CN112096334B - Combined production tree for production well - Google Patents
Combined production tree for production well Download PDFInfo
- Publication number
- CN112096334B CN112096334B CN202011226751.7A CN202011226751A CN112096334B CN 112096334 B CN112096334 B CN 112096334B CN 202011226751 A CN202011226751 A CN 202011226751A CN 112096334 B CN112096334 B CN 112096334B
- Authority
- CN
- China
- Prior art keywords
- sealing
- connector
- connecting body
- valve
- fixedly connected
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 239000012188 paraffin wax Substances 0.000 claims abstract description 32
- 241000191291 Abies alba Species 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 6
- 239000001993 wax Substances 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 7
- 238000000605 extraction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B33/02—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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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)
- Geophysics (AREA)
- Gasket Seals (AREA)
Abstract
The invention provides a combined Christmas tree for a Christmas well, and relates to the field of Christmas tree equipment. This combination formula production tree for producing well, which comprises a body, there is the connector at the top middle part of body through flange joint, the top middle part fixedly connected with top sealing member of connector, top sealing member passes through the paraffin removal lid on the fixation nut fixedly connected with, the lower extreme middle part of connector is provided with the main valve door, one side at body lower extreme middle part is provided with seal assembly, middle part opposite side lateral wall is provided with a groove in the body lower extreme. Through closing the main valve door, open the sealed gate of second and make the pressure in the connector slowly descend from the second delivery pipe, simultaneously through the block of positioning bolt and constant head tank, avoid the paraffin wax cover to collapse away by gas and cause the incident, realize safety in production, the one end through the seal pin closely laminates in the apical trough, and the part is simple, realizes the effectual sealed of production tree, is worth wideling popularize.
Description
Technical Field
The invention relates to the technical field of Christmas tree equipment, in particular to a combined type Christmas tree for an oil production well.
Background
The Christmas tree is a wellhead device for producing petroleum, such as a self-blowing well, a mechanical production well and the like, is main equipment for controlling and regulating oil and gas production at the uppermost part of an oil and gas well, and mainly comprises a casing head, a tubing head and a Christmas tree body.
Because the inside atmospheric pressure of production tree is higher than air pressure far away, even detect that the inside atmospheric pressure of production tree is very low, open the relevant part of production tree, also cause the part to break out very likely, can cause the incident very likely, when the production tree does not use simultaneously, need sealing member or the valve that the quality is very fine now to seal the production tree, not only can increase the part cost, the part increases simultaneously still can indirectly play opposite effect to the sealed effect of production tree.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a combined Christmas tree for an oil production well, which solves the problems of troublesome cleaning of the Christmas tree and poor sealing effect.
In order to achieve the purpose, the invention is realized by the following technical scheme: a combined Christmas tree for an oil extraction well comprises a body, wherein the middle part of the top end of the body is connected with a connecting body through a connecting flange, the vertical direction and the horizontal direction of the middle part in the body are communicated and arranged to be hollow, the vertical direction and the horizontal direction of the middle part in the connecting body are communicated and arranged to be hollow, the body and the connecting body are communicated, the middle part of the top end of the connecting body is fixedly connected with a top sealing element, the top sealing element is fixedly connected with an upper paraffin removal cover through fixing nuts, the six fixing nuts are uniformly distributed in the upper paraffin removal cover, the middle part of the lower end of the connecting body is provided with a main valve, one side of the middle part of the lower end of the body is provided with a sealing assembly, the other side wall of the middle part in the lower end of the body is provided with a top groove, one side of the middle part of the body is provided with a first valve, one side of the body is connected with a first connecting seat through a flange, the one end fixedly connected with first output tube that the body was kept away from to first connecting seat, the middle part opposite side of body is provided with the second valve, and the opposite side flange joint of body has the second seal receptacle, the one side that the body was kept away from to the second seal receptacle is provided with down the manometer.
Preferably, the lower part of going up the paraffin removal lid extends to the upper portion in the connector, the middle part of going up the paraffin removal lid is provided with the constant head tank, the lower extreme from the top down of going up the paraffin removal lid is provided with two the same seal grooves, all be provided with rubber seal in the seal groove, rubber seal all hugs closely the inner wall at the connector.
Preferably, the top sealing element is annular, six positioning bolts are uniformly distributed in the middle of the top sealing element, and the ends close to the positioning bolts are clamped in the positioning grooves.
Preferably, seal assembly's interior middle part is provided with the spout, the inside intercommunication of spout and body, sliding connection has the seal pin in the spout, the one end of seal pin is just to the overhead tank, the other end middle part fixedly connected with slide bar of seal pin, the one end that the seal pin was kept away from to the slide bar is rotated and is connected with the screw rod, the screw rod runs through seal assembly's lateral wall and extends.
Preferably, the lower end of the body is connected with an oil pipe through a connecting flange, and the lower end of the oil pipe is arranged in an oil well.
The working principle is as follows: when the combined Christmas tree for the oil well is used, if a plurality of substances precipitated and solidified in oil are adhered in an oil pipe, the normal operation of oil extraction is influenced, at this time, the main valve is closed, the pressure value in the connecting body is seen through the upper pressure gauge after the main valve is closed, at this time, the pressure in the connecting body is slowly reduced from the second output pipe by slowly opening the second sealing gate, after the pressure in the connecting pipe is seen to approach to the air pressure through the upper pressure gauge, the upper paraffin removal cover is loosened by detaching the fixing nut, meanwhile, if the air pressure exists in the connecting body, the air pressure can be discharged along with the gaps in the upper paraffin removal cover and the connecting seat, meanwhile, the upper paraffin removal cover is prevented from being broken away by air through the clamping of the positioning bolt and the positioning groove when the air is discharged, meanwhile, the main valve is slowly opened, the circulation of the air is realized, and simultaneously, the impurities deposited in the oil pipe can be well and safely removed, realize safety in production, when the production tree seals, at first, make the slide bar promote sealed round pin through twisting the screw rod, sealed round pin slides in the spout, the one end of sealed round pin closely laminates in the overhead tank, realize the effectual sealing of first layer of production tree, still can not lead to the production tree to seal up poorly because seal part is too numerous and diverse simultaneously, through first valve, the closing of second valve and main valve, realize the sealed of production tree second floor, the sealed setting in second floor realizes that the production tree has very good sealed effect, simultaneously through last manometer and the numerical value of manometer down, can be fine detect the leakproofness of production tree, the adjustment seal assembly that the production tree of being convenient for can be timely, be worth wideling popularize.
The invention provides a combined Christmas tree for a Christmas well. The method has the following beneficial effects:
1. according to the invention, the main valve is closed, the pressure value in the connecting body is seen through the upper pressure gauge after the main valve is closed, the pressure in the connecting body is slowly reduced from the second output pipe by opening the second sealing gate, the pressure value of the upper pressure gauge approaches to the air pressure, the fixing nut is dismounted to loosen the upper paraffin removal cover, the redundant air pressure in the connecting body can be discharged from the gap between the upper paraffin removal cover and the connecting seat, meanwhile, the safety accident caused by the collapse of the upper paraffin removal cover by air is avoided by the clamping of the positioning bolt and the positioning groove, the main valve is slowly opened to circulate the air, the impurity removal operation can be safely carried out, and the safe production is realized.
2. According to the invention, the screw rod is screwed to enable the sliding rod to push the sealing pin, the sealing pin slides in the sliding groove, one end of the sealing pin is tightly attached to the top groove, effective sealing of a first layer of the Christmas tree is realized, poor sealing effect of the Christmas tree due to too complicated sealing parts is avoided, sealing of a second layer of the Christmas tree is realized by closing the first valve, the second valve and the main valve, the second layer of sealing is arranged to enable the Christmas tree to have good sealing effect, sealing of the Christmas tree can be well detected through values of the upper pressure gauge and the lower pressure gauge, a sealing assembly can be timely adjusted conveniently by the Christmas tree, and the device is worthy of popularization.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic plan view of the wax cover of the present invention;
FIG. 3 is a perspective view of the top seal of the present invention;
fig. 4 is an enlarged view of a point a in fig. 1.
Wherein, 1, a first valve; 2. a first output pipe; 3. a first connecting seat; 4. a linker; 5. a first sealing valve; 6. a first seal seat; 7. a pressure gauge is arranged; 8. a top seal; 9. covering a paraffin removal cover; 10. a second sealing valve; 11. a second output pipe; 12. a second connecting seat; 13. a main valve; 14. a second seal seat; 15. a lower pressure gauge; 16. a second valve; 17. a body; 18. a connecting flange; 19. an oil pipe; 20. fixing a nut; 21. positioning a groove; 22. a rubber seal ring; 23. a sealing groove; 24. positioning the bolt; 25. a screw; 26. a slide bar; 27. a chute; 28. a top groove; 29. a seal pin; 30. and (7) sealing the assembly.
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.
Example (b):
as shown in fig. 1-4, an embodiment of the present invention provides a combined christmas tree for an oil production well, including a body 17, a connecting body 4 flange-connected to the top middle portion of the body 17 through a connecting flange 18, a hollow inner middle portion of the body 17 both vertically and horizontally, a hollow inner middle portion of the connecting body 4 both vertically and horizontally, the body 17 and the connecting body 4 both vertically and horizontally, oil can pass through between the connecting body 4 and the body 17, a top sealing member 8 is fixedly connected to the top middle portion of the connecting body 4, the top sealing member 8 is arranged to install an upper paraffin cap 9, the top sealing member 8 is fixedly connected to the upper paraffin cap 9 through a fixing nut 20, and when the upper paraffin cap 9 is detached through a positioning bolt 24, the working personnel will not be damaged by the upper paraffin cap 9 due to the internal pressure of the connecting body 4, the fixing nuts 20 have six and are uniformly distributed in the upper paraffin cap 9, the lower extreme middle part of connector 4 is provided with main valve 13, and one side at body 17 lower extreme middle part is provided with seal assembly 30, and middle part opposite side lateral wall is provided with top groove 28 in the body 17 lower extreme, and top groove 28 set up in order to carry out the block with seal pin 29, realizes the disposable sealing to the production tree bottom, avoids the production tree because do not use or the sealing member too much leads to sealed not good.
The lower part of going up paraffin removal lid 9 extends to the upper portion in the connector 4, the middle part of going up paraffin removal lid 9 is provided with constant head tank 21, the lower extreme from the top down of going up paraffin removal lid 9 is provided with two the same seal grooves 23, all be provided with rubber seal 22 in the seal groove 23, rubber seal 22 all hugs closely the inner wall at connector 4, it also is sealed in order to realize connector 4 to go up paraffin removal lid 9 when the installation is used, the setting through rubber seal 22 has also strengthened the sealed effect of paraffin removal lid 9 simultaneously, the block through constant head tank 21 and positioning bolt 24 avoids paraffin removal lid 9 to be collapsed by pressure when dismantling.
One side at the middle part of the connector 4 is provided with a first sealing valve 5, flange connection has a first sealing seat 6 on one side of the connector 4, the one end middle part that the connector 4 was kept away from to the first sealing seat 6 is provided with manometer 7, the opposite side at the middle part of the connector 4 is provided with a second sealing valve 10, the opposite side flange connection of the connector 4 has a second connecting seat 12, the one end fixedly connected with second output tube 11 of the connector 4 is kept away from to the second connecting seat 12, when the connector 4 seals the production tree, through closing first sealing valve 5, the sealing of connector 4 just can be realized to second sealing valve 10 and main valve 13, realize detecting the pressure in the connector 4 through last manometer 7 simultaneously, also can avoid producing the danger of collapsing when opening the clear wax lid 9.
The middle part one side of body 17 is provided with first valve 1, one side flange joint of body 17 has first connecting seat 3, the first output tube 2 of one end fixedly connected with of body 17 is kept away from to first connecting seat 3, the middle part opposite side of body 17 is provided with second valve 16, the opposite side flange joint of body 17 has second seal receptacle 14, one side that body 17 was kept away from to second seal receptacle 14 is provided with down manometer 15, can carry crude oil through the setting of first output tube 2, can detect the pressure in the body 17 through the setting of manometer 15 down.
The lower end of the body 17 is flange-connected with an oil pipe 19 through a connecting flange 18, the lower end of the oil pipe 19 is arranged in an oil well, and oil extraction is carried out through the oil pipe 19.
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 (3)
1. A method of operating a combined christmas tree for a production well, the christmas tree comprising a body (17), characterized in that: the top end middle part of the body (17) is connected with a connecting body (4) through a connecting flange (18) in a flange manner, the vertical direction and the horizontal direction of the inner middle part of the body (17) are communicated and set to be hollow, the vertical direction and the horizontal direction of the inner middle part of the connecting body (4) are communicated and set to be hollow, the body (17) and the connecting body (4) are communicated, the top end middle part of the connecting body (4) is fixedly connected with a top sealing element (8), the top sealing element (8) is fixedly connected with an upper paraffin removal cover (9) through a fixing nut (20), the fixing nut (20) has six parts and is uniformly distributed in the upper paraffin removal cover (9), the lower end middle part of the connecting body (4) is provided with a main valve (13), one side of the middle part of the lower end of the body (17) is provided with a sealing assembly (30), the other side wall of the middle part in the lower end of the body (17) is provided with a top groove (28), a first valve (1) is arranged on one side of the middle of the body (17), a first connecting seat (3) is connected to one side of the body (17) in a flange mode, a first output pipe (2) is fixedly connected to one end, far away from the body (17), of the first connecting seat (3), a second valve (16) is arranged on the other side of the middle of the body (17), a second sealing seat (14) is connected to the other side of the body (17) in a flange mode, a lower pressure gauge (15) is arranged on one side, far away from the body (17), of the second sealing seat (14), the lower portion of the upper paraffin removal cover (9) extends to the upper portion of the connecting body (4), a positioning groove (21) is formed in the middle of the upper paraffin removal cover (9), two identical sealing grooves (23) are formed in the lower end of the upper paraffin removal cover (9) from top to bottom, and rubber sealing rings (22) are arranged in the sealing grooves (23), the rubber sealing ring (22) is tightly attached to the inner wall of the connecting body (4), the top sealing piece (8) is annular, six positioning bolts (24) are uniformly distributed in the middle of the inner portion of the top sealing piece (8), the close ends of the positioning bolts (24) are clamped in the positioning grooves (21), a first sealing valve (5) is arranged on one side of the middle portion of the connecting body (4), a first sealing seat (6) is connected to one side of the connecting body (4) in a flange mode, an upper pressure gauge (7) is arranged in the middle of one end, away from the connecting body (4), of the first sealing seat (6), a second sealing valve (10) is arranged on the other side of the middle portion of the connecting body (4), a second connecting seat (12) is connected to the other side of the connecting body (4) in a flange mode, and a second output pipe (11) is fixedly connected to one end, away from the connecting body (4), of the second connecting seat (12), through closing main valve (13), see the pressure value in the connector through last manometer (7) after main valve (13) are closed, through opening second sealing valve (10) make the pressure in the connector slowly descend in second output tube (11), go up after the pressure numerical value of manometer (7) approaches to atmospheric pressure, it is not hard up to lift down fixation nut (20) messenger wax removal lid (9), the gap discharge in wax removal lid (9) and the connector can be followed to unnecessary atmospheric pressure in the connector, simultaneously through the block of positioning bolt (24) and constant head tank (21), avoid wax removal lid (9) to be collapsed by gas and open and cause the incident.
2. The method of claim 1, wherein the method comprises: the interior middle part of seal assembly (30) is provided with spout (27), the inside intercommunication of spout (27) and body (17), sliding connection has seal pin (29) in spout (27), the one end of seal pin (29) is just to overhead tank (28), the other end middle part fixedly connected with slide bar (26) of seal pin (29), the one end rotation that seal pin (29) were kept away from in slide bar (26) is connected with screw rod (25), screw rod (25) run through the lateral wall of seal assembly (30) and extend.
3. The method of claim 1, wherein the method comprises: the lower end of the body (17) is connected with an oil pipe (19) through a connecting flange (18) in a flange mode, and the lower end of the oil pipe (19) is arranged in an oil well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226751.7A CN112096334B (en) | 2020-11-06 | 2020-11-06 | Combined production tree for production well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226751.7A CN112096334B (en) | 2020-11-06 | 2020-11-06 | Combined production tree for production well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112096334A CN112096334A (en) | 2020-12-18 |
| CN112096334B true CN112096334B (en) | 2022-02-08 |
Family
ID=73785393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011226751.7A Active CN112096334B (en) | 2020-11-06 | 2020-11-06 | Combined production tree for production well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112096334B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4202410A (en) * | 1979-02-28 | 1980-05-13 | W-K-M Wellhead Systems, Inc. | Seal testing arrangement for wellheads |
| CN2568805Y (en) * | 2002-08-28 | 2003-08-27 | 徐元信 | Whole blowout preventer for oil field |
| CN201209414Y (en) * | 2008-06-20 | 2009-03-18 | 南京伟业机械有限公司 | Multifunctional shaft mouth device |
| CN209163767U (en) * | 2018-11-06 | 2019-07-26 | 中国石油化工股份有限公司 | A kind of wellhead assembly |
| CN210068049U (en) * | 2019-06-02 | 2020-02-14 | 东营市金亿来石油机械有限公司 | Oil extraction well head with good sealing effect |
| CN211666677U (en) * | 2019-08-12 | 2020-10-13 | 中国石油天然气股份有限公司 | Injection-production type integrated wellhead |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701142A (en) * | 2017-10-21 | 2018-02-16 | 中国石油集团渤海钻探工程有限公司 | A kind of testing pressure of well head rotary sealing type casing blanking plug |
-
2020
- 2020-11-06 CN CN202011226751.7A patent/CN112096334B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4202410A (en) * | 1979-02-28 | 1980-05-13 | W-K-M Wellhead Systems, Inc. | Seal testing arrangement for wellheads |
| CN2568805Y (en) * | 2002-08-28 | 2003-08-27 | 徐元信 | Whole blowout preventer for oil field |
| CN201209414Y (en) * | 2008-06-20 | 2009-03-18 | 南京伟业机械有限公司 | Multifunctional shaft mouth device |
| CN209163767U (en) * | 2018-11-06 | 2019-07-26 | 中国石油化工股份有限公司 | A kind of wellhead assembly |
| CN210068049U (en) * | 2019-06-02 | 2020-02-14 | 东营市金亿来石油机械有限公司 | Oil extraction well head with good sealing effect |
| CN211666677U (en) * | 2019-08-12 | 2020-10-13 | 中国石油天然气股份有限公司 | Injection-production type integrated wellhead |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112096334A (en) | 2020-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112096334B (en) | Combined production tree for production well | |
| CN107701750A (en) | A kind of control water valve being conveniently replaceable | |
| CN211448599U (en) | Slip type hanger and continuous pipe completion pipe string mounting structure | |
| CN107126796B (en) | A kind of air water washing cleaning unit | |
| CN110043213B (en) | Sucker rod well head protector | |
| CN215169899U (en) | Oil jacket annular space priming device | |
| CN102251754B (en) | Blowout control tubing head with non-well-killing valve replacement | |
| CN211836789U (en) | Vertical oil-gas separator with high pressure oil gas convenient to clean and check | |
| CN107327704A (en) | A kind of coal gas drainer | |
| CN105952961B (en) | Collect defeated split type control valve | |
| CN219061575U (en) | Conveying structure with wellhead blowout prevention function | |
| CN103274137A (en) | Pneumatic double-storage-tank drainage controller | |
| CN102628348A (en) | Tubular tubing float valve | |
| CN206890097U (en) | A kind of coal gas drainer | |
| CN208667037U (en) | A kind of three-chip type grabs headkerchief | |
| CN217829224U (en) | Vertical filtration equipment of liquid | |
| CN210509098U (en) | Double-layer oil pipe gas injection oil extraction wellhead device | |
| CN220365552U (en) | Oil recovery well head flow device | |
| CN216077050U (en) | Blocking tool for on-site pressure test of blowout preventer | |
| CN217555825U (en) | Industrial silicon refining and purifying device | |
| CN214035625U (en) | Cable perforation well head blowout preventer | |
| CN213912568U (en) | Oil field water injection recoil type filtering dirt remover | |
| CN214749153U (en) | Lubricating oil collection and detection device | |
| CN216381488U (en) | Coal mine gas extraction adapter | |
| CN216321839U (en) | Triethyl phosphate production line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220117 Address after: 257000 Yantai Road 103 Industrial Park, Dongying District, Dongying City, Shandong Province Applicant after: SHENGLI FANLAND OIL EQUIPMENT CO.,LTD. Address before: No. 481, Huanghe Road, Dongying District, Dongying City, Shandong Province 257000 Applicant before: Dongying Haitian Automation Engineering Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |