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EP0954676A1 - Dispositif pour rincer les trous de gaz et d'huile d'un systeme d'extraction souterrain - Google Patents

Dispositif pour rincer les trous de gaz et d'huile d'un systeme d'extraction souterrain

Info

Publication number
EP0954676A1
EP0954676A1 EP98907964A EP98907964A EP0954676A1 EP 0954676 A1 EP0954676 A1 EP 0954676A1 EP 98907964 A EP98907964 A EP 98907964A EP 98907964 A EP98907964 A EP 98907964A EP 0954676 A1 EP0954676 A1 EP 0954676A1
Authority
EP
European Patent Office
Prior art keywords
nozzle body
flushing
lamellae
liner
detergent
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Withdrawn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
EP98907964A
Other languages
German (de)
English (en)
Inventor
Manfred Müller
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.)
ExxonMobil Oil Corp
Original Assignee
Mobil Oil AS
Mobil Oil Corp
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 Mobil Oil AS, Mobil Oil Corp filed Critical Mobil Oil AS
Publication of EP0954676A1 publication Critical patent/EP0954676A1/fr
Withdrawn legal-status Critical Current

Links

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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells

Definitions

  • the invention relates to a device for flushing gas and oil wells in underground mining equipment, in which the wells have been piped with a pre-perforated liner, comprising a flushing nozzle with a plurality of aligned nozzles, a nozzle body, at the front end of which the flushing nozzle and at the rear end of which a detergent line that can be inserted into the bore is arranged, the detergent line being connected to a source of detergent under hydraulic pressure.
  • the support In horizontal gas and oil wells, for reasons of rock stability and to ensure the long-term accessibility of the horizontal line with detergent line (coiled tubing, endless pipe) or rods, the support is usually piped with a liner that is perforated before installation and is not cemented.
  • a flushing nozzle on a detergent line is inserted through the existing underground conveyor equipment;
  • the largest possible outside diameter of the flushing nozzle is limited by restrictions in the underground equipment (underground safety valve, packer, landing nipple profiles), which have a significantly smaller inside diameter than the end piping.
  • the flow cross-section of the flushing can and the inner diameter of the liner remain correspondingly large.
  • a method for directionally applying high pressure jets to well casing to clean openings in the casing, liner and the adjacent geologic formation which are plugged with foreign matter is known from US Patent 5,060,725.
  • High velocity jets of liquid are used to remove plugging material rom the openings.
  • Power swivels per it rotation and Kelly hoses allow reciprocation of the jet tool and tubing string while maintaining high pressure in the apparatus.
  • a tool for washing perforations in a casing set in a well bore is known form US Patent 3,760,878. It includes a cylindrical housing having an upper port, and a lower port. The housing is connected to the lower end of a string of tubing hung from the well bore. The housing has various packers and passages so that cleaning fluid circulated down the annulus between the tubing string and casing flows in through the first port and out the second port through perforations at the same level as the second port. The cleaning fluid return through lower perforations in the casing carrying sand or other plugging material with it and is returned up the tubing string.
  • the object of the invention is, on the one hand, to ensure in a device of the type mentioned at the outset that the washing liquid actually reaches the intended areas and that the nozzle body can be moved in both directions during the introduction of the washing liquid.
  • the segments go back to the original outer diameter and the device can be removed due to the restrictions. Since the divers are made of metal, they are not subject to any significant wear; “Activating the diverters can therefore be repeated any number of times by changing the pumping rate.
  • the device can also be operated while pumping, as it is not fixed in the liner despite the activated diverter.
  • FIG. 1 shows a device according to the invention in a sectional view, the slats being shown in the retracted position.
  • Fig. 2 shows the corresponding representation with the slats extended.
  • a nozzle body l ⁇ is shown, at the upper end of a screw 12 is attached, which in turn is connected to the detergent or dishwasher line, not shown.
  • the front end of the nozzle body 11 there is a nozzle head 10 with a plurality of aligned nozzles.
  • washing liquid can be fed via a pressure medium source via the detergent line and via the screw connection 12 into the interior of the Nozzle body 11 are guided under sufficiently high pressure so that the detergent emerges from the nozzles of the nozzle body 10.
  • FIGS. 1 and 2 further parts are provided on the nozzle body according to the invention, namely a total of six fins distributed over the circumference, only two of which are shown in FIGS. 1 and 2 and which have reference numbers 13 there.
  • These lamellae 13 are attached to a basket 15 in such a way that they want to assume an outwardly spread position, such as that shown in FIG.
  • the slats cannot assume this position in the operating position according to FIG. 1 because they are surrounded by a sleeve 14.
  • the sleeve can be moved back and forth on the nozzle body 11 and is conically equipped at its free end on the inside, so that, with a relatively small outside diameter, the fins 13 assume the position shown in FIG.
  • the sleeve 14 is arranged via two seals on the nozzle body 11 such that detergent can also act on a part projecting in the opposite direction, which can best be seen in FIG. 2, via a transverse bore from the interior of the nozzle body 11.
  • the washing liquid exerts a force on the sleeve 14, so that the sleeve 14 changes from the position shown in FIG. 1 to the position shown in FIG. 2.
  • the lamellae 13 can spread outwards and, as shown in FIG. 2, lie against the inner wall of the borehole or the liner.
  • the desired barrier of the space behind the nozzle body is created, so that the emerging washing and rinsing liquid enters the space in front of the nozzle body, but practically not in the space behind the nozzle body.
  • a spiral 16 is provided on the nozzle body 11, which ensures that the sleeve 14 is in the forward-facing position, as shown in FIG. 1 , occupies.
  • the pressure of the washing liquid is so high that the sleeve 14 moves back against the force of the spring and compresses the spring. If the detergent pressure then decreases again, the spring 16 can return the sleeve to the position shown in FIG. 1.

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)
  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un dispositif pour rincer les trous de gaz et d'huile d'un système d'extraction souterrain, dans lequel les trous ont été tubés avec un revêtement préperforé. Ce dispositif comporte un ajutage de rinçage avec une pluralité d'ajutages alignés, un corps d'ajutage, à l'extrémité avant duquel est montée la buse de rinçage, une conduite d'agent de rinçage insérable dans le trou étant montée à l'extrémité arrière. La conduite d'agent de rinçage est raccordée à une source d'agent de rinçage sous pression hydraulique. Sur le corps d'ajutage (11), il est prévu une pluralité de languettes ou de lamelles (13) réparties sur la périphérie, qui écartées vers l'extérieur pendant le rinçage, diminuent la section annulaire entre le corps d'ajutage (11) et la paroi du trou ou du revêtement perforé.
EP98907964A 1997-01-23 1998-01-21 Dispositif pour rincer les trous de gaz et d'huile d'un systeme d'extraction souterrain Withdrawn EP0954676A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1997102197 DE19702197C1 (de) 1997-01-23 1997-01-23 Vorrichtung zum Spülen von Gas- und Ölbohrungen einer Untertage-Förderausrüstung
DE19702197 1997-01-23
PCT/EP1998/000298 WO1998032949A1 (fr) 1997-01-23 1998-01-21 Dispositif pour rincer les trous de gaz et d'huile d'un systeme d'extraction souterrain

Publications (1)

Publication Number Publication Date
EP0954676A1 true EP0954676A1 (fr) 1999-11-10

Family

ID=7818065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98907964A Withdrawn EP0954676A1 (fr) 1997-01-23 1998-01-21 Dispositif pour rincer les trous de gaz et d'huile d'un systeme d'extraction souterrain

Country Status (5)

Country Link
EP (1) EP0954676A1 (fr)
CA (1) CA2278126A1 (fr)
DE (1) DE19702197C1 (fr)
NO (1) NO993545L (fr)
WO (1) WO1998032949A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2190762C2 (ru) * 2000-01-26 2002-10-10 Общественная организация "Фонд содействия горному искусству" Способ обработки призабойной зоны продуктивного пласта
RU2561220C1 (ru) * 2014-02-07 2015-08-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") Струйная установка для промывки скважин

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760878A (en) * 1972-03-16 1973-09-25 Amoco Prod Co Perforations washing tool
US4267888A (en) * 1979-11-15 1981-05-19 Mortimer Singer Method and apparatus for positioning a treating liquid at the bottom of a well
US4441557A (en) * 1980-10-07 1984-04-10 Downhole Services, Inc. Method and device for hydraulic jet well cleaning
US4625799A (en) * 1985-06-19 1986-12-02 Otis Engineering Corporation Cleaning tool
US5060725A (en) * 1989-12-20 1991-10-29 Chevron Research & Technology Company High pressure well perforation cleaning

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9832949A1 *

Also Published As

Publication number Publication date
DE19702197C1 (de) 1998-09-03
NO993545D0 (no) 1999-07-19
NO993545L (no) 1999-07-19
CA2278126A1 (fr) 1998-07-30
WO1998032949A1 (fr) 1998-07-30

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19990624

AK Designated contracting states

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Designated state(s): DE FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: EXXONMOBIL OIL CORPORATION

STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 20020801