WO2017084225A1 - 电缆式静压座封工具 - Google Patents

电缆式静压座封工具 Download PDF

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Publication number
WO2017084225A1
WO2017084225A1 PCT/CN2016/076346 CN2016076346W WO2017084225A1 WO 2017084225 A1 WO2017084225 A1 WO 2017084225A1 CN 2016076346 W CN2016076346 W CN 2016076346W WO 2017084225 A1 WO2017084225 A1 WO 2017084225A1
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pressure piston
oil
module
low
piston
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PCT/CN2016/076346
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English (en)
French (fr)
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生凯章
单永斌
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北京美高科技发展有限公司
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Publication of WO2017084225A1 publication Critical patent/WO2017084225A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type

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  • the invention relates to a petroleum downhole setting tool, in particular to a cable type static pressure sealing tool.
  • the product design of the downhole setting tool is mainly derived from the oil collection and stimulation process. In the process of layered oil recovery, fracturing and acidizing, it is combined with the corresponding packer or bridge plug to complete the setting operation and its market.
  • the demand is large and has broad application prospects.
  • the downhole setting tool mainly adopts the pyrotechnic type, which is to use the electric signal to detonate the explosive to promote the movement of the piston, thereby achieving the setting and losing hands.
  • the pyrotechnic type which is to use the electric signal to detonate the explosive to promote the movement of the piston, thereby achieving the setting and losing hands.
  • it is more dangerous to use the electric signal to detonate the explosive.
  • production accidents may occur, or oil and gas wells may be scrapped, and there is a big safety hazard in the storage and transportation of gunpowder. Explosives may easily damage the packer or bridge plug, which greatly reduces the packer or bridge plug. Repeated utilization and service life.
  • the packer utilizes the absolute pressure generated by the explosive explosion, as the depth of the seal is deepened, the amount of explosives to be filled is required to be more and more, and the safety hazard It is also growing and becoming a huge obstacle to safe production.
  • the main object of the present invention is to provide a cable type static pressure sealing tool.
  • the modular design is adopted, and the automatic pressure boosting function is realized by using the boosting module technology, and the large-diameter low-pressure piston and small are utilized.
  • the area ratio of the high-pressure piston of the caliber is the maximum supercharging effect with the initial pressure, and the setting operation is completed by the execution module to achieve the strong static pressure, the structure is simple, safe and reliable, and the manufacturing cost is low, thereby making up for the existing technology. insufficient.
  • a cable type static pressure seat seal The tool comprises a ring pressure introduction module, an oil source oil return module and an execution module, and further comprises a pressure increasing module, wherein the ring pressure introducing module, the oil source oil returning module, the pressure increasing module and the execution module are sequentially arranged from front to back.
  • the supercharging module is composed of a high pressure piston oil control pipe, a low pressure piston oil control pipe, a fuel supply pipeline, a return oil pipeline, a hydraulic control reversing valve, a low pressure piston, a high pressure piston, a check valve assembly, and the hydraulic control reversing valve,
  • the low-pressure piston, the high-pressure piston and the one-way valve assembly are sequentially disposed in a corresponding housing of the boosting module, and the high-pressure piston oil control tube, the low-pressure piston oil control tube, the oil supply line and the oil return line are respectively disposed in the corresponding housings in.
  • the middle end of the oil supply pipeline communicates with the liquid control reversing valve P through a low pressure piston oil control pipe, and the rear end of the oil supply pipeline is connected with the rear end of the high pressure piston; the front end of the oil return pipeline and the hydraulic control reversing valve
  • the T port is connected, the rear end of the oil return pipe is connected with the rear end of the low pressure piston; the front end of the high pressure piston is connected with the rear end of the low pressure piston, and the rear end of the high pressure piston is connected with the liquid control reversing valve K through the high pressure piston oil control pipe.
  • the front end of the low pressure piston is in communication with the liquid control reversing valve A port.
  • the diameter of the low pressure piston is greater than or equal to twice the diameter of the high pressure piston.
  • the utility model adopts the above technical solution: a cable type static pressure sealing tool, through the technical scheme, adopts a modular design, realizes an automatic pressure boosting function by using a boosting module technology, and utilizes a large diameter low pressure piston and a small diameter
  • the area ratio of the high-pressure piston is the maximum supercharging effect with the initial pressure, and the sealing operation is completed by the execution module to achieve strong static pressure, the structure is simple, safe and reliable, the production cost is low, the thrust is large, the use is safe, and the performance is stable. High reliability and good economical characteristics. It adopts modular design and features high interchangeability and convenient maintenance.
  • Figure 1 is a schematic view of the overall structure of the present invention.
  • Figure 2 is a left side view of Figure 1.
  • FIG. 3 is a schematic structural view of a ring pressure introduction module in the present invention.
  • FIG. 4 is a schematic structural view of an oil source oil return module according to the present invention.
  • FIG. 5 is a cross-sectional view of the pressurizing module of FIG. 2 taken along the line A-A.
  • FIG. 6 is a cross-sectional view showing the B-B of the pressurizing module of FIG. 2.
  • Figure 7 is an enlarged schematic view of the hydraulically controlled directional control valve of Figure 5.
  • FIG. 8 is a schematic structural diagram of an execution module in the present invention.
  • the present invention relates to a cable static pressure sealing tool, comprising a ring pressure introduction module 2, an oil source oil return module 3 and an execution module 4, and a pressure increasing module 5, wherein the ring pressure is
  • the introduction module 2 the oil source oil return module 3, the pressure increasing module 5 and the execution module 4 are sequentially arranged from front to back, and the pressure increasing module 5 is composed of a high pressure piston oil control tube 18, a low pressure piston oil control tube 19, and an oil supply line 6.
  • the high pressure piston oil control tube 18, the low pressure piston oil control tube 19, the oil supply line 6 and the oil return line 7 are respectively disposed in the corresponding housing 1 in the housing 1 corresponding to the pressure increasing module 5.
  • the middle end of the oil supply pipe 6 communicates with the hydraulic control valve P port 15 through the low pressure piston oil control pipe 19, and the rear end of the oil supply pipe 6 communicates with the rear end of the high pressure piston 10; the front end of the oil return pipe 6
  • the first end of the return line 6 communicates with the rear end of the low pressure piston 9; the front end of the high pressure piston 10 is connected with the rear end of the low pressure piston 9, and the rear end of the high pressure piston 10 passes through the high pressure piston.
  • the oil control pipe 18 is in communication with the hydraulic control valve K port 14; the front end of the low pressure piston 9 is in communication with the hydraulic control valve A port 16.
  • the diameter of the low pressure piston 9 is greater than or equal to twice the diameter of the high pressure piston.
  • the ring pressure introduction module 2, the oil source oil return module 3, and the execution module 4 in the present invention are prior art, and the working principle thereof is a well-known technology, and the details are not repeated herein.
  • the ground control system gives a command signal to drive the ring pressure introducing module 2 to work, and the initial pressure enters the main piston 12 in the execution module 4 through the pipeline.
  • the rod cavity, the main piston 12 moves, thereby providing the sealing force required for the downhole sealing bridge plug; when the seat is completed and the hand is lost, the load is established, and the pressure oil at the rear end of the high pressure piston 10 acts through the high pressure piston oil control tube 18.
  • liquid control reversing valve hydraulic control K port 14 when the pressure reaches a certain value, the oil return valve core is closed, the main valve core is opened, the hydraulic control reversing valve P port and the hydraulic control reversing valve A are connected to realize the oil From the oil supply line 6 through the low pressure piston oil control pipe 19 into the front end of the low pressure piston 9, since there is an area ratio of nearly 4:1 between the low pressure piston 9 and the high pressure piston 10, it is known from the principle of equal force that the low pressure piston 9 pushes the high pressure.
  • the front end of the high pressure piston 10 can obtain a high pressure ratio of nearly 4:1, so that the high pressure oil passes through the check valve assembly 11 and acts on the rodless cavity of the main piston 12 to achieve the purpose of thrust amplification. Realize and complete the work of losing pressure on the static pressure.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

一种电缆式静压座封工具，包括环压引入模块（2）、油源回油模块（3）和执行模块（4），其特征在于，还包括增压模块（5），所述环压引入模块、油源回油模块、增压模块和执行模块由前向后依次设置，所述增压模块由高压活塞控油管（18）、低压活塞控油管（19）、供油管路（6）、回油管路（7）、液控换向阀（8）、低压活塞（9）、高压活塞（10）、单向阀组件（11）构成，所述液控换向阀、低压活塞、高压活塞和单向阀组件依次设置在增压模块所对应的壳体内，所述高压活塞控油管、低压活塞控油管、供油管路和回油管路分别设置在所对应的壳体（1）中。

Description

电缆式静压座封工具 技术领域
本发明涉及一种石油井下坐封工具，特别是涉及一种电缆式静压座封工具。
背景技术
井下坐封工具产品设计主要来源于石油采集及增产工艺，在对井下分层采油，压裂、酸化等工艺过程中，与相应的封隔器或桥塞组合起来，完成坐封作业，其市场需求量大，有广阔的应用前景。
当前，井下坐封工具主要采用火工品式，就是利用电信号引爆炸药的方式推动活塞运动，从而实现坐封和丢手动作，在高温高压环境下，用电信号引爆炸药比较危险，稍有不慎就有可能发生生产事故，或使油气井报废，并且火药存储和运输存在较大的安全隐患，采用炸药爆炸容易损坏封隔器或桥塞，而大大降低了封隔器或桥塞的重复利用率和使用寿命，再者，由于封隔器利用的是炸药爆炸产生的绝对压力，因此随着坐封深度的不断加深，需要填充的炸药用量则要求越来越多，随之安全隐患也越来越大，并且成为安全生产的巨大障碍。
由于上述的原因，人们采用电缆方式传送到井下，在井下利用液压方式所产生的推力进行井下的坐封工作，由于推力较小，人们大多采用多级缸的组合合力进行工作，然尔，多级缸组合，液压缸是通过螺纹连接或者其他方式组合在一起，活塞杆通过螺纹连接或者铰接等其他方式连接在一起，该结构的轴向多级组合，对其工件的同轴度要求较高，大大增加了加工难度，提高了加工成本，经济性差，在使用中易出来卡死现象，从而影响整个系统的工作稳定性。
技术问题
有鉴于此，本发明的主要目的在于提供一种电缆式静压座封工具，通过本技术方案，采用模块化设计，利用增压模块技术实现自动增压功能，利用大口径的低压活塞和小口径的高压活塞的面积比实现与初始压力最大的增压效果，并通过执行模块完成坐封作业，以实现大力静压，结构简单、安全可靠，制作成本低，从而弥补现有技术中存在的不足。
技术解决方案
为了达到上述目的，本发明的技术方案是这样实现的：一种电缆式静压座封 工具，包括环压引入模块、油源回油模块和执行模块，还包括增压模块，所述环压引入模块、油源回油模块、增压模块和执行模块由前向后依次设置，所述增压模块由高压活塞控油管、低压活塞控油管、供油管路、回油管路、液控换向阀、低压活塞、高压活塞、单向阀组件构成，所述液控换向阀、低压活塞、高压活塞和单向阀组件依次设置在增压模块所对应的壳体内，所述高压活塞控油管、低压活塞控油管、供油管路和回油管路分别设置在所对应的壳体中。
所述供油管路中端通过低压活塞控油管与液控换向阀P口相连通，供油管路后端与高压活塞后端相连通；所述回油管路前端与液控换向阀T口相连通，回油管路后端与低压活塞后端相连通；所述高压活塞前端与低压活塞后端相连接，高压活塞后端通过高压活塞控油管与液控换向阀K口相连通；所述低压活塞前端与液控换向阀A口相连通。
所述低压活塞的直径大于等于高压活塞直径的2倍。
有益效果
采用上述技术方案后的有益效果是：一种电缆式静压座封工具，通过本技术方案，采用模块化设计，利用增压模块技术实现自动增压功能，利用大口径的低压活塞和小口径的高压活塞的面积比实现与初始压力最大的增压效果，并通过执行模块完成坐封作业，以实现大力静压，结构简单、安全可靠，制作成本低，具备推力大、使用安全、性能稳定、可靠性高、经济性好的特点，通过采用模块化设计，具有较高的互换性和维修方便的特点。
附图说明
图1为本发明的整体结构示意图。
图2为图1的左视图。
图3为本发明中环压引入模块的结构示意图。
图4为本发明中油源回油模块的结构示意图。
图5为图2中增压模块的A-A向剖视示意图。
图6为图2中增压模块的B-B向剖视示意图。
图7为图5中液控换向阀的放大示意图。
图8为本发明中执行模块的结构示意图。
图中，1壳体、2环压引入模块、3油源回油模块、4执行模块、5增压模块、 6供油管路、7回油管路、8液控换向阀、9低压活塞、10高压活塞、11单向阀组件、12主活塞、13单向阀、14液控换向阀K口、15液控换向阀P口、16液控换向阀A口、17液控换向阀T口、18高压活塞控油管、19低压活塞控油管。
本发明的实施方式
下面将结合附图对本发明中具体实施例作进一步详细说明。
如图1-图8所示，本发明涉及的电缆式静压座封工具，包括环压引入模块2、油源回油模块3和执行模块4，还包括增压模块5，所述环压引入模块2、油源回油模块3、增压模块5和执行模块4由前向后依次设置，所述增压模块5由高压活塞控油管18、低压活塞控油管19、供油管路6、回油管路7、液控换向阀8、低压活塞9、高压活塞10和单向阀组件11构成，所述液控换向阀8、低压活塞9、高压活塞10和单向阀组件11依次设置在增压模块5所对应壳体1内，所述高压活塞控油管18、低压活塞控油管19、供油管路6和回油管路7分别设置在所对应的壳体1中。
所述供油管路6中端通过低压活塞控油管19与液控换向阀P口15相连通，供油管路6后端与高压活塞10后端相连通；所述回油管路6前端与液控换向阀T口17相连通，回油管路6后端与低压活塞9后端相连通；所述高压活塞10前端与低压活塞9后端相连接，高压活塞10后端通过高压活塞控油管18与液控换向阀K口14相连通；所述低压活塞9前端与液控换向阀A口16相连通。
所述低压活塞9的直径大于等于高压活塞的直径2倍。
本发明中的环压引入模块2、油源回油模块3、执行模块4为现有技术，其工作原理为公知技术，在此不再重复赘述。
本发明在工作时，坐封工具下入到指定的坐封位置后，地面控制系统给出指令信号驱动环压引入模块2工作，初始压力通过管路进入执行模块4中的主活塞12的无杆腔，主活塞12移动，从而提供井下坐封桥塞所需的坐封力；当坐封完成实行丢手时，此时负载建立，高压活塞10后端的压力油通过高压活塞控油管18作用于液控换向阀液控K口14，当其压力达到一定值时回油阀芯关闭，主阀芯开启，液控换向阀P口和液控换向阀A口连通，实现油液从供油管路6通过低压活塞控油管19进入低压活塞9的前端，由于低压活塞9和高压活塞10之间存在近4:1的面积比，由作用力相等原理可知，低压活塞9推动高压活塞10一 起向前端运动，高压活塞10的前端能够获得近4:1的高增压比，使高压油经过单向阀组件11后作用于主活塞12的无杆腔中，达到推力放大的目的，从而实现并完成大力静压丢手作业。
以上所述，仅为本发明的较佳可行实施例而已，并非用以限定本发明的范围。

Claims (3)

  1. 一种电缆式静压座封工具，包括环压引入模块、油源回油模块和执行模块，其特征在于，还包括增压模块，所述环压引入模块、油源回油模块、增压模块和执行模块由前向后依次设置，所述增压模块由高压活塞控油管、低压活塞控油管、供油管路、回油管路、液控换向阀、低压活塞、高压活塞、单向阀组件构成，所述液控换向阀、低压活塞、高压活塞和单向阀组件依次设置在增压模块所对应的壳体内，所述高压活塞控油管、低压活塞控油管、供油管路和回油管路分别设置在所对应的壳体中。
  2. 根据权利要求1所述的电缆式静压座封工具，其特征在于，所述供油管路中端通过低压活塞控油管与液控换向阀P口相连通，供油管路后端与高压活塞后端相连通；所述回油管路前端与液控换向阀T口相连通，回油管路后端与低压活塞后端相连通；所述高压活塞前端与低压活塞后端相连接，高压活塞后端通过高压活塞控油管与液控换向阀K口相连通；所述低压活塞前端与液控换向阀A口相连通。
  3. 根据权利要求1所述的电缆式静压座封工具，其特征在于，所述低压活塞的直径大于等于高压活塞直径的2倍。
PCT/CN2016/076346 2015-11-19 2016-03-15 电缆式静压座封工具 WO2017084225A1 (zh)

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