技术领域technical field
本发明涉及一种石油钻采设备，特别是一种水泥承留器。 The invention relates to oil drilling equipment, in particular to a cement retainer.
背景技术Background technique
油田开发中、后期由于油井水泥返高以上套管腐蚀穿孔，水泥固井段出现渗漏，使油层邻近高压水层的地层水流入井筒，或油层能量下降邻近高压水层与油层互窜造成油井含水上升或油层水淹，给油田开发带来严重困难。目前一些生产多年的老油井，长期高含水，处于关井状态，分析判断：一是经过长期开采，可能油层套管腐蚀穿孔，套管漏失造成油层水淹；二是可能高压注水井长期高压注水，与该井油层形成水头锥进而造成油层水淹。三是可能在油层附近有高压水层与油层互窜导致油层水淹。对这些井通过封隔器找漏排除了套管腐蚀穿孔漏失的可能。采用同位素测井，发现在油层下部有一邻近高压水层与油层互窜，使该井全部产水。In the middle and late stage of oilfield development, due to the corrosion and perforation of the casing above the oil well cement return height, the cement cementing section leaks, causing the formation water in the oil layer adjacent to the high-pressure water layer to flow into the wellbore, or the energy of the oil layer drops adjacent to the high-pressure water layer and the oil layer. The rise of water cut or water flooding of oil layers will bring serious difficulties to the development of oil fields. At present, some old oil wells that have been in production for many years have long-term high water content and are in the state of shutting down. Analysis and judgment: First, after long-term exploitation, the oil layer casing may be corroded and perforated, and casing leakage may cause oil layer water flooding; , forming a water head cone with the oil layer of the well and causing water flooding of the oil layer. The third is that there may be a high-pressure water layer and the oil layer near the oil layer, which may lead to water flooding of the oil layer. For these wells, leak detection through packers eliminates the possibility of casing corrosion and perforation leakage. Using isotope logging, it was found that there was an adjacent high-pressure water layer in the lower part of the oil layer and the oil layer crossed, so that the well produced all water.
对于这种情况，常规的处理方法是先在高压水层射开工程孔，再对高压水层进行化学封堵——主要是水泥浆封堵。封堵完后再将水泥塞钻开，然后恢复油层的开采。但是该井的生产油层在高压水层之上并且相邻很近，使用常规的封堵方法不但在工程施工中带有很大的风险性，而且难以保证油层不被水泥浆堵塞，特别是对高压水层挤堵，有可能出现高压水层外吐水泥浆，使挤堵失败。所以只有采用下入工具将油层和与它相邻高压水层隔开，再对高压水层进行封堵。For this situation, the conventional treatment method is to shoot engineering holes in the high-pressure water layer first, and then chemically seal the high-pressure water layer—mainly cement slurry plugging. After the plugging is completed, the cement plug is drilled, and then the exploitation of the oil layer is resumed. However, the production oil layer of this well is above the high-pressure water layer and is very close to each other. Using conventional plugging methods not only brings great risks in engineering construction, but also makes it difficult to ensure that the oil layer will not be blocked by cement slurry, especially for If the high-pressure water layer is clogged, the high-pressure water layer may spit out cement slurry, causing the clogging to fail. Therefore, the only way to separate the oil layer from its adjacent high-pressure water layer is to use the running tool, and then block the high-pressure water layer.
水泥承留器已经被使用了很多年，传统的水泥承留器采用金属材质，通过钻杆或油管下入井内，虽然常规的水泥承留器密封性好，耐压差高，密封时间长，也可以磨铣，但是在磨铣时容易发生中途座封，磨铣时间花费较长，磨铣后的金属碎屑比重大，返排困难，因此有必要开发一种具在快速钻除性能的复合材料水泥承留器来解决上述问题。The cement retainer has been used for many years. The traditional cement retainer is made of metal, and it is lowered into the well through the drill pipe or tubing. Although the conventional cement retainer has good sealing performance, high pressure difference resistance and long sealing time, It can also be ground and milled, but it is prone to midway seat sealing during grinding and milling, the grinding and milling time is relatively long, the proportion of metal debris after milling and milling is large, and it is difficult to flow back. Composite cement retainer to solve the above problems.
发明内容Contents of the invention
本发明的目的在于提供一种水泥承留器，他不仅下管柱时不易中途坐封，而且坐封成功率高，封堵效果好。The purpose of the present invention is to provide a cement retainer, which not only is not easy to set in the middle of the pipe string, but also has a high setting success rate and good plugging effect.
实现本发明目的的技术方案是: 一种水泥承留器，包括中心管、套于中心管外壁顶端的上卡瓦以及套于中心管外壁下部的下卡瓦，其特征在于:所述的中心管外径具有变径台阶，最大外径处设置有均布孔，有剪切销设置在均布孔内，所述的上、下卡瓦与中心管之间均具有间隙，有上、下锥体分别楔入上、下卡瓦与中心管间的间隙之中，所述的上、下锥体之间沿轴向布置有胶筒，所述的中心管外壁下端还连接有套阀，有一阀体一端设置在中心管内壁下端另一端延伸至该套阀内，所述的阀体与套阀内壁之间设有密封机构。The technical solution for realizing the purpose of the present invention is: a cement retainer, comprising a center pipe, an upper slip placed on the top of the center pipe outer wall and a lower slip placed on the lower part of the center pipe outer wall, characterized in that: the center The outer diameter of the tube has variable diameter steps, and uniformly distributed holes are arranged at the largest outer diameter, and shear pins are arranged in the uniformly distributed holes. There are gaps between the upper and lower slips and the center pipe, and there are upper and lower The cones are respectively wedged into the gaps between the upper and lower slips and the central pipe. A rubber sleeve is arranged between the upper and lower cones in the axial direction. The lower end of the outer wall of the central pipe is also connected with a sleeve valve. One end of a valve body is arranged at the lower end of the inner wall of the central tube and the other end extends into the sleeve valve, and a sealing mechanism is provided between the valve body and the inner wall of the sleeve valve.
而且所述的上卡瓦由四片卡瓦组成，沿上卡瓦内壁设置有弹性钢带以及铝带，有卡箍套于该上卡瓦的外壁之上。Moreover, the upper slip is composed of four slips, elastic steel strips and aluminum strips are arranged along the inner wall of the upper slip, and a hoop is set on the outer wall of the upper slip.
而且所述的下卡瓦为一体成型结构。Moreover, the lower slips are integrally formed.
而且所述的所述上、下卡瓦与上、下锥体之间为锥面接触，其锥面的配合角度为12～20°。Moreover, the upper and lower slips and the upper and lower cones are in contact with conical surfaces, and the matching angle of the conical surfaces is 12-20°.
而且所述的上锥体与中心管之间通过销钉连接，所述的下锥体与中心管为键配合并通过销钉固定。Moreover, the upper cone and the central tube are connected by pins, and the lower cone and the central tube are keyed and fixed by pins.
而且所述的阀体上端沿轴向开有2～4个均布槽。Moreover, the upper end of the valve body is provided with 2 to 4 uniformly distributed grooves along the axial direction.
而且所述的密封机构由密封挡圈、密封阀背圈总成以及第二“O”形密封圈组成，该密封机构将套阀上端的一系列孔密封。Moreover, the sealing mechanism is composed of a sealing retaining ring, a sealing valve back ring assembly and a second "O" sealing ring, and the sealing mechanism seals a series of holes at the upper end of the sleeve valve.
而且所述的上、下锥体与胶筒之间均设置有背圈，该背圈由内、外背圈组成，所述的外背圈上的突起部分与内背圈上的凹进部分相配合。Moreover, a back ring is arranged between the upper and lower cones and the rubber tube, and the back ring is composed of an inner back ring and an outer back ring. The protruding part on the outer back ring and the concave part on the inner back ring match.
而且所述的胶筒与中心管之间还具有第一“O”形密封圈以及用于固定该第一“O”形密封圈的承留环。Moreover, there is also a first "O"-shaped sealing ring and a retaining ring for fixing the first "O"-shaped sealing ring between the rubber cartridge and the central pipe.
本发明的优点在于:1.外径较小，下管柱时不易中途坐封，略大于套管内径的坐封工具的弧形弹簧式紧贴套管内壁利于完成坐封；2.上下各一组双向卡瓦能保证桥塞坐封的成功率，对井筒的封堵效果好；3.在水泥浆挤堵过程中，其内部的压力平衡阀可以成功地防止水泥浆上返，避免水泥浆卡钻和油管内水泥堵塞事故的发生。The advantages of the present invention are: 1. The outer diameter is small, it is not easy to set halfway when the pipe string is lowered, and the arc-shaped spring type of the setting tool slightly larger than the inner diameter of the casing is close to the inner wall of the casing to facilitate the completion of setting; A set of two-way slips can ensure the success rate of bridge plug setting, and have a good plugging effect on the wellbore; 3. During the cement slurry plugging process, the internal pressure balance valve can successfully prevent the cement slurry from going up and avoid cement Slurry sticking and cement blockage accidents in tubing.
附图说明Description of drawings
图1是水泥承留器的结构示意图；Fig. 1 is the structural representation of cement retainer;
图2是水泥承留器的使用状态参考图。Fig. 2 is a reference diagram of the use state of the cement retainer.
其中，1、上卡瓦2、卡箍，3、铆钉，4、弹性钢带，5、铝带，6、剪切销，7、销钉，8、锁环，9、上锥体，10、挡环，11、外背圈，12、内背圈，13、胶筒，14、承留环，15、第一“O”型密封圈， 18、下锥体，19、键，20、中心管，21、下卡瓦，22、紧定螺钉，23、套阀，24、第二“O”型密封圈， 25、阀体，26、密封挡圈，27、密封阀背圈总成，28、收剑套Among them, 1. Upper slip 2. Clamp, 3. Rivet, 4. Elastic steel belt, 5. Aluminum belt, 6. Shear pin, 7. Pin, 8. Lock ring, 9. Upper cone, 10. Retaining ring, 11, outer back ring, 12, inner back ring, 13, rubber tube, 14, retaining ring, 15, first "O" type sealing ring, 18, lower cone, 19, key, 20, center Tube, 21, lower slip, 22, set screw, 23, sleeve valve, 24, second "O" type sealing ring, 25, valve body, 26, sealing retaining ring, 27, sealing valve back ring assembly, 28. Sword collection
31、上端接头，32、坐封工具中心管，33、上端衬套，34、上端挡圈，35、第一内六角螺钉，36、弹簧片，37、轴向弹性挡圈，38、下端挡圈，39、下端衬套，40、控制套，41、第二内六角螺钉，42、第三内六角螺钉，43、控制螺母焊接总成，44、控制螺母挡圈，45、支撑套，46、坐封工具第一“O”型密封圈，47、紧定螺钉，48、凸轮块，49、销，50、复合弹簧，51、座封套，52、控制弹性接头，53、插入接头，54、密封环总成，55、坐封工具第二“O”型密封圈，56、移相接头，57、第四内六角螺钉。31. Upper joint, 32. Central tube of setting tool, 33. Upper bushing, 34. Upper retaining ring, 35. First hexagon socket head cap screw, 36. Spring leaf, 37. Axial elastic retaining ring, 38. Lower end stop Ring, 39, lower bushing, 40, control sleeve, 41, second hexagon socket head screw, 42, third inner hexagon screw, 43, control nut welding assembly, 44, control nut retaining ring, 45, support sleeve, 46 , The first "O" type sealing ring of setting tool, 47, set screw, 48, cam block, 49, pin, 50, composite spring, 51, seat cover, 52, control elastic joint, 53, insert joint, 54 . Sealing ring assembly, 55. The second "O" type sealing ring of the setting tool, 56. Phase-shifting joint, 57. The fourth hexagon socket head cap screw.
具体实施方式Detailed ways
参见图1～2以下将结合实施例对本发明做进一步说明。Referring to Figs. 1-2, the present invention will be further described below in conjunction with embodiments.
一种石油钻采设备，特别是一种水泥承留器，包括中心管20、套于中心管20外壁顶端的上卡瓦1以及套于中心管20外壁下部的下卡瓦21，其特征在于:所述的中心管20外径具有变径台阶，最大外径处设置有均布孔，有剪切销6设置在均布孔内，所述的上、下卡瓦1、21与中心管20之间均具有间隙，有上、下锥体9、18分别楔入上、下卡瓦1、21与中心管20间的间隙之中，所述的上、下锥体9、18之间沿轴向布置有胶筒13，所述的中心管20外壁下端还连接有套阀23，有一阀体25一端设置在中心管20内壁下端另一端延伸至该套阀23内，所述的阀体25与套阀23内壁之间设有密封机构。A kind of oil drilling and production equipment, especially a cement retainer, comprising a central pipe 20, an upper slip 1 sleeved on the top of the outer wall of the central pipe 20, and a lower slip 21 sleeved on the lower part of the outer wall of the central pipe 20, characterized in that : the outer diameter of the center pipe 20 has a variable diameter step, the maximum outer diameter is provided with evenly distributed holes, and the shear pins 6 are arranged in the evenly distributed holes, and the upper and lower slips 1, 21 and the center pipe There are gaps between the 20, and the upper and lower cones 9, 18 are respectively wedged into the gaps between the upper and lower slips 1, 21 and the central tube 20. The upper and lower cones 9, 18 are A rubber cartridge 13 is arranged in the axial direction, and the lower end of the outer wall of the central tube 20 is also connected with a sleeve valve 23. One end of a valve body 25 is arranged on the lower end of the inner wall of the central tube 20 and the other end extends into the sleeve valve 23. The valve A sealing mechanism is provided between the body 25 and the inner wall of the sleeve valve 23 .
工作时，利用钻杆或油管输送水泥承留器和相应机械坐封工具，到达预定坐封位置后，将管柱上提0.6米，它提供了释放上卡瓦1及控制弹性接头52所必需的行程；充分右旋管柱，使用坐封工具右旋至少10圈以上，将控制螺母43从中心管20上的螺纹上旋出将控制套40释放出来；再次下放管柱到预定的坐封位置，弧型弹簧36与套管之间的摩擦力可以使控制套40与坐封套51保持不动，下放动作可将上卡瓦1从坐封套51中推出，此时，上卡瓦1内的弹性钢带4可使上卡瓦1紧贴在套管壁上，在上卡瓦1被释放出来的过程中，支撑套45从凸轮块48上脱开，凸轮块48被弹出，从而控制弹性接头52从插入接头53上被释放出来，使得它们之间可以有一定的相对轴向运动；由于先前上卡瓦1在释放时已经紧贴套管内壁，缓慢上提管柱，使坐封工具承受相应的拉力，坐封工具通过控制弹性接头52连接水泥承留器的中心管20上端螺纹，中心管20带动阀套23上行，阀套23推动下端卡瓦21上行，下端卡瓦21剪断第二销钉29，推着下外背圈17、下内背圈16和胶筒13上行，胶筒13带着承留环14、上内背圈12和上外背圈11向上挤压上锥体9，上锥体9剪断第一销钉7后继续上行并挤压上卡瓦1，使上卡瓦1进一步咬入套管中，继续上提管柱，胶筒13进一步压缩并贴紧套管内壁，下端卡瓦21破裂并咬在套管内壁上，这时锁环8的锯齿锁在中心管20锯齿上，维持胶筒13座封；右旋机械坐封工具10圈以上，这将剪断水泥承留器上的剪切螺钉6，并使控制弹性接头52从水泥承留器旋出，再上提直至丢手；缓慢下放管柱，使插管打开阀体25，根据施工设计，开始混浆并挤注水泥，挤完水泥后，相对于承留器上提0.5米左右后，即可关闭阀体，反循环洗井，替出管柱内的多余泥浆。When working, use the drill pipe or oil pipe to transport the cement retainer and the corresponding mechanical setting tool. After reaching the predetermined setting position, lift the pipe string up 0.6 meters, which provides the necessary for releasing the upper slip 1 and controlling the elastic joint 52. Fully turn the pipe string to the right, use the setting tool to turn right for at least 10 turns, unscrew the control nut 43 from the thread on the center pipe 20 to release the control sleeve 40; lower the pipe string again to the predetermined setting position, the friction between the arc spring 36 and the bushing can keep the control sleeve 40 and the setting sleeve 51 still, and the lowering action can push the upper slip 1 out of the setting sleeve 51. At this time, the upper slip 1 The elastic steel belt 4 can make the upper slip 1 close to the casing wall. During the process of releasing the upper slip 1, the support sleeve 45 is disengaged from the cam block 48, and the cam block 48 is ejected, thereby controlling The elastic joint 52 is released from the insertion joint 53, so that there can be a certain relative axial movement between them; since the upper slip 1 has been close to the inner wall of the casing when it was released, the pipe string is slowly lifted up, so that the setting The tool bears the corresponding tension, and the setting tool is connected to the thread at the upper end of the central pipe 20 of the cement retainer by controlling the elastic joint 52. The central pipe 20 drives the valve sleeve 23 upward, and the valve sleeve 23 pushes the lower slip 21 upward, and the lower slip 21 is cut off. The second pin 29 pushes the lower outer back ring 17, the lower inner back ring 16 and the rubber tube 13 to go up, and the rubber tube 13 pushes the upper cone upward with the retaining ring 14, the upper inner back ring 12 and the upper outer back ring 11. body 9, the upper cone 9 cuts off the first pin 7 and continues to move upwards and squeezes the upper slip 1, so that the upper slip 1 further bites into the casing, continues to lift the string, and the rubber tube 13 is further compressed and tightly attached to the casing. The inner wall of the tube, the slip 21 at the lower end is broken and bit on the inner wall of the casing. At this time, the serrations of the lock ring 8 are locked on the serrations of the central tube 20 to maintain the seat seal of the rubber tube 13; the right-handed mechanical setting tool is turned more than 10 times, which will Cut off the shear screw 6 on the cement retainer, and unscrew the control elastic joint 52 from the cement retainer, and then lift it up until it is dropped; slowly lower the pipe string, so that the intubation tube opens the valve body 25. According to the construction design, Start to mix the slurry and squeeze the cement. After the cement is squeezed, the valve body can be closed after lifting about 0.5 meters relative to the retainer, and the well is flushed by reverse circulation to replace the excess mud in the pipe string.
而且所述的上卡瓦1由四片卡瓦组成，沿上卡瓦1内壁设置有弹性钢带4以及铝带5，有卡箍2套于该上卡瓦1的外壁之上。Moreover, the upper slip 1 is composed of four slips, elastic steel strips 4 and aluminum strips 5 are arranged along the inner wall of the upper slip 1 , and clamps 2 are set on the outer wall of the upper slip 1 .
上卡瓦1通过弹性钢带4、铝带5以及卡箍2固定。The upper slip 1 is fixed by the elastic steel band 4, the aluminum band 5 and the hoop 2.
进一步的技术方案可以是所述的下卡瓦21为整体成型结构。A further technical solution may be that the lower slip 21 is an integrally formed structure.
上卡瓦1的分瓣式结构相对于下卡瓦2整体成型结构，在坐封时，先是上卡瓦1推动上锥体9挤压胶筒13，当挤压力达到下卡瓦21破裂值时，下卡瓦21才破裂并咬在套管上，这样的坐封方式有利用于胶筒密封。The split structure of the upper slip 1 is compared with the overall molding structure of the lower slip 2. When setting, the upper slip 1 pushes the upper cone 9 to squeeze the rubber tube 13. When the extrusion force reaches the lower slip 21, it ruptures. When the value is set, the lower slip 21 breaks and bites on the casing. Such a setting method is beneficial for the sealing of the rubber cartridge.
而且所述的所述上、下卡瓦1、21与上、下锥体9、18之间为锥面接触，其锥面的配合角度为12～20°。Moreover, the upper and lower slips 1, 21 and the upper and lower cones 9, 18 are in contact with conical surfaces, and the matching angle of the conical surfaces is 12-20°.
锥面的配合角度为12～20°，小角度锥面有利于轴向力的传递，有利于胶筒的挤压及上、下卡瓦1、21咬住套管,而且该配合角度有利于卡瓦与锥体间的自锁。The matching angle of the tapered surface is 12-20°. The small-angled tapered surface is conducive to the transmission of axial force, the extrusion of the rubber tube and the biting of the upper and lower slips 1 and 21 on the casing. Self-locking between slips and cones.
而且所述的上锥体9与中心管20之间通过销钉7连接，所述的下锥体18与中心管20为键配合并通过销钉7固定。Moreover, the upper cone 9 is connected with the central tube 20 through a pin 7 , and the lower cone 18 is keyed with the central tube 20 and fixed through the pin 7 .
上、下锥体9、18通过销钉7与中心管20连接，可以防止水泥承留器在下井过程中提前坐封。The upper and lower cones 9, 18 are connected with the center pipe 20 through the pin 7, which can prevent the cement retainer from setting in advance during the downhole process.
进一步的技术方案也可以是所述的阀体25上端沿轴向开有2～4个均布槽。A further technical solution may also be that the upper end of the valve body 25 is provided with 2 to 4 uniformly distributed grooves along the axial direction.
在阀体25上端沿轴向开有2～4个均布槽，使阀体25的上端具有一定的弹性。The upper end of the valve body 25 is provided with 2 to 4 evenly distributed grooves along the axial direction, so that the upper end of the valve body 25 has certain elasticity.
而且所述的密封机构由密封挡圈26、密封阀背圈总成27以及第二“O”形密封圈24组成，该密封机构将套阀23上端的一系列孔密封。Moreover, the sealing mechanism is composed of a sealing retaining ring 26, a sealing valve back ring assembly 27 and a second "O" sealing ring 24, and the sealing mechanism seals a series of holes at the upper end of the sleeve valve 23.
通过阀体25与套阀23之间的密封机构来密封套阀23上端的一系列孔密封。A series of holes at the upper end of the sleeve valve 23 are sealed by a sealing mechanism between the valve body 25 and the sleeve valve 23 .
而且所述的上、下锥体9、18与胶筒13之间均设置有背圈，该背圈由内、外背圈11、12组成，所述的外背圈11上的突起部分与内背圈12上的凹进部分相配合。And between described upper and lower cones 9,18 and rubber tube 13, back rings are all arranged, and this back ring is made up of inner and outer back rings 11,12, and the protruding part on the described outer back ring 11 and The recessed part on the inner back ring 12 cooperates.
采用外背圈11上的突起部分与内背圈12上的凹进部分相配合的连接方式，结构稳固，不易松脱。The connection mode in which the protruding part on the outer back ring 11 is matched with the recessed part on the inner back ring 12 is adopted, and the structure is stable and not easy to loosen.
进一步的技术方案还可以是所述的胶筒13与中心管20之间还具有第一“O”形密封圈15以及用于固定该第一“O”形密封圈15的承留环14。A further technical solution may also include a first “O”-shaped sealing ring 15 and a retaining ring 14 for fixing the first “O”-shaped sealing ring 15 between the rubber cartridge 13 and the central tube 20 .
胶筒13在挤压时会产生鼓涨效应，胶筒13密封水泥承留器与套管环空和胶筒13与中心管20，同时胶筒13与承留环14密封，而第一“O”形密封圈15则被用来进一步密封承留环14与中心管20。The rubber sleeve 13 will produce a bulging effect when squeezed. The rubber sleeve 13 seals the cement retainer and the casing annulus and the rubber sleeve 13 and the center pipe 20. At the same time, the rubber sleeve 13 and the retaining ring 14 seal, and the first " The O"-shaped sealing ring 15 is used to further seal the retaining ring 14 and the central tube 20 .
本发明专利申请已于同日，就同一主题申请了实用新型专利。The patent application for this invention has been applied for a utility model patent on the same subject on the same day.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410128000.XACN103912237A (en) | 2014-04-01 | 2014-04-01 | Cement bearing and retaining unit |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410128000.XACN103912237A (en) | 2014-04-01 | 2014-04-01 | Cement bearing and retaining unit |
| Publication Number | Publication Date |
|---|---|
| CN103912237Atrue CN103912237A (en) | 2014-07-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410128000.XAPendingCN103912237A (en) | 2014-04-01 | 2014-04-01 | Cement bearing and retaining unit |
| Country | Link |
|---|---|
| CN (1) | CN103912237A (en) |
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| CN201065749Y (en)* | 2007-08-10 | 2008-05-28 | 四机赛瓦石油钻采设备有限公司 | Cement retainer sealing tool |
| CN201568017U (en)* | 2009-12-25 | 2010-09-01 | 濮阳市亿隆石油机械有限公司 | Cementing plug pack-off device for exploration and development of oilfield |
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| CN203441430U (en)* | 2013-09-16 | 2014-02-19 | 新疆华油技术服务股份有限公司 | Cement squeezing device in horizontal well construction |
| CN203835327U (en)* | 2014-04-01 | 2014-09-17 | 四机赛瓦石油钻采设备有限公司 | Cement retainer |
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| CN104196464A (en)* | 2014-08-27 | 2014-12-10 | 杰瑞能源服务有限公司 | Tubular column string and bridge plug setting and sand blasting perforation combining method |
| CN108035694A (en)* | 2018-01-03 | 2018-05-15 | 成都维泰油气能源技术有限公司 | A kind of cement retainer |
| CN108035694B (en)* | 2018-01-03 | 2023-11-24 | 成都维泰油气能源技术有限公司 | Cement retainer |
| CN110145278A (en)* | 2019-04-23 | 2019-08-20 | 中石化石油工程技术服务有限公司 | Bridge Plug with Cartridge Assembly |
| CN110145278B (en)* | 2019-04-23 | 2021-05-14 | 中石化石油工程技术服务有限公司 | Bridge plug with cartridge assembly |
| CN110080715A (en)* | 2019-05-27 | 2019-08-02 | 成都英诺思科技有限公司 | A kind of cement retainer |
| WO2020237454A1 (en)* | 2019-05-27 | 2020-12-03 | 成都英诺思科技有限公司 | Cement retainer |
| CN112682000A (en)* | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Hydraulic setting tool for completing cement squeezing operation by one-trip pipe column |
| CN112682000B (en)* | 2019-10-18 | 2022-09-23 | 中国石油化工股份有限公司 | Hydraulic setting tool for completing cement squeezing operation by one-trip pipe column |
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| CN103912237A (en) | Cement bearing and retaining unit | |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication | Application publication date:20140709 |