15, 20, 115, 125, 150, 160) um den Körper, dadurch gekennzeichnet, dass das Lager auch nach außen von der Muffe vorsteht und ein elastisches Komprimierungsmittel (27, 153, 154) angepasst ist, um die Muffe entlang dem Körper (15, 20, 115, 125, 150, 160) gegen das Lager (25, 75, 125, 175) zu drücken, um das Lager (25, 75, 125, 175) zu halten.
  2. Bohrstrangteil gemäß Anspruch 1, wobei mindestens ein Lager (25, 75, 125, 175) in einem Laufring (5, 6) auf dem Körper (1) festgehalten wird.
  3. Bohrstrangteil gemäß Anspruch 2, wobei der Laufring (5, 6) eine Ringnut ist.
  4. Bohrstrangteil gemäß Anspruch 2 oder Anspruch 3, der mehr als einen Laufring (5, 6) aufweist.
  5. Bohrstrangteil gemäß einem der Ansprüche 2 bis 4, wobei der mindestens eine Ring senkrecht zur Achse des Körpers (1) liegt.
  6. Bohrstrangteil gemäß einem der Ansprüche 2 bis 5, wobei der mindestens eine Ring kontinuierlich ist.
  7. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei das mindestens eine Lager (25, 75, 125, 175) eine Kugel ist.
  8. Bohrstrangteil gemäß einem der Ansprüche 1 bis 6, wobei das mindestens eine Lager (25, 75, 125, 175) ein Zylinder ist.
  9. Bohrstrangteil gemäß einem der Ansprüche 2 bis 8, wobei das mindestens eine Lager (25, 75, 125, 175) in dem mindestens einen Ring (5, 6) durch Sprungschaltseitenwände (5s) in dem mindestens einen Ring (5, 6) gehalten wird.
  10. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei die mindestens eine Muffe (15, 20, 115, 125, 150, 160) auf mindestens einer Seite an das mindestens eine Lager (25, 75, 125, 175) stößt.
  11. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, der mehr als eine Muffe (15, 20, 115, 125, 150, 160) beinhaltet.
  12. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei die mindestens eine Muffe (15, 20, 115, 125, 150, 160) mit ein oder mehreren Dichtungen (12) versehen ist.
  13. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei das elastische Komprimierungsmittel (27, 153, 154) einen Puffer beinhaltet.
  14. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei das elastische Komprimierungsmittel (27, 153, 154) ringförmig ist.
  15. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei das elastische Komprimierungsmittel (27, 153, 154) mindestens eine Feder beinhaltet.
  16. Bohrstrangteil gemäß Anspruch 15, wobei die Feder eine abgeschrägte Feder ist.
  17. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei ein Halteteil (30, 31) verwendet wird, um die mindestens eine Muffe (15, 20, 115, 125, 150, 160) zu halten.
  18. Bohrstrangteil gemäß Anspruch 17, wobei sich das elastische Komprimierungsmittel (27, 153, 154) zwischen dem Halteteil und der Muffe oder zwischen der ersten und zweiten Muffe erstreckt.
  19. Bohrstrangteil gemäß Anspruch 14, wobei der Halteteil (30, 31) ein aufsteckbarer oder schrumpfbarer Klemmring, eine aufschraubbare Einfassung, ein Klemmring oder ein Sicherungsbügel ist.
  20. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, der einen Belastungseinstellmechanismus für das elastische Komprimierungsmittel aufweist.
  21. Bohrstrangteil gemäß Anspruch 20, wobei der Halteteil einen aufschraubbare Einfassung mit Gewinden, die in Gewinde auf dem Körper eingreifen, aufweist, und der eine Kante, die mit dem Kompriemierungsmittel in Berührung steht, aufweist.
  22. Bohrstrangteil gemäß einem der Ansprüche 2 bis 21, wobei das mindesten eine Lager (25, 75, 125, 175) undloder der mindestens eine Ring (5, 6) durch Schlammeintritt geschmiert werden.
  23. Bohrstrangteil gemäß einem der Ansprüche 2 bis 22, wobei der mindestens eine Laufring (5, 6) selbstreinigend ist.
  24. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, wobei das mindestens eine Lager (25, 75, 125, 175) zum Reinigen gelöst werden kann.
  25. Bohrstrangteil gemäß einem der vorhergehenden Ansprüche, der eine Länge eines Gestängerohrs beinhaltet.
  26. Bohrstrangteil gemäß einem der Ansprüche 1 bis 24, der ein Zwischenstück oder eine Muffe (15, 20, 115, 125, 150, 160), die an einer Länge des Gestängerohrs angebracht werden kann, beinhaltet.
EP00964521A 1999-10-13 2000-10-06 Bohrstrangelement mit lagern Expired - Lifetime EP1226329B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9924114.3A GB9924114D0 (en) 1999-10-13 1999-10-13 Drill pipe
GB9924114 1999-10-13
PCT/GB2000/003829 WO2001027434A2 (en) 1999-10-13 2000-10-06 Drill string member with bearings

Publications (2)

Publication Number Publication Date
EP1226329A2 EP1226329A2 (de) 2002-07-31
EP1226329B1 true EP1226329B1 (de) 2003-12-17

Family

ID=10862585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00964521A Expired - Lifetime EP1226329B1 (de) 1999-10-13 2000-10-06 Bohrstrangelement mit lagern

Country Status (8)

Country Link
EP (1) EP1226329B1 (de)
AT (1) ATE256817T1 (de)
AU (1) AU7544900A (de)
CA (1) CA2385443A1 (de)
DE (1) DE60007349D1 (de)
GB (1) GB9924114D0 (de)
NO (1) NO20021630D0 (de)
WO (1) WO2001027434A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0118270D0 (en) * 2001-07-27 2001-09-19 Internat Tubular Services Ltd "Tool string member with bearings"
WO2014194420A1 (en) * 2013-06-03 2014-12-11 Evolution Engineering Inc. Mud motor with integrated abrasion-resistant structure
CN103710015B (zh) * 2013-12-25 2016-08-17 四川宝麟新材料科技有限公司 一种油气田增产用乳液型减阻剂及其制备方法
CN110080693B (zh) * 2018-01-25 2020-10-09 中国石油化工股份有限公司 一种钻具扶正器
GB201803284D0 (en) 2018-02-28 2018-04-11 Kaseum Holdings Ltd Roller tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877395A (en) * 1928-05-14 1932-09-13 Emsco Derrick & Equip Co Antifriction device for drill pipe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8914882D0 (en) * 1989-06-29 1989-08-23 Red Baron Oil Tools Rental Drill string component
US5148876A (en) * 1991-06-10 1992-09-22 Prideco, Inc. Lightweight drill pipe
US5339910A (en) * 1993-04-14 1994-08-23 Union Oil Company Of California Drilling torsional friction reducer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877395A (en) * 1928-05-14 1932-09-13 Emsco Derrick & Equip Co Antifriction device for drill pipe

Also Published As

Publication number Publication date
DE60007349D1 (de) 2004-01-29
NO20021630L (no) 2002-04-05
CA2385443A1 (en) 2001-04-19
EP1226329A2 (de) 2002-07-31
AU7544900A (en) 2001-04-23
NO20021630D0 (no) 2002-04-05
ATE256817T1 (de) 2004-01-15
WO2001027434A2 (en) 2001-04-19
WO2001027434A3 (en) 2001-10-11
GB9924114D0 (en) 1999-12-15

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