CN219492263U - Easily-recovered hanging packer - Google Patents
Easily-recovered hanging packer Download PDFInfo
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- CN219492263U CN219492263U CN202320449823.7U CN202320449823U CN219492263U CN 219492263 U CN219492263 U CN 219492263U CN 202320449823 U CN202320449823 U CN 202320449823U CN 219492263 U CN219492263 U CN 219492263U
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- 238000004873 anchoring Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 125000006850 spacer group Chemical group 0.000 claims description 18
- 238000010008 shearing Methods 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 238000007789 sealing Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003755 preservative agent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
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Abstract
Description
技术领域technical field
本实用新型涉及油气田完井工具技术领域,具体地,涉及一种易回收的悬挂封隔器。The utility model relates to the technical field of well completion tools in oil and gas fields, in particular to an easily recoverable suspension packer.
背景技术Background technique
近年来,随着海上或陆地油气田的深入开发,多点开采、大面积铺设井架钻采原油已成为未来趋势,因此完井工具的应用也随之呈现爆发式增长,而回收型封隔器是一种常规且普遍应用的完井开采工具之一,其超强的抗拉强度和铆定能力在整条工具串中起着至关重要的作用,是保证井下正常作业的基础。In recent years, with the in-depth development of offshore or onshore oil and gas fields, multi-point exploitation and large-area derrick drilling and production of crude oil have become the future trend, so the application of well completion tools has also shown explosive growth, and the recovery packer is One of the conventional and widely used well completion and production tools, its super tensile strength and riveting ability play a vital role in the entire tool string, and are the basis for ensuring normal downhole operations.
而大多回收型悬挂封隔器中,通常采用胶筒在上方、卡瓦在下方的方式,当井底有较大的压差时,环空上顶力作用在中心管上,中心管承受的上顶力则会作用于安装在中心管与解封零件上的回收剪且销钉,过大的上顶力容易把回收剪切销钉切断,造成封隔器自行解封,因此需要更大的解封力来防止井底上顶力过大造成封隔器自行解封的风险,但过大的解封力不利于后续封隔器的解封回收。In most recovery suspension packers, the rubber tube is on the top and the slips are on the bottom. When there is a large pressure difference at the bottom of the well, the upper force of the annulus acts on the center pipe, and the center pipe bears The jacking force will act on the recovery shear pin installed on the center pipe and the unsealing part. Excessive jacking force will easily cut the recovery shear pin and cause the packer to unsealing by itself, so a larger unsealing is required. The sealing force is used to prevent the risk of the packer unsealing due to excessive top force on the bottom of the well, but excessive unsealing force is not conducive to the subsequent unsealing and recovery of the packer.
实用新型内容Utility model content
针对现有技术的不足,本实用新型提供一种易回收的悬挂封隔器,包括:中心管、由上至下依次套设于中心管外的锚定卡瓦组件、活塞组件、胶筒组件、解封组件及C形环;Aiming at the deficiencies of the prior art, the utility model provides an easy-to-recover suspension packer, including: a central pipe, an anchor slip assembly, a piston assembly, and a rubber cartridge assembly that are sleeved outside the central pipe from top to bottom. , Unsealing components and C-rings;
中心管外壁由上至下依次设有固定孔、环形凹槽、解封孔及环形安装槽,环形凹槽内设有传压通孔,锚定卡瓦组件一端与固定孔固定连接,活塞组件套设于环形凹槽外且于传压通孔连通,其两端分别螺纹连接于锚定卡瓦组件另一端及胶筒组件一端,解封组件与解封孔固定连接并抵接胶筒组件另一端,C形环固定安装于C形环安装槽。The outer wall of the central tube is provided with a fixing hole, an annular groove, an unsealing hole and an annular installation groove in sequence from top to bottom. There is a pressure transmission hole in the annular groove. One end of the anchor slip assembly is fixedly connected with the fixing hole, and the piston assembly It is sleeved outside the annular groove and communicated with the pressure transmission hole, and its two ends are threadedly connected to the other end of the anchor slip component and one end of the rubber tube component, and the unsealing component is fixedly connected to the unsealing hole and abuts the rubber tube component At the other end, the C-shaped ring is fixedly installed in the C-shaped ring installation groove.
根据本实用新型的一实施方式,中心管还设有穿孔,穿孔贯穿于中心管两端,并与中心管管道相邻设置。According to an embodiment of the present utility model, the central tube is further provided with perforations, and the perforations penetrate both ends of the central tube and are arranged adjacent to the central tube.
根据本实用新型的一实施方式,锚定卡瓦组件包括由上至下设于中心管的卡瓦上椎体、卡瓦组件及卡瓦下椎体,卡瓦上椎体与卡瓦下椎体相对设置,卡瓦组件两端分别抵接卡瓦上椎体及卡瓦下椎体,卡瓦上椎体与固定孔固定连接,卡瓦下椎体与活塞组件螺纹连接。According to one embodiment of the present invention, the anchoring slip assembly includes an upper slip body, a slip assembly, and a lower slip body arranged on the central tube from top to bottom, the upper slip body and the lower The two ends of the slip assembly are respectively abutted against the upper and lower vertebral bodies of the slips, the upper vertebral body of the slips is fixedly connected with the fixing hole, and the lower vertebral body of the slips is threadedly connected with the piston assembly.
根据本实用新型的一实施方式,卡瓦组件包括卡瓦、弹性片及卡瓦笼,卡瓦两端具有锚定卡齿,卡瓦笼沿轴向设有多组开口,每组开口具有至少两个口,至少两个口沿卡瓦笼轴向依次排列,卡瓦笼套设于卡瓦外,锚定卡齿露出于开口,弹性片位于卡瓦笼及卡瓦之间,其一面抵接卡瓦上两端锚定卡齿之间的外壁,另一面抵接卡瓦笼内壁。According to one embodiment of the present invention, the slip assembly includes a slip, an elastic sheet and a slip cage, the two ends of the slip have anchoring teeth, and the slip cage is provided with multiple sets of openings along the axial direction, and each set of openings has at least Two ports, at least two ports are arranged in sequence along the slip cage axial direction, the slip cage is set outside the slip cage, the anchor teeth are exposed from the opening, the elastic piece is located between the slip cage and the slip cage, and one side of it is against the slip cage. The two ends of the slips are anchored to the outer wall between the teeth, and the other side abuts against the inner wall of the slip cage.
根据本实用新型的一实施方式,活塞组件包括分隔环、活塞、活塞缸及防倒退结构,分隔环套设于环形凹槽,分隔环沿其周向设有多个过压开口,活塞缸套设于分隔环外,其一端与所胶筒组件螺纹连接,活塞一端位于活塞缸内且靠近分隔环,另一端与卡瓦下椎体螺纹连接,防倒退结构设置于活塞缸及下椎体之间,并与活塞及活塞缸连接。According to one embodiment of the utility model, the piston assembly includes a partition ring, a piston, a piston cylinder and an anti-backward structure, the partition ring is set in the annular groove, the partition ring is provided with a plurality of overpressure openings along its circumference, and the piston cylinder is sleeved in the Outside the partition ring, one end of it is threaded with the rubber cartridge assembly, one end of the piston is located in the piston cylinder and close to the partition ring, and the other end is threaded with the lower vertebral body of the slip, and the anti-backward structure is arranged between the piston cylinder and the lower vertebral body. And connected with piston and piston cylinder.
根据本实用新型的一实施方式,防倒退结构包括剪切环及内卡瓦组件,剪切环设于活塞靠近下椎体的一端,其通过剪切销钉与活塞固定连接,内卡瓦组件设于剪切环及活塞缸之间,其两端分别与剪切环及活塞缸螺纹连接。According to one embodiment of the utility model, the anti-backward structure includes a shearing ring and an inner slip assembly. The shearing ring is arranged at one end of the piston close to the lower vertebral body, and is fixedly connected to the piston through a shear pin. The inner slip assembly is provided Between the shearing ring and the piston cylinder, its two ends are threadedly connected with the shearing ring and the piston cylinder respectively.
根据本实用新型的一实施方式,内卡瓦组件包括内卡瓦及内卡瓦护套,内卡瓦护套两端分别与剪切环及活塞缸螺纹连接,其内壁具有第一卡齿,内卡瓦设于活塞及内卡瓦护套之间,其外壁设有第二卡齿,第一卡齿与第二卡齿咬合,内卡瓦内壁及活塞外壁皆设有防倒退细齿,内卡瓦及活塞通过防倒退细齿单向相对运动。According to an embodiment of the present utility model, the inner slip assembly includes an inner slip and an inner slip sheath, and the two ends of the inner slip sheath are respectively threadedly connected with the shearing ring and the piston cylinder, and the inner wall thereof has a first locking tooth, The inner slip is set between the piston and the inner slip sheath, and the outer wall is provided with a second locking tooth, the first locking tooth engages with the second locking tooth, and the inner slip and the outer wall of the piston are provided with anti-reverse fine teeth. The inner slip and the piston move relative to each other in one direction through the anti-reverse fine teeth.
根据本实用新型的一实施方式,胶筒组件包括从上至下依次套设于中心管外的胶筒支撑套、上胶筒、胶筒隔环及下胶筒,胶筒支撑套一端靠近分隔环并与活塞缸螺纹连接,上胶筒两端分别抵接胶筒支撑套及胶筒隔环,下胶筒分别抵接解封组件及胶筒隔环。According to one embodiment of the utility model, the rubber cartridge assembly includes a rubber cartridge support sleeve, an upper rubber cartridge, a rubber cartridge spacer and a lower rubber cartridge, which are sleeved outside the central tube from top to bottom, and one end of the rubber cartridge support sleeve is close to the partition The ring is threadedly connected with the piston cylinder, the two ends of the upper rubber tube abut against the rubber tube support sleeve and the rubber tube spacer ring respectively, and the lower rubber tube respectively touches the unsealing component and the rubber tube spacer ring.
根据本实用新型的一实施方式,胶筒组件还包括背圈,上胶筒及下胶筒内远离胶筒隔环的一端皆镶嵌有多层背圈,背圈其中一端呈瓣状,背圈呈瓣状的一端朝向胶筒隔环。According to an embodiment of the present utility model, the rubber cartridge assembly also includes a backing ring. The ends of the upper rubber tube and the lower rubber tube far away from the spacer ring of the rubber tube are inlaid with multi-layer backing rings. One end of the backing ring is petal-shaped, and the backing ring The petal-shaped end faces the spacer ring of the rubber cartridge.
根据本实用新型的一实施方式,解封组件包括解封环,解封环套设于中心管外,其周向设有多个解封通孔,多个解封通孔与解封孔相对,解封通孔通过剪切销钉与解封孔连接,解封环抵接胶筒组件。According to an embodiment of the present utility model, the unsealing assembly includes an unsealing ring, which is sleeved outside the central tube, and a plurality of unsealing through holes are arranged in the circumferential direction, and the plurality of unsealing through holes are opposite to the unsealing holes. The through-sealed hole is connected to the unsealed hole by a shear pin, and the unsealed ring abuts against the rubber cartridge assembly.
本实用新型通过将锚定卡瓦组件设置于胶筒组件上方,在井下压力过大上顶封隔器时,在井下压力过大,上顶封隔器时,由于锚定卡瓦组件与中心管固定连接,上顶力被上端的锚定卡瓦组件承载,极大地减小解封组件所承受的上顶力,因此无需过大的解封力来防止上顶力造成的封隔器自行解封的风险,即实现降低解封力,便于封隔器解封,从而降低井上工作设备的要求及成本。The utility model arranges the anchoring slip assembly above the rubber cylinder assembly. When the downhole pressure is too high and the packer is pushed up, due to the anchoring slip assembly and the center The pipe is fixedly connected, and the jacking force is carried by the anchor slip assembly at the upper end, which greatly reduces the jacking force on the unsealing component, so there is no need for excessive unsealing force to prevent the packer from self-sufficiency caused by the jacking force. The risk of unsealing is to reduce the unsealing force and facilitate the unsealing of the packer, thereby reducing the requirements and costs of working equipment on the well.
附图说明Description of drawings
此处所说明的附图用来提供对本申请的进一步理解,构成本申请的一部分,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。在附图中:The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:
图1为实施例中中心管结构示意图;Fig. 1 is a schematic diagram of central tube structure in the embodiment;
图2为实施例中封隔器立体结构示意图;Fig. 2 is the schematic diagram of the three-dimensional structure of the packer in the embodiment;
图3为实施例中封隔器移除卡瓦笼、活塞缸的结构示意图;Fig. 3 is the structural representation of removing the slip cage and the piston cylinder of the packer in the embodiment;
图4为实施例中封隔器纵向截面剖视图;Fig. 4 is a longitudinal sectional view of the packer in the embodiment;
图5为图4中A部放大图;Fig. 5 is an enlarged view of part A in Fig. 4;
图6为实施例中卡瓦上椎体、卡瓦及卡瓦下椎体配合结构示意图;Fig. 6 is a schematic diagram of the cooperative structure of the slip upper vertebral body, the slips and the slip lower vertebral body in the embodiment;
图7为实施例中C部放大图;Figure 7 is an enlarged view of part C in the embodiment;
图8为图4中B部放大图;Fig. 8 is an enlarged view of part B in Fig. 4;
图9为实施图8中E部放大图;Fig. 9 is an enlarged view of part E in Fig. 8;
图10为图3中a-a剖视图;Figure 10 is a sectional view of a-a in Figure 3;
图11为实施例中内卡瓦护套及内卡瓦结构示意图;Fig. 11 is a schematic diagram of the structure of the inner slip sheath and the inner slip in the embodiment;
图12为图4中D部放大图;Figure 12 is an enlarged view of part D in Figure 4;
图13为实施例中背圈结构示意图;Fig. 13 is a schematic diagram of the structure of the back ring in the embodiment;
图14为图3中沿b-b线剖视图。Fig. 14 is a sectional view along line b-b in Fig. 3 .
具体实施方式Detailed ways
以下将以图式揭露本实用新型的多个实施方式,为明确说明起见,许多实务上的细节将在以下叙述中一并说明。然而,应了解到,这些实务上的细节不应用以限制本实用新型。也就是说,在本实用新型的部分实施方式中,这些实务上的细节是非必要的。此外,为简化图式起见,一些习知惯用的结构与组件在图式中将以简单的示意的方式绘示之。A number of embodiments of the present invention will be disclosed in the following diagrams. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the invention. That is to say, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some well-known and commonly used structures and components will be shown in a simple schematic manner in the drawings.
另外,在本实用新型中如涉及“第一”、“第二”等的描述仅用于描述目的,并非特别指称次序或顺位的意思,亦非用以限定本实用新型,其仅仅是为了区别以相同技术用语描述的组件或操作而已,而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外,各个实施例之间的技术方案可以相互结合,但是必须是以本领域普通技术人员能够实现为基础,当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在,也不在本实用新型要求的保护范围之内。In addition, in the present utility model, the descriptions involving "first", "second", etc. are only for the purpose of description, and do not refer to the meaning of sequence or sequence, nor are they used to limit the present utility model, which are only for the purpose of A distinction is made between components or operations described in the same technical terms, but should not be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , also not within the scope of protection required by the utility model.
参阅图1-图4,图1为实施例中中心管结构示意图,图2为实施例中封隔器立体结构示意图,图3为实施例中封隔器移除卡瓦笼、活塞缸的结构示意图,图4为实施例中封隔器纵向截面剖视图。本例中,一种易回收的悬挂封隔器,包括中心管1、由上至下依次套设于中心管1外的锚定卡瓦组件2、活塞组件3、胶筒组件4、解封组件5及C形环6,中心管1外壁由上至下依次设有固定孔11、环形凹槽12、解封孔13及C形环安装槽14,环形凹槽12内设有传压通孔121,锚定卡瓦组件2通过固定孔11与中心管1固定连接,活塞组件3套设于环形凹槽12外且与传压通孔121连通,活塞组件3两端分别螺纹连接于锚定卡瓦组件2的另一端及胶筒组件4的一端,解封组件5通过铆入剪切销钉02以连接解封组件5及解封孔13,实现解封组件5与中心管1的固定,同时,解封组件还抵接胶筒组件4的另一端,C形环6固定安装于C形环安装槽14。Referring to Figure 1-Figure 4, Figure 1 is a schematic diagram of the structure of the center pipe in the embodiment, Figure 2 is a schematic diagram of the three-dimensional structure of the packer in the embodiment, and Figure 3 is a structure in which the slip cage and piston cylinder are removed from the packer in the embodiment Schematic diagram, Fig. 4 is a longitudinal sectional view of the packer in the embodiment. In this example, an easily recoverable suspension packer includes a central pipe 1, an anchor slip assembly 2, a piston assembly 3, a rubber cartridge assembly 4, and an unsealing Component 5 and C-shaped ring 6, the outer wall of central tube 1 is provided with fixing hole 11, annular groove 12, unsealing hole 13 and C-shaped ring installation groove 14 in sequence from top to bottom, and annular groove 12 is provided with pressure transmission channel Hole 121, the anchor slip assembly 2 is fixedly connected with the center pipe 1 through the fixing hole 11, the piston assembly 3 is sleeved outside the annular groove 12 and communicated with the pressure transmission hole 121, and the two ends of the piston assembly 3 are threadedly connected to the anchor Fix the other end of the slip assembly 2 and one end of the rubber cartridge assembly 4, and the unsealing assembly 5 connects the unsealing assembly 5 and the unsealing hole 13 by riveting the shear pin 02 to realize the fixing of the unsealing assembly 5 and the central tube 1 , at the same time, the unsealing assembly also abuts against the other end of the rubber cartridge assembly 4 , and the C-ring 6 is fixedly installed in the C-ring installation groove 14 .
坐封时,中心管1上、下端连接着油管及工具串,形成油气管柱,向管柱内加压,压力通过中心管1进入传压孔121,使得活塞组件3同时挤压锚定卡瓦组件2及胶筒组件4,使得锚定卡瓦组件2及胶筒组件4分别独立运动并发生膨胀,使得锚定卡瓦组件2咬合于管柱内壁,同时胶筒组件4亦抵接管柱内壁,即完成坐封。When setting, the upper and lower ends of the center pipe 1 are connected with oil pipes and tool strings to form an oil and gas pipe string, which is pressurized into the pipe string, and the pressure enters the pressure transmission hole 121 through the center pipe 1, so that the piston assembly 3 squeezes the anchor card at the same time The shoe component 2 and the rubber tube component 4 make the anchor slip component 2 and the rubber tube component 4 independently move and expand, so that the anchor slip component 2 bites on the inner wall of the pipe string, and the rubber tube component 4 also abuts the pipe string The inner wall, ie complete setting.
解封时,上提油管及工具串,以向上拉动中心管1,在拉力作用下,连接于解封组件5及中心管1的剪切销钉02被剪断,使得解封组件5失去支撑力并沿中心管1下滑至C形环6,此时C形环6支撑解封组件5防止解封组件5掉落,由于失去解封组件5的支撑力,锚定卡瓦组件2及胶筒组件4收缩,同时,锚定卡瓦组件2、活塞组件3及胶筒组件4共同随解封组件5下滑,即完成解封。When unsealing, lift up the oil pipe and the tool string to pull the central pipe 1 upwards. Under the action of the pulling force, the shear pin 02 connected to the unsealing assembly 5 and the central pipe 1 is cut off, so that the unsealing assembly 5 loses its support and collapses. Slide along the central tube 1 to the C-shaped ring 6. At this time, the C-shaped ring 6 supports the unsealing component 5 to prevent the unsealing component 5 from falling. Due to the loss of the support force of the unsealing component 5, the anchor slip component 2 and the rubber tube component 4 shrink, at the same time, the anchor slip assembly 2, the piston assembly 3 and the rubber tube assembly 4 slide down together with the unsealing assembly 5, and the unsealing is completed.
由于锚定卡瓦组件2设置于胶筒组件4上方,在井下压力过大,上顶封隔器时,由于锚定卡瓦组件2与中心管1固定连接,上顶力被上端的锚定卡瓦组件2承载,从而减小解封组件5所承受的上顶力,因此无需过大的解封力来防止上顶力造成的封隔器自行解封的风险,即实现降低解封力,便于封隔器解封,同时由于锚定卡瓦组件2与胶筒组件4分别设置于活塞组件3两端,坐封时由于各自独立运动的特性,各自的坐力不会被额外消耗,使之较小的坐封力即可完成封隔器的坐封,即降低外部坐封设备的要求,从而降低设备应用成本。Since the anchor slip assembly 2 is arranged above the rubber tube assembly 4, when the downhole pressure is too high and the packer is pushed up, because the anchor slip assembly 2 is fixedly connected with the center pipe 1, the upper push force is controlled by the anchoring force at the upper end. The slip assembly 2 bears the load, thereby reducing the upward force borne by the unsealing assembly 5, so there is no need for excessive unsealing force to prevent the risk of the packer self-unsealing caused by the upward force, that is, to reduce the unsealing force , to facilitate the unsealing of the packer, and because the anchor slip assembly 2 and the rubber cylinder assembly 4 are respectively arranged at both ends of the piston assembly 3, the seating force of each will not be additionally consumed due to the characteristics of independent movement during setting, The smaller setting force can complete the setting of the packer, that is, the requirement of external setting equipment is reduced, thereby reducing the cost of equipment application.
复阅图1及图4。进一步地,中心管1还设有穿孔15,穿孔15贯穿于中心管1两端,并与中心管1管道相邻设置,因此形成双通道封隔器,封隔器坐封于管柱内时,可通过穿孔15插入光纤电缆与井下的压力计或温度计连接,以探测井下压力或温度,或是通过穿孔15注入化学防腐剂,对环空作业套管进行防腐保护,进一步提高产品实用性。Review Figures 1 and 4. Furthermore, the center pipe 1 is also provided with perforations 15, which run through both ends of the center pipe 1 and are arranged adjacent to the pipe of the center pipe 1, thus forming a dual-channel packer. When the packer is set in the pipe string A fiber optic cable can be inserted through the perforation 15 to connect with a downhole pressure gauge or thermometer to detect downhole pressure or temperature, or a chemical preservative can be injected through the perforation 15 to protect the annulus casing from corrosion and further improve product practicability.
参阅图5-图6,复阅图1-图4,图5为图4中A部放大图,图6为实施例中卡瓦上椎体、卡瓦及卡瓦下椎体配合结构示意图。进一步地,沿中心管1由上至下,铆钉卡瓦组件2依次包括卡瓦上椎体21、卡瓦组件22及卡瓦下椎体23,卡瓦上椎体21与卡瓦下椎体23相对设置,卡瓦组件22两端分别抵接卡瓦椎体及卡瓦下椎体23的一端,卡瓦上椎体21另一端与固定孔11固定连接,卡瓦下椎体23与活塞组件3螺纹连接。Refer to Figures 5-6, and review Figures 1-4. Figure 5 is an enlarged view of part A in Figure 4, and Figure 6 is a schematic diagram of the cooperative structure of the slips upper vertebral body, slips and slips lower vertebral body in the embodiment. Further, along the central tube 1 from top to bottom, the rivet slip assembly 2 sequentially includes a slip upper cone 21, a slip assembly 22 and a slip lower cone 23, and the slip upper cone 21 and the slip lower cone 23 is set opposite to each other, the two ends of the slip assembly 22 respectively abut one end of the slip vertebral body and the slip lower vertebral body 23, the other end of the slip upper vertebral body 21 is fixedly connected with the fixing hole 11, and the slip lower vertebral body 23 is connected to the piston Component 3 threaded connection.
具体地,卡瓦上椎体21及卡瓦下椎体23皆具有锥面10,且卡瓦上椎体21的锥面10与卡瓦下椎体23的锥面10相对,坐封时,两个锥面10共同挤压卡瓦组件22使得卡瓦组件22膨胀以锚定在管柱内壁。Specifically, both the upper slip cone 21 and the lower slip cone 23 have a tapered surface 10, and the tapered surface 10 of the upper slip cone 21 is opposite to the tapered surface 10 of the lower slip cone 23. When setting, The two conical surfaces 10 jointly press the slip assembly 22 so that the slip assembly 22 expands to be anchored on the inner wall of the pipe string.
具体地,卡瓦组件22包括卡瓦221、弹性片222及卡瓦笼223,卡瓦221套设于所述中心管11外壁且位于卡瓦上椎体21及卡瓦下椎体23之间,卡瓦221两端具有锚定卡齿2211,卡瓦笼223沿周向设有多组开口2231,每组开口2231至少具有两个口,两个口沿卡瓦笼223轴向依次排列,卡瓦笼223套设于卡瓦221外,锚定卡齿2211露出于开口2231,弹性件222位于卡瓦笼223及卡瓦221之间,弹性片222分别抵接卡瓦笼223上开口之间的内壁及卡瓦221上锚定卡齿2211之间的外壁,具体地,于卡瓦笼223中,弹性片222是抵接在每组开口2231的两个口之间。在封隔器下入管柱进行坐封之前,由于弹性片222抵接卡瓦221,使得卡瓦221两端的卡齿2211位于开口2231内,使得封隔器进入管柱时更为顺畅。优选地,本例中,卡瓦221两端的锚定卡齿2211采用双向齿形,即卡瓦211两端的锚定卡齿2211分别朝向中心线c-c,且卡瓦221两端的锚定卡齿2211还朝背向中心管1的方向倾斜,使得坐封时封隔器可承受上顶或下压的载荷,弹性片222采用金属弹片。Specifically, the slip assembly 22 includes a slip 221, an elastic piece 222, and a slip cage 223. The slip 221 is sheathed on the outer wall of the central tube 11 and is located between the upper slip 21 and the lower slip 23. , the two ends of the slip 221 have anchoring teeth 2211, and the slip cage 223 is provided with multiple groups of openings 2231 along the circumferential direction, and each group of openings 2231 has at least two openings, and the two openings are arranged in sequence along the axial direction of the slip cage 223. The cage 223 is sleeved outside the slips 221, the anchor teeth 2211 are exposed in the opening 2231, the elastic piece 222 is located between the slip cage 223 and the slips 221, and the elastic pieces 222 abut against the upper openings of the slip cage 223 respectively. The inner wall and the outer wall between the anchoring teeth 2211 on the slips 221 , specifically, in the slip cage 223 , the elastic piece 222 abuts between two openings of each set of openings 2231 . Before the packer is lowered into the pipe string for setting, since the elastic piece 222 abuts against the slips 221, the teeth 2211 at both ends of the slips 221 are located in the opening 2231, so that the packer enters the pipe string more smoothly. Preferably, in this example, the anchoring teeth 2211 at both ends of the slip 221 adopt a two-way tooth shape, that is, the anchoring teeth 2211 at both ends of the slip 211 face the center line c-c respectively, and the anchoring teeth 2211 at both ends of the slip 221 It is also inclined towards the direction away from the central pipe 1, so that the packer can bear the load of pushing up or down when setting, and the elastic sheet 222 is a metal elastic sheet.
进一步地,卡瓦221两端背向锚定卡齿2211的一面设有挤压斜面2212,安装时卡瓦221两端的挤压斜面2212分别与卡瓦上椎体21及卡瓦下椎体23的锥面10贴合,当坐封时,卡瓦上椎体21及卡瓦下椎体23的锥面10共同挤压卡瓦221两端的挤压斜面2212,使得卡瓦221径向膨胀并压缩弹性片222,同时使得卡瓦221两端的锚定卡齿2211于开口2231顶出并咬合于管柱内壁。Further, the sides of the slips 221 facing away from the anchoring teeth 2211 are provided with extrusion slopes 2212, and the extrusion slopes 2212 at both ends of the slips 221 are respectively connected to the slip upper vertebral body 21 and the slip lower vertebral body 23 during installation. When setting, the cones 10 of the upper slip 21 and the lower taper 23 of the slips jointly squeeze the extrusion slopes 2212 at both ends of the slips 221, so that the slips 221 expand radially and The elastic piece 222 is compressed, and at the same time, the anchoring teeth 2211 at both ends of the slip 221 are pushed out of the opening 2231 and engaged with the inner wall of the pipe string.
参阅图7,复阅图1-图4,图7为实施例中C部放大图。进一步地,活塞组件3包括分隔环31、活塞32、活塞缸33及防倒退结构34,分隔环31套设于环形凹槽12,分隔环31沿周向设有多个过压开口311,分隔环31内壁与环形凹槽12底部形成第一活塞腔122,活塞缸33套设于分隔环31外,分隔环31外壁与活塞缸33内壁形成第二活塞腔123,过压孔121与第一活塞腔122连通,第二活塞腔123通过过压开口311与第一活塞腔122连通,活塞缸33一端与胶筒组件4螺纹连接,活塞32一端位于活塞缸33内且靠近分隔环31,另一端与卡瓦下椎体23螺纹连接,防倒退结构34设置于活塞缸33及卡瓦下椎体23之间,并与活塞32及活塞缸33连接。Referring to Fig. 7, review Fig. 1-Fig. 4, Fig. 7 is an enlarged view of part C in the embodiment. Further, the piston assembly 3 includes a partition ring 31, a piston 32, a piston cylinder 33 and an anti-reverse structure 34. The partition ring 31 is sleeved in the annular groove 12. The partition ring 31 is provided with a plurality of overpressure openings 311 along the circumference. The partition ring 31 The inner wall and the bottom of the annular groove 12 form a first piston chamber 122, the piston cylinder 33 is sleeved outside the partition ring 31, the outer wall of the partition ring 31 and the inner wall of the piston cylinder 33 form a second piston chamber 123, the overpressure hole 121 and the first piston chamber 122, the second piston chamber 123 communicates with the first piston chamber 122 through the overpressure opening 311, one end of the piston cylinder 33 is threadedly connected with the rubber cartridge assembly 4, one end of the piston 32 is located in the piston cylinder 33 and is close to the separator ring 31, and the other end is connected to the The slip lower vertebral body 23 is threaded, and the anti-backward structure 34 is arranged between the piston cylinder 33 and the slip lower vertebral body 23 , and is connected with the piston 32 and the piston cylinder 33 .
坐封时,压力首先由中心管1的管道经传压孔121进入并填充至第一活塞腔122,随后经多个过压开口311进入至第二活塞腔123,并于第二活塞腔123内分别朝不同方向推动活塞组件3及胶筒组件4,于活塞组件3中,在第活塞腔123内压力的推动下,活塞32朝上运动,进而使得活塞32挤压卡瓦下椎体23,使得卡瓦下椎体23向上运动并推动卡瓦22向上运动,此时卡瓦上椎体21及卡瓦下椎体23的锥面10共同挤压卡瓦22两端的挤压斜面,使得卡瓦221径向膨胀并压缩弹性片222,同时使得卡瓦221两端的锚定卡齿2211于开口2231顶出并咬合于管柱内壁。于胶筒组件4中,由于活塞缸33与胶筒组件4螺纹连接,在第二活塞腔123的压力作用下,胶筒组件4向下运动,此时胶筒组件4则拉动活塞缸33共同向下运动,进而使得活塞缸33拉动防倒退结构34向下运动,使防倒退结构34对活塞32及活塞缸33进行限位,防止泄压后卡瓦或胶筒回弹而无法达到封隔作用。When setting, the pressure first enters from the pipeline of the central pipe 1 through the pressure transmission hole 121 and fills the first piston chamber 122, then enters the second piston chamber 123 through a plurality of overpressure openings 311, and is released in the second piston chamber 123. Push the piston assembly 3 and the rubber cartridge assembly 4 in different directions. In the piston assembly 3, under the push of the pressure in the second piston chamber 123, the piston 32 moves upwards, and then the piston 32 squeezes the slip lower cone 23, Make the lower slips vertebral body 23 move upwards and push the slips 22 upwards. At this time, the taper surfaces 10 of the slips upper vertebral body 21 and the slips lower vertebral body 23 jointly squeeze the extrusion slopes at both ends of the slips 22, so that the slips The shoe 221 radially expands and compresses the elastic piece 222 , and at the same time, the anchoring teeth 2211 at both ends of the slip 221 push out through the opening 2231 and engage with the inner wall of the pipe string. In the rubber cartridge assembly 4, since the piston cylinder 33 is threadedly connected with the rubber cartridge assembly 4, under the pressure of the second piston chamber 123, the rubber cartridge assembly 4 moves downward, and at this time, the rubber cartridge assembly 4 pulls the piston cylinder 33 together. The downward movement makes the piston cylinder 33 pull the anti-backward structure 34 to move downward, so that the anti-backward structure 34 can limit the position of the piston 32 and the piston cylinder 33, preventing the slips or the rubber tube from rebounding after the pressure release and unable to achieve the seal effect.
优选地,活塞32位于活塞缸33内的一端采用密封环进行密封。Preferably, one end of the piston 32 located in the piston cylinder 33 is sealed with a sealing ring.
参阅图8-图11,复阅图1-图4,图8为图4中B部放大图,图9为实施图8中E部放大图,图10为图3中a-a剖视图,图11为实施例中内卡瓦护套及内卡瓦结构示意图。更进一步地,防倒退结构34包括剪切环341及内卡瓦组件342,剪切环341设于活塞32靠近下椎体23的一端,剪切环341通过剪切销钉与活塞32通过坐封剪切销钉01固定连接,内卡瓦组件34设于剪切环341及活塞缸33之间,内卡瓦组件34两端分别与剪切环341及活塞缸33螺纹连接。Referring to Figures 8-11, review Figures 1-4, Figure 8 is an enlarged view of Part B in Figure 4, Figure 9 is an enlarged view of Part E in Figure 8, Figure 10 is a sectional view of a-a in Figure 3, and Figure 11 is Schematic diagram of inner slip sheath and inner slip structure in the embodiment. Furthermore, the anti-backward structure 34 includes a shearing ring 341 and an inner slip assembly 342. The shearing ring 341 is arranged at the end of the piston 32 close to the lower vertebral body 23. The shearing ring 341 is set with the piston 32 through the shearing pin. The shear pin 01 is fixedly connected, the inner slip assembly 34 is arranged between the shear ring 341 and the piston cylinder 33 , and the two ends of the inner slip assembly 34 are threadedly connected with the shear ring 341 and the piston cylinder 33 respectively.
更进一步地,内卡瓦组件342包括内卡瓦3421及内卡瓦护套3422,内卡瓦护套3422两端分别与剪切环341及活塞缸33螺纹连接,内卡瓦护套3422内壁具有第一卡齿34221,内卡瓦3421设于活塞32及内卡瓦护套3422之间,内卡瓦3421外壁设有第二卡齿34211,第一卡齿34221与第二卡齿34211咬合,内卡瓦3421内壁及活塞32外壁皆设有防倒退细齿20。坐封时,当第二活塞腔123的压力分别推动活塞32及胶筒组件4时,活塞32及胶筒组件4分别朝相反方向运动,同时,在胶筒组件4的牵引下,活塞缸33带动内卡瓦护套3422运动,而内卡瓦护套3422则带动剪切环341运动,使得连接剪切环341及活塞32的坐封剪切螺01钉被剪断,同时,内卡瓦护套3422还带动内卡瓦3421与活塞32相对运动,运动过程中,由于内卡瓦3421内壁及活塞32外壁的防倒退细齿20为单向,因此在运动过程中,内卡瓦3421及活塞32上的防倒退细齿20相互咬合,使得内卡瓦3421及活塞32无法发生反向的相对运动,进而防止泄压后卡瓦或胶筒回弹而无法达到封隔作用。优选地,内卡瓦组件342安装时铆入防转动销钉03以连接内卡瓦3421及内卡瓦护套3422,防止内卡瓦3421及内卡瓦护套3422之间发生相对转动。Furthermore, the inner slip assembly 342 includes an inner slip 3421 and an inner slip sheath 3422. It has a first locking tooth 34221, the inner slip 3421 is set between the piston 32 and the inner slip sheath 3422, the outer wall of the inner slip 3421 is provided with a second locking tooth 34211, and the first locking tooth 34221 and the second locking tooth 34211 are engaged , the inner wall of the inner slip 3421 and the outer wall of the piston 32 are provided with anti-backward serrations 20 . When setting, when the pressure of the second piston chamber 123 pushes the piston 32 and the rubber cartridge assembly 4 respectively, the piston 32 and the rubber cartridge assembly 4 move in opposite directions respectively, and at the same time, under the traction of the rubber cartridge assembly 4, the piston cylinder 33 Drive the inner slip sheath 3422 to move, and the inner slip sheath 3422 drives the shear ring 341 to move, so that the setting shear screw 01 connecting the shear ring 341 and the piston 32 is cut, and at the same time, the inner slip sheath The sleeve 3422 also drives the inner slip 3421 and the piston 32 to move relative to each other. During the movement, since the anti-backward teeth 20 on the inner wall of the inner slip 3421 and the outer wall of the piston 32 are unidirectional, the inner slip 3421 and the piston The anti-backward fine teeth 20 on the 32 mesh with each other, so that the inner slip 3421 and the piston 32 cannot move in the opposite direction, thereby preventing the slips or the rubber tube from rebounding after the pressure is released, so that the sealing effect cannot be achieved. Preferably, when the inner slip assembly 342 is installed, the anti-rotation pin 03 is riveted to connect the inner slip 3421 and the inner slip sheath 3422 to prevent relative rotation between the inner slip 3421 and the inner slip sheath 3422 .
参阅图12-图13,复阅图1-图4,图12为图4中D部放大图,图13为实施例中背圈结构示意图。进一步地,胶筒组件4包括沿中心管1从上至下依次包括胶筒支撑套41、上胶筒42、胶筒隔环43及下胶筒44,胶筒支撑套41一端位于活塞缸33内并与活塞缸33螺纹连接,上胶筒42两端分别抵接胶筒支撑套41及胶筒隔环43,下胶筒44分别抵接解封组件5及胶筒隔环43。在第二活塞腔123内压力推动下,胶筒支撑套41挤压上胶筒42,使得上胶筒42向下挤压,由于解封组件5处于固定状态,使得上胶筒42、胶筒隔环43及下胶筒44之间相互挤压,从而使上胶筒42及下胶筒44发生径向膨胀实现封隔。Refer to Figures 12-13, and review Figures 1-4. Figure 12 is an enlarged view of part D in Figure 4, and Figure 13 is a schematic diagram of the structure of the back ring in the embodiment. Further, the rubber cartridge assembly 4 includes a rubber cartridge support sleeve 41 , an upper rubber cartridge 42 , a rubber cartridge spacer 43 and a lower rubber cartridge 44 along the central tube 1 from top to bottom. One end of the rubber cartridge support sleeve 41 is located at the piston cylinder 33 The two ends of the upper rubber tube 42 abut against the rubber tube supporting sleeve 41 and the rubber tube spacer ring 43 respectively, and the lower rubber tube 44 respectively touch the unsealing component 5 and the rubber tube spacer ring 43 . Pushed by the pressure in the second piston chamber 123, the rubber sleeve support sleeve 41 squeezes the upper rubber sleeve 42, so that the upper rubber sleeve 42 is pushed downward, and since the unsealing assembly 5 is in a fixed state, the upper rubber sleeve 42, the rubber sleeve The spacer ring 43 and the lower rubber tube 44 are squeezed against each other, so that the upper rubber tube 42 and the lower rubber tube 44 expand radially to realize sealing.
优选地,胶筒支撑套41位于活塞缸33内的一端亦采用密封环进行密封。Preferably, the end of the rubber support sleeve 41 located in the piston cylinder 33 is also sealed with a sealing ring.
优选地,胶筒组件4还包括背圈45,上胶筒42及下胶筒44内远离胶筒隔环43的一端皆镶嵌多层背圈45,背圈45的其中一端呈瓣状,且背圈45呈瓣状的一端朝向胶筒隔环43,多层背圈45的瓣状结构相互错位。通过采用将背圈45镶嵌至上胶筒41及下胶筒44内部,在封隔器入井时,上胶筒42及下胶筒44外部没有多余的挡圈或背圈,在封隔器遇到杂质较多的井筒时仍能顺利通过,当坐封时,上胶筒42及下胶筒44受到挤压而膨胀,由于背圈45一端为瓣状,镶嵌在上胶筒42及下胶筒44内部的背圈45则会被撑开,从而分别包覆上胶筒42及下胶筒44,使上胶筒42及下胶筒44在受高温高压时密封时间更长,以进一步提高封隔的可靠性。Preferably, the rubber cartridge assembly 4 also includes a backing ring 45. The ends of the upper rubber cartridge 42 and the lower rubber cartridge 44 away from the rubber cartridge spacer 43 are inlaid with multi-layer backing rings 45. One end of the backing ring 45 is petal-shaped, and One petal-shaped end of the backing ring 45 faces the rubber tube spacer 43 , and the petal-shaped structures of the multi-layer backing ring 45 are misaligned with each other. By inserting the backing ring 45 into the inside of the upper rubber sleeve 41 and the lower rubber sleeve 44, when the packer goes into the well, there is no redundant retaining ring or backing ring outside the upper rubber sleeve 42 and the lower rubber sleeve 44. The wellbore with a lot of impurities can still pass through smoothly. When the seal is set, the upper rubber sleeve 42 and the lower rubber sleeve 44 are squeezed and expanded. Because the back ring 45 is petal-shaped, it is embedded in the upper rubber sleeve 42 and the lower rubber sleeve The back ring 45 inside the 44 will be stretched to cover the upper rubber tube 42 and the lower rubber tube 44 respectively, so that the sealing time of the upper rubber tube 42 and the lower rubber tube 44 will be longer when subjected to high temperature and high pressure, so as to further improve the sealing effect. interval reliability.
参阅图14,图14为图3中沿b-b线剖视图。进一步地,解封组件5包括解封环51,解封环51套设于中心管1外,沿解封环51周向均匀设有多个解封通孔511,多个解封通孔511与解封孔13相对,安装时通过铆入解封剪切销钉02以连接解封通孔511及解封孔13实现解封环51的固定。Referring to FIG. 14 , FIG. 14 is a cross-sectional view along line b-b in FIG. 3 . Further, the unsealing assembly 5 includes an unsealing ring 51, the unsealing ring 51 is sheathed outside the central tube 1, and a plurality of unsealing through-holes 511 are uniformly arranged along the circumference of the unsealing ring 51, and the plurality of unsealing through-holes 511 Opposite to the unsealing hole 13 , the unsealing ring 51 is fixed by riveting in the unsealing shear pin 02 to connect the unsealing through hole 511 and the unsealing hole 13 during installation.
解封时,上提油管工具串,连接解封通孔511及解封孔13的解封剪切销钉02被剪断。此时,解封环51滑落至中心管1上的C形环6并被C形环6所承载,胶筒组件4失去解封环51的支撑,开始收缩并随着解封环51一起滑落,安装在中心管上的零件,由于卡瓦上椎体21通过固定孔11固定于中心管1,分隔环31通过环形凹槽12固定于中心管1,因此除分隔环31及卡瓦上锥体21外,其余全部随着中心管1的上提而滑落,上胶筒42、下胶筒44及卡瓦221收缩至原状,封隔器实现解封并提出井口。由于锚定卡瓦组件2设置于胶筒组件4上方,在井下压力过大上顶封隔器时,上顶力均被上端的锚定卡瓦组件2承载而无作用在中心管1上,因此可减少解封通孔511与解封孔13连接的剪切钉,从而减小解封力,便于封隔器解封。When unsealing, the oil pipe tool string is lifted up, and the unsealing shear pin 02 connecting the unsealing through hole 511 and the unsealing hole 13 is cut off. At this time, the unsealing ring 51 slides down to the C-shaped ring 6 on the central tube 1 and is carried by the C-shaped ring 6, the rubber cartridge assembly 4 loses the support of the unsealing ring 51, starts to shrink and slides down together with the unsealing ring 51 , the parts installed on the center tube, since the slip upper cone 21 is fixed to the center tube 1 through the fixing hole 11, and the partition ring 31 is fixed to the center tube 1 through the annular groove 12, so except for the partition ring 31 and the slip upper cone Outside the body 21, the rest all slide down with the lifting of the center pipe 1, the upper rubber sleeve 42, the lower rubber sleeve 44 and the slips 221 shrink to their original shape, the packer is unsealed and the wellhead is lifted out. Since the anchor slip assembly 2 is arranged above the rubber cartridge assembly 4, when the downhole pressure is too high and the packer is pushed up, the upper jacking force is carried by the anchor slip assembly 2 at the upper end and does not act on the central pipe 1. Therefore, the number of shear nails connecting the unsealing through hole 511 and the unsealing hole 13 can be reduced, thereby reducing the unsealing force and facilitating the unsealing of the packer.
综上,坐封时,封隔器上、下端连接着油管及工具串,形成油气管柱。向管柱内加压,压力通过中心管上的传压孔依次传到第一活塞腔及第二活塞腔里。当压力达到一定值后,连接剪切环及活塞的坐封剪切销钉被剪断,活塞向上移动,同进,胶筒支撑套向下移动,活塞继续移动并推动连接在活塞上的卡瓦下锥体,从而推动卡瓦,卡瓦径向胀开并同时推动卡瓦笼移动,此时,卡瓦挤压斜面与卡瓦上锥体、卡瓦下锥体的锥面贴紧,卡齿咬住管柱实现锚定。To sum up, when setting, the upper and lower ends of the packer are connected with tubing and tool strings to form an oil and gas tubing string. Pressurize the pipe string, and the pressure is transmitted to the first piston chamber and the second piston chamber in turn through the pressure transmission hole on the central tube. When the pressure reaches a certain value, the setting shear pin connecting the shearing ring and the piston is sheared, the piston moves upwards, and the rubber tube support sleeve moves downwards, and the piston continues to move and pushes the slips connected to the piston down. Cone, so as to push the slips, the slips expand radially and push the slip cage to move at the same time, at this time, the slip extrusion slope is in close contact with the taper surfaces of the upper slip cone and the lower slip cone, and the snap teeth Bite the pipe string to achieve anchoring.
由于中心管传压孔在卡瓦组件与胶筒组件之间,所以在坐封卡瓦的同时也在坐封上胶筒、下胶筒。胶筒支撑套向下移动时,带动活塞缸、内卡瓦护套、内卡瓦、剪切环向右移动,在达到最小坐封压力后,上胶筒及下胶筒被挤胀,从而密封套管,嵌入在上胶筒及下胶筒的背圈也随着上胶筒及下胶筒胶筒挤胀而被撑开,从而保护的胶筒。由于封隔器上的活塞与内卡瓦在坐封过程中是相对移动的,所以在完成坐封后,内卡瓦上的防倒退细齿与活塞上的防倒退细齿交错咬合,在完成坐封泄压后,上胶筒及下胶筒无法回弹,避免了泄压后胶筒回弹而无法起到封隔的作用,形成永久坐封。完成封隔器坐封后可通过穿孔下入光纤电缆与井下的压力计及温度计连接,以探测井下压力或温度,或是通过穿孔注入化学防腐剂对套管进行防护。Since the pressure transmission hole of the central pipe is between the slip assembly and the rubber cartridge assembly, the upper and lower rubber cartridges are also set while the slips are being set. When the rubber sleeve support sleeve moves downward, it drives the piston cylinder, inner slip sheath, inner slip, and shear ring to move to the right. After reaching the minimum setting pressure, the upper rubber sleeve and the lower rubber sleeve are squeezed, thereby The sealing sleeve, the back ring embedded in the upper rubber tube and the lower rubber tube is also stretched out with the expansion of the upper rubber tube and the lower rubber tube, so as to protect the rubber tube. Since the piston on the packer and the inner slips move relatively during the setting process, after the setting is completed, the anti-retrogression serrations on the inner slips and the anti-retrogression serrations on the piston interlock. After the pressure is released from the setting seal, the upper and lower rubber sleeves cannot rebound, which prevents the rubber sleeve from rebounding after the pressure release and cannot play the role of sealing, forming a permanent setting seal. After the packer is set, the fiber optic cable can be drilled through the hole to connect with the downhole pressure gauge and thermometer to detect the downhole pressure or temperature, or inject chemical preservatives through the hole to protect the casing.
解封时,上提油管工具串,连接解封通孔及解封孔的解封剪切销钉被剪断。此时,解封环滑落至中心管上的C形环并被C形环所承载,胶筒组件失去解封环的支撑,开始收缩并随着解封环一起滑落,安装在中心管上的零件,除分隔环及卡瓦上锥体外,其余全部随着中心管的上提而滑落,上胶筒、下胶筒及卡瓦收缩至原状,封隔器实现解封并提出井口。When unsealing, the oil pipe tool string is lifted up, and the unsealing shear pins connecting the unsealing through hole and the unsealing hole are cut off. At this time, the unsealing ring slides down to the C-shaped ring on the central tube and is carried by the C-shaped ring. The rubber cartridge assembly loses the support of the unsealing ring, begins to shrink and slides down together with the unsealing ring, and is installed on the central tube. Except for the separation ring and the upper slip cone, all the parts slide down with the lifting of the center pipe, the upper rubber sleeve, lower rubber sleeve and slips shrink to their original shape, and the packer is unsealed and lifted out of the wellhead.
本例中通过将锚定卡瓦组件设置于胶筒组件上方,在井下压力过大上顶封隔器时,在井下压力过大,上顶封隔器时,由于锚定卡瓦组件与中心管固定连接,上顶力被上端的锚定卡瓦组件承载,极大地减小解封组件所承受的上顶力,因此无需过大的解封力来防止上顶力造成的封隔器自行解封的风险,即实现降低解封力,便于封隔器解封,从而降低井上工作设备的要求及成本。In this example, by setting the anchor slip assembly above the rubber cartridge assembly, when the downhole pressure is too high and the packer is pushed up, due to the anchor slip assembly and the center The pipe is fixedly connected, and the jacking force is carried by the anchor slip assembly at the upper end, which greatly reduces the jacking force on the unsealing component, so there is no need for excessive unsealing force to prevent the packer from self-sufficiency caused by the jacking force. The risk of unsealing is to reduce the unsealing force and facilitate the unsealing of the packer, thereby reducing the requirements and costs of working equipment on the well.
上所述仅为本实用新型的实施方式而已,并不用于限制本实用新型。对于本领域技术人员来说,本实用新型可以有各种更改和变化。凡在本实用新型的精神和原理的内所作的任何修改、等同替换、改进等,均应包括在本实用新型的权利要求范围之内。The above is only the embodiment of the present utility model, and is not intended to limit the present utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the scope of claims of the present utility model.
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