CN117248850A - Wellhead sealing protection device for oil well fracturing - Google Patents
Wellhead sealing protection device for oil well fracturing Download PDFInfo
- Publication number
- CN117248850A CN117248850A CN202311535553.2A CN202311535553A CN117248850A CN 117248850 A CN117248850 A CN 117248850A CN 202311535553 A CN202311535553 A CN 202311535553A CN 117248850 A CN117248850 A CN 117248850A
- Authority
- CN
- China
- Prior art keywords
- oil pipe
- fracturing
- pipe hanger
- hanger
- sealing
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 54
- 239000003129 oil well Substances 0.000 title claims abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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)
- Earth Drilling (AREA)
Abstract
A wellhead sealing protection device for oil well fracturing relates to the technical field of wellhead devices, and comprises an oil pipe head and an oil pipe hanger, wherein the lower end of the oil pipe hanger is in threaded sealing connection with an oil pipe, and the upper part of the oil pipe hanger is in threaded sealing connection with a fracturing four-way joint; the oil pipe head upper end is provided with sealing flange, be provided with between sealing flange and the oil pipe hanger and prevent changeing the subassembly, prevent changeing the subassembly and including the fixed axle, the axle sleeve, dwang and activity bolt, fixed axle fixed mounting is at the up end of oil pipe hanger, two axle sleeves of suit on every fixed axle, a dwang of fixed connection on every axle sleeve, the axial slip of dwang can take place again to the relative dwang of activity bolt, can take place the axial slip of activity bolt, threaded connection has a nut that is used for spacing to the activity bolt on the dwang, supply activity bolt male blind hole has been seted up at sealing flange up to prevent changeing the subassembly and play two-way spacing oil pipe hanger pivoted purpose, the better installation of being convenient for and dismantlement fracturing cross.
Description
Technical Field
The invention belongs to the technical field of wellhead devices, and particularly relates to a wellhead sealing protection device for oil well fracturing.
Background
In the later stages of oil and gas field development, some old wells and low pressure grade wells need to be subjected to fracturing, acidizing and yield increasing operations to have economic exploitation value. However, the working pressure required by fracturing is generally higher than that of the original wellhead equipment, and the seal at the wellhead oil pipe hanger cannot resist the impact of high pressure, so that a wellhead protection device is necessary to avoid accidents caused by the fact that the original wellhead seal is damaged and the pressure is too high.
Disclosure of Invention
In order to realize protection of the existing wellhead sealing device, the invention provides a wellhead sealing protection device for oil well fracturing, which realizes all threaded connection among all sections of a whole fracturing channel, ensures that fracturing pressure cannot act on a sealing component of a wellhead oil pipe hanger, and prevents the original wellhead sealing from being damaged.
The technical scheme provided by the invention is as follows: the wellhead sealing protection device for oil well fracturing comprises an oil pipe head and an oil pipe hanger, wherein the oil pipe hanger is positioned in the oil pipe head, the oil pipe hanger is in sealing fit with the oil pipe head, the lower end of the oil pipe hanger is in threaded sealing connection with an oil pipe, a fracturing four-way joint is arranged above the oil pipe hanger, and a lower connecting port of the fracturing four-way joint is in threaded sealing connection with the oil pipe hanger, so that the whole fracturing channel is ensured to be in threaded sealing connection; the oil pipe head upper end is provided with sealing flange, sealing flange passes sealing flange with the oil pipe head through bolt sealing connection, sealing flange and oil pipe hanger between be provided with anti-rotating subassembly, anti-rotating subassembly include fixed axle, axle sleeve, dwang and movable bolt, fixed axle fixed mounting is in oil pipe hanger's up end, the fixed axle is perpendicular with oil pipe hanger's up end, suit two axle sleeves on every fixed axle, two axle sleeves all can relative fixed axle rotation, a dwang of fixed connection on every axle sleeve, the dwang is perpendicular with the axle sleeve, movable bolt sets up perpendicularly with the dwang, movable bolt can take place the axial slip of dwang, can take place the axial slip of movable bolt again relative dwang, threaded connection has a nut for spacing to movable bolt on the dwang, set up the blind hole that supplies movable bolt to insert at sealing flange up end, the central line of all blind holes is located same virtual circle, after oil pipe hanger and its lower extreme oil pipe threaded connection, insert the activity in anti-rotating subassembly into the blind hole of sealing flange upper end to with the spacing blind hole on the movable bolt, thereby prevent that the cross thread from splitting when the cross connection can take place at the four-way thread hanger.
The further technical scheme is as follows: the side connection port of fracturing cross is upward inclined structure to reduce the angle that fracturing liquid got into.
The further technical scheme is as follows: the movable bolt is provided with a long hole, the rotating rod is inserted in the long hole, the end part of the rotating rod is hinged with a supporting rod, and the supporting rod can be used for supporting the movable bolt after rotating to the upper end, so that the movable bolt can be pulled out from the blind hole and supported when the oil pipe hanger is required to rotate, and the movable bolt is prevented from falling into the blind hole again.
The further technical scheme is as follows: the number of the blind holes is twice or more than twice of the number of the fixing shafts.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can realize all threaded connection among all sections of the whole fracturing channel, and the high pressure of fracturing bypasses the sealing component of the original wellhead oil pipe hanger, so that the high pressure of fracturing is ensured not to act on the original wellhead sealing component, and the original wellhead sealing is prevented from being damaged.
2. The anti-rotation assembly in the invention can prevent the oil pipe hanger from axial rotation after the installation, on one hand, the original seal between the oil pipe hanger and the oil pipe head is protected from being damaged by rotation, and on the other hand, the oil pipe hanger which does not rotate can be more conveniently in tight threaded sealing connection with the fracturing four-way joint.
Drawings
FIG. 1 is a cross-sectional view of the entire present invention.
Fig. 2 is a top view of an anti-rotation assembly of the present invention.
Fig. 3 shows the positional relationship between the movable latch and the rotating lever when the support rod at the end of the rotating lever is in the lower position state.
Fig. 4 is a position relation between a movable bolt and a rotating rod when a supporting rod at the end part of the rotating rod is in an upper position state.
In the figure: 1. a tubing head; 2. an oil pipe; 3. tubing hanger; 4. a sealing flange; 5. fracturing the four-way joint; 6. a rotating lever; 7. a movable bolt; 8. a nut; 9. a blind hole; 10. a fixed shaft; 11. a support rod; 12. an anti-rotation assembly; 13. a shaft sleeve.
Detailed Description
The embodiment comprises a tubing head 1 and a tubing hanger 3, wherein the tubing hanger 3 is positioned in the tubing head 1, the tubing hanger 3 is in sealing fit with the tubing head 1, the lower end of the tubing hanger 3 is in threaded sealing connection with the tubing 2, and the scheme existing in the prior art is adopted.
The innovation point of the embodiment is that: the upper part of the oil pipe hanger 3 is directly connected with the fracturing four-way joint 5 in a threaded manner, and the oil pipe hanger 3 can not rotate in the process of connecting the fracturing four-way joint 5 in a threaded manner.
The method comprises the following steps: the upper side of the oil pipe hanger 3 is provided with a fracturing four-way joint 5, a lower connecting port of the fracturing four-way joint 5 is in threaded sealing connection with the oil pipe hanger 3, so that the whole fracturing channel is in threaded sealing connection, high-pressure fracturing fluid completely bypasses an original wellhead sealing assembly, and the original wellhead sealing assembly is protected from being affected by fracturing.
In order to ensure that the tubing hanger 3 does not rotate when the threaded connection fracturing four-way joint 5 is performed, the upper end of the tubing head 1 is provided with a sealing flange 4, and the sealing flange 4 is in sealing connection with the tubing head 1 through bolts, so that the sealing flange 4 does not rotate. The upper end of the oil pipe hanger 3 passes through the sealing flange 4, the anti-rotation component 12 is arranged between the sealing flange 4 and the oil pipe hanger 3, the anti-rotation component 12 comprises a fixed shaft 10, a shaft sleeve 13, a rotating rod 6 and a movable bolt 7, the fixed shaft 10 is fixedly arranged on the upper end face of the oil pipe hanger 3, the fixed shaft 10 is perpendicular to the upper end face of the oil pipe hanger 3, two shaft sleeves 13 are sleeved on each fixed shaft 10, the two shaft sleeves 13 can rotate relative to the fixed shaft 10, one rotating rod 6 is fixedly connected to each shaft sleeve 13, the rotating rod 6 is perpendicular to the shaft sleeve 13, the movable bolt 7 is perpendicularly arranged with the rotating rod 6, the movable bolt 7 can axially slide relative to the rotating rod 6, the movable bolt 7 can axially slide again, a nut 8 for limiting the movable bolt 7 is connected to the rotating rod 6, blind holes 9 for inserting the movable bolt 7 are formed in the upper end face of the sealing flange 4, the central lines of all the blind holes 9 are located on the same virtual circle at the moment, after the threaded connection of the oil pipe hanger 3 and the lower end of the oil pipe hanger is completed, the relative to the rotating rod 4 is fixedly connected to the rotating rod 6, the anti-rotation component can be prevented from being axially sliding to the movable bolt 7 like the piston 4 when the piston 4 is screwed in the position of the sealing flange 4, and the piston 4 is required to be screwed in the position of the sealing flange 4, and the piston 4 can be prevented from being screwed and the piston 4.
The side connection port of the fracturing four-way valve 5 is of an upward inclined structure, so that the entering angle of fracturing fluid is reduced, and the entering resistance of the fracturing fluid is reduced.
As shown in fig. 3 and 4, the movable bolt 7 is provided with a long hole, the rotating rod 6 is inserted in the long hole, the end part of the rotating rod 6 is hinged with a supporting rod 11, and the supporting rod 11 can be used for supporting the movable bolt 7 after rotating to the upper end, so that when the oil pipe hanger 3 is required to rotate, the movable bolt 7 can be pulled out from the blind hole 9 and supported by the movable bolt 7, and the movable bolt 7 is prevented from falling into the blind hole 9 again.
As shown in fig. 2, the number of blind holes 9 is twice as large as the number of fixed shafts 10, so that the movable pins 7 at the ends of the two rotating rods 6 on the same fixed shaft 10 are respectively inserted into the two blind holes 9 nearest to the fixed shaft 10, so that the bidirectional rotation of the oil pipe hanger 3 can be limited, and therefore, no worry about rotation of the oil pipe hanger 3 is required whether the fracturing four-way 5 is screwed or unscrewed, which is not the technical scheme in the prior art. Of course, the number of blind holes 9 is more than twice the number of the fixed shafts 10, and the function of limiting the bidirectional rotation of the oil pipe hanger 3 by the sealing flange 4 can be realized.
Claims (4)
1. The utility model provides a well head seal protection device for oil well fracturing, includes tubing head (1), tubing hanger (3), and tubing hanger (3) are located tubing head (1), and tubing hanger (3) and tubing head (1) seal fit, and tubing hanger (3)'s lower extreme and tubing (2) screw thread sealing connection, its characterized in that: the upper side of the oil pipe hanger (3) is provided with a fracturing four-way joint (5), a lower connecting port of the fracturing four-way joint (5) is in threaded sealing connection with the oil pipe hanger (3), the upper end of the oil pipe head (1) is provided with a sealing flange (4), the sealing flange (4) is in sealing connection with the oil pipe head (1) through bolts, the upper end of the oil pipe hanger (3) passes through the sealing flange (4), an anti-rotation component (12) is arranged between the sealing flange (4) and the oil pipe hanger (3), the anti-rotation component (12) comprises a fixed shaft (10), a shaft sleeve (13), a rotating rod (6) and a movable plug pin (7), the fixed shaft (10) is fixedly arranged on the upper end face of the oil pipe hanger (3), the fixed shaft (10) is perpendicular to the upper end face of the oil pipe hanger (3), two shaft sleeves (13) are sleeved on each fixed shaft sleeve (10), each shaft sleeve (13) is fixedly connected with one rotating rod (6), the rotating rod (6) is perpendicular to the shaft sleeve (13), the movable plug pin (7) is arranged on the rotating rod (6) and can axially slide relative to the movable plug pin (7) to the movable plug pin (6), the rotating rod (6) is connected with a nut (8) used for limiting the movable bolt (7) in a threaded manner, blind holes (9) for the movable bolt (7) to be inserted are formed in the upper end face of the sealing flange (4), and the central lines of all the blind holes (9) are located on the same virtual circle.
2. The wellhead seal protection device for oil well fracturing according to claim 1, wherein: the side connecting port of the fracturing four-way valve (5) is of an upward inclined structure.
3. The wellhead seal protection device for oil well fracturing according to claim 1, wherein: the movable bolt (7) is provided with a long hole, the rotating rod (6) is inserted in the long hole, the end part of the rotating rod (6) is hinged with a supporting rod (11), and the supporting rod (11) can be used for supporting the movable bolt (7) after rotating to the upper end, so that the lower end of the movable bolt (7) is separated from the blind hole (9).
4. The wellhead seal protection device for oil well fracturing according to claim 1, wherein: the number of the blind holes (9) is twice or more than twice the number of the fixed shafts (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311535553.2A CN117248850B (en) | 2023-11-17 | 2023-11-17 | Wellhead sealing protection device for oil well fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311535553.2A CN117248850B (en) | 2023-11-17 | 2023-11-17 | Wellhead sealing protection device for oil well fracturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117248850A true CN117248850A (en) | 2023-12-19 |
| CN117248850B CN117248850B (en) | 2024-02-20 |
Family
ID=89128052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311535553.2A Active CN117248850B (en) | 2023-11-17 | 2023-11-17 | Wellhead sealing protection device for oil well fracturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117248850B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690221A (en) * | 1986-07-03 | 1987-09-01 | Shell California Production Inc. | Well tubing hanger method and apparatus for use in well control |
| US20040065434A1 (en) * | 2002-10-04 | 2004-04-08 | Bland Linden H. | Tubing rotator |
| CN201650211U (en) * | 2009-10-19 | 2010-11-24 | 重庆新泰机械有限责任公司 | Multifunctional cross |
| CN202055794U (en) * | 2011-04-21 | 2011-11-30 | 丹诺(北京)石油技术服务有限公司 | Whole control simple and easy sleeve head |
| CN202176297U (en) * | 2011-06-16 | 2012-03-28 | 美钻石油钻采系统(上海)有限公司 | Multistage suspension composite type cross joint |
| CN202788725U (en) * | 2012-09-21 | 2013-03-13 | 江苏扬标石油机械有限公司 | Metal hard sealing oil tube head |
| CN205089272U (en) * | 2015-11-15 | 2016-03-16 | 金树怀 | Well head circulator device |
| CN213450307U (en) * | 2020-10-10 | 2021-06-15 | 邓攀 | Oil pipe head with built-in oil pipe hanger |
| CN217602620U (en) * | 2022-03-17 | 2022-10-18 | 陕西延长石油金石钻采设备有限公司 | Oil pipe suspension device |
| CN115288631A (en) * | 2022-08-11 | 2022-11-04 | 江苏宏泰石化机械有限公司 | Flange type oil pipe hanger for oil extraction and gas production wellhead device |
| CN218953274U (en) * | 2022-12-12 | 2023-05-02 | 尔威机械(金湖)有限公司 | Double-pipe tubing head |
-
2023
- 2023-11-17 CN CN202311535553.2A patent/CN117248850B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690221A (en) * | 1986-07-03 | 1987-09-01 | Shell California Production Inc. | Well tubing hanger method and apparatus for use in well control |
| US20040065434A1 (en) * | 2002-10-04 | 2004-04-08 | Bland Linden H. | Tubing rotator |
| CN201650211U (en) * | 2009-10-19 | 2010-11-24 | 重庆新泰机械有限责任公司 | Multifunctional cross |
| CN202055794U (en) * | 2011-04-21 | 2011-11-30 | 丹诺(北京)石油技术服务有限公司 | Whole control simple and easy sleeve head |
| CN202176297U (en) * | 2011-06-16 | 2012-03-28 | 美钻石油钻采系统(上海)有限公司 | Multistage suspension composite type cross joint |
| CN202788725U (en) * | 2012-09-21 | 2013-03-13 | 江苏扬标石油机械有限公司 | Metal hard sealing oil tube head |
| CN205089272U (en) * | 2015-11-15 | 2016-03-16 | 金树怀 | Well head circulator device |
| CN213450307U (en) * | 2020-10-10 | 2021-06-15 | 邓攀 | Oil pipe head with built-in oil pipe hanger |
| CN217602620U (en) * | 2022-03-17 | 2022-10-18 | 陕西延长石油金石钻采设备有限公司 | Oil pipe suspension device |
| CN115288631A (en) * | 2022-08-11 | 2022-11-04 | 江苏宏泰石化机械有限公司 | Flange type oil pipe hanger for oil extraction and gas production wellhead device |
| CN218953274U (en) * | 2022-12-12 | 2023-05-02 | 尔威机械(金湖)有限公司 | Double-pipe tubing head |
Non-Patent Citations (1)
| Title |
|---|
| 申玉壮;高亮;王海涛;: "金属密封油管头在热采井口装置中的应用", 新疆石油天然气, vol. 9, no. 04, 15 December 2013 (2013-12-15), pages 84 - 86 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117248850B (en) | 2024-02-20 |
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