CN115949370A - Light ring type dissolvable bridge plug - Google Patents
Light ring type dissolvable bridge plug Download PDFInfo
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- CN115949370A CN115949370A CN202310224632.5A CN202310224632A CN115949370A CN 115949370 A CN115949370 A CN 115949370A CN 202310224632 A CN202310224632 A CN 202310224632A CN 115949370 A CN115949370 A CN 115949370A
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- 239000002184 metal Substances 0.000 claims abstract description 38
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
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- 238000005260 corrosion Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 230000000712 assembly Effects 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
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Abstract
Description
技术领域technical field
本发明涉及油层封堵设备技术领域,尤其是涉及一种光圈型可溶解桥塞。The invention relates to the technical field of oil layer plugging equipment, in particular to an aperture type dissolvable bridge plug.
背景技术Background technique
在油田的勘探开采中需要一种临时性的封堵工艺,来封堵当前的生产层,以便于对其他产层进行实施开采,待工艺完成以后,接触临时封堵,建立生产层与井筒的流动通道,实现对油、气井的采油、采气生产。虽然桥塞的封堵技术在开发和改造的过程中得到了广泛的应用,但是桥塞中存在以下技术问题,桥塞在坐封完成后的过程中存在封堵效果不稳定,并不能封堵当前的生产层,导致桥塞起不到封堵的作用,从而使得生产无法正常进行,同时还发现永久性桥塞的溶解不完全,存在大量橡胶等不溶解的物质,需要人工打捞,这就消耗了工期和人力。In the exploration and production of oil fields, a temporary plugging process is needed to block the current production layer so as to facilitate the exploitation of other production layers. After the process is completed, contact temporary plugging to establish the connection between the production layer and the wellbore. The flow channel realizes the oil and gas production of oil and gas wells. Although the plugging technology of bridge plugs has been widely used in the process of development and reconstruction, there are the following technical problems in the bridge plugs. The plugging effect of the bridge plugs is unstable after the completion of the setting process and cannot be plugged In the current production layer, the bridge plug cannot play the role of plugging, so that the production cannot be carried out normally. At the same time, it is also found that the permanent bridge plug is not completely dissolved, and there are a lot of insoluble substances such as rubber, which need to be salvaged manually. Consumed time and manpower.
发明内容Contents of the invention
本发明的目的是提供一种光圈型可溶解桥塞,通过上下椎体对光圈结构的施力实现进行变径坐封,封堵效果稳定持久。The purpose of the present invention is to provide an aperture-type dissolvable bridge plug, which realizes variable-diameter setting by applying force to the aperture structure from the upper and lower vertebral bodies, and the sealing effect is stable and long-lasting.
为实现上述目的,本发明提供了一种光圈型可溶解桥塞,套设于管轴上,所述管轴套设于芯轴上,其特征在于:包括依次设置的上压环、上卡瓦组件、上卡瓦压台、第一压环、上椎体、光圈结构、下椎体、第二压环、下卡瓦压台、下卡瓦组件、下压环和定位推套,所述上椎体为圆锥面朝下的空心圆锥体,所述上椎体的底部伸入所述光圈结构内,所述下椎体为圆锥面朝上的空心圆锥体,所述下椎体的顶部伸入所述光圈结构内,所述光圈结构包括若干依次搭接的弧形金属片,所述弧形金属片的内壁中部设置有滑轮装置,相邻所述弧形金属片的外壁上设置有与所述滑轮装置相配合的滑轨。In order to achieve the above purpose, the present invention provides an aperture type dissolvable bridge plug, which is sleeved on the tube shaft, and the tube shaft is sleeved on the mandrel, and is characterized in that it includes an upper pressure ring, an upper clip The shoe assembly, the upper slip table, the first pressure ring, the upper cone, the aperture structure, the lower cone, the second pressure ring, the lower slip table, the lower slip assembly, the lower pressure ring and the positioning push sleeve, all The above-mentioned upper vertebral body is a hollow cone with the conical face facing down, the bottom of the upper vertebral body extends into the aperture structure, and the lower vertebral body is a hollow cone with the conical face facing upwards, and the bottom of the lower vertebral body The top protrudes into the aperture structure, and the aperture structure includes several arc-shaped metal sheets overlapped in sequence, a pulley device is arranged in the middle of the inner wall of the arc-shaped metal sheet, and a pulley device is arranged on the outer wall adjacent to the arc-shaped metal sheet. There are slide rails matched with the pulley assembly.
优选的,所述上压环的顶部设置有挤压凸台,所述上压环固定在所述上卡瓦组件的顶端,所述上卡瓦压台的顶端伸入所述上卡瓦组件与所述管轴之间。Preferably, the top of the upper pressure ring is provided with an extruding boss, the upper pressure ring is fixed on the top of the upper slip assembly, and the top of the upper slip pressing platform extends into the upper slip assembly between the tube axis.
优选的,所述定位推套与所述下压环固定连接,所述下压环与所述下卡瓦组件固定连接,所述下卡瓦压台的底端伸入所述下卡瓦组件与所述管轴之间。Preferably, the positioning push sleeve is fixedly connected to the lower pressure ring, the lower pressure ring is fixedly connected to the lower slip assembly, and the bottom end of the lower slip pressing table extends into the lower slip assembly between the tube axis.
优选的,所述上卡瓦压台与所述第一压环相连接,所述第一压环的下端面与所述上椎体的上端面相接触,所述下卡瓦压台与所述第二压环相连接,所述第二压环的上端面与所述下椎体的下端面相接触。Preferably, the upper slip table is connected to the first pressure ring, the lower end surface of the first pressure ring is in contact with the upper end surface of the upper vertebral body, and the lower slip table is connected to the The second pressure ring is connected, and the upper end surface of the second pressure ring is in contact with the lower end surface of the lower vertebral body.
优选的,所述管轴的半径小于所述上椎体的下端面内径和所述下椎体的上端面内径,所述上椎体的下端面内径和所述下椎体的上端面内径小于所述光圈结构的初始状态内径。Preferably, the radius of the tube axis is smaller than the inner diameter of the lower end surface of the upper vertebral body and the inner diameter of the upper end surface of the lower vertebral body, and the inner diameter of the lower end surface of the upper vertebral body and the inner diameter of the upper end surface of the lower vertebral body are less than The initial state inner diameter of the aperture structure.
优选的,所述弧形金属片的最外端设置有防漏橡胶条,所述防漏橡胶条与相邻所述弧形金属片的外壁相接触。Preferably, the outermost end of the arc-shaped metal sheet is provided with a leak-proof rubber strip, and the leak-proof rubber strip is in contact with the outer wall of the adjacent arc-shaped metal sheet.
优选的,所述光圈结构的上表面和下表面中央分别设置有金属薄片。Preferably, thin metal sheets are respectively arranged at the center of the upper surface and the lower surface of the aperture structure.
因此,本发明采用上述结构的一种光圈型可溶解桥塞,通过上下卡瓦组件分别压迫上椎体和下椎体,上椎体和下椎体对光圈结构施力,使光圈结构变形变径,达到坐封效果,其封堵效果稳定持久;并且整体采用可溶解材料,避免现有的永久性桥塞溶解不完全,需要人工打捞的问题。Therefore, the present invention adopts a kind of aperture type dissolvable bridge plug with the above-mentioned structure. The upper and lower vertebral bodies are respectively pressed by the upper and lower slip assemblies. diameter, to achieve the setting effect, and its sealing effect is stable and long-lasting; and the overall use of dissolvable materials avoids the problem of incomplete dissolution of the existing permanent bridge plug and the need for manual salvage.
下面通过附图和实施例,对本发明的技术方案做进一步的详细描述。The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
附图说明Description of drawings
图1为本发明一种光圈型可溶解桥塞实施例的结构示意图;Fig. 1 is a schematic structural view of an embodiment of an aperture type dissolvable bridge plug of the present invention;
图2为本发明实施例的光圈结构初始状态俯视图;2 is a top view of the initial state of the aperture structure of the embodiment of the present invention;
图3为本发明实施例的光圈结构封堵状态俯视图;Fig. 3 is a top view of the blocking state of the aperture structure of the embodiment of the present invention;
图4为本发明实施例的弧形金属片外壁结构示意图。Fig. 4 is a schematic diagram of the outer wall structure of the arc-shaped metal sheet according to the embodiment of the present invention.
附图标记reference sign
1、芯轴;2、管轴;3、挤压凸台;4、上压环;5、上卡瓦组件;6、上卡瓦压台;7、第一压环;8、上椎体;9、光圈结构;10、弧形金属片;11、下椎体;12、第二压环;13、下卡瓦压台;14、下卡瓦组件;15、下压环;16、定位推管;17、滑轨;18、防漏橡胶条;19、金属薄片。1. Mandrel; 2. Tube shaft; 3. Extrusion boss; 4. Upper pressure ring; 5. Upper slip assembly; 6. Upper slip pressure table; 7. First pressure ring; 8. Upper vertebral body ;9. Aperture structure; 10. Arc-shaped metal sheet; 11. Lower vertebral body; 12. Second pressure ring; 13. Lower slip pressure platform; 14. Lower slip assembly; 15. Lower pressure ring; 16. Positioning Push tube; 17, slide rail; 18, leak-proof rubber strip; 19, metal sheet.
具体实施方式Detailed ways
以下通过附图和实施例对本发明的技术方案作进一步说明。The technical solutions of the present invention will be further described below through the accompanying drawings and embodiments.
实施例Example
如图所示,一种光圈型可溶解桥塞,套设于管轴2上,管轴2套设于芯轴1上。桥塞包括依次设置的上压环4、上卡瓦组件5、上卡瓦压台6、第一压环7、上椎体8、光圈结构9、下椎体11、第二压环12、下卡瓦压台13、下卡瓦组件14、下压环15和定位推套16。As shown in the figure, an aperture type dissolvable bridge plug is sheathed on the tube shaft 2 , and the tube shaft 2 is sleeved on the mandrel 1 . The bridge plug includes an upper pressure ring 4, an upper slip assembly 5, an upper slip pressure table 6, a
上椎体8、下椎体11和光圈结构9均采用可溶解材料,但其耐腐蚀性应略高于桥塞本身所用材料,其中上卡瓦压台6、中心管轴2和下卡瓦压台13可以与现有卡瓦压台材质相同,也可以不同。其中第一压环7和第二要足够支撑卡瓦压台与锥形体之间的压力传导,要求具有较高的强度。The upper
上压环4的顶部设置有挤压凸台3,上压环4固定在上卡瓦组件5的顶端,上压环4通过上卡瓦组件5对上卡瓦压台6施力。在轴向力的作用下,上卡瓦压台6的顶端伸入上卡瓦组件5与管轴2之间,起到坐封的作用。上卡瓦压台6与第一压环7相连接,第一压环7的下端面与上椎体8的上端面相接触,上卡瓦压台6通过第一压环7压迫上椎体8。The top of the upper pressure ring 4 is provided with an
定位推套16与下压环15固定连接,下压环15与下卡瓦组件14固定连接,下卡瓦压台13的底端伸入下卡瓦组件14与管轴2之间。下卡瓦压台13与第二压环12相连接,第二压环12的上端面与下椎体11的下端面相接触,下卡瓦压台13通过第二压环12压迫下椎体11。其中第一压环7与上椎体8、第二压环12与下椎体11都需紧密接触,其作用是防止桥塞所受的轴向力在传导的过程中发生损失。上卡瓦压台6与第一压环7的紧密连接和下卡瓦压台13与第二压环12的紧密连接,是为了防止轴向力传导过程中的损耗。同时,第一压环7和第二压环12的存在能够防止上下卡瓦台与上下椎体直接接触发生金属摩擦,避免损耗材料,从而影响性能。The
上椎体8为圆锥面朝下的空心圆锥体,上椎体8的底部伸入光圈结构9内,下椎体11为圆锥面朝上的空心圆锥体,下椎体11的顶部伸入光圈结构9内。上椎体8和下椎体11的斜面程度决定了光圈结构9的运动时间,斜面坡度越大,光圈结构9运动完成的速率越快。管轴2的半径小于上椎体8的下端面内径和下椎体11的上端面内径,使上椎体8和下椎体11可以在轴向力的作用下轻松的沿着管轴2滑动。上椎体8的下端面和下椎体11的上端面具有相配合的卡接结构,使上椎体8和下椎体11发生接触后锁死,能够避免上下椎体倒退后使得光圈结构9回缩,使得封堵效果失效。The upper
光圈结构9包括15个依次搭接的弧形金属片10,弧形金属片10的内边缘构成内圆面,弧形金属片10的外边缘构成外圆面。弧形金属片10的厚度和数量在一定程度上决定了光圈结构9扩张后的半径,影响桥塞的封堵效果,因此可根据实际需要进行设计。The aperture structure 9 includes 15 arc-shaped
弧形金属片10的内壁中部设置有滑轮装置,滑轮装置垂直于轴向,相邻的弧形金属片10的外壁上设置与滑轮装置相配合的滑轨17。滑轮装置和滑轨17能够避免弧形金属片10在运动过程中脱落致使封堵效果失效。通过限定滑轮装置在滑轨17上的移动距离,能够改变光圈结构9扩张后的外圆面半径,因此可根据实际需要灵活调整。The middle part of the inner wall of the arc-shaped
上椎体8的下端面内径和下椎体11的上端面内径小于光圈结构9的初始状态内径。光圈结构9的上下端空心圆表面设置有金属薄片19,其作用是固定弧形金属片10的初始形态,并且防止桥塞在运输的过程中,上下椎体受到轴向力向光圈结构9靠拢,使得光圈结构9提前受力向外扩张。其扩张的部分会影响桥塞的运输,同时会使得桥塞运输到指定地点后的环境半径变大,避免光圈结构9在受力向外运动完成后仍不能起到桥塞的封堵作用。The inner diameter of the lower end surface of the upper
当上椎体8和下椎体11分别受到轴向力的作用向光圈结构9靠拢时,首先击碎金属薄片19,然后上下椎体的圆锥面推动内圆面向外扩张,弧形金属片10受力运动,滑轮装置开始沿着滑轨17运动,使弧形金属片10的外边缘沿着相邻弧形金属片10的外壁从外向内运动,每个弧形金属片10的运动轨迹都相同。最终形成的封堵状态的光圈结构9与初始状态的光圈结构9相比,相邻弧形金属片10的覆盖面积减小,内圆面的半径与上椎体8的上端面半径、下椎体11的下端面半径相同。When the upper
弧形金属片10的最外端设置有防漏橡胶条18,防漏橡胶条18与相邻弧形金属片10的外壁相接触。防漏橡胶条18覆盖在两片弧形金属片10的连接缝隙处,防止桥塞在工作环境中的溶液泄露进入相邻弧形金属片10的外壁与内壁之间,导致滑轮装置和滑轨17内存有泥沙,或提前腐蚀致使的光圈结构9失效。在光圈结构9进入封堵状态后,防漏橡胶条18能够封堵外圆面上的缝隙,加强桥塞的封堵效果。相比于现有的永久性桥塞,整个桥塞结构中仅存在防漏橡胶条18这一部分的不可溶解物质,减少桥塞溶解后的残余物量,更有利于施工的便利性。The outermost end of the arc-shaped
最后应说明的是:以上实施例仅用以说明本发明的技术方案而非对其进行限制,尽管参照较佳实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对本发明的技术方案进行修改或者等同替换,而这些修改或者等同替换亦不能使修改后的技术方案脱离本发明技术方案的精神和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it still Modifications or equivalent replacements can be made to the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN116771302A (en) * | 2023-08-17 | 2023-09-19 | 太原科技大学 | Umbrella-shaped expansion type bridge plug with plugging structure |
CN116856881A (en) * | 2023-09-04 | 2023-10-10 | 太原科技大学 | An embedded blocking structure bridge plug and its setting method |
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CN116771302B (en) * | 2023-08-17 | 2023-10-27 | 太原科技大学 | Umbrella-shaped expansion type bridge plug with plugging structure |
CN116856881A (en) * | 2023-09-04 | 2023-10-10 | 太原科技大学 | An embedded blocking structure bridge plug and its setting method |
CN116856881B (en) * | 2023-09-04 | 2023-11-17 | 太原科技大学 | Bridge plug with embedded plugging structure and bridge plug setting method thereof |
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