CN110700787B - Wellhead torque slow-release back-off protection device and method and special torsion-proof rod - Google Patents
Wellhead torque slow-release back-off protection device and method and special torsion-proof rod Download PDFInfo
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- CN110700787B CN110700787B CN201810755751.2A CN201810755751A CN110700787B CN 110700787 B CN110700787 B CN 110700787B CN 201810755751 A CN201810755751 A CN 201810755751A CN 110700787 B CN110700787 B CN 110700787B
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- telescopic rod
- torsion
- cross beam
- lower cross
- wellhead
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- 238000000034 method Methods 0.000 title abstract description 6
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a wellhead torque slow-release back-off protection device and method and a special torsion prevention rod. The anti-torsion rod comprises an anti-reversing flange, a telescopic rod and a telescopic rod sleeve, the front end of the telescopic rod sleeve is connected with the anti-reversing flange, the telescopic rod is screwed into the telescopic rod sleeve from the rear end of the telescopic rod sleeve, an external thread is formed on the telescopic rod, an internal thread is formed on the telescopic rod sleeve, the anti-reversing flange is fixed on the lower cross beam through a bolt, and a fixing hole used for connecting a ground anchor is formed in the rear end of the telescopic rod. The invention prevents the loosening of the screw thread of the sleeve head and the flange under the wellhead caused by the overlarge forward and reverse rotation torque of the drill plate.
Description
Technical Field
The invention relates to petroleum exploitation well operation equipment, in particular to a wellhead torque slow-release back-off protection device and method and a special torsion prevention rod.
Background
When the oil-water well minor repair operation is carried out on drilling plug, sleeve milling and fishing, the drilling tool needs to be driven to rotate through a hydraulic drilling disk, the drilling disk is connected to a wellhead cross joint, a lower flange of the cross joint is arranged on the lower portion of the cross joint and is connected with a casing head through a casing nipple screw thread, in the fishing and thread making process, the drilling disk rotates to drive the drilling tool to rotate, the drilling tool is driven to rotate, in order to prevent the drilling disk from rotating forward and backward, the rotating speed is out of control, the casing head and the lower flange screw thread of the wellhead are disconnected, potential safety hazards exist, the wellhead torque is required to be slowly released, and a device for protecting the back-off.
Through retrieval, a technical scheme similar to the disclosure of the application is not found.
Disclosure of Invention
The invention aims to provide a wellhead torque slow-release back-off protection device and method and a special torsion-proof rod, which prevent the loosening of a sleeve head and a wellhead lower flange screw thread caused by the overlarge forward and reverse rotation torque of a drill plate.
In order to achieve the purpose, the technical scheme is that the wellhead torque slow-release back-off protection device comprises a torsion preventing bar, a lower cross beam and a ground anchor, wherein the front end of the torsion preventing bar is fixedly connected with the lower cross beam, the rear end of the torsion preventing bar is connected with the upper end of the ground anchor, and the lower cross beam simultaneously fixes a casing four-way joint and a shell of a hydraulic drill plate.
The anti-torsion rod comprises an anti-reversing flange, a telescopic rod and a telescopic rod sleeve, the front end of the telescopic rod sleeve is connected with the anti-reversing flange, the telescopic rod is screwed into the telescopic rod sleeve from the rear end of the telescopic rod sleeve, an external thread is formed on the telescopic rod, an internal thread is formed on the telescopic rod sleeve, the anti-reversing flange is fixed on the lower cross beam through a bolt, and a fixing hole used for connecting a ground anchor is formed in the rear end of the telescopic rod.
The lower end of the ground anchor is anchored into the ground, and the upper end of the ground anchor is fixed in a fixing hole in the rear end of the telescopic rod through a fixing piece.
The fixing piece is a pin or a steel wire rope.
And a through hole is formed in the middle of the lower cross beam, the lower end of the hydraulic drill plate shell and the upper end of the sleeve four-way joint are sleeved by the through hole, and the hydraulic drill plate shell and the sleeve four-way joint are fixed on the lower cross beam by bolts.
The two torsion preventing bars are respectively connected with the lower cross beam, and in an overlooking state, the directions of the two torsion preventing bars are opposite and are vertical to the central axis of the lower cross beam.
In order to achieve the purpose, the invention adopts the following technical scheme that the front end of a torsion-proof rod is fixedly connected with a lower cross beam, the rear end of the torsion-proof rod is connected with the upper end of a ground anchor, the lower cross beam simultaneously fixes a casing four-way and a shell of a hydraulic drill disk, when the hydraulic drill disk drives a rod column to rotate under the power of a hydraulic source, the ground anchor stops the rotation of the torsion-proof rod due to the fixed ground anchor, the rotation of the lower cross beam is further stopped by the torsion-proof rod, and the lower cross beam simultaneously fixes the casing four-way and the shell of the hydraulic drill disk, so that the lower cross beam can slowly release the torque of the hydraulic drill disk and eliminate the back-off effect.
In order to achieve the purpose, the invention adopts the following technical scheme that the special anti-torsion rod for the wellhead torque slow-release back-off protection device comprises an anti-reversing flange, a telescopic rod and a telescopic rod sleeve, wherein the front end of the telescopic rod sleeve is connected with the anti-reversing flange, the telescopic rod is screwed into the telescopic rod sleeve from the rear end port of the telescopic rod sleeve, the telescopic rod is provided with an external thread, the telescopic rod sleeve is provided with an internal thread, the anti-reversing flange is fixed on the lower cross beam through a bolt, and the rear end of the telescopic rod is provided with a fixing hole for connecting a ground anchor.
Compared with the prior art, the invention has the following beneficial effects:
the anti-reversing flange is connected with the lower cross beam through the bolt, the end part of the telescopic rod is connected with the ground anchor for anchoring, and the lower cross beam is fixed, so that the whole wellhead four-way joint is fixed, and the condition that a casing head and a wellhead lower flange thread are loosened due to overlarge forward and reverse rotation torque of the drill plate is prevented. The anti-loosening function of the sleeve head and the flange screw thread under the wellhead can be realized. Can meet the anchoring requirements under different well site conditions. The device is convenient to operate on site and convenient to disassemble and maintain.
Drawings
FIG. 1 is a schematic structural diagram of a wellhead torque slow-release back-off protection device in use according to the present invention;
FIG. 2 is a schematic top view of the torsion bar and the lower cross member;
fig. 3 is a schematic structural view of the torsion prevention bar.
In the figure: the anti-torsion rod 1, the lower cross beam 2, the ground anchor 3, the hydraulic drill plate 4, the sleeve four-way joint 5 and the fixing piece 6;
the anti-reverse flange is 1-1, the telescopic rod is 1-2, the telescopic rod sleeve is 1-3, the fixing hole is 1-4, the through hole is 2-1, and the bolt is 2-2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: a well mouth torque slow-release back-off protection device comprises a torsion prevention bar 1, a lower cross beam 2 and a ground anchor 3, wherein the front end of the torsion prevention bar 1 is fixedly connected with the lower cross beam 2, the rear end of the torsion prevention bar is connected with the upper end of the ground anchor 3, and the lower cross beam simultaneously fixes a casing four-way joint 5 and a shell of a hydraulic drill plate 4. The anti-torsion rod comprises an anti-reversing flange 1-1, a telescopic rod 1-2 and a telescopic rod sleeve 1-3, the front end of the telescopic rod sleeve is connected with the anti-reversing flange, the telescopic rod is screwed into the telescopic rod sleeve from the rear end of the telescopic rod sleeve, the telescopic rod is provided with external threads, the telescopic rod sleeve is provided with internal threads, the anti-reversing flange is fixed on the lower cross beam through bolts, and the rear end of the telescopic rod is provided with a fixing hole 1-4 for connecting a ground anchor. The lower end of the ground anchor is anchored into the ground, and the upper end of the ground anchor is fixed in a fixing hole at the rear end of the telescopic rod through a fixing piece 6. The fixing piece is a pin or a steel wire rope. The middle part of the lower cross beam is provided with a through hole 2-1 which sleeves the lower end part of the hydraulic drill plate shell and the upper end part of the sleeve four-way joint at the same time, the through hole is aligned with a hydraulic drill plate bolt hole and a sleeve four-way bolt hole at the same time, and the hydraulic drill plate shell and the sleeve four-way joint are fixed on the lower cross beam at the same time through bolts 2-2. The two torsion preventing bars are respectively connected with the lower cross beam, and in an overlooking state, the directions of the two torsion preventing bars are opposite and are vertical to the central axis of the lower cross beam.
The anti-torsion bar consists of an anti-reversing flange 1-1, a telescopic rod 1-2 and a telescopic rod sleeve 1-3, wherein the anti-reversing flange 1-1 is provided with four threaded holes which can be connected and fastened with the lower cross beam; the outer wall of the telescopic rod 1-2 and the inner wall of the telescopic rod sleeve 1-3 are provided with threads, and the two can rotate, so that the screwing-out length of the telescopic rod is changed.
The connection mode of the torsion-proof bars and the lower cross beam is shown in the attached drawing 2, and meanwhile, two sets of torsion-proof bars are required to be matched with the lower cross beam 2 for use and are connected with each other through bolts.
During operation, as shown in the attached figure 3, two torsion preventing bars are fixed on the lower cross beam 2 through bolts, and then the end parts of the torsion preventing bars are connected with the ground anchor 3 through pins or steel wire ropes.
The working principle is as follows: the hydraulic drill plate 4 drives the rod column to rotate under the power of a hydraulic source, and when the forward and reverse torque of the drill plate is too large, the situation that the casing head and a flange screw thread under a wellhead are detached easily is caused. The hydraulic drill plate 4 and the sleeve four-way joint 5 are connected to the lower cross beam 2 by bolts 2-2, so that the torque of the hydraulic drill plate 4 can be slowly released after the lower cross beam 2 is anchored firmly, and the back-off effect is eliminated. The torsion-proof rod is fixed on the lower cross beam 2 through a bolt, the end part of the torsion-proof rod is connected with the ground anchor 3 through a pin or a steel wire rope, the anchoring of the lower cross beam through the ground anchor realizes the anchoring of the whole wellhead device, and further the anti-loosening function of the sleeve head and the lower flange screw thread of the wellhead is realized. According to the specific well site conditions, the length of the telescopic rod 1-2 which is screwed out of the telescopic rod sleeve 1-3 can be adjusted by rotating the telescopic rod, so that the anchoring of the ground anchor is facilitated, and the anchoring requirements of different well sites can be met. Each joint is fastened by bolts, pins or steel wire ropes, so that the device is convenient to assemble and disassemble, simple in structure and convenient to maintain and operate.
In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A well mouth torque slow-release back-off protection device is characterized by comprising a torsion-proof bar, a lower cross beam and a ground anchor, wherein the front end of the torsion-proof bar is fixedly connected with the lower cross beam, the rear end of the torsion-proof bar is connected with the upper end of the ground anchor, and the lower cross beam simultaneously fixes a casing four-way joint and a shell of a hydraulic drill plate; the anti-torsion rod comprises an anti-reversing flange, a telescopic rod and a telescopic rod sleeve, the front end of the telescopic rod sleeve is connected with the anti-reversing flange, the telescopic rod is screwed into the telescopic rod sleeve from the rear end of the telescopic rod sleeve, an external thread is formed on the telescopic rod, an internal thread is formed on the telescopic rod sleeve, the anti-reversing flange is fixed on the lower cross beam through a bolt, and a fixing hole used for connecting a ground anchor is formed in the rear end of the telescopic rod.
2. The wellhead torque slow-release back-off protection device as claimed in claim 1, wherein the lower end of the ground anchor is anchored into the ground, and the upper end of the ground anchor is fixed in a fixing hole at the rear end of the telescopic rod through a fixing member.
3. The wellhead torque slow-release back-off protection device as claimed in claim 2, wherein a through hole is formed in the middle of the lower cross beam, the through hole is sleeved on the lower end of the hydraulic drill plate shell and the upper end of the casing four-way joint at the same time, and the hydraulic drill plate shell and the casing four-way joint are fixed on the lower cross beam at the same time through bolts.
4. The wellhead torque slow-release back-off protection device according to claim 1, wherein two torsion prevention bars are arranged and are respectively connected with the lower cross beam, and in a top view state, the two torsion prevention bars are opposite in direction and are perpendicular to the central axis of the lower cross beam.
5. The utility model provides a dedicated anti-torsion rod of well head moment of torsion slowly-releasing back-off protection device which characterized in that, is including preventing down-turning flange, telescopic link cover, the down-turning flange is connected to telescopic link cover front end, the telescopic link is in port screw in telescopic link cover behind the telescopic link cover, and wherein the external screw thread is seted up to the telescopic link, and the internal thread is seted up to the telescopic link cover, prevent down-turning flange and pass through the bolt fastening on the bottom end rail, the fixed orifices that is used for connecting the earth anchor is seted up to the telescopic link rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810755751.2A CN110700787B (en) | 2018-07-10 | 2018-07-10 | Wellhead torque slow-release back-off protection device and method and special torsion-proof rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810755751.2A CN110700787B (en) | 2018-07-10 | 2018-07-10 | Wellhead torque slow-release back-off protection device and method and special torsion-proof rod |
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| Publication Number | Publication Date |
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| CN110700787A CN110700787A (en) | 2020-01-17 |
| CN110700787B true CN110700787B (en) | 2021-05-28 |
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| CN201810755751.2A Active CN110700787B (en) | 2018-07-10 | 2018-07-10 | Wellhead torque slow-release back-off protection device and method and special torsion-proof rod |
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| CN (1) | CN110700787B (en) |
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| CN101846239B (en) * | 2010-04-23 | 2012-11-21 | 自贡力源科技有限公司 | Reinforcing device for underground gas storage well of high-pressure fuel gas and reinforcing and processing method |
| CN201963233U (en) * | 2011-03-03 | 2011-09-07 | 中国石油天然气股份有限公司 | Wellhead flange back-off device |
| CN202300297U (en) * | 2011-10-27 | 2012-07-04 | 中国石油天然气集团公司 | Fixing base for blowout preventer group |
| US9879396B2 (en) * | 2013-06-24 | 2018-01-30 | Trendsetter Vulcan Offshore, Inc. | Systems and methods for tethering subsea structure mounted on a wellhead |
| CN103993839B (en) * | 2014-05-28 | 2016-05-25 | 中国石油集团东方地球物理勘探有限责任公司 | A kind of seismic prospecting light rig and process |
| CN205776364U (en) * | 2016-05-31 | 2016-12-07 | 黄永光 | A kind of ground anchor type wellhead safety anti-theft preventer |
| CN108119089A (en) * | 2017-11-24 | 2018-06-05 | 中国石油天然气集团公司 | Prevent the devices and methods therefor of tubing string play |
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2018
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Patent Citations (3)
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| CN105484223A (en) * | 2016-01-11 | 2016-04-13 | 江苏中设集团股份有限公司 | Load testing device for ultra-deep layer screw plate |
| CN105507226A (en) * | 2016-01-28 | 2016-04-20 | 铁道第三勘察设计院集团有限公司 | Method for eliminating impacts of dowel bar bending on accuracy of spiral plate load test and displacement detector used in same |
| CN105699195A (en) * | 2016-01-28 | 2016-06-22 | 铁道第三勘察设计院集团有限公司 | Screw plate deep load test system based on geotechnical engineering in-situ rotating touch detector and use method thereof |
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| CN110700787A (en) | 2020-01-17 |
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