WO2021082438A1 - Séparateur boue-fluide de forage de type forcé - Google Patents

Séparateur boue-fluide de forage de type forcé Download PDF

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Publication number
WO2021082438A1
WO2021082438A1 PCT/CN2020/093837 CN2020093837W WO2021082438A1 WO 2021082438 A1 WO2021082438 A1 WO 2021082438A1 CN 2020093837 W CN2020093837 W CN 2020093837W WO 2021082438 A1 WO2021082438 A1 WO 2021082438A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
tank
drilling
kinetic energy
slurry
Prior art date
Application number
PCT/CN2020/093837
Other languages
English (en)
Chinese (zh)
Inventor
廖卫勇
胡桂军
王海波
Original Assignee
平煤建工集团特殊凿井工程有限公司
上海书起机电工程有限公司
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 平煤建工集团特殊凿井工程有限公司, 上海书起机电工程有限公司 filed Critical 平煤建工集团特殊凿井工程有限公司
Priority to EP20882133.0A priority Critical patent/EP3904633A4/fr
Publication of WO2021082438A1 publication Critical patent/WO2021082438A1/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
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065—Separating solids from drilling fluids
    • 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
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • 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
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065—Separating solids from drilling fluids
    • E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal

Definitions

  • the invention relates to the technical field of engineering drilling rigs, in particular to a forced drilling slag fluid separator.
  • the Chinese patent with the publication number CN209195306U discloses a closed circulation system of drilling fluid for small and medium-sized drilling rigs.
  • the system optimizes the drilling fluid circulation system, the system is complex in structure, large in equipment, distributed among various components, and only has sedimentation and removal functions.
  • the sand function can not separate the fine particles in the drilling fluid, and the separation and slag removal effect is not ideal, and it cannot be applied to some special requirements.
  • the present invention provides a forced drilling slag fluid separator, which solves the shortcomings of a large area of drilling slag fluid separation equipment during drilling construction, compact structure, small volume, and convenient operation .
  • a forced drilling slag fluid separator comprising a slag kinetic energy attenuation tank, a slag tank and a slag conveying device which are arranged from top to bottom and communicate in sequence.
  • the kinetic energy attenuation box is a hollow box with one end open and one end closed; a mud pipe, one end is used to connect the drilling rig output pipe of the drilling reverse circulation system, and the other end is located at the open end of the slag-liquid kinetic energy attenuation box; a grid plate , Set between the slag kinetic energy attenuation tank and the slag tank, used for the re-attenuation and diversion of the drilling slag kinetic energy and the screening of large drilling slag; a slurry tank is connected with the overflow of the slag tank to return slurry The outlet of the tank is used to output the separated drilling fluid back to the well.
  • the present invention also includes a hydrocyclone sand removal device, the hydrocyclone sand removal device includes a hydrocyclone and a submerged gravel pump, the submerged gravel pump is arranged in the slurry tank Inside, the slurry inlet of the hydrocyclone and the slurry outlet of the submerged sand-gravel pump are connected by an inlet pipe, and the outlet pipe of the hydrocyclone is led to the outlet of the slurry returning tank.
  • the lower part of the slag kinetic energy attenuation tank is connected to the upper part of the slag tank as a whole, and the slurry outlet of the slag kinetic energy attenuation tank corresponds to the position of the slurry inlet of the slag tank, and the grid plate It is horizontally fixed in the slag liquid kinetic energy attenuation tank or the slag tank.
  • the grid plate is a steel grid plate.
  • gratings can be flexibly selected according to the actual situation, not limited to steel gratings.
  • the sediment conveying device is a screw conveyor.
  • the upper part of the screw conveyor is connected to the bottom of the slag box as a whole, and the slag inlet of the screw conveyor corresponds to the position of the slag outlet of the slag box, and the outlet end of the screw conveyor There are gates.
  • the present invention does not need to set up a separate mud sedimentation tank, and centrally arranges the kinetic energy attenuation tank of the slag liquid, the slag tank and the slag conveying device, so the occupied area is greatly reduced and the structure is compact. , Easy to operate.
  • the invention first uses the slag liquid kinetic energy attenuation box to greatly attenuate the kinetic energy of the drilling slag liquid sent from the mud pipe to facilitate the effective operation of the subsequent sediment, and then uses the grid plate to perform preliminary filtering of the drilling slag liquid, and then uses the sediment box for precipitation , Remove the slag, and discharge the drilling slag by the slag conveying device.
  • hydrocyclones can also be used to further remove fine sand particles to achieve a better separation effect.
  • the invention can complete the slag precipitation, slag removal, and sand removal processes in drilling operations at the same time in one device, and has the advantages of compact structure, small volume, good separation effect, easy operation, etc., and is particularly suitable for water drilling operations and operations Small area operation occasions.
  • Figure 1 is a schematic diagram of the overall structure of the present invention.
  • Fig. 2 is a schematic diagram of the structure of the sediment conveying device in Fig. 1;
  • Fig. 3 is a schematic diagram of the structure of the grid plate in Fig. 1.
  • the present invention provides a forced drilling slag fluid separator, which includes a slag kinetic energy attenuation tank 1, a slag tank 3 and a slag conveying device 4 arranged from top to bottom and communicated in sequence.
  • the slag kinetic energy attenuation box 1 is a hollow box with one end open and one end closed.
  • the closed end is used to block the drilling slag fluid, so that the kinetic energy of the drilling slag fluid is greatly attenuated to facilitate subsequent processing.
  • the open end is provided with a mud pipe 5
  • One end of the mud pipe 5 is used to connect the drilling rig mud pipe of the drilling reverse circulation system (as shown at B in Fig. 1), and the other end, the end of the mud pipe, is set at the open end of the slag liquid kinetic energy attenuation box 1.
  • the end of the mud pipe can be fixedly connected to the slag liquid kinetic energy attenuation tank 1 or any other suitable method to keep its position fixed.
  • the lower part of the slag kinetic energy attenuation box 1 is connected to the upper part of the slag tank 3 as a whole, and the slurry outlet of the slag kinetic energy attenuation box 1 corresponds to the slurry inlet of the slag tank 3.
  • the inlet end of the mud pipe 5 and the mud outlet pipe of the drilling rig can be connected by a quick joint 6 so that it can be quickly disassembled and assembled under the premise of ensuring the sealing requirement.
  • other commonly used connection methods can also be selected between the inlet end of the mud pipe 5 and the mud outlet pipe of the drilling rig, which are all within the protection scope of the present invention.
  • a grid plate 2 is provided between the slag kinetic energy attenuation tank 1 and the slag tank 3, and the drilling slag fluid blocked by the slag kinetic energy attenuation tank 1 flows back to the grid plate 2 below the slag kinetic energy attenuation tank 1, with Further attenuate the kinetic energy of drilling slag fluid, diversion and screening and filtering of large pieces of drilling slag.
  • the so-called grid plate in the present invention is arranged between the slag liquid kinetic energy attenuation tank and the slag tank, which means that the grid plate can perform the screening and filtering function of large drilling slag between the slag liquid kinetic energy attenuation tank and the slag tank.
  • the grid 2 is horizontally fixed in the slag kinetic energy attenuation tank 1 or the slag tank 3.
  • the grating can also be arranged at the joint surface between the slag liquid kinetic energy attenuation tank and the slag tank under the condition of ensuring the sealing.
  • the grating 2 is preferably a steel grating. As shown in Figure 3, the steel grating is a special large-particle ballast screening device that can attenuate rock slag.
  • the liquid flow energy of the slurry makes the liquid flow evenly divided into the squares, and forces the liquid flow to move downwards, and at the same time, it can filter large rock masses, thereby ensuring the normal operation of the sediment conveying device 4.
  • the setting position of the grid plate 2 can be adjusted accordingly according to the actual situation, and the type and material can also be flexibly selected according to the actual situation, and is not limited to the form of this embodiment.
  • the present invention also includes a slurry returning tank 7 and a hydrocyclone sand removal device.
  • the slurry return tank 7 communicates with the overflow port of the sediment tank 3, and the drilling slag fluid overflowing from the overflow flows into the slurry return tank 7, and the outlet of the slurry return tank 7 is used to output the separated drilling fluid back to the well.
  • the box body of the slag box 3 and the box body of the slurry returning tank 7 are connected as a whole.
  • the hydrocyclone sand removal device includes a hydrocyclone 9 and a submerged gravel pump 8.
  • the submerged gravel pump 8 is arranged in the slurry returning tank 7.
  • the submerged gravel pump 8 is arranged in the slurry returning tank 7 next to the overflow of the sediment box 3, and its base is fixedly connected to the slurry returning tank 7.
  • the slurry inlet of the hydrocyclone 9 and the slurry outlet of the submersible sand pump 8 are connected by an inlet pipe 10, and the outlet pipe 11 of the hydrocyclone 9 is led to the outlet of the slurry return tank 7.
  • the submerged sand-gravel pump 8 sucks the sedimented drilling slag liquid from the bottom of the slurry return tank 7 and pumps it into the hydrocyclone 9 for further separation treatment.
  • the hydrocyclone sand removal device is used to separate the fine sand particles in the drilling fluid that is used to return after sedimentation and screening of large drilling slag, so that the returned drilling fluid has a higher quality. For operations that do not require high requirements for returning drilling fluid, the hydrocyclone sand removal device can be omitted.
  • the working principle of the hydrocyclone 9 is: adopting the centrifugal sedimentation separation method, the drilling slag liquid enters the cylindrical part from the liquid inlet pipe 10 to form a swirling flow, and is separated under the action of inertial centrifugal force due to different density or particle size.
  • the hydrocyclone 9 can separate and discharge the fine sand in the drilling slag fluid, and can classify, separate and concentrate multiple incompatible slurries.
  • the separated drilling slag fluid is led to the outlet of the slurry return tank 7. It flows back into the well along with the remaining drilling slag fluid that has been cleaned.
  • the hydrocyclone 9 is integrally installed with the drilling slag fluid separator. As shown in FIG. 1, the hydrocyclone 9 can be fixed on the outer side of the sediment tank 3. According to the actual situation, the setting position of the hydrocyclone can be adjusted appropriately, and all equivalent replacement methods are within the protection scope of the present invention.
  • the sediment conveying device 4 is a screw conveyor.
  • Fig. 2 is a cross-sectional view taken along the line A-A of the sediment conveying device.
  • the screw conveyor will be described in detail below in conjunction with Fig. 2.
  • the screw conveyor mainly includes a slot 12, a screw, a driving mechanism and a gate 15.
  • the upper part of the screw conveyor is connected to the bottom of the slag box 3 as a whole, and the slag inlet of the screw conveyor corresponds to the position of the slag outlet of the slag box 3.
  • the upper end of the machine tank 12 is connected to the bottom of the slag tank 3 as a whole.
  • the screw mainly includes a screw blade 14 and a screw drive shaft 13, and the screw blade 14 is arranged around the screw drive shaft 13.
  • the driving device of the screw drive shaft mainly includes a drive motor 17 and a sealed bearing box 16.
  • the screw drive shaft 13 and the output shaft of the drive motor 17 are connected by a universal joint 19.
  • the drive motor 17 adopts a low-speed high-torque hydraulic motor, which has the advantages of large drive torque, overload protection, and small size.
  • other types of drive motors can also be used; preferably, sealed bearings
  • the box 16 adopts a special floating seal ring, which can prevent the deposited high-hardness abrasive slag from immersing into the bearing cavity and damaging the bearing.
  • the sealed bearing box can also adopt other types to meet the requirements.
  • the screw conveyor is a mature conveying device, and its driving mechanism and other details will not be described in detail here.
  • the exit end of the screw conveyor is provided with a gate 15 which is driven to open and close by a gate driving device.
  • the gate drive device is a commonly used drive device in the field, and will not be described in detail here.
  • a hydraulic oil cylinder or an electric device can be used, which are all within the protection scope of the present invention.
  • the power and control system when sand removal and slag discharge are required, the power and control system respectively control the hydrocyclone, the submerged gravel pump, and the screw drive shaft of the screw conveyor.
  • the device and the gate drive device work. When the material is discharged, the gate is opened and when the machine is stopped, the gate is closed to prevent the slurry from leaking.
  • the working principle of the present invention is: the drilling slag liquid (slurry slag liquid) of the drilling reverse circulation system raised to the surface drilling rig through the drill pipe is connected to the mud pipe, and sprayed from the outlet end of the mud pipe to the closed end of the slag liquid kinetic energy attenuation box After being blocked, the jet flow energy is greatly attenuated and flowed back to the steel grating under the slag-liquid kinetic energy attenuation tank, and then diverted. The flow velocity is further attenuated, and the drilling slag liquid falls uniformly and naturally on the steel after passing through the steel grating. Inside the sediment box under the grid.
  • the drilling slag in the drilling slag fluid is precipitated in the slag tank, and the screw conveyor discharges the drilling slag.
  • the sedimentation and separation of the drilling slag fluid overflows from the overflow at the upper part of the slag tank and enters the slurry return tank.
  • the submerged sand and gravel pump absorbs the drilling slag liquid from the bottom of the slurry recovery tank and pumps it into the hydrocyclone.
  • the hydrocyclone separates the fine sand in the drilling slag fluid and leads it to the outlet of the slurry recovery tank. Return to the drilling rig along with the remaining drilling fluid that has been cleaned.
  • the drilling separator of the present invention can separate the large-particle drilling slag from the drilling fluid, and part of the fine-particle sand can also be continuously separated for recycling.

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  • 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)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Earth Drilling (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

L'invention concerne un séparateur boues-fluide de forage forcé, comprenant un réservoir d'atténuation d'énergie cinétique de boues-fluide (1), un réservoir de boues sédimentées (3) et un dispositif de transport de boues sédimentées (4) qui sont disposés de haut en bas et en communication en séquence ; le séparateur comprend en outre un tuyau de boue (5) pour acheminer des boues de forage et un fluide, une plaque de grille (2) utilisée pour réatténuer et diviser l'énergie cinétique des boues de forage et du fluide et cribler des pièces importantes de boues de forage, un réservoir de reflux (7) utilisé pour transporter le fluide de forage séparé en retour vers un puits foré, et un dispositif de désiltage d'hydrocyclone pour une réduction supplémentaire. Selon le séparateur de l'invention, les procédés de sédimentation des boues, d'élimination des boues et de désaération dans l'opération de forage sont achevées simultanément dans le même équipement, et le séparateur présente les avantages d'une structure compacte, d'un petit volume, d'une sécurité et d'une fiabilité, et d'une facilité de fonctionnement.
PCT/CN2020/093837 2019-10-28 2020-06-02 Séparateur boue-fluide de forage de type forcé WO2021082438A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20882133.0A EP3904633A4 (fr) 2019-10-28 2020-06-02 Séparateur boue-fluide de forage de type forcé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911031881.2 2019-10-28
CN201911031881.2A CN110566143A (zh) 2019-10-28 2019-10-28 一种强制式钻井渣液分离器

Publications (1)

Publication Number Publication Date
WO2021082438A1 true WO2021082438A1 (fr) 2021-05-06

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PCT/CN2020/093837 WO2021082438A1 (fr) 2019-10-28 2020-06-02 Séparateur boue-fluide de forage de type forcé

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EP (1) EP3904633A4 (fr)
CN (1) CN110566143A (fr)
WO (1) WO2021082438A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110566143A (zh) * 2019-10-28 2019-12-13 平煤建工集团特殊凿井工程有限公司 一种强制式钻井渣液分离器

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CN2145259Y (zh) * 1993-02-05 1993-11-03 姚良 钻井液除砂除泥组合式清洁器
WO1998008587A1 (fr) * 1996-08-30 1998-03-05 Hydrotech Dynamics Ltd. Systeme et procede de separation de solides d'un liquide
CN1354693A (zh) * 1999-01-08 2002-06-19 阳光钻探产品公司 用于钻进和挖掘领域的回收装置及相关的方法
CN1803680A (zh) * 2005-12-20 2006-07-19 王鸿飞 钻井泥浆回收净化再利用装置系统及泥浆净化回收方法
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CN209195306U (zh) 2018-11-16 2019-08-02 中国石油天然气集团有限公司 中小型钻机钻井液密闭循环系统
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US3713499A (en) * 1971-08-11 1973-01-30 Gulf Research Development Co Method and apparatus for treating drilling mud
CN2145259Y (zh) * 1993-02-05 1993-11-03 姚良 钻井液除砂除泥组合式清洁器
WO1998008587A1 (fr) * 1996-08-30 1998-03-05 Hydrotech Dynamics Ltd. Systeme et procede de separation de solides d'un liquide
CN1354693A (zh) * 1999-01-08 2002-06-19 阳光钻探产品公司 用于钻进和挖掘领域的回收装置及相关的方法
CN1803680A (zh) * 2005-12-20 2006-07-19 王鸿飞 钻井泥浆回收净化再利用装置系统及泥浆净化回收方法
CN104420844A (zh) * 2013-08-21 2015-03-18 德惠同利（北京）石油技术服务有限公司 一种循环钻井液不落地的固液分离方法
CN206458363U (zh) * 2014-03-07 2017-09-01 R.J.葛兹平克私人有限公司 钻井液收集设备
CN205259983U (zh) * 2015-12-22 2016-05-25 长江大学 钻井泥浆接收筛分输送一体化装置
CN209195306U (zh) 2018-11-16 2019-08-02 中国石油天然气集团有限公司 中小型钻机钻井液密闭循环系统
CN110566143A (zh) * 2019-10-28 2019-12-13 平煤建工集团特殊凿井工程有限公司 一种强制式钻井渣液分离器

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See also references of EP3904633A4

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Publication number Publication date
EP3904633A1 (fr) 2021-11-03
CN110566143A (zh) 2019-12-13
EP3904633A4 (fr) 2022-07-20

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