CN203626682U - SAGD (steam assisted gravity drainage) steam injection well head device - Google Patents
SAGD (steam assisted gravity drainage) steam injection well head device Download PDFInfo
- Publication number
- CN203626682U CN203626682U CN201320695618.5U CN201320695618U CN203626682U CN 203626682 U CN203626682 U CN 203626682U CN 201320695618 U CN201320695618 U CN 201320695618U CN 203626682 U CN203626682 U CN 203626682U
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- protective cover
- gate valve
- jackscrew
- steam injection
- outside
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- Expired - Lifetime
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 58
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 55
- 230000001681 protective effect Effects 0.000 claims description 44
- 241000254175 Anthonomus grandis Species 0.000 claims description 36
- 230000001012 protector Effects 0.000 claims description 14
- 239000004519 grease Substances 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000001050 lubricating effect Effects 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of steam injection well head devices, and provides an SAGD (steam assisted gravity drainage) steam injection well head device. The SAGD steam injection well head device comprises a straight cross, a first gate valve, a crossover flange, a tubing head bottom bracket, a casing flange and an oil tube hanger, wherein the straight cross, the first gate valve, the crossover flange, the tubing head bottom bracket and the casing flange are fixedly mounted together in sequence from top to bottom; a vertically through main through hole is formed in the tubing head bottom bracket; a setting frustum is arranged on the inner wall of the main through hole; a metal baffle ring is located on the setting frustum; and the outside of the lower part of the oil tube hanger is located on the metal baffle ring. The SAGD steam injection well head device is reasonable and compact in structure and convenient to use, a steam injection oil tube can be suspended by the oil tube hanger, the oil tube hanger is directly lifted out when the steam injection oil tube is subjected to post-maintenance, and the oil tube hanger is lifted to the well head along with the steam injection oil tube for maintenance, so that the maintenance operation of the steam injection oil tube is easy to perform, and well control reliability and stability of the SAGD steam injection well head device are improved.
Description
Technical field
the utility model relates to steam injection wellhead assembly technical field, is a kind of SAGD steam injection wellhead assembly.
Background technology
along with SAGD production technology is in the large-scale promotion application in the super heavy oil development of Xinjiang Oilfield field, steam injection wellhead assembly is as the main well control equipment of controlling steam injection process, and its reliability and stability have directly determined SAGD steam injection and oil recovery efficiency.In actual steam injection operation process, steam injection wellhead assembly must meet following requirement: one side can adapt to the working condition requirement of being on active service continuously chronically at high-temperature high-pressure state, and its structure can meet the requirement of Operating Pressure on the other hand.Existing steam injection wellhead assembly in use, steam injection oil pipe is directly suspended on lower-left port and the bottom right port of bottom in tubing head five-way, in the time being suspended on steam injection oil pipe in lower-left port and bottom right port and need to safeguarding, must be by tubing head five-way after casing flange disassembles, steam injection oil pipe could be proposed in well, increase thus the difficulty of steam injection oil pipe later maintenance, thereby reduced the reliability and stability of steam injection wellhead assembly.
Summary of the invention
the utility model provides a kind of SAGD steam injection wellhead assembly, has overcome the deficiency of above-mentioned prior art, and it can effectively solve the problem that is difficult for carrying out the later maintenance of steam injection oil pipe that existing steam injection wellhead assembly exists in actual use.
the technical solution of the utility model realizes by following measures: a kind of SAGD steam injection wellhead assembly, comprise straight cross, the first gate valve, crossover flange, tubing head five-way, casing flange and boll-weevil hanger, straight cross, the first gate valve, crossover flange, tubing head five-way and casing flange are sequentially fixedly installed togather from top to bottom, on tubing head five-way, there is the main through hole of up/down perforation, on the inwall of main through hole, set frustum, there is metal baffle ring setting the frustum seat of honour, the lower outside seat of boll-weevil hanger is on metal baffle ring, be installed with jackscrew lock sealing device on the top of tubing head five-way, the inner of jackscrew lock sealing device and the outside of boll-weevil hanger are fitted together, on the tubing head five-way that is positioned at main through hole both sides, there are left port and right port, the lower-left port communicating with left port is arranged at the bottom at the tubing head five-way that is positioned at main through hole left side, the bottom right port communicating with right port is arranged at the bottom at the tubing head five-way that is positioned at main through hole right side.
the further optimization and/or improvements to above-mentioned utility model technical scheme below:
on above-mentioned straight cross, can be installed with the second gate valve, the 3rd gate valve and the 4th gate valve, the left end of tubing head five-way and right-hand member are sequentially installed with the 5th gate valve and the 6th gate valve, on the second gate valve, the 3rd gate valve, the 4th gate valve, the 5th gate valve and the 6th gate valve, are all installed with valve gap.
between above-mentioned crossover flange and boll-weevil hanger, can be installed with interior ring gasket, between crossover flange and tubing head five-way, be installed with external seal steel ring, at the first gate valve, the second gate valve, between the 3rd gate valve and the 4th gate valve and straight cross, be all installed with the sealing ring together with being no less than, between the 5th gate valve and the left end of tubing head five-way, be installed with the sealing ring together with being no less than, between the 6th gate valve and the right-hand member of tubing head five-way, be installed with the sealing ring together with being no less than, between the lower end of tubing head five-way and casing flange, there is the sealing ring together with being no less than.
on above-mentioned crossover flange, can have and be no less than interior narrow outer wide radially greasing groove of one be, being radially installed with greasing plug in greasing groove, on the crossover flange between interior ring gasket and external seal steel ring, have and longitudinal greasing groove that radially greasing groove communicates.
the outside of above-mentioned boll-weevil hanger can have and is opening V-type groove outwardly, the inner of jackscrew lock sealing device is positioned at V-type groove, outside, middle part at boll-weevil hanger is fixed with locking nut, the lower end of the upper end of locking nut and metal baffle ring is fitted together, on the crossover flange in outside, jackscrew lock sealing device middle part, be installed with jackscrew protector, jackscrew protector comprises protective cover, on the crossover flange in outside, jackscrew lock sealing device middle part, there is erection loop platform, in erection loop platform, be fixed with opening protective cover inwardly, the outer end of jackscrew lock sealing device is positioned at the inside of protective cover, there is the grease injection hole communicating with protective cover inside in the upper outside of protective cover, in grease injection hole, be installed with lubricating cup by screw thread, there is the air equalizer opening communicating with protective cover inside at middle part, outer end at protective cover, in air equalizer opening, be installed with screw.
all there is interior connecting thread the inner side, outer end of above-mentioned left port and right port, all has screw thread in the lower inside of lower-left port and bottom right port.
the utility model reasonable and compact in structure, easy to use, the setting of boll-weevil hanger can be hung steam injection oil pipe, in the time that steam injection oil pipe is carried out to later maintenance, directly boll-weevil hanger is proposed, steam injection oil pipe is carried together to well head and being safeguarded along with boll-weevil hanger, makes the upkeep operation of steam injection oil pipe be easy to carry out, thereby has improved well control reliability and stability of the present utility model.
Accompanying drawing explanation
the master that accompanying drawing 1 is the utility model most preferred embodiment looks broken section structural representation.
accompanying drawing 2 is the local structure for amplifying schematic diagram at A place in accompanying drawing 1.
coding in accompanying drawing is respectively: 1 is straight cross, 2 is the first gate valve, 3 is crossover flange, 4 is tubing head five-way, 5 is casing flange, 6 is boll-weevil hanger, 7 is metal baffle ring, 8 is jackscrew lock sealing device, 9 is left port, 10 is right port, 11 is sealing ring, 12 is bottom right port, 13 is the second gate valve, 14 is the 3rd gate valve, 15 is the 4th gate valve, 16 is the 5th gate valve, 17 is the 6th gate valve, 18 is valve gap, 19 is interior ring gasket, 20 is external seal steel ring, 21 is greasing plug, 22 is longitudinal greasing groove, 23 is locking nut, 24 is protective cover, 25 is lubricating cup, 26 is screw, 27 is interior connecting thread, 28 is screw thread, 29 is main through hole.
The specific embodiment
the utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as accompanying drawing 1, shown in 2, this SAGD steam injection wellhead assembly comprises straight cross 1, the first gate valve 2, crossover flange 3, tubing head five-way 4, casing flange 5 and boll-weevil hanger 6, straight cross 1, the first gate valve 2, crossover flange 3, tubing head five-way 4 and casing flange 5 are sequentially fixedly installed togather from top to bottom, on tubing head five-way 4, there is the main through hole 29 of up/down perforation, on the inwall of main through hole 29, set frustum, there is metal baffle ring 7 setting the frustum seat of honour, the lower outside seat of boll-weevil hanger 6 is on metal baffle ring 7, be installed with jackscrew lock sealing device 8 on the top of tubing head five-way 4, the inner of jackscrew lock sealing device 8 and the outside of boll-weevil hanger 6 are fitted together, on the tubing head five-way 4 that is positioned at main through hole 29 both sides, there are left port 9 and right port 10, the lower-left port communicating with left port 9 is arranged at the bottom at the tubing head five-way that is positioned at main through hole 29 left sides, the bottom right port 12 communicating with right port 10 is arranged at the bottom at the tubing head five-way that is positioned at main through hole 29 right sides.The setting of boll-weevil hanger 6 can be hung steam injection oil pipe, in the time that steam injection oil pipe is carried out to later maintenance, directly boll-weevil hanger 6 is proposed, steam injection oil pipe is along with boll-weevil hanger 6 is carried together to well head and being safeguarded, make the upkeep operation of steam injection oil pipe be easy to carry out, thereby improved well control reliability and stability of the present utility model; Jackscrew lock sealing device 8 is existing known technology; Jackscrew lock sealing device 8 can be locked at boll-weevil hanger 6 in tubing head five-way 4 securely; The setting of left port 9 can detect the steam injection pressure in steam injection process.
can according to actual needs, above-mentioned SAGD steam injection wellhead assembly be made further optimization and/or improvements:
as shown in accompanying drawing 1,2, on straight cross 1, be installed with the second gate valve 13, the 3rd gate valve 14 and the 4th gate valve 15, the left end of tubing head five-way 4 and right-hand member are sequentially installed with the 5th gate valve 16 and the 6th gate valve 17, on the second gate valve 13, the 3rd gate valve 14, the 4th gate valve 15, the 5th gate valve 16 and the 6th gate valve 17, are all installed with valve gap 18.
as accompanying drawing 1, shown in 2, between crossover flange 3 and boll-weevil hanger 6, be installed with interior ring gasket 19, between crossover flange 3 and tubing head five-way 4, be installed with external seal steel ring 20, at the first gate valve 2, the second gate valve 13, between the 3rd gate valve 14 and the 4th gate valve 15 and straight cross 1, be all installed with the sealing ring 11 together with being no less than, between the 5th gate valve 16 and the left end of tubing head five-way 4, be installed with the sealing ring 11 together with being no less than, between the 6th gate valve 17 and the right-hand member of tubing head five-way 4, be installed with the sealing ring 11 together with being no less than, between the lower end of tubing head five-way 4 and casing flange 5, there is the sealing ring 11 together with being no less than.Interior ring gasket 19 and external seal steel ring 20 arrange the sealing guaranteeing between crossover flange 3 and tubing head five-way 4, and the setting of sealing ring 11 can further improve the reliability and stability of sealing.
as shown in accompanying drawing 1,2, on crossover flange 3, have and be no less than interior narrow outer wide radially greasing groove of one be, being radially installed with greasing plug 21 in greasing groove, on the crossover flange 3 between interior ring gasket 19 and external seal steel ring 20, have and longitudinal greasing groove 22 that radially greasing groove communicates.By to greasing groove radially with longitudinally after the interior injection seal grease of greasing groove 22, then greasing plug 21 is fixedly mounted on radially in greasing groove, can further improve the sealing between crossover flange 3 and tubing head five-way 4.
as accompanying drawing 1, shown in 2, have in the outside of boll-weevil hanger 6 and be opening V-type groove outwardly, the inner of jackscrew lock sealing device 8 is positioned at V-type groove, outside, middle part at boll-weevil hanger 6 is fixed with locking nut 23, the lower end of the upper end of locking nut 23 and metal baffle ring 7 is fitted together, on the crossover flange 3 in jackscrew lock sealing device 8 outsides, middle part, be installed with jackscrew protector, jackscrew protector comprises protective cover 24, on the crossover flange 3 in jackscrew lock sealing device 8 outsides, middle part, there is erection loop platform, in erection loop platform, be fixed with opening protective cover 24 inwardly, the outer end of jackscrew lock sealing device 8 is positioned at the inside of protective cover 24, there is the grease injection hole communicating with protective cover 24 inside in the upper outside of protective cover 24, in grease injection hole, be installed with lubricating cup 25 by screw thread 28, there is the air equalizer opening communicating with protective cover 24 inside at middle part, outer end at protective cover 24, in air equalizer opening, be installed with screw 26.The setting of protective cover 24 and lubricating cup 25 can be played to jackscrew lock sealing device 8 effect of protection, guarantees the locking effect of jackscrew lock sealing device 8 to boll-weevil hanger 6, can avoid jackscrew lock sealing device 8 that corrosion occurs simultaneously.
as shown in accompanying drawing 1,2, all there is interior connecting thread 27 in the inner side, outer end of left port 9 and right port 10, all there is screw thread 28 in the lower inside of lower-left port and bottom right port 12.The setting of interior connecting thread 27 can occur leaking in the situation that out of control at the 5th gate valve 16 and the 6th gate valve 17, can change gate valve; The setting of the lower inside screw thread 28 of lower-left port and bottom right port 12 is convenient to hang steam injection oil pipe.
above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
the use procedure of the utility model most preferred embodiment: first, casing flange 5 is fixedly installed in well, be lowered to two steam injection oil pipes and be fixedly installed togather with lower-left port and bottom right port 12 respectively, unload jackscrew protector and screw out jackscrew lock sealing device 8, then take out boll-weevil hanger 6, by steam injection oil pipe G.I.H, in the time that last root steam injection oil pipe approaches tubing head five-way 4, the upper end of steam injection oil pipe is suspended on boll-weevil hanger 6, tighten jackscrew lock sealing device 8 and jackscrew protector, complete that oil pipe is transferred and hanger is setting, sequentially by crossover flange 3, the first gate valve 2 and straight cross 1 are fixedly installed togather, then, inject high-temperature steam by straight cross 1 to horizontal segment in well downhole crude is carried out to cyclic preheat, simultaneously, the crude oil of down-hole viscosity reduction returns out by the right-hand member of tubing head five-way 4, finally, enter after the SAGD production phase, respectively the diverse location of horizontal segment in well is carried out to steam injection by being suspended on steam injection oil pipe on boll-weevil hanger 6 and the steam injection oil pipe of bottom right port 12.
Claims (10)
1. a SAGD steam injection wellhead assembly, it is characterized in that comprising straight cross, the first gate valve, crossover flange, tubing head five-way, casing flange and boll-weevil hanger, straight cross, the first gate valve, crossover flange, tubing head five-way and casing flange are sequentially fixedly installed togather from top to bottom, on tubing head five-way, there is the main through hole of up/down perforation, on the inwall of main through hole, set frustum, there is metal baffle ring setting the frustum seat of honour, the lower outside seat of boll-weevil hanger is on metal baffle ring, be installed with jackscrew lock sealing device on the top of tubing head five-way, the inner of jackscrew lock sealing device and the outside of boll-weevil hanger are fitted together, on the tubing head five-way that is positioned at main through hole both sides, there are left port and right port, the lower-left port communicating with left port is arranged at the bottom at the tubing head five-way that is positioned at main through hole left side, the bottom right port communicating with right port is arranged at the bottom at the tubing head five-way that is positioned at main through hole right side.
2. SAGD steam injection wellhead assembly according to claim 1, it is characterized in that being installed with on straight cross the second gate valve, the 3rd gate valve and the 4th gate valve, the left end of tubing head five-way and right-hand member are sequentially installed with the 5th gate valve and the 6th gate valve, on the second gate valve, the 3rd gate valve, the 4th gate valve, the 5th gate valve and the 6th gate valve, are all installed with valve gap.
3. SAGD steam injection wellhead assembly according to claim 1 and 2, it is characterized in that being installed with between crossover flange and boll-weevil hanger interior ring gasket, between crossover flange and tubing head five-way, be installed with external seal steel ring, at the first gate valve, the second gate valve, between the 3rd gate valve and the 4th gate valve and straight cross, be all installed with the sealing ring together with being no less than, between the 5th gate valve and the left end of tubing head five-way, be installed with the sealing ring together with being no less than, between the 6th gate valve and the right-hand member of tubing head five-way, be installed with the sealing ring together with being no less than, between the lower end of tubing head five-way and casing flange, there is the sealing ring together with being no less than.
4. SAGD steam injection wellhead assembly according to claim 1 and 2, it is characterized in that having and being no less than interior narrow outer wide radially greasing groove of one be on crossover flange, being radially installed with greasing plug in greasing groove, on the crossover flange between interior ring gasket and external seal steel ring, have and longitudinal greasing groove that radially greasing groove communicates.
5. SAGD steam injection wellhead assembly according to claim 3, it is characterized in that having and being no less than interior narrow outer wide radially greasing groove of one be on crossover flange, being radially installed with greasing plug in greasing groove, on the crossover flange between interior ring gasket and external seal steel ring, have and longitudinal greasing groove that radially greasing groove communicates.
6. SAGD steam injection wellhead assembly according to claim 1 and 2, the outside that it is characterized in that boll-weevil hanger has and is opening V-type groove outwardly, the inner of jackscrew lock sealing device is positioned at V-type groove, outside, middle part at boll-weevil hanger is fixed with locking nut, the lower end of the upper end of locking nut and metal baffle ring is fitted together, on the crossover flange in outside, jackscrew lock sealing device middle part, be installed with jackscrew protector, jackscrew protector comprises protective cover, on the crossover flange in outside, jackscrew lock sealing device middle part, there is erection loop platform, in erection loop platform, be fixed with opening protective cover inwardly, the outer end of jackscrew lock sealing device is positioned at the inside of protective cover, there is the grease injection hole communicating with protective cover inside in the upper outside of protective cover, in grease injection hole, be installed with lubricating cup by screw thread, there is the air equalizer opening communicating with protective cover inside at middle part, outer end at protective cover, in air equalizer opening, be installed with screw.
7. SAGD steam injection wellhead assembly according to claim 3, the outside that it is characterized in that boll-weevil hanger has and is opening V-type groove outwardly, the inner of jackscrew lock sealing device is positioned at V-type groove, outside, middle part at boll-weevil hanger is fixed with locking nut, the lower end of the upper end of locking nut and metal baffle ring is fitted together, on the crossover flange in outside, jackscrew lock sealing device middle part, be installed with jackscrew protector, jackscrew protector comprises protective cover, on the crossover flange in outside, jackscrew lock sealing device middle part, there is erection loop platform, in erection loop platform, be fixed with opening protective cover inwardly, the outer end of jackscrew lock sealing device is positioned at the inside of protective cover, there is the grease injection hole communicating with protective cover inside in the upper outside of protective cover, in grease injection hole, be installed with lubricating cup by screw thread, there is the air equalizer opening communicating with protective cover inside at middle part, outer end at protective cover, in air equalizer opening, be installed with screw.
8. SAGD steam injection wellhead assembly according to claim 4, the outside that it is characterized in that boll-weevil hanger has and is opening V-type groove outwardly, the inner of jackscrew lock sealing device is positioned at V-type groove, outside, middle part at boll-weevil hanger is fixed with locking nut, the lower end of the upper end of locking nut and metal baffle ring is fitted together, on the crossover flange in outside, jackscrew lock sealing device middle part, be installed with jackscrew protector, jackscrew protector comprises protective cover, on the crossover flange in outside, jackscrew lock sealing device middle part, there is erection loop platform, in erection loop platform, be fixed with opening protective cover inwardly, the outer end of jackscrew lock sealing device is positioned at the inside of protective cover, there is the grease injection hole communicating with protective cover inside in the upper outside of protective cover, in grease injection hole, be installed with lubricating cup by screw thread, there is the air equalizer opening communicating with protective cover inside at middle part, outer end at protective cover, in air equalizer opening, be installed with screw.
9. SAGD steam injection wellhead assembly according to claim 5, the outside that it is characterized in that boll-weevil hanger has and is opening V-type groove outwardly, the inner of jackscrew lock sealing device is positioned at V-type groove, outside, middle part at boll-weevil hanger is fixed with locking nut, the lower end of the upper end of locking nut and metal baffle ring is fitted together, on the crossover flange in outside, jackscrew lock sealing device middle part, be installed with jackscrew protector, jackscrew protector comprises protective cover, on the crossover flange in outside, jackscrew lock sealing device middle part, there is erection loop platform, in erection loop platform, be fixed with opening protective cover inwardly, the outer end of jackscrew lock sealing device is positioned at the inside of protective cover, there is the grease injection hole communicating with protective cover inside in the upper outside of protective cover, in grease injection hole, be installed with lubricating cup by screw thread, there is the air equalizer opening communicating with protective cover inside at middle part, outer end at protective cover, in air equalizer opening, be installed with screw.
10. SAGD steam injection wellhead assembly according to claim 9, is characterized in that all there is interior connecting thread the inner side, outer end of left port and right port, all has screw thread in the lower inside of lower-left port and bottom right port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320695618.5U CN203626682U (en) | 2013-11-06 | 2013-11-06 | SAGD (steam assisted gravity drainage) steam injection well head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320695618.5U CN203626682U (en) | 2013-11-06 | 2013-11-06 | SAGD (steam assisted gravity drainage) steam injection well head device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626682U true CN203626682U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320695618.5U Expired - Lifetime CN203626682U (en) | 2013-11-06 | 2013-11-06 | SAGD (steam assisted gravity drainage) steam injection well head device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203626682U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975818A (en) * | 2015-06-30 | 2015-10-14 | 中国石油天然气股份有限公司 | Equipment and process method for pulling and dropping oil pipe |
| CN108104767A (en) * | 2017-12-28 | 2018-06-01 | 中国石油天然气集团公司 | SAGD oil recovery production wellhead devices |
| CN108119096A (en) * | 2017-12-28 | 2018-06-05 | 中国石油天然气集团公司 | SAGD steam injection wellhead assemblies |
| CN113513284A (en) * | 2021-08-27 | 2021-10-19 | 江苏宏泰石化机械有限公司 | Compact shale gas production wellhead assembly |
-
2013
- 2013-11-06 CN CN201320695618.5U patent/CN203626682U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975818A (en) * | 2015-06-30 | 2015-10-14 | 中国石油天然气股份有限公司 | Equipment and process method for pulling and dropping oil pipe |
| CN104975818B (en) * | 2015-06-30 | 2017-05-10 | 中国石油天然气股份有限公司 | Equipment and process method for pulling and dropping oil pipe |
| CN108104767A (en) * | 2017-12-28 | 2018-06-01 | 中国石油天然气集团公司 | SAGD oil recovery production wellhead devices |
| CN108119096A (en) * | 2017-12-28 | 2018-06-05 | 中国石油天然气集团公司 | SAGD steam injection wellhead assemblies |
| CN113513284A (en) * | 2021-08-27 | 2021-10-19 | 江苏宏泰石化机械有限公司 | Compact shale gas production wellhead assembly |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |