WO2012004235A2 - Procédé pour empêcher les fuites de matières polluantes lors de forages sous-marins et train de tiges correspondant - Google Patents

Procédé pour empêcher les fuites de matières polluantes lors de forages sous-marins et train de tiges correspondant Download PDF

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Publication number
WO2012004235A2
WO2012004235A2 PCT/EP2011/061266 EP2011061266W WO2012004235A2 WO 2012004235 A2 WO2012004235 A2 WO 2012004235A2 EP 2011061266 W EP2011061266 W EP 2011061266W WO 2012004235 A2 WO2012004235 A2 WO 2012004235A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
string
tubing
pipe string
cutting shoe
Prior art date
Application number
PCT/EP2011/061266
Other languages
German (de)
English (en)
Other versions
WO2012004235A3 (fr
Inventor
Helmut Derwand
Original Assignee
Helmut Derwand
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 Helmut Derwand filed Critical Helmut Derwand
Priority to DE112011102303T priority Critical patent/DE112011102303A5/de
Publication of WO2012004235A2 publication Critical patent/WO2012004235A2/fr
Publication of WO2012004235A3 publication Critical patent/WO2012004235A3/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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/0122—Collecting oil or the like from a submerged leakage
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • 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
    • E21B17/01—Risers

Definitions

  • the invention relates to a method for preventing the escape of environmentally harmful substances in wells for recovering oil and gas in submerged formations.
  • the invention further relates to large pipes for producing a pipe string for carrying out the method.
  • the invention has for its object to provide a method which provides greater security against the escape of environmentally harmful substances when drilling in submerged formations.
  • the method comprises the following steps:
  • the cutting shoe and the lower end of the tubing surround an area surrounding the borehole at the bottom of the water or the sea and any facilities there including blowout preventer and riser pipe.
  • the method according to the invention offers the advantageous possibility of arranging a device for outbreak prevention at the upper end of the pipe string and thus over water.
  • the method according to the invention is equally suitable for combating an accident in a subsea drilling system, for example by breaking a Bohroder conveyor line.
  • the pipe string from large pipes can be drained above the damaged area and guided with the aid of robot and camera in such a way that the cutting shoe surrounds the damaged area.
  • the cutting shoe deposited at the accident site is then pressed into the pending seabed by the weight of the pipe string or part thereof.
  • the internal pressure is then lowered by lowering the level in the tubing by about 2 to 3 bar, which can no longer flow into the open sea at the disaster point emerging oil, but rises within the tubing and can be pumped off together with inflowing water.
  • the large pipes of the pipe string are limited axially movable connected to each other. This ensures that even with a ground fault on the seabed, the cutting shoe of the pipe string can automatically reset. Furthermore, the load of the cutting shoe can be varied with the aid of the movable connection by means of defined lowering of the upper end of the tubing string held by the floating body.
  • At least a part of the pipes of the pipe string can be connected to a buoyant body. Furthermore, it can be provided that the upper end of the pipe string is movably mounted on the floating body in the vertical direction. As a result, vertical movements of the float can be compensated by sea state and thereby limited forces on the pipe string can be limited.
  • large pipes which comprise an outer pipe, an inner pipe concentrically arranged in the outer pipe and pressure-tightly connected at its ends to the outer pipe by ring walls, and a pipe formed between the outer pipe and the inner pipe hollow annulus have.
  • the large pipes thus constructed have a high rigidity and thus withstand high pressure and bending loads.
  • the hollow annulus forms a buoyant body which reduces the tube weight in the water to about 80%.
  • the annular space can according to the invention have valves for flooding and emptying. By completely or partially flooding the annulus with water, the tube weight can be increased more or less. This also makes it possible to change the load on the cutting shoe.
  • the inner tube with the outer tube connecting stiffeners are arranged.
  • the stiffeners may consist of extending parallel to the tube axis strips or profiles.
  • the large pipe at its pipe ends matching counterparts of a pipe connector wherein the one pipe end has a pipe sleeve and the other pipe end connectable with such a pipe socket pipe spigot and the pipe sleeve on its inside and the pipe pin on its outside in the same Separation distance from one another along a circumferential line have a plurality of support elements, which cooperate in the manner of a bayonet connection with the support elements of a correspondingly shaped pipe pin or a correspondingly shaped pipe sleeve to connect the respective pipe end with a matching counterpart at the pipe end of a second appropriately designed large pipe.
  • the pipe connector according to the invention in the axial direction on a movement play, which can be up to several centimeters. Due to the play of movement of the pipe connector, the axial length of the pipe string can vary and thereby compensate settlement of the cutting shoe and vertical movements of the float.
  • a tubular cutting shoe is arranged with a circular cutting edge.
  • the cutting shoe which consists of a thick-walled pipe, preferably has an inner diameter which is at least equal to the inner diameter of a large pipe connected to the cutting shoe.
  • FIG. 1 shows an application example of the method and the device according to the invention
  • FIG. 2 shows a side view of a large pipe according to the invention and FIG. 3 shows an end view of the large pipe according to FIG. 2,
  • FIG. 4 shows another example of the method
  • the oil and gas emerging from a production well bore at a marine site on the seabed are collected by means of the method according to the invention and controlled to be transported overground, where it can be disposed of in the usual way or further processed.
  • a float 1 such as a pontoon or ship
  • a keel tube 2 of the float 1 on the float 1 with the aid of suitable facilities gradually from large pipes 3 composite pipe string 4 using suitable lifting devices to a failure point 5 on the seabed. 6 lowered.
  • a cutting shoe 7 is arranged, which consists of a thick-walled tube having the same outer diameter as the large pipes and an inner diameter which is larger than the inner diameter of the large pipes.
  • a cutting shoe with larger dimensions e.g. in the manner of a bell, are used when a larger area is to be covered at the accident location of the cutting shoe.
  • the cutting shoe 7 has at its lower end an inlet opening which is surrounded by a cutting edge formed by its wall.
  • the large pipes 3 hang with their reduced by buoyancy weight to each other, which sets due to the design of the pipe connector at the joints a maximum axial play, which may be a few millimeters or centimeters depending on the design.
  • the cutting shoe 7 is guided by means of robots and underwater cameras so that it passes over the damaged area 5. If the cutting shoe 7 deposited on the seabed 6, it is burdened by further lowering the tubing 4 with the weight of a series of large pipes 3, which gradually put on each other, the axial clearance disappears at the joints. As a result of this load, the cutting shoe 7 penetrates deeper into the seabed 6 and thereby closes the damaged area 5 better. In addition, the inflow of water is counteracted.
  • the holding of the tubing string 4 on the floating body 1 can be done with the aid of a hydraulic interceptor 1 4, which operates semi-automatically and is similar to a wedge pot formed in a rotary table.
  • a hydraulic interceptor 1 4 which operates semi-automatically and is similar to a wedge pot formed in a rotary table.
  • the interceptor 14 is automatically closed.
  • the pipe string 4 holding support device 14 is advantageously supported by means of springs 15 movable in the vertical direction, so that vertical movements of the float 1 can be compensated.
  • Other, for example, hydraulic devices for compensating movement can also be provided.
  • the large pipe 3 shown in FIGS. 2 and 3 for forming the pipe string 4 has a cylindrical outer pipe 30 and a cylindrical inner pipe 31 arranged concentrically therein.
  • the longer outer tube 30 is connected to the inner tube 31 with conical annular walls 32 arranged at the ends of the inner tube 31.
  • Between the outer tube 30 and the inner tube 31 is an annular space 33 in which pairs of stiffening strips 34 are arranged at a regular circumferential distance. Each pair has two V-shaped stiffening strips 34, which are arranged so that they extend from a common attachment point on the inner tube 31 from diverging to two attachment points on the outer tube 30.
  • the stiffening strips 34 extend in the longitudinal direction parallel to the axis of the tubes and have the same length as the inner tube 31st
  • the lower end in the drawing of the outer tube 30 is extended beyond the annular wall 32 and forms with the extended portion of a pipe sleeve 35, which is provided on its inside a plurality of rectangular support members 36 which are arranged at a regular distance from each other and about their Have circumferential length corresponding distance from each other.
  • a support ring Adjacent to the annular wall 32, a support ring is further secured in the pipe sleeve 35, which has a distance from the support elements 36.
  • a pipe section 37 is inserted, which forms a protruding from the outer tube 30 pipe spigot 38.
  • the pipe spigot 38 is on its outside in the same way as the pipe socket 35 with a multiplicity of parallelepipedal support elements 39 which are at the same distance from each other as the support elements 36 and can be pushed back between the support elements 36.
  • the two ends of the large pipe 3 are provided with matching counterparts of a pipe connector, which can be connected by axial nesting and mutual rotation by a distance corresponding to the distance between the support members 36, 39, as described in detail in EP 0 705 405 B1 ,
  • the connection position is locked by a securing element that can be mounted from the outside through a window 40 in the pipe sleeve 35.
  • the annular walls 32 each have an opening 41, in which a flood valve or a drain valve is used or which can be closed with a stopper. If the annular space 33 remains empty, it forms a buoyant body, which reduces the weight of the pipe in the water. If the effect of the buoyant body omitted or reduced, the annulus can be completely or partially filled with water via the valves used.
  • Figure 4 shows an application of the method and associated apparatus to a deep well at the bottom of a sea or inland water. The process has the task of protecting the sea or inland waters from contamination by the drilling process and possible damage to the drilling or conveying equipment.
  • a tubing string 4 of large pipes 3 is lowered from a floating body 1 to the ground to be drilled and anchored to the bottom of the pipe string cutting shoe 7 in the ground by ramming. If required, the anchoring of the cutting shoe 7 with the lower pipe end can be done additionally by cementing. If the pipe string 4 is sunk and anchored, the water level in the pipe string 4 is lowered by a few meters below the water level of the surrounding water body by a lowered into the tubing 4 submersible pump 8 and held at this lowered level.
  • drill pipes such as a riser strand 20 and a drilling or production string 21, can now be guided to the lower anchoring end of the pipe string 4.
  • the riser strand 20 can be anchored in the usual way in the bottom of the well or by means of a suitable latching device in the lower end of the tubing 4. With the help of the drill string 21 having at its lower end a drill bit and possibly a drill motor, then the sinking of the deep hole.
  • the drill pipes are passed through a cover plate 16 which is mounted on the upper Rohrstrangende.
  • the cover plate 16 has a guide tube 1 7, in which the riser strand 20 is guided and supported.
  • a device 22 for outbreak prevention (blowout preventer) is arranged, which closes the end of the riser strand 20 and forms a secure passage for the drill string 21.
  • This arrangement of the device 22 is due to the protected arrangement of the drill pipes within the tubing 4 allows. It has the advantage of easy and inexpensive installation, maintenance and control of the device 22, which increases safety.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un procédé pour empêcher les fuites de matières polluantes lors de forages pour extraire du pétrole ou du gaz dans des formations subaquatiques, comprenant les étapes qui consistent : à produire un train de tiges (4) au moyen de tubes à grand diamètre et un sabot tranchant tubulaire (7) à l'extrémité inférieure du train de tiges (4), faire descendre le train de tiges (4) maintenu par un corps flottant (1) et pourvu du sabot tranchant (7) jusqu'à la formation, au fond (6) de l'eau, introduire le sabot tranchant (7) dans la formation par application de charge, insérer une pompe submersible (8) dans le train de tiges (4) et abaisser la pression interne dans ce train de tiges par réduction continue du niveau sous le niveau de l'eau entourant le train de tiges et récupérer l'eau pompée dans un récipient (12).
PCT/EP2011/061266 2010-07-09 2011-07-05 Procédé pour empêcher les fuites de matières polluantes lors de forages sous-marins et train de tiges correspondant WO2012004235A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112011102303T DE112011102303A5 (de) 2010-07-09 2011-07-05 Verfahren zum Verhindern des Austritts von umweltschädlichen Stoffen bei Unterwasserbohrungen und Rohrstrang hierfür

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010036323A DE102010036323A1 (de) 2010-07-09 2010-07-09 Verfahren zum Verhindern des Austritts von umweltschädlichen Stoffen bei Unterwasserbohrungen und Rohrstrang hierfür
DE102010036323.5 2010-07-09

Publications (2)

Publication Number Publication Date
WO2012004235A2 true WO2012004235A2 (fr) 2012-01-12
WO2012004235A3 WO2012004235A3 (fr) 2013-01-10

Family

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PCT/EP2011/061266 WO2012004235A2 (fr) 2010-07-09 2011-07-05 Procédé pour empêcher les fuites de matières polluantes lors de forages sous-marins et train de tiges correspondant

Country Status (2)

Country Link
DE (2) DE102010036323A1 (fr)
WO (1) WO2012004235A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2543832C1 (ru) * 2013-10-21 2015-03-10 Юлия Алексеевна Щепочкина Колонна

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108612644B (zh) * 2016-12-12 2019-10-11 中国石油天然气股份有限公司 抽油机井套管内加压流体的装置
DE102022107341A1 (de) 2022-03-29 2023-10-05 Werner Zimmer Erdbauvorrichtung, Rohrabschnitt und Erdbauverfahren

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0705405B1 (fr) 1993-06-26 1996-12-27 Preussag Anlagenbau Gmbh Puits etaye avec des conduits de grand diametre
DE19721635C2 (de) 1997-05-23 2002-05-08 Preussag Spezialtiefbau Gmbh Vorrichtung zum Ziehen einer Rohrtour

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681923A (en) * 1969-04-28 1972-08-08 Winfield H Hyde Method and apparatus for controlling subnatant oil seepage
US4283159A (en) * 1979-10-01 1981-08-11 Johnson Albert O Protective shroud for offshore oil wells
WO1983001471A1 (fr) * 1981-10-16 1983-04-28 Milgram, Jerome, H. Collecteur de separation pour eruptions sous-marines
DE4332690A1 (de) * 1993-09-25 1995-04-27 Blank Karl Heinz Verfahren zum Regenerieren und/oder Pflegen von Brunnen und Vorrichtung zur Durchführung des Verfahrens
US6142236A (en) * 1998-02-18 2000-11-07 Vetco Gray Inc Abb Method for drilling and completing a subsea well using small diameter riser
US6412562B1 (en) * 2000-09-07 2002-07-02 Baker Hughes Incorporated Electrical submersible pumps in the riser section of subsea well flowline

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0705405B1 (fr) 1993-06-26 1996-12-27 Preussag Anlagenbau Gmbh Puits etaye avec des conduits de grand diametre
DE19721635C2 (de) 1997-05-23 2002-05-08 Preussag Spezialtiefbau Gmbh Vorrichtung zum Ziehen einer Rohrtour

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2543832C1 (ru) * 2013-10-21 2015-03-10 Юлия Алексеевна Щепочкина Колонна

Also Published As

Publication number Publication date
DE102010036323A1 (de) 2012-01-12
WO2012004235A3 (fr) 2013-01-10
DE112011102303A5 (de) 2013-04-25

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