CN111058761A - Manufacturing method of double-speed double-center drilling speed-increasing equipment - Google Patents
Manufacturing method of double-speed double-center drilling speed-increasing equipment Download PDFInfo
- Publication number
- CN111058761A CN111058761A CN201911409751.8A CN201911409751A CN111058761A CN 111058761 A CN111058761 A CN 111058761A CN 201911409751 A CN201911409751 A CN 201911409751A CN 111058761 A CN111058761 A CN 111058761A
- Authority
- CN
- China
- Prior art keywords
- cutting head
- speed
- double
- outer cylinder
- drilling
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 100
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000005520 cutting process Methods 0.000 claims abstract description 169
- 239000012530 fluid Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000010248 power generation Methods 0.000 claims description 31
- 230000001133 acceleration Effects 0.000 claims description 20
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 238000009826 distribution Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000012886 Vertigo Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a manufacturing method of double-speed double-center drilling speed-up equipment, which comprises the following steps: forming a flow dividing device, an outer cylinder, a downhole power device, a righting device, a large cutting head and a small cutting head; and assembling the flow dividing device, the outer cylinder, the underground power device, the centralizing device, the large cutting head and the small cutting head to form the double-speed double-center drilling speed-increasing equipment. The flow dividing device can be connected with an upper drill string and divides drilling fluid in the drilling fluid, the flow dividing device and the centering device can be fixedly connected through the outer cylinder, the underground power device is mounted inside the outer cylinder and can be connected with the small cutting head to drive the small cutting head to rotate, the centering device can allow the drilling fluid to pass through while playing a role of centering, the large cutting head can be connected with the centering device and rotate along with the upper drill string, and the small cutting head and the large cutting head are arranged in a non-centrosymmetric mode. The method can manufacture double-speed double-center drilling speed-increasing equipment and solve the problem that the linear speed of the central point of the drill bit is zero.
Description
Technical Field
The invention belongs to the technical field of oil and gas drilling speed increasing, and particularly relates to a manufacturing method of double-speed double-center drilling speed increasing equipment capable of increasing drilling speed.
Background
In the oil and gas well drilling engineering, how to increase the drilling speed is an important subject of research. Although the drilling speed is improved to some extent by optimizing the design of the drill bit structure, for example, developing new drill bit tooth materials, higher performance teeth, etc., the problem that the linear speed of the central point of the drill bit is zero and the linear speed near the central point affects the drilling speed during drilling is still not solved.
Moreover, the inventors have found that this effect is particularly pronounced in PDC bits which are currently in large use. The bit that is pulled out of service is also difficult to find, and this problem is one of the key problems affecting the speed increase of the well. The inventor considers that the double-speed double-center drilling technology is favorable for solving the problem that the linear velocity of the central point of the drill bit is zero, so that the drilling speed can be further increased.
Disclosure of Invention
The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, the invention aims to manufacture a double-speed double-center drilling speed-increasing device, and solves the problem that the linear speed of the central point of a drill bit is zero when drilling.
In order to achieve the above object, the present invention provides a method for manufacturing a two-speed dual-core drilling acceleration device. The manufacturing method comprises the following steps: forming a flow dividing device, an outer cylinder, a downhole power device, a righting device, a large cutting head and a small cutting head; assembling the flow dividing device, the outer cylinder, the underground power device, the centralizing device, the large cutting head and the small cutting head to form double-speed double-center drilling speed-increasing equipment; wherein the large cutting head has a first centerline, a through bore disposed along the first centerline, and a first diameter, and the small cutting head has a second centerline and a second diameter, the second diameter being smaller than the first diameter, the second centerline being parallel to but not coincident with the first centerline; the outer cylinder is sleeved outside the underground power device to form an annular space, the left end of the outer cylinder is connected with the upper drill string through the flow dividing device, and the right end of the outer cylinder is connected with the large cutting head through the righting device, so that the large cutting head can drill under the driving of the upper drill string, and the underground power device rotates under the driving of the upper drill string; the downhole power device is provided with a power generation part and a rotation output part, wherein the power generation part can generate power and rotate the rotation output part, and the rotation output part passes through the through hole of the large cutting head and is connected with the small cutting head and can drive the small cutting head to rotate; the righting device is configured to right the power generation portion, the rotary output portion, or the small cutting head; the flow divider is configured to separate drilling fluid in the upper drill string into a first flow that enters the annulus and lubricates the large cutting head and a second flow that enters the power generation portion of the downhole power plant.
In an exemplary embodiment of the invention, the distance between the first centerline and the second centerline may be 1/50-1/10 of the first diameter.
In an exemplary embodiment of the invention, the ratio of the angular velocity of the small cutting head to the angular velocity of the large cutting head may be 4 to 7: 1.
in an exemplary embodiment of the invention, the cutting head may have a jet channel with a decreasing radial cross-sectional area, one end of the jet channel receiving the second fluid flow through the power generation portion and emitting from the other end of the jet channel.
In an exemplary embodiment of the invention, the righting device may have a quincunx-like cavity capable of righting the power generation portion or the rotational output portion, or capable of righting the portion of the cutting bit coupled with the rotational output portion.
In an exemplary embodiment of the invention, the flow diversion device may have a water diversion member, wherein the water diversion member is provided with a central bore and a plurality of water diversion bores, the plurality of water diversion bores being capable of communicating drilling fluid in an upper drill string with the annulus and forming the first flow, the central bore being capable of communicating drilling fluid of an upper drill string with the power generation section and forming the second flow.
Compared with the prior art, the beneficial effects of the invention comprise at least one of the following:
1. the double-speed double-core drilling speed-increasing equipment can be manufactured;
2. the double-speed double-core drilling speed-up equipment has good stability and long service life;
3. the double-speed double-center drilling speed-increasing equipment can drive the small cutting head to rotate by the shunted drilling fluid;
4. the double-speed double-center drilling speed-up equipment enables the small cutting head to rotate at high speed under the driving of the underground power device and revolve around the central axis of the large cutting head at the same time by arranging the large cutting head and the small cutting head in a non-centrosymmetric manner; therefore, the problems that the theoretical cutting speed of the central point of the drill bit is zero and the linear speed near the central point is low are solved, and the drilling speed is favorably improved.
Drawings
FIG. 1 illustrates a process flow diagram of one exemplary embodiment of a method of manufacturing a two-speed, dual-center drilling acceleration apparatus in accordance with the present invention;
FIG. 2 is a schematic diagram of a two-speed dual-center drilling acceleration device made by the method of manufacture of FIG. 1;
FIG. 3 illustrates a schematic structural view of a flow diversion apparatus in an exemplary embodiment of a method of manufacturing a two-speed, bi-center drilling acceleration apparatus in accordance with the present invention;
FIG. 4 shows a right side view of FIG. 3;
FIG. 5 shows a pictorial representation of FIG. 3;
FIG. 6 illustrates a schematic structural view of a centralizer assembly according to an exemplary embodiment of a method of manufacture of a two-speed dual-core drilling acceleration apparatus according to the present invention;
FIG. 7 shows a right side view of FIG. 6;
FIG. 8 shows a pictorial representation of FIG. 6;
FIG. 9 illustrates a pictorial diagram of an exemplary embodiment of a method of manufacturing a two speed, bi-center drilling acceleration apparatus in accordance with the present invention.
The reference numerals are explained below:
1-flow dividing device, 2-outer cylinder, 3-underground power device, 4-righting device, 5-big cutting head, 6-small cutting head, 1 a-water dividing hole, 1 b-central hole, 4 a-inner boss and 4 b-concave surface.
Detailed Description
Hereinafter, a method for manufacturing a two-speed dual-core drilling acceleration apparatus according to the present invention will be described in detail with reference to exemplary embodiments. It should be noted that "first," "second," and the like are merely for convenience of description and for ease of distinction, and are not to be construed as indicating or implying relative importance. "left," "right," "inner," and "outer" are merely for convenience of description and relative orientation or positional relationship, and do not indicate or imply that the referenced components must have that particular orientation or position.
In general, to solve the problem of zero linear velocity at the center point of the drill bit, the inventor proposes a method for manufacturing a two-speed dual-center drilling speed-increasing device. The double-speed double-center well drilling speed-increasing equipment manufactured by the method is characterized in that a large cutting head (also called a large drill bit) with a first central line, a through hole arranged along the first central line and a first diameter is arranged; and a small cutting head (also referred to as a small drill) having a second centerline and a second diameter; and ensuring that the second diameter is smaller than the first diameter, the second centerline being parallel to but not coincident with the first centerline to achieve "bi-centering". At the same time, the large cutting head receives a first power for rotary drilling through the upper drill string and is provided with lubrication by drilling fluid from the upper drill string; the small cutting head obtains a second power for rotary drilling through the downhole power device, which is equivalent to the small cutting head rotating around the second central line, and the upper drill string can also drive the downhole power device to further drive the small cutting head to rotate, which is equivalent to the small cutting head revolving around the first central line, thereby realizing double speed.
FIG. 1 illustrates a process flow diagram of one exemplary embodiment of a method of manufacturing a two-speed, dual-center drilling acceleration apparatus according to the present invention.
In an exemplary embodiment of the present invention, as shown in FIG. 1, a method of manufacturing a two-speed dual-core drilling acceleration apparatus includes the steps of: the parts of the double-speed double-core drilling speed-increasing equipment such as a flow dividing device, an outer cylinder, an underground power device, a centering device, a large cutting head and a small cutting head are respectively formed. The flow dividing device, the outer cylinder, the underground power device, the centralizing device, the large cutting head and the small cutting head can adopt one or more of the modes of casting forming, forging, welding, lathe processing and the like. For example, the flow divider may be formed by casting the cylinder and the water dividing member, and then welding the water dividing member in the cylinder, or may be integrally formed by casting. Here, the formation of the flow dividing device, the outer cylinder, the downhole power device, the centralizer, the large cutting head and the small cutting head is not divided in sequence, and may or may not be performed simultaneously. However, the present invention is not limited thereto as long as the parts of the required structure and the machining accuracy can be formed.
And assembling the formed flow dividing device, the outer cylinder, the underground power device, the righting device, the large cutting head and the small cutting head according to the corresponding connection relationship to form the double-speed double-center drilling speed-increasing equipment. The parts are not sequentially assembled, and can be assembled simultaneously or not, so long as the parts can be assembled to form the two-speed double-center drilling speed-increasing equipment. For example, the flow divider, the outer cylinder, the centralizer and the large cutting head may be coupled to form a first cutting portion, the downhole power unit and the small cutting head may be coupled to form a second cutting portion, and the first cutting portion and the second cutting portion may be coupled to form a two-speed, two-center drilling speed-up apparatus. The connection mode among all parts can be threaded connection, and the threaded connection can be used for facilitating the assembly of the double-speed double-core drilling speed-increasing equipment and the replacement of the parts. However, the present invention is not limited thereto as long as the respective components can be connected in the corresponding connection relationship (for example, snap-fit).
FIG. 2 is a schematic diagram illustrating an exemplary embodiment of a two-speed dual-center drilling acceleration apparatus made by the method of manufacture of FIG. 1.
As shown in fig. 2, the two-speed dual-core drilling acceleration apparatus comprises a flow divider 1, an outer cylinder 2, a downhole power unit 3, a centralizer 4, a large cutting head 5 and a small cutting head 6.
The large cutting head 1 has a first centre line (i.e. parallel to the left-right direction in fig. 2), a through going hole arranged along said first centre line, and a first diameter. The cutting bit 6 has a second centre line and a second diameter. And, the second diameter is smaller than the first diameter, and the second centerline is parallel to but not coincident with the first centerline. That is, both the first center line and the second center line are parallel to the left-right direction in fig. 2, but a predetermined distance exists therebetween. For example, the distance between the first centerline and the second centerline may be 1/50-1/10 of the first diameter. As another example, the distance between the first centerline and the second centerline may be 1/20 for the first diameter.
The outer cylinder body 2 is sleeved outside the downhole power device 3, and an annular space is formed between the outer cylinder body and the downhole power device. And the left end of the outer cylinder 2 is connected with an upper drill string (not shown in fig. 2) through the diversion device 1, and the right end of the outer cylinder 2 is connected with the large cutting head 5 through the centering device 4, so that the large cutting head 5 can drill under the driving of the upper drill string, and the downhole power device 3 rotates under the driving of the upper drill string. That is, the diverter device 1, the outer cylinder 2, the centralizer 4 and the large cutting head 5 are fixed integrally with the upper drill string and are rotatable together.
The downhole power unit 3 may have a power generation portion and a rotation output portion. Wherein the power generation section (e.g., the left section of the downhole power unit 3 in fig. 2) is capable of generating power and rotating the rotation output section. Further, the downhole power device can also form an annular space with the outer cylinder, and a power generation part of the downhole power device is fixedly connected with one or more of the upper drill string, the flow dividing device, the outer cylinder, the centering device and the large cutting head, so that the downhole power device can be driven by the upper drill string to rotate. The rotary output portion (e.g., the right portion of the downhole power unit 3 in fig. 2) is coupled to the small cutting head through the through hole of the large cutting head and can drive the small cutting head to rotate. That is, the downhole power device can generate power through the power generation part and drive the small cutting head to rotate around the second center line through the rotation output part; simultaneously, due to the drive of the upper drill string, the underground power device and the small cutting head can also revolve around the first central line. Thus, the angular velocity of the small cutting head will be greater than the angular velocity of the large cutting head. For example, the ratio of the angular velocity of the small cutting head to the angular velocity of the large cutting head may be 2 to 9: 1. for another example, the ratio of the angular velocity of the small cutting head to the angular velocity of the large cutting head may be 4 to 7: 1.
as shown in fig. 2, the centralizing means is arranged to centralize the power generating section of the downhole power means, thereby centralizing the small cutting head. That is, the centralizer is capable of centralizing the deflection caused by the rotation of the cutting head. However, the present invention is not limited thereto. For example, the centralizer may also be arranged to centralize the rotary output of the downhole power unit; or directly, centralize the cutting head, e.g., centralize the portion of the cutting head coupled to the rotational output. For example, the righting device may have a quincunx-like cavity that can more stably right the power generation portion or the rotational output portion, or can more stably right the portion of the cutting bit coupled with the rotational output portion.
The flow divider is configured to separate the drilling fluid in the upper drill string into a first flow and a second flow. The first fluid flow enters an annulus between the outer barrel and the downhole power plant and is able to flow to the large cutting head to lubricate the large cutting head. The second fluid stream enters a power generation section of the downhole power unit and serves as a power source for the power generation section. That is, the power generation section can convert the power of the second fluid flow into the rotational motion of the rotation output section. For example, the flow diversion device can have a water diversion member that can have a central aperture and a plurality of water diversion apertures disposed thereon. Wherein the plurality of cutwater holes are capable of communicating drilling fluid in an upper drill string with the annulus and forming the first fluid stream; the central bore is configured to communicate drilling fluid of an upper drill string with the power generation section and form the second fluid stream.
In addition, the small cutting head may also have a jet channel with a gradually decreasing radial cross-sectional area. One end of the jetting passage receives the second fluid flow passing through the power generation portion and is jetted out from the other end of the jetting passage to be jetted toward an object to be drilled (e.g., a surface to be drilled).
FIG. 2 is a schematic diagram of a two-speed dual-core drilling acceleration device made by the method of manufacture of FIG. 1. FIG. 3 illustrates a schematic structural view of a flow diversion apparatus according to an exemplary embodiment of a method of manufacturing a two-speed, bi-center drilling acceleration apparatus according to the present invention. FIG. 4 shows a right side view of FIG. 3; and FIG. 5 shows a pictorial representation of FIG. 3.
As shown in fig. 2, the two-speed dual-core drilling acceleration apparatus comprises a flow divider 1, an outer cylinder 2, a downhole power unit 3, a centralizer 4, a large cutting head 5 and a small cutting head 6.
In the exemplary embodiment, the left end of the outer cylinder 2 is connected with the upper drill string through the diversion device 1, and the right end of the outer cylinder 2 is connected with the large cutting head 5 through the centralizing device 4, so that the rotation torque of the upper drill string is transmitted to the large cutting head 5, and the large cutting head 5 can drill rotationally under the driving of the upper drill string. The outer cylinder 2 is indirectly connected with the upper drill string, and the outer cylinder 2 is indirectly connected with the large cutting head 5. For example, the left end of the outer cylinder 2 is connected with the right end of the shunt device 1 through threads, and the left end of the shunt device 1 is connected with the upper drill string through threads, so that the outer cylinder 2 is connected with the upper drill string, and the outer cylinder 2 can be driven by the upper drill string to rotate; the right end of the outer cylinder 2 is in threaded connection with the left end of the righting device 4, and the right end of the righting device 4 is in threaded connection with the left end of the large cutting head 5, so that the righting device 4 and the large cutting head 5 can rotate together with the outer cylinder 2. However, the present invention is not limited thereto, and the upper drill string and the flow dividing device, the flow dividing device and the outer cylinder, the outer cylinder and the centralizer, and the centralizer and the large cutting head may be connected by other means (for example, snap-fitting), as long as the connection of the upper drill string, the flow dividing device, the outer cylinder, the centralizer and the large cutting head and the transmission of the torque of the upper drill string can be realized.
In the present exemplary embodiment, the downhole power unit 3 is disposed inside the outer cylinder 2, and the downhole power unit 3 and the outer cylinder 2 are in a fixed state therebetween. The underground power device 3 can rotate together with the outer cylinder body 2 under the driving of an upper drill string, and an annular space through which drilling fluid can flow is formed between the inside of the outer cylinder body 2 and the outside of the underground power device 3. For example, the downhole power unit 3 is disposed inside the outer cylinder 2 and is not in contact with the outer cylinder 2, and the space between the inside of the outer cylinder 2 and the outside of the downhole power unit 3 is an annulus through which drilling fluid flows.
The left end of the underground power device 3 is fixedly connected with the water diversion component of the flow diversion device 1 through threads, so that the outer cylinder body 2 and the underground power device 3 are in a fixed state. The upper drill column rotates to drive the flow dividing device 1 to rotate, and the flow dividing device 1 rotates to drive the outer cylinder 2 and the underground power device 3 to rotate. Of course, there are many ways of securing the outer barrel 2 to the downhole power unit 3. For example, a fastener may be provided between the inner wall of the outer cylinder 2 and the downhole power unit 3, which fastener is capable of allowing the passage of drilling fluid (e.g., the first fluid stream) while securing the outer cylinder 2 and the downhole power unit 3. However, the invention is not limited to this, and the outer cylinder and the downhole power device may be fixed in other ways as long as the outer cylinder and the downhole power device can be fixedly arranged.
In the exemplary embodiment, a flow divider is provided that is capable of dividing the drilling fluid in the upper drill string into a first flow and a second flow. The first fluid flow enters an annulus between the outer barrel and the downhole power plant and is able to flow to the large cutting head to lubricate the large cutting head. The second fluid stream enters a power generation section of the downhole power unit and serves as a power source for the power generation section. That is, the power generation section can convert the power of the second fluid flow into the rotational motion of the rotation output section. For example, the flow diversion device can have a water diversion member that can have a central aperture and a plurality of water diversion apertures disposed thereon. Wherein the plurality of cutwater holes are capable of communicating drilling fluid in an upper drill string with the annulus and forming the first fluid stream; the central bore is configured to communicate drilling fluid of an upper drill string with the power generation section and form the second fluid stream. For example, as shown in fig. 3-5, the flow diversion device 1 can be a cylinder-like structure. The water distribution component is arranged in the cylinder body along the radial section and comprises a central hole 1b and a plurality of water distribution holes 1a which are arranged around the central hole 1b and are not communicated with the central hole 1 b. A portion of the drilling fluid from the upper drill string enters the central bore 1b to form a second fluid stream; another portion of the drilling fluid enters the plurality of cutwater holes 1a to form a first stream. The central hole 1b or the peripheral wall thereof extends towards the right end and is in threaded connection with the left end of the downhole power device 3, so that the second liquid flow enters the power generation part of the downhole power device 3 to provide a power source. A plurality of water distribution holes 1a are associated with the annulus between the outer cylinder 2 and the downhole power unit 3 so that a first flow of fluid can enter the annulus and ultimately the large cutting head 5 to cool and lubricate the large cutting head 5. Here, the number of the plurality of water distribution holes 1a may be 2 to 6, and the water distribution holes 1a may be circular or elliptical water distribution holes. The ratio of the sum of the radial cross-sectional areas of the plurality of water distribution holes 1a to the radial cross-sectional area of the central hole 1b, that is, the ratio of the flow rates of the first liquid flow and the second liquid flow, may be 1: 0.5 to 2, for example 1: 1, etc. The drilling fluid from the upper drill string has a preset pressure, and the flow rates of the first fluid flow and the second fluid flow can be controlled by controlling the ratio of the radial sectional area of the water distribution holes 1a to the radial sectional area of the central hole 1b, so that the purpose of shunting is achieved. However, the present invention is not limited thereto, and the diversion device may have other structures as long as the diversion of the drilling fluid in the upper drill string can be achieved.
In the present exemplary embodiment, the downhole power unit has a power generation portion and a rotation output portion. The power generation unit is configured to generate power by the second fluid flow and rotate the rotation output unit. The rotation output portion is configured to be coupled to the small cutting head through the through hole of the large cutting head and to be capable of driving the small cutting head to rotate. For example, the power generating part of the downhole power device 3 may be a hydraulic drive motor or a hydraulic drive turbine, the second hydraulic flow drives the power generating part to rotate, the power generating part drives the rotation output part to rotate, and the rotation output part drives the small cutting head 6 connected with the rotation output part to rotate through the through hole of the large cutting head 5. Or the left end extension part of the small cutting head 6 passes through the through hole of the large cutting head 5 to be connected with the rotation output part, so that the rotation is driven by the rotation output part. However, the present invention is not limited thereto, and the downhole power device may have other structures as long as the downhole power device can generate power and drive the small cutting head to rotate under the action of the second fluid flow.
In the exemplary embodiment, the righting device can be provided with a plum blossom-like cavity, the plum blossom-like cavity can right a power generation part or a rotary output part of a downhole power device, or can right a part to be righted such as a part where a small cutting head is connected with the rotary output part, the part to be righted shakes in an outer cylinder, friction is reduced, and the stability and the service life of the double-speed double-center drilling speed-increasing equipment are improved.
FIG. 6 illustrates a schematic structural view of a centralizer assembly according to an exemplary embodiment of a method of manufacture of a two-speed dual-core drilling acceleration apparatus according to the present invention; FIG. 7 shows a right side view of FIG. 6; FIG. 8 shows a pictorial representation of FIG. 6.
As shown in fig. 6 to 8, the right end of the centering device 4 may be a cavity shaped like a plum blossom. The radial section of the plum blossom-shaped cavity is plum blossom-shaped. The plum blossom-like cavity can be arranged on the inner wall of the right end part of the righting device 4 and is surrounded by a plurality of inner bosses 4a along the circumferential direction. Of course, the cavity similar to the quincunx shape may be arranged in central symmetry along the central axis of the centering device 4, or in non-central symmetry along the central axis of the centering device 4, and is determined according to the specific situation of the part to be centered. For example, when the righted component is arranged in a non-centrosymmetric manner, the plum blossom-like cavity is also arranged in a non-centrosymmetric manner; when the righted part is arranged in a central symmetry manner, the plum blossom-like cavities are also arranged in a central symmetry manner. Here, the top surfaces of the inner bosses 4a are curved to fit the outer surface of the member to be centered, and the curved shape of the top surfaces of the plurality of inner bosses 4a is located on an imaginary circumference having a diameter slightly larger than the diameter of the member to be centered. Concave surfaces 4b are formed between two adjacent inner bosses 4a, and the number of concave surfaces 4b is equal to the number of inner bosses 4 a. Here, the concave surface may be a circular arc shape, a U shape, or a V shape. While the centering device 4 centers the centered member, the second fluid flow entering the annulus may enter the large cutting head 5 through the passage between the outer surface of the centered member and the quincunx-like cavity to cool and lubricate the large cutting head 5. The concave surface is provided here in order to increase the cross-sectional area of the passage through which the drilling fluid flows. However, the present invention is not limited in this regard and the centralizer may have other configurations as long as it is capable of centralizing the component being centralized and allowing the flow of drilling fluid (e.g., the first fluid stream) therethrough.
In the exemplary embodiment, the small cutting head and the large cutting head are arranged in a non-centrosymmetric manner, and the diameter of the small cutting head is smaller than that of the large cutting head, so that the small cutting head can revolve around the central axis of the large cutting head under the drive of an upper drill string while rotating at a high speed under the drive of a downhole power device, thereby forming composite rotary drilling and solving the problem of low drilling speed caused by the linear velocity of the central point of the drill bit during drilling. For example, the central axis of the large cutting head 5 is a first centre line. The large cutting head 5 is provided with a through going hole along a first centre line. The penetration is used for coupling the rotary output portion of the downhole power unit 3 through with the small cutting head 6, or for coupling the left end portion of the small cutting head 6 through with the rotary output portion. The diameter of the large cutting head 5 is a first diameter, which may be the diameter of the outer periphery of the cutting cones on the large cutting head 5. The centre axis of the small cutting head 6 is the second centre line and the diameter of the small cutting head 6 is the second diameter. When the second diameter is smaller than the first diameter and the first centerline is parallel to but not coincident with the second centerline, the small cutting head 6 and the large cutting head 5 are disposed non-centrosymmetrically.
Here, the distance between the first centerline and the second centerline may be 1/50 ~ 1/10 of the first diameter, such as 1/30 first diameter, 1/20 first diameter, and the like. When the distance between the first central line and the second central line is smaller than 1/50 the first diameter, the linear cutting speed of the central point of the drill bit is improved to some extent; when the distance between the first center line and the second center line is controlled to be 1/50-1/10 first diameter, the cutting speed of a center point line of the drill bit can be well improved, and the drilling speed can be well improved; when the distance between the first centre line and the second centre line is larger than 1/10 the first diameter, the chance of wear of the small cutting head 6 is increased, which may reduce the tool life to some extent.
The small cutting head 6 rotates at a high speed under the drive of the downhole power device 3 and revolves around the first central line to do compound motion under the drive of the upper drill string. As shown in fig. 2, the small cutting head 6 extends beyond the large cutting head 5 by a distance (denoted L) so that the small cutting head 6 can first contact the bottom of the well to drill a small borehole in the bottom of the well, forming a hollow rock mass; the large cutting head 5 then drills the hollow rock mass away to form the final desired borehole. Here, 0 < L < 0.6m, and further 0.2 < L < 0.5 m. When L is more than 0.2 and less than 0.5m, better drilling speed improvement and tool service life can be obtained; when L is greater than 0.6m, a large load is applied to the downhole power unit 3, which may reduce the service life to some extent.
When drilling operation is carried out, the small cutting head 6 rotates at a high speed under the drive of the underground power device 3, and simultaneously revolves around the first central line under the drive of the upper drill column to do composite motion, and meanwhile, the large cutting head 5 rotates under the drive of the upper drill column. Here, the rotation speed of the large cutting head 5 can be controlled within a range of 60 to 80 revolutions per minute. The rotation speed range of the small cutting head 6 can be controlled to be 200-600 revolutions/min, and the revolution speed range of the small cutting head 6 can be controlled to be 60-80 revolutions/min. The angular velocity of rotation of the large cutting head 5 is R, the sum of the angular velocities of rotation and revolution of the small cutting head 6 is R, and the ratio R: R of the angular velocity R of the small cutting head 6 to the angular velocity R of the large cutting head 5 may be 2 to 9:1, more preferably 4 to 7: 1. when the ratio of R to R is controlled to be 2-9: 1, the drilling speed-up effect is better; when R is less than 2, the drilling speed is improved to a certain extent; when the R is more than 9, the power requirement of the downhole power device is higher, the abrasion probability of the small cutting head is increased, and the service life is reduced to a certain extent.
In the exemplary embodiment, the small cutting head is further provided with a jet channel which can gradually reduce the cross-sectional area of the flow passage, and the second fluid flow enters the small cutting head after driving the rotary output part to rotate and is jetted to the bottom of the well through the jet channel to perform high-pressure jet drilling. For example, the small cutting head 6 is provided with a plurality of jet channels along the second center line, and the cross-sectional area of the jet channels in the radial direction is gradually reduced. The second fluid drives the power generating part to rotate and then enters the cutting head 6 via the rotation output part, e.g. its central through hole. The second flow may enter from the larger cross-section end of the spray channel of the cutting bit 6, where the pressure gradually increases, eventually forming a high-pressure spray from the smaller cross-section end of the spray channel. The high-pressure jet drilling fluid can scour the well bottom at a high flow rate, help the drill bit to break rocks and improve the rock breaking efficiency of the drill bit, and can better clean the well bottom and a small cutting head to prevent cutting tooth mud bags and accelerate drilling. Here, the large cutting head and the small cutting head may be ordinary bits, and high-performance PDC bits may also be used. For example, a physical schematic diagram of the present exemplary embodiment may be as shown in fig. 9.
In summary, the method of manufacturing the two-speed dual-core drilling acceleration device of the present invention has one or more of the following advantages:
1. the double-speed double-core drilling speed-increasing equipment can be manufactured;
2. the double-speed double-center drilling speed-increasing equipment can avoid the condition that the linear speed of the central point of a large drill bit is zero during drilling, and is favorable for increasing the drilling speed;
3. the double-speed double-core drilling speed-up equipment has good stability and long service life;
4. the double-speed double-center drilling speed-increasing equipment can drive the small cutting head to rotate by the shunted drilling fluid;
5. through forming corresponding spare part earlier, the equipment forms double-speed two heart well drilling speed-raising equipment again, can adopt modes such as connection such as screw thread or joint between each spare part, equipment convenient and fast, the spare part change in later stage is convenient.
Although the present invention has been described above in connection with the exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.
Claims (6)
1. A manufacturing method of a double-speed double-center drilling speed-increasing device is characterized by comprising the following steps:
forming a flow dividing device, an outer cylinder, a downhole power device, a righting device, a large cutting head and a small cutting head;
the flow dividing device, the outer cylinder body, the underground power device, the righting device, the large cutting head and the small cutting head are assembled to form the double-speed double-center drilling speed-increasing equipment, wherein,
the large cutting head having a first centerline, a through bore disposed along the first centerline, and a first diameter, the small cutting head having a second centerline and a second diameter, the second diameter being smaller than the first diameter, the second centerline being parallel to but not coincident with the first centerline;
the outer cylinder is sleeved outside the underground power device to form an annular space, the left end of the outer cylinder is connected with the upper drill string through the flow dividing device, and the right end of the outer cylinder is connected with the large cutting head through the righting device, so that the large cutting head can drill under the driving of the upper drill string, and the underground power device rotates under the driving of the upper drill string;
the downhole power device is provided with a power generation part and a rotation output part, wherein the power generation part can generate power and rotate the rotation output part, and the rotation output part passes through the through hole of the large cutting head and is connected with the small cutting head and can drive the small cutting head to rotate;
the righting device is configured to right the power generation portion, the rotary output portion, or the small cutting head;
the flow divider is configured to separate drilling fluid in the upper drill string into a first flow that enters the annulus and lubricates the large cutting head and a second flow that enters the power generation portion of the downhole power plant.
2. The method of manufacturing a two speed dual center drilling acceleration apparatus of claim 1, wherein the distance between the first centerline and the second centerline is 1/50-1/10 of the first diameter.
3. The method of manufacturing a two-speed dual-core drilling acceleration apparatus as claimed in claim 1, wherein the ratio of the angular velocity of the small cutting head to the angular velocity of the large cutting head is 4 to 7: 1.
4. the method of claim 1 wherein the cutting head has a jet channel with a gradually decreasing radial cross-sectional area, and wherein one end of the jet channel receives the second fluid stream flowing through the motive force generating portion and is ejected from the other end of the jet channel.
5. The method of manufacturing a two-speed dual-core drilling acceleration device according to claim 1, characterized in that the righting means has a quincunx-like cavity capable of righting the power generation section or the rotary output section, or of righting the portion of the small cutting head coupled to the rotary output section.
6. The method of manufacturing a two speed dual center drilling acceleration apparatus of claim 1, wherein the diversion device has a diversion member, wherein the diversion member has a central bore and a plurality of diversion holes, wherein the plurality of diversion holes are capable of communicating drilling fluid in an upper drill string with the annulus and forming the first flow, and wherein the central bore is capable of communicating drilling fluid in an upper drill string with the power generation section and forming the second flow.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409751.8A CN111058761A (en) | 2019-12-31 | 2019-12-31 | Manufacturing method of double-speed double-center drilling speed-increasing equipment |
| US17/132,397 US11225837B2 (en) | 2019-12-31 | 2020-12-23 | Dual-speed dual—core enhanced drilling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409751.8A CN111058761A (en) | 2019-12-31 | 2019-12-31 | Manufacturing method of double-speed double-center drilling speed-increasing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111058761A true CN111058761A (en) | 2020-04-24 |
Family
ID=70305529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911409751.8A Pending CN111058761A (en) | 2019-12-31 | 2019-12-31 | Manufacturing method of double-speed double-center drilling speed-increasing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111058761A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6422328B1 (en) * | 1999-10-27 | 2002-07-23 | Baker Hughes Incorporated | Dual cutting mill |
| CN102561951A (en) * | 2012-01-14 | 2012-07-11 | 中国石油天然气集团公司 | Double-stage and double-speed well drilling tool |
| CN106930686A (en) * | 2015-12-29 | 2017-07-07 | 中石化石油工程技术服务有限公司 | Eccentric double rank broken rock devices |
| CN107386960A (en) * | 2017-08-04 | 2017-11-24 | 四川深远石油钻井工具股份有限公司 | A kind of drilling speed device with composite drill bit |
| CN110029934A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | Double speed PDC drill bit based on screw drive |
| CN110374512A (en) * | 2019-06-17 | 2019-10-25 | 河北锐石钻头制造有限公司 | A kind of concentric type twin-stage double speed PDC drill bit |
-
2019
- 2019-12-31 CN CN201911409751.8A patent/CN111058761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6422328B1 (en) * | 1999-10-27 | 2002-07-23 | Baker Hughes Incorporated | Dual cutting mill |
| CN102561951A (en) * | 2012-01-14 | 2012-07-11 | 中国石油天然气集团公司 | Double-stage and double-speed well drilling tool |
| CN106930686A (en) * | 2015-12-29 | 2017-07-07 | 中石化石油工程技术服务有限公司 | Eccentric double rank broken rock devices |
| CN107386960A (en) * | 2017-08-04 | 2017-11-24 | 四川深远石油钻井工具股份有限公司 | A kind of drilling speed device with composite drill bit |
| CN110029934A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | Double speed PDC drill bit based on screw drive |
| CN110374512A (en) * | 2019-06-17 | 2019-10-25 | 河北锐石钻头制造有限公司 | A kind of concentric type twin-stage double speed PDC drill bit |
Non-Patent Citations (1)
| Title |
|---|
| 靖向党: "《高等专科学校数学用书 钻孔工程》", 28 February 1999, 冶金工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016150113A1 (en) | Positive displacement motor drill and rock breaking well drilling method therefor | |
| CN103291213B (en) | Water pressure torsional impact device for well drilling | |
| CN106837178B (en) | A kind of efficient three-dimensional impact drilling speed device | |
| CN105888553A (en) | Three-dimensional vibration hydraulic oscillator | |
| CN205422538U (en) | Three -dimensional vibration hydroscillator | |
| CN205840769U (en) | A kind of underground hydraulic rotary impact device | |
| CN208534402U (en) | A kind of hydroscillator | |
| CN108360974A (en) | Composite impact tool | |
| CN206129207U (en) | Novel oscillatory surge ware based on turbine and cam | |
| CN102966305A (en) | Near-bit circumferential resonance impacter | |
| CN110905395B (en) | Drilling acceleration system capable of changing well bottom confining pressure distribution through energy accumulation in middle | |
| CN107217982A (en) | Underground coal mine drilling multistage deslagging air screw motor | |
| CN108049803B (en) | Impeller type differential torque impact device | |
| CN106837181A (en) | A kind of drilling well knob drill hammer | |
| CN211692324U (en) | Double-speed double-core drilling speed-increasing equipment | |
| CN106121540B (en) | Shaft bottom drilling liquid pressure concussion modulator | |
| CN114961568A (en) | Multidirectional oscillation impact screw drill | |
| CN206636507U (en) | A kind of drilling well knob drill hammer | |
| CN211692295U (en) | Well drilling speed-increasing system capable of changing bottom hole confining pressure distribution by middle energy gathering | |
| CN203271584U (en) | Well-drilling water-pressure torsional impact device | |
| CN210460489U (en) | Torsional impact device for well drilling | |
| CN210977336U (en) | Torsional impact oscillation screw | |
| CN210127820U (en) | A torsion percussion device for deep oil gas development | |
| CN110984845A (en) | Well drilling speed increasing method for changing bottom hole confining pressure distribution by middle energy accumulation | |
| CN117027660A (en) | Impact-cutting composite drill bit with planetary wheel balancing torque |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200424 |
|
| RJ01 | Rejection of invention patent application after publication |