CN111271013A - Device for measuring horizontal well section rock debris removing effect - Google Patents
Device for measuring horizontal well section rock debris removing effect Download PDFInfo
- Publication number
- CN111271013A CN111271013A CN202010057385.0A CN202010057385A CN111271013A CN 111271013 A CN111271013 A CN 111271013A CN 202010057385 A CN202010057385 A CN 202010057385A CN 111271013 A CN111271013 A CN 111271013A
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- Prior art keywords
- simulation
- drill string
- mud tank
- mud
- shaft
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- 239000011435 rock Substances 0.000 title claims abstract description 34
- 230000000694 effects Effects 0.000 title claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 11
- 238000005553 drilling Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 239000013049 sediment Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 7
- 230000008021 deposition Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a device for measuring the rock debris removing effect of a horizontal well section, which belongs to the technical field of petroleum drilling and production simulation equipment and comprises a mud tank, a booster pump and a simulation drill string which are sequentially connected, wherein one end of the simulation drill string is inserted into a simulation shaft, the outlet of the simulation shaft is sequentially connected with a filter, a temperature regulating system and the mud tank, and the outlet of the booster pump is also connected with a liquid distributor at the bottom of the mud tank; and a drill column rotating system is arranged on the simulation drill column. This temperature regulation system's of device flowing through liquid stream has avoided blockking up for "clean" fluid that does not contain silt, returns mud jar recoil mud tank bottom through booster pump export fluid simultaneously, has avoided sediment deposit can also disturb jar interior fluid and make its misce bene simultaneously, add the influence that the rotatory process of drilling string can simulate to detritus deposit and clearance, detritus volume adopts earlier to clear away by the mode control that detritus make-up system added again with the filter, detritus content is stable in the mud of drilling string entry.
Description
Technical Field
The invention relates to the technical field of petroleum drilling simulation experiments, in particular to a device for measuring the rock debris removing effect of a horizontal well section.
Background
The horizontal well is a well with a well inclination angle reaching or approaching 90 degrees, and a well body drills into a well with a certain length along the horizontal direction, so that the exposed area of an oil-gas layer can be increased, and the fluid extraction efficiency is effectively improved. In the horizontal well section drilling process, when the horizontal section is longer, rock debris can sink to the lower well wall under the action of self gravity to form a rock debris bed, once the thickness of the rock debris bed reaches a certain value, the construction safety can be influenced, complex conditions such as tripping, drilling resistance and blocking are caused, and the rock debris bed needs to be cleared.
At present, two conventional methods for removing the detritus bed are available, one is a hydraulic cleaning method for flushing detritus by increasing the discharge amount of slurry, and the other is a mechanical bed breaking method for mechanically scraping the detritus bed by using a well cleaning tool. However, due to the current lack of understanding of the relevant mechanisms, in either way, the operating parameters need to be determined experimentally. The Chinese application patent CN201721607488.X discloses an experimental device for evaluating the rock carrying efficiency of directional well drilling fluid, which is used for simulating a static hydraulic cleaning process and simulating different well deviation conditions, but the test accuracy and the test progress are influenced by neglecting the influence of the rotation of a drill rod on rock debris deposition and debris removal, sediment sedimentation and blockage, difficulty in controlling sediment content and the like.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a rock debris removal effect simulation apparatus capable of simulating rotation of a drill string, which employs a method of flowing back liquid to a mud tank to stir mud and sand and liquid, so that mud and sand are uniformly mixed and are not easy to settle.
The invention adopts the following technical scheme that:
a device for measuring the rock debris removing effect of a horizontal well section,
the device comprises a mud tank, a booster pump and a simulation drill string which are sequentially connected, wherein the simulation drill string is longer than the simulation well cylinder, one end of the simulation drill string is inserted into the simulation well cylinder, the other end of the simulation drill string is movably connected with the simulation well cylinder, the simulation drill string and the simulation well cylinder enclose an annular space for fluid to flow, a solution enters the simulation well cylinder through the simulation drill string, and a liquid outlet of the simulation well cylinder is sequentially connected with a filter, a temperature regulating system and the mud tank to form a mud circulating system; a drill string rotating system is arranged on a section of the simulation drill string, which is positioned outside the simulation well cylinder, and comprises a driven gear, a rotating gear and a motor, wherein a rotor of the motor is connected with the rotating gear, the driven gear is sleeved on the outer surface of the simulation drill string, and the rotating gear is meshed with the driven gear in a matching manner; the simulation drill column is connected with the simulation shaft, the simulation drill column is connected with the outlet pipeline of the heater through a sealing bearing, and the sealing bearing is a mechanical sealing bearing used when a rotating shaft of a conventional pump is connected with a pump body; the wall thickness measuring device is arranged on the outer wall of the simulated shaft and used for measuring the thickness of deposited rock debris and reflecting the deposition condition and the debris cleaning effect of the rock debris through the thickness of the rock debris; the mud tank is also connected with a rock debris supplementing system, the outlet of the booster pump is also provided with a branch pipeline connected with a liquid distributor in the mud tank, and the liquid distributor is positioned at the bottom of the mud tank.
Furthermore, the liquid outlets of the simulation shaft are multiple and symmetrically arranged in the same plane, at least one liquid outlet is located at the bottom of the simulation shaft, the multiple liquid outlets are symmetrically arranged, so that fluid can flow more uniformly in the simulation shaft, and preferably, a flow meter is arranged on each liquid outlet pipeline, so that the flow rate of each part can be calculated conveniently, and the total mud circulation amount can be obtained after the flow rate is summed.
Preferably, the mud tank is connected with a gas pipeline for adjusting the pressure in the mud tank, so that the energy consumption of the booster pump can be reduced when the debris cleaning effect under the high-pressure debris cleaning condition is simulated.
Preferably, the rock debris complementary system includes rock debris holding vessel and feeder, be provided with the material level detector on the rock debris holding vessel, rock debris holding vessel bottom and feeder entry linkage and be provided with the control valve on the connecting line for control feeding, the feeder export is connected with the mud pot that is located its below.
Preferably, the motor is a variable frequency motor, and the rotating speed of the simulation drill string can be adjusted steplessly.
Has the advantages that:
the device can be used for simulating the rock debris removing effect of a horizontal well section and is suitable for both hydraulic debris removing and mechanical debris removing processes. This temperature regulation system's of device flowing through liquid stream has avoided blockking up for "clean" fluid that does not contain silt, returns mud jar recoil mud tank bottom through booster pump export fluid simultaneously, has avoided sediment deposit can also disturb jar interior fluid and make its misce bene simultaneously, add the influence that the rotatory process of drilling string can simulate to detritus deposit and clearance, the detritus adopts earlier to clear away the mode control of adding by detritus make-up system again with the filter, detritus content is stable in the mud of drilling string entry.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic view of a liquid distributor;
FIG. 3 is a schematic view of a drill string rotation system;
FIG. 4 is a schematic view of a rock debris replenishment system;
in the figure, 1, a mud tank; 2. a booster pump; 3. a liquid distributor; 31. a flat nozzle; 4. simulating a drill string;
5. simulating a shaft; 6. a filter; 7. a temperature regulation system; 8. a back pressure valve; 9. a flow meter; 10. a drill string rotation system; 101. a driven gear; 102. a rotating gear; 103. a motor; 11. a wall thickness measuring device; 12. A rock debris replenishment system; 121. a rock debris storage tank; 122. a feeding machine; 13. a gas line.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Example (b):
a device for measuring the rock debris removing effect of a horizontal well section,
as shown in figure 1, the device comprises a mud tank 1, a booster pump 2 and a simulation drill string 4 which are sequentially connected, wherein the simulation drill string 4 is longer than a simulation shaft 5, one end of the simulation drill string is inserted into the simulation shaft 5, the other end of the simulation drill string is connected with the simulation shaft 5 through a sealing bearing, an annular space is enclosed by the simulation drill string 4 and the simulation shaft 5 and used for fluid flowing, a solution enters the simulation shaft through the simulation drill string, and a liquid outlet of the simulation shaft 5 is sequentially connected with a filter 6, a temperature regulating system 7, a back pressure valve 8 and the mud tank 1, so that a mud circulating system is formed.
The number of the liquid outlets of the simulation shaft 5 is 2, the liquid outlets are respectively and symmetrically distributed at the top and the bottom of the simulation shaft 5, and the two liquid outlets are respectively communicated with the filter 6 through branch pipelines with flow meters 9.
The outlet of the booster pump 2 is connected with a branch pipeline which is communicated with a liquid distributor 3 at the bottom of the mud tank 1.
The mud tank 1 is connected with a gas pipeline 13, and the gas charging and discharging body is used for adjusting the pressure in the mud tank 1, so that the energy consumption of the booster pump can be reduced when the chip cleaning effect under the high-pressure chip cleaning condition is simulated.
As shown in fig. 2, the liquid distributor 3 is a circular ring, and 6 flat nozzles 31 are uniformly distributed on the circumference of the bottom side surface.
As shown in fig. 3, a drill string rotating system 10 is arranged on a section of the simulated drill string 4 outside the simulated wellbore 5, the drill string rotating system 10 includes a driven gear 101, a rotating gear 102 and a motor 103, the motor 103 is a variable frequency motor, a rotor of the motor 103 is connected with the rotating gear 102, the driven gear 101 is sleeved on the outer surface of the simulated drill string 4, and the rotating gear 102 is engaged with the driven gear 101 in a matching manner; the simulation drill string 4 is connected with the simulation well bore 5, and the simulation drill string 4 is connected with the outlet pipeline of the heater 3 through a sealing bearing, wherein the sealing bearing is a mechanical sealing bearing used when a rotating shaft of a conventional pump is connected with a pump body; as shown in figure 1, a wall thickness measuring device 11 is arranged on the outer wall of the simulation shaft 5 and used for measuring the thickness of deposited rock debris and reflecting the deposition condition and the debris cleaning effect of the rock debris through the thickness of the rock debris.
As shown in fig. 4, the mud tank 1 is further connected with a rock debris supplementing system 12, the rock debris supplementing system 12 includes a rock debris storage tank 121 and a feeding machine 122, a material level detector is arranged on the rock debris storage tank 121, the bottom of the rock debris storage tank 121 is connected with an inlet of the feeding machine 122, a control valve is arranged on a connecting pipeline for controlling feeding, and an outlet of the feeding machine 122 is connected with the mud tank 1 below the feeding machine.
The outlet of the booster pump 2 is provided with a pressure gauge and a thermometer for measuring the temperature and the pressure of the circulating slurry.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (4)
1. A device for measuring the debris removal effect of a horizontal well section comprises a mud tank, a booster pump and a simulation drill string which are sequentially connected, wherein one end of the simulation drill string is inserted into a simulation shaft, the other end of the simulation drill string is movably connected with the simulation shaft, a liquid outlet of the simulation shaft is sequentially connected with a filter and the mud tank, and the simulation drill string is connected with the simulation shaft, the simulation drill string and an outlet pipeline of the booster pump through sealed bearings; a wall thickness measuring device is arranged on the outer wall of the simulated shaft; the mud tank is also connected with a rock debris supplement system, which is characterized in that,
a temperature adjusting system is arranged between the filter and the mud tank;
the outlet of the booster pump is also provided with a branch pipeline connected with a liquid distributor in the mud tank, and the liquid distributor is positioned at the bottom of the mud tank;
the drill string rotating system is arranged on one section of the simulation drill string, which is positioned outside the simulation well cylinder, and comprises a driven gear, a rotating gear and a motor, wherein a rotor of the motor is connected with the rotating gear, the driven gear is sleeved on the outer surface of the simulation drill string, and the rotating gear is meshed with the driven gear in a matching manner.
2. The apparatus of claim 1, wherein the plurality of exit ports of the simulated well bore are symmetrically arranged in the same plane, and at least one exit port is located at the bottom of the simulated well bore.
3. The apparatus of claim 2, wherein the outlets of the simulated wellbore are each connected to the filter by branch lines and each branch line is provided with a flow meter.
4. The apparatus of claim 1, wherein the mud tank is connected with a gas pipeline, and the pressure in the mud tank is adjusted by supplementing the exhaust gas, so that the pressure of the whole experimental system is changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010057385.0A CN111271013A (en) | 2020-01-19 | 2020-01-19 | Device for measuring horizontal well section rock debris removing effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010057385.0A CN111271013A (en) | 2020-01-19 | 2020-01-19 | Device for measuring horizontal well section rock debris removing effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271013A true CN111271013A (en) | 2020-06-12 |
Family
ID=70998799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010057385.0A Pending CN111271013A (en) | 2020-01-19 | 2020-01-19 | Device for measuring horizontal well section rock debris removing effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111271013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161661A (en) * | 2020-09-28 | 2021-01-01 | 西南石油大学 | Debris flow measuring device of sand discharge pipeline and calibration method thereof |
-
2020
- 2020-01-19 CN CN202010057385.0A patent/CN111271013A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161661A (en) * | 2020-09-28 | 2021-01-01 | 西南石油大学 | Debris flow measuring device of sand discharge pipeline and calibration method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200612 |
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| WD01 | Invention patent application deemed withdrawn after publication |