技术领域technical field
本实用新型涉及压裂装置技术领域，是一种压裂用桥塞。The utility model relates to the technical field of fracturing devices, in particular to a bridge plug for fracturing.
背景技术Background technique
桥塞-射孔连作分段压裂技术是进行非常规油气藏开发的主要技术之一，该技术因其不受分段压裂层数限制、工具管柱简单、不易造成砂卡、桥塞钻铣完成后保证了井筒的畅通便于后续工艺管柱下入等优点，在国外得到广泛应用，目前所用桥塞在用于水平井压裂施工后需要进行钻除作业，延长了完井时间，再者由于水平井特殊的井深结构，在钻桥塞时可能发生卡钻等问题，给施工带来风险。Bridge plug-perforation continuous staged fracturing technology is one of the main technologies for the development of unconventional oil and gas reservoirs. Because this technology is not limited by the number of staged fracturing layers, the tool string is simple, and it is not easy to cause sand sticking and bridge plugging. After the completion of drilling and milling, it ensures the smooth flow of the wellbore and facilitates the entry of subsequent process strings. It has been widely used abroad. At present, the bridge plugs used in horizontal wells need to be drilled and removed after fracturing construction, which prolongs the completion time. Furthermore, due to the special well depth structure of horizontal wells, problems such as pipe sticking may occur when drilling bridge plugs, which brings risks to construction.
发明内容Contents of the invention
本实用新型提供了一种压裂用桥塞，克服了上述现有技术之不足，其能有效解决前所用桥塞在用于水平井压裂施工后需要进行钻除作业，延长了完井时间，并且施工有风险的问题。The utility model provides a bridge plug for fracturing, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problem that the previously used bridge plug needs to be drilled and removed after the horizontal well fracturing construction, prolonging the completion time , and there are risks in construction.
本实用新型的技术方案是通过以下措施来实现的：一种压裂用桥塞，包括座封工具中心拉杆、推进套、锥筒、双向倒齿环、卡瓦和套筒；座封工具中心拉杆呈中空的管状结构，推进套的下部外壁上一体固定有限位环台，推进套套装在座封工具中心拉杆的下部外壁上，对应限位环台的推进套与座封工具中心拉杆之间沿圆周安装有至少一个的下剪钉，在限位环台上方的推进套外壁上设置有齿尖朝下的倒齿，在推进套上方的座封工具中心拉杆上沿圆周通过至少一个的上剪钉固定安装有锥筒，锥筒的外壁呈上窄下宽的锥面，锥筒的下端一体固定有上宽下窄的锥环，锥环套装在限位环台上方的推进套上，在锥环的内壁上设置有齿尖朝下的倒齿，在推进套与锥环之间安装有双向倒齿环，双向倒齿环的内壁上设置有与推进套外壁上的倒齿相配的齿尖朝上的倒齿，双向倒齿环的外壁上设置有与锥环内壁上的倒齿相配的齿尖朝上的倒齿，在限位环台的上端与锥环外壁之间安装有卡瓦，卡瓦的上部沿圆周设置有轴向的割缝；在座封工具中心拉杆上套装有套筒，套筒的下端一体固定有当锥筒沿座封工具中心拉杆上移后能够膨胀的膨胀环，膨胀环套装在锥筒的上部外壁上，在膨胀环的外壁上固定安装有胶筒。The technical scheme of the utility model is achieved through the following measures: a bridge plug for fracturing, including a seat seal tool center pull rod, a pusher sleeve, a cone, a two-way inverted tooth ring, slips and a sleeve; a seat seal tool center The pull rod is a hollow tubular structure, and the limit ring platform is integrally fixed on the lower outer wall of the push sleeve, and the push sleeve is set on the lower outer wall of the center pull rod of the seat seal tool. At least one lower shear nail is installed on the circumference, and the outer wall of the push sleeve above the limit ring platform is provided with inverted teeth with the tip facing downward, and at least one upper shear nail passes along the circumference of the center rod of the sealing tool above the push sleeve. The nail is fixed with a cone tube, the outer wall of the cone tube is a conical surface with a narrow top and a wide bottom. The lower end of the cone tube is integrally fixed with a cone ring with a wide top and a narrow bottom. The inner wall of the cone ring is provided with inverted teeth with tooth tips facing downwards, and a two-way inverted tooth ring is installed between the push sleeve and the cone ring. The inverted tooth with the tip pointing up, the outer wall of the two-way inverted gear ring is provided with the inverted tooth with the tip facing up that matches the inverted tooth on the inner wall of the cone ring, and a clip is installed between the upper end of the limit ring platform and the outer wall of the cone ring. Sleeve, the upper part of the slip is provided with an axial slot along the circumference; a sleeve is set on the center rod of the seat seal tool, and the lower end of the sleeve is integrally fixed with a swell that can expand when the cone moves up along the center rod of the seat seal tool. The expansion ring is set on the upper outer wall of the cone, and the rubber tube is fixedly installed on the outer wall of the expansion ring.
下面是对上述实用新型技术方案的进一步优化或/和改进：Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:
上述卡瓦的下端与限位环台的上端之间通过键槽安装在一起。The lower end of the above-mentioned slips and the upper end of the limit ring platform are installed together through a keyway.
上述膨胀环的壁厚为1.25mm。The above-mentioned expansion ring has a wall thickness of 1.25 mm.
上述对应限位环台的推进套与座封工具中心拉杆之间沿圆周均匀固定安装有三个下剪钉。Three lower shear nails are evenly fixed and installed along the circumference between the push sleeve corresponding to the limit ring platform and the central pull rod of the seat seal tool.
上述在推进套上方的座封工具中心拉杆与锥筒之间沿圆周均匀固定安装有三个上剪钉。Three upper shear pins are evenly and fixedly installed along the circumference between the central pull rod of the seat seal tool above the push sleeve and the cone.
本实用新型结构合理而紧凑，使用方便，可靠性高，在压裂作业后无需进行钻除作业即可直接投产，从而节约完井时间，卡瓦与套管的接触面积大，可以有效防止本实用新型移动，降低施工风险，保证低渗透油气田的高效。The utility model has a reasonable and compact structure, is convenient to use, and has high reliability. After the fracturing operation, it can be directly put into production without drilling and removing operations, thereby saving the completion time. The contact area between the slips and the casing is large, which can effectively prevent the The utility model moves, reduces construction risks, and ensures high efficiency in low-permeability oil and gas fields.
附图说明Description of drawings
附图1为本实用新型最佳实施例的主视半剖视结构示意图。Accompanying drawing 1 is the front view semi-sectional structure schematic diagram of the preferred embodiment of the present invention.
附图中的编码分别为：1为座封工具中心拉杆，2为推进套，3为限位环台，4为下剪钉，5为上剪钉，6为锥筒，7为锥环，8为双向倒齿环，9为卡瓦，10为割缝，11为套筒，12为膨胀环，13为胶筒，14为座封工具外筒。The codes in the accompanying drawings are: 1 is the center rod of the seat seal tool, 2 is the push sleeve, 3 is the limit ring platform, 4 is the lower shear nail, 5 is the upper shear nail, 6 is the cone cylinder, 7 is the cone ring, 8 is a two-way inverted gear ring, 9 is a slip, 10 is a slit, 11 is a sleeve, 12 is an expansion ring, 13 is a rubber tube, and 14 is an outer cylinder of a seat seal tool.
具体实施方式Detailed ways
本实用新型不受下述实施例的限制，可根据本实用新型的技术方案与实际情况来确定具体的实施方式。The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.
在本实用新型中，为了便于描述，各部件的相对位置关系的描述均是根据说明书附图1的布图方式来进行描述的，如：上、下、左、右等的位置关系是依据说明书附图的布图方向来确定的。In this utility model, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout method of the accompanying drawing 1 of the specification, such as: the positional relationship of upper, lower, left, right, etc. is based on the specification It is determined by the layout direction of the attached drawing.
下面结合实施例及附图对本实用新型作进一步描述：Below in conjunction with embodiment and accompanying drawing, the utility model is further described:
如附图1所示，该压裂用桥塞包括座封工具中心拉杆1、推进套2、锥筒6、双向倒齿环8、卡瓦9和套筒11；座封工具中心拉杆1呈中空的管状结构，推进套2的下部外壁上一体固定有限位环台3，推进套2套装在座封工具中心拉杆1的下部外壁上，对应限位环台3的推进套2与座封工具中心拉杆1之间沿圆周安装有至少一个的下剪钉4，在限位环台3上方的推进套2外壁上设置有齿尖朝下的倒齿，在推进套2上方的座封工具中心拉杆1上沿圆周通过至少一个的上剪钉5固定安装有锥筒6，锥筒6的外壁呈上窄下宽的锥面，锥筒6的下端一体固定有上宽下窄的锥环7，锥环7套装在限位环台3上方的推进套2上，在锥环7的内壁上设置有齿尖朝下的倒齿，在推进套2与锥环7之间安装有双向倒齿环8，双向倒齿环8的内壁上设置有与推进套2外壁上的倒齿相配的齿尖朝上的倒齿，双向倒齿环8的外壁上设置有与锥环7内壁上的倒齿相配的齿尖朝上的倒齿，在限位环台3的上端与锥环7外壁之间安装有卡瓦9，卡瓦9的上部沿圆周设置有轴向的割缝10；在座封工具中心拉杆1上套装有套筒11，套筒11的下端一体固定有当锥筒6沿座封工具中心拉杆1上移后能够膨胀的膨胀环12，膨胀环12套装在锥筒6的上部外壁上，在膨胀环12的外壁上固定安装有胶筒13。As shown in Figure 1, the bridge plug for fracturing includes a center rod 1 of the setting tool, a pusher sleeve 2, a cone 6, a bidirectional inverted tooth ring 8, slips 9 and a sleeve 11; the center rod 1 of the setting tool is Hollow tubular structure, the limit ring platform 3 is integrally fixed on the lower outer wall of the push sleeve 2, and the push sleeve 2 is set on the lower outer wall of the center pull rod 1 of the seat seal tool, corresponding to the push sleeve 2 of the limit ring platform 3 and the center of the seat seal tool At least one lower shear nail 4 is installed along the circumference between the pull rods 1, and the outer wall of the push sleeve 2 above the limit ring platform 3 is provided with inverted teeth with the tooth tip facing downward, and the central pull rod of the seat seal tool above the push sleeve 2 1. A cone cylinder 6 is fixedly installed along the circumference through at least one upper shear nail 5. The outer wall of the cone cylinder 6 is a conical surface with a narrow top and a wide bottom. The lower end of the cone cylinder 6 is integrally fixed with a cone ring 7 with a wide top and a narrow bottom. The cone ring 7 is set on the pusher sleeve 2 above the limit ring platform 3, and the inner wall of the cone ring 7 is provided with downward-facing inverted teeth, and a two-way inverted gear ring is installed between the pusher sleeve 2 and the cone ring 7 8. The inner wall of the two-way inverted gear ring 8 is provided with inverted teeth that match the inverted teeth on the outer wall of the pusher sleeve 2, and the outer wall of the two-way inverted gear ring 8 is provided with inverted teeth on the inner wall of the cone ring 7. Matching inverted teeth with tooth tips facing upward, slips 9 are installed between the upper end of the limit ring platform 3 and the outer wall of the cone ring 7, and the upper part of the slips 9 is provided with axial slots 10 along the circumference; A sleeve 11 is set on the center rod 1, and the lower end of the sleeve 11 is integrally fixed with an expansion ring 12 that can expand when the cone 6 moves up along the center rod 1 of the seat seal tool. The expansion ring 12 is sleeved on the upper outer wall of the cone 6 On the outer wall of the expansion ring 12, a rubber sleeve 13 is fixedly installed.
本实用新型与座封工具连接一起入井，在套筒11上方的座封工具中心拉杆1上安装座封工具外筒14，并且座封工具外筒14的下端与套筒11的上端相抵；在座封工具和本实用新型下到井底预定位置后，通过电缆点火或油管连接加压引燃座封工具内的慢燃火药,燃烧室内产生的高压气体产生的推力由座封工具外筒14施加给套筒11，拉力由座封工具中心拉杆1施加给上剪钉5和下剪钉4，当拉力达到一定数值时，上剪钉5被剪断，座封工具中心拉杆1通过下剪钉4拉动推进套2向上运动，推进套2推动卡瓦9沿锥环7的锥面向上移动爬坡，由于割缝10的存在，当卡瓦9沿锥环7向上移动后，卡瓦9膨胀，最终完成卡瓦9坐挂；与此同时套筒11在座封工具外筒14的推力下向下运动，锥筒6相对膨胀环12上移，由于锥筒6的外径由上至下逐渐变大，当锥筒6上移后膨胀环12膨胀，进而使得胶筒13膨胀密封，当胶筒13、卡瓦9与套管的配合紧到不可压缩且压力达到一定值时,实现卡瓦9坐挂、胶筒13坐封，同时下剪钉4在座封工具中心拉杆1拉力作用下被剪断,座封工具中心拉杆1与本实用新型脱开,完成丢手动作；在丢手完成并进行射孔后，起出入井工具，投入复合材料球，待球入座后，即可在本实用新型上层进行压裂施工。The utility model is connected with the seat seal tool and goes into the well together. The seat seal tool outer cylinder 14 is installed on the seat seal tool center pull rod 1 above the sleeve 11, and the lower end of the seat seal tool outer cylinder 14 is offset against the upper end of the sleeve 11; After the sealing tool and the utility model are lowered to the predetermined position at the bottom of the well, the slow-burning gunpowder in the sealing tool is pressurized and ignited through cable ignition or oil pipe connection, and the thrust generated by the high-pressure gas generated in the combustion chamber is applied by the outer cylinder 14 of the sealing tool For the sleeve 11, the pulling force is applied to the upper shear nail 5 and the lower shear nail 4 by the central rod 1 of the sealing tool. When the tension reaches a certain value, the upper shear nail 5 is cut off, and the central rod 1 of the sealing tool passes through the lower shear nail 4. Pull the pusher sleeve 2 to move upwards, and the pusher sleeve 2 pushes the slips 9 to move upward along the cone surface of the cone ring 7 to climb the slope. Due to the existence of the slot 10, when the slips 9 move upwards along the cone ring 7, the slips 9 expand. Finally, the slip 9 is seated; at the same time, the sleeve 11 moves downward under the thrust of the outer cylinder 14 of the seating tool, and the cone 6 moves upward relative to the expansion ring 12. Since the outer diameter of the cone 6 gradually changes from top to bottom Large, when the cone cylinder 6 moves up, the expansion ring 12 expands, and then the rubber cylinder 13 expands and seals. When the rubber cylinder 13, the slips 9 and the casing are tightly matched and the pressure reaches a certain value, the slips 9 are realized. Seat hanging, rubber tube 13 set seal, at the same time, the lower shear nail 4 is cut off under the pulling force of the center tie rod 1 of the seat seal tool, the center pull rod 1 of the seat seal tool is disengaged from the utility model, and the action of throwing away is completed; After the perforation, the tool for entering and exiting the well is lifted, and the composite material ball is dropped in. After the ball is seated, the fracturing construction can be carried out on the upper layer of the utility model.
可根据实际需要，对上述压裂用桥塞作进一步优化或/和改进：According to actual needs, the above bridge plugs for fracturing can be further optimized or/and improved:
如附图1所示，卡瓦9的下端与限位环台3的上端之间通过键槽安装在一起，这样可以保证卡瓦9不会发生径向转动，为施工顺利进行提供保障。As shown in accompanying drawing 1, the lower end of the slip 9 and the upper end of the limit ring platform 3 are installed together through a keyway, which can ensure that the slip 9 will not rotate radially and provide guarantee for the smooth progress of the construction.
如附图1所示，膨胀环12的壁厚为1.25mm。将膨胀环12的壁厚设计成1.25mm，可以保证当锥筒6上移后，膨胀环12能够有效膨胀。As shown in Figure 1, the wall thickness of the expansion ring 12 is 1.25mm. Designing the wall thickness of the expansion ring 12 to be 1.25 mm can ensure that the expansion ring 12 can expand effectively when the cone cylinder 6 moves up.
如附图1所示，对应限位环台3的推进套2与座封工具中心拉杆1之间沿圆周均匀固定安装有三个下剪钉4。固定安装有三个下剪钉4即能保证安装的可靠性，又能满足后续作业中剪断下剪钉4完成丢手作业的剪切力。As shown in Figure 1, three lower shear pins 4 are evenly fixed and installed along the circumference between the push sleeve 2 corresponding to the limit ring platform 3 and the center rod 1 of the seat seal tool. The fixed installation of three lower shear nails 4 can ensure the reliability of the installation, and can meet the shearing force of cutting the lower shear nails 4 in the follow-up operation to complete the operation of throwing away.
如附图1所示，在推进套2上方的座封工具中心拉杆1与锥筒6之间沿圆周均匀固定安装有三个上剪钉5。固定安装有三个下剪钉5，即能满足安装的可靠性，又能满足剪断上剪钉5实现锥筒6上移的剪切力。As shown in FIG. 1 , three upper shear nails 5 are evenly and fixedly installed along the circumference between the center tie rod 1 of the setting tool above the push sleeve 2 and the cone 6 . There are three lower shear nails 5 fixedly installed, which can satisfy the reliability of installation and meet the shearing force of shearing the upper shear nails 5 to realize the upward movement of the cone 6 .
以上技术特征构成了本实用新型的最佳实施例，其具有较强的适应性和最佳实施效果，可根据实际需要增减非必要的技术特征，来满足不同情况的需求。The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520516353.7UCN204877376U (en) | 2015-07-17 | 2015-07-17 | Bridge Plugs for Fracturing |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520516353.7UCN204877376U (en) | 2015-07-17 | 2015-07-17 | Bridge Plugs for Fracturing |
| Publication Number | Publication Date |
|---|---|
| CN204877376Utrue CN204877376U (en) | 2015-12-16 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520516353.7UExpired - LifetimeCN204877376U (en) | 2015-07-17 | 2015-07-17 | Bridge Plugs for Fracturing |
| Country | Link |
|---|---|
| CN (1) | CN204877376U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481308A (en)* | 2016-12-09 | 2017-03-08 | 中国石油集团西部钻探工程有限公司 | Temporary plugging large-diameter bridge plug and production tubing running method |
| CN106522879A (en)* | 2016-12-09 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Claw rubber tube sealing type large diameter bridge plug |
| CN110513076A (en)* | 2019-09-24 | 2019-11-29 | 中国石油集团西部钻探工程有限公司 | The solvable bridge plug of pressure break metal sealing |
| CN111648739A (en)* | 2020-06-29 | 2020-09-11 | 中国石油天然气集团有限公司 | Soluble bridge plug for rubber cylinder protection fracturing |
| CN112228004A (en)* | 2020-09-24 | 2021-01-15 | 齐齐哈尔亚盛机械制造有限公司 | Fishable bridge plug for well lifting and pressure relief |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481308A (en)* | 2016-12-09 | 2017-03-08 | 中国石油集团西部钻探工程有限公司 | Temporary plugging large-diameter bridge plug and production tubing running method |
| CN106522879A (en)* | 2016-12-09 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Claw rubber tube sealing type large diameter bridge plug |
| CN106481308B (en)* | 2016-12-09 | 2019-06-14 | 中国石油集团西部钻探工程有限公司 | Production oil pipe running method |
| CN110513076A (en)* | 2019-09-24 | 2019-11-29 | 中国石油集团西部钻探工程有限公司 | The solvable bridge plug of pressure break metal sealing |
| CN111648739A (en)* | 2020-06-29 | 2020-09-11 | 中国石油天然气集团有限公司 | Soluble bridge plug for rubber cylinder protection fracturing |
| CN112228004A (en)* | 2020-09-24 | 2021-01-15 | 齐齐哈尔亚盛机械制造有限公司 | Fishable bridge plug for well lifting and pressure relief |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | Effective date of registration:20201109 Address after:100120 Beijing Xicheng District six laying Kang Patentee after:CHINA NATIONAL PETROLEUM Corp. Patentee after:CNPC Xibu Drilling Engineering Co.,Ltd. Address before:830026 science and technology management division, West drilling and Drilling Engineering Institute, No. 326 South Central Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region, China Patentee before:CNPC Xibu Drilling Engineering Co.,Ltd. | |
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