CN110905434B - Electric connection device for wellhead of underwater Christmas tree - Google Patents
Electric connection device for wellhead of underwater Christmas tree Download PDFInfo
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- CN110905434B CN110905434B CN201911221879.1A CN201911221879A CN110905434B CN 110905434 B CN110905434 B CN 110905434B CN 201911221879 A CN201911221879 A CN 201911221879A CN 110905434 B CN110905434 B CN 110905434B
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- wellhead
- hydraulic
- oil production
- connecting hole
- production pipe
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- 241000191291 Abies alba Species 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims description 19
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 32
- 239000010720 hydraulic oil Substances 0.000 description 19
- 239000003129 oil well Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an electric connection device for a wellhead of an underwater Christmas tree, which comprises the wellhead and an oil production pipe, wherein a connection sleeve is arranged at the lower end of the oil production pipe in a threaded manner, a plurality of power cavities and a plurality of transmission cavities are sequentially and annularly arranged in the connection sleeve from bottom to bottom at equal intervals, a motor is fixedly arranged in each power cavity, the lower end of each motor output shaft extends into the transmission cavity, a threaded rod is coaxially welded at the lower end of each motor output shaft, a pressure plug is sleeved on the threaded rod in a threaded manner, the pressure plug is slidably arranged in the transmission cavity, and a porous limiting plate is fixedly arranged in the transmission cavity. According to the invention, the connection between the wellhead and the oil production pipe is more stable and the sealing performance is better through the flat locking mechanism and the push locking mechanism, the unlocking speed of the push locking mechanism is increased through the spring, the unlocking and locking are more convenient and faster and the distance is longer through the control of the motor, and the motor is independently arranged in the power cavity, so that the service life of the device is prolonged.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to an electric connection device for a wellhead of an underwater Christmas tree.
Background
The production tree is a wellhead device for producing petroleum, such as a self-blowing well, a mechanical production well and the like, is a main device for controlling and regulating oil and gas production at the uppermost part of an oil and gas well, and is usually connected with the wellhead of the oil well by a connecting device.
Most of the existing connecting devices adopt a hydraulic linkage mode to lock the Christmas tree and the oil well, but the hydraulic linkage is poor in control effect when the long-distance control is performed, the hydraulic control cost is high, the control speed is low, therefore, the control difficulty needs to be increased by adopting electric control, the common structure of the existing electric control connecting device is wedge-shaped clamping, the structure is complex, a large amount of friction can be caused when the wedge-shaped object is locked and unlocked, and the sealing performance of the wellhead and the Christmas tree is poor due to the fact that the wedge-shaped object can be loosened after long-term use.
Disclosure of Invention
The invention aims to solve the defects of complex structure and poor sealing performance caused by easy looseness in the prior art, and provides an electric connecting device for a wellhead of an underwater Christmas tree.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electric connection device for a wellhead of an underwater Christmas tree comprises the wellhead and an oil production pipe, wherein a connection sleeve is installed at the lower end of the oil production pipe in a threaded mode, a plurality of power cavities and a plurality of transmission cavities are sequentially arranged in the connection sleeve in an annular and equidistant mode from bottom to top, a motor is fixedly installed in each power cavity, the lower end of each motor output shaft extends into the transmission cavity, a threaded rod is coaxially welded at the lower end of each motor output shaft, a pressure plug is sleeved on the threaded rod in a threaded mode, and the pressure plug is installed in the transmission cavity in a sliding mode;
a porous limiting plate is fixedly arranged in the transmission cavity, the lower end of the threaded rod is rotatably inserted in the center of the porous limiting plate, a plurality of flat locking mechanisms and a plurality of push locking mechanisms are respectively embedded in the connecting sleeve, a first connecting hole and a second connecting hole are respectively formed in the inner wall of each transmission cavity, and the first connecting hole and the second connecting hole are respectively connected with the corresponding flat locking mechanism and the corresponding push locking mechanism;
the transmission intracavity is full of hydraulic oil, when the motor rotated, the output shaft of motor drove the threaded rod and rotates, and the threaded rod rotates and makes the pressure plug remove in the transmission intracavity, when the pressure plug moves down, promotes hydraulic oil and compresses down, then can make the hydraulic oil of transmission intracavity impress first connecting hole and second connecting hole drive flat locking mechanism and push locking mechanism action, can control flat locking mechanism and push locking mechanism locking or unblock well head and oil production pipe's connection promptly through the rotation of control motor.
Preferably, the horizontal locking mechanism comprises a hydraulic horizontal groove formed in the side wall of the inner ring of the connecting sleeve, the first connecting hole is communicated with the hydraulic horizontal groove, and an elastic metal sheet is welded at the notch of the hydraulic horizontal groove in a sealing manner;
the hydraulic oil in the transmission cavity enters the hydraulic flat groove through the first connecting hole, the pressure in the hydraulic flat groove is gradually increased, and the elastic metal sheet protrudes out of the hydraulic flat groove due to the gradually increased pressure.
Preferably, a plurality of arc-shaped locking grooves are annularly and equidistantly formed in the outer side wall of the wellhead, and the arc-shaped locking grooves correspond to the elastic metal sheets one to one;
the elastic metal sheet protruding outwards supports in the arc-shaped locking groove, namely the elastic metal sheet is locked into the arc-shaped locking groove to fix the wellhead and the oil production pipe.
Preferably, the push lock mechanism comprises a hydraulic chute arranged in the connecting sleeve, the second connecting hole is communicated with the hydraulic chute, a spring is fixedly arranged at the bottom of the hydraulic chute, one end of the spring, far away from the bottom of the chute, is fixedly connected with a piston, one end of the piston is fixedly provided with a push rod, and one end of the push rod is fixedly provided with a lock head;
in hydraulic oil in the transmission chamber got into hydraulic pressure chute through the second connecting hole, then hydraulic pressure chute internal pressure crescent, then hydraulic oil promoted the piston and outwards slided in hydraulic pressure chute, and the spring is stretched gradually, and the piston outwards slides and then promotes push rod and tapered end and outwards removes, and when hydraulic oil passed through the second connecting hole backward flow in the hydraulic pressure chute, the pressure reduction in the hydraulic pressure chute, spring shrink auxiliary piston, push rod and tapered end reset fast.
Preferably, a plurality of inclined locking grooves are annularly and equidistantly formed in the outer side wall of the wellhead, and the inclined locking grooves correspond to the locking heads one to one;
the lock head is locked into the inclined lock groove after being moved out of the hydraulic inclined groove. The well mouth is firmly connected with the oil production pipe, and the inclined lock head pushes the inclined locking groove on the side wall of the well mouth to enable the connection of the well mouth and the oil production pipe to be tighter, so that the sealing performance of the well mouth and the oil production pipe is improved.
Preferably, the wellhead is clamped at the lower end of the oil production pipe, a sealing ring is fixedly installed on the inner pipe wall of the oil production pipe, and the sealing ring is tightly attached to the wellhead.
The invention has the following beneficial effects:
1. the connecting sleeve is installed on the oil production pipe in a threaded mode, the wellhead and the oil production pipe can be firmly fixed through the connecting sleeve, the connecting sleeve locks and unlocks the wellhead and the oil production pipe through the rotation of the control motor, the motor is controlled to be suitable for long-distance locking and unlocking, the device is simpler in structure, and unlocking and locking operations are convenient.
2. Elastic metal piece seal welding is at the notch of hydraulic pressure straight flute, when needs locking, makes transmission intracavity pressure increase through the control motor to make the hydraulic pressure straight flute internal pressure that is connected through first connecting hole with the transmission chamber increase, then elastic metal piece is extrudeed protrudingly by pressure, and the arc locked groove of bellied elastic metal piece card on the well head lateral wall makes well head and oil production pipe locked, easy operation, and the reaction is rapid.
3. The tapered end shifts out and locks into the inclined lock inslot on the well head lateral wall through the hydraulic pressure chute of slope, and along with the increase of hydraulic pressure chute internal pressure, the tapered end firmly supports tight inclined lock inslot through push rod and piston, further fixes well head and oil production pipe, and the slope is pushed tightly and is made the well head be connected inseparabler with oil production pipe, increases its leakproofness.
4. Fixed mounting has porous limiting plate on the inner wall in transmission chamber, and porous limiting plate avoids the pressure plug to remove when the motor passes through threaded rod control pressure plug and crosses the limit and make the flat groove of hydraulic pressure lose pressure, and can guarantee that the hydraulic oil circulation in the transmission chamber is smooth and easy, and can the fixed threaded rod make it rotate evenly.
5. The spring is fixedly installed in the hydraulic chute, two ends of the spring are respectively fixed on the bottom of the hydraulic chute and the piston, namely when the piston pushes the push rod and the lock head to lock the wellhead, the spring is stretched, and when the lock head is unlocked from the wellhead, the stretched spring can help the piston, the push rod and the lock head to return to the original position quickly, so that the unlocking speed is increased.
6. The motor is arranged in the power intracavity, can avoid the adverse circumstances of oil recovery to cause the influence to it, increases the life of device, and the transmission chamber directly links through first connecting hole and second connecting hole with hydraulic pressure tongue and hydraulic pressure chute respectively for hydraulic control transmission speed is faster.
In conclusion, the connection between the wellhead and the oil production pipe is more stable and the sealing performance is better through the flat locking mechanism and the push locking mechanism, the unlocking speed of the push locking mechanism is increased through the spring, the unlocking and locking are more convenient and faster and the distance is longer through the control of the motor, and the motor is independently arranged in the power cavity, so that the service life of the device is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of an electric connection device at the wellhead of an underwater Christmas tree according to the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
In the figure: 1 wellhead, 2 oil production pipes, 3 connecting sleeves, 4 power chambers, 5 motors, 6 pressure plugs, 7 transmission chambers, 8 porous limiting plates, 9 sealing rings, 10 arc-shaped locking grooves, 11 oblique locking grooves, 12 threaded rods, 13 first connecting holes, 14 second connecting holes, 15 hydraulic oblique grooves, 16 springs, 17 pistons, 18 push rods, 19 locking heads, 20 hydraulic flat grooves and 21 elastic metal sheets.
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.
Referring to fig. 1-2, an electric connection device for a wellhead of an underwater Christmas tree comprises a wellhead 1 and an oil production pipe 2, wherein a connection sleeve 3 is installed at the lower end of the oil production pipe 2 through threads, a plurality of power cavities 4 and a plurality of transmission cavities 7 are sequentially arranged in the connection sleeve 3 from bottom to bottom in an annular and equidistant manner, a motor 5 is fixedly installed in each power cavity 4, the lower end of an output shaft of each motor 5 extends into the transmission cavity 7, a threaded rod 12 is coaxially welded at the lower end of the output shaft of each motor 5, a pressure plug 6 is sleeved on the threaded rod 12 through threads, and the pressure plug 6 is slidably installed in the transmission cavity 7;
a porous limiting plate 8 is fixedly arranged in the transmission cavity 7, the lower end of the threaded rod 12 is rotatably inserted in the center of the porous limiting plate 8, a plurality of flat locking mechanisms and a plurality of push locking mechanisms are respectively embedded in the connecting sleeve 3, a first connecting hole 13 and a second connecting hole 14 are respectively formed in the inner wall of each transmission cavity 7, and the first connecting hole 13 and the second connecting hole 14 are respectively connected with the corresponding flat locking mechanism and the corresponding push locking mechanism;
the transmission chamber 7 is filled with hydraulic oil, when the motor 5 rotates, the output shaft of the motor 5 drives the threaded rod 12 to rotate, the threaded rod 12 rotates to enable the pressure plug 6 to move in the transmission chamber 7, when the pressure plug 6 moves downwards, the hydraulic oil is pushed to be compressed downwards, the hydraulic oil in the transmission chamber 7 can be enabled to be pressed into the first connecting hole 13 and the second connecting hole 14 to drive the flat locking mechanism and the push locking mechanism to move, namely, the flat locking mechanism and the push locking mechanism can be controlled to lock or unlock the connection between the wellhead 1 and the oil production pipe 2 through the rotation of the control motor 5.
The horizontal locking mechanism comprises a hydraulic horizontal groove 20 formed in the side wall of the inner ring of the connecting sleeve 3, the first connecting hole 13 is communicated with the hydraulic horizontal groove 20, and an elastic metal sheet 21 is welded at the notch of the hydraulic horizontal groove 20 in a sealing mode;
the hydraulic oil in the transmission chamber 7 enters the hydraulic flat groove 20 through the first connection hole 13, the pressure in the hydraulic flat groove 20 is gradually increased, and the elastic metal sheet 21 protrudes out of the hydraulic flat groove 20 due to the gradually increased pressure.
A plurality of arc-shaped locking grooves 10 are annularly and equidistantly formed in the outer side wall of the wellhead 1, and the plurality of arc-shaped locking grooves 10 correspond to the plurality of elastic metal sheets 21 one by one;
the elastic metal sheet 21 protruding outwards abuts against the arc-shaped locking groove 10, namely the elastic metal sheet 21 is locked into the arc-shaped locking groove 10 to fix the wellhead 1 and the oil production pipe 2.
The push locking mechanism comprises a hydraulic chute 15 arranged in the connecting sleeve 3, the second connecting hole 14 is communicated with the hydraulic chute 15, a spring 16 is fixedly arranged at the bottom of the hydraulic chute 15, one end, far away from the bottom of the hydraulic chute 16, of the spring 16 is fixedly connected with a piston 17, one end of the piston 17 is fixedly provided with a push rod 18, and one end of the push rod 18 is fixedly provided with a lock head 19;
the hydraulic oil in the transmission cavity 7 enters the hydraulic chute 15 through the second connecting hole 14, the pressure in the hydraulic chute 15 is gradually increased, the hydraulic oil pushes the piston 17 to slide outwards in the hydraulic chute 15, the spring 16 is gradually stretched, the piston 17 slides outwards to push the push rod 18 and the lock head 19 to move outwards, when the hydraulic oil in the hydraulic chute 15 flows back through the second connecting hole 14, the pressure in the hydraulic chute 15 is reduced, and the spring 16 contracts to assist the piston 17, the push rod 18 and the lock head 19 to reset quickly.
A plurality of inclined locking grooves 11 are annularly and equidistantly formed in the outer side wall of the wellhead 1, and the inclined locking grooves 11 correspond to the locking heads 19 one by one;
the locking head 19 is moved out of the hydraulic chute 15 and then locked into the inclined locking groove 11. The well head 1 is firmly connected with the oil production pipe 2, and the inclined lock head 19 pushes the inclined lock groove 11 on the side wall of the well head 1 to enable the connection between the well head 1 and the oil production pipe 2 to be tighter, so that the sealing performance is improved.
The well head 1 is clamped at the lower end of the oil production pipe 2, the inner pipe wall of the oil production pipe 2 is fixedly provided with a sealing ring 9, and the sealing ring 9 is tightly attached to the well head 1.
When the invention is used, the connecting sleeve 3 is installed at the lower end of the oil production pipe in a threaded manner, then the lower end of the connecting sleeve 3 is sleeved on the wellhead 1, the wellhead 1 is clamped with the oil production pipe 2, then the motor 5 is controlled to rotate, the motor 5 rotates the threaded rod 12 through the output shaft, the threaded rod 12 rotates to push the pressure plug 6 downwards in the transmission cavity 7, the pressure at the lower end of the transmission cavity 7 is increased, the hydraulic oil in the transmission cavity 7 is respectively pressed into the hydraulic flat groove 20 and the hydraulic inclined groove 15 from the first connecting hole 13 and the second connecting hole 14, the pressure in the hydraulic flat groove 20 is increased due to the increase of the hydraulic oil, the pressure makes the elastic metal sheet 21 bulge outwards and abut against the arc-shaped locking groove 10 on the side wall of the wellhead 1, the hydraulic oil in the hydraulic inclined groove 15 pushes the piston 17 to move outwards, the spring 16 stretches, the piston 17 pushes the push rod 18 and the locking head 19 to move outwards, and is finally inserted into the inclined locking groove 11 on the side wall of the wellhead 1, the elastic metal sheet 21 is clamped into the arc-shaped locking groove 10 and the lock head 19 is locked into the inclined locking groove 11 to firmly fix the wellhead 1 and the oil production pipe 2 to complete locking;
during the unblock, control motor 5 counter rotation, pressure stopper 6 moves up through the rotation of threaded rod 12, and then hydraulic oil is retrieved through first connecting hole 13 and second connecting hole 14 by transmission chamber 7 for hydraulic pressure plain groove 20 and hydraulic chute 15 internal pressure reduce gradually, then elastic metal piece 21 reconversion, and the tapered end 19 is pulled into hydraulic chute 15 by piston 17 and push rod 18 fast under the restoration of spring 16 in, accomplishes the unblock.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The electric connecting device for the wellhead of the underwater Christmas tree comprises a wellhead (1) and an oil production pipe (2), and is characterized in that a connecting sleeve (3) is installed on the lower end thread of the oil production pipe (2), a plurality of power cavities (4) and a plurality of transmission cavities (7) are sequentially arranged in the connecting sleeve (3) in an annular and equidistant mode from bottom to top, a motor (5) is fixedly installed in each power cavity (4), the lower end of an output shaft of each motor (5) extends into each transmission cavity (7), a threaded rod (12) is coaxially welded to the lower end of the output shaft of each motor (5), a pressure plug (6) is sleeved on the upper thread of the threaded rod (12), and the pressure plug (6) is slidably installed in each transmission cavity (7);
a porous limiting plate (8) is fixedly installed in the transmission cavity (7), the lower end of the threaded rod (12) is rotatably inserted into the center of the porous limiting plate (8), a plurality of horizontal locking mechanisms and a plurality of push locking mechanisms are respectively installed in the connecting sleeve (3) in an embedded mode, a first connecting hole (13) and a second connecting hole (14) are respectively formed in the inner wall of each transmission cavity (7), and the first connecting hole (13) and the second connecting hole (14) are respectively connected with the corresponding horizontal locking mechanism and the corresponding push locking mechanism;
the horizontal locking mechanism comprises a hydraulic horizontal groove (20) formed in the side wall of the inner ring of the connecting sleeve (3), the first connecting hole (13) is communicated with the hydraulic horizontal groove (20), and an elastic metal sheet (21) is welded at the notch of the hydraulic horizontal groove (20) in a sealing mode;
push away locking mechanism including offering hydraulic pressure chute (15) in adapter sleeve (3), and second connecting hole (14) intercommunication hydraulic pressure chute (15), the tank bottom fixed mounting of hydraulic pressure chute (15) has spring (16), one end fixedly connected with piston (17) of tank bottom are kept away from in spring (16), the one end fixed mounting of piston (17) has push rod (18), the one end fixed mounting of push rod (18) has tapered end (19).
2. The electric connection device for the wellhead of the underwater Christmas tree according to claim 1, wherein a plurality of arc-shaped locking grooves (10) are formed in the outer side wall of the wellhead (1) in an annular and equidistant mode, and the plurality of arc-shaped locking grooves (10) correspond to the plurality of elastic metal sheets (21) one by one.
3. The electric connection device for the wellhead of the underwater Christmas tree according to claim 1, wherein a plurality of inclined locking grooves (11) are formed in the outer side wall of the wellhead (1) in an annular and equidistant mode, and the plurality of inclined locking grooves (11) correspond to the plurality of locking heads (19) one by one.
4. The electric wellhead connecting device for the subsea tree according to claim 1, characterized in that the wellhead (1) is clamped at the lower end of the oil production pipe (2), the inner pipe wall of the oil production pipe (2) is fixedly provided with a sealing ring (9), and the sealing ring (9) is tightly attached to the wellhead (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221879.1A CN110905434B (en) | 2019-12-03 | 2019-12-03 | Electric connection device for wellhead of underwater Christmas tree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221879.1A CN110905434B (en) | 2019-12-03 | 2019-12-03 | Electric connection device for wellhead of underwater Christmas tree |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110905434A CN110905434A (en) | 2020-03-24 |
| CN110905434B true CN110905434B (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911221879.1A Active CN110905434B (en) | 2019-12-03 | 2019-12-03 | Electric connection device for wellhead of underwater Christmas tree |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366970A (en) * | 1980-08-15 | 1983-01-04 | Hogan Jr Robert J | Theft prevention method and apparatus for wellheads |
| CN102003157A (en) * | 2010-12-10 | 2011-04-06 | 中国石油大学(北京) | Subsea wellhead connector |
| CN206016748U (en) * | 2016-08-10 | 2017-03-15 | 北京市地质工程勘察院 | Monitor tree-protector in underground |
| CN206309329U (en) * | 2016-12-28 | 2017-07-07 | 上海神开石油化工装备股份有限公司 | It is a kind of for underwater well head and the connector of production tree |
| CN108678701A (en) * | 2018-05-15 | 2018-10-19 | 中国石油大学(华东) | The electronic wellhead connector of underwater complete electric production tree |
| CN109973032A (en) * | 2019-03-24 | 2019-07-05 | 西南石油大学 | A kind of monocline block spring leaf brace type coiled tubing traction robot |
-
2019
- 2019-12-03 CN CN201911221879.1A patent/CN110905434B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366970A (en) * | 1980-08-15 | 1983-01-04 | Hogan Jr Robert J | Theft prevention method and apparatus for wellheads |
| CN102003157A (en) * | 2010-12-10 | 2011-04-06 | 中国石油大学(北京) | Subsea wellhead connector |
| CN206016748U (en) * | 2016-08-10 | 2017-03-15 | 北京市地质工程勘察院 | Monitor tree-protector in underground |
| CN206309329U (en) * | 2016-12-28 | 2017-07-07 | 上海神开石油化工装备股份有限公司 | It is a kind of for underwater well head and the connector of production tree |
| CN108678701A (en) * | 2018-05-15 | 2018-10-19 | 中国石油大学(华东) | The electronic wellhead connector of underwater complete electric production tree |
| CN109973032A (en) * | 2019-03-24 | 2019-07-05 | 西南石油大学 | A kind of monocline block spring leaf brace type coiled tubing traction robot |
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| Publication number | Publication date |
|---|---|
| CN110905434A (en) | 2020-03-24 |
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Effective date of registration: 20211231 Address after: 257029 No. 56, Quanzhou Road, Dongying District, Dongying City, Shandong Province Applicant after: DONGYING EAST MACHINERY MANUFACTURE CO.,LTD. Address before: 710000 room 810, 8 floor, Chong Chuang Plaza, 385 space Road, Xi'an, Shaanxi. Applicant before: Feng Meihan |
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