EP1253283A1 - Procédé de mise en place d'un élément tubulaire de puits - Google Patents

Procédé de mise en place d'un élément tubulaire de puits Download PDF

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Publication number
EP1253283A1
EP1253283A1 EP01303684A EP01303684A EP1253283A1 EP 1253283 A1 EP1253283 A1 EP 1253283A1 EP 01303684 A EP01303684 A EP 01303684A EP 01303684 A EP01303684 A EP 01303684A EP 1253283 A1 EP1253283 A1 EP 1253283A1
Authority
EP
European Patent Office
Prior art keywords
tubular
fluid
inner tubular
wellbore
outer tubular
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Withdrawn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
EP01303684A
Other languages
German (de)
English (en)
Inventor
Michael John Betts
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP01303684A priority Critical patent/EP1253283A1/fr
Publication of EP1253283A1 publication Critical patent/EP1253283A1/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Withdrawn legal-status Critical Current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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems

Definitions

  • the present invention relates to a method of lowering an inner tubular into an outer tubular extending into a wellbore containing a body of fluid.
  • an injector head installed at the wellhead of the wellbore.
  • the outer tubular can be, for example a production tubing or a wellbore casing.
  • the injector head exerts a mechanical force to the inner tubular so as to push the inner tubular into the outer tubular against the upward pressure of the wellbore fluid present in the outer tubular.
  • a typical situation whereby an inner tubular is lowered into an outer wellbore tubular is the running of a logging tool on coiled tubing into a producing, pressurised well.
  • a problem of the known method of lowering an inner tubular into an outer wellbore tubular is that the fluid pressure in the outer tubular acts to exert an upward force to the inner tubular.
  • the problem is even more pronounced for high-pressure wells.
  • the downward force necessary to overcome the upward force from the fluid also must be high, which has necessitated in the prior art the need for non-standard equipment applications.
  • a method of lowering an inner wellbore tubular into an outer wellbore tubular, the outer tubular containing a body of fluid comprising:
  • Fig. 1 there is shown a wellbore 1 formed into an earth formation 3 and having a lower section 4 extending into a hydrocarbon fluid containing layer 6 of the earth formation.
  • the wellbore 1 contains a body of wellbore fluid 8 and is provided with a casing 10 extending from a wellhead 8 at the earth surface 10 to the lower wellbore section 4.
  • An outer tubular in the form of production tubing 12 for the production of hydrocarbon fluid from the earth layer 6 extends from the wellhead 8 through the casing 10 to the lower wellbore section 4.
  • the tubing 12 has an open lower end and is sealed relative to the casing 10 by a production packer 14.
  • the tubing 12 is provided with an outlet 16 and a production valve 18 arranged at the wellhead 8 for controlled outflow of hydrocarbon fluid or wellbore fluid from the tubing 12 to a production facility (not shown) at surface, and with an inlet 20 connected to a pump 22 for pumping wellbore fluid into the tubing 12.
  • a subsurface safety valve (SSSV) 23 for selectively closing or opening the production tubing 12 is arranged in an upper part of the production tubing 12.
  • the SSSV has a through-bore of diameter allowing passage there through of a coiled tubing provided with a swap cup arrangement referred to hereinafter.
  • An inner tubular in the form of coiled tubing 24 stored on a reel 26 extends from the reel 26 via an injector head 28 at the wellhead 8 into the production tubing 12.
  • the coiled tubing 24 is sealed relative to the production tubing 12 by an upper annular seal 30 fixedly connected to the production tubing 12 near the upper end thereof, and by a lower annular seal in the form of swab cup arrangement 32 fixedly connected to the coiled tubing 24 near the lower end thereof.
  • the coiled tubing 24 is capable of sliding through the upper seal 30, and the swab cup arrangement 32 is capable of sliding through the production tubing 12.
  • FIG. 2 there is shown the lower part of coiled tubing 24 in more detail, indicating an inlet valve 34 arranged at the lower end 36 of the coiled tubing 24 and an outlet valve 38 arranged a short distance above the swab cup arrangement 32.
  • the inlet valve 34 is arranged to selectively allow fluid from the body of wellbore fluid 8 to enter the coiled tubing 24.
  • the outlet valve 38 is arranged to selectively allow fluid to be discharged from the coiled tubing 24 into the annular space 40 between the coiled tubing 24 and the production tubing 12.
  • the inlet valve 34 and the outlet valve 38 are controlled, for example, by means of an electrical cable extending within the coiled tubing 24 or embedded in the wall of the coiled tubing.
  • the inlet valve 34 and outlet valve 38 can be controlled by means of fluid pressure pulses induced in a body of fluid present in the coiled tubing 24 or the tubing 12.
  • hydrocarbon fluid is produced from the earth layer 6 via the production tubing 12 to the production facility at surface, whereby the coiled tubing 24 and the upper seal 30 are absent from the wellbore system and whereby the upper end of the production tubing 12 is closed by a closure member (not shown).
  • a closure member not shown
  • the closure member is replaced by the upper seal 30.
  • the coiled tubing 24 with the tool attached thereto is inserted via the injector head 28 and the upper seal 30 into the production tubing 12.
  • the production valve 18 is closed, the inlet valve 34 is opened and the pump 22 is operated to pump wellbore fluid into annular space 40 between the production tubing 12 and the coiled tubing 24.
  • the fluid pressure in the annular space 40 increases, which pressure acts on the swab cup 32 in downward direction.
  • the fluid pressure has reached a sufficiently high level the fluid pushes the swab cup 32, and consequently also the coiled tubing 24, in downward direction thereby gradually lowering the coiled tubing 24 into the production tubing 12 and unreeling the coiled tubing 24 from the reel 26.
  • the coiled tubing assembly passes through the through-bore of the SSSV 23.
  • wellbore fluid flows from the body of wellbore fluid 8 via the inlet valve 34 into the coiled tubing 24.
  • pumping is stopped, the inlet valve 34 is closed and the outlet valve 38 is opened in order to allow the fluid to be discharged from the coiled tubing 24 into the annular space 40.
  • the fluid is discharged into a suitable reservoir (not shown) via outlet valve 38, the annular space 40, and the outlet 16.
  • the outlet valve 38 is closed, the inlet valve is re-opened and pumping is resumed so as to repeat the above cycle.
  • lowering of the coiled tubing 24 is carried out in a stepwise manner whereby in each step a selected volume of wellbore fluid enters the coiled tubing, which is subsequently discharged from the coiled tubing via the annular space 40.
  • the part of the coiled tubing 24 already present in the production tubing 12 is of sufficient weight to allow further lowering of the coiled tubing 24 without assistance from the pump 22 as described above.
  • a separation plug capable of floating on the fluid flown into the coiled tubing, is inserted into the coiled tubing before lowering thereof into the production tubing.
  • the plug serves to separate an amount of a selected fluid present in the coiled tubing from the wellbore fluid which flows into the coiled tubing 24.
  • the method of the invention can also be applied for a wellbore for water production or for a geothermal wellbore.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
EP01303684A 2001-04-23 2001-04-23 Procédé de mise en place d'un élément tubulaire de puits Withdrawn EP1253283A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01303684A EP1253283A1 (fr) 2001-04-23 2001-04-23 Procédé de mise en place d'un élément tubulaire de puits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01303684A EP1253283A1 (fr) 2001-04-23 2001-04-23 Procédé de mise en place d'un élément tubulaire de puits

Publications (1)

Publication Number Publication Date
EP1253283A1 true EP1253283A1 (fr) 2002-10-30

Family

ID=8181916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01303684A Withdrawn EP1253283A1 (fr) 2001-04-23 2001-04-23 Procédé de mise en place d'un élément tubulaire de puits

Country Status (1)

Country Link
EP (1) EP1253283A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346045A (en) * 1965-05-20 1967-10-10 Exxon Production Research Co Operation in a submarine well
US3394760A (en) * 1967-03-20 1968-07-30 Exxon Production Research Co Operations in submarine and other wells
US3675718A (en) * 1970-09-11 1972-07-11 Exxon Production Research Co Conducting operations in a well through a normally closed valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346045A (en) * 1965-05-20 1967-10-10 Exxon Production Research Co Operation in a submarine well
US3394760A (en) * 1967-03-20 1968-07-30 Exxon Production Research Co Operations in submarine and other wells
US3675718A (en) * 1970-09-11 1972-07-11 Exxon Production Research Co Conducting operations in a well through a normally closed valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TAILBY R J: "PUMPDOWN ASSISTANCE EXTENDS COILED TUBING REACH", WORLD OIL, GULF PUBLISHING CO. HOUSTON, US, vol. 213, no. 7, 1 July 1992 (1992-07-01), pages 55 - 56,58,60-, XP000270024, ISSN: 0043-8790 *

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