CN114575786A - Long horizontal well detritus bed clearing device - Google Patents
Long horizontal well detritus bed clearing device Download PDFInfo
- Publication number
- CN114575786A CN114575786A CN202210246977.6A CN202210246977A CN114575786A CN 114575786 A CN114575786 A CN 114575786A CN 202210246977 A CN202210246977 A CN 202210246977A CN 114575786 A CN114575786 A CN 114575786A
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- CN
- China
- Prior art keywords
- detritus bed
- horizontal well
- long horizontal
- blades
- detritus
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a long horizontal well detritus bed cleaning device, which relates to the technical field of oil drilling detritus bed cleaning and comprises a female joint, water holes, a male joint, a body and blades, wherein the female joint, the body and the male joint are sequentially connected, the blades are arranged between the bodies, a plurality of water holes are arranged on the bodies, the water holes are simultaneously opened and jet when a drill rod rotates, and the device is detachable and connected with the drill rod through screw threads. The invention has simple structure and convenient operation, can destroy and remove the detritus bed by hydraulic and mechanical double functions, and has high cleaning efficiency.
Description
Technical Field
The invention relates to the technical field of petroleum drilling detritus bed clearing, in particular to a detritus bed clearing device for a long horizontal well.
Background
In order to improve the yield and the final extraction degree of a single well, the design length of a horizontal well section of the horizontal well is gradually increased, the length of the horizontal section is generally more than 2000m in the current foreign unconventional oil and gas development, 3000m horizontal sections are very common, and the length of the maximum horizontal well section breaks through 5000 m. Horizontal wells, especially long horizontal section horizontal wells, face a plurality of technical challenges, and the long horizontal section drilling process faces the problems of low rock carrying efficiency of drilling fluid, easy accumulation of inclined well sections to form a detritus bed and the like, so that the problems of large friction torque, serious pressure supporting, more complicated conditions of drilling resistance clamping during drilling up/down, serious later-stage electrical measurement and casing pipe descending resistance, and large difficulty in reaching the bottom once are caused. The existing well cleaning process technology mainly comprises the steps of optimizing drilling parameters, improving drilling fluid performance, shortening and lifting and falling and the like, and the operation can greatly increase the operation cost. The operation time is not increased and special requirements on drilling equipment are not required by using the cutting bed cleaning device to operate the well cleaning, so that the cost can be greatly saved and the well cleaning effect is good compared with other methods.
Disclosure of Invention
Aiming at the problems, the invention provides a long horizontal well detritus bed clearing device, wherein protruding blades of a protruding tool repair an irregular well wall through a mechanical hanging cutting effect, the protruding blades are connected with a drill rod through screw threads to form a drilling tool assembly, the drilling tool transmits torque rotation, the blades rotate to induce an annular drilling fluid to generate a spiral flow structure and transmit the spiral flow structure along the upward returning direction of the drilling fluid, detritus particles are inhibited from settling to form a detritus bed, and detritus clearing efficiency is improved.
The invention adopts the following technical scheme: the utility model provides a long horizontal well detritus bed clearing device, includes female joint, water hole, male joint, body, blade, female joint, body, male joint connect gradually, be equipped with the blade between the body, be equipped with a plurality of water holes on the body, the water hole is opened and is efflux simultaneously when the drilling rod is rotatory, long horizontal well detritus bed clearing device can dismantle, is connected with the drilling rod through the screw thread.
Preferably, the blades are V-shaped blades, the pitch is 1100mm, the opening direction of the V-shaped blades is opposite to the rotation direction of the drill rod, and the blades are symmetrically distributed by taking the axial end point of each blade as a symmetry.
Preferably, the number of the blades is 6, and the blades are axially and uniformly distributed.
Preferably, the helix angle achieves the maximum axial velocity at 40 ° to 50 ° and the helix angle achieves the maximum resultant velocity at 25 ° to 35 °. When a single group of detritus bed cleaning device is adopted, the helical angle of the blade is 25-35 degrees. If two groups of rock debris bed clearing devices are adopted, the helical angle of the front blade is 15-25 degrees to improve the tangential speed, and the helical angle of the rear blade is 40-50 degrees to improve the axial migration speed of rock debris, so that the rock debris is beneficial to returning out.
Preferably, the whole length of the long horizontal well debris bed cleaning device is 0.75m-1 m. Can effectually clear away the detritus bed and get rid of the detritus and go up the ring space, less to frictional resistance influence in the work progress when reaching the high-efficient purpose of carrying the rock. After the detritus bed cleaning device is put into the well bottom, the friction torque of the well bottom can be increased to a certain degree. The larger the bending rigidity and the shearing rigidity are, the larger the positive pressure generated by the rigidity of the pipe column to the well wall is, and the larger the friction resistance and the friction resistance torque applied to the pipe column are, so that the rigidity of the rock debris bed cleaning device can be effectively limited by reducing the length of the rock debris bed cleaning device as much as possible.
Preferably, the installation position of the long horizontal well debris bed clearing device on the drill rod is as follows:
in the formula: taking the carrying factor of the alpha-detritus bed clearing device as 1.12; taking an acceleration factor of the beta-debris removing device as 1.18; vs-a medium particle slip velocity; vaAnd (5) returning the annular space.
The invention has the beneficial effects that: simple structure, convenient operation can destroy and clear away the detritus bed through two effects of water conservancy, machinery simultaneously, and clean efficiently.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.
FIG. 1 is a schematic view of the structure of the present invention.
In the figure:
1-female joint, 2-water hole, 3-male joint, 4-body and 5-blade.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The invention is further illustrated with reference to the following figures and examples.
As shown in figure 1, a long horizontal well detritus bed clearing device, including a long horizontal well detritus bed clearing device, its characterized in that, including female joint 1, water hole 2, male joint 3, body 4, blade 5, female joint 1, body 4, male joint 3 connect gradually, be equipped with blade 5 between the body 4, be equipped with a plurality of water holes 2 on the body 4, water hole 2 opens simultaneously and efflux when the drilling rod is rotatory, and the rotatory detritus bed of destruction of cooperation blade 5, long horizontal well detritus bed clearing device can dismantle, is connected with the drilling rod through the screw thread.
The blades 5 are V-shaped blades, the thread pitch is 1100mm, and the opening direction of the V-shaped blades and the drill rod are arranged. The rotation directions are opposite and are symmetrically distributed by taking the axial terminal point of the blade 5 as a symmetrical distribution.
The number of the blades 5 is 6, and the blades are uniformly distributed in the axial direction.
In the embodiment, the inner diameter of the well bore is ID12.25in, the outer diameter of the drill string is OD5in, and the density of rock debris is 2.25g/cm3The particle diameter is 4.20mm, and the density of the drilling fluid is 1.25g/cm3The discharge capacity is 3.800L/min. The inclination angles of the well at the well depth of 1642m-2040m reach stable inclination at 61.99 degrees and 65.67 degrees, and the invention is added in this section.
The helix angle of the blades 5 is 25 deg..
The whole length of the long horizontal well detritus bed cleaning device is 1 m.
The installation position of the long horizontal well detritus bed clearing device on the drill rod is as follows:
annular area:
flow rate:
annular back velocity:
the slip velocity of the debris particles was calculated using the Moore formula:
fluidity index:
consistency coefficient:
then the drilling fluid viscosity at the circulation return speed of 0.999926m/s can be obtained:
assume medium particle Reynolds number 1<Rep<2000, then its slip speed can be:
and (4) reversely calculating the Reynolds number of the particles:
it is reasonable to use the Moore formula for medium particle Reynolds numbers to calculate the cuttings slip velocity, indicating that the assumed particle Reynolds number range is appropriate.
And correcting the slip speed of the large-displacement well casing:
in addition, the invention is added into the well, and the carrying factor of the alpha-detritus bed clearing device is taken as 1.12 in consideration of the influence of the invention; the acceleration factor of the beta-debris removing device is 1.18, and the installation distance of the device is as follows:
the results of the laboratory effect of removing the detritus bed according to the invention are shown in the following table:
| rock debris injection amount g | Rock debris discharge g | Residual amount g of rock debris in well bore | Cleaning efficiency% |
| 33476 | 30282 | 3193 | 90.5 |
The rock debris removing effect of the invention is good.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a long horizontal well detritus bed clearing device, its characterized in that, includes female joint (1), water hole (2), male joint (3), body (4), blade (5), female joint (1), body (4), male joint (3) connect gradually, be equipped with blade (5) between body (4), be equipped with a plurality of water holes (2) on body (4), water hole (2) are opened and are efflux simultaneously when the drilling rod is rotatory, long horizontal well detritus bed clearing device can dismantle, is connected with the drilling rod through the screw thread.
2. The device for removing the detritus bed of the long horizontal well, as claimed in claim 1, wherein the blades (5) are V-shaped blades, the pitch is 1100mm, the opening direction of the V-shaped blades is opposite to the rotation direction of the drill rod, and the V-shaped blades are symmetrically distributed with the axial end point of the blades (5).
3. The device for removing the detritus bed of the long horizontal well, as claimed in claim 1, wherein the number of the blades (5) is 6, and the blades are axially and uniformly distributed.
4. The long horizontal well detritus bed clearing device of claim 1, wherein if the blades (5) are a group of detritus bed clearing devices, the helix angle is 25-35 °, if two groups of detritus bed clearing devices are adopted, the helix angle of the front blade is 15-25 °, and the helix angle of the rear blade is 40-50 °.
5. The device for removing the detritus bed of the long horizontal well of claim 1, wherein the overall length of the device is 0.75-1 m.
6. The long horizontal well detritus bed clearing device of claim 1, wherein the long horizontal well detritus bed clearing device is mounted on a drill rod at a position that:
in the formula: taking the carrying factor of the alpha-detritus bed clearing device to be 1.12; taking an acceleration factor of the beta-debris removing device as 1.18; vs-a medium particle slip velocity; vaAnd (5) returning the annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246977.6A CN114575786A (en) | 2022-03-14 | 2022-03-14 | Long horizontal well detritus bed clearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246977.6A CN114575786A (en) | 2022-03-14 | 2022-03-14 | Long horizontal well detritus bed clearing device |
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| Publication Number | Publication Date |
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| CN114575786A true CN114575786A (en) | 2022-06-03 |
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| CN202210246977.6A Pending CN114575786A (en) | 2022-03-14 | 2022-03-14 | Long horizontal well detritus bed clearing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116752915A (en) * | 2023-08-15 | 2023-09-15 | 东北石油大学三亚海洋油气研究院 | Power rotor device for hydraulic-magnetic transmission borehole cleaning tool |
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2022
- 2022-03-14 CN CN202210246977.6A patent/CN114575786A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116752915A (en) * | 2023-08-15 | 2023-09-15 | 东北石油大学三亚海洋油气研究院 | Power rotor device for hydraulic-magnetic transmission borehole cleaning tool |
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