WO2014086233A1 - 一种地层测试器的推靠解卡短节及装置 - Google Patents

一种地层测试器的推靠解卡短节及装置 Download PDF

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Publication number
WO2014086233A1
WO2014086233A1 PCT/CN2013/087485 CN2013087485W WO2014086233A1 WO 2014086233 A1 WO2014086233 A1 WO 2014086233A1 CN 2013087485 W CN2013087485 W CN 2013087485W WO 2014086233 A1 WO2014086233 A1 WO 2014086233A1
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WO
WIPO (PCT)
Prior art keywords
release
push
arm
reversing valve
way reversing
Prior art date
Application number
PCT/CN2013/087485
Other languages
English (en)
French (fr)
Inventor
秦小飞
冯永仁
宋万广
褚晓冬
Original Assignee
中国海洋石油总公司
中海油田服务股份有限公司
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.)
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Publication date
Application filed by 中国海洋石油总公司, 中海油田服务股份有限公司 filed Critical 中国海洋石油总公司
Priority to CA2893572A priority Critical patent/CA2893572C/en
Priority to US14/649,343 priority patent/US9982816B2/en
Publication of WO2014086233A1 publication Critical patent/WO2014086233A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/10—Obtaining fluid samples or testing fluids, in boreholes or wells using side-wall fluid samplers or testers

Definitions

  • the present invention relates to a formation testing apparatus, and more particularly to a push-to-release card stub and apparatus for a formation tester.
  • the formation tester has a push-on setting device that includes a probe and a support arm. When working underground, the probe and support arm pushed against the setting device open, contact the well wall and form a seat.
  • the logging time can be several hours, sometimes even tens of hours.
  • the pressure difference between the formation pressure and the wellbore slurry column reaches 1 OMPa or more, long-term operation is performed at a fixed point, which easily causes the formation tester to stick under the well. After the formation tester encounters the card, the test must be interrupted and the instrument salvage, which increases the test cost and affects the normal operation of the test.
  • the DFDT mid-stream oil and gas layer tester uses a dual probe and dual support arm design.
  • the reliable push mechanism ensures that the cable logging can be relaxed during long-term operation of the instrument, avoiding the mud adsorption cable encountering the card, greatly reducing
  • the formation tester has a chance of encountering the card.
  • the EFDT instrument itself will also encounter the differential pressure stuck card. At this time, even if the cable logging is relaxed, the instrument cannot be avoided. . Therefore, the loose cable anti-card technology used in the mid-stream oil and gas layer tester cannot solve the problem of sticking the card itself.
  • the present invention provides a push-to-defect card short section of a formation tester, including:
  • a first release arm having a retracting cavity and an extended cavity; a two-way reversing valve that can communicate with a pressure oil bus of the hydraulic system;
  • a first three-way reversing valve that can communicate with an accumulator chamber of the accumulator and the two-way reversing valve; a third three-way reversing valve that is connectable to the pressure oil bus and the return oil bus of the hydraulic system;
  • the retracting cavity of the first release arm is connected to the first three port reversing port, and the extending cavity of the first card releasing arm is connected to the third three port reversing valve.
  • the push-to-release card stub may further include: a second release arm having a retraction cavity and an extension cavity; and a second three-port reversing valve connectable to the pressure oil bus of the hydraulic system And a returning oil bus; the retracting cavity of the second unlocking arm is connectable with the first three-port reversing valve, and the extending cavity of the second disengaging arm is connectable with the second three-way reversing valve Connected.
  • the extending direction of the second release arm may be different from the extending direction of the first release arm.
  • the extending direction of the second release arm may be opposite to the extending direction of the first release arm.
  • a hydraulic pressure sensor may be disposed on the accumulator chamber line of the accumulator.
  • the present invention also provides a push-to-release device for a formation tester comprising at least one push-to-release card nipple as previously described.
  • the extending direction of the first release arm of the push-to-pull sub-segment may be different from the extending direction of the formation tester probe and the extending direction of the support arm.
  • the extending direction of the second release arm of the push-to-release nipple may be perpendicular to the extending direction of the formation tester probe or the extending direction of the support arm.
  • the invention can effectively solve the problem of solving the problem of mud stuck in the middle of the drilling oil and gas layer tester, improve the safety of the well tester logging, and minimize the operation risk of the formation tester in the underground. .
  • FIG. 1 is a schematic view showing the operation of the push-to-release card short section of the formation tester in an extended state according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing the operation of the push-to-release card short section of the formation tester in the retracted state according to the embodiment of the present invention
  • FIG. 3 is a schematic view showing the installation and construction of the push-to-release device of the formation tester according to the embodiment of the present invention
  • FIG. 4 is a schematic side view showing the installation and construction of the push-to-release device of the formation tester according to the embodiment of the present invention.
  • the push-and-release card short section of the embodiment of the present invention mainly includes a first release arm 1, a first three-way reversing valve VI, a two-way reversing valve V2, and a third three-way reversing valve V4. and many more.
  • the retraction chamber Q11 of the first release arm 1 (with the rod cavity) is connected to the first three-port reversing valve VI of the accumulator chamber NQ and the two-way reversing valve V2 which can be connected to the accumulator.
  • the other end of the two-way reversing valve V2 can be connected to the pressure oil bus G2 of the hydraulic system via a pressure oil line.
  • the extension chamber Q12 of the first release arm 1 (the rodless chamber) is connected to the pressure oil bus G2 of the connectable hydraulic system and the third three-way selector valve V4 of the return oil bus G1.
  • a hydraulic pressure sensor S1 is disposed on the energy storage chamber NQ pipeline of the accumulator, and the hydraulic pressure sensor S1 monitors the energy storage of the accumulator in real time.
  • the pressure of the cavity NQ is a hydraulic pressure sensor S1 disposed on the energy storage chamber NQ pipeline of the accumulator, and the hydraulic pressure sensor S1 monitors the energy storage of the accumulator in real time. The pressure of the cavity NQ.
  • the push-to-release card sub-section of the embodiment of the present invention can be installed above or below the EFDT probe short section (including the EFDT single probe short section or the double probe short section, etc.).
  • the extension direction of the first release arm 1 and the extension direction and support of the probe in the probe short section The extension directions of the arms are different.
  • the direction in which the probe protrudes in the probe nip is opposite to the direction in which the support arm extends.
  • the extension direction of the first release arm 1 is preferably the extension direction of the probe or the extension of the support arm in the probe short section.
  • the direction is vertical.
  • the direction of extension of the first release arm 1 is simultaneously perpendicular to the direction of the axis of the push-to-release nipple. In this way, when the EFDT probe sticks to the card, the first card release arm can be controlled to extend, and a lateral thrust is applied to the EFDT instrument to unlock the instrument.
  • the push-to-release card short section of the embodiment of the present invention reversing the first three-port reversing valve VI when the first release arm 1 needs to extend the card release, and the first release arm 1 is
  • the recovery chamber Q11 is in communication with the oil return bus line G1 of the hydraulic system, and the third three-port reversing valve V4 is reversed, and the first release arm 1 is extended out of the chamber Q12 to communicate with the pressure oil bus line G2 of the hydraulic system, and the pressure oil bus is utilized.
  • the high pressure hydraulic oil in G2 pushes out the first release arm 1 until it contacts the well wall for unlocking or reaches the maximum extension distance of the first release arm 1.
  • the first release arm 1 When the first release arm 1 contacts the wall of the well to perform the card release, the first release arm 1 forms an angle with the SET of the short section of the EFDT probe (preferably forming a right angle), and is applied to the instrument under the differential pressure stuck card. A lateral thrust that unlocks the instrument.
  • V4 reversing, connecting the extension chamber Q12 of the first release arm 1 and the oil return bus line G1 of the hydraulic system, reversing the first three-port reversing valve VI, and retracting the retracting cavity Ql l of the first release arm i Energy storage chamber
  • the bus G3 shown in Figs. 1 and 2 is a sample bus.
  • the push-to-release card sub-section of the embodiment of the present invention may further include a second release arm 2 and a second three-way changeover valve V3.
  • the extension direction of the second release arm 2 is different from the extension direction of the first release arm 1 (in fact, it is also possible that the extension directions of the two are the same).
  • the extension direction of the second release arm 2 is opposite to the extension direction of the first release arm 1.
  • the retracting chamber Q21 of the second de-arming arm 2 (with the rod chamber) is connected to the first three-port reversing valve VI of the accumulator chamber NQ and the two-way reversing valve V2 which can be connected to the accumulator.
  • the extension chamber Q22 of the second release arm 2 (the rodless chamber) is connected to the pressure oil bus G2 of the connectable hydraulic system and the second three-way selector valve V3 of the return oil bus G1. Accordingly, the extension and retraction of the first release arm 1 and the second release arm 2 can be individually controlled.
  • one of the two release arms can be fully extended.
  • the wall of the well can not be touched, so that the pushing reaction force cannot be formed, and the push-to-release effect cannot be achieved.
  • the support arm on the other side is extended, so that the push-side reaction force is formed by the other side contacting the well wall to ensure successful card release.
  • the push-to-release card stub of the embodiment of the present invention comprising two card-removing arms is connected to the EFDT (unified to be attached to the EFDT instrument, since not only the short section of the probe is connected, but the other end also needs to be connected to the other Short joint connection)
  • the instrument is unlocked, one of the release arms can be controlled to extend laterally to release the card. After the card is successfully released, the card release arm is retracted and the instrument is lifted.
  • another release arm can be extended at this time, from another Push the card in one direction to improve the success rate of the card.
  • the accumulator chamber NQ is always under pressure and the pressure value of the accumulator chamber NQ can be obtained by monitoring the hydraulic pressure sensor S1.
  • the first three-way reversing valve VI can automatically connect the accumulator chamber NQ of the accumulator and the retracting arm retracting chamber, and the disengagement arm will be automatically Retracted to ensure the safety of the formation tester in the underground.
  • the modular design of the push-to-card short section of the embodiment of the present invention enables quick compatibility and seamless connection with the EFDT instrument through mechanical, hydraulic and electrical control bus design.
  • a push-to-release card short section can be installed above and below the short section of the EFDT probe.
  • the push-to-release device of the formation tester of the embodiment of the present invention mainly includes at least one first push-to-release card short section 31 and below which are installed in pairs above the EFDT probe short section 30. At least one second pushes against the card slip section 32.
  • the embodiment of the present invention is described by taking a first push-to-release card short section 31 and a second push-to-release card short section 32 as an example.
  • the structure and working principle of the first push release card section 31 and the second push release card short section 32 are the same. Please refer to the push and release card short section of the embodiment of the present invention shown in FIG. 1 and FIG.
  • the two push-to-release card short sections each include at least one card release arm.
  • the first push-to-release card sub-section 31 includes a first release arm 41 and a second
  • the card release arm 42 has opposite extension directions of the two release arms.
  • the second push release card stub 32 also includes a first release arm 41 and a second release arm 42.
  • the two release arms extend in opposite directions and are opposite to the first push release slip 31.
  • the protruding directions of the card releasing arms correspond to the same or parallel.
  • the first push-pull arm 31 and the second push-to-release card baffle 32 have their respective disengagement arms, the direction (actually, the extension directions of the two disengagement arms on the unloading sub-segment It is also possible to extend the direction of the probe of the EFDT probe 30 or the extension of the support arm.
  • the extension directions of the two release arms of the first push-to-release nipple 31 are perpendicular to the extension direction of the probe 51 or the support arm 52 of the EFDT probe nipple 30, and the second push-to-release nipple
  • the extension direction of the two release arms of 32 is also perpendicular to the direction in which the probe 51 of the EFDT probe stub 30 or the support arm 52 is extended.
  • the respective undirecting disengagement arms are preferably extended above and below the EFDT probe sub-section 30.
  • the card can be pushed from one direction first. If the card cannot be unlocked, the card can be pushed and released again from the other direction, thereby improving the success rate of the card.
  • the embodiment of the invention can automatically retract the disengagement arm in the extended state in an emergency situation, and can be hydraulically locked in the retracting direction when not pushing, which does not cause self-expansion, and ensures the safety of the formation tester.
  • the embodiment of the present invention can effectively solve the problem of solving the problem of mud sticking in the mid-drilling oil and gas layer tester by the formation tester, thereby improving the safety of the formation tester and reducing the formation. The risk of the tester working underground.

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Abstract

一种地层测试器的推靠解卡短节，包括第一解卡臂（1）、第一三口换向阀组（V1）、二口换向阀组（V2）以及第三三口换向阀组（V4），第一解卡臂（1）的收回腔（Q11）与可连通蓄能器的蓄能腔（NQ）和二口换向阀组（V2）的第一三口换向阀组（V1）相连，二口换向阀组（V2）可连通液压系统的压力油总线（G2），第一解卡臂（1）的伸出腔（Q12）与可连通液压系统的压力油总线（G2）及回油总线（G1）的第三三口换向阀组（V4）相连。该解卡短节有效地解决钻井中途油气层测试仪泥浆粘附遇卡时的解卡问题。

Description

一种地层测试器的推靠解卡短节及装置
技术领域
本发明涉及一种地层测试装置， 尤其涉及一种地层测试器的推靠解卡短 节及装置。
背景技术
电缆式地层测试器因仪器结构和作业要求， 容易导致仪器遇卡。 地层测 试器具有推靠坐封装置， 该装置包括探头和支撑臂。 在井下作业时， 推靠坐 封装置的探头和支撑臂张开， 接触井壁并形成坐封。
在井下某一固定点位进行测压取样时， 测井时间长达数小时， 有时甚至 数十小时。特别是泥浆比重较大，导致地层压力和井筒泥浆柱压力差达 1 OMPa 以上时， 在固定点位进行长时间作业， 这^容易导致地层测试器在井下粘卡。 地层测试器遇卡后必须中断测试， 进行仪器打捞， 从而增加了测试成本， 影 响了测试工作的正常进行。
钻井中途油气层测试仪（EFDT )釆用了双探针和双支撑臂设计， 可靠的 推靠机构保证了仪器井下长时间作业时能放松电缆测井， 避免泥浆吸附电缆 遇卡， 大大减小了地层测试器遇卡几率。 但在地层压力和井筒泥浆柱压力压 差过大、 且泥饼较厚的井中， EFDT仪器本身也会遇到压差粘卡的情况， 这 时候即使放松电缆测井， 也不能避免仪器遇卡。 因此， 目前钻井中途油气层 测试仪釆用的放松电缆防卡技术不能解决仪器本身粘附遇卡问题。
发明内容
为了解决现有技术存在的问题， 本发明提供了一种地层测试器的推靠解 卡短节， 包括：
第一解卡臂， 其具有收回腔及伸出腔； 二口换向阀， 其可连通液压系统的压力油总线；
第一三口换向阀， 其可连通蓄能器的蓄能腔和所述二口换向阀； 以及 第三三口换向阀， 其可连通所述液压系统的压力油总线及回油总线； 其 中：
所述第一解卡臂的收回腔与所述第一三口换向阃相连， 所述第一解卡臂 的伸出腔与所述第三三口换向阀相连。
优选地， 所述推靠解卡短节还可包括： 第二解卡臂， 其具有收回腔及伸 出腔； 以及第二三口换向阀， 其可连通所述液压系统的压力油总线以及回油 总线； 所述第二解卡臂的收回腔可与所述第一三口换向阀相连， 所述第二解 卡臂的伸出腔可与所述第二三口换向阀相连。
优选地， 所述第二解卡臂的伸出方向可与所述第一解卡臂的伸出方向不 同。
优选地， 所述第二解卡臂的伸出方向可与所述第一解卡臂的伸出方向相 反。
优选地， 所述蓄能器的蓄能腔管线上可设置有液压压力传感器。
本发明还提供了一种地层测试器的推靠解卡装置， 包括至少一个如前所 述的推靠解卡短节。
优选地， 所述推靠解卡短节的第一解卡臂的伸出方向可与所述地层测试 器探头的伸出方向及支撑臂的伸出方向不同。
优选地， 所述推靠解卡短节的第二解卡臂的伸出方向可与所述地层测试 器探头的伸出方向或者支撑臂的伸出方向垂直。
与相关技术相比， 本发明可以有效地解决钻井中途油气层测试仪泥浆粘 附遇卡时的解卡问题， 提高地层测试器测井的安全性， 尽可能降低地层测试 器在井下的作业风险。
本发明的其它特征和优点将在随后的说明书中阐述， 并且， 部分地从说 明书中变得明显， 或者通过实施本发明而了解。 本发明的目的和其他优点可 通过在说明书、 权利要求书以及附图中所特别指出的结构来实现和获得。 附图概述
附图用来提供对本发明技术方案的进一步理解， 并且构成说明书的一部 分， 与本发明实施例一起用于解释本发明的技术方案， 并不构成对本发明技 术方案的限制。
图 1为本发明实施例的地层测试器的推靠解卡短节在伸出状态下的工作 示意图；
图 2为本发明实施例的地层测试器的推靠解卡短节在收回状态下的工作 示意图；
图 3为本发明实施例的地层测试器的推靠解卡装置的安装及构造示意图; 图 4为本发明实施例的地层测试器的推靠解卡装置在安装及构造的侧面 示意图。 本发明的较佳实施方式
以下将结合附图及实施例来详细说明本发明的实施方式， 借此对本发明 如何应用技术手段来解决技术问题， 并达成技术效果的实现过程能充分理解 互结合， 均在本发明的保护范围之内。
如图 1 所示， 本发明实施例的推靠解卡短节主要包括第一解卡臂 1、 第 一三口换向阀 VI、 二口换向阀 V2以及第三三口换向阀 V4等等。
第一解卡臂 1的收回腔 Q11 (有杆腔）与可连通蓄能器的蓄能腔 NQ和 二口换向阀 V2的第一三口换向阀 VI相连。 二口换向阀 V2的另一端可通过 压力油线连通液压系统的压力油总线 G2。 第一解卡臂 1的伸出腔 Q12 (无杆 腔）与可连通液压系统的压力油总线 G2及回油总线 G1 的第三三口换向阀 V4相连。
如图 1 所示， 本发明实施例的推靠解卡短节中， 在蓄能器的蓄能腔 NQ 管线上设置有液压压力传感器 S1 , 该液压压力传感器 S1 实时监测蓄能器的 蓄能腔 NQ的压力。
本发明实施例的推靠解卡短节在应用时，可以安装在 EFDT探头短节（包 括 EFDT单探头短节或者双探头短节等等） 的上方或者下方。 在与 EFDT探 头短节安装时， 第一解卡臂 1的伸出方向与探头短节中探头的伸出方向及支 撑臂的伸出方向不相同。 一般地， 探头短节中探头的伸出方向与支撑臂的伸 出方向相反。 本发明实施例的推靠解卡短节在与 EFDT探头短节安装时， 第 一解卡臂 1的伸出方向较佳地， 与探头短节中探头的伸出方向或者支撑臂的 伸出方向垂直。 当然地， 第一解卡臂 1的伸出方向同时垂直于推靠解卡短节 的轴线方向。 如此， 在 EFDT探头短节粘附遇卡时， 即可控制将第一解卡臂 伸出， 对 EFDT仪器施加一个侧向推力， 将仪器解卡。
如图 1所示， 本发明实施例的推靠解卡短节在第一解卡臂 1需伸出解卡 时， 将第一三口换向阀 VI换向， 将第一解卡臂 1收回腔 Q11与液压系统的 回油总线 G1连通， 将第三三口换向阀 V4换向， 将第一解卡臂 1伸出腔 Q12 与液压系统的压力油总线 G2连通，利用压力油总线 G2中的高压液压油将第 一解卡臂 1推出， 直至接触井壁进行解卡或者达到第一解卡臂 1的最大伸出 距离。 在第一解卡臂 1接触井壁进行解卡时， 第一解卡臂 1与 EFDT探头短 节的推靠坐封形成一定角度（优选地形成直角） ， 对压差粘卡下的仪器施加 一个侧向推力， 能够将仪器解卡。
如图 2所示， 仪器解卡完成后收回第一解卡臂 1时， 将第三三口换向阀
V4换向， 将第一解卡臂 1的伸出腔 Q12和液压系统的回油总线 G1连通， 将 第一三口换向阀 VI换向， 将第一解卡臂 i的收回腔 Ql l和蓄能器的蓄能腔
NQ、 二口换向阀 V2出口路连通， 再将二口换向阀 V2换向， 连通至压力油 总线 G2, 从而收回第一解卡臂 1。
图 1及图 2中所示的总线 G3为样品总线。
如图 1所示， 本发明实施例的推靠解卡短节还可以包括第二解卡臂 2和 第二三口换向阀 V3。 一般地， 该第二解卡臂 2的伸出方向与第一解卡臂 1的 伸出方向不同 （实际上， 二者的伸出方向相同也是可行地） 。 较佳地， 如图 1所示， 该第二解卡臂 2的伸出方向与第一解卡臂 1的伸出方向相反。 第二 解卡臂 2的收回腔 Q21 (有杆腔）与可连通蓄能器的蓄能腔 NQ和二口换向 阀 V2的第一三口换向阀 VI相连。 第二解卡臂 2的伸出腔 Q22 (无杆腔）与 可连通液压系统的压力油总线 G2以及回油总线 G1的第二三口换向阀 V3相 连。 据此， 第一解卡臂 1与第二解卡臂 2的伸出与收回可以实现单独控制。
仪器不完全居中的情况下， 两个解卡臂中的一个在完全伸出后， 也有可 能接触不到井壁， 从而无法形成推靠反作用力， 起不到推靠解卡的作用。 在 这种情况下， 伸出另一侧的支撑臂， 从而通过该另一侧接触井壁形成推靠反 作用力， 保证解卡成功。
第二解卡臂 2的伸出与收回， 可参考前文第一解卡臂 1的伸出与收回， 此处不再赘述。
包含有两个解卡臂的本发明实施例的推靠解卡短节， 其连接到 EFDT上 (统一为挂接到 EFDT仪器上， 因为不仅仅与探头短节连接， 另一端还需与 其他短节连接） 为仪器解卡时， 可以先控制其中一个解卡臂伸出进行侧向推 靠解卡。 成功解卡后收回解卡臂， 并上提仪器。 在地层测试器偏心的情况下， 其中一个解卡臂达到最大伸出距离后仍未成功接触到井壁形成有效的侧向推 靠力， 则此时可以伸出另一个解卡臂， 从另一个方向进行推靠解卡， 提高解 卡成功率。
蓄能器的蓄能腔 NQ始终保持着压力，可通过监测液压压力传感器 S1获 取蓄能腔 NQ的压力值。 当解卡臂伸出后， 如发生控制系统掉电或其他紧急 井况，第一三口换向阀 VI可以自动连通蓄能器的蓄能腔 NQ和解卡臂收回腔， 将解卡臂自动收回， 保证了地层测试器在井下的作业安全。
本发明实施例的推靠解卡短节釆用模块式的设计， 通过机械、 液压以及 电气控制总线式设计， 能够与 EFDT仪器实现快速兼容和无缝连接。
本发明实施例的推靠解卡短节在应用时， 可以在 EFDT探头短节的上方 和下方各安装一个推靠解卡短节。
如图 3和图 4所示， 本发明实施例的地层测试器的推靠解卡装置主要包 括成对地安装在 EFDT探头短节 30上方的至少一个第一推靠解卡短节 31和 下方的至少一个第二推靠解卡短节 32。 本发明实施例以一个第一推靠解卡短 节 31和一个第二推靠解卡短节 32为例进行说明。 其中第一推靠解卡短节 31 与第二推靠解卡短节 32的结构及工作原理相同，请参考图 1及图 2所示的本 发明实施例的推靠解卡短节。
本发明实施例中， 两个推靠解卡短节均至少包含有一个解卡臂。 如图 3 及图 4的本发明实施例， 第一推靠解卡短节 31包含有第一解卡臂 41和第二 解卡臂 42, 两个解卡臂的伸出方向相反。 第二推靠解卡短节 32也包含有第 一解卡臂 41和第二解卡臂 42, 两个解卡臂的伸出方向相反， 且与第一推靠 解卡短节 31的两个解卡臂的伸出方向对应相同或平行。
一般地， 第一推靠解卡短节 31和第二推靠解卡短节 32各自的解卡臂， 方向 （实际上， 两个推靠解卡短节上的解卡臂的伸出方向与 EFDT探头短节 30探头的伸出方向或者支撑臂的伸出方向相同， 也是可行的） 。 较佳地， 第 一推靠解卡短节 31的两个解卡臂的伸出方向与 EFDT探头短节 30的探头 51 或者支撑臂 52的伸出方向垂直， 第二推靠解卡短节 32的两个解卡臂的伸出 方向也与 EFDT探头短节 30的探头 51或者支撑臂 52的伸出方向垂直。
在对 EFDT仪器 30进行解卡时， 其上方的第一推靠解卡短节 31和下方 的第二推靠解卡短节 32同时作用， 二者伸出各自同向的解卡臂。 在两个推靠 解卡短节均包含有至少两个解卡臂时，较佳地在 EFDT探头短节 30上方和下 方同时伸出各自的同向解卡臂。
本发明实施例可以先从一个方向进行推靠， 若未能解卡则可从另一个方 向再次进行推靠解卡， 提高解卡成功率。 本发明实施例在紧急情况下可以自 动收回处于伸出状态的解卡臂， 并且在不推靠时能够在收回方向液压锁紧， 不会导致自张开， 保证了地层测试器作业安全。
虽然本发明所揭露的实施方式如上， 但所述的内容仅为便于理解本发明 而釆用的实施方式， 并非用以限定本发明。 任何本发明所属领域内的技术人 员， 在不脱离本发明所揭露的精神和范围的前提下， 可以在实施的形式及细 节上进行任何的修改与变化， 但本发明的保护范围， 仍须以所附的权利要求 书所界定的范围为准。
工业实用性 本发明实施例通过地层测试仪推靠解卡装置可以有效地解决钻井中途油 气层测试仪泥浆粘附遇卡时的解卡问题，从而提高地层测试器测井的安全性, 降低地层测试器在井下的作业风险。

Claims

权 利 要 求 书
1、 一种地层测试器的推靠解卡短节， 包括：
第一解卡臂（1) , 其具有收回腔（Q11)及伸出腔（Q12) ； 二口换向阀 （V2) , 其可连通液压系统的压力油总线（G2) ； 第一三口换向阀（VI) , 其可连通蓄能器的蓄能腔（NQ)和所述二口换 向阀 （V2) ； 以及
第三三口换向阀 （V4) , 其可连通所述液压系统的压力油总线（G2)及 回油总线（G1 ) ； 其中：
所述第一解卡臂（1)的收回腔（Q11)与所述第一三口换向阀 （VI)相 连， 所述第一解卡臂（1)的伸出腔（Q12)与所述第三三口换向阀 （V4)相 连。
2、 根据权利要求 1所述的地层测试器的推靠解卡短节， 还包括： 第二解卡臂（2) , 其具有收回腔 （Q21)及伸出腔（Q22) ； 以及 第二三口换向阀 （V3) , 其可连通所述液压系统的压力油总线（G2)以 及回油总线（G1 ) ；
其中，所述第二解卡臂（ 2 )的收回腔（ Q21 )与所述第一三口换向阀 ( VI ) 相连， 所述第二解卡臂（2) 的伸出腔（Q22)与所述第二三口换向阀 （V3) 相连。
3、 根据权利要求 2所述的地层测试器的推靠解卡短节， 其中， 所述第二 解卡臂（2) 的伸出方向与所述第一解卡臂（1) 的伸出方向不同。
4、 根据权利要求 3所述的地层测试器的推靠解卡短节， 其中， 所述第二 解卡臂（2) 的伸出方向与所述第一解卡臂（1) 的伸出方向相反。
5、 根据权利要求 1所述的地层测试器的推靠解卡短节， 其中， 所述蓄能 器的蓄能腔（NQ) 的管线上设置有液压压力传感器（S1) 。
6、 一种地层测试器的推靠解卡装置， 包括至少一个如权利要求 1所述的 推靠解卡短节。
7、 根据权利要求 6所述的推靠解卡装置， 其中， 所述推靠解卡短节的第 一解卡臂（ 1 )的伸出方向与所述地层测试器的探头的伸出方向及支撑臂的伸 出方向不同。
8、 根据权利要求 7所述的推靠解卡装置， 其中， 所述推靠解卡短节的第 一解卡臂（ 1 )的伸出方向与所述地层测试器的探头的伸出方向或者支撑臂的 伸出方向垂直。
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