CN104675357B - Simple wellhead device and application method thereof - Google Patents
Simple wellhead device and application method thereof Download PDFInfo
- Publication number
- CN104675357B CN104675357B CN201310632324.2A CN201310632324A CN104675357B CN 104675357 B CN104675357 B CN 104675357B CN 201310632324 A CN201310632324 A CN 201310632324A CN 104675357 B CN104675357 B CN 104675357B
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- application method
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000630 rising effect Effects 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 210000000664 rectum Anatomy 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a simple wellhead device and an application method thereof, and belongs to the field of petroleum exploration. The simple wellhead device comprises a cover plate flange (1), an assistant flat valve (2), a main flat valve (3), a small tee joint (4) and an instrument flange (5) which are sequentially connected; an upper end port of the small tee joint (4) is connected with the instrument flange (5), and while a lower end port of the small tee joint (4) is connected with an upper connector of the main flat valve (3); a side flange is mounted at the side end port of the small tee joint (4), wherein the side flange is a threading flange with a screwed plug, and a screwed flange is arranged on the side flange and can be blocked with a plug in general condition. With the adoption of the method, the change on pressure of a wellhead of a completed well can be monitored on real time.
Description
Technical field
The invention belongs to field of petroleum exploitation, and in particular to a kind of Simple wellhead apptss and its application method, Oil/gas Well are complete
After well, the interim requirement to well head closing of needs when temporarily formation testing gas is not carried out being met, further being said, it is right to be mainly concerned with
Completion high-pressure gas well is in closing well head for a long time to be needed.
Background technology
In sea, the Continental Facies Stratigraphy in the Sichuan Basin, abundant oil-gas resource is buried.Existing completion wellhead assembly one
As be to carry out mining operations using christmas tree, the gas well do not exploited is usually using cover plate flange closure well head, or to utilize
Open-and-shut wellhead assembly closes well head.
But, there is in well migration due to gas, slip and rise the characteristic of account of splashing, gas rises to well head from shaft bottom
When, cause well head pressure very high, common wellhead assembly does not possess the disposing capacity to well head high pressure again.
The content of the invention
It is an object of the invention to solve problem present in above-mentioned prior art, there is provided a kind of Simple wellhead apptss and its
Application method, realizes carrying out real-time monitoring to the pressure change of completion well head.
The present invention is achieved by the following technical solutions：
A kind of Simple wellhead apptss, including cover plate flange 1, assistant flat-plate valve 2, the main flap type 3, mini three links being sequentially connected
4 and instrument flange 5；
The upper port of the mini three links 4 is connected with instrument flange 5, and lower port is connected with the upper interface of main flap type 3, at it
Side ports are provided with side flange, and the side flange is the studding flange with plug, and thread flange is left thereon, is used under normal circumstances
Plug is blocked.
Two straight-through stop valves are installed on the instrument flange 5, one is mounted on each straight-through stop valve
Individual pressure gauge.
The straight-through stop valve is 70MP straight-through stop valves, and two manometric pressure ranges are respectively
70MPa and 18MPa.
The upper port of the mini three links 4 is connected by thread flange with instrument flange 5.
The lower port of the cover plate flange 1 is connected with completion casing head of well head, in cover plate flange 1 and completion wellhead casing pipe
A set of metal steel ring and two sets of rubber are installed between head to realize both sealings.
The upper end of the assistant flat-plate valve 2 is connected with the lower end of main flap type 3, and a set of metallic steel is provided with therebetween
Enclose to realize both sealings.
The assistant flat-plate valve 2 and main flap type 3 are using rising stem (RS.) band foot piece flap type.
It is the flange of 70Mpa for 78mm, pressure rank that the studding flange uses latus rectum.
The application method of the Simple wellhead apptss includes：
(1) the cover plate flange 1 is connected with well head completion casing head；
(2) junction of the assistant flat-plate valve 2 and main flap type 3, junction of main flap type 3 and mini three links 4, small by three is judged
Whether logical 4 there is seepage with any junction in the junction of junction and mini three links 4 with side flange of instrument flange 5,
If seepage occurs in a junction, then assistant flat-plate valve 2 is closed, step (5) is then transferred to, if without seepage, turned
Enter step (3)；
(3) well head pressure is detected by the pressure gauge；
(4) whether well head is judged more than 10Mpa, if it is, carrying out weighted mud kill-job or circulation row by coiled tubing
Gas, pressure release, are then transferred to step (5), if it is not, then directly carrying out open flow, are then transferred to step (5)；
(5) terminate.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) real-time monitoring can be carried out to the pressure change of completion well head using the inventive method；
(2) when well head pressure is less than or equal to 10Mpa, open flow is directly carried out；
(3) when well head pressure is more than 10Mpa and when being less than 70Mpa, according to circumstances it is circulated, weighted drilling fluid is pressed
Well operations；
(4) during use, if junction between flap type 2 and flap type 3, between flap type 3 and mini three links 4
Junction, the junction between the junction between mini three links 4 and side flange and mini three links 4 and instrument flange 5 in appoint
When there is seepage at one, replacing treatment is carried out to the device.
Brief description of the drawings
The step of Fig. 1 is the inventive method block diagram.
Fig. 2 is the structure chart of apparatus of the present invention.
Fig. 3 is the structural representation that apparatus of the present invention are connected with well head.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in figure 1, the method for the present invention includes：
(1) well head is connected using with completion casing area of bed identical cover plate flange (being located at the bottom of Fig. 2), realizes letter
Easy wellhead assembly is connected with completion casing head；
(2) when there is seepage in follow-up process (connection between flap type 2 and flap type 3, flap type 3 and mini three links 4 it
Between connection, the connection between mini three links 4 and side flange when connection between mini three links 4 and instrument flange 5 occurs seepage, closes
Close Simple wellhead apptss passage (closing flap type 2)；
(3) follow-up process is normal (ne-leakage phenomenon between each part connection i.e. in installation drawing), and well is detected by pressure gauge
Mouth pressure；
(4) when well head pressure is too high (when well head pressure gauge detection pressure is more than or equal to 10Mpa), instrument flange 5 is taken apart,
Weighted mud kill-job or circulating exhaust, pressure release are carried out by coiled tubing；
(5) well head have pressure but it is not high when (i.e. well head pressure gauge detection pressure be less than or equal to 10Mpa when), directly carry out
Open flow, that is, take the plug of side flange in mini three links 4 apart, selects the oil pipe with silk, is connected to the pollution discharge pond open flow from well head safe
Or ignition.
(1) present invention takes into full account the characteristic of gas in the case of the current gas well of serious analysis, small by installing studding
Three passband side flanges (being the sub-assembly of standard).Side flange leaves thread flange 65-70 × 2-7/8 " TBG (box), normally
In the case of use plug 2-7/8 " TBG (pin thread) block.When a small amount of gas slip rises to well head in well, when pressure is not high, that is, exist
When well head pressure gauge detection pressure is less than or equal to 10Mpa, open flow is directly carried out, it is specific as follows：PFF65-70 rising stem (RS.) band can be closed
Foot piece flap type 2 (i.e. assistant flat-plate valve 2), takes 2-7/8 apart, and " TBG (pin thread) plug connects the oil of corresponding size in this port
Pipe, exit well is outside the venue or circulating exhaust is accordingly disposed.
(2) mini three links (mini three links of GB) upper end is connected with instrument flange, when gas flow is big in well, hypertonia,
When well head pressure gauge detection pressure is more than or equal to 10Mpa, weighted mud kill-job or circulating exhaust, pressure release are carried out by coiled tubing,
It is specific as follows：(the i.e. assistant flat-plate valve of PFF65-70 (this is the model of the flap type) rising stem (RS.) band foot piece flap type 2 can first be closed
2), take apart with instrument flange connectivity port, and the coiled tubing of end connection herein blowout prevention flange, then open PFF65-70 rising stem (RS.)
Band foot piece flap type 2 (i.e. assistant flat-plate valve 2), under enter the coiled tubing of 50.8mm-25.4mm and carry out kill-job or circulating exhaust and make
Industry.
As shown in Figure 3, Simple wellhead apptss of the invention are following with the connection of well head (for the different pressures for completing well
Situation, can be using the part of different model and pressure rank, but the present invention is the most economical and the most practical)：
1st, by well head cover plate flange 1：11 " × 105MPa BX1581 well heads cover plate flange lower port and completion interval of well muzzle
Tube head (tubing head) is connected, and well head cover plate flange base sealing neck is using a set of metal steel ring (i.e. well head cover plate flange bottom
Sealing between portion and casing head (tubing head) is steel ring sealing), and two sets of rubber seal methods realize Simple wellhead apptss
With the sealing (on well head cover plate flange base sealing neck such as Fig. 2 cover plates flange 1 three of completion casing head of well head (tubing head)
Shown in the horizontal heavy black of bar), it is connected with PFF65-70 rising stem (RS.) band foot piece flap type 1 to upper port, it is close using a set of metal steel ring
Envelope, to ensure well head safe.
The lower end of well head cover plate flange 1 is sequentially connected casing head 31, casing head 32, double male joint 33, annular cover plate 34, sleeve pipe
35 to 39.
The 2nd, PFF65-70 are installed
Rising stem (RS.) band foot piece flap type 2 is auxiliary flap type, and lower end is connected with well head cover plate flange, upper end and PFF65-70
Rising stem (RS.) band foot piece flap type 2 is connected, under normal circumstances in normally open.When a certain corollary apparatus of flap type more than 2 fail,
This flap type 2 is closed, to change disabling device.
The 3rd, PFF65-70 rising stem (RS.) band foot piece flap type 2 is installed
Rising stem (RS.) band foot piece flap type 3 is main flap type, and lower end is connected (flat board with PFF65-70 rising stem (RS.) band foot piece flap type 2
The two ends of valve 2 and 3 are all flanges, are bolted between two flap types), upper end and studding mini three links body：65—70×
65-70 × 78-70 (flange pressure of flap type 3 and the pressure rank of mini three links flange, be all standard element) connections, are in
Normally open.
4th, " TBG (box) is used to install studding mini three links and side ports flange (leaving thread flange) 65-70 × 2-7/8
Plug 2-7/8 " TBG (pin thread) blocks the flange of side.The flange is chi size, the pressure stage according to production string after completion
Other and selected coiled tubing size and pressure rank and have selected latus rectum for 78mm, pressure rank are the flange of 70Mpa.
(1) lower end of mini three links 4 is connected by flange and bolt with PFF65-70 rising stem (RS.) band foot piece flap type 2；
(2) mini three links upper end is connected with instrument flange, and when gas flow is big in well, pressure is high, it is necessary to carry out kill-job or circulation
During exhaust, PFF65-70 rising stem (RS.) can be first closed with foot piece flap type 2, take apart and instrument flange connectivity port, and end connection herein
The blowout prevention flange that coiled tubing is carried, then open rising stem (RS.) band foot piece flap type 2, under enter the coiled tubing of 50.8mm-25.4mm and enter
Row kill-job or circulating exhaust operation；
(3) side ports flange leaves thread flange 65-70 × 2-7/8 " TBG (box), with plug 2-7/8 ", and TBG is (public
Button) closure.When a small amount of gas slip rises to well head in well, when pressure is not high, PFF65-70 rising stem (RS.) band foot piece flat board can be closed
Valve 2, takes 2-7/8 apart, and " TBG (pin thread) plug, the oil pipe of corresponding size is connected in this port, and exit well carries out corresponding position outside the venue
Put.
5th, instrument flange 5
70MPa straight-through stop valves 2 are carried thereon, 2 pressure gauges are connect respectively and (pressure is connect on each stop valve
Table), pressure gage measuring range is 70MPa, 18MPa, for detecting gas pressure in well.So as to being processed in well.Because working as well
When mouth pressure is less than 10Mpa, whether the pressure gauge of 70MPa tends not to supervision and measures well head with pressure, and now selects
Can go out well head pressure with accurate measurements during the pressure gauge of 18Mpa, but when well head pressure is more than 18Mpa, the pressure gauge of 18Mpa
And cisco unity malfunction.
Above-mentioned technical proposal is one embodiment of the present invention, for those skilled in the art, at this
On the basis of disclosure of the invention application process and principle, it is easy to make various types of improvement or deformation, this is not limited solely to
The method described by above-mentioned specific embodiment is invented, therefore previously described mode is preferred, and simultaneously without limitation
The meaning of property.
Claims (8)
1. a kind of application method of Simple wellhead apptss, it is cover plate flange (1) that the Simple wellhead apptss include being sequentially connected, auxiliary
Help flap type (2), main flap type (3), mini three links (4) and instrument flange (5)；The upper port and instrument method of the mini three links (4)
Blue (5) connection, lower port is connected with the upper interface of main flap type (3), and side flange is provided with its side ports, and the side flange is
Studding flange with plug；Two straight-through stop valves are installed on the instrument flange (5), on each straight-through stop valve
It is mounted on a pressure gauge；It is characterized in that：Methods described includes：
1. the cover plate flange (1) is connected with completion casing head of well head；
2. judge the junction of assistant flat-plate valve (2) and main flap type (3), the junction of main flap type (3) and mini three links (4),
Any junction in junction of the junction and mini three links (4) of mini three links (4) and instrument flange (5) and side flange between
Whether there is seepage, if seepage occurs in a junction, then close assistant flat-plate valve (2), be then transferred to step 5., if
There is no seepage, be then transferred to step 3.；
3. well head pressure is detected by the pressure gauge；
4. whether well head pressure is judged more than 10Mpa, if it is, weighted mud kill-job or pressure release are carried out by coiled tubing, so
After be transferred to step 5., if it is not, then directly carrying out open flow, be then transferred to step 5.；
5. terminate.
2. the application method of Simple wellhead apptss according to claim 1, it is characterised in that：The pressure release includes that circulation is arranged
Gas.
3. the application method of Simple wellhead apptss according to claim 1, it is characterised in that：The straight-through stop valve is
70MPa straight-through stop valves, two manometric pressure ranges are respectively 70MPa and 18MPa.
4. the application method of Simple wellhead apptss according to claim 3, it is characterised in that：The mini three links (4) it is upper
Port is connected by thread flange with instrument flange (5).
5. the application method of Simple wellhead apptss according to claim 4, it is characterised in that：The cover plate flange (1)
Lower port is connected with completion casing head of well head, and a set of metal is provided between cover plate flange (1) and completion casing head of well head
Steel ring and two sets of rubber.
6. the application method of Simple wellhead apptss according to claim 5, it is characterised in that：The assistant flat-plate valve (2)
Upper end be connected with the lower end of main flap type (3), a set of metal steel ring is installed therebetween.
7. the application method of Simple wellhead apptss according to claim 6, it is characterised in that：The assistant flat-plate valve (2)
With main flap type (3) using rising stem (RS.) band foot piece flap type.
8. the application method of Simple wellhead apptss according to any one of claim 1 to 7, it is characterised in that：The cultivation
It is the flange of 70Mpa for 78mm, pressure rank that silk flange uses latus rectum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632324.2A CN104675357B (en) | 2013-12-02 | 2013-12-02 | Simple wellhead device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632324.2A CN104675357B (en) | 2013-12-02 | 2013-12-02 | Simple wellhead device and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104675357A CN104675357A (en) | 2015-06-03 |
| CN104675357B true CN104675357B (en) | 2017-05-24 |
Family
ID=53310885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310632324.2A Active CN104675357B (en) | 2013-12-02 | 2013-12-02 | Simple wellhead device and application method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN104675357B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368645B (en) * | 2016-10-19 | 2019-09-03 | 克拉玛依天兴泰石油科技有限公司 | SAGD well temperature measuring cable is with pressure to be mentioned, under construction method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3160427A (en) * | 1961-12-04 | 1964-12-08 | Acf Ind Inc | Gage-plug connection for wellhead assembly |
| US4232736A (en) * | 1978-10-23 | 1980-11-11 | Pillette Kibbie P | Leak detection system and control using non-rigid bladder |
| CN2256031Y (en) * | 1996-06-21 | 1997-06-11 | 川西南矿区恒达机械厂 | Low pressure lightweight top apparatus of gas well |
| CN2479195Y (en) * | 2001-05-17 | 2002-02-27 | 新疆石油管理局采油工艺研究院 | Pumping wellhead device |
| CN200958389Y (en) * | 2006-10-18 | 2007-10-10 | 四川内江宏生石油机械有限公司 | Manograph of throttle pipe |
| CN102678079A (en) * | 2011-03-07 | 2012-09-19 | 韦波 | Natural gas double-wellhead device |
| CN202520265U (en) * | 2011-12-20 | 2012-11-07 | 江苏宏泰石化机械有限公司 | Gas production well head device with metallic seals |
| CN202990990U (en) * | 2012-12-21 | 2013-06-12 | 江苏金石富源机械有限公司 | Integral combined valve type dual-pipe oil and gas recovery wellhead device |
| CN203213990U (en) * | 2013-02-22 | 2013-09-25 | 江苏天泰电站阀门有限公司 | Oil extraction well mouth device with leakage valve capable of being replaced safely |
| CN203257363U (en) * | 2013-04-11 | 2013-10-30 | 江苏爱科斯伦油田设备制造有限公司 | Novel coal bed gas wellhead structure |
-
2013
- 2013-12-02 CN CN201310632324.2A patent/CN104675357B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3160427A (en) * | 1961-12-04 | 1964-12-08 | Acf Ind Inc | Gage-plug connection for wellhead assembly |
| US4232736A (en) * | 1978-10-23 | 1980-11-11 | Pillette Kibbie P | Leak detection system and control using non-rigid bladder |
| CN2256031Y (en) * | 1996-06-21 | 1997-06-11 | 川西南矿区恒达机械厂 | Low pressure lightweight top apparatus of gas well |
| CN2479195Y (en) * | 2001-05-17 | 2002-02-27 | 新疆石油管理局采油工艺研究院 | Pumping wellhead device |
| CN200958389Y (en) * | 2006-10-18 | 2007-10-10 | 四川内江宏生石油机械有限公司 | Manograph of throttle pipe |
| CN102678079A (en) * | 2011-03-07 | 2012-09-19 | 韦波 | Natural gas double-wellhead device |
| CN202520265U (en) * | 2011-12-20 | 2012-11-07 | 江苏宏泰石化机械有限公司 | Gas production well head device with metallic seals |
| CN202990990U (en) * | 2012-12-21 | 2013-06-12 | 江苏金石富源机械有限公司 | Integral combined valve type dual-pipe oil and gas recovery wellhead device |
| CN203213990U (en) * | 2013-02-22 | 2013-09-25 | 江苏天泰电站阀门有限公司 | Oil extraction well mouth device with leakage valve capable of being replaced safely |
| CN203257363U (en) * | 2013-04-11 | 2013-10-30 | 江苏爱科斯伦油田设备制造有限公司 | Novel coal bed gas wellhead structure |
Non-Patent Citations (2)
| Title |
|---|
| 《国外高压采油采气井口装置简述》;闵布泽;《石油钻采机械通讯》;19780331;第17-26页 * |
| 《我国井口装置的现状及可靠性研究的必要》;陈浩 等;《西南石油学院学报》;19911130;第13卷(第4期);第119-123页 * |
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| CN104675357A (en) | 2015-06-03 |
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