CN104675357A - Simple wellhead device and application method thereof - Google Patents
Simple wellhead device and application method thereof Download PDFInfo
- Publication number
- CN104675357A CN104675357A CN201310632324.2A CN201310632324A CN104675357A CN 104675357 A CN104675357 A CN 104675357A CN 201310632324 A CN201310632324 A CN 201310632324A CN 104675357 A CN104675357 A CN 104675357A
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- Prior art keywords
- flange
- flap type
- well head
- mini
- links
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000630 rising effect Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 210000000664 rectum Anatomy 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 5
- 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
- 239000002131 composite material Substances 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
- 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, be specifically related to a kind of Simple wellhead appts and using method thereof, after oil gas well completion, meet the requirement that needs are temporarily closed to well head when temporarily not carrying out formation testing gas, say further, be mainly concerned with and long-time closed well head needs are in completion high-pressure gas well.
Background technology
In sea, the Continental Facies Stratigraphy in the Sichuan Basin, bury abundant oil-gas resource.Existing completion wellhead assembly is generally utilize christmas tree to carry out mining operations, and the gas well not carrying out exploiting is generally utilize cover plate flange closure well head, or utilizes open-and-shut wellhead assembly to close well head.
But to splash the characteristic of account because gas exists migration, slippage and rising in well, when gas rises to well head from shaft bottom, cause well head pressure very high, common wellhead assembly does not possess again the disposing capacity to well head high pressure.
Summary of the invention
The object of the invention is to solve the difficult problem existed in above-mentioned prior art, a kind of Simple wellhead appts and using method thereof are provided, realize 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 appts, comprises the cover plate flange 1, assistant flat-plate valve 2, main flap type 3, mini three links 4 and the instrument flange 5 that connect successively;
The upper port of described mini three links 4 is connected with instrument flange 5, and lower port is connected with the upper interface of main flap type 3, is provided with side flange in its side ports, and described side flange is the studding flange of band plug, it leaves thread flange, blocks under normal circumstances with plug.
Described instrument flange 5 is provided with two straight-through stop valves, each straight-through stop valve is all provided with a pressure meter.
Described straight-through stop valve is 70MP straight-through stop valve, and described two manometric pressure ranges are respectively 70MPa and 18MPa.
The upper port of described mini three links 4 is connected with instrument flange 5 by thread flange.
The lower port of described cover plate flange 1 is connected with completion casing head of well head, is provided with a set of metal steel ring and two and overlaps rubber, realize both sealings between cover plate flange 1 and completion casing head of well head.
The upper end of described assistant flat-plate valve 2 is connected with the lower end of main flap type 3, is provided with a set of metal steel ring between, realizes both sealings.
Described assistant flat-plate valve 2 and main flap type 3 all adopt rising stem (RS.) band foot piece flap type.
Described studding flange employing latus rectum is 78mm, pressure rank is the flange of 70Mpa.
The using method of described Simple wellhead appts comprises:
(1) described cover plate flange 1 is connected with well head completion casing head;
(2) judge whether assistant flat-plate valve 2 and the junction of main flap type 3, the junction of main flap type 3 and mini three links 4, the junction of mini three links 4 and instrument flange 5 and mini three links 4 occur seepage with the arbitrary junction in the junction of side flange, if there is a junction to occur seepage, then close assistant flat-plate valve 2, then step (5) is proceeded to, if there is no seepage, then proceed to step (3);
(3) well head pressure is detected by described pressure meter;
(4) judge whether well head is greater than 10Mpa, if so, then carry out weighted mud kill-job or circulating exhaust, pressure release by coiled tubing, then proceed to step (5), if not, then directly carry out open flow, then proceed to step (5);
(5) terminate.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the inventive method is utilized can to carry out Real-Time Monitoring to the pressure change of completion well head;
(2) when well head pressure is less than or equal to 10Mpa, directly open flow is carried out;
(3) when well head pressure is greater than 10Mpa and be less than 70Mpa, according to circumstances carry out circulating, weighted drilling fluid carries out kill job;
(4) in use procedure, if when seepage occurs the arbitrary place in the junction between flap type 2 and flap type 3, junction between flap type 3 and mini three links 4, the junction between mini three links 4 and side flange and the junction between mini three links 4 and instrument flange 5, replacing process is carried out to this device.
Accompanying drawing explanation
Fig. 1 is the step block diagram of the inventive method.
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.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, method of the present invention comprises:
(1) utilize the cover plate flange (be positioned at Fig. 2 bottom) identical with completion casing area of bed to connect well head, realize Simple wellhead appts and be connected with completion casing head;
(2) (the connection between flap type 2 and flap type 3 when seepage appears in follow-up flow process, connection between flap type 3 and mini three links 4, connection between mini three links 4 and side flange, during connection generation seepage between mini three links 4 and instrument flange 5, close Simple wellhead appts passage (namely closing flap type 2);
(3) follow-up flow process normal (namely in setting drawing between each parts connection leakproof phenomenon), detects well head pressure by pressure meter;
(4) when well head pressure is too high (when well head pressure gauge detected pressures is more than or equal to 10Mpa), take instrument flange 5 apart, carry out weighted mud kill-job or circulating exhaust, pressure release by coiled tubing;
(5) well head have pressure but not high time (when well head pressure gauge detected pressures is less than or equal to 10Mpa), directly carry out open flow, namely take the plug of side flange in mini three links 4 apart, the oil pipe of select tape silk, be connected to the pollution discharge pond open flow from well head safe or ignition.
(1) the present invention is in the gas well situation that serious analysis is current, takes into full account the characteristic of gas, by installing studding mini three links band side flange (being the composite member of standard)." " TBG (pin thread) shutoff that TBG (box), uses plug 2-7/8 under normal circumstances that side flange leaves thread flange 65-70 × 2-7/8.When gas slip a small amount of in well rises to well head, when pressure is not high, namely when well head pressure gauge detected pressures is less than or equal to 10Mpa, directly carry out open flow, specific as follows: PFF65-70 rising stem (RS.) band foot piece flap type 2 (i.e. assistant flat-plate valve 2) can be closed, take 2-7/8 apart " TBG (pin thread) plug, connects the oil pipe of corresponding size at this port, exit well outside the venue or circulating exhaust carry out corresponding disposal.
(2) mini three links (mini three links of GB) upper end and instrument Flange joint, when in well, gas flow is large, hypertonia, when well head pressure gauge detected pressures is more than or equal to 10Mpa, weighted mud kill-job or circulating exhaust is carried out by coiled tubing, pressure release, specific as follows: first can to close PFF65-70 (this is the model of this flap type) rising stem (RS.) band foot piece flap type 2 (i.e. assistant flat-plate valve 2), take apart and instrument Flange joint port, and the blowout prevention flange of coiled tubing is connected at this end, open PFF65-70 rising stem (RS.) band foot piece flap type 2 (i.e. assistant flat-plate valve 2) again, under enter 50.8mm-25.4mm coiled tubing carry out kill-job or circulating exhaust operation.
As shown in Figure 3, the connection following (for the different pressures situation of completed well, parts and the pressure rank of different model can be adopted, but the present invention being the most economical and the most practical) of Simple wellhead appts of the present invention and well head:
1, by well head cover plate flange 1:11, " × 105MPa BX1581 well head cover plate flange lower port is connected with completion casing head of well head (tubing head), well head cover plate flange base sealing neck adopts a set of metal steel ring (sealing namely between well head cover plate flange base and casing head (tubing head) is that steel ring seals), the sealing (well head cover plate flange base seals neck as shown in three thick black lines of level on Fig. 2 cover plate flange 1) of Simple wellhead appts and completion casing head of well head (tubing head) is realized with two cover rubber seal methods, be connected to upper port with PFF65-70 rising stem (RS.) band foot piece flap type 1, a set of metal steel ring is adopted to seal, to guarantee well head safe.
Well head cover plate flange 1 lower end adapter sleeve tube head 31, casing head 32, double male joint 33, annular cover plate 34, sleeve pipe 35 to 39 successively.
2, PFF65-70 are installed
Rising stem (RS.) band foot piece flap type 2 is assistant flat-plate valve, lower end and well head cover plate Flange joint, and upper end is connected with PFF65-70 rising stem (RS.) band foot piece flap type 2, is in normally open under normal circumstances.When a certain corollary apparatus of flap type more than 2 lost efficacy, closed this flap type 2, to change disabling device.
3, 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, lower end is connected with PFF65-70 rising stem (RS.) band foot piece flap type 2 that (flap type 2 and 3 two ends are all flanges, be 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 ranks of mini three links flange, all standardized structural element) connect, be in normally open.
4, " TBG (box), with plug 2-7/8 " flange of TBG (pin thread) shutoff side of installing studding mini three links and side ports flange (leaving thread flange) 65-70 × 2-7/8.This flange is chi size, pressure rank and selected coiled tubing size according to production string after completion and pressure rank and have selected that latus rectum is 78mm, pressure rank is the flange of 70Mpa.
(1) mini three links 4 lower end is connected with PFF65-70 rising stem (RS.) band foot piece flap type 2 by flange and bolt;
(2) mini three links upper end and instrument Flange joint, when in well, gas flow is large, pressure is high, when must carry out kill-job or circulating exhaust, first can close PFF65-70 rising stem (RS.) band foot piece flap type 2, take apart and instrument Flange joint port, and at the blowout prevention flange that this end connection coiled tubing carries, open rising stem (RS.) band foot piece flap type 2 again, under enter 50.8mm-25.4mm coiled tubing carry out kill-job or circulating exhaust operation;
(3) side ports flange leaves thread flange 65-70 × 2-7/8 " TBG (box), " TBG (pin thread) shutoff with plug 2-7/8.When gas slip a small amount of in well rises to well head, when pressure is not high, PFF65-70 rising stem (RS.) band foot piece flap type 2 can be closed, take 2-7/8 apart that " TBG (pin thread) plug, connect the oil pipe of corresponding size at this port, exit well carries out corresponding disposal outside the venue.
5, instrument flange 5
With 70MPa straight-through stop valve 2 on it, connect 2 pressure meters (each stop valve connecing a pressure meter) respectively, pressure gage measuring range is 70MPa, 18MPa, for detecting gas pressure in well.To process in well.Because when well head pressure is less than 10Mpa, the pressure meter of 70MPa often can not be supervised and whether be measured well head with pressure, and now select to go out well head pressure by accurate measurements during the pressure meter of 18Mpa, but when well head pressure is greater than 18Mpa, the pressure meter of 18Mpa cisco unity malfunction again.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and the method be not limited only to described by the above-mentioned detailed description of the invention of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (9)
1. a Simple wellhead appts, is characterized in that: described Simple wellhead appts comprises the cover plate flange (1), assistant flat-plate valve (2), main flap type (3), mini three links (4) and the instrument flange (5) that connect successively;
The upper port of described mini three links (4) is connected with instrument flange (5), and lower port is connected with the upper interface of main flap type (3), is provided with side flange in its side ports, and described side flange is the studding flange of band plug.
2. Simple wellhead appts according to claim 1, is characterized in that: described instrument flange (5) is provided with two straight-through stop valves, each straight-through stop valve is all provided with a pressure meter.
3. Simple wellhead appts according to claim 2, is characterized in that: described straight-through stop valve is 70MP straight-through stop valve, and described two manometric pressure ranges are respectively 70MPa and 18MPa.
4. Simple wellhead appts according to claim 3, is characterized in that: the upper port of described mini three links (4) is connected with instrument flange (5) by thread flange.
5. Simple wellhead appts according to claim 4, it is characterized in that: the lower port of described cover plate flange (1) is connected with completion casing head of well head, a set of metal steel ring and two is installed between cover plate flange (1) and completion casing head of well head and overlaps rubber.
6. Simple wellhead appts according to claim 5, is characterized in that: the upper end of described assistant flat-plate valve (2) is connected with the lower end of main flap type (3), is provided with a set of metal steel ring between.
7. Simple wellhead appts according to claim 6, is characterized in that: described assistant flat-plate valve (2) and main flap type (3) all adopt rising stem (RS.) band foot piece flap type.
8. according to the arbitrary described Simple wellhead appts of claim 1 to 7, it is characterized in that: described studding flange employing latus rectum is 78mm, pressure rank is the flange of 70Mpa.
9. a using method for Simple wellhead appts described in claim 8, is characterized in that: described method comprises:
(1) described cover plate flange (1) is connected with well head completion casing head;
(2) judge whether the arbitrary junction in 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), the junction of mini three links (4) and instrument flange (5) and junction between mini three links (4) and side flange occurs seepage, if there is a junction to occur seepage, then close assistant flat-plate valve (2), then step (5) is proceeded to, if there is no seepage, then proceed to step (3);
(3) well head pressure is detected by described pressure meter;
(4) judge whether well head is greater than 10Mpa, if so, then carry out weighted mud kill-job or circulating exhaust, pressure release by coiled tubing, then proceed to step (5), if not, then directly carry out open flow, then proceed to step (5);
(5) terminate.
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 true CN104675357A (en) | 2015-06-03 |
| CN104675357B CN104675357B (en) | 2017-05-24 |
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| 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368645A (en) * | 2016-10-19 | 2017-02-01 | 克拉玛依天兴泰石油科技有限公司 | Construction method for lifting up and placing down SAGD well temperature measurement cable under pressure |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368645A (en) * | 2016-10-19 | 2017-02-01 | 克拉玛依天兴泰石油科技有限公司 | Construction method for lifting up and placing down SAGD well temperature measurement cable under pressure |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104675357B (en) | 2017-05-24 |
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