WO2016115800A1 - Centreur en spirale de type à manchon auto-lubrifiant - Google Patents

Centreur en spirale de type à manchon auto-lubrifiant Download PDF

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Publication number
WO2016115800A1
WO2016115800A1 PCT/CN2015/080587 CN2015080587W WO2016115800A1 WO 2016115800 A1 WO2016115800 A1 WO 2016115800A1 CN 2015080587 W CN2015080587 W CN 2015080587W WO 2016115800 A1 WO2016115800 A1 WO 2016115800A1
Authority
WO
WIPO (PCT)
Prior art keywords
self
sleeve
inner ring
centralizer
ring body
Prior art date
Application number
PCT/CN2015/080587
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English (en)
Chinese (zh)
Inventor
赵锦栋
孙宇
边培明
宋大林
Original Assignee
深圳市百勤石油技术有限公司
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 深圳市百勤石油技术有限公司 filed Critical 深圳市百勤石油技术有限公司
Publication of WO2016115800A1 publication Critical patent/WO2016115800A1/fr

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/02—Sliding-contact bearings
    • F16C25/04—Sliding-contact bearings self-adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication

Definitions

  • the present invention relates to the field of geological drilling technology, and more particularly to a self-lubricating sleeve type spiral centralizer.
  • the spiral centralizer is a rigid full-eye drill stabilizer.
  • the bottom hole assembly formed by assembling a certain number of spiral centralizers at appropriate positions of the drill string can prevent the well inclination when drilling a vertical well and control the well track when drilling a directional well. It can also center the drill string, ensure the accuracy of the inclination measurement data, and improve the stability of the drill bit work.
  • the prior art spiral centralizer is a plurality of spiral belts which are driven according to a certain size on an effective centering section of a cylindrical steel body, and then a plurality of gauge alloy blocks are arranged on the spiral belt according to a certain arrangement rule.
  • the structural design can change the flow velocity profile of the annulus drilling fluid, increase the circumferential shear driving force to make the drilling fluid flowing through the spiral centralizer spiral, reduce the resistance during drilling, and smoothly return the drilling fluid to the ground, reducing The occurrence of stuck drill accidents (Liang Guihe, Guan Hongjun, Mao Yun. Application of spiral-type centralizer and drill collar combined with anti-slanting drilling tools in the construction of deep water wells in bedrock strata [J]. Hydrogeology and Engineering Geology.
  • the convection force of the drilling fluid to prevent the sedimentation is less than the gravity of the cuttings, and the debris is not accelerated again during the migration process.
  • the power is easy to form a bed of cuttings at the bottom of the annulus or at the lower side of the wellbore, resulting in complex underground conditions and affecting subsequent construction.
  • the object of the present invention is to provide a self-lubricating sleeve type spiral centralizer which is more reliable in work performance and has the capability of reducing the risk of stuck drilling, and solves the problem of poor effect and excessive vibration in the prior plastic layer in the prior art.
  • a self-lubricating sleeve type spiral centralizer includes a centralizer body, and an inner ring body protruding outward in the radial direction is formed on an outer circumference of the centralizer body, The inner ring body is gradually reduced in diameter in the direction of the two ends; the outer circumference of the inner ring body is sleeved with a sleeve rotatable relative to the inner ring body, and the inner surface of the sleeve is The outer peripheral surfaces of the inner ring bodies are adapted and a gap space is formed between each other.
  • a self-lubricating bearing structure is disposed between the sleeve and the inner ring body.
  • the self-lubricating bearing structure is provided with an inlaid textile structure having an outer lubricating surface lining on the inner surface of the sleeve and/or the outer peripheral surface of the inner ring. .
  • the self-lubricating bearing structure is characterized in that a plating layer, a galvanized layer or a chrome plating layer is plated on an outer peripheral surface of the inner ring body; and/or the sleeve The inner surface is plated with a phosphating layer, a galvanized layer or a chrome plated layer.
  • the gap between the inner surface of the sleeve and the outer peripheral surface of the inner ring body is 1 mm to 5 mm.
  • the inner ring body is gradually reduced in diameter from the intermediate position toward the both ends, and both ends of the inner ring body gradually transition to the centralizer body.
  • the inner ring body is integrally formed with the centralizer body.
  • both ends of the sleeve are edge-trimmed structures.
  • the outer circumferential surface of the sleeve is formed with uniformly arranged spiral projections and spiral recesses, the spiral projections facing away from the centralizer body
  • One side surface is provided with a gauge alloy tooth for wear resistance.
  • the number of the spiral projections is 3 to 6.
  • the self-lubricating sleeve type spiral centralizer implementing the invention has the following beneficial effects: the design of the invention
  • the lubrication sleeve type spiral centralizer uses a clearance fit between the sleeve and the inner ring body to form a structure similar to a self-lubricating joint bearing, so that it has self-lubricating, self-aligning technical performance and working characteristics, and the sleeve is in Under the impact of the annulus drilling fluid, it can rotate continuously like a turbine, so that the drilling fluid can accelerate again and generate a high-speed spiral flow field, so that the swirling speed of the drilling fluid away from the centralizer is slowed down, and the effective length of the swirling flow is increased, which is beneficial to further crushing.
  • the cuttings and the rock carry up to avoid the formation of cuttings beds, especially when the centralizer sticks, the drilling fluid displacement can be appropriately increased, the sleeve can be rotated at high speed, the cuttings bed is destroyed, and the drill string can be ensured.
  • the drilling fluid is drilled on the multi-rightener.
  • the influence of the transverse vibration mode of the column is mainly derived from the Coriolis inertial force of the fluid. Since the sleeve of the present invention is separated from the central body of the centralizer, a clearance fit is formed therebetween.
  • the vibration generated by the spiral flow of the well fluid mainly acts on the sleeve, which can distribute the load between the sleeve and the body reasonably and reduce the vibration, thereby protecting the vertical drilling instrument or the logging while drilling tool in the bottom drilling assembly to avoid vibration. Faults and failures caused by excessive size.
  • FIG. 1 is a schematic structural view of a self-lubricating sleeve type spiral centralizer of the present invention when a sleeve is not installed;
  • FIG. 2 is a schematic structural view of the self-lubricating sleeve type spiral centralizer of the present invention after installing a sleeve;
  • FIG. 3 is a schematic structural view of a sleeve of a self-lubricating sleeve type spiral centralizer according to the present invention.
  • a self-lubricating sleeve type spiral centralizer includes a centralizer body 1 .
  • the centralizer body 1 has a cylindrical shape, and a through hole 11 is formed in a central axis thereof, and the centralizer body 1 is
  • An inner ring body 2 projecting outward in the radial direction is formed on the outer circumference, and the inner ring body 2 is gradually reduced in diameter toward the both ends in the axial direction, and both ends of the inner ring body 2 gradually transition to the outer periphery of the centralizer body 1.
  • the inner ring body 2 is formed by gradually reducing the diameter from the intermediate position of the inner ring body 2 toward the both ends in the axial direction, which facilitates the fitting and assembly with the sleeve 3 described below, so that the structure is more stable and stable.
  • the outer peripheral surface of the inner ring body 2 is convex with a certain curvature Spherical inner ring.
  • the centralizer body 1 and the inner ring body 2 are integrally formed.
  • the inner ring body 2 can also be welded to the centralizer body 1.
  • the two ends of the inner ring body 2 can also be connected to the righting center. At both ends of the body 1.
  • a sleeve 3 is sleeved on the outer circumference of the inner ring body 2.
  • the inner surface of the sleeve 3 is adapted to the outer circumferential surface of the inner ring body 2 and a gap space is formed between them, so that the inner ring is formed
  • the outer peripheral surface of the body 2 is curved, so that the inner surface of the sleeve 3 is adapted to the outer peripheral surface of the inner ring body 2 such that the inner surface of the sleeve 3 also has a corresponding arc shape, that is, the inner surface of the sleeve 3 has a concave spherical outer ring of a certain curvature, such that the two sides are mutually restrained by the curved surfaces, so that the sleeve 3 is axially fixed with respect to the inner ring body 2, and the design increases the contact area between the two, thereby reducing the friction power.
  • a self-lubricating bearing structure is disposed between the sleeve 3 and the inner ring body 2, and the self-lubricating bearing structure is a composite material embedded on the inner surface of the inner ring body 2 and/or the outer peripheral surface of the sleeve 3,
  • the inlaid textile structure or the like having an outer lubricating surface lining further enables the sleeve 3 to rotate more freely with respect to the inner ring body 2;
  • the self-lubricating bearing structure may also be the outer peripheral surface of the inner ring body 2 and/or the sleeve 3
  • the inner surface can also be subjected to a special process such as plating with a phosphating layer, a galvanized layer or a chrome plating layer, or can be sprayed, so that the sleeve 3 can be rotated more freely relative to the inner ring body
  • the gap between the inner surface of the sleeve 3 and the outer peripheral surface of the inner ring body 2 is preferably from 1 mm to 5 mm, and in the present embodiment, the gap is 2 mm, and in other embodiments, it may be 1 mm, 3 mm or 5 mm. Selecting a suitable gap allows the load to be distributed between the sleeve 3 and the inner ring body 2, restricting the axial and radial displacement of the sleeve 3 and the inner ring body 2, thereby causing the load to be on the sleeve 3 and the centralizer body.
  • the distribution between 1 is reasonable, and the axial and radial displacement of the sleeve 3 and the centralizer body 1 are restricted to ensure the rotation precision and reduce the vibration, thereby protecting the vertical drilling instrument or the logging while drilling tool in the bottom drilling assembly. Avoid failures and failures caused by excessive vibration.
  • both ends of the sleeve 3 are edge-trimming structures 31, which reduces the stress concentration problem caused by the edge effect.
  • a uniformly arranged spiral convex portion 32 and a spiral concave portion 33 are formed on the outer circumferential surface of the sleeve 3.
  • the one side surface of the spiral convex portion 32 facing away from the centralizer body is provided with a gauge alloy tooth for wear resistance. (not shown in the figure).
  • the swirling speed of the annulus flow field of the centralizer position of the present invention can be changed, thereby increasing the rotation capability of the sleeve 3 and increasing the ability of the anti-cracking accident, and therefore the number of the spiral convex portions 32 is preferably 3 to 6, due to
  • the spiral convex portion 32 and the spiral concave portion 33 are alternately arranged in this order, and the number of the spiral concave portions 33 is necessarily the same as the number of the spiral convex portions 32; the thickness of the spiral convex portion 32 depends on the size of the centralizer design; and the spiral concave portion 33 and the spiral convex portion
  • the self-lubricating sleeve type spiral centralizer designed by the invention utilizes the clearance fit between the sleeve and the inner ring body to form a structure similar to the self-lubricating joint bearing, so that the self-lubricating, self-aligning technical performance and work Features. Because the annulus flow field under the action of the spiral centralizer is a spiral attenuating flow, the pressure drop and swirl velocity of the field annulus spiral flow field decrease nonlinearly, and the initial rate of decrease is very fast. With the distance from the spiral centralizer, the rate is gradually reduced. Lower, and finally turn to linear decrease.
  • the special structure design of the invention enables the sleeve to continuously rotate like a turbine under the impact of the annulus drilling fluid, so that the drilling fluid accelerates again and generates a high-speed spiral flow field, so that the swirling speed of the drilling fluid away from the centralizer is slowed down and increased.
  • the effective length of the swirling flow is beneficial to further crushing the cuttings and lifting the rock, avoiding the formation of cuttings beds, especially when the centralizer sticks, the drilling fluid displacement can be appropriately increased, so that the sleeve can be rotated at a high speed.
  • the influence of the drilling fluid flow on the vibration of the drill string is objective, and its influence on the vibration mode and natural frequency of the drill string is not Neglect, the influence of the drilling fluid on the transverse vibration mode of the multi-reinforcing drill string is mainly derived from the Coriolis inertial force of the fluid. Since the sleeve of the present invention is separated from the central body of the centralizer, a clearance fit is formed therewith, and the contact surface is set.
  • the vibration generated by the spiral flow of the drilling fluid mainly acts on the sleeve, which can make the load in the sleeve and the present.
  • the distribution between the sleeve and the centralizer body is limited in axial and radial directions to ensure the rotation accuracy and reduce the vibration, thereby protecting the vertical drilling instrument or the logging while drilling tool in the bottom drilling assembly to avoid excessive vibration. Caused failure and failure.
  • the geometry and matching clearance of the centralizer body and the sleeve can be selected according to different requirements, so that the self-lubricating sleeve type spiral centralizer can better adapt to different working environments, and can be changed by the sleeve.
  • the size of the spiral convex portion, the spiral concave portion and the helix angle to change the swirling flow of the annulus flow field at the position of the spiral centralizer Speed which in turn increases the ability of the sleeve to rotate, increases the ability to prevent stuck drills.
  • the self-lubricating sleeve type spiral centralizer of the invention improves the rock carrying capacity of the centralizer and the ability to withstand random alternating load, reduces the influence of vibration on the vertical drilling instrument and the logging while drilling instrument, and avoids the complicated situation of the underground well. And the occurrence of instrument failure.

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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)

Abstract

L'invention concerne un centreur en spirale, du type à manchon auto-lubrifiant, qui comprend un corps principal (1) de centreur ; un corps annulaire interne (2) disposé sur la périphérie du corps principal (1) de centreur faisant saillie vers l'extérieur dans la direction radiale et étant formé dans la direction axiale respectivement vers les orientations des deux extrémités et avec un rayon qui diminue progressivement ; un manchon (3) qui peut tourner par rapport au corps annulaire interne (2) étant disposé sur la périphérie du corps annulaire interne (2). La surface interne du manchon (3) et la surface périphérique du corps annulaire interne (2) sont adaptés l'un à l'autre et un espace libre est formé entre eux. Le manchon (3) du centreur en spirale du type à manchon auto-lubrifiant se libère du corps annulaire interne (2) sur le corps principal (1) du centreur et un ajustement avec jeu est formé entre le manchon et le corps annulaire interne et les surfaces de contact sont garnies de pointes en matériau composite ou subissent un processus spécial, de sorte qu'une structure de palier d'assemblage auto-lubrifiante similaire est formée entre le manchon (3) et le corps principal (1) du centreur, la structure ayant la fonction et la particularité de se lubrifier et de s'aligner automatiquement.
PCT/CN2015/080587 2015-01-19 2015-06-02 Centreur en spirale de type à manchon auto-lubrifiant WO2016115800A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510026480.3 2015-01-19
CN201510026480.3A CN105863522B (zh) 2015-01-19 2015-01-19 一种自润滑套筒式螺旋扶正器

Publications (1)

Publication Number Publication Date
WO2016115800A1 true WO2016115800A1 (fr) 2016-07-28

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WO (1) WO2016115800A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107859688B (zh) * 2017-12-04 2023-08-25 潍坊市宇宏石油机械有限公司 一种新型螺杆钻具用径向轴承及其生产工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2261299A1 (fr) * 1998-02-13 1999-08-13 Flow Control Equipment, Inc. Guide de tige avec derivation et volume d'usure permettant une erosion importante
CN2500792Y (zh) * 2001-07-19 2002-07-17 刘玉峰 采油井杆扶正器
CN201443307U (zh) * 2009-04-30 2010-04-28 杜明乾 抽油杆助抽扶正装置
CA2743691A1 (fr) * 2011-01-04 2012-07-04 Daryl Kaltwasser Guide de tige de pompe a rotor helicoidal excentre
CN102787811A (zh) * 2012-07-19 2012-11-21 中国石油天然气股份有限公司 一种定向喷枪扶正器

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Publication number Priority date Publication date Assignee Title
US5762424A (en) * 1996-10-03 1998-06-09 Rexnord Corporation Full perimeter fiber wound bearing construction
CN201031636Y (zh) * 2007-06-11 2008-03-05 关士元 旋转式扶正器
CN103089807A (zh) * 2013-01-30 2013-05-08 江苏武东机械有限公司 一种闸门陶瓷球轴承套件
CN103912223A (zh) * 2014-04-12 2014-07-09 山东陆海石油装备有限公司 旋转轴承式减阻工具
CN204511328U (zh) * 2015-01-19 2015-07-29 深圳市百勤石油技术有限公司 一种自润滑套筒式螺旋扶正器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2261299A1 (fr) * 1998-02-13 1999-08-13 Flow Control Equipment, Inc. Guide de tige avec derivation et volume d'usure permettant une erosion importante
CN2500792Y (zh) * 2001-07-19 2002-07-17 刘玉峰 采油井杆扶正器
CN201443307U (zh) * 2009-04-30 2010-04-28 杜明乾 抽油杆助抽扶正装置
CA2743691A1 (fr) * 2011-01-04 2012-07-04 Daryl Kaltwasser Guide de tige de pompe a rotor helicoidal excentre
CN102787811A (zh) * 2012-07-19 2012-11-21 中国石油天然气股份有限公司 一种定向喷枪扶正器

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Publication number Publication date
CN105863522B (zh) 2018-02-23
CN105863522A (zh) 2016-08-17

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