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WO2018076282A1 - 一种机液一体丢手器 - Google Patents

一种机液一体丢手器 Download PDF

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Publication number
WO2018076282A1
WO2018076282A1 PCT/CN2016/103780 CN2016103780W WO2018076282A1 WO 2018076282 A1 WO2018076282 A1 WO 2018076282A1 CN 2016103780 W CN2016103780 W CN 2016103780W WO 2018076282 A1 WO2018076282 A1 WO 2018076282A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
release sleeve
upper joint
pawl
machine
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2016/103780
Other languages
English (en)
French (fr)
Inventor
邹伟
张梦华
刘练
王博伟
樊凌云
谢进
周生福
李文霞
杨坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Original Assignee
China Petroleum and Chemical Corp
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 China Petroleum and Chemical Corp filed Critical China Petroleum and Chemical Corp
Priority to PCT/CN2016/103780 priority Critical patent/WO2018076282A1/zh
Priority to US16/345,500 priority patent/US11035180B2/en
Publication of WO2018076282A1 publication Critical patent/WO2018076282A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/06—Releasing-joints, e.g. safety joints
    • 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
    • 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
    • E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E21B23/0412—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion characterised by pressure chambers, e.g. vacuum chambers

Definitions

  • the invention relates to the field of oil field oil production technology, in particular to a machine-liquid integrated hand-cranking device, and more particularly to a safety hand-disconnecting joint used in an oil and gas well completion pipe string.
  • the function of the safe drop joint used in the completion string of the oil and gas well is to use the safe drop joint to lift the upper column at the safe hand-off position when the lower completion string cannot be raised. Small losses and bring convenience to later work.
  • the technical problem to be solved by the invention is to provide a machine-liquid integrated hand-handling device, which effectively combines the mechanical hand-lost and the hydraulic hand-lost, and solves the problem that the mechanical lost hand has poor tensile strength and the hydraulic hand-lost in the prior art.
  • the present invention provides a machine-liquid integrated hand thrower comprising an upper joint, a lower joint and a pawl, the upper joint and the lower joint being respectively connected to both ends of the pawl; the spine
  • the outer side of the claw is sleeved with a release sleeve movable along the axial direction thereof, and the outer wall of the ratchet of the pawl is provided with a step, and the inner wall of the release sleeve is provided with a groove matching the step.
  • the step cooperates with the groove to limit the pawl; the upper end of the release sleeve is disposed between the release sleeve and the upper joint, and one end of the upper end of the release sleeve is inserted into the release sleeve The other end is sleeved on the outside of the upper joint and connected to the upper joint through a starting pin; a pressure chamber is formed between the upper joint and the upper end of the release sleeve, and a hydraulic chamber is arranged inside the upper joint. Two pressure transmitting holes communicating with the pressure chamber are radially symmetrically disposed on the side wall of the hydraulic chamber.
  • the outer wall of the upper joint is bounded by the pressure transmitting hole, and the outer diameter of the upper joint away from the end of the release sleeve is larger than the other end; the outer wall of the pressure transmitting hole and the release sleeve
  • the inner wall of the upper end constitutes a pressure chamber, and the two ends of the pressure chamber are respectively provided with a first sealing structure.
  • a guard ring is disposed between the pawl and the upper end of the release sleeve, the guard ring is sleeved on the upper joint, and the guard ring is connected to the release sleeve by a thread.
  • the upper joint is provided with a lock ring for limiting the upper end of the release sleeve.
  • the inner wall of the connection between the upper end of the release sleeve and the retaining ring is provided with a locking groove.
  • the locking groove and the locking ring cooperate with the upper end of the release sleeve. Axial limit.
  • ratchet teeth of the aforementioned pawl and the upper joint are connected by a tooth engagement, and the tooth bearing angle is 35°.
  • an end of the upper joint adjacent to the lower joint is connected to the handle by a throwing pin, and the lower joint is fixedly connected to the handle.
  • a second sealing structure is disposed between the end of the upper joint adjacent to the lower joint and the thorn.
  • the end of the upper joint is sleeved with an upper end centralizer, and the upper joint and the upper centralizer are connected by a thread.
  • the end of the lower joint is sleeved with a lower centralizer, and the lower joint and the lower centralizer are connected by a thread.
  • the invention provides a machine-liquid integrated hand-lost device, wherein the outer side of the pawl is sleeved with a release sleeve movable along the axial direction thereof, and the step on the outer wall of the ratchet tooth of the pawl cooperates with the groove on the inner wall of the release sleeve to cooperate with the spine
  • the claws are restrained to ensure that the pawl cannot be opened under the action of the pulling force, thereby enhancing the tensile resistance of the hand lost device, so that the upper connector and the lower connector are connected by the pawl during the completion of the completion of the tubular string, and an accident is encountered. The jam does not cause accidental loss of hands.
  • the invention provides a machine-liquid integrated hand-lost device, wherein an upper end of the release sleeve is arranged between the release sleeve and the upper joint, one end of the upper end of the release sleeve is inserted into the release sleeve, and the other end is sleeved outside the upper joint, and the start pin is passed
  • the upper joint is connected with the upper joint; a pressure chamber is formed between the upper joint and the upper end of the release sleeve, and a hydraulic chamber is disposed inside the upper joint, and two pressure transmitting holes communicating with the pressure chamber are symmetrically disposed on the side wall of the hydraulic chamber.
  • the pressure difference so the hand thrower can use the piston force generated by the pressure difference to cut the starting pin, so that the release sleeve moves in the direction of the downward joint, thereby causing the release of the pawl to fail, and the safely losing the joint and the lower joint are completely connected by the pin;
  • the pin is cut to separate the upper and lower joints, and the upper pipe string can be smoothly raised.
  • FIG. 1 is a schematic view showing the specific structure of the machine-liquid integrated hand thrower of the present invention.
  • 1 upper joint; 2: upper end centralizer; 3: release sleeve upper end; 4: guard ring; 5: lock ring; 6: release sleeve; 7: lower end centralizer; 8: lower joint; 9: start pin; 10: throwing pin; 11: sealing support ring; 12: pawl; 13: pressure transmission hole; 14: thrust screw; 15: O-ring.
  • the machine-liquid integrated hand thrower provided by the embodiment includes an upper joint 1 , a lower joint 8 and a pawl 12 , and the upper joint 1 and the lower joint 8 are respectively connected to two ends of the pawl 12 .
  • the outer side of the pawl 12 is sleeved with a release sleeve 6 movable along the axial direction thereof.
  • the outer wall of the ratchet 12 is provided with a step.
  • the inner wall of the release sleeve 6 is provided with a groove matching the step, and the step and the groove are matched with each other.
  • the pawl 12 is restrained, that is, the step is completely in contact with the reduced diameter portion on the inner wall of the release sleeve 6, so that the pawl 12 cannot be opened under the pulling force, which improves the tensile strength of the hand thrower and enhances the loss.
  • the reliability of the hand-handling device causes the hand-lost device to fail to accidentally lose hands in the event of an accidental jamming during the completion of the completion of the pipe string.
  • a release sleeve upper end 3 is disposed between the release sleeve 6 and the upper joint 1, and one end of the release sleeve upper end 3 is inserted into the release sleeve 6, and the other end is sleeved outside the upper joint 1, and is connected to the upper joint 1 through the start pin 9.
  • a pressure chamber is formed between the upper joint 1 and the upper end 3 of the release sleeve.
  • the outer wall of the upper joint 1 is bounded by the pressure transmission hole 13 such that the outer diameter of the end of the upper joint 1 away from the release sleeve 6 is larger than that of the upper joint 1
  • the outer diameter of one end of the sleeve 6 is released and formed into a stepped shape, so that the recessed area formed by the outer wall on both sides of the pressure transmitting hole 13 and the recessed area of the inner wall of the upper end of the release sleeve 3 constitute a pressure chamber, and the two ends of the pressure chamber are respectively provided
  • the first sealing structure is composed of a seal support ring 11 and an O-ring 15 and is combined and sealed.
  • the upper joint 1 is internally provided with a hydraulic chamber, and the side walls of the hydraulic chamber are symmetrically arranged on the side wall.
  • the pressure transmitting hole 13 communicating with the pressure chamber communicates the pressure between the hydraulic chamber and the pressure chamber, so that the pressure generated by the hydraulic chamber when the hand thrower is pressed enters the hydraulic chamber through the pressure transmitting hole 13.
  • a retaining ring 4 is disposed between the pawl 12 and the upper end 3 of the release sleeve.
  • the retaining ring 4 is sleeved on the upper joint 1, and the retaining ring 4 is connected to the release sleeve 6 through the threaded fastener to protect the pawl 12 from being prevented. Damage to the pawl 12 due to excessive movement of the upper end 3 of the release sleeve.
  • the upper joint 1 is provided with a lock ring 5 for limiting the upper end 3 of the release sleeve.
  • the inner wall of the joint of the upper end of the release sleeve 3 and the retaining ring 4 is provided with a lock groove.
  • the lock groove and the lock ring 5 cooperate with the upper end of the release sleeve 3
  • the axial limit that is, when the lock groove follows the release sleeve upper end 3 and the guard ring 4 to the position of the lock ring 5, the lock ring 5 is bounced into the slot, and the release sleeve upper end 3 and the upper joint 1 are locked, up and down None of them can continue to move.
  • the ratchets of the pawl 12 are connected to the upper joint 1 by a toothed engagement with a tooth bearing angle of 35°.
  • the starting pin 9 is cut, the release sleeve 6 is descended, the pawl 12 is disabled, the ratchet of the pawl 12 is opened, and the upper joint 1 is only passed through its end close to the lower joint 8.
  • the throwing pin 10 provided on the top is connected to the trickle. At this time, once the tension applied to both ends of the upper joint 1 and the lower joint 8 reaches the shear value of the throwing pin 10, the throwing pin 10 is sheared, thereby disengaging the upper joint 1 and the lower joint 8.
  • the lower joint 8 is fixedly connected to the thorn, so that the pawl 12 is always connected to the lower joint 8, and an O-ring 15 for sealing is provided between the lower joint 8 and the pawl 12.
  • a second sealing structure is disposed between the end of the upper joint 1 adjacent to the lower joint 8 and the thorn.
  • the second sealing structure is composed of a sealing support ring 11 and an O-ring 15 and is combined and sealed.
  • the upper end of the upper joint 1 is sleeved with an upper centralizer 2, and the upper joint 1 and the upper centralizer 2 are connected by a thread.
  • the lower end of the lower joint 8 is sleeved with a lower centralizer 7, and the lower joint 8 is connected to the lower centralizer 7 by a thread.
  • the upper centralizer 2 and the lower centralizer 7 act as a righting aid to the entire hand lost device.
  • a retaining screw 14 is further disposed between the upper centralizer 2 and the upper joint 1 and between the lower centralizer 7 and the lower joint 8.
  • the starting pin 9 and the lost pin 10 can also be flexibly set according to actual well conditions.
  • the buckles on both ends of the upper joint 1 and the lower joint 8 are 2-7/8EUE, and can be processed into other buckle types as needed.
  • the inner diameter of the hydraulic chamber is 62mm, and the inside is smooth, without steps and diameter reduction.
  • the working principle of the embodiment is that the upper joint 1 and the lower joint 8 are connected by the pawl 12 when entering the well, and the lost pin 10 is not subjected to force; after the completion of the tubular string is in place, due to the seated packer or the acid pressure construction There is a pressure difference inside and outside the oil pipe, so pressure is generated inside the hand thrower, and the pressure enters the pressure chamber through the pressure transmitting hole 13. Since the inner upper end surface of the release sleeve 3 has a smaller piston area than the lower end surface, the upper end 3 of the release sleeve is subjected to the downward force. .
  • the starting pin 9 When the resultant force reaches the shear value of the starting pin 9, the starting pin 9 is cut, and the retaining ring 4 and the release sleeve 6 which are integrally connected with the release sleeve 6 by the threaded sleeve are descended together.
  • the inner diameter of the upper end of the release sleeve 6 is large, and it is impossible to continue to cover the step of the pawl 12 after descending, causing the pawl 12 to bounce and the connection with the upper joint 1 to fail.
  • the lock groove descends to the position of the lock ring 5, the lock ring 5 is bounced into the lock groove, and the upper end of the release sleeve 3 and the upper joint 1 are locked, and the upper and lower sides cannot continue to move.
  • the upper joint 1 and the lower joint 8 are completely connected by the throwing pin 10 in the case where the pawl 12 fails. If the tension received by the upper and lower joints 8 reaches the shear value of the throwing pin 10, the pin is cut, and the upper joint 1 Disengaged from the lower joint 8 to complete the hand movement.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

一种机液一体丢手器，包括上接头（1）、下接头（8）和棘爪（12），上接头（1）和下接头（8）分别连接于棘爪（12）的两端；棘爪（12）的外侧套设可沿其轴向移动的释放套（6），棘爪（12）的棘齿外壁上设有台阶，释放套（6）的内壁设有与台阶配合的凹槽，台阶与凹槽配合对棘爪（12）进行限位；释放套（6）与上接头（1）之间设有释放套上端（3），释放套上端（3）的一端插设于释放套（6）内，另一端套设于上接头（1）外部，并通过启动销钉（9）与上接头（1）连接；上接头（1）与释放套上端（3）之间形成压力腔，上接头（1）内部设有液压腔，液压腔的侧壁上径向对称设置两个与压力腔连通的传压孔（13）。所提供的机液一体丢手器解决了现有技术中机械丢手抗拉能力较差、以及液压丢手可靠性不高的问题。

Description

一种机液一体丢手器 技术领域
本发明涉及油田采油技术领域，尤其涉及一种机液一体丢手器，更具体地涉及一种在油气井完井管柱中使用的安全丢手接头。
背景技术
在油气井完井管柱中使用的安全丢手接头的作用是，在下部完井管柱遇卡无法提出的时候，可以在安全丢手位置使用安全丢手接头起出上部管柱，从而减小损失，并给后期作业带来方便。
目前，完井期间使用的安全丢手接头主要有两类：一类是机械丢手，这类安全丢手具有操作方便、可靠性高、工具通径大等优点，但是其抗拉能力较差，导致在下完井管柱过程中一旦遇阻遇卡时，容易因操作不当而提前丢手。另一类是液压丢手，这类安全丢手的抗拉能力较强，因此在下完井管柱时不易出现意外，但是丢手时需要进行投球打压的操作，该操作复杂且可靠性不高，同时液压丢手内部一般存在缩径，容易给后期施工带来不便。
发明内容
(一)要解决的技术问题
本发明要解决的技术问题是提供了一种机液一体丢手器，将机械丢手和液压丢手有效结合为一体，解决现有技术中机械丢手抗拉能力较差、以及液压丢手可靠性不高的问题。
(二)技术方案
为了解决上述技术问题，本发明提供了一种机液一体丢手器，包括上接头、下接头和棘爪，所述上接头和下接头分别连接于所述棘爪的两端；所述棘爪的外侧套设可沿其轴向移动的释放套，所述棘爪的棘齿外壁上设有台阶，所述释放套的内壁设有与所述台阶配合的凹槽， 所述台阶与所述凹槽配合对所述棘爪进行限位；所述释放套与所述上接头之间设有释放套上端，所述释放套上端的一端插设于所述释放套内，另一端套设于所述上接头外部，并通过启动销钉与所述上接头连接；所述上接头与所述释放套上端之间形成压力腔，所述上接头内部设有液压腔，所述液压腔的侧壁上径向对称设置两个与所述压力腔连通的传压孔。
进一步的，前述上接头的外壁以所述传压孔为界，使所述上接头远离所述释放套的一端的外径大于另一端；所述传压孔两侧的外壁与所述释放套上端的内壁构成压力腔，并且所述压力腔的两端分别设有第一密封结构。
进一步的，前述棘爪与释放套上端之间设有护环，所述护环套设于所述上接头上，且所述护环通过丝扣与所述释放套连接。
进一步的，前述上接头上设有用于对所述释放套上端进行限位的锁环。
进一步的，前述释放套上端和护环的连接处的内壁上设有锁槽，当所述锁槽的位置与所述锁环对应时，所述锁槽和锁环配合对所述释放套上端轴向限位。
进一步的，前述棘爪的棘齿与所述上接头通过齿配合连接，齿承载角为35°。
进一步的，前述上接头靠近所述下接头的一端通过丢手销钉与所述棘手连接，所述下接头与所述棘手固定连接。
进一步的，前述上接头靠近所述下接头的一端与所述棘手之间设有第二密封结构。
进一步的，前述上接头的端部套设有上端扶正器，所述上接头与上端扶正器通过丝扣连接。
进一步的，前述下接头的端部套设有下端扶正器，所述下接头与下端扶正器通过丝扣连接。
(三)有益效果
本发明的上述技术方案具有以下有益效果：
本发明提供一种机液一体丢手器，棘爪的外侧套设可沿其轴向移动的释放套，棘爪的棘齿外壁上的台阶与释放套的内壁上的凹槽配合可对棘爪进行限位，保证在拉力作用下棘爪不能张开，从而增强丢手器的抗拉能力，使丢手器在下完井管柱期间，上接头和下接头依靠棘爪连接，遇到意外卡阻不会出现意外丢手的情况。
本发明提供一种机液一体丢手器，释放套与上接头之间设有释放套上端，释放套上端的一端插设于释放套内，另一端套设于上接头外部，并通过启动销钉与上接头连接；上接头与释放套上端之间形成压力腔，上接头内部设有液压腔，液压腔的侧壁上径向对称设置两个与压力腔连通的传压孔。使丢手器在下完井管柱期间上接头和下接头仅依靠棘爪连接，丢手销钉不受力；完井管柱下到位后，由于坐封封隔器或酸压施工时油管内外存在压差，因此丢手器可利用这个压差产生的活塞力剪断启动销钉，使释放套向下接头方向移动，从而导致棘爪释放失效，安全丢手上接头和下接头完全依靠销钉连接；当上修起管柱时一旦下部管柱遇卡，并且过提吨位达到设定的丢手销钉剪切值时，销钉被剪断，使上下接头分离，上部管柱就可以顺利提出。
附图说明
图1为本发明机液一体丢手器的具体结构示意图。
其中，1：上接头；2：上端扶正器；3：释放套上端；4：护环；5：锁环；6：释放套；7：下端扶正器；8：下接头；9：启动销钉；10：丢手销钉；11：密封支撑环；12：棘爪；13：传压孔；14：止退螺钉；15：O型密封圈。
具体实施方式
下面结合附图和实施例对本发明的实施方式作进一步详细描述。以下实施例用于说明本发明，但不能用来限制本发明的范围。
在本发明的描述中，需要说明的是，除非另有说明，“多个”的含义是两个或两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”、“前端”、“后端”、“头部”、“尾部”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
如图1所示，本实施例提供的一种机液一体丢手器，包括上接头1、下接头8和棘爪12，上接头1和下接头8分别连接于棘爪12的两端。棘爪12的外侧套设可沿其轴向移动的释放套6，棘爪12的棘齿外壁上设有台阶，释放套6的内壁设有与台阶配合的凹槽，台阶与凹槽配合对棘爪12进行限位，即该台阶与释放套6内壁上的缩径部分完全接触，这样在拉力作用下棘爪12便无法张开，提高了丢手器的抗拉能力，并且增强了丢手器的可靠性，使丢手器在下完井管柱期间，一旦遇到意外卡阻，也不会出现意外丢手的情况。
释放套6与上接头1之间设有释放套上端3，释放套上端3的一端插设于释放套6内，另一端套设于上接头1外部，并通过启动销钉9与上接头1连接；上接头1与释放套上端3之间形成压力腔，具体地说，上接头1的外壁以传压孔13为界，使上接头1远离释放套6的一端的外径大于上接头1靠近释放套6的一端的外径，并形成阶梯状，从而使传压孔13两侧的外壁形成的凹陷区域与释放套上端3的内壁的凹陷区域构成压力腔，并且压力腔的两端分别设有第一密封结构，其中，压力腔两端的第一密封结构分别设置于上接头1远离释放套6的一端、上接头1靠近释放套6的一端与释放套上端3之间，本实施例中，第一密封结构由密封支撑环11和O型密封圈15构成，并进行组合密封。
上接头1内部设有液压腔，液压腔的侧壁上径向对称设置两个与 压力腔连通的传压孔13，使液压腔与压力腔之间的压力相通，从而使丢手器在打压时液压腔产生的压力通过传压孔13进入液压腔。
棘爪12与释放套上端3之间设有护环4，护环4套设于上接头1上，且护环4通过丝扣与释放套6连接，对棘爪12起到保护作用，防止因释放套上端3移动过度造成棘爪12的损坏。
上接头1上设有用于对释放套上端3进行限位的锁环5。如图1中所示，释放套上端3和护环4的连接处的内壁上设有锁槽，当锁槽的位置与锁环5对应时，锁槽和锁环5配合对释放套上端3轴向限位，即当锁槽跟随释放套上端3和护环4一同下行到锁环5的位置时，锁环5弹开进入槽内，释放套上端3和上接头1被锁死，上下均无法继续移动。
棘爪12的棘齿与上接头1通过齿配合连接，齿承载角为35°。当丢手器的内压大于外压一定值时，启动销钉9剪断，释放套6下行，棘爪12失效，棘爪12的棘齿张开，上接头1仅通过其靠近下接头8的一端上设置的丢手销钉10与棘手连接。此时，一旦上接头1和下接头8两端受到的拉力达到丢手销钉10剪切值，丢手销钉10便会被剪断，从而使上接头1和下接头8脱开。另外，下接头8与棘手固定连接，使棘爪12始终与下接头8连接，下接头8与棘爪12之间还设有用于密封的O型密封圈15。
上接头1靠近下接头8的一端与棘手之间设有第二密封结构，本实施例中，第二密封结构由密封支撑环11和O型密封圈15构成，并进行组合密封。
上接头1的端部套设有上端扶正器2，上接头1与上端扶正器2通过丝扣连接。下接头8的端部套设有下端扶正器7，下接头8与下端扶正器7通过丝扣连接。上端扶正器2和下端扶正器7对整个丢手器起扶正作用。其中，上端扶正器2与上接头1之间、下端扶正器7与下接头8之间还设有止退螺钉14。
使用时，启动销钉9和丢手销钉10还可以根据实际井况灵活设置， 上接头1和下接头8两端的扣型为2-7/8EUE，也可根据需要加工为其它扣型。液压腔的内径为62mm，且内部光滑，不设置台阶和缩径。
本实施例的工作原理为：入井时上接头1和下接头8依靠棘爪12连接，丢手销钉10不受力；完井管柱下到位后，由于坐封封隔器或酸压施工时油管内外存在压差，因此丢手器内部产生压力，该压力通过传压孔13进入压力腔，由于释放套上端3内部上端面活塞面积小于下端面，因此使释放套上端3受到向下的合力。当合力达到启动销钉9的剪切值时，启动销钉9被剪断，与释放套6通过丝扣连接为一体的护环4和释放套6一同下行。释放套6的上端内径大，下行后无法继续套住棘爪12的台阶，导致棘爪12弹开，与上接头1的连接失效。当锁槽下行到锁环5的位置时，锁环5弹开进入锁槽内，释放套上端3和上接头1被锁死，上下均无法继续移动。在上接头1和下接头8在棘爪12失效的情况下完全依靠丢手销钉10连接，如果上下接头8收到的拉力达到丢手销钉10的剪切值时，销钉被剪断，上接头1和下接头8脱开，完成丢手动作。
本发明的实施例是为了示例和描述起见而给出的，而并不是无遗漏的或者将本发明限于所公开的形式。很多修改和变化对于本领域的普通技术人员而言是显而易见的。选择和描述实施例是为了更好说明本发明的原理和实际应用，并且使本领域的普通技术人员能够理解本发明从而设计适于特定用途的带有各种修改的各种实施例。

Claims (10)

  1. 一种机液一体丢手器，其特征在于，包括上接头、下接头和棘爪，所述上接头和下接头分别连接于所述棘爪的两端；所述棘爪的外侧套设可沿其轴向移动的释放套，所述棘爪的棘齿外壁上设有台阶，所述释放套的内壁设有与所述台阶配合的凹槽，所述台阶与所述凹槽配合对所述棘爪进行限位；所述释放套与所述上接头之间设有释放套上端，所述释放套上端的一端插设于所述释放套内，另一端套设于所述上接头外部，并通过启动销钉与所述上接头连接；所述上接头与所述释放套上端之间形成压力腔，所述上接头内部设有液压腔，所述液压腔的侧壁上径向对称设置两个与所述压力腔连通的传压孔。
  2. 根据权利要求1所述的机液一体丢手器，其特征在于，所述上接头的外壁以所述传压孔为界，使所述上接头远离所述释放套的一端的外径大于另一端；所述传压孔两侧的外壁与所述释放套上端的内壁构成压力腔，并且所述压力腔的两端分别设有第一密封结构。
  3. 根据权利要求2所述的机液一体丢手器，其特征在于，所述棘爪与释放套上端之间设有护环，所述护环套设于所述上接头上，且所述护环通过丝扣与所述释放套连接。
  4. 根据权利要求3所述的机液一体丢手器，其特征在于，所述上接头上设有用于对所述释放套上端进行限位的锁环。
  5. 根据权利要求4所述的机液一体丢手器，其特征在于，所述释放套上端和护环的连接处的内壁上设有锁槽，当所述锁槽的位置与所述锁环对应时，所述锁槽和锁环配合对所述释放套上端轴向限位。
  6. 根据权利要求1所述的机液一体丢手器，其特征在于，所述棘爪的棘齿与所述上接头通过齿配合连接，齿承载角为35°。
  7. 根据权利要求6所述的机液一体丢手器，其特征在于，所述上接头靠近所述下接头的一端通过丢手销钉与所述棘手连接，所述下接头与所述棘手固定连接。
  8. 根据权利要求7所述的机液一体丢手器，其特征在于，所述上接头靠近所述下接头的一端与所述棘手之间设有第二密封结构。
  9. 根据权利要求1所述的机液一体丢手器，其特征在于，所述上接头的端部套设有上端扶正器，所述上接头与上端扶正器通过丝扣连接。
  10. 根据权利要求1所述的机液一体丢手器，其特征在于，所述下接头的端部套设有下端扶正器，所述下接头与下端扶正器通过丝扣连接。
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