mwirth-epo/epo-nmt-datasets huggingface dataset:
海洋油气资源已成为能源供应的重要来源，高产量、高投入、高风险是海洋深水油气勘探开发作业的特征。
High output, high investment and high risk are the characteristics of exploration and development operations of marine deepwater oil and gas.
水下井口系统是深水钻井、完井、采油等作业的基础组成，水下井口内部安装多层套管头和环空密封装置，套管头用于悬挂套管，将套管柱重量施加在水下井口上，密封装置用于密封套管头和水下井口之间的环形空间，隔绝套管头上方与下方的套管外部环形空间。
A multilayer casing hanger and annulus sealing device are installed inside the subsea wellhead, where the casing hanger is used to suspend a casing, and apply the weight of the casing string to the subsea wellhead, and the sealing device is used to seal an annulus space between the casing hanger and the subsea wellhead to isolate an external annulus space of the casing above and below the casing hanger.
套管头、环空密封装置及其下入工具是一同下入水下井口处，如何安装套管头和密封装置是下套管、继续钻井的关键，合理的下入工具设计能减少施工步骤和安装难度，提高安装作业的可靠性。
A reasonable design of the running tool can reduce construction steps and installation difficulty, and improve the reliability of installation operation.
现有技术中，有一种海洋深水钻井用套管挂和密封下入工具，该工具在液压辅助下放活塞、安装套管环空密封装置时需要投掷阻塞镖等工具，并且需要在平台安装相应设备，增加了井口操作步骤。
In the prior art, there is existed a casing hanger and a sealing running tool for marine deepwater drilling, the tool needs to throw blocking darts and other instruments when lowering the piston and installing the casing annulus sealing device under the hydraulic assistance, and needs to install corresponding equipments on the derrick, increasing wellhead operation steps.
由此，本发明人凭借多年从事相关行业的经验与实践，提出一种深水钻井用套管头与环空密封装置下入工具及其使用方法，以克服现有技术的缺陷。
Therefore, based on years of experience and practice in related industries, the inventor proposes a casing hanger and annulus sealing device running tool for deepwater drilling and a method of using the same, to overcome the defects of the prior art.
本发明的目的在于提供一种深水钻井用套管头与环空密封装置下入工具及其使用方法，克服现有技术中存在的安装复杂、匹配设备多成本高等问题，该深水钻井用套管头与环空密封装置下入工具及其使用方法，能实现在海底的水下井口处安装套管头与环空密封装置的要求，具有安装施工步骤少、成本较低的优点。
The casing hanger and annulus sealing device running tool for deepwater drilling and the method for using thereof can achieve the requirements of installing a casing hanger and an annulus sealing device at a subsea wellhead on the seafloor, and have advantages of few installation and construction steps and low cost.
本发明的目的是这样实现的，一种深水钻井用套管头与环空密封装置下入工具，包括中空的芯轴，所述芯轴的外壁上部通过中空的传扭结构密封连接中空的悬挂结构，所述芯轴远离所述传扭结构的一端滑动穿设通过一活塞，所述活塞的外壁与所述悬挂结构的内壁下部密封连接，所述悬挂结构的内腔与所述传扭结构的内腔连通构成活塞腔，所述活塞远离所述传扭结构的一端位于所述活塞腔的外部，所述活塞腔和所述活塞构成液压活塞结构；所述传扭结构的内壁与所述芯轴的外壁之间设置连通阀结构，所述连通阀结构能连通所述活塞腔和所述芯轴的内腔；所述悬挂结构包括能随所述芯轴绕中心轴转动的悬挂筒，所述悬挂筒的外壁底部设置能旋转钩挂且能旋转解脱环空密封装置的弹性销钉，所述弹性销钉能沿径向伸缩；所述悬挂筒的内壁下部密封固定连接有旋转筒，所述旋转筒能随所述悬挂筒旋转，所述旋转筒的内壁通过螺纹连接于所述活塞的外壁上，所述活塞和所述旋转筒构成丝杠螺母结构；所述活塞远离所述传扭结构的一端套设有开口锁环，所述开口锁环能径向张开地钩挂套管头且能径向收缩地解脱所述套管头。
The object of the present invention is achieved as follows: a casing hanger and annulus sealing device running tool for deepwater drilling includes a hollow spindle, and an upper part of an outer wall of the spindle is hermetically connected to a hollow suspension structure via a hollow torque transmission structure, one end of the spindle away from the torque transmission structure slidably passes through a piston, an outer wall of the piston is connected to a lower part of an inner wall of the suspension structure in a sealed manner, an inner cavity of the suspension structure communicates with an inner cavity of the torque transmission structure to form a piston cavity, one end of the piston away from the torque transmission structure is located outside the piston cavity, the piston cavity and the piston form a hydraulic piston structure; a communication valve structure is provided between an inner wall of the torque transmission structure and the outer wall of the spindle, and the communication valve structure can communicate the piston cavity and an inner cavity of the spindle; the suspension structure includes a suspension cylinder capable of rotating with the spindle around a central axis, a bottom of an outer wall of the suspension cylinder is provided with an elastic pin capable of rotating to hook to and rotating to release an annulus sealing device, the elastic pin is capable of radially expansion and contraction; a lower part of an inner wall of the suspension cylinder is fixedly connected to a rotating cylinder in a sealed manner, the rotating cylinder can rotate with the suspension cylinder, an inner wall of the rotating cylinder is connected to the outer wall of the piston via a thread, and the piston and the rotating cylinder form a lead screw nut structure; one end of the piston away from the torque transmission structure is sleeved with an open type lock ring and the open type lock ring can open radically to hook to a casing hanger and contract radically to release the casing hanger.
在本发明的一较佳实施方式中，所述芯轴的底部套设有中空的下接头，所述下接头的外壁顶部能与所述活塞的内壁密封抵靠。
In a preferred embodiment of the present invention, a bottom of the spindle is sleeved with a hollow lower joint, and a top of an outer wall of the lower joint can seal against an inner wall of the piston.
在本发明的一较佳实施方式中，所述活塞内设有允许所述芯轴密封滑动穿过的芯轴过孔，所述芯轴过孔的下方设置有内径呈增大设置的第一扩径孔，所述活塞远离所述传扭结构的一端向内设置第二扩径孔，所述第一扩径孔通过内径自上而下呈渐扩设置的第一锥面与所述第二扩径孔连通，所述下接头的外壁顶部能与所述第一扩径孔的内壁密封滑动抵靠，所述下接头的外壁上设置有第一凸台部，所述第一凸台部的外壁能与所述第二扩径孔的内壁密封滑动抵靠，所述第一凸台部的顶部设置能与所述第一锥面顶抵密封的第二锥面。
The outer wall of the lower joint is provided with a first boss part, an outer wall of the first boss part slide against an inner wall of the second diameter-enlarged hole in a sealed manner.
在本发明的一较佳实施方式中，所述传扭结构包括密封套设于所述芯轴上的中空的连接盘体，所述连接盘体的内壁上部与所述芯轴的外壁之间设置所述连通阀结构，所述传扭结构还包括能沿所述芯轴轴向移动的中空的驱动筒，所述驱动筒的顶部能密封滑动穿设于所述连接盘体的内腔中，所述连通阀结构与所述活塞腔连通设置，所述悬挂筒的一端穿设于所述驱动筒的内腔中，所述连接盘体与所述悬挂筒通过传扭杆固定连接；所述连接盘体和所述驱动筒的外部套设有扶正结构。
The torque transmission structure further includes a hollow driving cylinder capable of moving axially along the spindle, a top of the driving cylinder can slide provided in an inner cavity of the connecting disc body in a sealed manner.
在本发明的一较佳实施方式中，所述扶正结构包括与所述驱动筒同轴设置的外筒，所述外筒的顶部与所述连接盘体固定连接，所述外筒的侧壁下部通过剪切销钉与所述驱动筒的侧壁下部连接。
In a preferred embodiment of the present invention, the centralizer structure includes an outer cylinder disposed coaxially with the driving cylinder; a top of the outer cylinder is fixedly connected to the connecting disc body.
在本发明的一较佳实施方式中，所述连接盘体和所述芯轴通过多个第一连接销钉连接，所述连接盘体的侧壁上部设置多个第一透孔，所述芯轴的侧壁上与各所述第一透孔对应的位置设置第一连接孔，各所述第一连接销钉穿设通过所述第一透孔后连接于所述第一连接孔内。
A side wall of the spindle is provided with first connection holes at positions corresponding to the first through-holes, and the first connection pins are connected to the inside of the first connection holes after passing through the first through-holes.
在本发明的一较佳实施方式中，所述连接盘体的外壁上套设有第一卡环，所述第一卡环的底面顶抵于所述传扭杆的顶面上。
In a preferred embodiment of the present invention, an outer wall of the connecting disc body is sleeved with a first snap ring, and a bottom surface of the first snap ring abuts against a top surface of the torque transmission bar.
在本发明的一较佳实施方式中，所述连通阀结构包括抵靠套设于所述芯轴的外壁和所述连接盘体的内壁之间的阀体，所述芯轴的外壁上设置第一台阶部，所述连接盘体的内壁上设置直径呈减小设置的第二台阶部，所述阀体的一端面顶抵于所述第一台阶部上，所述阀体的另一端面顶抵于所述第二台阶部上，所述阀体内设置上下贯通的阀芯孔，所述阀芯孔内滑动设置有阀芯，所述阀芯的一端套设阀芯弹簧，所述阀芯弹簧的一端顶抵于所述第一台阶部上，所述阀芯穿出所述阀体的另一端位于所述驱动筒的内腔中；所述阀芯孔内设置有直径自上而下渐缩的阀芯孔锥面，所述阀芯的外壁上设置有能与所述阀芯孔锥面匹配密封抵靠卡止的阀芯锥面，所述芯轴的侧壁上设置有第一连通透孔，所述阀芯孔的侧壁上设有与所述第一连通透孔连通设置的阀体连通孔，所述阀芯的一端向内设置有能连通所述阀芯孔与所述阀体连通孔的第一通道孔，所述阀芯的另一端向内设置有能连通所述活塞腔与所述阀体连通孔的第二通道孔，所述第一通道孔的底部开口位于所述阀芯锥面的上方，所述第二通道孔的顶部开口位于所述阀芯锥面的下方。
The outer wall of the spindle is provided with a first step part, the inner wall of the connecting disc body is provided with a second step part with a reduced diameter; one end surface of the valve body abuts against the first step part, and the other end surface of the valve body abuts against the second step part.
在本发明的一较佳实施方式中，所述旋转筒的侧壁上沿周向间隔穿设有多个能径向伸缩的弹性锁块，所述悬挂筒的内壁上设置有多个键槽，各所述弹性锁块能径向伸出且各所述弹性锁块的径向外侧能分别卡设于对应的键槽内，所述活塞的外壁上位于所述键槽上方的位置设置有活塞凹槽，各所述弹性锁块能径向收缩且各所述弹性锁块的径向内侧能滑设于所述活塞凹槽内。
In a preferred embodiment of the present invention, a plurality of elastic lock blocks capable of radially expansion and contraction are provided on a side wall of the rotating cylinder at intervals along a circumferential direction, and a plurality of key grooves are provided on the inner wall of the suspension cylinder.
在本发明的一较佳实施方式中，所述旋转筒位于所述悬挂筒外部的一端能转动套设于一锥套的外壁顶部，所述锥套的外径自上而下呈渐缩设置，所述旋转筒能推动所述锥套下移将所述开口锁环顶抵张开。
In a preferred embodiment of the present invention, one end of the rotating cylinder located outside the suspension cylinder can rotate to be sleeved on a top of an outer wall of a tapered sleeve, and the tapered sleeve has an outer diameter that is tapering from top to bottom.
在本发明的一较佳实施方式中，所述锥套上沿轴向设置有至少一个底部开口的锥套豁口透槽，所述活塞的外壁上固定设置有与所述锥套豁口透槽对应的防扭键，所述锥套豁口透槽滑动套设于所述防扭键的周向两侧。
In a preferred embodiment of the present invention, the tapered sleeve is provided with at least one tapered sleeve open type through slot with a bottom open, along an axial direction.
本发明的目的还可以这样实现，如前述的深水钻井用套管头与环空密封装置下入工具的使用方法，包括以下步骤，
A method for using the casing hanger and annulus sealing device running tool for deepwater drilling described above includes the following steps:
步骤a、深水钻井用套管头与环空密封装置下入工具和环空密封装置、套管头连接后，提起钻杆，移除井口卡瓦装置，下放钻杆，将深水钻井用套管头与环空密封装置下入工具、环空密封装置、套管头、套管送入水下井口处；
Step a: after the casing hanger and annulus sealing device running tool for deepwater drilling is connected with the annulus sealing device and the casing hanger, lift up the drill pipe, remove a slip, lower the drill pipe, to send the casing hanger and annulus sealing device running tool for deepwater drilling, the annulus sealing device, the casing hanger and the casing to a subsea wellhead;
步骤b、向钻杆内泵入水泥，开始水泥固井；
Step b: pump cement into the drill pipe to start cementing;
步骤c、下放钻杆，套管头卡放在水下井口的台阶面上，在平台上标记钻杆的周向位置和竖直位置；
Step c: lower the drill pipe, lock the casing hanger onto a step surface of the subsea wellhead, and mark a circumferential position and a vertical position of the drill pipe on a derrick;
步骤d、顺时针旋转钻杆，钻杆带动芯轴、阀体、连接盘体、传扭杆、驱动筒、悬挂筒及旋转筒旋转，旋转筒带动锥套向上移动，锥套的底部端面与开口锁环的顶部端面平行时，开口锁环径向收缩，深水钻井用套管头与环空密封装置下入工具和套管头解脱；
Step d: rotate the drill pipe clockwise, the drill pipe then drives the spindle, the valve body, the connecting disc body, the torque transmission bar, the driving cylinder, the suspension cylinder and the rotating cylinder to rotate, the rotating cylinder drives the tapered sleeve to move upward, and when a bottom end surface of the tapered sleeve is parallel to a top end surface of the open type lock ring, the open type lock ring is contracted radially, and thereby the casing hanger and annulus sealing device running tool for deepwater drilling is released from the casing hanger;
步骤e、继续顺时针旋转钻杆预定圈数，旋转筒旋转上升至各弹性锁块离开键槽，旋转筒上升至各弹性锁块到达活塞凹槽位置时，各弹性锁块径向收缩且其径向内侧一端滑设于活塞凹槽内，旋转筒与悬挂筒相脱离，旋转筒停止转动；
Step e: continue to rotate the drill pipe clockwise for a predetermined number of turns, to allow the rotating cylinder to rotate and rise until the elastic lock blocks leave the key grooves, and when the rotating cylinder rotates and rises until the elastic lock blocks reach positions where the piston grooves are located, the elastic lock blocks are contracted radially, and their radial inner ends slide into the piston grooves, then the rotating cylinder separates from the suspension cylinder, and the rotating cylinder stops rotating;
步骤f、下放钻杆，钻杆带动连接盘体、传扭杆、驱动筒、悬挂筒、环空密封装置下行，环空密封装置卡套于套管头的外壁上，活塞顶部的第二凸台部穿设进入驱动筒上通孔内，驱动筒与活塞形成活塞密封结构，形成液压辅助活塞；
Step f: lower the drill pipe, the drill pipe drives the connecting disc body, the torque transmission bar, the driving cylinder, the suspension cylinder, and the annulus sealing device to descend, the annulus sealing device is then sleeved on an outer wall of the casing hanger, and the second boss part on a top of the piston passes into the through-hole of the driving cylinder, the driving cylinder and the piston form a piston sealing structure, forming a hydraulic auxiliary piston;
步骤g、钻杆带动芯轴、连接盘体、传扭杆、驱动筒、悬挂筒继续下行，活塞腔的容积减小，活塞腔内压力升高，阀芯上行，第二通道孔通过阀体连通孔、第一连通透孔与芯轴的内腔连通，活塞腔与芯轴的内腔连通，活塞腔内的流体流入芯轴的内腔；钻杆继续下行，钻杆的竖直方向的位移达到预定设计的位移时，第二凸台部的顶部端面上顶阀芯，活塞腔通过第二通道孔、阀体连通孔、第一连通透孔与芯轴1的内腔连通；
Step g: drill pipe drives the spindle, the connecting disc body, the torque transmission bar, the driving cylinder, and the suspension cylinder to continue to descend, a volume of the piston cavity decreases, and a pressure in the piston cavity increases, the valve core moves upward, the second passage hole communicates with the inner cavity of the spindle through the valve body communication hole and the first communication through-hole, the piston cavity communicates with the inner cavity of the spindle, and the fluid in the piston cavity flows into the inner cavity of the spindle; the drill pipe continues to descend and when a displacement of the drill pipe in a vertical direction reaches a predetermined displacement, the top end surface of the second boss part pushes the valve core upward; the piston cavity communicates with the inner cavity of the spindle 1 via the second passage hole, the valve body communication hole and the first communication through-hole;
步骤h、在地面钻井平台处操作液压设备向钻杆内增压，高压流体通过第一连通透孔、阀体连通孔进入活塞腔，驱动筒在高压流体的推动下剪断剪切销钉继续下行；
Step h: operate a hydraulic equipment at a derrick to pressurize the interior of the drill pipe, a high-pressure fluid enters the piston cavity through the first communication through-hole and the valve body communication hole, and the driving cylinder shears off the shear pin and continues to descend under the drive of the high-pressure fluid;
步骤i、驱动筒的底部端面将液压力传递至环空密封装置上，环空密封装置密封水下井口与套管头之间的环形空间，实现环空密封装置的坐封；
Step i: a bottom end surface of the driving cylinder transmits the hydraulic pressure to the annulus sealing device, the annulus sealing device seals the annulus space between the subsea wellhead and the casing hanger to insulate the annular pressure;
步骤j、停止增压，对钻杆施加轴向上拉力，带动芯轴、连接盘体、传扭杆、悬挂筒上行，在轴向上提力的作用下，弹性销钉被剪断，深水钻井用套管头与环空密封装置下入工具和环空密封装置解脱；
Step j: stop pressurizing, apply an axial tension to the drill pipe, to drive the spindle, the connecting disc body, the torque transmission bar, and the suspension cylinder to move upward, and the elastic pins are cut off under the action of the axial tension, the casing hanger and annulus sealing device running tool for deepwater drilling is released from the annulus sealing device; and
步骤k、上提钻杆，将深水钻井用套管头与环空密封装置下入工具起出水下井口至地面平台，完成套管头和环空密封装置的安装。
Step k: pull the drill pipe upward, to raise the casing hanger and annulus sealing device running tool for deepwater drilling out of the subsea wellhead and to the derrick, completing installations of the casing hanger and the annulus sealing device.
由上所述，本发明提供的深水钻井用套管头与环空密封装置下入工具及其使用方法具有如下有益效果：
As described above, the casing hanger and annulus sealing device running tool for deepwater drilling provided by the present invention and the method for using the same include the following beneficial effects:
本发明的深水钻井用套管头与环空密封装置下入工具能实现在海底的水下井口处安装套管头与环空密封装置的要求，充分结合使用传扭结构、悬挂结构、液压活塞结构和丝杠螺母结构，悬挂筒能旋转钩挂且能旋转解脱环空密封装置，活塞底部能钩挂且能解脱套管头，液压活塞结构能对环空密封装置施加坐封力，通过旋转或推拉钻杆的方式实现环空密封装置、套管头的坐封或解脱；本发明的深水钻井用套管头与环空密封装置下入工具操作难度小，其使用方法的实施步骤简单，安装可靠性高，成本较低，利于推广使用。
the casing hanger and annulus sealing device running tool for deepwater drilling of the present invention can realize the requirements of installing the casing hanger and the annulus sealing device at the subsea wellhead on the seafloor, and fully use the torque transmission structure, the suspension structure, the hydraulic piston structure and the lead screw nut structure in combination, where the suspension cylinder can rotate to hook to and rotate to release the annulus sealing device, the bottom of the piston can hook to and release the casing hanger, the hydraulic piston structure can apply driving force to the annulus sealing device, and the sealing and releasing of the annulus sealing device and the casing hanger can be achieved by a method of rotating the drill pipe.
以下附图仅旨在于对本发明做示意性说明和解释，并不限定本发明的范围。
The casing hanger and annulus sealing device running tool for deepwater drilling of the present invention have less difficulty in operation, and the method for using the same has simple implementation steps, high installation reliability, and low cost, which is conducive to popularization and use.
图1：为本发明的深水钻井用套管头与环空密封装置下入工具的结构示意图。
FIG. 1 is a schematic structural diagram of a casing hanger and annulus sealing device running tool for deepwater drilling of the present invention.
图2：为图1中Ⅰ处放大图。
FIG. 2 is an enlarged diagram at I of FIG. 1.
图3：为本发明的阀体结构示意图。
FIG. 3 is a structural diagram of a valve body of the present invention.
图4：为本发明的阀芯结构示意图。
FIG. 4 is a schematic diagram of a valve core of the present invention.
图5：为使用本发明的深水钻井用套管头与环空密封装置下入工具下放施工最初状态示意图；
FIG. 5 is a schematic diagram of an initial state in which the casing hanger and annulus sealing device running tool for deepwater drilling of the present invention is lowered for construction.
图6：为使用本发明的深水钻井用套管头与环空密封装置下入工具下放施工时与套管头解脱状态示意图；
FIG. 6 is a schematic diagram of a release state in which the casing hanger and annulus sealing device running tool for deepwater drilling of the present invention is released from the casing hanger when being lowered for construction.
图7：为使用本发明的深水钻井用套管头与环空密封装置下入工具下放施工时坐封环空密封装置状态示意图。
FIG. 7 is a schematic diagram of a state in which the casing hanger and annulus sealing device running tool for deepwater drilling of the present invention seals the annulus sealing device when being lowered for construction.
100、深水钻井用套管头与环空密封装置下入工具；
In order to have a clearer understanding of the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.
1、芯轴；
As shown in FIGS. 1 to 7, the present invention provides a casing hanger and annulus sealing device running tool for deepwater drilling 100, which includes a hollow spindle 1, and a top of an inner wall of the spindle 1 is connected with a drill pipe 90 in a sealed manner, an upper part of an outer wall of the spindle 1 is connected to a hollow suspension structure 3 via a hollow torque transmission structure 2 in a sealed manner, one end of the spindle 1 away from the torque transmission structure 2 slidably passes through a piston 41, an outer wall of the piston 41 is connected with a lower part of an inner wall of the suspension structure 3 in a sealed manner, and an inner cavity of the suspension structure 3 communicates with an inner cavity of the torque transmission structure 2 to form a piston cavity 40, one end of the piston 41 away from the torque transmission structure 2 is located outside the piston cavity 40, and the piston cavity 40 and the piston 41 form a hydraulic piston structure 61; a communication valve structure 5 is provided between an inner wall of the torque transmission structure 2 and the outer wall of the spindle 1, the communication valve structure 5 can communicate the piston cavity 40 and the inner cavity of the spindle 1; the suspension structure 3 includes a suspension cylinder 31 capable of rotating with the spindle 1 around a central axis (central axis of the spindle 1), a bottom of an outer wall of the suspension cylinder 31 is provided with an elastic pin 32 capable of rotating to hook to and rotating to release an annulus sealing device 91 (prior art), the elastic pin can expand and contract in a radial direction (the radial direction refers to a diameter direction of the spindle 1), and there are a plurality of elastic pins 32.
11、下接头；
The casing hanger and annulus sealing device running tool for deepwater drilling of the present invention has less difficulty in operation, simple implementation steps, high installation reliability, and low cost, which is conducive to popularization and use.
111、第一凸台部；112、第二锥面；
Further, as shown in FIG. 1, the bottom of the spindle 1 is sleeved with a hollow lower joint 11.
12、第一台阶部；121、第一定位销；
To ensure the sealing effect, a seal ring is provided between an inner wall of the lower joint 11 and the outer wall of the spindle 1; a top of an outer wall of the lower joint 11 abuts against the inner wall of the piston 41 in a sealed manner.
13、第一连通透孔；
A bottom of the lower joint 11 can communicate with a cement injection tool 94 (prior art) in a sealed manner.
14、阀体卡环；
The spindle 1 and the lower joint 11 are hermetically communicated to form a connection structure of the casing hanger and annulus sealing device running tool for deepwater drilling 100, for realizing a connection of the casing hanger and annulus sealing device running tool for deepwater drilling 100 with the drill pipe.
2、传扭结构；
The spindle 1 and the lower joint 11 are connected in a detachable manner, which allows the casing hanger and annulus sealing device running tool for deepwater drilling 100 to be simply and conveniently removed and installed.
21、连接盘体；
The spindle 1 and the lower joint 11 are connected to form the connection structure of the casing hanger and annulus sealing device running tool for deepwater drilling 100, which may be used to transmit a torque and an axial force, suspend other components, and bear the gravity of the casing string (prior art, the casing hanger is installed on the top of the casing string) during installation.
211、第一卡环；212、第二台阶部；
Further, as shown in FIG. 1, the piston 41 is provided with a spindle through-hole 410 inside thereof, which allows the spindle 1 to slide through in a sealed manner.
22、驱动筒；
To ensure the sealing effect, a seal ring is provided between the spindle through-hole 410 and the outer wall of the spindle 1, the sealing ring can ensure the sealing of the piston cavity 40, prevent high-pressure fluid from leaking, and thus ensure the hydraulic pressure.
221、第三凸台部；
A first diameter-enlarged hole 411 with an increased inner diameter is provided below the spindle through-hole 410, and a second diameter-enlarged hole 412 is provided inward at one end of the piston 41 away from the torque transmission structure 2.
23、传扭杆；
The first diameter-enlarged hole 411 communicates with the second diameter-enlarged hole 412 via a first tapered surface 413 with an inner diameter gradually expanding from top to bottom.
24、外筒；
The top of the outer wall of the lower joint 11 can slidably abut against the inner wall of the first diameter-enlarged hole 411 in a sealed manner, and the outer wall of the lower joint 11 is provided with a first boss part 111.
25、剪切销钉；
An outer wall of the first boss part 111 can slidably abut against the inner wall of the second diameter-enlarged hole 412 in a sealed manner.
26、第一连接销钉；
The top of the first boss part 111 is provided with a second tapered surface 112 that is capable of abutting against the first tapered surface 413 in a sealed manner.
3、悬挂结构；
The lower joint 11 can move up and down under a push-pull action of the spindle 1 above it.
31、悬挂筒；
The outer wall of the first boss part 111 hermetically slides along the inner wall of the second diameter-enlarged hole 412 inside the piston 41.
32、弹性销钉；
The bottom of the outer wall of the piston 41 is provided a piston boss part 415 with an enlarged diameter, and the bottom end surface of the open type lock ring 42 axially abuts against the top surface of the piston boss part 415.
33、旋转筒；
The inner wall of the casing hanger 92 is provided with a casing hanger inner tapered surface (prior art) with a diameter tapering downward.
331、弹性锁块；
The bottom of the outer wall of the piston 41 is provided with a piston outer tapered surface matching with the casing hanger inner tapered surface.
34、锥套；
The piston outer tapered surface can be hermetically locked on the casing hanger inner tapered surface.
341、防扭键；342、防转螺钉；
Further, as shown in FIG. 1, the torque transmission structure 2 includes a hollow connecting disc body 21 that is hermetically sleeved on the spindle 1, and a communication valve structure 5 is provided between the upper part of the inner wall of the connecting disc body 21 and the outer wall of the spindle 1.
40、活塞腔；
The torque transmission structure also includes a hollow driving cylinder 22 capable of moving axially along the spindle 1.
1.一种重组T细胞受体(TCR)，其包含抗原结合链，所述抗原结合链包含细胞外抗原结合结构域和恒定结构域，其中所述重组TCR以HLA-非依赖性方式结合抗原，其中所述恒定结构域包含天然或修饰的TRAC肽和/或天然或修饰的TRBC肽。
A recombinant T cell receptor (TCR) comprising an antigen binding chain that comprises an extracellular antigen-binding domain and a constant domain, wherein the recombinant TCR binds to an antigen in an HLA-independent manner, wherein the constant domain comprises a native or modified TRAC peptide and/or a native or modified TRBC peptide.