WO2016061707A1 - 轴向和径向割缝筛管的可动组合防砂管 - Google Patents

轴向和径向割缝筛管的可动组合防砂管 Download PDF

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Publication number
WO2016061707A1
WO2016061707A1 PCT/CN2014/000919 CN2014000919W WO2016061707A1 WO 2016061707 A1 WO2016061707 A1 WO 2016061707A1 CN 2014000919 W CN2014000919 W CN 2014000919W WO 2016061707 A1 WO2016061707 A1 WO 2016061707A1
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Prior art keywords
screen
axial
movable
radial
slit
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PCT/CN2014/000919
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English (en)
French (fr)
Inventor
刘永红
纪仁杰
蔡宝平
张全胜
李小朋
李庆云
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中国石油大学(华东)
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Application filed by 中国石油大学(华东) filed Critical 中国石油大学(华东)
Priority to KR1020157035723A priority Critical patent/KR101670844B1/ko
Priority to US14/899,063 priority patent/US9970270B2/en
Priority to PCT/CN2014/000919 priority patent/WO2016061707A1/zh
Priority to CN201480022706.6A priority patent/CN105723052B/zh
Priority to RU2015151467A priority patent/RU2616952C1/ru
Priority to ZA2016/00376A priority patent/ZA201600376B/en
Publication of WO2016061707A1 publication Critical patent/WO2016061707A1/zh

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    • 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
    • E21B43/086—Screens with preformed openings, e.g. slotted liners
    • 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

Definitions

  • the invention belongs to the field of oil drilling tools, and relates to a movable combined sand control tube for axial and radial slit screens.
  • Sand production in oil wells is a major problem that plagues the exploitation of unconsolidated sandstone reservoirs. It not only causes the production of oil wells to be reduced or stopped, but also aggravates the wear of the ground and downhole equipment. In severe cases, it will cause damage to casings and scrapping of oil wells. According to the report, about 40% of the oil wells in the world need sand control, and this proportion is increasing every year. This is because as the oil field enters the development period of extra high water cut, the production intensity is getting higher and higher, so that the oil well that did not have sand is started. Sand production, the oil well that originally had a slight sand production began to produce a large amount of sand. How to effectively prevent and control sand production in oil wells is a topic of competition for oil exploration countries.
  • Sand control is the main technical measure to solve the problem of sand production in oil wells.
  • about 80% of sand production wells in the world use mechanical sand control methods, and the core component of mechanical sand control is screen.
  • the slotted screen is the most commonly used sand control tool in oilfields at home and abroad.
  • the slit shape is mostly rectangular, that is, the slit width is consistent from the outside to the inside. This kind of screen is easy to cause sand clogging and reduce oil recovery efficiency. And the service life of the screen.
  • the single trapezoidal slot screen can overcome the problem that the rectangular slot screen is easy to generate sand block, but the seam is easy to be worn by the fine sand particles carried by the crude oil, which reduces the effective period of sand control.
  • the precision composite sand control pipe has been well applied in the fine sand sand oil well.
  • the screen consists of an inner perforated pipe, a multi-layer composite sand filter net and an outer protection pipe.
  • the outer protective pipe and the multi-layer composite sand filter net Being welded to the perforated pipe, the disadvantage is that the multi-layer composite sand filter net is easily blocked by the fine sand particles carried by the crude oil, which reduces the oil recovery efficiency, and the fine sand grains after the blockage are difficult to be washed and cleaned, and the welded portion of the pipe body is hot.
  • This kind of screen can not automatically adjust the position between the outer protective pipe and the multi-layer composite sand filter net and the inner perforated pipe according to the sand production and sand control conditions of the formation. Mining efficiency.
  • the movable combined sand control tube of the inventive axial and radial slotted screen tube is composed of a coupling, a movable spacer sleeve, an external movable radial slotted screen tube, a split support ring and an internal part.
  • the axial slotted screen consists of a screen.
  • the outer movable radial slotted screen is at the outermost layer and is mounted on the movable spacer and the split support ring; the coupling is connected to the inner axial slit screen; the movable spacer is installed in the inner axial cut On the sieve tube; the split support ring is installed in the annular groove of the inner axial slit screen; the inner axial slit screen is in the innermost layer, respectively, with the coupling, the movable spacer and the split support The rings are connected.
  • the movable combined sand control pipe of the axial and radial slotted screen is required to be aligned with the oil layer.
  • the sand control screen is shielded by an external radial slotted screen and an internal axial slotted screen.
  • Sand, external radial slotted screen can be freely rotated along the inner axial slotted screen for free axial movement and around the axis of the inner axial slotted screen, which can effectively prevent the anti-sand of the sand In order to keep the oil seepage channel open for a long time and improve the mining efficiency of the oil well.
  • the external radial slotted screen can be freely rotated along the axis of the internal axial slotted screen and around the axis of the internal axial slotted screen, which can effectively prevent the anti-sand of the sand. In order to keep the oil seepage channel open for a long time and improve the mining efficiency of the oil well.
  • the cross-sectional structure shape of the radial slit screen and the axial slit screen of the present invention in the slit width direction is two outer narrow inner wide trapezoidal slits connected in series from the outside to the inside of the tube, and the slit structure is not easy.
  • the internal sand blockage is generated, which can keep the seam unblocked for a long time and improve the mining efficiency of the oil well.
  • Figure 1 is a schematic view showing the outer structure of a movable combined sand control tube for axial and radial slit screens.
  • Figure 2 is a cross-sectional view showing the A-A position in the outline structure of the movable combined sand control tube of the axial and radial slit screen of Figure 1.
  • FIG 3 is a schematic structural view of a split support ring.
  • FIG. 4 is a cross-sectional view of the A-A position in the structural schematic view of the split support ring of FIG. 3.
  • the movable combined sand control tube of the axial and radial slotted screen of the present invention is mainly composed of five parts.
  • 1 is a coupling, a total of two, respectively connected to the two ends of the internal axial slotted screen, on the one hand to limit the axial movement range of the movable spacer and the external movable radial slit screen, the other
  • the utility model relates to the installation and connection function in the sand control operation;
  • 2 is a movable spacer sleeve, which are respectively installed at the two ends of the inner axial slotted screen tube, and they can be used in the axial shoulder of the inner axial slitting screen tube.
  • the axial movement between the coupling and the coupling can be freely rotated around the axis of the inner axial slitting screen for supporting the external movable radial slit screen;
  • 3 is an external movable radial slit screen, the seam
  • the slit in the circumferential direction, the slit width structure in the axial direction is two outer narrow inner wide trapezoidal slits connected in series from the outer tube to the inner side, for sand blocking and providing inflow passage of crude oil, external movable radial
  • the slotted screen is mounted on the movable spacer and the split support ring.
  • the slab of the sand-proof granules keeps the oil-permeable passages open for a long time and improves the mining efficiency of the oil wells; 4 is the split-type branch
  • the retaining ring is installed in the annular groove of the inner axial slitting screen tube.
  • the movable combined sand control tube of the axial and radial slit screen of the present invention has an outer movable radial slit screen at the outermost layer, and the inner axial slit screen is at the innermost layer, and the two are adopted between the two
  • the way of gap superposition is to prevent sand, so that the flow direction of the underground crude oil flowing through the outer radial slit and the inner axial slit is vertical cross-change, which is beneficial to slow down the accumulation of sand-proof particles and improve the mining efficiency of the oil well.
  • the split type support ring is composed of a half ring with a hammer head at both ends and a half ring with a groove at both ends, and two and a half through installation.
  • the ring of the ring and the groove are butted in the ring groove of the inner axial slotted screen.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Earth Drilling (AREA)
  • Filtration Of Liquid (AREA)
  • Harvester Elements (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Centrifugal Separators (AREA)

Abstract

一种轴向和径向割缝筛管的可动组合防砂管，属于石油井下钻采工具领域。该防砂管由接箍（1）、可动隔套（2）、外部可动径向割缝筛管（3）、剖分式支撑环（4）和内部轴向割缝筛管（5）组成。该防砂管采用外部径向割缝筛管和内部轴向割缝筛管进行挡砂，外部径向割缝筛管可沿内部轴向割缝筛管作有限制的轴向移动和绕内部轴向割缝筛管的轴线作自由旋转运动，可有效地防止被防砂粒的板结，使渗油通道长期保持畅通，提高油井的开采效率。

Description

轴向和径向割缝筛管的可动组合防砂管 技术领域
本发明属于石油井下钻采工具领域，涉及一种轴向和径向割缝筛管的可动组合防砂管。
背景技术
油井出砂是困扰疏松砂岩油藏开采的一大难题，它不仅易造成油井的减产、停产，加剧地面和井下设备的磨损，而且严重时还会造成套管的损坏和油井报废。资料报道，全世界需要防砂的油井约有40％，这个比例每年还在递增，这是因为随着油田进入特高含水开发期，采出强度越来越高，使原本不出砂的油井开始出砂，原本轻微出砂的油井开始大量出砂。如何有效地防止和控制油井出砂是各石油开采国竞相研究的课题。
防砂是解决油井出砂问题的主要工艺措施，目前全世界约有80％的出砂油井采用机械防砂方法，机械防砂的核心部件是筛管。割缝筛管是目前国内外油田最为常用的一种防砂工具，其缝形多为矩形，即缝宽从管外至内是一致的，该种筛管易造成缝内砂粒堵塞、降低采油效率和筛管的使用寿命。单梯形缝筛管可以克服矩形缝筛管易产生砂堵的问题，但其缝口易被原油携带的微细砂粒磨损扩大，降低防砂有效期。精密复合防砂管在出细粉砂油井中得到了较好的应用，该种筛管由内打孔管、多层复合滤砂网和外保护管组成，外保护管和多层复合滤砂网被焊接在内打孔管上，其不足之处是多层复合滤砂网易被原油携带的微细砂粒堵塞，降低采油效率，堵塞后的微细砂粒难易被冲刷清理，管体的焊接处在热采油井中使用时易产生破裂损坏，该种筛管不能根据地层出砂与防砂状况自动调整外保护管及多层复合滤砂网与内打孔管间的位置，被防砂粒易板结，降低油井的开采效率。
目前，国内外尚未见轴向和径向割缝筛管的可动组合防砂管的文献报道。
发明内容
本发明的目的在于提供一种轴向和径向割缝筛管的可动组合防砂管，用于油井防砂。
本发明的原理是：所发明的轴向和径向割缝筛管的可动组合防砂管由接箍、可动隔套、外部可动径向割缝筛管、剖分式支撑环和内部轴向割缝筛管组成。外部可动径向割缝筛管处于最外层，安装在可动隔套和剖分式支撑环上；接箍与内部轴向割缝筛管相连；可动隔套安装在内部轴向割缝筛管上；剖分式支撑环安装在内轴向割缝筛管的环槽内；内部轴向割缝筛管处于最内层，分别与接箍、可动隔套和剖分式支撑环相连。井下防砂施工作业时，要求轴向和径向割缝筛管的可动组合防砂管对准油层部位，该种防砂筛管采用外部径向割缝筛管和内部轴向割缝筛管进行挡砂，外部径向割缝筛管可沿内部轴向割缝筛管作有限制的轴向移动和绕内部轴向割缝筛管的轴线作自由旋转运动，可有效地防止被防砂粒的板结，使渗油通道长期保持畅通，提高油井的开采效率。
本发明的优点如下：
1.采用径向割缝筛管和轴向割缝筛管间隙叠加的方式进行油井防砂，使井下原油流经外径向割缝和内轴向割缝时流向产生垂直交叉变化，有利于减缓被防砂粒的堆积板结，提高油 井的开采效率。
2.外部径向割缝筛管可沿内部轴向割缝筛管作有限制的轴向移动和绕内部轴向割缝筛管的轴线作自由旋转运动，可有效地防止被防砂粒的板结，使渗油通道长期保持畅通，提高油井的开采效率。
3.本发明的径向割缝筛管和轴向割缝筛管在缝宽方向的剖面结构形状为从管外至内依次相连的两个外窄内宽梯形缝，该种缝形结构不易产生缝内砂堵，可长期保持缝的畅通，提高油井的开采效率。
附图说明
图1为轴向和径向割缝筛管的可动组合防砂管的外形结构示意图。
图2为图1轴向和径向割缝筛管的可动组合防砂管的外形结构示意图中A-A位置的剖视图。
图3为剖分式支撑环的结构示意图。
图4为图3剖分式支撑环的结构示意图中A-A位置的剖视图。
具体实施方式
参见图1。本发明的轴向和径向割缝筛管的可动组合防砂管主要由五部分组成。1是接箍，共两个，分别与内部轴向割缝筛管的两端相连，一方面用于限制可动隔套和外部可动径向割缝筛管的轴向移动范围，另一方面用于防砂作业时的安装连接作用；2是可动隔套，共两个，分别安装在内部轴向割缝筛管的两端，它们既可在内部轴向割缝筛管的轴肩与接箍间轴向移动，又可绕内部轴向割缝筛管的轴线自由旋转，用于支撑外部可动径向割缝筛管；3是外部可动径向割缝筛管，其缝为圆周方向的缝，沿轴向方向剖面的缝宽结构形状为从外管至内依次相连的两个外窄内宽梯形缝，用于挡砂和提供原油的流入通道，外部可动径向割缝筛管安装在可动隔套和剖分式支撑环上，它既可在两个接箍间轴向移动，又可绕内部轴向割缝筛管的轴线自由旋转，可有效地防止被防砂粒的板结，使渗油通道长期保持畅通，提高油井的开采效率；4是剖分式支撑环，安装在内轴向割缝筛管的环槽内，它由两个半圆环组成，采用榫头和榫槽结构扣紧于内部轴向割缝筛管的环槽内，用于支撑外部可动径向割缝筛管；5是内部轴向割缝筛管，分别与接箍、可动隔套和剖分式支撑环相连，用于挡砂和提供原油的流入通道，以及支撑外部可动径向割缝筛管。
参见图2。本发明的轴向和径向割缝筛管的可动组合防砂管，外部可动径向割缝筛管处于最外层，内部轴向割缝筛管处于最内层，两者之间采用间隙叠加的方式进行防砂，使井下原油流经外径向割缝和内轴向割缝时流向产生垂直交叉变化，有利于减缓被防砂粒的堆积板结，提高油井的开采效率。
参见图3和图4。本发明的轴向和径向割缝筛管的可动组合防砂管，剖分式支撑环由两端带榫头半圆环和两端带榫槽的半圆环组成，安装时通过两个半圆环的榫头和榫槽对接扣紧于内部轴向割缝筛管的环槽内。

Claims (3)

  1. 一种轴向和径向割缝筛管的可动组合防砂管，该防砂筛管由接箍(1)、可动隔套(2)、外部可动径向割缝筛管(3)、剖分式支撑环(4)和内部轴向割缝筛管(5)组成，其特征在于：两个接箍(1)分别与内部轴向割缝筛管(5)的两端相连；两个可动隔套(2)分别安装在内部轴向割缝筛管(5)的两端，可动隔套(2)既可在内部轴向割缝筛管(5)的轴肩与接箍(1)间轴向移动，又可绕内部轴向割缝筛管(5)的轴线自由旋转；外部可动径向割缝筛管(3)安装在可动隔套(2)和剖分式支撑环(4)上，外部可动径向割缝筛管(3)既可在两个接箍(1)间轴向移动，又可绕内部轴向割缝筛管(5)的轴线自由旋转；剖分式支撑环(4)安装在内轴向割缝筛管(5)的环槽内；内部轴向割缝筛管(5)分别与接箍(1)、可动隔套(2)和剖分式支撑环(4)相连。
  2. 如权利要求1所述的轴向和径向割缝筛管的可动组合防砂管，其特征在于：外部可动径向割缝筛管的缝为圆周方向的缝，沿轴向方向剖面的缝宽结构形状为从外管至内依次相连的两个外窄内宽梯形缝。
  3. 如权利要求1所述的轴向和径向割缝筛管的可动组合防砂管，其特征在于：剖分式支撑环(4)由两端带榫头半圆环和两端带榫槽的半圆环组成，安装时通过两个半圆环的榫头和榫槽对接扣紧于内部轴向割缝筛管(5)的环槽内。
PCT/CN2014/000919 2014-10-20 2014-10-20 轴向和径向割缝筛管的可动组合防砂管 WO2016061707A1 (zh)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1020157035723A KR101670844B1 (ko) 2014-10-20 2014-10-20 축방향 및 반경 방향의 슬롯 스크린 파이프의 이동식 조합 모래 처리 파이프
US14/899,063 US9970270B2 (en) 2014-10-20 2014-10-20 Movable combined sand control pipe of axial and radial slotted screen pipes
PCT/CN2014/000919 WO2016061707A1 (zh) 2014-10-20 2014-10-20 轴向和径向割缝筛管的可动组合防砂管
CN201480022706.6A CN105723052B (zh) 2014-10-20 2014-10-20 轴向和径向割缝筛管的可动组合防砂管
RU2015151467A RU2616952C1 (ru) 2014-10-20 2014-10-20 Подвижная комбинированная труба для борьбы с пескопроявлением, содержащая фильтры с осевыми и радиальными щелями
ZA2016/00376A ZA201600376B (en) 2014-10-20 2016-01-18 Movable combined sand control pipe of axial and radial slotted screen pipes

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PCT/CN2014/000919 WO2016061707A1 (zh) 2014-10-20 2014-10-20 轴向和径向割缝筛管的可动组合防砂管

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US (1) US9970270B2 (zh)
KR (1) KR101670844B1 (zh)
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RU (1) RU2616952C1 (zh)
WO (1) WO2016061707A1 (zh)
ZA (1) ZA201600376B (zh)

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CN113187445A (zh) * 2020-01-14 2021-07-30 中国石油天然气股份有限公司 防砂筛管及其设计方法
CN114575795A (zh) * 2020-11-30 2022-06-03 中国石油天然气股份有限公司 挡砂精度能调节的自清洁型防砂筛管及其使用方法

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CN107461177B (zh) * 2017-09-04 2023-05-26 长江大学 一种压控式筛管装置
CN108050252A (zh) * 2017-12-22 2018-05-18 湖南机电职业技术学院 填料压盖
CN108561109A (zh) * 2018-01-11 2018-09-21 中国石油大学(华东) 一种可沿轴线旋转的组合割缝筛管
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