CN112412379B - Rotary milling guide shoe for petroleum drilling and rotary milling method thereof - Google Patents
Rotary milling guide shoe for petroleum drilling and rotary milling method thereof Download PDFInfo
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- CN112412379B CN112412379B CN202011526111.8A CN202011526111A CN112412379B CN 112412379 B CN112412379 B CN 112412379B CN 202011526111 A CN202011526111 A CN 202011526111A CN 112412379 B CN112412379 B CN 112412379B
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- pawl
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- guide shoe
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- 238000005553 drilling Methods 0.000 title claims abstract description 65
- 238000003801 milling Methods 0.000 title claims abstract description 49
- 239000003208 petroleum Substances 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims description 20
- 239000008187 granular material Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 238000009991 scouring Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 7
- 239000004576 sand Substances 0.000 description 6
- 239000012634 fragment Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- 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
- E21B17/14—Casing shoes for the protection of the bottom of the casing
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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 relates to a rotary milling guide shoe for petroleum drilling and a rotary milling method thereof, wherein the rotary milling guide shoe comprises a shell, one end part of the shell is a pawl, the outer wall of the pawl is sleeved with a rotary body capable of rotating automatically, the end part of the rotary body, far away from the pawl, is in rotary connection with an eccentric guide head, and the eccentric guide head is provided with an eccentric nozzle; wherein a one-way valve and a guide wheel are fixed in the hollow cavity of the shell, one end of the guide wheel is right opposite to the outlet of the one-way valve, the other end of the guide wheel is abutted against the free end of the pawl, and the free end of the pawl is embedded into the inner wall of the rotating body. The rotary milling guide shoe is applied to casing running operation of a highly deviated well and a long horizontal well, drilling fluid deflects after scouring a guide wheel, the deflected drilling fluid strikes a moving blade, the moving blade drives a rotating body to rotate actively, the drilling fluid is swept out from an eccentric nozzle to clean a detritus bed, the active rotation of the rotating body can reduce the running friction of a casing, the problem that the running friction of the casing is influenced due to the fact that the bottom of the casing meets a deflecting point or the detritus bed to cause blocking in the running process is avoided, and the casing running operation is smoother.
Description
Technical Field
The invention belongs to the field of drilling, and particularly relates to a rotary milling guide shoe for petroleum drilling and a rotary milling method thereof.
Background
In the field of petroleum drilling, in the drilling process of a large-displacement well and a horizontal well, various connected complications are caused by frequent descending of a long horizontal section casing, even well collapse or sand bridges accumulated at the bottom of the well occur, in the operation of well completion casing descending, friction resistance is increased due to the well collapse or the sand bridges accumulated at the bottom of the well, the descending of the casing is hindered, and particularly, the conventional suspended casing descending needs to bear higher hydrostatic column pressure difference, so that the reverse stabbing failure of the casing is easily caused.
In order to avoid the problems, a casing guide shoe is installed at the top end of a casing to assist in running, the casing guide shoe is a conical or bullet-shaped short section connected to the bottom of the casing, the casing is guided to run to the designed depth of a well, the situations that the casing is blocked and is placed in a blocked mode due to the fact that sediment and rocks on a well wall are scraped at the bottom of the casing are avoided, and the head of the existing guide shoe used at home and abroad is fixed or not in an active rotating mode, and the situation that a rock debris bed cannot be damaged when a sand bridge is used for casing operation in a horizontal section, so that the casing is placed in a blocked mode is avoided.
Disclosure of Invention
The invention aims to provide a rotary milling guide shoe for petroleum drilling and a rotary milling method thereof, which are used for overcoming the technical defects.
In order to solve the technical problem, the invention provides a rotary milling guide shoe for petroleum drilling, which comprises a hollow tubular shell, wherein one end part of the shell is used for rotatably connecting a sleeve, the other end part of the shell is provided with an elastic pawl, the outer wall of the pawl is sleeved with a rotatable rotating body, the end part of the rotating body, which is far away from the pawl, is rotatably connected with an eccentric guide head, and the eccentric guide head is provided with an eccentric nozzle;
wherein a one-way valve and a guide wheel are fixed in the hollow cavity of the shell, one end of the guide wheel is right opposite to the outlet of the one-way valve, the other end of the guide wheel is abutted against the free end of the pawl, and the free end of the pawl is embedded into the inner wall of the rotating body.
Furthermore, the rotating body is of a hollow columnar structure, the inner wall of the rotating body is provided with an annular groove for containing the free end of the pawl, a plurality of moving blades which rotate automatically under the action of the liquid medium are fixedly connected in the hollow cavity, the roots of the moving blades are fixedly connected to the central shaft, and the end parts, opposite to the roots, of the moving blades are fixedly connected to the inner wall of the rotating body.
Preferably, the end of the casing is circumferentially divided into a plurality of spring pieces, the ring-shaped member formed by the spring pieces surrounding at even intervals is a pawl, one end of the pawl far away from the casing is a free end, the outer surface of the free end of each spring piece protrudes outwards to form a semi-spherical surface, the semi-spherical surface is embedded in the annular groove, and when the liquid medium erodes the moving blades, the annular groove of the rotating body is driven to rotate along the semi-spherical surface.
Furthermore, the end of the free end of each elastic sheet extends in the direction away from the semi-circular spherical surface to form an arc-shaped sheet-shaped barb, all the barbs surround into a circle at uniform intervals, and the end of the guide wheel abuts against the barb.
Furthermore, the root of each elastic sheet is opposite to the free end of each elastic sheet, the roots of two adjacent elastic sheets are provided with arc-shaped holes, the adjacent arc-shaped holes are spliced into round holes, and the round holes are communicated with the gaps between the adjacent elastic sheets;
wherein, the shell and the pawl are integrally formed.
Preferably, the guide wheel is of a hollow columnar structure, a hollow shaft is arranged in a hollow cavity of the guide wheel, the axial center line of the hollow shaft is superposed with the axial center line of the guide wheel, a hollow channel of the hollow shaft is penetrated by a valve rod of the one-way valve, N stationary blades are uniformly arranged in an annular space between the hollow shaft and the guide wheel at intervals, the annular space is divided into N overflowing channels which are not communicated by the N stationary blades, and the plane of each stationary blade is inclined to the radial plane;
wherein the rotating direction of the rotor blade is opposite to that of the stator blade.
Furthermore, the guide wheel is provided with two opposite ports, one port is used as a liquid medium inlet and directly faces the one-way valve, the other port is used as a liquid medium outlet and directly faces the moving blade, the section of the liquid medium outlet end is in a concave-convex alternating shape, and the protruding part abuts against the arc-shaped sheet barb.
Preferably, the outer surface of the eccentric guide head is provided with a strip-shaped protrusion made of cemented carbide particles.
Preferably, the moving blade is coupled to the inner wall of the rotating body by a bolt, and the guide wheel is coupled to the housing by a bolt.
The invention also protects a rotary milling method, which at least comprises a rotary milling guide shoe for petroleum drilling, and the specific rotary milling method comprises the following steps:
installing a rotary milling guide shoe at the most front section of the casing string, and putting the rotary milling guide shoe into a target well along with the casing;
when the horizontal section descending to the target well meets resistance, the wellhead is connected with a circulating grouting device;
starting a pump for circulation;
drilling fluid gets into the check valve, and the check valve is opened, and in the hollow passage of the hollow shaft that stretches into the leading wheel was retreated to the valve rod of check valve, the drilling fluid takes place to deflect behind the stator blade of flowing through, and the moving blade is hit perpendicularly to the drilling fluid of deflection, and the moving blade drives the rotator and rotates around the pawl, and the sand bridge is drawn to carbide granule when rotatory, destroys the detritus bed, and the drilling fluid sweeps out from eccentric spout, supplementary clearance detritus bed.
The invention has the following beneficial effects:
the rotary milling guide shoe is applied to casing running operation of a highly deviated well and a long horizontal well, drilling fluid enters a guide wheel through a one-way valve, the drilling fluid deflects after washing a stationary blade, the deflected drilling fluid hits a moving blade, the moving blade drives a rotating body to rotate together, the drilling fluid is swept out from an eccentric nozzle, and a detritus bed is cleaned. The active rotation of the rotary milling guide shoe can reduce the running friction resistance of the sleeve, and avoid the problem that the bottom of the sleeve is blocked when meeting a deflecting point or a rock debris bed in the running process to influence the running of the sleeve, so that the running operation of the sleeve is smoother, the construction efficiency is improved, and the time is saved.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a cross-sectional view of a rotary milling guide shoe for oil drilling.
Fig. 2 is a schematic structural view of the housing.
Fig. 3 is a schematic view of the assembly of the rotating body and the eccentric guide head.
Fig. 4 is a schematic structural view of the guide wheel.
Fig. 5 is a radial view of the guide wheel.
FIG. 6 is a front view of the rotor blade.
FIG. 7 is a side view of the rotor blade.
Description of reference numerals:
1. a housing; 101. a pawl; 102. a semi-spherical surface; 103. a barb;
2. a rotating body; 201. an annular groove; 202. moving blades; 203. a central shaft;
3. an eccentric seeker; 301. an eccentric spout; 302. strip-shaped bulges;
4. a guide wheel; 401. a stationary blade; 402. a hollow shaft;
5. a one-way valve.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the present invention, the upper, lower, left, and right in the drawings are referred to as the upper, lower, left, and right of the rotary milling guide shoe for oil drilling described in the present specification.
Example embodiments of the present invention will now be described with reference to the accompanying drawings, however, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are provided for a complete and complete disclosure of the invention and to fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the present invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
First embodiment
The embodiment relates to a rotary milling guide shoe for petroleum drilling, which comprises a hollow tubular shell 1, wherein one end part of the shell 1 is used for rotatably connecting a casing, as shown in fig. 2, the other end part of the shell 1 is provided with an elastic pawl 101, the outer wall of the pawl 101 is sleeved with a rotatable rotating body 2, as shown in fig. 1, the end part, far away from the pawl 101, of the rotating body 2 is rotatably connected with an eccentric guide head 3, and the eccentric guide head 3 is provided with an eccentric nozzle 301;
according to fig. 1, a one-way valve 5 and a guide wheel 4 are fixed in a hollow cavity of a shell 1, one end of the guide wheel 4 is opposite to an outlet of the one-way valve 5, the other end of the guide wheel 4 is abutted against a free end of a pawl 101, and the free end of the pawl 101 is embedded in the inner wall of a rotating body 2.
The working principle of the rotary milling guide shoe for petroleum drilling is as follows:
the drilling fluid enters the one-way valve 5, the one-way valve 5 is opened, the drilling fluid enters the guide wheel 4, the drilling fluid deflects after flowing through the guide wheel 4, the deflected drilling fluid vertically strikes the rotating body 2, the rotating body 2 rotates around the pawl 101, the drilling fluid is swept out from the eccentric nozzle 301, and a rock debris bed is cleaned.
The installation mode of the rotary milling guide shoe for petroleum drilling is as follows:
the eccentric guide head 3 and the rotator 2 are fixedly connected through threads, the push pawl 101 enters the rotator 2, the pawl 101 has elasticity, the free end of the pawl 101 is recovered when meeting an opening of the rotator 2 under the elastic pressure and slowly enters an inner cavity of the rotator 2 until the free end of the pawl 101 is embedded into the inner wall of the rotator 2, the tightened pawl 101 recovers to the original shape, whether the rotator 2 can freely rotate around the pawl 101 of the shell 1 is checked, if the rotator can freely rotate, the next step of installation is continued, the guide wheel 4 is pushed into the inner cavity of the shell 1, the guide wheel 4 is abutted to the free end of the pawl 101, the pawl 101 is prevented from rotating through radial fixation, finally, the check valve 5 is installed, the check valve 5 is screwed on the inner wall of the shell 1 through threads, and meanwhile, the guide wheel 4 is fixed in the axial direction.
The existing rotary milling guide shoes are non-rotatable or non-power-driven rotating guide shoes, a detritus bed cannot be damaged when a sand bridge is encountered, the rotating body 2 in the embodiment can actively rotate under the scouring of drilling fluid to damage the detritus bed, friction reduction and resistance reduction are realized, and a sleeve can be conveniently and smoothly put into the guide shoes.
For ease of installation, the outer diameter of the pawl 101 coincides with the inner diameter of the opening of the rotating body 2.
The outer diameter of the guide wheel 4 is consistent with the inner diameter of the pawls 101, and the function of the guide wheel is to radially fix the pawls 101 and prevent the pawls 101 from contracting to cause the falling of the rotating body 2.
The function of the check valve 5 is to open the rotary body 2 from the housing 1 only, but not to reverse.
The guide wheel 4 is used for causing the drilling fluid to deflect and vertically hit the blades of the inner cavity of the rotating body 2, so that the rotating body 2 is actively rotated.
The eccentric nozzle 301 can realize eccentric rotary injection, and the sweep range is enlarged.
Second embodiment
The embodiment relates to a rotary milling guide shoe for petroleum drilling, which comprises a hollow tubular shell 1, wherein one end part of the shell 1 is used for rotatably connecting a casing, as shown in fig. 2, the other end part of the shell 1 is provided with an elastic pawl 101, the outer wall of the pawl 101 is sleeved with a rotatable rotating body 2, as shown in fig. 1, the end part, far away from the pawl 101, of the rotating body 2 is rotatably connected with an eccentric guide head 3, and the eccentric guide head 3 is provided with an eccentric nozzle 301;
according to fig. 1, a one-way valve 5 and a guide wheel 4 are fixed in a hollow cavity of a shell 1, one end of the guide wheel 4 is opposite to an outlet of the one-way valve 5, the other end of the guide wheel is abutted against a free end of a pawl 101, and the free end of the pawl 101 is embedded in the inner wall of a rotating body 2.
Referring to fig. 3, the rotating body 2 is a hollow column structure, and an annular groove 201 for accommodating a free end of the pawl 101 is formed in an inner wall thereof, as shown in fig. 6 and 7, a plurality of moving blades 202 that rotate by being washed by a liquid medium are further fixedly connected in the hollow cavity, roots of the plurality of moving blades 202 are fixedly connected to a central shaft 203, and end portions opposite to the roots are fixedly connected to the inner wall of the rotating body 2.
When the pawls 101 are pushed to enter the rotating body 2, under elastic pressure, the free ends of the pawls 101 are embedded into the annular groove 201 of the rotating body 2, the open ends of the rotating body 2 are slowly recovered until the free ends of the pawls 101 are completely embedded into the annular groove 201, the tightened pawls 101 recover the original shape, drilling fluid flowing through the guide wheel 4 is deflected, the deflected drilling fluid vertically hits the moving blades 202, and the moving blades 202 drive the rotating body 2 to rotate around the pawls 101.
The arrangement of the moving blades 202 is preferably as shown in fig. 6 and 7, the shape of the moving blades 202 is similar to that of an airfoil, and as can be seen from fig. 7, the airfoil area of the moving blades 202 is changed, so the pressure of the blades is also different, so the blades generate lift force to assist rotation, and reference can be made to the principle of airfoil lift force.
It should be noted that fig. 6 and 7 are the best choice but not the only choice for the present embodiment, and the structure thereof may be changed according to actual needs, so that the final purpose can be achieved that the drilling fluid passing through the guide wheel 4 vertically hits on the moving blade 202, and the moving blade 202 drives the rotating body 2 to actively rotate.
It is worth mentioning that all the moving blades 202 are located below the annular groove 201.
In order to ensure that the rotor blades 202 actively rotate the rotor 2, all the rotor blades 202 rotate in the same direction, clockwise or counterclockwise.
Referring to fig. 2, the end of the casing 1 is divided into a plurality of elastic pieces along the circumference, the annular member formed by the elastic pieces surrounding at regular intervals is the pawl 101, one end of the pawl 101 away from the casing 1 is a free end, the outer surface of the free end of each elastic piece protrudes outwards to form a semi-spherical surface 102, the semi-spherical surface 102 is embedded in the annular groove 201, and when the liquid medium washes the moving blades 202, the annular groove 201 of the rotating body 2 is driven to rotate along the semi-spherical surface 102.
In the present embodiment, the end portion where the half spherical surface 102 is located is defined as a free end because the free end is not connected to another member, but the half spherical surface 102 at the free end may be fitted into the annular groove 201 so that the annular groove 201 of the rotating body 2 rotates along the half spherical surface 102, and the end portion of the guide wheel 4 is abutted against the free end of the ratchet 101 in order to ensure that the free end does not rotate in the radial direction.
As shown in fig. 2, the end of the free end of each elastic sheet extends in a direction away from the semi-spherical surface 102 to form an arc-shaped sheet-shaped barb 103, all the barbs 103 surround a circle at uniform intervals, and the end of the guide wheel 4 abuts against the barb 103, specifically, referring to fig. 1 and 4:
the guide wheel 4 has two opposite ports, one of which is used as a liquid medium inlet and faces the one-way valve 5, the other is used as a liquid medium outlet and faces the moving blade 202, the cross section of the liquid medium outlet is in a concave-convex alternating shape, and the convex part abuts against the arc-shaped sheet-shaped barb 103.
When drilling fluid flows through the guide wheel 4, the guide wheel 4 is in a locked state because the protrusion at the end of the guide wheel 4 abuts against the barb 103 of the pawl 101, the flow of the fluid is deflected, and the deflected fluid continues to flow downward past the moving blades 202.
The protrusion at the end of the guide wheel 4 cooperates with the barb 103 of the pawl 101 to achieve radial fixation and avoid rotation.
As shown in fig. 2, what is relative with the free end of every shell fragment is the root of shell fragment, the arc hole is all seted up to the root of two adjacent shell fragments, adjacent arc hole is to piecing together into the round hole, the round hole communicates the clearance between adjacent shell fragment, the purpose of this design is the shrink and the recovery that realize pawl 101 to make casing 1 and rotator 2 rely on protrusion (the half spherical surface 102 of pawl 101) and sunken (annular groove 201) to mutually support and produce axial fixity, and can be similar to the ball principle free rotation of bearing.
Wherein, casing 1 and pawl 101 are integrated into one piece, but pawl 101 has elasticity through the post processing.
Referring to fig. 4 and 5, the guide wheel 4 is a hollow cylindrical structure, a hollow shaft 402 is arranged in a hollow cavity of the guide wheel, an axial center line of the hollow shaft 402 is overlapped with an axial center line of the guide wheel 4, a hollow channel of the hollow shaft 402 is used for a valve rod of the check valve 5 to pass through, N stationary blades 401 are uniformly arranged in an annular space between the hollow shaft 402 and the guide wheel 4 at intervals, the annular space is divided into N flow-passing channels which are not communicated with each other by the N stationary blades 401, a plane where each stationary blade 401 is located is inclined to a radial plane, wherein N is a positive integer.
The drilling fluid enters the one-way valve 5, the one-way valve 5 is opened, a valve rod of the one-way valve 5 retreats and extends into a hollow channel of a hollow shaft 402 of the guide wheel 4, the drilling fluid is divided by the N overflowing channels and then deflects after flowing through the static blades 401, the deflected drilling fluid vertically hits the moving blades 202, and the moving blades 202 drive the rotating body 2 to rotate around the pawl 101.
The stationary blades 401 are arranged obliquely with the purpose of deflecting the drilling fluid.
All the stationary blades 401 have the same rotation direction, clockwise or counterclockwise.
The rotating direction of the moving blades 202 is opposite to that of the stationary blades 401, for example, if all the stationary blades 401 are clockwise rotating direction, then all the moving blades 202 are counterclockwise rotating direction, so that the deflected drilling fluid can vertically impact on the moving blades 202.
Referring to fig. 3, the outer surface of the eccentric guide head 3 is provided with a strip-shaped protrusion 302 made of hard alloy particles, and the eccentric guide head 3 can break the rock debris bed while rotating and has abrasion resistance.
The rotor blade 202 is bolted to the inner wall of the rotor 2, and the guide wheel 4 is bolted to the casing 1.
The housing 1 may be connected to the sleeve by means of a screw thread.
The rotating body 2 (including the moving blades 202) and the eccentric guide head 3 are used as a rigid body and rotate together, the eccentric nozzle 301 can eccentrically rotate to spray, and the scanning range is enlarged.
The one-way valve 5, the guide wheel 4, the moving blade 202 and the eccentric guide head 3 are all made of copper or aluminum or nonmetal composite materials, so that the one-way valve 5, the guide wheel 4, the moving blade 202 and the eccentric guide head 3 can be drilled through by a drill bit for drilling when the casing is lowered to be in fault, the one drill bit is lowered from a wellhead casing, the one-way valve 5, the guide wheel 4, the moving blade 202 and the eccentric guide head 3 can be drilled through the whole casing string, and further drilling construction can be carried out.
Third embodiment
The embodiment provides a rotary milling method, which at least comprises a rotary milling guide shoe for petroleum drilling, and the specific rotary milling method comprises the following steps:
installing a rotary milling guide shoe at the most front section of the casing string, and putting the rotary milling guide shoe into a target well along with the casing;
when the horizontal section descending to the target well meets resistance, the wellhead is connected with a circulating grouting device;
starting a pump for circulation;
the drilling fluid enters the one-way valve 5, the one-way valve 5 is opened, a valve rod of the one-way valve 5 retreats and extends into a hollow channel of a hollow shaft 402 of the guide wheel 4, the drilling fluid deflects after flowing through the stationary blade 401, the deflected drilling fluid vertically strikes the moving blade 202, the moving blade 202 drives the rotating body 2 to rotate around the pawl 101, the hard alloy particles scratch a sand bridge while rotating, a rock debris bed is damaged, the drilling fluid is swept out of the eccentric nozzle 301, and the rock debris bed is cleaned in an auxiliary mode.
The rotary milling guide shoe for petroleum drilling comprises a hollow tubular shell 1, one end of the shell 1 is used for rotatably connecting a casing, and the rotary milling guide shoe is characterized in that the other end of the shell 1 is an elastic pawl 101, a rotatable rotating body 2 is sleeved on the outer wall of the pawl 101, the end, far away from the pawl 101, of the rotating body 2 is rotatably connected with an eccentric guide head 3, and the eccentric guide head 3 is provided with an eccentric nozzle 301.
Wherein, a one-way valve 5 and a guide wheel 4 are fixed in the hollow cavity of the shell 1, one end of the guide wheel 4 is right opposite to the outlet of the one-way valve 5, the other end is abutted against the free end of the pawl 101, and the free end of the pawl 101 is embedded into the inner wall of the rotating body 2.
The rotating body 2 is a hollow columnar structure, an annular groove 201 for accommodating the free end of the pawl 101 is formed in the inner wall of the rotating body, a plurality of moving blades 202 which rotate automatically under the action of the liquid medium are fixedly connected in the hollow cavity, the roots of the moving blades 202 are fixedly connected to the central shaft 203, and the end parts opposite to the roots are fixedly connected to the inner wall of the rotating body 2.
The end of the casing 1 is split into a plurality of spring pieces along the circumference, the annular part formed by the spring pieces surrounding at even intervals is the pawl 101, one end of the pawl 101 far away from the casing 1 is a free end, the outer surface of the free end of each spring piece protrudes outwards to form a semi-spherical surface 102, the semi-spherical surface 102 is embedded in the annular groove 201, and when the liquid medium erodes the moving blades 202, the annular groove 201 of the rotating body 2 is driven to rotate along the semi-spherical surface 102.
The free end of each elastic sheet extends along the direction away from the semi-spherical surface 102 to form an arc-shaped sheet-shaped barb 103, all the barbs 103 surround into a circle at uniform intervals, and the end of the guide wheel 4 abuts against the barbs 103.
The root of the elastic sheet is opposite to the free end of each elastic sheet, the root of each two adjacent elastic sheets is provided with an arc hole, the adjacent arc holes are spliced into round holes, and the round holes are communicated with the gaps between the adjacent elastic sheets.
Wherein the housing 1 and the pawl 101 are integrally formed.
The guide wheel 4 is a hollow columnar structure, a hollow shaft 402 is arranged in a hollow cavity of the guide wheel, the axial center line of the hollow shaft 402 is superposed with the axial center line of the guide wheel 4, a hollow channel of the hollow shaft 402 is used for a valve rod of the one-way valve 5 to pass through, N stationary blades 401 are uniformly arranged in an annular space between the hollow shaft 402 and the guide wheel 4 at intervals, the annular space is divided into N overflowing channels which are not communicated with each other by the N stationary blades 401, and the plane where each stationary blade 401 is located is inclined to a radial plane;
wherein the rotational direction of the rotor blade 202 is opposite to that of the stator blade 401.
The guide wheel 4 has two opposite ports, one of which is used as a liquid medium inlet and faces the one-way valve 5, the other is used as a liquid medium outlet and faces the moving blade 202, the cross section of the liquid medium outlet is in a concave-convex alternating shape, and the convex part abuts against the arc-shaped sheet-shaped barb 103.
The outer surface of the eccentric seeker 3 is provided with a strip-shaped protrusion 302 made of hard alloy particles.
The rotor blade 202 is bolted to the inner wall of the rotor 2, and the guide wheel 4 is bolted to the casing 1.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. The rotary milling guide shoe for petroleum drilling comprises a hollow tubular shell (1), one end of the shell (1) is used for rotatably connecting a casing, and the rotary milling guide shoe is characterized in that the other end of the shell (1) is provided with an elastic pawl (101), the outer wall of the pawl (101) is sleeved with a rotary body (2) capable of rotating automatically, the end, far away from the pawl (101), of the rotary body (2) is rotatably connected with an eccentric guide head (3), and the eccentric guide head (3) is provided with an eccentric nozzle (301);
wherein a one-way valve (5) and a guide wheel (4) are fixed in a hollow cavity of the shell (1), one end of the guide wheel (4) is right opposite to an outlet of the one-way valve (5), the other end of the guide wheel is abutted against the free end of the pawl (101), and the free end of the pawl (101) is embedded into the inner wall of the rotating body (2);
the rotating body (2) is a hollow columnar structure, and a plurality of moving blades (202) which rotate by self under the washing of a liquid medium are fixedly connected in the hollow cavity;
the guide wheel (4) is of a hollow cylindrical structure, a hollow shaft (402) is arranged in a hollow cavity of the guide wheel, a hollow channel of the hollow shaft (402) is used for a valve rod of the one-way valve (5) to penetrate through, N stationary blades (401) are uniformly arranged in an annular space between the hollow shaft (402) and the guide wheel (4) at intervals, and the rotating direction of the moving blades (202) is opposite to that of the stationary blades (401).
2. The rotary milling guide for oil drilling according to claim 1, characterized in that the inner wall of the rotary body (2) is provided with an annular groove (201) for receiving the free end of the pawl (101), the roots of a plurality of the moving blades (202) are fixed to the central shaft (203), and the end opposite to the roots are fixed to the inner wall of the rotary body (2).
3. The rotary milling guide shoe for petroleum drilling according to claim 2, characterized in that the end of the housing (1) is divided into a plurality of spring plates along the circumference, the annular member formed by the plurality of spring plates being uniformly spaced and surrounded is a pawl (101), the end of the pawl (101) away from the housing (1) is a free end, the outer surface of the free end of each spring plate protrudes outwards to form a semi-spherical surface (102), the semi-spherical surface (102) is embedded in the annular groove (201), and when the liquid medium washes the moving blades (202), the annular groove (201) of the rotating body (2) is driven to rotate along the semi-spherical surface (102).
4. The rotary milling guide shoe for petroleum drilling as recited in claim 3, characterized in that the free end of each spring plate extends in a direction away from the semi-spherical surface (102) to form an arc-shaped sheet-shaped barb (103), all the barbs (103) are uniformly spaced and surround a circle, and the end of the guide wheel (4) abuts against the barb (103).
5. The rotary milling guide shoe for petroleum drilling as recited in claim 3, wherein the free end of each spring plate is opposite to the root of the spring plate, the root of each two adjacent spring plates are provided with arc-shaped holes, the adjacent arc-shaped holes are spliced into round holes, and the round holes are communicated with the gaps between the adjacent spring plates;
wherein, the shell (1) and the pawl (101) are integrally formed.
6. The rotary milling guide shoe for petroleum drilling according to claim 4, characterized in that the axial centerline of the hollow shaft (402) coincides with the axial centerline of the guide wheel (4), the N stationary blades (401) divide the annular space into N flow-through channels that are not communicated with each other, and the plane of each stationary blade (401) is inclined to the radial plane.
7. The rotary milling guide shoe for oil drilling according to claim 6, characterized in that the guide wheel (4) has two opposite ports, one of which faces the check valve (5) as a liquid medium inlet and the other of which faces the rotor blade (202) as a liquid medium outlet, the liquid medium outlet end has an alternating cross-section with a convex portion abutting against the curved plate-shaped barb (103).
8. The rotary milling guide shoe for oil drilling according to claim 1, characterized in that the outer surface of the eccentric guide head (3) is provided with strip-like protrusions (302) made of cemented carbide granules.
9. The rotary milling guide shoe for oil drilling according to claim 2, characterized in that the rotor blade (202) is bolted to the inner wall of the rotor (2) and the guide wheel (4) is bolted to the housing (1).
10. A rotary milling method, characterized in that at least the rotary milling guide shoe for oil drilling according to any claim 1-9 is included, and the specific rotary milling method is as follows:
installing a rotary milling guide shoe at the most front section of a casing string, and putting the rotary milling guide shoe into a target well along with a casing;
when the horizontal section descending to the target well meets resistance, the wellhead is connected with a circulating grouting device;
opening a pump for circulation;
the drilling fluid gets into check valve (5), check valve (5) are opened, the valve rod of check valve (5) is retreated and is stretched into in the hollow channel of hollow shaft (402) of leading wheel (4), the drilling fluid takes place to deflect behind stator blade (401) of flowing through, the drilling fluid of deflection strikes moving blade (202) perpendicularly, moving blade (202) drive rotator (2) are rotatory around pawl (101), the sediment bridge is drawn to carbide granule during rotatory, destroys the detritus bed, the drilling fluid is swept out from eccentric spout (301), supplementary clearance detritus bed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011526111.8A CN112412379B (en) | 2020-12-22 | 2020-12-22 | Rotary milling guide shoe for petroleum drilling and rotary milling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011526111.8A CN112412379B (en) | 2020-12-22 | 2020-12-22 | Rotary milling guide shoe for petroleum drilling and rotary milling method thereof |
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| CN112412379A CN112412379A (en) | 2021-02-26 |
| CN112412379B true CN112412379B (en) | 2023-02-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2185718A1 (en) * | 1996-04-08 | 1997-10-09 | Steven S. Lambe | Multi-purpose drilling tool |
| CN201567991U (en) * | 2009-11-25 | 2010-09-01 | 中国石油天然气股份有限公司 | Hexagon spiral pilot milling tap |
| CN210622732U (en) * | 2019-09-06 | 2020-05-26 | 中石化石油工程技术服务有限公司 | Guide shoe device for running casing |
| CN210918920U (en) * | 2019-11-20 | 2020-07-03 | 建宇(上海)石油科技有限公司 | Self-rotating dynamic stabilization short joint |
| CN111535756A (en) * | 2020-04-28 | 2020-08-14 | 中国石油集团渤海钻探工程有限公司 | Self-centering rotary guide device |
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2020
- 2020-12-22 CN CN202011526111.8A patent/CN112412379B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2185718A1 (en) * | 1996-04-08 | 1997-10-09 | Steven S. Lambe | Multi-purpose drilling tool |
| CN201567991U (en) * | 2009-11-25 | 2010-09-01 | 中国石油天然气股份有限公司 | Hexagon spiral pilot milling tap |
| CN210622732U (en) * | 2019-09-06 | 2020-05-26 | 中石化石油工程技术服务有限公司 | Guide shoe device for running casing |
| CN210918920U (en) * | 2019-11-20 | 2020-07-03 | 建宇(上海)石油科技有限公司 | Self-rotating dynamic stabilization short joint |
| CN111535756A (en) * | 2020-04-28 | 2020-08-14 | 中国石油集团渤海钻探工程有限公司 | Self-centering rotary guide device |
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| 大位移水平井旋转自导式套管浮鞋的研制与应用;李社坤 等;《石油钻采工艺》;20170531;第39卷(第3期);第323-327页 * |
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| CN112412379A (en) | 2021-02-26 |
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