CN204941345U - A kind of radial well transfer with packing function - Google Patents

A kind of radial well transfer with packing function Download PDF

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CN204941345U
CN204941345U CN201520481516.2U CN201520481516U CN204941345U CN 204941345 U CN204941345 U CN 204941345U CN 201520481516 U CN201520481516 U CN 201520481516U CN 204941345 U CN204941345 U CN 204941345U
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rubber tube
steering
tube
central
channel
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裴柏林
张遂安
刘秉谦
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China University of Petroleum Beijing
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China University of Petroleum Beijing
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Abstract

本实用新型提供了一种带有封隔功能的径向井转向装置,该装置由上接头、上中心管、上封隔胶筒、中心转向室、下中心管、下封隔胶筒、下接头构成;中心转向室上下两侧分别与上中心管和下中心管连接,上中心管上端与上接头连接,下中心管下端与下接头连接;上封隔胶筒套装在上中心管外,下封隔胶筒套装在下中心管外;上接头下端和下接头上端分别设置有固定环。本实用新型应用于实现径向井钻井和压裂作业工具一体化,是一种新的可实现柔性钻柱转向和套管封隔的井下装置,该装置操作简单,安全实用,并且可以大大缩短作业时间,节约成本。

The utility model provides a radial well steering device with a sealing function. Composition; the upper and lower sides of the center steering chamber are respectively connected with the upper central tube and the lower central tube, the upper end of the upper central tube is connected with the upper joint, and the lower end of the lower central tube is connected with the lower joint; the upper sealing rubber tube is set outside the upper central tube, and the lower The sealing rubber tube is set outside the lower central pipe; the lower end of the upper joint and the upper end of the lower joint are respectively provided with fixing rings. The utility model is applied to realize the integration of radial well drilling and fracturing operation tools. It is a new downhole device that can realize flexible drill string steering and casing isolation. The device is easy to operate, safe and practical, and can greatly shorten the operating time time and cost savings.

Description

一种带有封隔功能的径向井转向装置A Radial Well Steering Device with Isolation Function

技术领域technical field

本实用新型涉及一种带有封隔功能的径向井转向装置,属于油田用井下工具。The utility model relates to a radial well steering device with a sealing function, belonging to downhole tools for oilfields.

背景技术Background technique

径向井钻井技术是近年来兴起的新型钻井技术,径向井钻井技术采用特殊的转向装置实现柔性钻柱以超短的曲率半径转向,并利用高压水射流的能量破岩。径向井水平孔直径小,因此径向井常应用于煤层气、页岩气的开发过程中以解决井壁稳定性差的问题。Radial well drilling technology is a new type of drilling technology that has emerged in recent years. The radial well drilling technology uses a special steering device to realize the steering of the flexible drill string with an ultra-short radius of curvature, and uses the energy of high-pressure water jets to break rocks. Radial wells have small horizontal hole diameters, so radial wells are often used in the development of coalbed methane and shale gas to solve the problem of poor wellbore stability.

煤层和页岩储层渗透率低,非均质性强,在开发过程中必须进行压裂改造以达到增产的目的。由于径向井水平孔直径小,造斜段曲率半径短,常规的水平井压裂管串工具无法应用于径向井,因此径向井压裂作业常借助于封隔器封隔套管,再通过油管向产层高压泵入压裂液,提高径向井水平孔中流体的压力。当径向井水平孔中的流体压力高于岩石的破裂压力时,岩石破裂,形成裂缝。Coal seams and shale reservoirs have low permeability and strong heterogeneity, and fracturing must be carried out in the development process to achieve the purpose of increasing production. Due to the small diameter of the horizontal hole in radial wells and the short radius of curvature of the build-up section, conventional horizontal well fracturing string tools cannot be applied to radial wells. The fracturing fluid is pumped into the production layer at high pressure to increase the pressure of the fluid in the horizontal hole of the radial well. When the fluid pressure in the horizontal hole of the radial well is higher than the fracture pressure of the rock, the rock fractures and fractures are formed.

这种压裂方式需要先将径向井钻井工具从井下提出,再下入封隔器。频繁的起下管柱不仅增加作业量,更提高作业成本。This fracturing method requires the radial well drilling tool to be raised from the downhole first, and then run into the packer. Frequent lifting and lowering of the pipe string not only increases the workload, but also increases the operating cost.

实用新型内容Utility model content

本实用新型需要解决的技术问题就在于克服现有技术的缺陷,提供一种带有封隔功能的径向井转向装置,它应用于实现径向井钻井和压裂作业工具一体化,是一种新的可实现柔性钻柱转向和套管封隔的井下装置,该装置操作简单,安全实用,并且可以大大缩短作业时间,节约成本。The technical problem to be solved by the utility model lies in overcoming the defects of the prior art, and providing a radial well steering device with an isolation function, which is applied to realize the integration of radial well drilling and fracturing operation tools, and is a new A downhole device that can realize flexible drill string steering and casing isolation. The device is easy to operate, safe and practical, and can greatly shorten operation time and save costs.

为了达到上述目的,本实用新型采用如下技术方案:In order to achieve the above object, the utility model adopts the following technical solutions:

本实用新型提供了一种带有封隔功能的径向井转向装置,所述装置由上接头、上中心管、上封隔胶筒、中心转向室、下中心管、下封隔胶筒、下接头构成,所述中心转向室上下两侧分别与上中心管和下中心管连接,所述上中心管上端与上接头连接,所述下中心管下端与下接头连接,所述上封隔胶筒套装在上中心管外,所述下封隔胶筒套装在下中心管外,所述上接头下端和下接头上端分别设置有固定环。The utility model provides a radial well steering device with a sealing function. The upper and lower sides of the central steering chamber are respectively connected with the upper central pipe and the lower central pipe, the upper end of the upper central pipe is connected with the upper joint, the lower end of the lower central pipe is connected with the lower joint, and the upper sealant The sleeve is set outside the upper central tube, the lower sealing rubber tube is sleeved outside the lower central tube, and the lower end of the upper joint and the upper end of the lower joint are respectively provided with fixing rings.

所述中心转向室内设置有一条柔性钻柱转向通道和两条液流通道,转向通道内壁镶嵌可转动的滚珠,每条液流通道进口端都设置有单向阀,每条液流通道设置有三个出口。The center steering chamber is provided with a flexible drill string steering channel and two liquid flow channels, the inner wall of the steering channel is inlaid with rotatable balls, each liquid flow channel is provided with a check valve at the inlet end, and each liquid flow channel is provided with three export.

所述上封隔胶筒由内胶筒和外胶筒构成,内胶筒和外胶筒上端连接处采用热硫化工艺硫化为一体,内胶筒和外胶筒中间有腔体,下端设置有进液通道,进液通道与中心转向室液流通道出口连通,连通处设置有密封圈密封。The upper sealing rubber cylinder is composed of an inner rubber cylinder and an outer rubber cylinder. The joints of the upper ends of the inner rubber cylinder and the outer rubber cylinder are vulcanized as a whole by a heat vulcanization process. There is a cavity in the middle of the inner rubber cylinder and the outer rubber cylinder. The liquid inlet channel communicates with the outlet of the liquid flow channel in the center steering chamber, and the connection is provided with a sealing ring for sealing.

所述下封隔胶筒由内胶筒和外胶筒构成,内胶筒和外胶筒下端连接处采用热硫化工艺硫化为一体,内胶筒和外胶筒中间有腔体,上端设置有进液通道,进液通道与中心转向室液流通道出口连通,连通处设置有密封圈密封。The lower sealing rubber cylinder is composed of an inner rubber cylinder and an outer rubber cylinder, and the joint of the lower end of the inner rubber cylinder and the outer rubber cylinder is vulcanized as a whole by a heat vulcanization process. There is a cavity in the middle of the inner rubber cylinder and the outer rubber cylinder, and a The liquid inlet channel communicates with the outlet of the liquid flow channel in the center steering chamber, and the connection is provided with a sealing ring for sealing.

其中,所述上、下封隔胶筒中内、外胶筒之间的腔体均与中心转向室的液流通道相互连通。Wherein, the cavities between the inner and outer rubber cylinders of the upper and lower packing rubber cylinders communicate with the liquid flow channel of the central steering chamber.

进一步地,所述下中心管中设置有溢流通道,所述溢流通道出口处设置有解封销钉,所述溢流通道与下封隔胶筒中的内胶筒和外胶筒之间的腔体连通。所述下中心管腔体内设置有剪切活塞,所述剪切活塞与中心转向室底面通过弹簧连接。Further, an overflow channel is provided in the lower center pipe, and an unsealing pin is provided at the outlet of the overflow channel, and the gap between the overflow channel and the inner rubber tube and the outer rubber tube in the lower sealing rubber tube cavity connected. A shearing piston is arranged in the cavity of the lower central tube, and the shearing piston is connected to the bottom surface of the central steering chamber through a spring.

在施工过程中,首先将装置从套管下入到预定位置,连续油管下端连接柔性钻柱,柔性钻柱通过中心转向室转向通道由垂直转为水平,柔性钻柱在内部高压流体的作用下实现自进式钻进。待完成钻进、洗井等工序后,向连续油管与中心管之间的环空高压注入流体,流体通过中心转向室上的单向阀进入液流通道,一方面,流体通过液流通道流入下中心管中的空腔中,流体推动剪切活塞下行,直到剪切活塞的运动被解封销钉阻挡;另一方面流体通过液流通道流入上、下封隔胶筒的内、外胶筒之间的腔体中,在压力作用下,流体逐渐充满内、外胶筒之间的腔体,并迫使外胶筒向外膨胀实现坐封,停止向连续油管与中心管之间的环空注入液体。坐封后,通过连续油管向水平孔中泵注压裂液,当水平孔中流体的压裂高于岩石破裂压力时,岩石破裂,形成裂缝。完成压裂过程后,继续向连续油管与中心管之间的环空注入高压流体,并不断提高注入压力,直到流体注入压力达到解封销钉的承压临界值时,剪切活塞剪断销钉,实现解封。During the construction process, firstly, the device is lowered from the casing to the predetermined position, the lower end of the coiled tubing is connected to the flexible drill string, and the flexible drill string is turned from vertical to horizontal through the steering channel of the central steering chamber, and the flexible drill string is under the action of the internal high-pressure fluid Realize self-propelled drilling. After the drilling and well washing are completed, fluid is injected into the annular space between the coiled tubing and the center pipe at high pressure, and the fluid enters the flow channel through the check valve on the center steering chamber. On the one hand, the fluid flows into the flow channel through the flow channel. In the cavity in the lower central tube, the fluid pushes the shearing piston downward until the movement of the shearing piston is blocked by the unsealing pin; on the other hand, the fluid flows into the inner and outer rubber cylinders of the upper and lower sealing rubber cylinders through the liquid flow channel In the cavity between the coiled tubing and the center tube, the fluid gradually fills the cavity between the inner and outer rubber tubes under pressure, and forces the outer rubber tube to expand outward to realize the setting seal, and stops flowing to the annulus between the coiled tubing and the center tube. Inject liquid. After setting, the fracturing fluid is pumped into the horizontal hole through the coiled tubing. When the fracturing fluid in the horizontal hole is higher than the rock fracture pressure, the rock breaks and fractures are formed. After the fracturing process is completed, continue to inject high-pressure fluid into the annulus between the coiled tubing and the center pipe, and continuously increase the injection pressure until the fluid injection pressure reaches the pressure-bearing critical value of the unsealed pin, and the shear piston will shear the pin to achieve unblock.

本实用新型与现有的技术比较有以下有益效果:Compared with the prior art, the utility model has the following beneficial effects:

(1)可实现径向井钻井和压裂作业工具一体化,避免了对于单独起下钻井转向装置和压裂封隔装置作业量大,作业周期长,成本高的缺陷。(1) It can realize the integration of radial well drilling and fracturing operation tools, avoiding the defects of large operation volume, long operation period and high cost for the single tripping drilling steering device and fracturing isolation device.

(2)装置操作简单,安全可靠。(2) The device is easy to operate, safe and reliable.

附图说明Description of drawings

图1为本实用新型结构正视图。Fig. 1 is a front view of the structure of the utility model.

图2为本实用新型结构左视图。Fig. 2 is a left view of the structure of the utility model.

具体实施方式detailed description

如图1、图2所示,本实用新型提供了一种带有封隔功能的径向井转向装置,所述装置由上接头2、上中心管7、上封隔胶筒3、中心转向室12、下中心管13、下封隔胶筒16、下接头17构成,所述中心转向室12上下两侧分别与上中心管7和下中心管13连接,所述上中心管7上端与上接头2连接,所述下中心管13下端与下接头17连接,所述上封隔胶筒3套装在上中心管7外,所述下封隔胶筒16套装在下中心管13外,所述上接头2下端和下接头17上端分别设置有固定环。As shown in Figure 1 and Figure 2, the utility model provides a radial well steering device with a sealing function, the device consists of an upper joint 2, an upper central pipe 7, an upper sealing rubber cylinder 3, and a central steering chamber 12. The lower central pipe 13, the lower sealing rubber tube 16, and the lower joint 17 are formed. The upper and lower sides of the central steering chamber 12 are respectively connected with the upper central pipe 7 and the lower central pipe 13. The upper end of the upper central pipe 7 is connected to the upper The lower end of the lower central pipe 13 is connected with the lower joint 17, the upper packing rubber tube 3 is set outside the upper central pipe 7, and the lower packing rubber tube 16 is set outside the lower central pipe 13. The lower end of the upper joint 2 and the upper end of the lower joint 17 are respectively provided with fixing rings.

所述中心转向室12内设置有一条柔性钻柱转向通道10和两条液流通道11,转向通道10内壁镶嵌可转动的滚珠20,每条液流通道11进口端都设置有单向阀8,每条液流通道11设置有三个出口。The central steering chamber 12 is provided with a flexible drill string steering channel 10 and two liquid flow channels 11, the inner wall of the steering channel 10 is inlaid with rotatable balls 20, and the inlet end of each liquid flow channel 11 is provided with a one-way valve 8 , each liquid flow channel 11 is provided with three outlets.

所述上封隔胶筒3由内胶筒6和外胶筒4构成,内胶筒6和外胶筒4上端连接处采用热硫化工艺硫化为一体,内胶筒6和外胶筒4中间有腔体,下端设置有进液通道,进液通道与中心转向室12液流通道11出口连通,连通处设置有密封圈9密封。The upper sealing rubber cylinder 3 is composed of an inner rubber cylinder 6 and an outer rubber cylinder 4. The joints at the upper ends of the inner rubber cylinder 6 and the outer rubber cylinder 4 are vulcanized as a whole by a thermal vulcanization process. The middle of the inner rubber cylinder 6 and the outer rubber cylinder 4 is There is a cavity, and the lower end is provided with a liquid inlet channel, which communicates with the outlet of the central steering chamber 12, the liquid flow channel 11, and the connection is provided with a sealing ring 9 for sealing.

所述下封隔胶筒16由内胶筒6和外胶筒4构成,内胶筒6和外胶筒4下端连接处采用热硫化工艺硫化为一体,内胶筒6和外胶筒4中间有腔体,上端设置有进液通道,进液通道与中心转向室12液流通道11出口连通,连通处设置有密封圈9密封。The lower sealing rubber cylinder 16 is composed of an inner rubber cylinder 6 and an outer rubber cylinder 4. The lower end connection of the inner rubber cylinder 6 and the outer rubber cylinder 4 is vulcanized as a whole by a thermal vulcanization process. The middle of the inner rubber cylinder 6 and the outer rubber cylinder 4 is There is a cavity, and the upper end is provided with a liquid inlet channel, which communicates with the outlet of the central steering chamber 12, the liquid flow channel 11, and the connection is provided with a sealing ring 9 for sealing.

其中,所述上封隔胶筒3和下封隔胶筒16中内、外胶筒之间的腔体均与中心转向室12的液流通道11相互连通。Wherein, the cavities between the inner and outer rubber cylinders of the upper packing rubber cylinder 3 and the lower packing rubber cylinder 16 communicate with the liquid flow channel 11 of the central turning chamber 12 .

进一步地,所述下中心管13中设置有溢流通道14,所述溢流通道14出口处设置有解封销钉17,所述溢流通道14与下封隔胶筒16中的内胶筒6和外胶筒4之间的腔体连通。所述下中心管13腔体内设置有剪切活塞21,所述剪切活塞21与中心转向室底面通过弹簧20连接。Further, an overflow channel 14 is provided in the lower central pipe 13, and an unsealing pin 17 is provided at the outlet of the overflow channel 14, and the overflow channel 14 is connected to the inner rubber tube in the lower sealing rubber tube 16. 6 communicates with the cavity between the outer rubber cartridge 4. A shearing piston 21 is arranged in the cavity of the lower central tube 13 , and the shearing piston 21 is connected to the bottom surface of the central steering chamber through a spring 20 .

在施工过程中,首先将装置从套管1下入到预定位置,连续油管5下端连接柔性钻柱19,柔性钻柱19通过中心转向室12转向通道10由垂直转为水平,柔性钻柱19在内部高压流体的作用下实现自进式钻进。待完成钻进、洗井等工序后,向连续油管5与中心管7之间的环空高压注入流体,流体通过中心转向室上的单向阀8进入液流通道,一方面,流体通过液流通道流入下中心管13中的空腔中,流体推动剪切活塞21下行,直到剪切活塞21的运动被解封销钉15阻挡;另一方面流体通过液流通道11流入上、下封隔胶筒的内、外胶筒之间的腔体中,在压力作用下,流体逐渐充满内、外胶筒之间的腔体,并迫使外胶筒6向外膨胀实现坐封,停止向连续油管5与中心管7之间的环空注入液体。坐封后,通过连续油管5向水平孔中泵注压裂液,当水平孔中流体的压裂高于岩石破裂压力时,岩石破裂,形成裂缝。完成压裂过程后,继续向连续油管5与中心管7之间的环空注入高压流体,并不断提高注入压力,直到流体注入压力达到解封销钉15的承压临界值时,剪切活塞21剪断销钉15,实现解封。In the construction process, firstly, the device is lowered from the casing 1 to a predetermined position, the lower end of the coiled tubing 5 is connected to the flexible drill string 19, and the flexible drill string 19 is turned from vertical to horizontal through the central steering chamber 12 and the channel 10, and the flexible drill string 19 Self-propelled drilling is realized under the action of internal high-pressure fluid. After drilling, well washing and other processes are completed, fluid is injected into the annular space between the coiled tubing 5 and the center pipe 7 under high pressure, and the fluid enters the liquid flow channel through the check valve 8 on the center steering chamber. On the one hand, the fluid passes through the liquid The flow channel flows into the cavity in the lower central tube 13, and the fluid pushes the shear piston 21 downward until the movement of the shear piston 21 is blocked by the unsealing pin 15; on the other hand, the fluid flows into the upper and lower compartments through the liquid flow channel 11 In the cavity between the inner and outer rubber tubes of the rubber tube, under the action of pressure, the fluid gradually fills the cavity between the inner and outer rubber tubes, and forces the outer rubber tube 6 to expand outwards to realize setting and stop the continuous flow. Liquid is injected into the annular space between the oil pipe 5 and the central pipe 7 . After setting, the fracturing fluid is pumped into the horizontal hole through the coiled tubing 5, and when the fracturing fluid in the horizontal hole is higher than the rock fracture pressure, the rock breaks and fractures are formed. After the fracturing process is completed, continue to inject high-pressure fluid into the annulus between the coiled tubing 5 and the center pipe 7, and continuously increase the injection pressure until the fluid injection pressure reaches the pressure-bearing critical value of the unblocking pin 15, and the shear piston 21 Cut pin 15 to realize unsealing.

最后应说明的是:显然,上述实施例仅仅是为清楚地说明本实用新型所作的举例,而并非对实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本实用新型的保护范围之中。Finally, it should be noted that obviously, the above-mentioned embodiments are only examples for clearly illustrating the utility model, rather than limiting the implementation manner. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the protection scope of the present utility model.

Claims (6)

1.一种带有封隔功能的径向井转向装置,其特征在于:所述装置由上接头、上中心管、上封隔胶筒、中心转向室、下中心管、下封隔胶筒、下接头构成,所述中心转向室上下两侧分别与上中心管和下中心管连接,所述上中心管上端与上接头连接,所述下中心管下端与下接头连接,所述上封隔胶筒套装在上中心管外,所述下封隔胶筒套装在下中心管外,所述上接头下端和下接头上端分别设置有固定环。 1. A radial well steering device with a pack-off function, characterized in that: the device consists of an upper joint, an upper central pipe, an upper packing rubber tube, a central steering chamber, a lower central pipe, a lower packing rubber tube, The upper and lower sides of the central steering chamber are respectively connected with the upper central pipe and the lower central pipe, the upper end of the upper central pipe is connected with the upper joint, the lower end of the lower central pipe is connected with the lower joint, and the upper packing The rubber tube is set outside the upper central tube, the lower sealing rubber tube is set outside the lower central tube, and the lower end of the upper joint and the upper end of the lower joint are respectively provided with fixing rings. 2.如权利要求1所述的一种带有封隔功能的径向井转向装置,其特征在于:所述中心转向室内设置有一条柔性钻柱转向通道和两条液流通道,转向通道内壁镶嵌可转动的滚珠,每条液流通道进口端都设置有单向阀,每条液流通道设置有三个出口。 2. A radial well steering device with isolation function according to claim 1, characterized in that: said central steering chamber is provided with a flexible drill string steering channel and two liquid flow channels, and the inner wall of the steering channel is inlaid The rotatable ball is provided with a one-way valve at the inlet end of each liquid flow channel, and each liquid flow channel is provided with three outlets. 3.如权利要求1所述的一种带有封隔功能的径向井转向装置,其特征在于:所述上封隔胶筒由内胶筒和外胶筒构成,内胶筒和外胶筒上端连接处采用热硫化工艺硫化为一体,内胶筒和外胶筒中间有腔体,下端设置有进液通道,进液通道与中心转向室液流通道出口连通,连通处设置有密封圈密封。 3. A radial well steering device with isolation function as claimed in claim 1, characterized in that: the upper isolation rubber tube is composed of an inner rubber tube and an outer rubber tube, and the inner rubber tube and the outer rubber tube The connection at the upper end is vulcanized as a whole by thermal vulcanization process. There is a cavity between the inner rubber tube and the outer rubber tube. The lower end is provided with a liquid inlet channel. The liquid inlet channel is connected with the outlet of the liquid flow channel in the center steering chamber. . 4.如权利要求1所述的一种带有封隔功能的径向井转向装置,其特征在于:所述下封隔胶筒由内胶筒和外胶筒构成,内胶筒和外胶筒下端连接处采用热硫化工艺硫化为一体,内胶筒和外胶筒中间有腔体,上端设置有进液通道,进液通道与中心转向室液流通道出口连通,连通处设置有密封圈密封。 4. A radial well steering device with isolation function as claimed in claim 1, characterized in that: the lower isolation rubber tube is composed of an inner rubber tube and an outer rubber tube, and the inner rubber tube and the outer rubber tube The connection at the lower end is vulcanized as a whole by thermal vulcanization process. There is a cavity between the inner rubber tube and the outer rubber tube. The upper end is provided with a liquid inlet channel. The liquid inlet channel is connected with the outlet of the liquid flow channel in the center steering chamber, and the connection is provided with a sealing ring. . 5.如权利要求1或3或4所述的一种带有封隔功能的径向井转向装置,其特征在于:所述上、下封隔胶筒中内、外胶筒之间的腔体均与中心转向室的液流通道相互连通。 5. A radial well steering device with isolation function as claimed in claim 1, 3 or 4, characterized in that: the cavities between the inner and outer rubber cylinders in the upper and lower isolation rubber cylinders are uniform. It communicates with the liquid flow channel of the center turning chamber. 6.如权利要求1或4所述的一种带有封隔功能的径向井转向装置,其特征在于:所述下中心管中设置有溢流通道,所述溢流通道出口处设置有解封销钉,该溢流通道与下封隔胶筒中的内胶筒和外胶筒之间的腔体连通,所述下中心管腔体内设置有剪切活塞,所述剪切活塞与中心转向室底面通过弹簧连接。 6. A radial well steering device with isolation function as claimed in claim 1 or 4, characterized in that: an overflow passage is arranged in the lower central pipe, and a solution is arranged at the outlet of the overflow passage. Sealing pin, the overflow channel communicates with the cavity between the inner rubber tube and the outer rubber tube in the lower pack-off rubber tube, and a shearing piston is arranged in the cavity of the lower central tube, and the shearing piston is connected with the center steering chamber The bottom faces are connected by springs.
CN201520481516.2U 2015-07-07 2015-07-07 A kind of radial well transfer with packing function Expired - Fee Related CN204941345U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337666A (en) * 2015-07-07 2017-01-18 中国石油大学(北京) Underground packer realizing radial well drilling tool turning
CN106761535A (en) * 2016-11-24 2017-05-31 中国石油大学(北京) A kind of packer
CN109751010A (en) * 2017-11-06 2019-05-14 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 packer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337666A (en) * 2015-07-07 2017-01-18 中国石油大学(北京) Underground packer realizing radial well drilling tool turning
CN106337666B (en) * 2015-07-07 2018-10-16 中国石油大学(北京) A kind of downhole packing device that achievable radial well drilling tool turns to
CN106761535A (en) * 2016-11-24 2017-05-31 中国石油大学(北京) A kind of packer
CN109751010A (en) * 2017-11-06 2019-05-14 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 packer

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