EP3150794A1 - Centering device with modular structure for casings of wells for the production of hydrocarbons and casing provided with said centering device - Google Patents

Centering device with modular structure for casings of wells for the production of hydrocarbons and casing provided with said centering device Download PDF

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Publication number
EP3150794A1
EP3150794A1 EP16190933.8A EP16190933A EP3150794A1 EP 3150794 A1 EP3150794 A1 EP 3150794A1 EP 16190933 A EP16190933 A EP 16190933A EP 3150794 A1 EP3150794 A1 EP 3150794A1
Authority
EP
European Patent Office
Prior art keywords
centering device
elements
centering
wells
casings
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Withdrawn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
EP16190933.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Luca TROMBI
Giorgio Girola
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.)
Joint Energy Investments SA
Original Assignee
Joint Energy Investments SA
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 Joint Energy Investments SA filed Critical Joint Energy Investments SA
Publication of EP3150794A1 publication Critical patent/EP3150794A1/en
Withdrawn legal-status Critical Current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
    • E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes

Definitions

  • the present invention concerns a centering device having a modular structure, utilized for casings of wells for the production of hydrocarbons.
  • Wells for the extraction of hydrocarbons comprise a metal pipe, called casing, cemented to the walls of the borehole.
  • the casing generally extends between the surface or well head area and the bottom or mineralized area (bottom).
  • the quality of the distribution of liquid mortar obtained between the casing and the borehole is crucial to ensure containment of the pressure of the fluids imposed on the site and to avoid the undesirable migration of these fluids during the production life of the well.
  • the centering of the casing in a coaxial position with respect to the wellbore is an essential element to ensure optimal distribution of the mortar in the gap between the wellbore and the casing.
  • centering devices Based on the more or less irregular profile of the well, but also according to the more or less slanted trajectory of this latter, it is often necessary to provide centering devices of different lengths, so as to optimize centering and sliding of the casing during its descent into the well. Therefore, for example, in the case of wells with a considerably slant or with a highly irregular profile, it is preferable to use centering devices that are longer than conventional devices, to ensure regular descent of the casing to the bottom of the well.
  • known centering devices are distinguished by the fact that they have a monolithic, or one piece, structure, which for this reason has a fixed size that can no longer be modified. Consequently, the size of the conventional centering device, once manufactured, cannot be modified or changed, to adapt it to the operating conditions of the well, directly at the time of installing the casing. Therefore, it is currently necessary to have the same number of centering devices as the number of different lengths required by the many different operating conditions of the well.
  • the main object of the present invention is to provide a new centering device for casings of wells for the production of hydrocarbons which, with respect to known centering devices, allows the conventional problems of cost and storage of centering devices of different length to be effectively solved.
  • Another object of the invention is to provide a centering device with a length that can be changed rapidly and instantly, making it immediately available for installation on the casing, according to the site requirements occurring directly at the well site.
  • a further object of the invention is to provide a casing provided with centering devices, the sizes of which are adapted time by time to the geometric conditions of the extraction well, directly at the time of their use.
  • the object of the invention is also to provide a centering device, provided with a friction element that can be replaced according to the geometry and to other formation characteristics of the well.
  • the centering device of the invention In relation to known centering devices for casings, with the device of the invention the centering device with the most suitable length for the specific operating needs encountered at the site can be produced directly on site and at the time use. Due to this possibility, offered by the modular structure of the centering device of the invention, there is no longer the traditional need to provide, on site, centering devices already preformed with the different lengths required case by case, and therefore using only part of all those in stored in the warehouse.
  • the invention also solves the problem of lack of availability, at the time of use, of centering devices with sizes suitable for their use on the specific drilling site.
  • the device of the invention also has the advantage of allowing, directly at the time of use and at the well site, the material of its contact surface with the wall of the well or with the wall of the pre-existing casing to be selected from those most suitable for the geometric conditions of the well.
  • the centering device of Figs. 1 and 2 indicated as a whole with 1, has a modular structure with two head elements, respectively 2 and 3, which can be mutually coupled at dovetail joints, respectively male 4,5 and female 6,7.
  • assembly of the device 1 is obtained by coupling the two elements 2 and 3 in the direction of the arrow F, so as to engage the male parts 4 and 5 in the respective female sections 6 and 7.
  • the modular structure of the centering device of the invention allows the head elements 2 and 3 of Fig. 1 to be integrated, rapidly and simply directly at the well site, with the intermediate extension element 8 of Figs. 4 and 5 .
  • coupling of the aforesaid elements 2, 8 and 3, advantageously of modular type, is obtained using the dovetail joints 4,5,6,7 of the head elements 2 and 3, and the analogous joints of the intermediate extension element 8, respectively male 9 and female 10 on the head element 2 side, and male 11 and female 12 on the head element 3 side of the centering device.1.
  • the head elements 2 and 3 of the centering device of the invention have respective shaped seats 14 and 15, suitable to accommodate the corresponding portions of a friction element 16, or the outermost part of the centering device, which is the part destined to come into rubbing contact with the walls of the well or with the walls of a pre-existing casing.
  • the friction element 16 is inserted in a specific seat obtained in the outer wall of the body of the centering device.
  • an adhesive, a forced coupling and the like can be used to secure the aforesaid element 16 in its seat in the body of the centering device ( Fig. 10 ). In this way, it is possible to easily change the friction element equipped on the centering device, choosing from those most suitable for the conditions of the well and replacing it directly at the time of use.
  • the device of the invention is integrated with two friction elements 16 and 17.
  • the friction element 16 is housed in the seat 14 of the head element 2 and in the seat 18 of the extension element 8 of the centering device of the invention.
  • the friction element 17 is instead positioned interlocking with the seat 15 of the head element 3 and with the seat 19 of the same intermediate element 8.
  • the aforesaid intermediate element 8 has two distinct seats 18 and 19, separated from each other by a diaphragm 20 for housing the different friction elements 16 and 17.
  • the centering device of the invention is installed on the outer surface of the casing 21 of Fig. 13 , housed in the gap 22 that separates the outer surface of the casing 21 from the wall 23 of the well.
  • the number of the intermediate extension elements 8 could be greater than those illustrated and there could be different versions of the joints used for coupling, both to one another and to the head elements 2 and 3, and also to the friction elements 16 and 17.
  • the diaphragm 20 that separates the seats 18 and 19 of the intermediate element 18 of Fig. 11 could be omitted.

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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)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Earth Drilling (AREA)
EP16190933.8A 2015-09-30 2016-09-27 Centering device with modular structure for casings of wells for the production of hydrocarbons and casing provided with said centering device Withdrawn EP3150794A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2015A004019A ITUB20154019A1 (it) 2015-09-30 2015-09-30 Dispositivo centratore a struttura componibile per casing di pozzi per la produzione di idrocarburi e casing provvisto di questo dispositivo centratore

Publications (1)

Publication Number Publication Date
EP3150794A1 true EP3150794A1 (en) 2017-04-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16190933.8A Withdrawn EP3150794A1 (en) 2015-09-30 2016-09-27 Centering device with modular structure for casings of wells for the production of hydrocarbons and casing provided with said centering device

Country Status (2)

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EP (1) EP3150794A1 (it)
IT (1) ITUB20154019A1 (it)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594550A (en) * 1950-03-15 1952-04-29 Gist Fred Morgan Multisection pipe protector
US3566965A (en) * 1968-07-22 1971-03-02 B & W Inc Variable size,multi-hinge centralizer
US4641776A (en) * 1983-10-31 1987-02-10 Baker Oil Tools, Inc. Segmented concentric centralizer
US20030010540A1 (en) * 2000-01-22 2003-01-16 Kirk Ian Alastair Centraliser
US20070215388A1 (en) * 2004-03-26 2007-09-20 Kirk Lan Alastair Downhole Apparatus for Mobilising Drill Cuttings
US20080156488A1 (en) * 2000-06-30 2008-07-03 Brunel Oilfield Services (Uk) Limited Downhole Tools
US20110203852A1 (en) * 2010-02-23 2011-08-25 Calnan Barry D Segmented Downhole Tool
US20120125689A1 (en) * 2010-11-24 2012-05-24 Caledus Limited Drill Pipe Tubing and Casing Protector
GB2517167A (en) * 2013-08-13 2015-02-18 Advanced Composite Ind Ag Centraliser

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594550A (en) * 1950-03-15 1952-04-29 Gist Fred Morgan Multisection pipe protector
US3566965A (en) * 1968-07-22 1971-03-02 B & W Inc Variable size,multi-hinge centralizer
US4641776A (en) * 1983-10-31 1987-02-10 Baker Oil Tools, Inc. Segmented concentric centralizer
US20030010540A1 (en) * 2000-01-22 2003-01-16 Kirk Ian Alastair Centraliser
US20080156488A1 (en) * 2000-06-30 2008-07-03 Brunel Oilfield Services (Uk) Limited Downhole Tools
US20070215388A1 (en) * 2004-03-26 2007-09-20 Kirk Lan Alastair Downhole Apparatus for Mobilising Drill Cuttings
US20110203852A1 (en) * 2010-02-23 2011-08-25 Calnan Barry D Segmented Downhole Tool
US20120125689A1 (en) * 2010-11-24 2012-05-24 Caledus Limited Drill Pipe Tubing and Casing Protector
GB2517167A (en) * 2013-08-13 2015-02-18 Advanced Composite Ind Ag Centraliser

Also Published As

Publication number Publication date
ITUB20154019A1 (it) 2017-03-30

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