CN111219153A - Integrated drill rod and drilling tool slope sleeve moving system and matching method thereof - Google Patents
Integrated drill rod and drilling tool slope sleeve moving system and matching method thereof Download PDFInfo
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- CN111219153A CN111219153A CN202010133196.7A CN202010133196A CN111219153A CN 111219153 A CN111219153 A CN 111219153A CN 202010133196 A CN202010133196 A CN 202010133196A CN 111219153 A CN111219153 A CN 111219153A
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- 238000005553 drilling Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 80
- 238000005096 rolling process Methods 0.000 claims abstract description 23
- 238000003754 machining Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 abstract description 4
- 238000006062 fragmentation reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000002994 raw material Substances 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
-
- 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
- E21B12/00—Accessories for drilling tools
- E21B12/04—Drill bit protectors
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an integrated drill rod drilling tool slope moving sleeve system and a matching method thereof, wherein the slope moving sleeve system adopted by the method comprises the following steps: the outer wall of the slope semicircular raceway movable sleeve body in the axial direction is provided with a single slope semicircular raceway which has the same interval and is used for accommodating the rolling bodies; the slope semicircular raceway and the semicircular raceway formed by the two radially corresponding static sleeves form a slope annular raceway of the rolling body; the valley bottom radial diameter line of each slope semicircular raceway on the slope semicircular raceway movable sleeve body is parallel to a semicircular raceway combination gap line formed by two static sleeves on one side in the same direction; one side of each slope semicircular raceway of the slope semicircular raceway movable sleeve body is a slope, and the other side of each slope semicircular raceway is an arc raceway, wherein the included angle between the slope and the axial lead is 15-60 degrees. The invention works under the axial pressure of the drill rod with large load, has the advantages of anti-fragmentation, wear resistance and impact resistance, keeps the structural form intact and has long bearing life. And the whole replacement is realized, and the assembly and disassembly are convenient.
Description
Technical Field
The invention relates to the technical field of drill pipe drilling tools, in particular to an integrated drill pipe drilling tool slope sleeve moving system and a matching method thereof.
Background
At present, the drill rod and drilling tool moving sleeves used globally are moving sleeve sets formed by a plurality of single moving sleeves, such as the drill rod and drilling tool moving sleeve sets adopted in the U.S. and Russia, each single moving sleeve of a combined moving sleeve set is generally adopted and is correspondingly formed with each single static sleeve of a static sleeve set, a rolling path of a rolling element moves, and when a drill rod works under a heavy load, a certain single moving sleeve of the moving sleeve set on the drill rod and drilling tool, namely the moving sleeve set comprises a static sleeve 1, a static sleeve end 2, a moving sleeve 3, a moving sleeve end 4, and a rolling element 5 and a drill rod 6 which are connected, as shown in figure 1. When the drill rod works under a heavy load, a single movable sleeve 3 of the movable sleeve group on the drill rod drilling tool is extremely easy to damage under the axial pressure of 10-30 tons of heavy load, and in order to ensure that the drill rod drilling tool is not continuously damaged, the work must be stopped, the movable sleeve group is integrally replaced, and the task time of the project is delayed, so that equipment capable of overcoming the defects is needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention mainly solves the technical problem of providing an integrated drill rod and drill tool moving sleeve system and a matching method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
an integrated drill pipe and drill tool slope sleeve system, said slope sleeve system comprising: the inner wall of the slope semicircular raceway movable sleeve body is provided with an inner diameter hole matched with the drill rod; the outer wall of the slope semicircular raceway movable sleeve body in the axial direction is provided with a single slope semicircular raceway which is used for accommodating the rolling bodies and has the same interval;
each semicircular raceway of the slope semicircular raceway movable sleeve body and a semicircular raceway formed by two radially corresponding static sleeves form a slope annular raceway of the rolling body;
the valley bottom radial diameter line of each semicircular raceway on the slope semicircular raceway movable sleeve body is parallel to a semicircular raceway combination gap line formed by two static sleeves on one side in the same direction, or parallel to a semicircular raceway combination gap line formed by two static sleeves on the other side in the same direction;
one side of each slope semicircular roller path is provided with a slope, the other side of each slope semicircular roller path is provided with an arc roller path, and the section straight line of the slope is tangent to the section arc line of the arc roller path; wherein the included angle between the straight line of the section of the slope and the axial lead of the section of the movable sleeve body of the slope semicircular roller path is set to be 15-60 degrees.
The integrated drill rod drilling tool slope moving sleeve system is characterized in that a combination gap line of semicircular raceways formed by the two static sleeves is an oblique gap line, the combination gap line and the valley bottom radial diameter line of each semicircular raceway on the slope semicircular raceway moving sleeve body are in different directions to form an asymmetric static sleeve, one end of the asymmetric static sleeve is a raceway arc line, and the other end of the asymmetric static sleeve is a slope raceway arc line.
The integrated drill rod drilling tool slope moving sleeve system is characterized in that a combination gap line of a semicircular raceway formed by two static sleeves is superposed with a valley bottom radial diameter line of each semicircular raceway on a slope semicircular raceway moving sleeve body to form symmetrical static sleeves, and 1/4 raceway arc lines at two ends of each symmetrical static sleeve are equal.
The integrated drill rod drilling tool slope moving sleeve system is characterized in that the axial outer wall of the slope semicircular raceway moving sleeve body is provided with the slope semicircular raceway numbers with the same odd number interval of 5 or the slope semicircular raceway numbers with the same odd number interval of 7, 9, 11 and 13.
The matching method of the integrated drill rod drilling tool slope moving sleeve system is formed by matching and connecting a slope semicircular raceway of the integrated drill rod drilling tool slope moving sleeve and a combined asymmetric static sleeve, and comprises the following steps of:
1) preparing an integrated drill rod drilling tool slope moving sleeve, firstly casting and processing an integrated slope semicircular raceway moving sleeve body 7 of a pipe body structure, and then machining an inner diameter hole formed by matching the inner wall of the slope semicircular raceway moving sleeve body 7 and a drill rod 6; then machining the slope semicircular roller path which is used for accommodating the rolling bodies 5 and has the same distance with the axial outer wall of the slope semicircular roller path movable sleeve body 7;
one side of each processed slope semicircular roller path is a slope, and the other side of each processed slope semicircular roller path is an arc roller path, wherein the section straight line of the slope is tangent to the section arc line of the arc roller path;
wherein the included angle between the straight line of the section of the processed slope and the axial lead of the section of the movable sleeve body of the slope semicircular roller path is set to be 15-60 degrees;
the R channel and the groove of each slope semicircular roller path required to be processed are the same, namely, the slope semicircular roller path movable sleeve body is processed into a single number: for example, the R channels and the grooves of each slope semicircular roller path with a plurality of 5, 7, 9, 11 and 13 are the same, and the intervals are the same;
2) preparing an asymmetric static sleeve matched with the slope moving sleeve of the integrated drill rod drilling tool;
a. processing an end static sleeve of the asymmetric static sleeve matched with a semicircular raceway at the starting end or the terminal end of the slope movable sleeve of the integrated drill rod drilling tool;
b. processing an asymmetric static sleeve between static sleeves matched with a semicircular raceway between the starting end and the terminal end of a slope movable sleeve of the integrated drill rod drilling tool;
the combination seam line of the semicircular roller path formed by the two processed static sleeves is an oblique seam line which is opposite to the valley bottom radial diameter line 8 of each inclined semicircular roller path on the integrated inclined semicircular roller path movable sleeve body 7, so that an asymmetric static sleeve is formed;
3) matching: firstly, matching each slope semicircular raceway between the starting end and the terminal end of the slope moving sleeve of the integrated drill rod drilling tool with a middle static sleeve of the asymmetric static sleeve, and matching the slope semicircular raceways of the starting end or the terminal end of the slope moving sleeve of the integrated drill rod drilling tool with an end static sleeve of the asymmetric static sleeve; and finally, placing rolling bodies in an annular runway formed by each slope semicircular raceway of the integrated drill rod drilling tool slope moving sleeve and each semicircular raceway matched with the combined asymmetric static sleeve to form a rolling system of the integrated drill rod drilling tool slope moving sleeve.
Due to the adoption of the technical scheme, the invention has the following advantages:
the integrated drill rod and drilling tool slope sleeve moving system and the matching method thereof have the advantages of anti-fragmentation, wear resistance and impact resistance when the drill rod works under the axial pressure of large load of 30 tons, the structural form of the system is kept intact, the bearing life is long, and the applicability is strong. The integral slope movable sleeve structure is integrally replaced, is convenient to assemble and disassemble, and can ensure the time for completing engineering tasks. And the defects of the prior movable sleeve sets that a plurality of single movable sleeves are troublesome to disassemble and assemble can be overcome, the processing procedure is simple, and raw materials are saved.
Drawings
FIG. 1 is a schematic diagram of a multi-sleeve system of a drill pipe drilling tool in the prior art.
Fig. 2 is a structural schematic diagram of an integrated drill pipe drilling tool slope sleeve system.
Fig. 3 is a schematic structural section view of a slope semicircular raceway movable sleeve body, wherein a valley bottom radial diameter line of the slope semicircular raceway movable sleeve body is parallel to a semicircular raceway combination gap line formed by two static sleeves on one side of the slope semicircular raceway movable sleeve body.
Fig. 4 and 5 are schematic structural cross-sectional views of the semicircular raceway formed by the two stationary sleeves and the gap line 7, which are oblique lines and intersect with the valley bottom radial diameter line of the semicircular raceway on the integrated movable sleeve.
Fig. 6 is a structural schematic diagram of the coincidence of the valley bottom radial diameter line of each semicircular raceway on the slope movable sleeve body and the combination line of the semicircular raceways formed by the two stationary sleeves.
Fig. 7 is a structural schematic diagram of a slope semicircular raceway movable sleeve body.
FIG. 8 is a cross-sectional view of a semi-circular raceway formed by two stationary sleeves.
FIG. 9 is a cross-sectional view of a semi-circular raceway formed by two stationary sleeves.
In the figure: the drill rod comprises a static sleeve 1, a static sleeve end 2, a movable sleeve 3, a movable sleeve end 4, a rolling body 5, a drill rod 6, a slope semicircular raceway movable sleeve body 7, a slope semicircular raceway 7.1, a slope 7.11, an arc raceway 7.12, a slope included angle 7.2, a valley bottom radial diameter line 8 and a semicircular raceway combination gap line 9.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
As shown in fig. 2, the integrated drill pipe and drill tool slope sleeve system comprises: the inner wall of the slope semicircular raceway movable sleeve body 7 of the pipe body structure is provided with an inner diameter hole matched with the drill rod 6; the outer wall of the slope semicircular raceway movable sleeve body 7 in the axial direction is provided with a single slope semicircular raceway 7.1 which is used for accommodating the rolling bodies 5 and has the same interval.
Each semicircular raceway of the slope semicircular raceway movable sleeve body 7 and the semicircular raceways formed by the two static sleeves 1 corresponding to the semicircular raceways in the radial direction form a slope annular raceway of the rolling body 5.
The valley bottom radial diameter line 8 of each semicircular raceway on the slope semicircular raceway movable sleeve body 7 is parallel to a semicircular raceway joint gap line 9 formed by two static sleeves 1 on one side in the same direction, and the slope semicircular raceway movable sleeve body 7 or the semicircular raceway joint gap line 9 formed by two static sleeves 1 on the other side in the same direction; as shown in fig. 3.
The integrated drill rod drilling tool slope moving sleeve system formed by the asymmetric static sleeves is characterized in that a combination gap line 9 of the semicircular raceways formed by the two static sleeves is an oblique seam line, the combination gap line and a valley bottom radial diameter line 8 of each semicircular raceway on the slope semicircular raceway moving sleeve body 7 are in different directions to form the asymmetric static sleeves, and raceway arc lines 1.2 at one end of each asymmetric static sleeve are larger than raceway arc lines 1.1 at the other end of each asymmetric static sleeve. As shown in fig. 4, 5, 9. The direction of the bonding slit line 9 in fig. 4 is opposite to the direction of the bonding slit line 9 in fig. 5.
The integrated drill rod drilling tool slope moving sleeve system formed by the symmetrical static sleeves is characterized in that a combination gap line 9 of the semicircular raceways formed by the two static sleeves is superposed with a valley bottom radial diameter line 8 of each semicircular raceway on the slope semicircular raceway moving sleeve body 7 to form the symmetrical static sleeves, and 1/4 raceway arc lines at two ends of the symmetrical static sleeves are equal. As shown in fig. 6 and 8.
One side of each slope semicircular raceway 7.1 on the slope semicircular raceway movable sleeve body 7 is provided with a slope 7.11, the other side of each slope semicircular raceway is provided with an arc raceway 7.12, and a section straight line of the slope 7.11 is tangent to a section arc line of the arc raceway 7.12; wherein the included angle of the straight line of the section of the slope 7.11 and the axial lead of the section of the slope semicircular raceway movable sleeve body 7.2 is set to be 15-60 degrees. As shown in fig. 7.
The outer wall of the slope semicircular raceway movable sleeve body 7 in the axial direction is provided with the same odd number of slope semicircular raceways which are 5 in the same interval, as shown in fig. 7. Or the single-number semi-circular rolling tracks with the same 7, 9, 11 and 13 pitches are processed.
The matching method of the integrated drill rod drilling tool slope moving sleeve system is formed by matching and connecting a slope semicircular raceway of the integrated drill rod drilling tool slope moving sleeve and a combined asymmetric static sleeve, and comprises the following steps of:
1) preparing an integrated drill rod drilling tool slope moving sleeve, firstly casting and processing an integrated slope semicircular raceway moving sleeve body 7 of a pipe body structure, and then machining an inner diameter hole formed by matching the inner wall of the slope semicircular raceway moving sleeve body 7 and a drill rod 6; and machining the slope semicircular raceway which is used for accommodating the rolling bodies 5 and has the same distance with the axial outer wall of the slope semicircular raceway movable sleeve body 7.
One side of each processed slope semicircular raceway 7.1 is a slope 7.11, and the other side is an arc raceway 7.12, wherein the section straight line of the slope 7.11 is tangent to the section arc line of the arc raceway 7.12.
Wherein the included angle of the section straight line of the processed slope 7.11 and the section axial lead of the slope semicircular raceway movable sleeve body 7.2 is set to be 15-60 degrees. The integrated slope semicircular raceway movable sleeve body 7 works under axial pressure and has the advantages of anti-fragmentation, abrasion resistance and impact resistance; the inclined angle 7.2 is used for conveniently placing the rolling body 5 and storing lubricating oil.
The R channel and the groove of each slope semicircular raceway required to be processed are the same, namely, the slope semicircular raceway movable sleeve body 7 is processed into a single number: for example, the R channels and the grooves of each slope semicircular raceway of a single number of 5, 7, 9, 11 and 13 are identical, and the intervals are identical.
2) And preparing an asymmetric static sleeve matched with the slope moving sleeve of the integrated drill rod drilling tool.
a. And (3) processing an end static sleeve 2 of the asymmetric static sleeve matched with the semicircular raceway at the starting end or the terminal end of the slope movable sleeve of the integrated drill rod drilling tool.
b. And (3) processing an asymmetric static sleeve room static sleeve 1 matched with a semicircular raceway between the starting end and the terminal end of the slope moving sleeve of the integrated drill rod drilling tool.
The combination seam line 9 of the semicircular roller path formed by the two processed static sleeves is an oblique seam line which is opposite to the valley bottom radial diameter line 8 of each inclined semicircular roller path on the integrated inclined semicircular roller path movable sleeve body 7, so that an asymmetric static sleeve is formed; the asymmetric static sleeve works under radial pressure, and the anti-fragmentation, anti-abrasion and impact resistance are improved.
3) Matching: firstly, matching each slope semicircular raceway between the starting end and the terminal end of the slope moving sleeve of the integrated drill rod drilling tool with a middle static sleeve of the asymmetric static sleeve, and matching the slope semicircular raceways of the starting end or the terminal end of the slope moving sleeve of the integrated drill rod drilling tool with an end static sleeve of the asymmetric static sleeve; and finally, placing rolling bodies 5 in an annular runway formed by each slope semicircular raceway of the integrated drill rod drilling tool slope moving sleeve and each semicircular raceway matched with the combined asymmetric static sleeve to form a rolling system of the integrated drill rod drilling tool slope moving sleeve.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. Integral type drilling rod drilling tool slope moves cover system, characterized by: the slope moves set system include: the inner wall of the slope semicircular raceway movable sleeve body (7) is provided with an inner diameter hole matched with the drill rod (6); the axial outer wall of the slope semicircular raceway movable sleeve body (7) is provided with a plurality of slope semicircular raceways (7.1) which have the same interval and are used for accommodating the rolling bodies (5); each slope semicircular raceway of the slope semicircular raceway movable sleeve body (7) and a semicircular raceway formed by two radially corresponding static sleeves (1) form a slope annular raceway of the rolling body (5);
the valley bottom radial diameter line (8) of each slope semicircular raceway on the slope semicircular raceway movable sleeve body (7) is parallel to a semicircular raceway combination gap line (9) formed by two static sleeves (1) on one side in the same direction, or parallel to a semicircular raceway combination gap line (9) formed by two static sleeves (1) on the other side in the same direction;
one side of each slope semicircular raceway (7.1) is provided with a slope (7.11), the other side of each slope semicircular raceway is provided with an arc raceway (7.12), and a section straight line of the slope (7.11) is tangent to a section arc line of the arc raceway (7.12); wherein the included angle (7.2) between the straight section line of the slope (7.11) and the section axial lead of the slope semicircular raceway movable sleeve body (7) is set to be 15-60 degrees.
2. The integrated drill pipe tool ramping sleeve system according to claim 1, wherein: the combination gap line (9) of the semicircular raceways formed by the two static sleeves is an oblique seam line, the combination gap line and the valley bottom radial diameter line (8) of each slope semicircular raceway on the slope semicircular raceway movable sleeve body (7) are in different directions to form an asymmetric static sleeve, and the raceway arc line at one end of the asymmetric static sleeve is larger than that at the other end of the raceway.
3. The integrated drill pipe tool ramping sleeve system according to claim 1, wherein: the combination gap line (9) of the semicircular roller path formed by the two static sleeves is superposed with the valley bottom radial diameter line (8) of each slope semicircular roller path on the slope semicircular roller path movable sleeve body (7) to form a symmetrical static sleeve, and 1/4 roller path arc lines at the two ends of the symmetrical static sleeve are equal.
4. The integrated drill pipe tool ramping sleeve system according to claim 1, wherein: the outer wall of the slope semicircular raceway movable sleeve body (7) in the axial direction is provided with the slope semicircular raceway number with the same odd number interval of 5, or is provided with the slope semicircular raceway number with the same odd number interval of 7, 9, 11 and 13.
5. The method for matching the integrated drill pipe drilling tool slope sleeve system as claimed in claim 1, is characterized in that: the slope semicircular raceway of the slope moving sleeve of the integrated drill rod drilling tool is matched and connected with the combined asymmetric static sleeve, and the method comprises the following steps:
1) preparing an integrated drill rod drilling tool slope moving sleeve, firstly casting and processing an integrated slope semicircular raceway moving sleeve body 7 of a pipe body structure, and then machining an inner diameter hole formed by matching the inner wall of the slope semicircular raceway moving sleeve body 7 and a drill rod 6; then machining the slope semicircular roller path which is used for accommodating the rolling bodies 5 and has the same distance with the axial outer wall of the slope semicircular roller path movable sleeve body 7;
one side of each processed slope semicircular raceway (7.1) is a slope (7.11), and the other side of each processed slope semicircular raceway is an arc raceway (7.12), wherein the section straight line of the slope (7.11) is tangent to the section arc line of the arc raceway (7.12);
wherein an included angle (7.2) between the straight section line of the processed slope (7.11) and the section axial lead of the slope semicircular raceway movable sleeve body (7) is set to be 15-60 degrees;
the R channel and the groove of each slope semicircular roller path required to be processed are the same, namely, the slope semicircular roller path movable sleeve body (7) is processed into a single number: for example, the R channels and the grooves of each slope semicircular roller path with a plurality of 5, 7, 9, 11 and 13 are the same, and the intervals are the same;
2) preparing an asymmetric static sleeve matched with the slope moving sleeve of the integrated drill rod drilling tool;
a. processing an end static sleeve 2 of the asymmetric static sleeve matched with a semicircular raceway at the starting end or the terminal end of the slope movable sleeve of the integrated drill rod drilling tool;
b. processing an asymmetric static sleeve room static sleeve 1 matched with a semicircular raceway between the starting end and the terminal end of a slope moving sleeve of the integrated drill rod drilling tool;
the combination seam line 9 of the semicircular roller path formed by the two processed static sleeves is an oblique seam line which is opposite to the valley bottom radial diameter line 8 of each inclined semicircular roller path on the integrated inclined semicircular roller path movable sleeve body 7, so that an asymmetric static sleeve is formed;
3) matching: firstly, matching each slope semicircular raceway between the starting end and the terminal end of the slope moving sleeve of the integrated drill rod drilling tool with a middle static sleeve of the asymmetric static sleeve, and matching the slope semicircular raceways of the starting end or the terminal end of the slope moving sleeve of the integrated drill rod drilling tool with an end static sleeve of the asymmetric static sleeve; and finally, placing rolling bodies 5 in an annular runway formed by each slope semicircular raceway of the integrated drill rod drilling tool slope moving sleeve and each semicircular raceway matched with the combined asymmetric static sleeve to form a rolling system of the integrated drill rod drilling tool slope moving sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010133196.7A CN111219153A (en) | 2020-03-01 | 2020-03-01 | Integrated drill rod and drilling tool slope sleeve moving system and matching method thereof |
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| CN202010133196.7A CN111219153A (en) | 2020-03-01 | 2020-03-01 | Integrated drill rod and drilling tool slope sleeve moving system and matching method thereof |
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| CN105805167A (en) * | 2016-04-20 | 2016-07-27 | 哈尔滨理工大学 | Novel bearing with inner-ring conical ball track and outer-ring arc-shaped ball track |
| CN106121510A (en) * | 2016-08-25 | 2016-11-16 | 天津立林石油机械有限公司 | Integral type semi-ring driving-shaft assembly |
| RU2649109C1 (en) * | 2016-11-28 | 2018-03-29 | федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) | Anti-friction ball bearing |
| CN109236178A (en) * | 2018-07-31 | 2019-01-18 | 天津立林石油机械有限公司 | Helicoid hydraulic motor buffering driving-shaft assembly |
| CN212177068U (en) * | 2020-03-01 | 2020-12-18 | 伊川县光华轴承厂 | Integrated drill rod and drilling tool slope moving sleeve |
| CN212177067U (en) * | 2020-03-01 | 2020-12-18 | 伊川县光华轴承厂 | Integrated drill rod and drilling tool slope sleeve moving system |
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