WO2020087762A1 - 新型钻井套管及大井眼多分支井快速钻完井方法 - Google Patents

新型钻井套管及大井眼多分支井快速钻完井方法 Download PDF

Info

Publication number
WO2020087762A1
WO2020087762A1 PCT/CN2018/125987 CN2018125987W WO2020087762A1 WO 2020087762 A1 WO2020087762 A1 WO 2020087762A1 CN 2018125987 W CN2018125987 W CN 2018125987W WO 2020087762 A1 WO2020087762 A1 WO 2020087762A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
sand control
casing
branch
completion
Prior art date
Application number
PCT/CN2018/125987
Other languages
English (en)
French (fr)
Inventor
闫传梁
任旭
程远方
田万顷
李阳
李庆超
魏佳
宋本健
Original Assignee
中国石油大学(华东)
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 中国石油大学(华东) filed Critical 中国石油大学(华东)
Priority to US16/757,569 priority Critical patent/US10989036B2/en
Publication of WO2020087762A1 publication Critical patent/WO2020087762A1/zh

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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • 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
    • E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
    • 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
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
    • 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
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • 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
    • E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
    • E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • 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
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/101—Setting of casings, screens, liners or the like in wells for underwater installations

Definitions

  • the present invention relates to the technical field of natural gas hydrate mining, and in particular to a new type of drilling casing and a method for rapidly drilling and completing a large borehole and multi-branch well using the new type of drilling casing.
  • Natural gas hydrate is an ice-like solid formed by natural gas and water under certain temperature and pressure conditions, commonly known as combustible ice, which is mainly distributed in sediments of 0 to 1100 m below the seafloor on the continental margin. Natural gas hydrate has the characteristics of very wide distribution, huge reserves, and large energy density, so it has broad development prospects as a potential energy source that can replace traditional fossil energy.
  • the mining methods of natural gas hydrates mainly include: heat transfer excitation mining method, decompression mining method, chemical reagent injection method, carbon dioxide replacement method, solid fluidized mining method, etc. Due to the complex formation of natural gas hydrate deposits and complex geological conditions, the mechanical properties of hydrate formations have changed during the drilling, completion and gas production of these methods, and the problem of sand production is particularly serious, and during drilling or completion operations, due to The overlying rock layer is loose and often collapses, which affects the progress of the construction period, resulting in a long drilling and completion period, which is time-consuming and labor-intensive. It has become an urgent problem that restricts the safe and efficient production of natural gas hydrates.
  • the present invention provides a new type of drilling casing and a method of using the new type of drilling casing to drill and complete a large borehole multi-branched well.
  • a new type of drilling casing includes a casing wall and several sand control devices arranged on the casing wall at intervals, each sand control device includes a sand control net, a sealing steel sheet and a sealing rubber plug, and the sand control net How much layout Two sand control screen holes parallel to each other, the sand control screen holes are directly opposite to the sealing steel sheet, and sealing rubber plugs are respectively provided on the contact surfaces of the left and right end surfaces of the sealing steel sheet and the sand control net, The sand control net is connected with the sealing steel sheet through a steel pin, and the steel pin is also connected in series with the steel ring on the sealing steel sheet through a thin steel wire.
  • step (1) when drilling a large main borehole for cementing, it is only necessary to cement the rock formation with water injection mud, and not to cement the cement hydrate reservoir.
  • a reamer is also provided at the connection between the thick wire rope and the drill bit.
  • step (1) the radius of the reserved branch hole on the casing of the large main wellbore is larger than the radius of the reamer by 10 mm to 20 mm.
  • the reserved branch hole and the large main wellbore casing form an angle of 40o-50o.
  • step (2) when drilling the lateral wellbore, the sand control net in the sand control device is blocked by the sealing steel sheet and the sealing rubber plug and stuck with the steel pin, and the new drilling casing is in a sealed state.
  • the present invention uses a large main borehole in combination with multiple branch boreholes to increase the gas hydrate layer
  • the contact area further improves the recovery factor and optimizes the well pattern structure.
  • the multi-branch borehole adopts a new type of drilling casing drilling technology, and the drilling process is completed synchronously with the casing.
  • the branch borehole of casing drilling is accompanied by casing from beginning to end, thus reducing downhole accidents and improving well control. Because the inner diameter of the casing is larger than that of the drill pipe, the annulus area becomes smaller, the water conservancy parameters are improved, the integration of drilling and completion is completed, the pollution of the gas hydrate reservoir during the cementing process is avoided, and the drilling and completion period is shortened. Save a lot of manpower and material resources.
  • the new drilling casing can not only serve as a drill pipe during drilling, but also as a casing with sand control function during the completion process.
  • the pore size can not only achieve effective sand control, but also ensure the recovery factor.
  • the present invention uses a large-size drill bit to drill to the target well depth to form the main borehole at once, and then uses a new type of drilling casing to drill branch boreholes in the natural gas hydrate reservoir, and then removes the drill bit to complete the well.
  • the completion method is applicable to various natural gas hydrate mining methods, which can greatly increase the production and recovery rate of hydrate wells, and integrate drilling and completion, shorten the drilling and completion cycle, save a lot of manpower and material resources, and can also be effective Sand control.
  • FIG. 1 is a schematic structural view of a casing sand control device in the present invention
  • FIG. 2 is a schematic diagram of a drilling structure in the present invention
  • FIG. 3 is a schematic view of the top structure of FIG. 2;
  • FIG. 4 is a schematic diagram of a casing drilling process performed by a branch wellbore in the present invention.
  • a new type of drilling casing includes a casing wall and a plurality of sand control devices 7 arranged on the casing wall at intervals, each sand control device 7 includes a sand control net and a sealing steel sheet 7-3 And the sealing rubber plug 7-2, a plurality of parallel sand control screen holes 7-1 are arranged on the sand control screen, the sand control screen holes 7-1 face the sealing steel sheet 7-3, the left and right sides of the sealing steel sheet 7-3 A sealing rubber plug 7-2 is also provided on the contact surface of each end surface and the sand control net, respectively, the sealing rubber plug 7-2 is used to seal the contact surface of the sealing steel sheet 7-3 and the sand control net, and the sand control mesh and the sealing steel plate 7- 3 is connected by a steel pin 7-4.
  • the steel pin 7-4 can realize the connection and disassembly of the sand control net and the sealing steel sheet 7-3.
  • the steel pin 7-4 is also connected to the steel pin 7-4
  • step (1) the hole radius of the reserved branch hole 9 on the large main wellbore casing 4 is larger than the radius of the reamer 11 by 10-20 mm. This is for drilling the branch wellbore 6. It is convenient for the new drilling casing containing the reamer 11 to pass through the casing of the large main wellbore 5, and the casing will not be stuck.
  • the angle between the branch hole 9 and the large main wellbore casing 4 is set at 40 ° -50 °, and the size of the angle is reserved by the technician at the inclination angle designed at the deflection point when designing the horizontal well track .
  • the present invention adopts the manner of a large main borehole 5 cooperated with a plurality of branch boreholes 6, which increases the contact area with the natural gas hydrate layer, further improves the recovery factor, and can optimize the well pattern structure.
  • the multi-branch borehole 6 adopts a new type of drilling casing drilling technology, and the drilling process and casing are completed synchronously.
  • the branch borehole 6 of casing drilling is accompanied by casing from beginning to end, thus reducing downhole accidents and improving well control. Because the inner diameter of the casing is larger than that of the drill pipe, the annulus area becomes smaller, the water conservancy parameters are improved, the integration of drilling and completion is completed, the pollution of the gas hydrate reservoir during the cementing process is avoided, and the drilling and completion period is shortened. Save a lot of manpower and material resources.
  • the new type of drilling casing can not only serve as a drill pipe during drilling, but also as a casing with sand control function during the completion process.
  • the pore size can not only achieve effective sand control, but also ensure the recovery factor.

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)
  • Earth Drilling (AREA)

Abstract

一种新型钻井套管及使用该新型钻井套管进行大井眼多分支井快速钻完井方法，该套管包括套管壁和间隔的设置于套管壁上的若干个防砂装置(7)，每个防砂装置(7)均包括防砂网、密封钢片(7-3)和密封橡胶塞(7-2)，防砂网上布置有多个相互平行的防砂筛孔(7-1)，防砂筛孔(7-1)正对密封钢片(7-3)，防砂网与密封钢片(7-3)之间通过钢销(7-4)连接。该方法采用大尺寸钻头(12)一次性钻至目的井深形成主井眼(5)，再利用新型钻井套管在天然气水合物储层中钻取分支井眼(6)，然后取出钻头(12)进行完井，适用于各种天然气水合物开采方式，能够大幅度提高水合物井的产量和采收率，并且钻完井一体化，缩短钻完井周期，节省大量的人力物力的同时还能有效的防砂。

Description

新型钻井套管及大井眼多分支井快速钻完井方法 技术领域
[0001] 本发明涉及天然气水合物开采技术领域， 尤其涉及一种新型钻井套管及使用该 新型钻井套管进行大井眼多分支井快速钻完井方法。
背景技术
[0002] 天然气水合物是一种由天然气与水在一定温度和压力条件下形成的类冰状固体 ， 俗称可燃冰， 主要分布于大陆边缘海底之下 0 ~ 1100 m的沉积物中。 由于天然 气水合物具有分布非常广泛、 储量巨大、 能量密度大的特点， 因此其作为能够 取代传统化石能源的潜在能源， 具有广阔的发展前景。
[0003] 目前， 天然气水合物的开采方法主要有： 传热激发开采法、 减压开采法、 化学 试剂注入法， 二氧化碳置换法、 固态流化开采法等。 由于天然气水合物矿藏形 成和地质条件复杂， 这些方法在钻井、 完井及采气过程中， 含水合物地层的力 学性质发生变化， 出砂问题尤为严重， 而且在钻井或完井作业时， 由于上覆岩 层疏松， 往往会发生坍塌， 影响工期进度， 导致钻完井工期较长， 费时费力， 目前已经成为制约天然气水合物安全高效开采的一个亟需解决的问题。
[0004] 经过对国内外现有的技术专利文献的检索发现， 目前还没有完全解决该问题的 钻完井技术相关的专利。
发明概述
技术问题
问题的解决方案
技术解决方案
[0005] 为解决上述技术问题， 本发明提供一种新型钻井套管及使用该新型钻井套管进 行大井眼多分支井快速钻完井方法。
[0006] 为实现上述目的， 本发明采用下述技术方案：
[0007] 新型钻井套管， 包括套管壁和间隔的设置于所述套管壁上的若干个防砂装置， 每个防砂装置均包括防砂网、 密封钢片和密封橡胶塞， 所述防砂网上布置有多 个相互平行的防砂筛孔， 所述防砂筛孔正对所述密封钢片， 所述密封钢片的左 、 右两个端面与所述防砂网的接触面还分别设置密封橡胶塞， 所述防砂网与所 述密封钢片之间通过钢销连接， 所述钢销还与密封钢片上的钢环通过细钢丝相 串联。
[0008] 进一步地， 所述防砂筛孔的设计精度为 co=3.8d50， 其中， d50为天然气水合物 储层中极细砂的粒径中值。
[0009] 使用上述新型钻井套管进行大井眼多分支井快速钻完井方法， 具体步骤如下:
[0010] ( 1) 使用大尺寸的钻头钻到目的层位， 钻取大主井眼， 再将预留分支孔的大 主井眼套管下入大主井眼， 然后进行注水泥固井作业；
[0011] (2) 在预留分支孔上用新型钻井套管钻取分支井眼， 伸入预留分支孔一端的 粗钢丝绳与钻头相连接， 新型钻井套管处于密封状态， 并充当钻杆钻进；
[0012] (3) 当钻到目的层处时， 使用粗钢丝绳将钻头取出；
[0013] (4) 使用细钢丝将钢销拽出， 通过串联的钢环将密封钢片和密封橡胶塞一同 拉出， 打开防砂装置， 此时， 新型钻井套管由钻杆转变为具有防砂功能的套管 ， 完成一个分支井眼的完井作业；
[0014] (5) 重复步骤 (2) - (4) ， 完成其余分支井眼的完井作业。
[0015] 进一步地， 步骤 ( 1) 中， 钻取大主井眼后进行固井时， 只需对岩层进行注水 泥固井， 不对天然气水合物储层进行注水泥固井。
[0016] 进一步地， 所述粗钢丝绳与钻头的连接处还设置有扩眼器。
[0017] 进一步地， 步骤 ( 1) 中， 大主井眼套管上的预留分支孔的孔半径比扩眼器的 半径大 10mm- 20mm。
[0018] 进一步地， 所述预留分支孔与大主井眼套管呈 40o-50o的夹角。
[0019] 进一步地， 步骤 (2) 中， 钻取分支井眼时， 防砂装置中的防砂网被密封钢片 和密封橡胶塞堵住并用钢销卡住， 新型钻井套管处于密封状态。
发明的有益效果
有益效果
[0020] 本发明的有益效果是，
[0021] 1、 本发明采用大主井眼配合多个分支井眼的方式， 增大了与天然气水合物层 的接触面积， 进一步的提高了采收率， 并可以优化井网结构。
[0022] 2、 多分支井眼采用新型钻井套管钻井技术， 钻井过程与下套管同步完成， 套 管钻井的分支井眼自始至终伴随着套管， 因此减少了井下事故， 改善了井控情 况， 因为套管内径比钻杆大， 环空面积变小， 改善了水利参数， 钻完井一体化 ， 避免了在固井过程中对天然气水合物藏的污染， 而且缩短了钻完井工期， 节 省了大量人力物力费用。
[0023] 3、 新型钻井套管既可以充当钻进过程中的钻杆， 还可以在完井过程中充当具 有防砂功能的套管， 在新型钻井套管上的防砂筛孔设计精度为 co=3.8d50, 该筛 网设计精度根据天然气水合物极细砂储层防砂实验得出， 该孔径既能做到有效 防砂， 而且还可以保障采收率。
[0024] 本发明采用大尺寸钻头一次性钻至目的井深形成主井眼， 再利用新型钻井套管 在天然气水合物储层中钻取分支井眼， 然后取出钻头进行完井， 本发明的钻完 井方法适用于各种天然气水合物开采方式， 能够大幅度提高水合物井的产量和 采收率， 并且钻完井一体化， 缩短钻完井周期， 节省大量的人力物力的同时还 能有效的防砂。
对附图的简要说明
附图说明
[0025] 图 1为本发明中的套管防砂装置结构示意图；
[0026] 图 2为本发明中的钻井结构示意图；
[0027] 图 3为图 2的俯视结构示意图；
[0028] 图 4为本发明中的分支井眼进行套管钻井过程中示意图；
[0029] 其中， 1、 海水层； 2、 岩层； 3、 天然气水合物储层； 4、 大主井眼套管； 5、 大主井眼； 6、 分支井眼； 7、 防砂装置； 7-1、 防砂筛孔； 7-2、 密封橡胶塞； 7- 3、 密封钢片； 7-4、 钢销； 8、 粗钢丝绳； 9、 预留分支孔； 10、 细钢丝； 11、 扩 眼器； 12、 钻头。
发明实施例
本发明的实施方式
[0030] 下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地描述， 显然， 所描述的实施例仅是本发明一部分实施例， 而不是全部的 实施例。 基于本发明中的实施例， 本领域普通技术人员在没有做出创造性劳动 前提下所获得的所有其他实施例， 都属于本发明保护的范围。
[0031] 如图 1所示， 新型钻井套管， 包括套管壁和间隔的设置于套管壁上的若干个防 砂装置 7， 每个防砂装置 7均包括防砂网、 密封钢片 7-3和密封橡胶塞 7-2， 防砂网 上布置有多个相互平行的防砂筛孔 7-1， 防砂筛孔 7-1正对密封钢片 7-3 , 密封钢 片 7-3的左、 右两个端面与防砂网的接触面还分别设置密封橡胶塞 7-2, 密封橡胶 塞 7-2用于对密封钢片 7-3与防砂网的接触面进行密封， 防砂网与密封钢片 7-3之 间通过钢销 7-4连接， 钢销 7-4可实现防砂网与密封钢片 7-3的连接和拆分， 钢销 7- 4还与密封钢片 7-3上的钢环通过细钢丝 10相串联。
[]
[0032] 防砂筛孔 7-1的设计精度为 to=3.8d50， 其中， d50为天然气水合物储层 3中极细 砂的粒径中值， 该数据可根据天然气水合物极细砂储层防砂实验得出。
[0033] 如图 2所示， 使用上述新型钻井套管进行大井眼多分支井快速钻完井方法， 具 体步骤如下：
[0034] ( 1) 使用大尺寸的钻头 12钻到目的层位， 深入海水层 1、 岩层 2、 天然气水合 物储层 3 , 钻取大主井眼 5 , 再将预留分支孔 9的大主井眼套管 4下入大主井眼 5， 然后进行注水泥固井作业， 此时， 只需对岩层 2进行注水泥固井， 不对天然气水 合物储层 3进行注水泥固井；
[0035] (2) 在预留分支孔 9上用新型钻井套管钻取分支井眼 6， 分支井眼 6均位于天然 气水合物储层 3中， 分支井眼 6分散的位于大主井眼 5周围， 如图 3的俯视结构图 ; 伸入预留分支孔 9一端的粗钢丝绳 8与钻头 12相连接， 粗钢丝绳 8与钻头 12的连 接处还设置有扩眼器 11， 此时， 防砂装置 7中的防砂网被密封钢片 7-3和密封橡胶 塞 7-2堵住， 并用钢销 7-4卡住， 新型钻井套管处于密封状态， 充当钻杆钻进；
[0036] (3) 当钻到目的层处时， 使用粗钢丝绳 8将钻头 12取出；
[0037] (4) 使用细钢丝 10将钢销 7-4拽出， 通过串联的钢环将密封钢片 7-3和密封橡胶 塞 7-2—同拉出， 打开防砂装置 7 , 此时， 新型钻井套管由钻杆转变为具有防砂功 能的套管， 完成一个分支井眼 6的完井作业； [0038] (5) 重复步骤 (2) - (4) ， 完成其余分支井眼 6的完井作业。
[0039] 特别的， 步骤 ⑴ 中， 大主井眼套管 4上预留分支孔 9的孔半径比扩眼器 11的 半径大 10mm-20mm， 这是为了在钻取分支井眼 6时， 方便含有扩眼器 11的新型钻 井套管穿过大主井眼 5的套管， 不会发生卡住套管的情况。
[0040] 预留分支孔 9与大主井眼套管 4呈 40o-50o的夹角， 该夹角大小由技术人员在水 平井轨道设计时在造斜点所设计的井斜角进行预留。
[0041] 本发明采用大主井眼 5配合多个分支井眼 6的方式， 增大了与天然气水合物层的 接触面积， 进一步的提高了采收率， 并可以优化井网结构。
[0042] 多分支井眼 6采用新型钻井套管钻井技术， 钻井过程与下套管同步完成， 套管 钻井的分支井眼 6自始至终伴随着套管， 因此减少了井下事故， 改善了井控情况 ， 因为套管内径比钻杆大， 环空面积变小， 改善了水利参数， 钻完井一体化， 避免了在固井过程中对天然气水合物藏的污染， 而且缩短了钻完井工期， 节省 了大量人力物力费用。
[0043] 新型钻井套管既可以充当钻进过程中的钻杆， 还可以在完井过程中充当具有防 砂功能的套管， 在新型钻井套管上的防砂筛孔 7-1设计精度为 co=3.8d50， 该筛网 设计精度根据天然气水合物极细砂储层防砂实验得出， 该孔径既能做到有效防 砂， 而且还可以保障采收率。
[0044] 当然， 上述说明并非是对本发明的限制， 本发明也并不仅限于上述举例， 本技 术领域的技术人员在本发明的实质范围内所做出的变化、 改型、 添加或替换， 也应属于本发明的保护范围。

Claims

权利要求书 [权利要求 1] 新型钻井套管， 其特征在于， 包括套管壁和间隔的设置于所述套管壁 上的若干个防砂装置， 每个防砂装置均包括防砂网、 密封钢片和密封 橡胶塞， 所述防砂网上布置有多个相互平行的防砂筛孔， 所述防砂筛 孔正对所述密封钢片， 所述密封钢片的左、 右两个端面与所述防砂网 的接触面还分别设置密封橡胶塞， 所述防砂网与所述密封钢片之间通 过钢销连接， 所述钢销还与密封钢片上的钢环通过细钢丝相串联。 [权利要求 2] 如权利要求 1所述的新型钻井套管， 其特征在于， 所述防砂筛孔的设 计精度为 co=3.8d50， 其中， d50为天然气水合物储层中极细砂的粒径 中值。 [权利要求 3] 使用如权利要求 1或 2所述的新型钻井套管进行大井眼多分支井快速钻 完井方法， 其特征在于， 具体步骤如下：
( 1) 使用大尺寸的钻头钻到目的层位， 钻取大主井眼， 再将预留分 支孔的大主井眼套管下入大主井眼， 然后进行注水泥固井作业；
(2) 在预留分支孔上用新型钻井套管钻取分支井眼， 伸入预留分支 孔一端的粗钢丝绳与钻头相连接， 新型钻井套管处于密封状态， 并充 当钻杆钻进；
(3) 当钻到目的层处时， 使用粗钢丝绳将钻头取出；
(4) 使用细钢丝将钢销拽出， 通过串联的钢环将密封钢片和密封橡 胶塞一同拉出， 打开防砂装置， 此时， 新型钻井套管由钻杆转变为具 有防砂功能的套管， 完成一个分支井眼的完井作业；
(5) 重复步骤 (2) - (4) ， 完成其余分支井眼的完井作业。
[权利要求 4] 如权利要求 3所述的大井眼多分支井快速钻完井方法， 步骤 ( 1) 中， 钻取大主井眼后进行固井时， 只需对岩层进行注水泥固井， 不对天然 气水合物储层进行注水泥固井。
[权利要求 5] 如权利要求 3所述的大井眼多分支井快速钻完井方法， 其特征在于， 所述粗钢丝绳与钻头的连接处还设置有扩眼器。
[权利要求 6] 如权利要求 5所述的大井眼多分支井快速钻完井方法， 其特征在于， 步骤 （1） 中， 大主井眼套管上的预留分支孔的孔半径比扩眼器的半 径大 10mm-20mm。
[权利要求 7] 如权利要求 6所述的大井眼多分支井快速钻完井方法， 其特征在于， 所述预留分支孔与大主井眼套管呈 40o-50o的夹角。
[权利要求 8] 如权利要求 3所述的大井眼多分支井快速钻完井方法， 其特征在于， 步骤 （2） 中， 钻取分支井眼时， 防砂装置中的防砂网被密封钢片和 密封橡胶塞堵住并用钢销卡住， 新型钻井套管处于密封状态。
PCT/CN2018/125987 2018-10-30 2018-12-31 新型钻井套管及大井眼多分支井快速钻完井方法 WO2020087762A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/757,569 US10989036B2 (en) 2018-10-30 2018-12-31 Drilling casing and method of performing fast drilling and completion of large-borehole multilateral well

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811273919.2A CN109236186B (zh) 2018-10-30 2018-10-30 钻井套管及大井眼多分支井快速钻完井方法
CN201811273919.2 2018-10-30

Publications (1)

Publication Number Publication Date
WO2020087762A1 true WO2020087762A1 (zh) 2020-05-07

Family

ID=65079205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/125987 WO2020087762A1 (zh) 2018-10-30 2018-12-31 新型钻井套管及大井眼多分支井快速钻完井方法

Country Status (3)

Country Link
US (1) US10989036B2 (zh)
CN (1) CN109236186B (zh)
WO (1) WO2020087762A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10989036B2 (en) * 2018-10-30 2021-04-27 China University Of Petroleum (East China) Drilling casing and method of performing fast drilling and completion of large-borehole multilateral well
CN115163041A (zh) * 2022-06-08 2022-10-11 中国地质大学（武汉） 一种煤层底板水平分支井注浆堵水可视化实验模拟方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110029968B (zh) * 2019-04-08 2020-02-14 中国石油大学(华东) 用于钻取水合物微小井眼并快速完井的装置及工作方法
CN110159233B (zh) * 2019-06-10 2021-07-23 中国石油大学(华东) 一种通过人工致密盖层提高天然气水合物藏采收率的方法
CN112145133B (zh) * 2020-09-25 2021-12-14 中国石油大学(华东) 一种深海海底天然气水合物采集方法及生产大棚
CN113006764B (zh) * 2021-03-09 2022-03-11 广州海洋地质调查局 一种多分支水合物置换开采方法
CN115012831B (zh) * 2022-06-20 2023-04-07 中国石油大学(北京) 一种携井眼支撑筛管的天然气水合物开采钻具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050034860A1 (en) * 2003-08-15 2005-02-17 Lauritzen J. Eric Screen for sand control in a wellbore
WO2007024627A2 (en) * 2005-08-22 2007-03-01 Halliburton Energy Services, Inc. Sand control screen assembly enhanced with disappearing sleeve and burst disc
CN101440701A (zh) * 2008-12-17 2009-05-27 中国石油天然气集团公司 一种欠平衡完井的暂堵式筛管
CN104895533A (zh) * 2015-06-25 2015-09-09 长江大学 水平井完井防砂用控水筛管
CN106761587A (zh) * 2016-11-18 2017-05-31 青岛海洋地质研究所 海洋粉砂质储层天然气水合物多分支孔有限防砂开采方法
CN107476787A (zh) * 2017-09-20 2017-12-15 长江大学 一种水平井完井浮阀式控水筛管

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899420A1 (en) * 1997-08-27 1999-03-03 Shell Internationale Researchmaatschappij B.V. Method for installing a scrolled resilient sheet alongside the inner surface of a fluid conduit
US20030173075A1 (en) * 2002-03-15 2003-09-18 Dave Morvant Knitted wire fines discriminator
US7287684B2 (en) * 2002-07-03 2007-10-30 Tubular Perforating Mfg., Ltd. Filter cartridge assembly and method of manufacture
US6932159B2 (en) * 2002-08-28 2005-08-23 Baker Hughes Incorporated Run in cover for downhole expandable screen
US6857476B2 (en) * 2003-01-15 2005-02-22 Halliburton Energy Services, Inc. Sand control screen assembly having an internal seal element and treatment method using the same
US7204316B2 (en) * 2004-01-20 2007-04-17 Halliburton Energy Services, Inc. Expandable well screen having temporary sealing substance
DE102006062189B4 (de) * 2006-12-22 2009-03-19 Dr. Mirtsch Gmbh Verfahren zum Herstellen einer strukturierten Materialbahn für das Durchströmen von fluiden Medien, strukturierte Materialbahn und Verwendung derselben
CN101067370B (zh) * 2007-04-23 2010-08-18 中国石油大学(华东) 自适应充填膨胀筛管及其膨胀方法
CN201165866Y (zh) * 2008-03-04 2008-12-17 北京华油油气技术开发有限公司 水平井分采合采管柱
US7841409B2 (en) * 2008-08-29 2010-11-30 Halliburton Energy Services, Inc. Sand control screen assembly and method for use of same
WO2010069117A1 (zh) * 2008-12-17 2010-06-24 中国石油天然气集团公司 欠平衡条件下的筛管完井方法及暂堵式筛管
US8302680B2 (en) * 2009-08-12 2012-11-06 Halliburton Energy Services, Inc. Swellable screen assembly
CN102022100A (zh) * 2009-09-11 2011-04-20 营口市石光石油机械有限责任公司 油井用串联式复合射孔-控砂装置
GB201019358D0 (en) * 2010-11-16 2010-12-29 Darcy Technologies Ltd Downhole method and apparatus
CN102979491A (zh) * 2011-09-06 2013-03-20 张景南 多元油井筛管
US20130206393A1 (en) * 2012-02-13 2013-08-15 Halliburton Energy Services, Inc. Economical construction of well screens
GB2500110B (en) * 2012-03-07 2014-02-19 Darcy Technologies Ltd Downhole Apparatus
GB201210532D0 (en) * 2012-06-14 2012-07-25 Darcy Technologies Ltd Subterranean formation methods and apparatus
NO341973B1 (en) * 2016-02-24 2018-03-05 Isealate As Improvements relating to lining an internal wall of a conduit
CN109236186B (zh) * 2018-10-30 2020-03-06 中国石油大学(华东) 钻井套管及大井眼多分支井快速钻完井方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050034860A1 (en) * 2003-08-15 2005-02-17 Lauritzen J. Eric Screen for sand control in a wellbore
WO2007024627A2 (en) * 2005-08-22 2007-03-01 Halliburton Energy Services, Inc. Sand control screen assembly enhanced with disappearing sleeve and burst disc
CN101440701A (zh) * 2008-12-17 2009-05-27 中国石油天然气集团公司 一种欠平衡完井的暂堵式筛管
CN104895533A (zh) * 2015-06-25 2015-09-09 长江大学 水平井完井防砂用控水筛管
CN106761587A (zh) * 2016-11-18 2017-05-31 青岛海洋地质研究所 海洋粉砂质储层天然气水合物多分支孔有限防砂开采方法
CN107476787A (zh) * 2017-09-20 2017-12-15 长江大学 一种水平井完井浮阀式控水筛管

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10989036B2 (en) * 2018-10-30 2021-04-27 China University Of Petroleum (East China) Drilling casing and method of performing fast drilling and completion of large-borehole multilateral well
CN115163041A (zh) * 2022-06-08 2022-10-11 中国地质大学（武汉） 一种煤层底板水平分支井注浆堵水可视化实验模拟方法

Also Published As

Publication number Publication date
CN109236186A (zh) 2019-01-18
US10989036B2 (en) 2021-04-27
US20210025268A1 (en) 2021-01-28
CN109236186B (zh) 2020-03-06

Similar Documents

Publication Publication Date Title
WO2020087762A1 (zh) 新型钻井套管及大井眼多分支井快速钻完井方法
WO2018090890A1 (zh) 海洋粉砂质储层天然气水合物多分支孔有限防砂开采方法
CN110397428B (zh) 一种直井与u型对接井联合开采煤层气的驱替煤层气增产方法
CN208594924U (zh) 开发增强型地热的井网结构
Wu et al. Drilling and completion technologies for deep carbonate rocks in the Sichuan Basin: Practices and prospects
CN108868706B (zh) 定向钻进超临界二氧化碳致裂置换开采天然气水合物方法
He et al. Development and prospect of separated zone oil production technology
CN101787854A (zh) 底水油藏水平井分段完井系统
Jing et al. Synchronous injection-production energy replenishment for a horizontal well in an ultra-low permeability sandstone reservoir: A case study of Changqing oilfield in Ordos Basin, NW China
CN103603643A (zh) 一种煤层气u型井分段压裂开采技术
WO2013178012A1 (zh) 一种深层煤炭水力开采流体承运的方法
Wang et al. Experimental research on the breaking effect of natural gas hydrate sediment for water jet and engineering applications
CN110173240A (zh) 一种煤矿瓦斯抽采方法
CN103711457A (zh) 一种六开次井身结构的设计方法
CN110306965A (zh) 一种用于煤层气低产井区的增产方法
CN112343560A (zh) 低渗透储层天然气水合物开采压裂与防砂联作工艺方法
CN108894765A (zh) 深水浅层天然气水合物开采的主辅井结构及其方法
CN111764871A (zh) 一种天然气水合物储层直增平采开采方法
CN110886594A (zh) 开采煤层气的方法
Miao et al. Development status and prospect of staged fracturing technology in horizontal wells
CN105201477A (zh) 一种用于油页岩原位体积破碎定向造缝方法
Xiumin et al. Research and application of gas-lift reverse circulation drilling technology to geothermal well construction in Dalian Jiaoliu Island
CN103362487A (zh) 一种低渗透油藏水平井的分段压裂方法
CN206617144U (zh) 一种海洋浅层天然气水合物微管增产装置
CN111734359A (zh) 一种基于深水吸力锚的天然气水合物水平分支井开采方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18938889

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18938889

Country of ref document: EP

Kind code of ref document: A1