WO2013026256A1 - Dispositif de mise sous pression en fond de trou - Google Patents

Dispositif de mise sous pression en fond de trou Download PDF

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Publication number
WO2013026256A1
WO2013026256A1 PCT/CN2012/000834 CN2012000834W WO2013026256A1 WO 2013026256 A1 WO2013026256 A1 WO 2013026256A1 CN 2012000834 W CN2012000834 W CN 2012000834W WO 2013026256 A1 WO2013026256 A1 WO 2013026256A1
Authority
WO
WIPO (PCT)
Prior art keywords
downhole
cavity
pressurization
casing
pressurized
Prior art date
Application number
PCT/CN2012/000834
Other languages
English (en)
Chinese (zh)
Inventor
于连杰
张松峰
汪恩宝
武强
张�林
魏向辉
Original Assignee
中国石油天然气集团公司
中国石油集团渤海石油装备制造有限公司
渤海石油装备（天津）中成机械制造有限公司
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 中国石油天然气集团公司, 中国石油集团渤海石油装备制造有限公司, 渤海石油装备（天津）中成机械制造有限公司 filed Critical 中国石油天然气集团公司
Publication of WO2013026256A1 publication Critical patent/WO2013026256A1/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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
    • 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
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems

Definitions

  • the invention relates to a device for improving the circulation speed of a downhole circulation in a petroleum natural gas drilling operation, in particular to a downhole supercharging device for oil drilling.
  • the circulation pressure is only 9 ⁇ 12MPa ; when the well depth reaches 6000m, the pressure is basically exhausted along the path. . Therefore, the deeper the well, the smaller the pressure drop of the bottom hole, the lower the ability of the drilling fluid to wash and sand the bottom of the well, and greatly reduce the drilling efficiency.
  • the Downhole Supercharger (Patent No. 94103752.5) is a volumetric multi-cylinder hydraulic supercharger driven by a mechanical reversing mechanism, which adopts a gear-driven reversing mechanism.
  • the structure is complex, the manufacturing is difficult, and the cost is large.
  • China utility model patent "an oil drilling downhole turbocharger" (patent number 01216627.8), installed between the bottom hole power drill and the drill bit, it can improve the bottom hole liquid pressure without changing the ground pump pressure More than 5 times.
  • a bottom-hole power drill uses a ram-type multi-cylinder hydraulic boosting design consisting of a swash plate, multiple booster cylinders, a plunger, a liquid flow path, a check valve, and a load-bearing casing.
  • the spherical chute on the swash plate connected to it is also rotated at the same speed at a high speed, thereby driving the plunger to reciprocate in the booster cylinder to generate high-pressure liquid through the ultra-high pressure.
  • the pipeline is discharged from the drill nozzle to achieve high pressure jet drilling to increase the drilling speed. Due to the use of plunger multi-cylinder hydraulic pressurization The structure is also complicated and the service life is short.
  • the object of the present invention is to provide a downhole pressurizing device which overcomes the disadvantages of complicated structure, high manufacturing difficulty and high cost of the booster used in the existing oil drilling operation.
  • the downhole supercharging device of the present invention comprises a casing and a drill pipe string, wherein the drill pipe string is located in the casing, and a boosting pipe column is arranged between the casing and the drill pipe string, and the inner hole of the pressurized pipe column is
  • the outer circumference of the drill pipe string is an annulus, and the outer circle of the pressurized pipe column and the inner hole of the casing are annulus.
  • the upper pressurizing sleeve, the cavity and the lower pressurizing sleeve of the pressurized tubular column are fixedly connected from top to bottom, and a packer is installed on the lower pressurizing sleeve below the cavity for sealing the pressurized tubular string and The annular space of the casing; the pressurized water eye is fixedly mounted on the cavity, and the pressurized water eye communicates with the annulus inside and outside the cavity.
  • the outer circle of the cavity is a stepped axis with a small middle and large end at both ends, and the upper end of the large shaft diameter is a small upper and lower cone; the inner hole of the large axial diameter of the cavity is a conical hole with a small upper and a lower; the large axis of the cavity
  • the lower end surface of the diameter is uniformly fixedly installed with two or more pressurized water eyes, and the angle between the axis of the pressurized water eye and the axis of the cavity is ⁇ 45°, and the upper end of the pressurized water eye and the inner cone of the cavity The same.
  • Two or more superchargers are installed in series.
  • FIG. 1 is a schematic view showing the structure of a downhole pressurizing device of the present invention and its working principle.
  • the downhole pressurizing device of the present invention comprises a casing 7, a boosting pipe string 10, a drill pipe string 4, and is installed from the outside to the inside, and a ring is formed between the inner hole of the pressurized pipe column 10 and the outer circumference of the drill pipe string 4.
  • the upper and lower ends of the cavity 1 of the pressurized tubular column 10 are fixedly connected with a pressurized casing 3, and the lower pressurized casing below the cavity 1 is mounted with a packer 9 for sealing the pressurized column 10 and the sleeve.
  • the annulus between the tubes 7 is empty.
  • a pressurized water eye 2 is fixedly mounted on the cavity 1, and the pressurized water eye 2 communicates with the annulus inside and outside the cavity 1.
  • the outer circumference of the cavity 1 is a stepped shaft having a small intermediate portion at both ends, and the upper end portion of the large shaft diameter is a small upper and lower cone; the inner hole corresponding to the middle portion of the large shaft diameter is a tapered hole having a small upper and a lower;
  • the conical taper angles inside and outside the cavity 1 are substantially the same.
  • the lower end surface of the large shaft diameter of the cavity 1 is uniformly fixed to the circumference by two or more pressurized water eyes 2, and usually four pressurized water eyes 2 are installed. There should be an angle between the axis of the pressurized water eye 2 and the axis of the cavity 1 with an angle of 45° and an optimum angle of the angle of 25 to 30°.
  • the upper end of the pressurized water eye 2 communicates with the inner tapered hole of the cavity 1.
  • the outer surface of the cavity 1 on which the pressurized water eye 2 is installed is processed into a lug shape, which can increase the liquid flow rate of the outer circumference of the pressurized column 10 and the inner ring of the casing 7.
  • the surface of the cavity 1 may be reinforced.
  • the drilling fluid entering the drilling string 4 enters the annulus between the drilling string 4 and the pressurized tubular column 10 when returning through the drilling fluid passage 5.
  • the separator 9 Under the action of the separator 9, there is a pressure difference between the outer drilling fluid and the inner drilling fluid, and the outer drilling fluid enters the inner drilling fluid passage 6 through the water eye installed on the cavity 1, accelerating the return of the drilling fluid. , to improve the circulation speed and sand carrying capacity of the entire inner drilling fluid, to achieve the purpose of improving drilling efficiency.
  • two or more superchargers can be installed in series according to the needs of the drilling operation, thereby achieving the purpose of strong pressurization.
  • the downhole supercharging device of the invention has the advantages of simple structure and reasonable design, can increase the circulation speed of the well T liquid and improve the rock breaking and sand carrying capacity without changing the rated pressure of the ground pumping system. Improve drilling efficiency, reduce drilling costs, and increase the use of downhole turbochargers

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)

Abstract

La présente invention concerne un dispositif de mise sous pression en fond de trou qui comprend un manchon (7) et une colonne de forage de forme tubulaire (4). Une colonne de mise sous pression de forme tubulaire (10) est disposée entre le manchon (7) et la colonne de forage de forme tubulaire (4). Un espace annulaire existe entre le trou intérieur de la colonne de mise sous pression de forme tubulaire (10) et la circonférence extérieure de la colonne de forage de forme tubulaire (4). Un espace annulaire existe entre la circonférence extérieure de la colonne de mise sous pression de forme tubulaire (10) et le trou intérieur du manchon (7). Un manchon supérieur de mise sous pression, une chambre (1), et un manchon inférieur de mise sous pression de la colonne de mise sous pression de forme tubulaire (10) sont raccordés de façon fixe et séquentiellement de haut en bas. Une garniture annulaire (9) pour garnir l'espace annulaire de la colonne de mise sous pression de forme tubulaire (10) et le manchon (7) est montée sur le manchon inférieur de mise sous pression sous la chambre (1). Un trou d'eau de mise sous pression (2) est monté de façon fixe sur la chambre (1). Le trou d'eau de mise sous pression (2) est en communication avec un espace annulaire à l'extérieur de la chambre (1). Le dispositif de mise sous pression présente une structure simple, et peut augmenter la vitesse de circulation du liquide en fond de trou sans changer la pression nominale du système de mise sous pression par pompe en sol, améliorant ainsi les performances de rupture de roche et de transport de sable.
PCT/CN2012/000834 2011-08-19 2012-06-15 Dispositif de mise sous pression en fond de trou WO2013026256A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011102389398A CN102953696A (zh) 2011-08-19 2011-08-19 井下增压装置
CN201110238939.8 2011-08-19

Publications (1)

Publication Number Publication Date
WO2013026256A1 true WO2013026256A1 (fr) 2013-02-28

Family

ID=47745879

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/000834 WO2013026256A1 (fr) 2011-08-19 2012-06-15 Dispositif de mise sous pression en fond de trou

Country Status (2)

Country Link
CN (1) CN102953696A (fr)
WO (1) WO2013026256A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499334B (zh) * 2016-11-16 2024-04-12 海斯比得（武汉）石油科技有限公司 井下滑动密封工具、无限延伸钻井装置及其钻井方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4630691A (en) * 1983-05-19 1986-12-23 Hooper David W Annulus bypass peripheral nozzle jet pump pressure differential drilling tool and method for well drilling
WO2002084067A1 (fr) * 2001-04-18 2002-10-24 Northland Energy Corporation Procede de controle dynamique de la pression d'ecoulement en fond de puits dans un puits de forage
US20040011561A1 (en) * 2002-07-22 2004-01-22 Hughes W. James Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casing
WO2004083590A2 (fr) * 2003-03-13 2004-09-30 Tesco Corporation Procede et appareil de forage de puits faisant appel a une crepine de puits
CN201416391Y (zh) * 2009-06-23 2010-03-03 大庆油田有限责任公司 井下增压器
CN202249849U (zh) * 2011-08-19 2012-05-30 中国石油集团渤海石油装备制造有限公司 井下增压装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4630691A (en) * 1983-05-19 1986-12-23 Hooper David W Annulus bypass peripheral nozzle jet pump pressure differential drilling tool and method for well drilling
WO2002084067A1 (fr) * 2001-04-18 2002-10-24 Northland Energy Corporation Procede de controle dynamique de la pression d'ecoulement en fond de puits dans un puits de forage
US20040011561A1 (en) * 2002-07-22 2004-01-22 Hughes W. James Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casing
WO2004083590A2 (fr) * 2003-03-13 2004-09-30 Tesco Corporation Procede et appareil de forage de puits faisant appel a une crepine de puits
CN201416391Y (zh) * 2009-06-23 2010-03-03 大庆油田有限责任公司 井下增压器
CN202249849U (zh) * 2011-08-19 2012-05-30 中国石油集团渤海石油装备制造有限公司 井下增压装置

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CN102953696A (zh) 2013-03-06

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