CN108457642A - A kind of more gradient pressure test devices of pit shaft - Google Patents
A kind of more gradient pressure test devices of pit shaft Download PDFInfo
- Publication number
- CN108457642A CN108457642A CN201810071616.6A CN201810071616A CN108457642A CN 108457642 A CN108457642 A CN 108457642A CN 201810071616 A CN201810071616 A CN 201810071616A CN 108457642 A CN108457642 A CN 108457642A
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- CN
- China
- Prior art keywords
- sleeve pipe
- drill string
- feed liquor
- separator
- pit shaft
- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The present invention provides a kind of more gradient pressure test devices of pit shaft, including：Casing string is provided with multiple pressure sensors, multiple axially spaced arrangements of pressure sensor on described sleeve pipe column；Drill string in described sleeve pipe column is set, and the lower ending opening of the drill string is so that the drill string is connected with described sleeve pipe column；Be connected separator with the drill string, and the separator is located in described sleeve pipe column；One end of feed liquor pipeline, the feed liquor pipeline is connected with the first storage tank, and the other end is connected with the upper end of the drill string, and kinetic pump is provided on the feed liquor pipeline；One end of outlet tube line, the outlet tube line is connected with described sleeve pipe column, and the other end is connected with the second storage tank.The influence that the more gradient pressure test devices of pit shaft of the embodiment of the present invention can simulate hollow ball concentration, hollow ball size, hollow ball density, discharge capacity, separator number, separator position are distributed wellbore pressure.
Description
Technical field
The present invention relates to deepwater drilling technical field more particularly to a kind of more gradient pressure test devices of pit shaft.
Background technology
The description of this part is only provided discloses relevant background information with the present invention, without constituting the prior art.
With land and shallow sea petroleum resources constant exploitations, exploration and development is increasingly turned to ocean and especially turns to deep water
Marine site.But compared with land and well drilling of shallow sea, the special natural environment of deep water sea area and complicated hydrocarbon storage condition also generate
Conventional drilling equipment and technique are difficult to the technical barrier overcome, for example, itself have to bear heaviness using anchoring positioning drilling machine
Mooring system weight, to drilling machine positioning increase difficulty；Marine riser is in addition to bearing own wt, it is also necessary to bear such as extra large
Stream and severe marine environment load；High pressure and low temperature environment at the mud line of seabed influence property of drilling fluid；Seabed is not
Stability, shallow-layer water flowing, gas hydrates control the risk to drilling well；For conventional drilling technique, it is particularly difficult to control
Pit shaft equivalent circulating density is between the operational pressure window of permission.
Only there are one fluid column gradients in the wellbore of same size for conventional marine drilling technology, i.e., bottom pressure is by the water surface
(platform) to shaft bottom mud column pressure generate, strata pressure, fracture pressure and mud column pressure gradient using the water surface as reference point,
Surplus between strata pressure and fracture pressure is smaller, and mud column weight is very big in marine riser, will bring one to drilling technology
The problem of series.If the mud density used in deepwater drilling is too small, mud column pressure is less than formation pore pressure, will lead to ground
Layer fluid invades wellbore, to bring a series of well control problem.If mud density is too big, mud column pressure is broken more than stratum
Split pressure will lead to formation fluid fracture, cave in, to the drilling wells such as bit freezing, caliper expansion, mud leakage, well-flushing difficulty occur
Problem.
For the problem that wellbore pressure control difficulty is larger, the double-gradient well drilling of external the 1990s proposition and development
Technology.5 joint industrial projects are had been carried out at present, and achieve phasic results, it is proposed that cover technical solution, including seabed more
Pump lifting drilling fluid, marine riser gaslift, marine riser dilution and note hollow glass ball etc., to realize the optimization control of wellbore pressure
System.Dual-gradient drilling technology has been obtained for widely developing at present, but due to the complexity of offshore drilling, so the technology is
Through not can solve the current problem, therefore more gradient well drilling technologies are proposed, the technology is than double-gradient well drilling energy
Strata pressure is preferably matched, makes bottom pressure in longer distance between strata pressure and fracture pressure, Neng Goujian
Change deep water complexity casing programme, effectively control wellbore annulus pressure, realizes safety drilling, while improving drilling efficiency.
Currently, more gradient well drilling technologies do not obtain field application also, also in the conceptual phase, therefore there is also many needs
It solves the problems, such as, and there is presently no the experimental provisions for exploring this respect problem.
It should be noted that above to the introduction of technical background be intended merely to it is convenient to technical scheme of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes the present invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Invention content
Based on prior art defect above-mentioned, a kind of pit shaft more gradient pressure test devices of the embodiment of the present invention, energy
Enough simulation hollow ball concentration, hollow ball size, hollow ball density, discharge capacity, separator number, separator position are to wellbore pressure point
The influence of cloth.
To achieve the goals above, the present invention provides the following technical solutions.
A kind of more gradient pressure test devices of pit shaft, including：
Casing string is arranged at intervals with multiple first pressure sensors on described sleeve pipe column；
Drill string in described sleeve pipe column is set, and the lower ending opening of the drill string is so that the drill string and the set
Tubing string is connected；
Be connected separator with the drill string, and the separator is located in described sleeve pipe column；
One end of feed liquor pipeline, the feed liquor pipeline is connected with the first storage tank, the upper end phase of the other end and the drill string
It connects, kinetic pump is provided on the feed liquor pipeline；
One end of outlet tube line, the outlet tube line is connected with described sleeve pipe column, and the other end is connected with the second storage tank.
Preferably, position of the separator in described sleeve pipe column is adjustable.
Preferably, the position interchangeable of the feed liquor pipeline and the outlet tube line.
Preferably, switch valve and flowmeter are provided on the feed liquor pipeline.
Preferably, second pressure sensor and third pressure sensing are respectively arranged on the feed liquor pipeline and outlet tube line
Device.
Preferably, further include display, the display and the first pressure sensor, second pressure sensor and the
Three pressure sensor signals connect.
By above technical solution, the beneficial effects of the present invention are：
(1) easy to operate, the drilling fluid containing hollow ball is prepared in the first storage tank and the second storage tank, is pumped by compression pump
Enter in entire dress device, by the pressure at different location in display, that is, observable pit shaft, to extrapolate different pressures
Force gradient.
(2) multiple functional, can probe into hollow ball concentration, hollow ball size, hollow ball density, discharge capacity, separator number,
The influence that separator position is distributed wellbore pressure.
(3) live drilling parameter can be used to design the covering device, therefore the result tested and scene are practical relatively more identical,
It can more illustrate the problems in live actual well drilled.
With reference to following description and accompanying drawings, the particular embodiment of the present invention is disclosed in detail, specifies the principle of the present invention
It can be in a manner of adopted.It should be understood that the embodiment of the present invention is not so limited in range.It is wanted in appended right
In the range of the spirit and terms asked, the embodiment of the present invention includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It is used in other embodiments, it is combined with the feature in other embodiments, or substitute the feature in other embodiments.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Description of the drawings
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.In the accompanying drawings：
Fig. 1 is the more gradient pressure test device structural schematic diagrams of pit shaft of embodiment of the present invention.
Specific implementation mode
It should be noted that when a parts are referred to as " being set to " another parts, it can be directly another
On a parts or there may also be parts placed in the middle.When a parts are considered as " connection " another parts,
It can be directly to another parts or may be simultaneously present parts placed in the middle.Term as used herein " is hung down
Directly ", "horizontal", "left", "right" and similar statement are for illustrative purposes based on Figure of description, are not offered as being only
One embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
Any and all combinations of relevant Listed Items.
As shown in Figure 1, an embodiment of the present invention provides a kind of more gradient pressure test devices of pit shaft, may include：Set
Tubing string 1 is arranged at intervals with multiple first pressure sensors 2 on described sleeve pipe column 1；Drill string in described sleeve pipe column 1 is set
3, the lower ending opening of the drill string 3 is so that the drill string 3 is connected with described sleeve pipe column 1；It is connected with the drill string 3
Separator 4, the separator 4 is located in described sleeve pipe column 1；One end of feed liquor pipeline 5, the feed liquor pipeline 5 is connected with
One storage tank 6, the other end are connected with the upper end of the drill string 3, and kinetic pump 7 is provided on the feed liquor pipeline 5；Outlet tube line
8, one end of the outlet tube line 8 is connected with described sleeve pipe column 1, and the other end is connected with the second storage tank 9.
In the present embodiment, it is formed after the screw thread docking that casing string 1 can pass through both ends by multiple casings, in casing string 1
Different height at mill out multiple mounting holes, first pressure sensor 2 is arranged by mounting hole on the wall of casing string 1.Casing
Column 1 connects outlet tube line 8 on the side wall of upper end, outlet tube line 8 by it is above-mentioned it is same in a manner of be provided with third pressure sensing
Device 13.
It is formed after the screw thread docking that drill string 3 equally can pass through both ends by multiple drilling rods, separator 4 is preferably eddy flow point
From device 4, it is specifically as follows one section of pipe nipple, is connected on drilling rod by the box and pin at both ends.Also, separator 4 is in casing string 1
In position it is adjustable, i.e. height of the separator 4 in casing string 1 is adjustable.Be specifically as follows, the upper and lower side of separator 4 respectively with
Top rod is connected with lower part drilling rod, and the top rod of 4 top of separator or the lower part drilling rod of lower section are located at by adjusting
Quantity, realize the adjusting of height of the separator 4 in casing string 1.
Drill string 3 is suspended on the top of casing string 1, and the upper end connects feed liquor pipeline 5.Also, feed liquor pipeline 5 and outlet tube
The position interchangeable of line 8.Specifically, feed liquor pipeline 5 and drill string 3, and, outlet tube line 8 and casing string 1 are to pass through screw thread
Being detachably connected of realizing of mode.It, can be respectively by feed liquor when needing to exchange the position of feed liquor pipeline 5 and outlet tube line 8
Pipeline 5 is disassembled with outlet tube line 8 from drill string 3 and casing string 1, then respectively connects feed liquor pipeline 5 and outlet tube line 8
It is connected on casing string 1 and drill string 3, you can realize that feed liquor pipeline 5 and the position of outlet tube line 8 are exchanged.
Feed liquor pipeline 5 by it is above-mentioned it is same in a manner of be provided with second pressure sensor 12, also, can be on feed liquor pipeline 5
It is provided with switch valve 10 and flowmeter 11.In addition, first pressure sensor 2, second pressure sensor 12 and third pressure sensing
Device 13 can be connected to display 14 by cable signal, and the barometric gradient distribution of liquid in casing string 1 is opened up in real time
Show.
The more gradient pressure test devices of pit shaft of the embodiment of the present invention can simulate hollow ball concentration, hollow ball size, sky
The number influence that wellbore pressure is distributed of bulbus cordis density, discharge capacity, the position of separator 4, separator 4.Specific experimentation
It is as follows：
1, the influence that hollow ball concentration is distributed wellbore pressure is probed into
A series of hollow ball concentration to be probed into are listed first, and good to be probed into then is configured in the first storage tank 6
The drilling fluid of minimum hollow ball concentration.Turn on the power pump 7, recycles entire drilling fluid, can be with real-time exhibition by display 14
Casing string 1 is the pressure distribution in simulation wellbore hole.
After the drilling fluid in the first storage tank 6 is all extracted, kinetic pump 7 is closed.Due to whole drilling fluid quilts
It is recycled in the second storage tank 9, therefore only need to add part hollow sphere on the basis of this concentration can configure higher concentration
Drilling fluid.Feed liquor pipeline 5 and 8 position of outlet tube line are exchanged, feed liquor pipeline 5 is made to connect the second storage tank 9, outlet tube line 8 connects
First storage tank 6, is then turned on kinetic pump 7, is the distribution feelings of the observable hollow ball concentration well-sinking pressure by display 14
Condition.The experiment that next higher hollow ball concentration can be carried out in this way finally probes into out hollow ball concentration to pit shaft pressure
The influence of power distribution.
2, the influence that hollow ball size is distributed wellbore pressure is probed into
A series of hollow ball sizes to be probed into are listed first, and good to be probed into then is configured in the first storage tank 6
The drilling fluid of minimum hollow ball size.Turn on the power pump 7, recycles entire drilling fluid, and pit shaft is observed in real time by display 14
The distribution of middle pressure.After the drilling fluid in the first storage tank 6 is all extracted, kinetic pump 7 is closed, the second storage tank 9 is exhausted
Middle drilling fluid.Then the hollow ball drilling fluid containing larger diameter is configured in the first storage tank 6 again, the pump 7 that turns on the power is surveyed
Examination passes through the distribution of pressure in display 14 in real time observation pit shaft.The reality of other size hollow balls is carried in this way
It tests, finally probes into out the influence that hollow ball size is distributed wellbore pressure.
3, the influence that discharge capacity is distributed wellbore pressure is probed into
The good drilling fluid containing hollow ball is configured in the first storage tank 6.Turn on the power pump 7, recycles entire drilling fluid, by aobvious
Show that device 14 observes the distribution of pressure in pit shaft in real time.Change discharge capacity by changing the size of switch valve 10, then passes through display
Device 14 observes the distribution of pressure in different displacements well-sinking in real time, finally probes into out the influence that discharge capacity is distributed wellbore pressure.
4, the influence that the position of separator 4 is distributed wellbore pressure is probed into
The good drilling fluid containing hollow ball is configured in the first storage tank 6.Turn on the power pump 7, recycles entire drilling fluid, by aobvious
Show that device 14 observes the distribution of pressure in pit shaft in real time.After the drilling fluid in the first storage tank 6 is all extracted, power is closed
Pump 7.Change position of the separator 4 on drill string 3, feed liquor pipeline 5 is then connected into the second storage tank 9, the connection of outlet tube line 8 the
One storage tank 6, the pump 7 that turns on the power are tested.Separator 4 is probed into successively in this way in different location, pressure in pit shaft
Distribution.
5, the influence that the number of separator 4 is distributed wellbore pressure is probed into
The number for determining the separator 4 to be probed into first, then connects a separator 4 on drill string 3.First
The good drilling fluid containing hollow ball is configured in storage tank 6.Turn on the power pump 7, recycles entire drilling fluid, is seen in real time by display 14
Examine the distribution of pressure in pit shaft.After the drilling fluid in the first storage tank 6 is all extracted, kinetic pump 7 is closed.Again in drilling rod
One separator 4 is installed on column 3, feed liquor pipeline 5 is then connected into the second storage tank 9, outlet tube line 8 connects the first storage tank 6, opens
Kinetic pump 7 is tested.The number for successively increasing separator 4 in this way probes into the distribution of pressure in pit shaft.
The invention has the advantages that：
(1) easy to operate, the drilling fluid containing hollow ball is prepared in the first storage tank 6 and the second storage tank 9, passes through kinetic pump
7 are pumped into entire dress device, are the pressure in observable pit shaft at different location by display 14, to extrapolate difference
Barometric gradient.
(2) multiple functional, hollow ball concentration, hollow ball size, hollow ball density, discharge capacity, separator 4 can be probed into
The influence that number, 4 position of separator are distributed wellbore pressure.
(3) live drilling parameter can be used to design the covering device, therefore the result tested and scene are practical relatively more identical,
It can more illustrate the problems in live actual well drilled.
It should be noted that in the description of the present invention, term " first ", " second " etc. are used for description purposes only and distinguish
Between the two and sequencing is not present in similar object, can not be interpreted as indicating or implying relative importance.In addition,
In description of the invention, unless otherwise indicated, the meaning of " plurality " is two or more.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except the example provided all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined with reference to foregoing description, but should with reference to preceding claims and this
The full scope of the equivalent that a little claims are possessed determines.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
A part for subject matter.
Claims (6)
1. a kind of more gradient pressure test devices of pit shaft, which is characterized in that including：
Casing string is arranged at intervals with multiple first pressure sensors on described sleeve pipe column；
Drill string in described sleeve pipe column is set, and the lower ending opening of the drill string is so that the drill string and described sleeve pipe column
It is connected；
Be connected separator with the drill string, and the separator is located in described sleeve pipe column；
One end of feed liquor pipeline, the feed liquor pipeline is connected with the first storage tank, and the other end is connected with the upper end of the drill string,
It is provided with kinetic pump on the feed liquor pipeline；
One end of outlet tube line, the outlet tube line is connected with described sleeve pipe column, and the other end is connected with the second storage tank.
2. the more gradient pressure test devices of pit shaft as described in claim 1, which is characterized in that the separator is in described sleeve pipe
Position in column is adjustable.
3. the more gradient pressure test devices of pit shaft as described in claim 1, which is characterized in that the feed liquor pipeline with it is described go out
The position interchangeable of liquid pipe line.
4. the more gradient pressure test devices of pit shaft as described in claim 1, which is characterized in that be provided on the feed liquor pipeline
Switch valve and flowmeter.
5. the more gradient pressure test devices of pit shaft as described in claim 1, which is characterized in that the feed liquor pipeline and outlet tube
Second pressure sensor and third pressure sensor are respectively arranged on line.
6. the more gradient pressure test devices of pit shaft as claimed in claim 5, which is characterized in that further include display, it is described aobvious
Show that device is connect with the first pressure sensor, second pressure sensor and third pressure sensor signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810071616.6A CN108457642A (en) | 2018-01-25 | 2018-01-25 | A kind of more gradient pressure test devices of pit shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810071616.6A CN108457642A (en) | 2018-01-25 | 2018-01-25 | A kind of more gradient pressure test devices of pit shaft |
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| Publication Number | Publication Date |
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| CN108457642A true CN108457642A (en) | 2018-08-28 |
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|---|---|---|---|
| CN201810071616.6A Pending CN108457642A (en) | 2018-01-25 | 2018-01-25 | A kind of more gradient pressure test devices of pit shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700776A (en) * | 2019-10-12 | 2020-01-17 | 西南石油大学 | Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device |
| CN113236159A (en) * | 2021-04-30 | 2021-08-10 | 南方海洋科学与工程广东省实验室(湛江) | Double-pipe double-gradient drilling pressure regulation and control simulation experiment device and test method |
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| CN105863611A (en) * | 2016-06-18 | 2016-08-17 | 东北石油大学 | Multi-well multi-phase annulus cuttings carrying simulator |
| CN206397496U (en) * | 2017-01-13 | 2017-08-11 | 西南石油大学 | It is a kind of to simulate the experimental provision that under balance pressure drilling stratum outlet influences on annular pressure |
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| CN1932234A (en) * | 2006-10-12 | 2007-03-21 | 中国海洋石油总公司 | Method and apparatus for realizing double-gradient well drilling |
| CN101701520A (en) * | 2009-12-04 | 2010-05-05 | 中国石油大学(华东) | Simulation experiment device for migrating rock cuttings with circulation of deepwater drilling fluid and stabilizing well wall |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700776A (en) * | 2019-10-12 | 2020-01-17 | 西南石油大学 | Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device |
| CN113236159A (en) * | 2021-04-30 | 2021-08-10 | 南方海洋科学与工程广东省实验室(湛江) | Double-pipe double-gradient drilling pressure regulation and control simulation experiment device and test method |
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Application publication date: 20180828 |