CN210598887U - Mill and expand integrative awl of milling - Google Patents
Mill and expand integrative awl of milling Download PDFInfo
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- CN210598887U CN210598887U CN201921748494.6U CN201921748494U CN210598887U CN 210598887 U CN210598887 U CN 210598887U CN 201921748494 U CN201921748494 U CN 201921748494U CN 210598887 U CN210598887 U CN 210598887U
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Abstract
A milling and expanding integrated milling cone. Relates to the technical field of petroleum machinery. An inner screw thread is arranged in an inner hole in the upper part of the upper joint, a milling column is connected in a threaded hole in the lower part of the upper joint in a threaded manner, the milling column is connected with a cylinder in threaded connection with the upper joint through a bearing, and the lower end of the milling column is in threaded connection with a guide rod. The utility model discloses following beneficial effect has: the utility model discloses a set up the guide rod and will mill the awl guide and get into sleeve pipe defect position, the rotatory mill post that mills grinds the expansion section of milling operation and irrotational roller to the sleeve pipe and extrude the reaming to the sleeve pipe, and the casing pipe deformation stress is eliminated to the gage section, and the positive hole ware is further restoreed the sleeve pipe, improves when having reduced the operation moment of torsion of drilling rod and mills grinding efficiency to reduce the risk of casing wall attenuation, improved sheathed tube rate of utilization.
Description
The technical field is as follows:
the utility model belongs to the technical field of the petroleum machinery and specifically relates to a mill and expand integrative awl of milling.
Background art:
in the development process of an oil field, due to the influence of various factors, the underground casing is often subjected to diameter reduction and bending deformation, and sometimes even cracks and breaks, so a milling cone is often used in well repair, the milling operation is carried out on a deformation section by using the milling cone, the milling cone used in the current milling operation adopts a hard alloy blade as a main means for pipe expansion, although the purpose of expanding the diameter of the casing can be achieved, the hard alloy blade inevitably generates a cutting action on the casing, and the milling operation also generates the risk of thinning the thickness of the casing wall.
The utility model has the following contents:
in order to solve the problem, the utility model provides a mill and expand integrative awl of milling.
The technical scheme of the utility model is that: a milling and expanding integrated milling cone comprises an upper joint, wherein an inner screw thread is arranged in an inner hole in the upper part of the upper joint, a milling and grinding column is connected with a threaded hole in the lower part of the upper joint in a threaded manner, the milling and grinding column is connected with a cylinder in threaded connection with the upper joint through a bearing, and the lower end of the milling and grinding column is in threaded connection with a guide rod;
the outer circle of the roller is divided into a cylindrical gauge section and a conical expansion section, the top of the gauge section is a hole corrector, the lower part of the milling and grinding column is of a conical structure, and the conical angle of the cone at the lower part of the milling and grinding column is the same as the conical angle of the conical expansion section of the roller;
the lower part of the milling and grinding column is of a conical structure, and the outer conical surface of the milling and grinding column is provided with a plurality of spiral guide and cutting grooves;
the lower part of the milling and grinding column is of a conical structure, and a tungsten carbide coating is sintered on the outer conical surface of the milling and grinding column;
the upper joint and the milling and grinding column are provided with inner holes in the center, the center of the milling and grinding column is provided with a counter bore which is not communicated with the bottom, and the outer surface of the cone at the lower part of the milling and grinding column is provided with a plurality of through holes communicated with the counter bore in the center.
The guide rod is divided into a cylindrical section at the upper part and a conical section at the lower part, and the bottom of the conical section is hemispherical.
The conical section of the guide rod is provided with a planar nib which is obliquely cut along the hemispherical center at the bottom of the conical section.
The roller is made of high-carbon high-speed steel.
The hole rectifier is formed by sintering a tungsten carbide coating on the top excircle of the diameter-keeping section.
The utility model discloses following beneficial effect has: the utility model discloses a set up the guide rod and will mill the awl guide and get into sleeve pipe defect position, the rotatory mill post that mills grinds the expansion section of milling operation and irrotational roller to the sleeve pipe and extrude the reaming to the sleeve pipe, and the casing pipe deformation stress is eliminated to the gage section, and the positive hole ware is further restoreed the sleeve pipe, improves when having reduced the operation moment of torsion of drilling rod and mills grinding efficiency to reduce the risk of casing wall attenuation, improved sheathed tube rate of utilization.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view a-a of fig. 1.
FIG. 1-top connection; 2-a bearing; 3-maintaining the diameter section; 4-a roller; 5-an expansion section; 6, milling and grinding the column; 7-tungsten carbide coating; 8-a guide rod; 9-a through hole; 10-a pilot cutting groove; 11-a cylindrical section; 12-a conical section; 13-a pen tip; 14-counter bore; 15-positive hole device.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, the milling and expanding integrated milling cone comprises an upper joint 1, an inner screw thread is arranged in an inner hole at the upper part of the upper joint 1, a milling and grinding column 6 is connected with an inner thread in a threaded hole at the lower part of the upper joint 1, the milling and grinding column 6 and a cylinder in threaded connection with the upper joint 1 are connected with a roller 4 through a bearing 2, and the lower end of the milling and grinding column 6 is in threaded connection with a guide rod 8;
the outer circle of the roller is divided into a cylindrical gauge section 3 and a conical expansion section 5, the top of the gauge section is a hole corrector 15, the lower part of a milling and grinding column 6 is of a conical structure, the conical angle of the cone at the lower part of the milling and grinding column 6 is the same as the conical angle of the cone at the expansion section 5 of the roller 4, the conical structure at the lower part of the milling and grinding column mainly grinds and mills a damaged sleeve during milling and grinding operation, the roller can rotate, the expansion section of the roller extrudes and expands the sleeve along with the rotation of the milling and grinding column, the expansion section does not rotate and only expands the sleeve under the pressure of a drill rod, the gauge section keeps the expanded pressure and diameter, the deformation stress generated by the expansion section is removed, the hole expansion effect is ensured, and the torque of the drill rod is reduced;
the lower part of the milling and grinding column 6 is of a conical structure, and the outer conical surface of the milling and grinding column is provided with a plurality of spiral guide and grinding grooves 10 to guide the crushed grinding cut by the milling and grinding column 6, so that the crushing and accumulation are avoided, and the milling and grinding effect is reduced;
the lower part of the milling and grinding column 6 is of a conical structure, and a tungsten carbide coating 7 is sintered on the outer conical surface of the milling and grinding column to serve as a front-section milling and grinding material;
the drilling fluid milling and grinding device is characterized in that an inner hole is formed in the center of the upper connector 1 and the milling and grinding column 6, a counter bore 14 which is not communicated with the bottom is formed in the center of the milling and grinding column 6, and a plurality of through holes 9 are formed in the outer surface of a cone at the lower portion of the milling and grinding column 6 and communicated with the counter bore 14 in the center for enabling drilling fluid to enter a milling and grinding surface.
The guide rod 8 is divided into a cylindrical section 11 at the upper part and a conical section 12 at the lower part, the bottom of the conical section 12 is hemispherical as a front guide, and the cylindrical and conical structures can penetrate into the sleeve with reduced diameter, breakage and dislocation bending, and can also ensure certain strength.
The conical section 12 of the guide rod 8 cuts a planar pen point 13 obliquely at the bottom of the conical section 12 along the hemispherical center, and the pen point 13 and the edge of the conical section 12 form two sharp cutting edges which can cut and scrape when the guide process encounters jamming, thereby being beneficial to milling operation under various complex conditions.
The roller 4 is made of high-carbon high-speed steel which has high wear resistance and hardness, long service life and good expansion effect.
The hole corrector 15 is formed by sintering a tungsten carbide coating on the top excircle of the diameter-keeping section 3, and is used as the last process of milling, so that the hole-enlarging effect can be strengthened, and the clamping prevention on a milling cone is facilitated.
The utility model discloses a set up the guide rod and will mill the awl guide and get into sleeve pipe defect position, the rotatory mill post that mills grinds the expansion section of milling operation and irrotational roller to the sleeve pipe and extrude the reaming to the sleeve pipe, and the casing pipe deformation stress is eliminated to the gage section, and the positive hole ware is further restoreed the sleeve pipe, improves when having reduced the operation moment of torsion of drilling rod and mills grinding efficiency to reduce the risk of casing wall attenuation, improved sheathed tube rate of utilization.
Claims (5)
1. The utility model provides a mill and expand integrative milling awl, includes top connection (1), its characterized in that: an inner screw thread is arranged in an inner hole in the upper part of the upper joint (1), a milling and grinding column (6) is connected with a threaded hole in the lower part of the upper joint (1) in a threaded manner, a roller (4) is connected to a cylinder of the milling and grinding column (6) in threaded connection with the upper joint (1) through a bearing (2), and the lower end of the milling and grinding column (6) is in threaded connection with a guide rod (8);
the outer circle of the roller (4) is divided into a cylindrical gauge section (3) and a conical expansion section (5), the top of the gauge section is provided with a hole aligning device (15), the lower part of the milling and grinding column (6) is of a conical structure, and the conical angle of the cone at the lower part of the milling and grinding column (6) is the same as the conical angle of the expansion section (5) of the roller (4);
the lower part of the milling and grinding column (6) is of a conical structure, and the outer conical surface of the milling and grinding column is provided with a plurality of spiral guide and cutting grooves (10);
the lower part of the milling and grinding column (6) is of a conical structure, and a tungsten carbide coating (7) is sintered on the outer conical surface of the milling and grinding column;
the upper connector (1) and the milling and grinding column (6) are provided with an inner hole in the center, a counter bore (14) which is not communicated with the bottom is formed in the center of the milling and grinding column (6), and a plurality of through holes (9) are formed in the outer surface of a cone at the lower part of the milling and grinding column (6) and communicated with the counter bore (14) in the center.
2. The milling and expanding integrated milling cone as claimed in claim 1, wherein: the guide rod (8) is divided into a cylindrical section (11) at the upper part and a conical section (12) at the lower part, and the bottom of the conical section (12) is hemispherical.
3. The milling and expanding integrated milling cone as claimed in claim 1, wherein: the conical section (12) of the guide rod (8) is obliquely cut into a planar pen point (13) along the hemispherical center at the bottom of the conical section (12).
4. The milling and expanding integrated milling cone as claimed in claim 1, wherein: the roller (4) is made of high-carbon high-speed steel.
5. The milling and expanding integrated milling cone as claimed in claim 1, wherein: the hole rectifier (15) is formed by sintering a tungsten carbide coating on the top excircle of the diameter-keeping section (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748494.6U CN210598887U (en) | 2019-10-17 | 2019-10-17 | Mill and expand integrative awl of milling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748494.6U CN210598887U (en) | 2019-10-17 | 2019-10-17 | Mill and expand integrative awl of milling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210598887U true CN210598887U (en) | 2020-05-22 |
Family
ID=70697552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921748494.6U Active CN210598887U (en) | 2019-10-17 | 2019-10-17 | Mill and expand integrative awl of milling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210598887U (en) |
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2019
- 2019-10-17 CN CN201921748494.6U patent/CN210598887U/en active Active
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