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WO2016162771A1 - Centreur doté de boutons à coefficient de frottement réduit et son procédé de fabrication - Google Patents

Centreur doté de boutons à coefficient de frottement réduit et son procédé de fabrication Download PDF

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Publication number
WO2016162771A1
WO2016162771A1 PCT/IB2016/051572 IB2016051572W WO2016162771A1 WO 2016162771 A1 WO2016162771 A1 WO 2016162771A1 IB 2016051572 W IB2016051572 W IB 2016051572W WO 2016162771 A1 WO2016162771 A1 WO 2016162771A1
Authority
WO
WIPO (PCT)
Prior art keywords
centralizer
buttons
low friction
friction
collar
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.)
Ceased
Application number
PCT/IB2016/051572
Other languages
English (en)
Inventor
Abhishek AVASTHI
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.)
Individual
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
Priority to GB1702976.0A priority Critical patent/GB2552563A/en
Priority to US15/507,564 priority patent/US20170306708A1/en
Publication of WO2016162771A1 publication Critical patent/WO2016162771A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
    • E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations
    • 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
    • E21B17/1085—Wear protectors; Blast joints; Hard facing

Definitions

  • the present invention relates to a centralizer with low friction buttons. More specifically, the present invention provides a centralizer device that has low friction buttons that are designed and placed strategically on the centralizer so as to reduce the start up torque while running down or coming up a casing.
  • Centralizers are used to place the pipes and casings in the centre of the wellbore and to allow cement to circulate freely around the tube and produce a robust cement seal, ensuring the zonal isolation. Centralizers also minimize the differential sticking of the casing to the wellbore and thus equalize the hydrostatic pressure in the annulus.
  • centralizers are not strong enough or if they break the consequences can be very expensive. Approximately 400 wells worldwide are affected by centralizer problems. An average cost of per well is 1.5 million and thus producing a total loss of 0.6 billion which can be avoided by installation of better and innovative centralizers.
  • An ideal centralizer should have maximum stand-off; ultra-high-strength; with zero weak points such as hinges, welds or mechanical interlock; with the flexibility and; restoring force suitable to absorb both axial and radial loads. It should give the lowest co-efficient of friction and should provide maximum torque reduction in open and cased hole.
  • US 4088185 disclosed a molded plastic scraper that is molded in place on the sucker rod and as a result of shrink fitting of the material is firmly held in place thereon.
  • Special configurations and materials particularly useful as and in both scrapers and centralizers are disclosed as well as additional unexpected advantages of such scrapers, configurations, and materials.
  • This invention overcomes the deficiencies of the prior art and achieves its objectives by the molding of a plastic scraper in place at one or more positions on a sucker rod whereby, as a consequence of the shrinkage of the fit and swelling of the material, a frictional grip of sufficient force to hold the scraper firmly in place under normal operating conditions is obtained with no damage or induction of stress to the sucker rod. Though, it provides a specific configuration for the multifunctional use including scrapper and centralizer. The approaches to overcome frictional issues are not disclosed.
  • US 5,908,072 disclosed a non-metallic centralizer for casing having a tubular, plastic sleeve adapted to fit closely about a joint of casing, said sleeve having a plurality of blades extending substantially longitudinally along an outer surface of said sleeve.
  • the non-metallic centralizer having strength characteristics capable of withstanding the forces encountered in casing operations.
  • the non-metallic centralizer is non-sparking for use in hazardous environments, abrasion and wears resistant, and provides protection from electrolysis between adjacent casing strings.
  • the non-metallic centralizer is light weight, allowing increased transportation capacity at an economical cost. The frictional issues during casing operations are not focused.
  • US 6,283,205 disclosed a polymeric centralizer for casing having a body adapted to fit closely about the casing, a plurality of blades extending substantially longitudinally along an outer surface of body, a slit through a blade and opposing groove to allow the centralizer to be spread apart and a fastener to pulling the slit together and tightening the centralizer about the casing.
  • the polymeric centralizer having strength characteristics capable of withstanding the forces encountered in casing operations.
  • the polymeric centralizer is non-sparking for use in hazardous environments, abrasion and wears resistant, and provides protection from electrolysis between adjacent casing strings.
  • the polymeric centralizer is light weight, allowing increased transportation capacity at an economical cost and allows easy attachment to broken down or made-up piping, production string or casing and including hole or cutaways for receiving surface cabling.
  • the main object of the invention is to provide a centralizer with low friction buttons.
  • Yet another object of the invention is to provide a centralizer wherein the buttons made up of metal alloy that are integrated in the centralizer to provide maximum retention of the buttons during expansion and contraction of the centralizer.
  • Yet another object of the invention is to provide a centralizer wherein the buttons made up of metal alloy that are integrated in the centralizer fabricated on the first contact points or within highly deviated portion of centralizer having radially outward protrusion, so as to act as the first point of contact on the centralizer.
  • Yet another object of the invention is to provide a centralizer wherein the buttons made up of metal alloy that are integrated in the centralizer fabricated on the first contact points or within highly deviated portion of centralizer having radially outward protrusion, so as to act as the first point of contact on the centralizer and reduce the start up torque while placing or extracting from a casing.
  • Yet another object of the invention is to provide a centralizer with minimum torque loss when the centralizer rubs against the sidewalls of the borehole.
  • Yet another object of the centralizer is to provide a centralizer with vastly superior torque and drag reduction due to an extremely low coefficient of friction and it can be used successfully in either open or cased-hole applications.
  • Yet another object of the invention is to provide a centralizer with that transmits high torque loads axially and radially, thereby enabling the drilling operation to be conducted efficiently.
  • the centralizer comprises first collar, second collar, a plurality of bow springs connecting the collars and specially designed button.
  • the specially designed button further comprises of metal alloy, such as stainless steel or material with similar wear properties, integrated into the centralizer, fabricated on the first contact points or within highly deviated portion of centralizer having radially outward protrusion, act as the first point of contact on the centralizer and help to reduce the wear and abrasion of the centralizer, thereby reducing the coefficient of friction and consequently reducing the torque.
  • the centralizer offers minimum co- efficient of friction and maximum torque reduction by its one piece design and materials used.
  • the centralizer provides a novel geometry which has unique placement of buttons composed of stainless steel that offers very less co efficient of friction.
  • the friction reducing stainless steel buttons are attached on the centralizer body. This reduces the co-efficient of friction between the centralizer and tubing.
  • the present invention provides a centralizer with low friction buttons.
  • the centralizers have specially designed buttons that are fabricated on the first contact points or within highly deviated portion of centralizer having radially outward protrusion, so as to act as the first point of contact on the centralizer.
  • one piece design is fabricated to give robust strength to the centralizer and the unique placement of buttons which can be made up of metal alloy such as stainless steel that helps to reduce the coefficient of friction to the minimum.
  • the buttons inserted herein are integrated in to the centralizer while fabricating, rather than being superficial attachment, this helps in retention of the buttons on sudden and vigorous expansion and contraction of the centralizer during application.
  • the term low coefficient of friction refers to a friction coefficient that ranges from 0.10-0.15 in water based mud (WBM) and 0.05 -0.10 in oil based mud (OBM).
  • the low friction buttons have slightly protruded shape that allows these buttons to have a minimal point of contact between centralizer and borehole (i.e., only the buttons touch the borehole and not the centralizer) the rest area constitute an 'air gap'.
  • the configuration, geometry and materials used in the present invention helps to reduce the start-up torque while running of the casing; minimizes the rotational torque loses and stall out effect; and enhanced rotation due to optimized centralization.
  • FIG. l is a perspective view of the centralizer in accordance with the present invention.
  • FIG. 2 is a schematic diagram elucidating the role of low friction buttons during run in the borehole.
  • the centralizer described herein may be coupled to a wellbore tubular.
  • the centralizer 100 comprises first collar 101, second collar 102, a plurality of bow springs 103 connecting the collars 101, 102.
  • Plurality of bow springs 103 further comprises a specially designed button 104 buttons made up of stainless steel or material with similar wear properties, integrated into the centralizer 100 fabricated on the first contact points or within highly deviated portion of centralizer having radially outward protrusion, so as to act as the first point of contact on the centralizer and help to reduce the wear and abrasion of the centralizer, by acting as the point of contacts and reducing the co-efficient of friction and consequently reducing the torque.
  • the collars 101 and 102, and the plurality of bow springs 103 may be formed from steel, a composite, or any other similar high strength material.
  • the centralizer 100 or its parts may be formed from one or more composite materials.
  • a composite material comprises a heterogeneous combination of two or more components that differ in form or composition on a macroscopic scale.
  • the stainless steel buttons are placed inside the collars as well.
  • a low friction button 105 is mounted on the centralizer 100, fitted closely to the outer surface of the pipe casing 104.
  • the pipe casing 104 moves in the borehole 108, in order to get itself to the total depth of the borehole.
  • the low friction button 105 touches the borehole 108 wall and help to reduce the start-up torque while running of the pipe casing 104.
  • an air cushion is formed between the bow springs and the borehole 108. In such a way, the low friction button 105, reduce drag during RIH.
  • the centralizer 100 is able to get pipe down through tangent and build sections where the friction forces are greatest due to side loading.
  • the low friction button make the lowering and running of pipe casing 104 extremely easy.
  • the holes are punched in the centralizer sheet wherein the holes are preferably oval with transverse diameter in range of 11-17 mm and longitudinal diameter in range of 13-15 mm. More particularly, the holes are punched with profile 13.5 - 14.5mm / 11.5 - 12.5 mm and counter punched with maximum limit of 16.5 mm.

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)
  • Earth Drilling (AREA)
  • Switches With Compound Operations (AREA)

Abstract

La présente invention concerne un centreur doté de boutons à coefficient de frottement réduit comprenant une pluralité de colliers comprenant un premier collier et un second collier ; une pluralité de ressorts en arc, chaque ressort en arc présentant une première extrémité et une seconde extrémité ; et une pluralité de boutons à coefficient de frottement réduit. La pluralité de ressorts en arc s'étendent entre les premier et second colliers de telle sorte que la première et la seconde extrémité de chaque ressort en arc sont raccordées aux premier et second colliers respectivement ; la pluralité de boutons à coefficient de frottement réduit sont montés sur les ressorts en arc de sorte qu'ils agissent en tant que seul point de contact entre le centreur et le trou de forage pendant le mouvement du tubage de conduite, tout en les faisant atteindre la profondeur totale pendant l'opération de forage, lesdits boutons étant du type dont le coefficient de frottement est moindre que le reste du corps du centreur.
PCT/IB2016/051572 2015-04-10 2016-03-21 Centreur doté de boutons à coefficient de frottement réduit et son procédé de fabrication Ceased WO2016162771A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1702976.0A GB2552563A (en) 2015-04-10 2016-03-21 A centralizer with low friction buttons and method of fabrication thereof
US15/507,564 US20170306708A1 (en) 2015-04-10 2016-03-21 A centralizer with low friction buttons and method of fabrication thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1011/DEL/2015 2015-04-10
IN1011DE2015 2015-04-10

Publications (1)

Publication Number Publication Date
WO2016162771A1 true WO2016162771A1 (fr) 2016-10-13

Family

ID=57073078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/051572 Ceased WO2016162771A1 (fr) 2015-04-10 2016-03-21 Centreur doté de boutons à coefficient de frottement réduit et son procédé de fabrication

Country Status (3)

Country Link
US (1) US20170306708A1 (fr)
GB (1) GB2552563A (fr)
WO (1) WO2016162771A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115478525A (zh) * 2022-08-23 2022-12-16 长江岩土工程有限公司 应用于深部地层测试的孔内标准贯入试验锤及试验方法
CN117386304B (zh) * 2023-11-22 2024-04-12 菲哲石油装备(辽宁)有限公司 一种对接式套管扶正器及其组装方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030150611A1 (en) * 2002-02-08 2003-08-14 Jean Buytaert Minimum clearance bow-spring centralizer
US6830102B2 (en) * 2000-01-22 2004-12-14 Downhole Products Plc Centraliser

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6830102B2 (en) * 2000-01-22 2004-12-14 Downhole Products Plc Centraliser
US20030150611A1 (en) * 2002-02-08 2003-08-14 Jean Buytaert Minimum clearance bow-spring centralizer

Also Published As

Publication number Publication date
GB2552563A (en) 2018-01-31
US20170306708A1 (en) 2017-10-26
GB201702976D0 (en) 2017-04-12

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