CN114837557B - Mechanical hydraulic jet guiding vertical drilling system - Google Patents
Mechanical hydraulic jet guiding vertical drilling system Download PDFInfo
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- CN114837557B CN114837557B CN202210549387.0A CN202210549387A CN114837557B CN 114837557 B CN114837557 B CN 114837557B CN 202210549387 A CN202210549387 A CN 202210549387A CN 114837557 B CN114837557 B CN 114837557B
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- 238000005553 drilling Methods 0.000 title claims abstract description 138
- 239000012530 fluid Substances 0.000 claims abstract description 93
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 230000005484 gravity Effects 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B7/04—Directional drilling
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- 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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B7/04—Directional drilling
- E21B7/10—Correction of deflected boreholes
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- 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 discloses a mechanical hydraulic jet steering vertical drilling system, which belongs to the technical field of geological drilling and comprises a drill bit, a mechanical flow guide unit and a second drilling fluid flow channel, wherein the second drilling fluid flow channel is arranged between the drill bit and the mechanical flow guide unit; the drill bit is provided with a plurality of nozzles which are arranged at intervals around the axis of the drill bit, and a third drilling fluid flow passage for communicating the nozzles with the second drilling fluid flow passage is also arranged in the drill bit; the mechanical diversion unit comprises a cylindrical shell, and a first drilling fluid flow channel, a first liquid outlet and a weight rotating part which are arranged in the shell; the weight rotating part can freely rotate around the axis of the shell and drive the first liquid outlet to synchronously rotate; when the casing slope, the partial weight rotating part can control under the effect of gravity the instrument face angle of first liquid outlet is unchangeable all the time. The invention has the advantages of small volume and high reliability.
Description
Technical Field
The invention relates to the technical field of geological drilling, in particular to a mechanical hydraulic jet steering vertical drilling system.
Background
The well deviation problem caused by geological factors, drilling tool factors, process factors and the like can cause a series of adverse effects on exploration and development, well drilling and completion, oil extraction and the like, and even cause irreparable economic loss. Therefore, high precision well deviation control is always one of the technical difficulties in drilling engineering.
The mainstream vertical drilling systems used at present, such as power V, a product of schrenbach corporation, and a Verti Track system of beckhause corporation, all use an electronic control module to control a mechanical device represented by a pushing block to push against the well wall for controlling the drilling direction. However, the deep environment is complicated and severe, the depth of geological drilling is three degrees per hundred meters, and all electronic components used by the electronic control module are easy to lose effectiveness and have low reliability.
In contrast, mechanical vertical drilling systems have the advantages of long service life, high reliability, low cost, and the like, and are currently used in the field of geological drilling. The Chinese patent with the application number of CN202011454301.3 discloses a mechanical automatic vertical drilling tool, an eccentric switch of the tool can control drilling fluid to flow to different cavities under the action of gravity, so that different push blocks are controlled to be pushed out, the push blocks push against a well wall to realize inclination correction, and the drilling tool can keep a vertical drilling direction. The provision of additional lateral pushers increases the volume of the downhole drilling tool.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a mechanical hydraulic jet steering vertical drilling system which has the advantages of small volume and high reliability.
In order to achieve the above object, the present invention provides a mechanical hydraulic jet steering vertical drilling system, comprising a drill bit, a mechanical diversion unit and a second drilling fluid flow channel, wherein the second drilling fluid flow channel is arranged between the drill bit and the mechanical diversion unit;
the drill bit is provided with a plurality of nozzles which are arranged at intervals around the axis of the drill bit, and a third drilling fluid flow passage for communicating the nozzles with the second drilling fluid flow passage is also arranged in the drill bit;
the mechanical diversion unit comprises a cylindrical shell, and a first drilling fluid flow channel, a first liquid outlet and a heavy rotating part which are arranged in the shell, wherein the first liquid outlet is positioned at the bottom of the first drilling fluid flow channel and communicated with the second drilling fluid flow channel, and guides the drilling fluid in the first drilling fluid flow channel to flow to a nozzle on the lower side of the drill bit; the weight rotating part can freely rotate around the axis of the shell and drive the first liquid outlet to synchronously rotate; when the casing slope, the weight of partially rotating part can control under the effect of gravity the instrument face angle of first liquid outlet is unchangeable all the time.
In one embodiment of the present invention, the eccentric rotation portion includes a mandrel and a plurality of plugging columns freely rotating around the mandrel; the spindle is disposed inside the housing and coaxially disposed with the housing; the outer edge cylindrical surface of the mandrel and the inner side wall of the shell are in spaced surrounding to form the first drilling fluid flow passage;
the plurality of cylindrical plugging columns are arranged in the first drilling fluid flow channel around the circumference of the central axis of the shell, and the first drilling fluid flow channel is incompletely filled with the plugging columns.
In an embodiment of the present invention, when the housing is tilted, the blocking columns roll to a mutually abutting state, and the first liquid outlet is formed at intervals between the head and the tail of the blocking column; when the shell is vertical, the blocking columns are uniformly arranged at intervals.
In an embodiment of the invention, the second drilling fluid flow passage has a first liquid inlet for communicating with the first liquid outlet and a second liquid outlet for communicating with the third drilling fluid flow passage; first inlet the second liquid outlet with the axis of casing is located the coplanar, just first inlet with the second liquid outlet is located respectively the both sides of the axis of casing.
In an embodiment of the present invention, a plurality of first centering grooves are arranged on an outer edge cylindrical surface of the mandrel at intervals along an extending direction of the mandrel, and groove walls of the first centering grooves are perpendicular to the extending direction of the mandrel; a second righting groove corresponding to the first righting groove is formed in the inner side wall of the shell; the plug is provided with a righting ring, and the righting ring can be embedded into the first righting groove and the second righting groove.
In one embodiment of the invention, the bottom of the plugging column is higher than the bottom of the housing.
In an embodiment of the present invention, the drill further comprises a connector for connecting the casing and the drill bit, wherein the connector is coaxially arranged with the casing; the plurality of second drilling fluid flow channels are arranged inside the connector, and the second drilling fluid flow channels extend from the top of the connector to the bottom of the connector in a spiral mode; the second drilling fluid flow channel surrounds the even circumference interval arrangement of axis of connector.
In one embodiment of the present invention, the weight rotating portion includes a spindle and a weight freely rotatable about the spindle; the spindle is disposed inside the housing and coaxially disposed with the housing; the offset weight is arranged between the mandrel and the shell, and a disc valve is fixed at the bottom of the offset weight; the first liquid outlet is a disc valve port provided on the disc valve.
Compared with the prior art, the mechanical hydraulic jet steering vertical drilling system can guide all or relatively more drilling fluid to the nozzle on the lower side of the drill bit through the second drilling fluid flow channel all the time, so that the drilling speed of the inclined drill bit on the lower side of the inclined drill bit is higher, the inclined drilling system is continuously corrected, and the drilling system can drill along the vertical direction all the time. The scheme does not use additional mechanical power devices such as a pushing block and the like arranged on the outer surface of the drill bit or the drill rod or the drill collar, and has the advantages of small volume and compact structure compared with the prior art. The guide of drilling fluid is all accomplished by mechanical mechanism, compares electronic control device, and this scheme has the advantage that the reliability is high in the pit of the complicated condition.
Drawings
FIG. 1 is a schematic diagram of the overall configuration of a mechanical hydrajet steerable vertical drilling system of the present invention;
FIG. 2 is a schematic illustrating the flow path of drilling fluid when a mechanical hydrajet guided vertical drilling system of the present invention is tilted;
FIG. 3 is a schematic view of a first arrangement of one embodiment of a deflector section of a mechanical hydrajet guided vertical drilling system of the present invention;
FIG. 4 is a schematic view of a second arrangement of the eccentric rotating portion of FIG. 3;
FIG. 5 is an assembly view of a mechanical deflector unit of a mechanical hydrajet guided vertical drilling system of the present invention;
FIG. 6 is a schematic diagram of another embodiment of a partially-weighted rotating portion of a mechanical hydrajet steerable vertical drilling system according to the present invention.
Description of the main reference numerals:
1. a drill bit; 2. a mechanical flow guide unit; 201. a housing; 202. a first drilling fluid flow passage; 203. a first liquid outlet; 204. a mandrel; 205. plugging the column; 206. a first righting groove; 207. a second righting groove; 208. a righting ring; 209. a deflection block; 210. a disc valve; 3. a connector; 301. a second drilling fluid flow passage; 302. a first liquid inlet; 303. a second liquid outlet.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
In the art, the bottom of the well is a circular plane in an inclined state, which is called the bottom circle. The highest point on the bottom circle is called the high side and the lowest point is called the low side. The toolface angle refers to the direction that a directional well job site personnel uses to determine the whipstock.
As shown in fig. 1 to 6, a mechanical hydrajet guided vertical drilling system according to a preferred embodiment of the present invention includes a drill bit 1, a mechanical guide unit 2, and a second drilling fluid flow passage 301. A second drilling fluid flow channel 301 is arranged between the drill bit 1 and the mechanical flow guiding unit 2 for guiding drilling fluid from the mechanical flow guiding unit 2 into the drill bit 1. The arrows in fig. 2 show the direction of flow of the drilling fluid.
A plurality of nozzles are arranged in the drill bit 1, the nozzles are arranged around the axis of the drill bit 1 at intervals, and a third drilling fluid flow channel used for communicating the nozzles with the second drilling fluid flow channel 301 is further arranged in the drill bit 1.
The mechanical diversion unit 2 includes a cylindrical housing 201, and a first drilling fluid flow passage 202, a first fluid outlet 203 and a heavy rotating part which are disposed inside the housing 201. A first liquid outlet 203 is provided at the end of the first drilling fluid flow passage 202.
The second drilling fluid flow passage 301 includes a first inlet port 302 and a second outlet port 303. The first liquid inlet 302 and the second liquid outlet 303 are respectively located at two ends of the second drilling fluid flow passage 301, the first liquid inlet 302 is used for being communicated with the first liquid outlet 203 and receiving the drilling fluid flowing out of the first liquid outlet 203, and the second liquid outlet 303 is used for being communicated with the third drilling fluid flow passage. The first inlet port 302 and the second outlet port 303 are located on the same plane as the central axis of the housing 201, and the first inlet port 302 and the second outlet port 303 are respectively located on two sides of the central axis of the housing 201.
The housing 201 is used to transmit a rotational speed to the drill bit 1, which is kept rotating during operation. The first liquid outlet 203 is communicated with the second drilling fluid flow passage 301, and the first liquid outlet 203 guides the drilling fluid in the first drilling fluid flow passage 202 to flow to the nozzle on the lower side of the drill bit 1, thereby promoting the inclined drilling system to return to the vertical drilling state. The eccentric weight rotating part can freely rotate around the axis of the shell 201 and drive the first liquid outlet 203 to synchronously rotate, namely, the eccentric weight rotating part can not rotate along with the rotation of the shell 201. When the housing 201 is inclined, the tool face angle of the first liquid outlet 203 can be controlled by the gravity rotating portion to be constant all the time under the action of gravity.
This system still includes connector 3 that is used for connecting mechanical water conservancy diversion unit 2 and drill bit 1, and connector 3 and casing 201 coaxial setting, and it has a plurality of second drilling fluid runners 301 to open in the body of connector 3, and each second drilling fluid runner 301 begins the spiral from the top of connector 3 and extends to the bottom of connector 3, and each second drilling fluid runner 301 is around the even circumference interval arrangement of the axis of connector 3. The connector 3 can transmit the rotary power of the casing 201 to the drill bit 1, and meanwhile, the spiral second drilling fluid flow channel 301 arranged inside the connector 3 can guide the drilling fluid flowing out from the first liquid outlet 203 on the high side to the low side. When the drilling machine works, the connector 3 continuously rotates, the first liquid outlet 203 keeps stable relative to the ground layer, and the plurality of second drilling fluid flow channels 301 continuously rotate to relay and transmit drilling fluid, so that the drilling fluid always flows out of the second liquid outlet 303 positioned on the lower side. Preferably, the nozzles provided on the drill bit 1 should also be uniformly arranged to correspond to the uniformly arranged second drilling fluid flow passages 301.
The mechanical diversion unit 2 can always guide all or relatively more drilling fluid to the nozzle at the lower side of the drill bit 1 through the second drilling fluid flow passage 301, so that the drilling speed of the inclined drill bit 1 at the lower side of the inclined drill bit is higher, the inclined drilling system is continuously corrected, and the drilling system can drill along the vertical direction all the time.
As shown in fig. 3, in some embodiments, the eccentrically rotating portion may be a combination of a mandrel 204 and a plug that freely rotates about the mandrel 204. A mandrel 204 is arranged in the shell 201, the mandrel 204 is arranged coaxially with the shell 201, and the outer edge cylindrical surface of the mandrel 204 and the inner side wall of the shell 201 are enclosed at intervals to form a first drilling fluid flow passage 202. A plurality of cylindrical plugging columns 205 are arranged in the first drilling fluid flow channel 202 around the circumference of the central axis of the shell 201, the outer edge cylindrical surface of each plugging column 205 is tangent to the outer edge cylindrical surface of the mandrel 204, the outer edge cylindrical surface of each plugging column 205 is tangent to the inner side wall of the shell 201, and each plugging column 205 is incompletely filled in the first drilling fluid flow channel 202. When the housing 201 is tilted, the blocking columns 205 roll to a state of abutting against each other, and the first liquid outlet ports 203 are formed at intervals by the head and the tail blocking columns 205.
The above structure shows a specific embodiment of the mechanical flow guiding unit 2, and in this embodiment, the aforementioned eccentric rotating parts are a plurality of plugging columns 205 arranged inside the housing 201 in a rolling manner and a mandrel 204 for supporting the plugging columns 205. The upper and lower end faces of the plug 205 and the mandrel 204 should be closed, and the drilling fluid can only pass through a gap enclosed by the inner wall of the shell 201, the cylindrical surface of the outer edge of the plug 205 and the cylindrical surface of the outer edge of the mandrel 204. The number of the plugging columns 205 is a plurality, the plugging columns 205 are annularly arranged in an annular space between the mandrel 204 and the shell 201 by taking the mandrel 204 as an axis, and the plugging columns 205 are tangent to and connected with the inner wall of the shell 201 in a rolling way, so that the plugging columns 205 cannot rotate along with the shell 201. Because the number of the plugging columns 205 is not enough to completely fill the annular space, i.e., the first drilling fluid flow passage 202, when the drilling fluid works, the plugging columns 205 are combined in at least two arrangement modes:
when the housing 201 is inclined, the plugging columns 205 are in a first arrangement mode as shown in fig. 3, the plugging columns 205 roll to the lower side of the housing 201 under the action of gravity to be in a state of being close to each other, the head and tail plugging columns 205 at two ends of the edge are spaced and exposed to form a flow channel area with a larger cross section, and a first liquid outlet 203 is formed at the bottom of the flow channel area. Most of the drilling fluid is guided to the flow passage area on the high side and leaves the housing 201 from the first liquid outlet 203, and enters the second drilling fluid flow passage 301 through the first liquid inlet 302, because the first liquid inlet 302, the second liquid outlet 303 and the central axis of the housing 201 are located on the same plane, and the first liquid inlet 302 and the second liquid outlet 303 are respectively located at two sides of the central axis of the housing 201, after the drilling fluid on the high side enters the second drilling fluid flow passage 301, the drilling fluid will flow out from the second liquid outlet 303 on the low side and enter the drill bit 1, and then the drill bit 1 is driven to preferentially drill towards the low side, so that the deviation correction is realized. Meanwhile, the blocking columns 205 are arranged at the outer edge of the mandrel 204, the arrangement mode can maximize the moment of the blocking columns 205 relative to the central axis 204 of the mandrel 204, and when the shell 201 inclines, the blocking columns 205 can roll to the lower edge of the shell 201 more sensitively.
When the housing 201 is vertical, the plugging columns 205 are in the second arrangement as shown in fig. 4, the plugging columns 205 will be uniformly spaced, and at this time, there will be no flow channel region with a larger cross section in the first drilling fluid flow channel 202, and the drilling fluid will uniformly flow out of the housing 201. The drilling fluid uniformly flows out from each nozzle of the drill bit 1, and the whole system keeps a vertical drilling posture. In the prior art, a mechanical vertical drilling system usually adopts a deflection weight and a disk valve with an opening to guide drilling fluid, and then controls pushing blocks at different positions to push out a supporting well wall by using the flow difference of the drilling fluid so as to correct the deviation. Because the size of the opening on the disc valve can not be changed, the drilling fluid can be uniformly distributed in the opening of the disc valve all the time, and when the system vertically drills, the pushing block is pushed out, and the system can be inclined. In this embodiment, the second arrangement of the plugging columns 205 overcomes this drawback.
As shown in fig. 5, which is a partial cross-sectional view of the mechanical flow guiding unit 2, a plurality of first centering grooves 206 are arranged on an outer cylindrical surface of the mandrel 204 at intervals along an extending direction of the mandrel 204, groove walls of the first centering grooves 206 are perpendicular to the extending direction of the mandrel 204, and a central axis of the first centering grooves 206 coincides with a central axis of the mandrel 204; the inside wall of casing 201 is opened there is the second that corresponds with first righting groove 206 and is right groove 207, is provided with on the jam post 205 and right ring 208, and right ring 208 can imbed first righting groove 206 and second and right groove 207. The first and second centralizing grooves 206 and 207 jointly capture the centralizing ring 208 so that the plug 205 remains parallel to the axis of the mandrel 204 at all times, preventing the plug 205 from tilting and jamming when rolling in the annulus. In addition, the provision of the righting slots also enables the axial relative position coordinates between the positioning mandrel 204, the plugging post 205 and the casing 201 to be limited.
The bottom of the plugging column 205 may be set higher than the bottom of the housing 201 to avoid contact friction between the bottom surface of the plugging column 205 and other components.
As shown in fig. 6, the eccentrically rotating portion may be a combination of a spindle 204 and an eccentric weight that freely rotates about the spindle 204, which may be an alternative to the embodiments shown in fig. 3-5. In this embodiment, the interior of the housing 201 is provided with a spindle 204, a bias weight 209 disposed between the spindle 204 and the housing 201, and a disc valve 210 secured to the bottom of the bias weight 209, the spindle 204 being disposed coaxially with the housing 201. The first outlet port 203 may be a disc valve port provided on the disc valve 210 that rotates synchronously with the bias weight at the bottom of the housing 201, and all or most of the drilling fluid in the housing flows out only from the disc valve port. Because under the effect of gravity, the weight partially can turn to the low side all the time, and the dish valve port is first liquid outlet 203 and turns to certain position of predetermineeing all the time under the drive of weight partially, and the instrument face angle that the first liquid outlet 203 can be controlled to the weight partially rotating part is unchangeable all the time under the effect of gravity promptly.
In the invention, the injection direction of the drilling fluid is controlled by adopting pure machinery, the drilling fluid is unevenly injected to ensure that the drilling speeds of different sides of the inclined drill bit are different, and the drill bit is further corrected
In the technical scheme of the invention, extra mechanical power devices such as the pushing block and the like arranged on the outer surface of the drill bit 1 or the drill rod or the drill collar are not used, and compared with the prior art, the mechanical power device has the advantages of small volume and compact structure. The guide of drilling fluid is all accomplished by mechanical mechanism, compares electronic control device, and this scheme has the advantage that the reliability is high in the pit of the complicated condition.
The foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. A mechanical hydraulic jet steering vertical drilling system is characterized by comprising a drill bit, a mechanical diversion unit and a second drilling fluid flow passage, wherein the second drilling fluid flow passage is arranged between the drill bit and the mechanical diversion unit;
the drill bit is provided with a plurality of nozzles which are arranged at intervals around the axis of the drill bit, and a third drilling fluid flow passage for communicating the nozzles with the second drilling fluid flow passage is also arranged in the drill bit;
the mechanical diversion unit comprises a cylindrical shell, and a first drilling fluid flow channel, a first liquid outlet and a heavy rotating part which are arranged in the shell, wherein the first liquid outlet is positioned at the bottom of the first drilling fluid flow channel and communicated with the second drilling fluid flow channel, and guides the drilling fluid in the first drilling fluid flow channel to flow to a nozzle on the lower side of the drill bit; the weight rotating part can freely rotate around the axis of the shell and drive the first liquid outlet to synchronously rotate; when the casing slope, the weight of partially rotating part can control under the effect of gravity the instrument face angle of first liquid outlet is unchangeable all the time.
2. The mechanical hydrajet guided vertical drilling system of claim 1, wherein the eccentrically rotating section comprises a mandrel and a plurality of plugs freely rotatable about the mandrel; the spindle is disposed inside the housing and coaxially disposed with the housing; the outer edge cylindrical surface of the mandrel and the inner side wall of the shell are in spaced enclosure to form the first drilling fluid flow channel;
the plurality of cylindrical plugging columns are arranged in the first drilling fluid flow channel around the circumference of the central axis of the shell, and the first drilling fluid flow channel is incompletely filled with the plugging columns.
3. The system of claim 2, wherein when said housing is tilted, said plugs roll into close proximity to one another, with said plugs spaced end-to-end to define said first exit port; when the shell is vertical, the blocking columns are uniformly arranged at intervals.
4. The mechanical hydrajet guided vertical drilling system of claim 2, wherein the second drilling fluid flow passage has a first inlet port for communicating with the first outlet port and a second outlet port for communicating with the third drilling fluid flow passage; first inlet the second liquid outlet with the axis of casing is parallel, and first inlet with the plane perpendicular to at second liquid outlet place the axis of casing, just first inlet with the second liquid outlet is located respectively the both sides of the axis of casing.
5. The mechanical hydraulic jet steering vertical drilling system as claimed in claim 2, wherein a plurality of first centralizing grooves are arranged on the outer cylindrical surface of the mandrel at intervals along the extension direction of the mandrel, and the groove walls of the first centralizing grooves are perpendicular to the extension direction of the mandrel; a second righting groove corresponding to the first righting groove is formed in the inner side wall of the shell; the plug is provided with a righting ring, and the righting ring can be embedded into the first righting groove and the second righting groove.
6. The mechanical hydrajet guided vertical drilling system of claim 2, wherein a bottom of the plug is higher than a bottom of the housing.
7. The mechanical hydrajet guided vertical drilling system of claim 2, further comprising a connector for connecting the housing and the drill bit, the connector being disposed coaxially with the housing; the second drilling fluid flow channels are arranged inside the connector and extend from the top of the connector to the bottom of the connector in a spiral mode; the second drilling fluid flow channel surrounds the even circumference interval arrangement of axis of connector.
8. The mechanical hydrajet guided vertical drilling system of claim 1, wherein the offset rotary portion comprises a mandrel and an offset weight freely rotatable about the mandrel; the spindle is disposed inside the housing and coaxially with the housing; the offset weight is arranged between the mandrel and the shell, and a disc valve is fixed at the bottom of the offset weight; the first liquid outlet is a disc valve port provided on the disc valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549387.0A CN114837557B (en) | 2022-05-20 | 2022-05-20 | Mechanical hydraulic jet guiding vertical drilling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549387.0A CN114837557B (en) | 2022-05-20 | 2022-05-20 | Mechanical hydraulic jet guiding vertical drilling system |
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| Publication Number | Publication Date |
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| CN114837557A CN114837557A (en) | 2022-08-02 |
| CN114837557B true CN114837557B (en) | 2023-04-07 |
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| CN202210549387.0A Active CN114837557B (en) | 2022-05-20 | 2022-05-20 | Mechanical hydraulic jet guiding vertical drilling system |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2784570Y (en) * | 2005-04-14 | 2006-05-31 | 中国石化集团胜利石油管理局钻井工艺研究院 | Mechanical automatic vertical drilling tool |
| CN101451425A (en) * | 2007-12-07 | 2009-06-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Shunt type automatic vertical well drilling tool suitable for gas drilling |
| CN202280424U (en) * | 2011-11-04 | 2012-06-20 | 中国石油天然气集团公司 | Upper suspended-type automatic deflection-control drilling tool |
| CN202788616U (en) * | 2012-09-12 | 2013-03-13 | 董志辉 | Automatic vertical drilling tool |
| CN106437517B (en) * | 2016-11-30 | 2020-10-09 | 中石化石油工程技术服务有限公司 | Low-edge constant jet anti-inclination drilling tool |
| CN111894456A (en) * | 2019-12-04 | 2020-11-06 | 中国地质大学（北京） | Mechanical quasi-static pushing vertical drilling tool for coring |
| CN112610158B (en) * | 2020-12-14 | 2022-09-13 | 中国石油大学(华东) | Intelligent vertical drilling system and drilling method |
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