CN111779462A - Floating hoop and rubber plug interlocking device and application method - Google Patents
Floating hoop and rubber plug interlocking device and application method Download PDFInfo
- Publication number
- CN111779462A CN111779462A CN202010764385.4A CN202010764385A CN111779462A CN 111779462 A CN111779462 A CN 111779462A CN 202010764385 A CN202010764385 A CN 202010764385A CN 111779462 A CN111779462 A CN 111779462A
- Authority
- CN
- China
- Prior art keywords
- lock
- rubber plug
- groove body
- spoiler
- lock pins
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007667 floating Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010874 unset cement Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The interlocking device of the float collar and the rubber plug and the application method are oil well and gas well cementing technology, which overcomes the defects of other prior technologies, and the structural relationship is that the lower part of the rubber plug is provided with an aluminum lock groove body which is concentric with the rubber plug and is vulcanized into a whole at high temperature; the upper part of the spoiler is provided with four telescopic lock pins, guide grooves are arranged in the lock pin mounting holes, guide keys are arranged on the lock pins, and the lock pins do not rotate in the radial direction, so that the circular arc surfaces of the lock pins are ensured to be upward all the time, and the reliability is improved; after the four sets of lock pins 3 and the springs are installed in the holes, the spoiler is welded on the spoiler to form a new spoiler assembly, and then the spoiler assembly is installed in the floating collar.
Description
Technical Field
The invention relates to an oil and gas well cementing technology, in particular to a floating hoop and rubber plug interlocking device and an application method thereof.
Background
In the oil and gas well cementing construction process, after the rubber plug is pressed, whether the sealing performance of the float collar one-way valve is effective can be judged by observing the pressure fluctuation of the displacement fluid. And if no displacement liquid is gushed out, the sealing performance is proved to be reliable, at the moment, the pressure building waiting set is not needed, and then the cement head is dismantled, the waiting set is carried out, and the preparation for casing pressure test is carried out. However, the sealing performance of the float collar check valve is reduced due to the factors such as the change of the temperature and the pressure at the bottom of the well, the quality of the float collar check valve (which is washed by a large amount of discharged cement slurry) and the like. The upper part of the floating collar has no downward pressure, and the unset cement paste is pushed by the bottom hole pressure to return upwards and is solidified in the casing above the floating collar to form a cement plug, so that the artificial bottom hole is lifted, and the length of the cement plug can reach 100-400 meters in severe cases. The formation of the cement plug greatly increases the workload of drilling plugs of a drilling team, and simultaneously causes part of cement rings in the well to be loose, thereby influencing the well cementation quality.
Disclosure of Invention
The invention aims at providing a floating hoop and rubber plug interlocking device with stronger safety and stability and an application method, which overcome the defects of other prior art, and the device comprises a rubber plug, a lock groove body, a lock pin, a spoiler, a guide groove, a blocking plate, a spring and a guide key, wherein the lower part of the rubber plug is provided with an aluminum lock groove body which is concentric with the rubber plug and is vulcanized into a whole at high temperature; the upper part of the spoiler is provided with four telescopic lock pins, guide grooves are formed in the lock pin mounting holes, guide keys are arranged on the lock pins, and the lock pins do not rotate in the radial direction, so that the arc surfaces of the lock pins are ensured to be upward all the time, and the reliability is improved; after the four sets of lock pins and the springs are installed in the holes, the blocking plate is welded on the flow blocking plate to form a new flow blocking plate assembly, and then the flow blocking plate assembly is installed in the floating hoop.
The upper part of an inner hole of the spoiler is provided with an R4 round corner, and the excircle of the lower part of the lock groove body is provided with a 15-degree conical surface, so that the spoiler can conveniently enter the spoiler ring.
The upper portion of the lock pin is an R25 arc surface, so that the rubber plug lock groove body can conveniently enter, and the lower portion of the lock pin is a straight surface, so that the phenomenon of interlocking failure caused by withdrawing the lock pin when the pressure of the lower portion is increased can be avoided.
The application method of the invention is as follows: under the pressure of the displacement liquid, the rubber plug is pushed out from the cement head to enter the sleeve and move downwards, when the rubber plug reaches the upper part of the spoiler, the lock groove body enters the spoiler hole, the 15-degree conical surface of the lock groove body collides and presses the upper R25 arc surfaces of the four lock pins, the rubber plug continues to move downwards under the guidance of the arc surfaces, meanwhile, the lock pins horizontally contract inwards along the guide keys and the guide grooves, when the lower part of the lock groove body is in contact with the lower part of the spoiler hole, the annular groove of the lock groove body is completely aligned with the axis of the lock pins, the lock pins have no outward pressure, the rubber plug horizontally stretches out of the annular groove of the lock groove body under the pushing of the spring, and at the moment, the rubber. When the check valve fails, the cement slurry at the bottom of the well returns upwards, the lock groove body cannot move upwards due to the fact that the lower portion of the lock pin is a straight surface, the rubber plug and the lock groove body are of an integrated structure and cannot naturally move upwards, and it is guaranteed that the rubber portion of the rubber plug is in close contact with the casing pipe to achieve sealing at the same position of the casing pipe. Therefore, under the condition that the one-way valve fails, the rubber plug can also play a role in sealing, time is gained for waiting for setting, and the redundant cement plug is formed in an inorganic mode.
The significance of the invention is as follows: the basic functions of the floating hoop and the rubber plug are not changed, and the interlocking is realized after the collision and the pressing, so that the upward movement of the rubber plug is avoided; the safety and stability of well cementation are improved, and the well cementation quality is improved.
Drawings
Fig. 1 is a schematic structural diagram of a floating hoop and rubber plug interlocking device, wherein the device comprises a floating hoop and rubber plug 1, a rubber plug 2, a lock groove body 3, a lock pin 4, a spoiler 5, a guide groove 6, a spoiler 7, a spring 8 and a guide key.
Fig. 2 is a top view of the interlocking device of the float collar and the rubber plug, in the figure, 3, a locking pin 7 and a spring.
Fig. 3 is a schematic structural diagram of the lock pin, in the figure 8, a guide key 9, a straight surface 10 and an arc surface.
FIG. 4 is a side view of the locking pin, FIG. 8, showing the guide key.
Detailed Description
The rubber plug comprises a rubber plug 1, a lock groove body 2, a lock pin 3, a spoiler 4, a guide groove 5, a blocking plate 6, a spring 7 and a guide key 8, wherein the lower part of the rubber plug 1 is provided with the aluminum lock groove body 2, and the lock groove body 2 and the rubber plug 1 are concentric and vulcanized into a whole at high temperature; the upper part of the spoiler 4 is provided with four telescopic lock pins 3, guide grooves 5 are formed in mounting holes of the lock pins 3, guide keys 8 are arranged on the lock pins 3, and the lock pins 3 do not rotate in the radial direction, so that the circular arc surfaces of the lock pins 3 are ensured to be upward all the time, and the reliability is improved; after the four sets of lock pins 3 and the springs 7 are installed in the holes, the spoiler 6 is welded to the spoiler 4 to form a new spoiler assembly, and then the spoiler assembly is installed in the floating collar.
In embodiment 2, the upper part of the inner hole of the spoiler 4 is provided with a R4 round corner, and the outer circle of the lower part of the lock groove body 2 is provided with a 15-degree conical surface, so that the spoiler 4 can be conveniently entered.
Embodiment 4, the application method of the present invention is that, under the pressure of the displacement fluid, the rubber plug is pushed out from the cement head, enters the casing and goes downward, when the rubber plug reaches the upper position of the spoiler 4, the lock groove body 2 enters the hole of the spoiler 4, the 15 ° conical surface position of the lock groove body 2 collides and presses the upper arc surface 10 of the four lock pins 3, and continues to go downward under the guidance of the arc surface, and simultaneously the lock pins 3 shrink horizontally into the hole along the guide key 8 and the guide groove 5, when the lower part of the lock groove body 2 contacts the lower part of the hole of the spoiler 4, the annular groove of the lock groove body 2 is completely aligned with the axis of the lock pins 3, the lock pins 3 have no outward pressure, and then horizontally extend out of the annular groove of the lock groove body 2 under the urging of the spring 7, and at this time, the rubber. When the check valve fails, the cement slurry at the bottom of the well returns upwards, the lock groove body 2 cannot move upwards due to the fact that the lower portion of the lock pin 3 is the straight surface 9, the rubber plug 1 and the lock groove body 2 are of an integrated structure and cannot naturally move upwards, and it is guaranteed that the rubber part of the rubber plug 1 is in close contact with the casing pipe to achieve sealing at the same position of the casing pipe. Therefore, under the condition that the one-way valve fails, the rubber plug 1 can also play a role in sealing, time is gained for waiting for setting, and the excess cement plug is formed in an inorganic mode.
Claims (4)
1. Float hoop and plug interlock, including plug (1), lock groove body (2), lockpin (3), spoiler (4), guide way (5), closure plate (6), spring (7), guide key (8), characterized by: the lower part of the rubber plug (1) is provided with an aluminum lock groove body (2), and the lock groove body (2) and the rubber plug (1) are concentric and vulcanized into a whole at high temperature; the upper part of the spoiler (4) is provided with four telescopic lock pins (3), guide grooves (5) are formed in mounting holes of the lock pins (3), guide keys (8) are arranged on the lock pins (3), and the lock pins (3) do not rotate in the radial direction, so that the circular arc surfaces of the lock pins (3) are ensured to be upward all the time; after the four sets of lock pins and the springs (7) are installed in the holes, the flow blocking plate (6) is welded on the flow blocking plate (4) to form a new flow blocking plate assembly, and then the flow blocking plate assembly is installed in the floating hoop.
2. The device for interlocking the float collar and the rubber plug as claimed in claim 1, wherein: the upper part of an inner hole of the spoiler (4) is provided with an R4 round corner, and the outer circle of the lower part of the lock groove body (2) is provided with a 15-degree conical surface, so that the spoiler (4) can be conveniently entered.
3. The device for interlocking the float collar and the rubber plug as claimed in claim 1, wherein: the upper portion of the lock pin (3) is an R25 arc surface (10), so that the rubber plug lock groove body (2) can conveniently enter, the lower portion of the lock pin (3) is a straight surface (9), and the phenomenon of interlocking failure caused by the fact that the lock pin (3) is retracted when the pressure of the lower portion is increased can be avoided.
4. The application method of the floating hoop and rubber plug interlocking device of claim 1 is characterized in that: when the upper part of the spoiler (4) is reached, the lock groove body (2) enters the hole of the spoiler (4), the 15-degree conical surface of the lock groove body (2) is pressed against the upper arc surface (10) of the four lock pins (3), the lock pins continue to move downwards under the guidance of the arc surface (10), meanwhile, the lock pins (3) horizontally contract towards the hole along the guide keys (8) and the guide grooves (5), when the lower part of the lock groove body (2) contacts the lower part of the hole of the spoiler (4), the annular grooves of the lock groove body (2) are completely aligned with the axes of the lock pins (3), the lock pins (3) have no outward pressure, and the rubber plug (1) horizontally stretches out of the annular grooves of the lock groove body (2) under the pushing of the spring (7), and at the moment, the rubber plug (1) and the floating hoop spoiler (4; when the check valve fails, the cement slurry at the bottom of the well returns upwards, the lock groove body (2) cannot move upwards due to the fact that the lower portion of the lock pin (3) is the straight surface (9), the rubber plug (1) and the lock groove body (2) are of an integrated structure and cannot naturally move upwards, and it is guaranteed that the rubber part of the rubber plug (1) is tightly contacted with the casing pipe at the same position of the casing pipe to achieve sealing; therefore, under the condition that the one-way valve fails, the rubber plug (1) can also play a sealing effect, time is gained for waiting for setting, and the excess cement plug is formed in an inorganic mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764385.4A CN111779462A (en) | 2020-08-02 | 2020-08-02 | Floating hoop and rubber plug interlocking device and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764385.4A CN111779462A (en) | 2020-08-02 | 2020-08-02 | Floating hoop and rubber plug interlocking device and application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111779462A true CN111779462A (en) | 2020-10-16 |
Family
ID=72765688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010764385.4A Pending CN111779462A (en) | 2020-08-02 | 2020-08-02 | Floating hoop and rubber plug interlocking device and application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111779462A (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2143260Y (en) * | 1992-11-05 | 1993-10-06 | 徐田 | Rubber spigot structure for casing of oil well |
| WO2001006085A1 (en) * | 1999-07-16 | 2001-01-25 | Earth Tool Company, L.L.C. | Improved sonde housing structure |
| US6453998B1 (en) * | 2000-10-31 | 2002-09-24 | Robert W. M. Reeve | Progressive lock integral joint centralizer |
| CN101338633A (en) * | 2007-07-05 | 2009-01-07 | 章林峰 | Spring-free lock with plate tumbler |
| CN101979822A (en) * | 2010-11-13 | 2011-02-23 | 中国石油集团西部钻探工程有限公司 | Anti-rotation device for well cementing glue plug |
| CN201810264U (en) * | 2010-10-22 | 2011-04-27 | 中国石油天然气股份有限公司 | Well cementing rubber plug of lock pin type |
| CN203097813U (en) * | 2012-07-16 | 2013-07-31 | 袁淑英 | Flow restricting self-filling float collar for manifold cycles |
| CN203547652U (en) * | 2013-10-30 | 2014-04-16 | 中国石油集团渤海钻探工程有限公司 | Float collar and rubber plug assembly for drilling liner cementing |
| CN203867517U (en) * | 2014-05-07 | 2014-10-08 | 中国石油化工集团公司 | Well cementation slurry blocking device |
| CN104514516A (en) * | 2013-09-30 | 2015-04-15 | 扬州市油田金达实业有限公司 | Automatic grouting float collar |
| CN104514515A (en) * | 2013-09-30 | 2015-04-15 | 扬州市油田金达实业有限公司 | Automatic grouting float shoe |
| CN204283333U (en) * | 2014-10-31 | 2015-04-22 | 中国石油化工集团公司 | Well cementing impact pressure self-closing valve |
| CN205135545U (en) * | 2015-11-13 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Play column type auto -lock plug and play column type self -lock device |
| CN106121583A (en) * | 2016-08-30 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | Self-locking float shoe |
| CN106837238A (en) * | 2016-12-21 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of self-locking plug |
| CN206487435U (en) * | 2017-02-08 | 2017-09-12 | 中石化石油工程技术服务有限公司 | The totally-enclosed brill plug device of high pressure shallow-layer |
| CN107816327A (en) * | 2017-10-24 | 2018-03-20 | 宝鸡石油机械有限责任公司 | Mechanical multifunctional underwater installation installs retracting device |
| CN207420538U (en) * | 2017-10-30 | 2018-05-29 | 中国石油集团渤海钻探工程有限公司 | Anti-rotation anti-back cementing plug |
| CN214365992U (en) * | 2020-08-02 | 2021-10-08 | 濮阳中原三力创高机械设备有限公司 | Interlocking device for float collar and rubber plug |
-
2020
- 2020-08-02 CN CN202010764385.4A patent/CN111779462A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2143260Y (en) * | 1992-11-05 | 1993-10-06 | 徐田 | Rubber spigot structure for casing of oil well |
| WO2001006085A1 (en) * | 1999-07-16 | 2001-01-25 | Earth Tool Company, L.L.C. | Improved sonde housing structure |
| US6453998B1 (en) * | 2000-10-31 | 2002-09-24 | Robert W. M. Reeve | Progressive lock integral joint centralizer |
| CN101338633A (en) * | 2007-07-05 | 2009-01-07 | 章林峰 | Spring-free lock with plate tumbler |
| CN201810264U (en) * | 2010-10-22 | 2011-04-27 | 中国石油天然气股份有限公司 | Well cementing rubber plug of lock pin type |
| CN101979822A (en) * | 2010-11-13 | 2011-02-23 | 中国石油集团西部钻探工程有限公司 | Anti-rotation device for well cementing glue plug |
| CN203097813U (en) * | 2012-07-16 | 2013-07-31 | 袁淑英 | Flow restricting self-filling float collar for manifold cycles |
| CN104514515A (en) * | 2013-09-30 | 2015-04-15 | 扬州市油田金达实业有限公司 | Automatic grouting float shoe |
| CN104514516A (en) * | 2013-09-30 | 2015-04-15 | 扬州市油田金达实业有限公司 | Automatic grouting float collar |
| CN203547652U (en) * | 2013-10-30 | 2014-04-16 | 中国石油集团渤海钻探工程有限公司 | Float collar and rubber plug assembly for drilling liner cementing |
| CN203867517U (en) * | 2014-05-07 | 2014-10-08 | 中国石油化工集团公司 | Well cementation slurry blocking device |
| CN204283333U (en) * | 2014-10-31 | 2015-04-22 | 中国石油化工集团公司 | Well cementing impact pressure self-closing valve |
| CN205135545U (en) * | 2015-11-13 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Play column type auto -lock plug and play column type self -lock device |
| CN106121583A (en) * | 2016-08-30 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | Self-locking float shoe |
| CN106837238A (en) * | 2016-12-21 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of self-locking plug |
| CN206487435U (en) * | 2017-02-08 | 2017-09-12 | 中石化石油工程技术服务有限公司 | The totally-enclosed brill plug device of high pressure shallow-layer |
| CN107816327A (en) * | 2017-10-24 | 2018-03-20 | 宝鸡石油机械有限责任公司 | Mechanical multifunctional underwater installation installs retracting device |
| CN207420538U (en) * | 2017-10-30 | 2018-05-29 | 中国石油集团渤海钻探工程有限公司 | Anti-rotation anti-back cementing plug |
| CN214365992U (en) * | 2020-08-02 | 2021-10-08 | 濮阳中原三力创高机械设备有限公司 | Interlocking device for float collar and rubber plug |
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