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WO2013155734A1 - 一种连续油管夹持机构及采用该夹持机构的注入头 - Google Patents

一种连续油管夹持机构及采用该夹持机构的注入头 Download PDF

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Publication number
WO2013155734A1
WO2013155734A1 PCT/CN2012/074908 CN2012074908W WO2013155734A1 WO 2013155734 A1 WO2013155734 A1 WO 2013155734A1 CN 2012074908 W CN2012074908 W CN 2012074908W WO 2013155734 A1 WO2013155734 A1 WO 2013155734A1
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WO
WIPO (PCT)
Prior art keywords
clamping block
saddle
clamping mechanism
coiled tubing
clamping
Prior art date
Application number
PCT/CN2012/074908
Other languages
English (en)
French (fr)
Inventor
刘�东
于清峰
方基垒
Original Assignee
烟台杰瑞石油服务集团股份有限公司
烟台杰瑞石油装备技术有限公司
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.)
Filing date
Publication date
Application filed by 烟台杰瑞石油服务集团股份有限公司, 烟台杰瑞石油装备技术有限公司 filed Critical 烟台杰瑞石油服务集团股份有限公司
Publication of WO2013155734A1 publication Critical patent/WO2013155734A1/zh

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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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes

Definitions

  • the present invention relates to the field of oil drilling equipment, and more particularly to a coiled tubing clamping mechanism and an injection head employing the clamping mechanism.
  • the injection head is the core component of the coiled tubing equipment, and the clamping mechanism provides the clamping head with a clamping force for conveying the coiled tubing.
  • the clamping mechanism with rolling elements used on the injection head has the following defects due to the connection structure between the clamping block and the clamping block seat: First, the clamping block used on the clamping mechanism cannot be clamped. Sliding on the block seat is not conducive to the active centering adjustment of the clamping block, resulting in wear of the oil pipe and reducing the service life of the oil pipe. Second, the conventional clamping mechanism, the direct contact between the clamping block and the clamping block seat is not conducive to The impact of the buffer block on the tubing is severe, and the tubing is seriously worn. Patent number is
  • the utility model patent of 201120073047. 2 discloses a coiled tubing clamping device, wherein a hook block on the clamping block and a boss phase on the clamping block seat are passed between the clamping block and the clamping block seat. Fastening, which enables the clamping block to have a certain turbulence in the direction perpendicular to the clamping oil pipe on the clamping block seat, and through the limiting platform and the limiting platform provided on the clamping block seat The opposite limit bolts define the swaying position of the clamping block.
  • the technical problem to be solved by the present invention is to provide a new type of coiled tubing clamping mechanism to reduce the wear of the clamping mechanism to the clamped tubing, and to make the clamping mechanism more reliable, and the clamping block is replaced. More convenient.
  • the present invention adopts the following scheme:
  • a coiled tubing clamping mechanism comprising a saddle clamping block and a clamping block seat, the clamping block seat comprising a pin shaft and a rolling body sleeved on the pin shaft, the clamping block seat along the pin shaft
  • the direction is provided with two through holes for inserting the injection head chain connecting pin shaft, the upper portion of the clamping block seat is provided with three partition plates, and the partition plate is provided with a pin hole for mounting the pin shaft;
  • the utility model is characterized in that: a tongue platform is arranged on two sides of the saddle clamping block, an opening hole is arranged on the tongue platform, and a groove is arranged on the back of the saddle clamping block, and the two sides of the clamping block seat Separatingly, a pair of bosses are formed, and a slot corresponding to the slot is formed between the same side bosses, and a slot of the saddle-type clamping block is inserted into a slot of the clamping block seat, A crevice gap is left between the groove and the card slot along the pin axis direction, and the clamping block seat further has a threaded hole, and the threaded hole is provided with a saddle clamp for defining the saddle clamp Positioning screw for block position.
  • the saddle type clamping block is fixed by the positioning screw because the card slot formed by the boss on the clamping block seat defines the saddle type clamping block in a direction perpendicular to the direction of the clamped oil pipe.
  • the limit is fixed on the clamping block seat, which ensures that the clamping block can be moved with the oil pipe, and the cutting screw is not sheared, the wear of the oil pipe is avoided, and the injection head work is also improved. Reliability;
  • the saddle clamping block can be disengaged by simply unscrewing the two positioning screws, which facilitates the maintenance of the injection head.
  • the present invention can also be improved as follows.
  • the set screw is a plug screw, and the outer diameter of the screw of the plug screw is smaller than the diameter of the open hole.
  • the device further includes a gasket between the saddle clamping block and the clamping block seat, and the spacer is provided with a limiting hole corresponding to the bottom threaded hole of the clamping block seat.
  • the gasket can be Solid plates can also be provided with a certain number of holes.
  • the advantage of using the above further solution is that the elastic gasket can be used to effectively buffer the radial impact of the oil pipe on the clamping block, thereby protecting the oil pipe and the clamping block from being damaged.
  • the end of the pin shaft is further provided with an elastic damper for the shaft.
  • a further advantage of the above-described further solution is that the shaft is provided with an elastic damper for preventing the pin from being clamped. Further, the arc of the saddle clamping block is provided with a plurality of grooves perpendicular to the clamped oil pipe.
  • the rolling body is a rolling bearing or a rolling sleeve.
  • the present invention also provides a coiled tubing injection head characterized by: comprising the continuous tubing clamping mechanism described above.
  • the specific plan is as follows:
  • a tubing injection head comprises a drive sprocket, a drive chain, a support plate, a push plate and a clamping cylinder, wherein: the oil pipe clamping mechanism is mounted on the drive chain.
  • the clamping cylinder is fixed on the support plate
  • the oil pipe clamping mechanism is mounted on the transmission chain
  • the push plate is connected to the support plate through the movable connecting rod
  • the piston of the clamping oil cylinder is pressed against one side of the push plate.
  • the other side of the push plate is pressed against the rolling elements of the clamping base of the oil pipe clamping mechanism.
  • the beneficial effects of the oil pipe injection head are as follows: Since the oil pipe clamping mechanism of the invention has a large follow-up gap of the clamping block, the clamping block can automatically follow when the oil pipe is not straight, to avoid oil pipe injury or wear. , and the clamping block is easy to replace. The addition of a gasket in the clamping mechanism reduces the impact of the clamping block on the oil pipe and prolongs the service life of the oil pipe. DRAWINGS
  • FIG. 1 is a schematic structural view of a coiled tubing clamping mechanism of the present invention
  • Figure 2 is a front elevational view of the clamping block of the coiled tubing clamping mechanism of the present invention
  • Figure 3 is a side view of the clamping block of the coiled tubing clamping mechanism of the present invention.
  • Figure 4 is a front elevational view of the clamping block seat of the coiled tubing clamping mechanism of the present invention
  • Figure 5 is a side view of the clamping block seat of the coiled tubing clamping mechanism of the present invention.
  • Figure 6 is a bottom view of the clamping block seat of the coiled tubing clamping mechanism of the present invention.
  • Figure 7 is a front elevational view of the gasket of the coiled tubing clamping mechanism of the present invention.
  • Figure 8 is a schematic view of a tubing injection head employing the coiled tubing clamping mechanism of the present invention.
  • FIG. 1-7 1. clamping block, 2, set screw, 3, gasket, 4, clamping block seat, 5, rolling element, 6, pin shaft, 7, elastic damper for shaft; 101 , groove, 1 02, tongue, 103, opening hole; 104, groove, 301, limiting hole, 302, hole; 401, pin hole, 402, through hole, 403, partition, 404, threaded hole , 405, card slot, 406, boss.
  • a coiled tubing clamping mechanism comprising a saddle clamping block 1 and a clamping block seat 4 , the clamping block seat 4 including a pin 6 and being fitted on the pin shaft Rolling body 5, the clamping block seat 4 is provided with two through holes 402 for inserting and connecting the chain of the injection head chain in the direction of the pin shaft 6.
  • the upper part of the clamping block seat 4 is provided with three passages.
  • a plate 403, on the partition 403 is provided with a pin hole 401 for mounting the pin 6;
  • a tongue base 102 is disposed on both sides of the saddle clamp block 1 , and the tongue base 102 is provided with an opening hole 103 , and a back surface of the saddle clamp block 1 is provided with a groove 104.
  • a boss 406 There is a pair on each side of the block 4 a boss 406, a card slot 405 corresponding to the groove 104 is formed between the same side bosses, and the groove 104 of the saddle clamp block is inserted into the card slot of the clamping block seat 405, a gap is left between the groove 104 and the slot 405 in the direction of the pin 6.
  • the threaded hole 404 is further disposed on the clamping block 4
  • a set screw 2 for defining the position of the saddle clamp 1 is provided.
  • the set screw 2 is a plug screw, and the outer diameter of the screw of the plug screw is smaller than the diameter of the open hole 103.
  • the plug screw is also called a set screw, and the structure is generally connected by a screw head, a polished rod and a screw rod.
  • the diameter of the polished rod is larger than the lead screw, and a shoulder is formed at the joint between the polished rod and the lead rod.
  • the tongues 102 on the two sides of the clamping block 1 are stuck on the polished rod, so that the clamping block 1 has a swaying gap in the left-right direction with respect to the clamping block 4, and the gap size is affected by the gap.
  • the limitation of the card slot 405; the shoulder of the tapping screw is caught on the circular table of the threaded hole 404, and the limit is formed on the screw rod, so that the clamping block 1 also has a certain activity along the axial direction of the plug screw Clearance to ensure that the clamping block 1 can be flexibly moved.
  • the present invention further includes a gasket 3 interposed between the saddle clamp block 1 and the clamp block seat 4, and the gasket 3 is provided with a bottom threaded hole 404 with the clamp block seat 4.
  • the spacer 3 may be a solid flat plate, or a certain number of holes 302 may be provided.
  • the end of the pin 6 is also provided with a shaft yoke 7 for the shaft.
  • the arc of the saddle clamp block 1 is provided with a plurality of grooves 101 perpendicular to the clamped oil pipe.
  • the rolling bodies 5 are rolling bearings or rolling bushings.
  • the present invention also provides an injection head using the above-described coiled tubing clamping mechanism.
  • the specific plan is as follows:
  • a tubing injection head includes a drive sprocket 12 , a drive chain 13 , a support plate 14 , a push plate 15 , a clamping cylinder 16 , the support plate 14 , a clamping cylinder 16 , and a push plate 15 .
  • the utility model is characterized in that: a plurality of sets of the oil pipe clamping mechanisms 11 are continuously mounted on the transmission chain 13 .
  • the support plate 14 is fixed on the frame of the injection head, and the clamp The hydraulic cylinder 16 is fixed on the support plate 14 , and the oil pipe clamping mechanism 1 1 is mounted on the transmission chain 13 through the through hole 402 , and the push plate 15 is connected to the support plate 14 via the movable link 18 , in this example
  • One end of the movable link is a joint bearing connected to the push plate 15, and the other end is inserted into the sleeve 19 fixed to the support plate 14, and the movable link 18 can be applied to the sleeve 19 with the force of the push plate 15. slide.
  • the cylinder piston 17 of the clamp cylinder 16 is pressed against one side of the push plate 15, and the other surface of the push plate 15 is pressed against the rolling elements 5 of the clamp base of the oil pipe clamping mechanism 11.
  • the push plate 15 presses the oil pipe clamping mechanism 11
  • the drive sprocket 12 drives the drive chain 13 and drives the oil pipe clamping mechanism 11 to convey the oil pipe forward, and the rolling body 5 rolls on the push plate 15.
  • the oil pipe moves in a set direction under the action of two pairs of two saddle clamping blocks.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Clamps And Clips (AREA)

Abstract

一种连续油管夹持机构，其包括鞍型夹持块（1）及夹持块座（4），所述鞍型夹持块（1）连接在夹持块座（4）上，鞍型夹持块（1）的两侧设有舌台（102），舌台（102）上设有开口孔（103），鞍型夹持块（1）的背部设有凹槽（104），夹持块座（4）两侧分别设有一对凸台（406），鞍型夹持块（1）的凹槽（104）插装在由夹持块座凸台（406）形成的卡槽（405）上，凹槽（104）与卡槽（405）之间留有窜动间隙，夹持块座（4）上设有用于限定鞍型夹持块（1）位置的定位螺钉（2）。还公开一种采用该连续油管夹持机构的注入头，其包括油管夹持机构（11）及传动链条（13），油管夹持机构（11）通过夹持块座（4）上的两个销轴孔（401）安装在传动链条（13）上。其能有效避免对油管的磨损，使用可靠，同时便于夹持块更换。

Description

一种连续油管夹持机构及釆用该夹持机构的注入头 技术领域
本发明涉及石油钻采设备领域， 特别涉及一种连续油管夹持机构， 还涉 及采用该夹持机构的注入头。
背景技术
注入头是连续油管设备的核心部件， 夹持机构为注入头提供夹紧力， 用 于输送连续油管。 目前常用的注入头上所使用的带有滚动体的夹持机构由于 夹持块和夹持块座之间的连接结构原因存在如下缺陷： 一是夹持机构上使用 的夹持块不能在夹持块座上滑动， 不利于夹持块的主动对中调整， 导致磨损 油管， 降低了油管的使用寿命； 二是传统的夹持机构， 夹持块与夹持块座间 直接接触， 不利于緩沖夹持块对油管的沖击， 对油管的磨损严重。 专利号为
201120073047. 2的实用新型专利公开了一种连续油管夹持装置，其夹持块和 夹持块座之间通过所述夹持块上的钩块和所述夹持块座上的凸台相扣接， 这 使得夹持块可以在夹持块座上沿垂直于所夹持油管的方向有一定的窜动， 并 通过设于所述夹持块座上的限位台和与限位台相对的限位螺栓限定夹持块 的窜动位置。 这样虽然较好的解决了上述因夹持块不能活动所带来的问题， 并使得夹持块更换较为容易， 但尚存在如下不足： 由于工作中夹持块的随机 窜动对限位螺栓产生频繁的剪切力， 造成该限位螺栓断裂频繁， 影响注入头 连续工作； 再是更换夹持块时需要沿油管方向移动夹持块以使钩块和凸台脱 钩， 不便操作。
发明内容
本发明要解决的技术问题是， 提供一种新型的连续油管夹持机构， 以减 少夹持机构对所夹持油管的磨损， 并使得夹持机构使用更可靠， 夹持块更换 更便捷。
为了解决以上技术问题， 本发明采用如下方案：
一种连续油管夹持机构， 包括鞍型夹持块及夹持块座， 所述夹持块座包 括销轴及套装于所述销轴上的滚动体， 所述夹持块座沿销轴方向， 设有用于 插装注入头链条连接销轴的两个通孔， 所述夹持块座的上部设有三道隔板， 在所述隔板上设有用于安装销轴的销轴孔；
其特点在于：所述鞍型夹持块的两侧设有舌台，所述舌台上设有开口孔， 所述鞍型夹持块的背部设有 槽， 所述夹持块座两侧分别设有一对凸台， 在 所述同侧凸台之间形成与所述 槽相对应的卡槽，所述鞍型夹持块的 槽插 装在所述夹持块座的卡槽上，所述 槽与所述卡槽之间沿所述销轴方向留有 窜动间隙， 所述夹持块座上还设有螺纹孔， 所述螺纹孔上设有用于限定所述 鞍型夹持块位置的定位螺釘。
本发明的有益效果是： 由于通过夹持块座上的凸台形成的卡槽限定了鞍 型夹持块沿垂直于所夹持油管的方向窜动位置， 采用定位螺釘把鞍型夹持块 限位固定在所述夹持块座上， 这样既保证了夹持块能随油管有一定窜动， 又 不会对定位螺釘产生剪切， 避免了对油管的磨损， 也提高了注入头工作的可 靠性； 另外， 在需要更换夹持块时， 只要旋出两个定位螺釘即可使鞍型夹持 块脱离， 便于注入头的维护。
在上述技术方案的基础上， 本发明还可以做如下改进。
进一步的， 所述定位螺釘是塞打螺釘， 所述塞打螺釘的螺杆外径小于所 述开口孔的直径。
采用上述进一步方案的有益效果是，塞打螺釘的上部穿过所述鞍型夹持 块的开口孔， 夹持块受夹持块座卡槽的限制不会对螺釘产生剪切力。
进一步的， 还包括垫于所述鞍型夹持块和所述夹持块座之间的垫片， 所 述垫片上设有与所述夹持块座的底部螺纹孔对应的限位孔， 所述垫片可以是 实心平板， 也可以设有一定数量的孔。
采用上述进一步方案的有益效果是，选用弹性垫片可以有效緩沖油管对 夹持块产生的径向沖击， 从而保护油管及夹持块不被损坏。
进一步的， 所述销轴的端部还设有轴用弹性挡圏。
采用上述进一步方案的有益效果是， 轴用弹性挡圏用于防止销轴窜位。 进一步的， 所述鞍型夹持块的圓弧上设有若干垂直于所夹持油管的沟 槽。
采用上述进一步方案的有益效果是， 沟槽可以容纳进入夹持块圓弧的杂 质， 对油管起保护作用。
进一步的， 所述滚动体是滚动轴承或滚动轴套。
采用上述进一步方案的有益效果是， 滚动轴承或滚动轴套在注入头推板 上滚动， 能减小夹持机构的运动阻力。
本发明还提供了一种连续油管注入头， 其特征在于： 包括以上所述的连 续油管夹持机构。 具体方案如下：
一种油管注入头， 包括驱动链轮、传动链条、 支撑板、推板、 夹紧油缸， 其特点是： 所述传动链条上安装有所述油管夹持机构。 夹紧油缸固定在支撑 板上， 所述油管夹持机构安装于传动链条上， 所述推板通过活动连杆连接于 支撑板上， 夹紧油缸的活塞压靠在所述推板一面， 所述推板另一面压在所述 油管夹持机构的夹持底座的滚动体上。 当油管注入头工作时， 推板压紧油管 夹持机构， 传动链条带动油管夹持机构将油管向前输送， 滚动轴套在链条压 板上滚动。
本油管注入头的有益效果是： 由于采用本发明的油管夹持机构， 其夹持 块的随动间隙大， 可以在油管不是^艮直时， 夹持块自动跟动， 避免油管受伤 或磨损， 并且夹持块容易更换。 夹持机构内增加垫片， 减少了夹持块对油管 的沖击， 延长了油管的使用寿命。 附图说明
图 1是本发明连续油管夹持机构的结构示意图；
图 2是本发明连续油管夹持机构的夹持块主视图；
图 3是本发明连续油管夹持机构的夹持块侧视图；
图 4是本发明连续油管夹持机构的夹持块座主视图；
图 5是本发明连续油管夹持机构的夹持块座侧视图；
图 6是本发明连续油管夹持机构的夹持块座仰视图；
图 7是本发明连续油管夹持机构的垫片主视图；
图 8是采用本发明连续油管夹持机构的一种油管注入头示意图。
在图 1一图 7中： 1、 夹持块、 2、 定位螺釘， 3、 垫片， 4、 夹持块座， 5、 滚动体， 6、 销轴， 7、 轴用弹性挡圏； 101、 沟槽， 1 02、 舌台， 103、 开口 孔； 104、 凹槽， 301、 限位孔， 302、 孔； 401、 销轴孔， 402、 通孔， 403、 隔板， 404、 螺纹孔， 405、 卡槽， 406、 凸台。
在图 8 中： 5、 滚动体， 1 1、 油管夹持机构， 12、 驱动链轮， 1 3、 传动 链条， 14、 支撑板， 15、 推板， 16、 夹紧油缸， 17、 油缸活塞， 18、 活动连 杆， 19、 轴套。
具体实施方式
下面结合附图对本发明的具体实施方式作详细说明：
如图 1一图 7所示： 一种连续油管夹持机构， 包括鞍型夹持块 1及夹持 块座 4 , 所述夹持块座 4包括销轴 6及套装于所述销轴上的滚动体 5 , 所述 夹持块座 4沿销轴 6方向，设有用于插装与注入头链条连接销轴的两个通孔 402 ,所述夹持块座 4的上部设有三道隔板 403 ,在所述隔板 403上设有用于 安装销轴 6的销轴孔 401 ;
所述鞍型夹持块 1的两侧设有舌台 102 ,所述舌台 102上设有开口孔 1 03 , 所述鞍型夹持块 1的背部设有凹槽 104 , 所述夹持块座 4两侧分别设有一对 凸台 406 , 在所述同侧凸台之间形成与所述凹槽 104相对应的卡槽 405 , 所 述鞍型夹持块的凹槽 104插装在所述夹持块座的卡槽 405上， 所述凹槽 104 与所述卡槽 405之间沿所述销轴 6方向留有窜动间隙， 所述夹持块座 4上还 设有螺纹孔 404 , 所述螺纹孔 404上设有用于限定所述鞍型夹持块 1位置的 定位螺釘 2。
所述定位螺釘 2是塞打螺釘， 所述塞打螺釘的螺杆外径小于所述开口孔 103的直径。 所述塞打螺釘也叫止动螺釘， 其结构一般是螺釘头、 光杆及丝 杆依次连接， 光杆直径大于丝杠， 在光杆与丝杆连接处形成台肩。
具体实施中， 所述夹持块 1两侧的舌台 1 02卡在所述光杆上， 使所述夹 持块 1相对夹持块座 4在左右方向有窜动间隙， 此间隙大小受所述卡槽 405 的限制； 所述塞打螺釘的台肩卡在所述螺纹孔 404的圓台上， 对丝杆形成限 位作用， 使夹持块 1在沿塞打螺釘轴向也有一定活动间隙， 以保证夹持块 1 能灵活窜动。
本发明还包括垫于所述鞍型夹持块 1和所述夹持块座 4之间的垫片 3 , 所述垫片 3上设有与所述夹持块座 4的底部螺纹孔 404对应的限位孔 301 , 所述垫片 3可以是实心平板， 也可以设有一定数量的孔 302。
所述销轴 6的端部还设有轴用弹性挡圏 7。
所述鞍型夹持块 1的圓弧上设有若干垂直于所夹持油管的沟槽 101。 所述滚动体 5是滚动轴承或滚动轴套。
本发明还提供一种采用上述连续油管夹持机构的注入头。 具体方案如 下：
如图 8所示： 一种油管注入头， 包括驱动链轮 12、 传动链条 1 3、 支撑 板 14、 推板 15、 夹紧油缸 16 , 所述支撑板 14、 夹紧油缸 16、 推板 15等安 装在所述传动链条 1 3所形成闭环的内部。 其特点是： 所述传动链条 1 3上连 续安装有多组所述油管夹持机构 11。 支撑板 14固定于注入头的机架上， 夹 紧油缸 16固定在支撑板 14上， 所述油管夹持机构 1 1通过通孔 402安装于 传动链条 1 3上， 所述推板 15通过活动连杆 18连接于支撑板 14上， 本例中 活动连杆的一端是关节轴承， 连接于推板 15上， 另一端插入固定于支撑板 14上的轴套 19 中， 并且活动连杆 18可以随推板 15受力情况而在轴套 19 上滑动。 夹紧油缸 16的油缸活塞 17压靠在所述推板 15的一面上， 所述推 板 15另一面压在所述油管夹持机构 11的夹持底座的滚动体 5上。 当油管注 入头工作时， 推板 15压紧油管夹持机构 11 , 驱动链轮 12驱动传动链条 1 3 , 并带动油管夹持机构 11将油管向前输送， 滚动体 5在推板 15上滚动， 在两 对面两个鞍型夹持块的作用下， 油管向设定方向运动。
以上所述仅为本发明的较佳实施方式， 并不用以限制本发明， 凡在本发 明的精神和原则之内， 所作的任何修改、 等同替换等， 均应包含在本发明的 保护范围之内。

Claims

权 利 要 求 书
1、 一种连续油管夹持机构， 包括鞍型夹持块（1 )及夹持块座（4 ), 所 述夹持块座（ 4 ) 包括销轴（ 6 )及套装于所述销轴上的滚动体（ 5 ) , 所述夹 持块座（4 )沿销轴（6 )方向， 设有用于插装注入头链条连接销轴的两个通 孔（ 402 ),所述夹持块座（4 )的上部设有三道隔板（ 403 ),在所述隔板（ 403 ) 上设有用于安装销轴（ 6 ) 的销轴孔（ 401 );
其特征在于： 所述鞍型夹持块（1 ) 的两侧设有舌台 （102 ), 所述舌台 ( 102 )上设有开口孔（ 103 ), 所述鞍型夹持块（ 1 )的背部设有凹槽（ 104 ), 所述夹持块座（4 ) 两侧分别设有一对凸台 （ 406 ), 在所述同侧凸台 （ 406 ) 之间形成与所述凹槽（ 104 )相对应的卡槽（ 405 ), 所述鞍型夹持块的凹槽 ( 104 )插装在所述夹持块座的卡槽（ 5 )上， 所述凹槽（ 1(M ) 与所述卡 槽（405 )之间沿所述销轴 （6 ) 方向留有窜动间隙， 所述夹持块座（4 )上 还设有螺纹孔（ 404 )， 所述螺纹孔（ 404 )上设有用于限定所述鞍型夹持块 ( 1 )位置的定位螺釘（2 )。
2、 根据权利要求 1 所述的连续油管夹持机构， 其特征在于： 所述定位 螺釘（ 2 )是塞打螺釘。
3、 根据权利要求 1或 2所述的连续油管夹持机构， 其特征在于： 还包 括垫于所述鞍型夹持块（ 1 )和所述夹持块座（ 4 )之间的垫片 （ 3 ) , 所述垫 片（ 3 )上设有与所述夹持块座（ 4 )的底部螺纹孔（ 404 )对应的限位孔（ 301 ), 所述垫片 （ 3 )可以是实心平板， 也可以设有一定数量的孔（ 302 )。
4、 根据权利要求 3所述的连续油管夹持机构， 其特征在于： 所述销轴 ( 6 ) 的端部还设有轴用弹性挡圏 （ 7 )。
5、 根据权利要求 4所述的连续油管夹持机构， 其特征在于： 所述鞍型 夹持块（1 ) 的圓弧上设有若干垂直于所夹持油管的沟槽（101 )。
6、 根据权利要求 5 所述的连续油管夹持机构， 其特征在于： 所述滚动 体（ 5 )是滚动轴承或滚动轴套。
7、 一种油管注入头， 其特征在于： 包括如权利要求 1 ~ 6任一项所述的 连续油管夹持机构。
PCT/CN2012/074908 2012-04-19 2012-04-28 一种连续油管夹持机构及采用该夹持机构的注入头 WO2013155734A1 (zh)

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