CN103615193A - Anti-dropping transmission shaft assembly for positive displacement motor - Google Patents
Anti-dropping transmission shaft assembly for positive displacement motor Download PDFInfo
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- CN103615193A CN103615193A CN201310584212.4A CN201310584212A CN103615193A CN 103615193 A CN103615193 A CN 103615193A CN 201310584212 A CN201310584212 A CN 201310584212A CN 103615193 A CN103615193 A CN 103615193A
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Abstract
The invention discloses an anti-dropping transmission shaft assembly for a positive displacement motor, and relates to the technical field of well drilling tools. The anti-dropping transmission shaft assembly is characterized in that an upper anti-dropping nut is arranged at the front of an upper radial inner bearing sleeve, an adjusting pad is connected to the front of the upper anti-dropping nut, and the outer diameter of the upper anti-dropping nut is larger than the inner diameter of an upper radial outer bearing sleeve; a lower anti-dropping nut is arranged between a thrust bearing and a lower radial inner bearing sleeve, and the outer diameter of the lower anti-dropping nut is larger than the inner diameter of a lower bearing shell; an anti-falling inner sleeve is fixed to a large end of a joint of a transmission shaft and a drill bit, and the lower anti-dropping nut is connected with the anti-falling inner sleeve in a threaded manner. The anti-dropping transmission shaft assembly has the advantages that the upper anti-dropping nut, the lower anti-dropping nut and the anti-falling inner sleeve are respectively arranged at the smallest-diameter position of the front end of the transmission shaft, the middle reducing position of the transmission shaft and the position at the large end of the joint of the transmission shaft and the drill bit, so that the problem that an existing transmission shaft falls into a well due to breakage of a stress concentration position of the existing transmission shaft can be effectively solved, and the anti-dropping transmission shaft assembly is simple in structure and smart in design and is safe and reliable.
Description
Technical field
The present invention relates to drilling tool technical field, relate in particular to the anti-lost driving-shaft assembly of a kind of helicoid hydraulic motor.
Background technology
Helicoid hydraulic motor, weighed displacement motor, is a kind of positive displacement mud motor again, in oil/gas drilling, helicoid hydraulic motor is mainly used in boring special well, also can be used to drilling straight-hole.Helicoid hydraulic motor is mainly comprised of by-pass valve assembly, anti-lost assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly, and driving-shaft assembly is positioned at the lower end of helicoid hydraulic motor, and its effect is that the rotary power that motor is produced passes to drill bit.Power transmission shaft is owing to bearing in drilling process compared with high pulling torque, because the diameter of power transmission shaft changes, at diameter, change from small to big place and screw thread place owing to how much existing stress to concentrate, there is more or less phenomenon of rupture herein, if there is no falling-proof apparatus, the power transmission shaft well that can fall causes the accident, especially for power transmission shaft bottom, connect large end top, drill bit place also anti-lost without any the design of Yi Ge producer at present herein, annual because there is no anti-drop structure herein, and the major accident of holding greatly top to occur fracture and falling well happens occasionally, cause the reliability of existing helicoid hydraulic motor poor.
summary of the invention
The object of this invention is to provide the anti-lost driving-shaft assembly of a kind of helicoid hydraulic motor, to solve the power transmission shaft that prior art exists, there is no anti-drop structure and the problem of the well that falls.
Apparatus of the present invention are mainly by upper journal bearing inner sleeve, upper journal bearing overcoat, thrust bearing, upper bearing (metal) shell, lower bearing shell, lower radial bearing inner sleeve and power transmission shaft form, upper journal bearing inner sleeve and upper journal bearing overcoat are arranged at power transmission shaft front end, thrust bearing is arranged on power transmission shaft middle part, upper bearing (metal) shell is arranged at thrust bearing surface, lower radial bearing inner sleeve is arranged at power transmission shaft rear portion, the outside that lower bearing shell is positioned at lower radial bearing inner sleeve is connected with upper bearing (metal) shell, between thrust bearing and lower bearing shell, thrust ring is set, solving the technical scheme that its technical problem adopts is that a upper anti-lost nut is set before upper journal bearing inner sleeve, upper anti-lost nut the place ahead connects an adjusting pad, the external diameter of upper anti-lost nut is larger than the internal diameter of upper journal bearing overcoat, anti-lost nut under one is set between thrust bearing and lower radial bearing inner sleeve, and the external diameter of lower anti-lost nut is larger than the internal diameter of lower bearing shell, the transmission large end in drill bit place that is coupling is fixed an anticreep inner sleeve by screw, and lower anti-lost nut is connected with anticreep inner sleeve by screw thread.
Between the screw of above-mentioned lower radial bearing inner sleeve and fixedly anticreep inner sleeve, hold-down ring is set.
Apparatus of the present invention by the most tiny position of power transmission shaft point diameter, reducing position, power transmission shaft middle part and the transmission large end position in drill bit place that is coupling arranges respectively anti-lost nut, lower anti-lost nut and anticreep inner sleeve, effectively solved existing power transmission shaft stress concentrated position because fracture causes the fall problem of well of power transmission shaft, have advantages of simple in structure, design ingenious and safe and reliable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
The structural representation of Fig. 1 apparatus of the present invention.
Journal bearing overcoat in journal bearing inner sleeve, 4 on anti-lost nut, 3 on 1 adjusting pad, 2 in figure, 5 thrust bearings, 6 thrust rings, 7 times anti-lost nuts, 8 upper bearing (metal) shells, 9 lower bearing shells, 10 anticreep inner sleeves, 11 lower radial bearing inner sleeves, 12 hold-down rings, 13 screws, 14 power transmission shafts.
The specific embodiment
As shown in the figure, the anti-lost driving-shaft assembly of a kind of helicoid hydraulic motor, mainly by upper journal bearing inner sleeve 3, upper journal bearing overcoat 4, thrust bearing 5, upper bearing (metal) shell 8, lower bearing shell 9, lower radial bearing inner sleeve 11 and power transmission shaft 14 form, upper journal bearing inner sleeve 3 and upper journal bearing overcoat 4 are arranged at power transmission shaft 14 front ends, thrust bearing 5 is arranged on power transmission shaft 14 middle parts, upper bearing (metal) shell 8 is arranged at thrust bearing 5 surfaces, lower radial bearing inner sleeve 11 is arranged at power transmission shaft 14 rear portions, the outside that lower bearing shell 9 is positioned at lower radial bearing inner sleeve 11 is connected with upper bearing (metal) shell 8, between thrust bearing 5 and lower bearing shell 9, thrust ring 6 is set, a upper anti-lost nut 2 is set before upper journal bearing inner sleeve 3, upper anti-lost nut 2 the place aheads connect an adjusting pad 1, as shown in a-quadrant in figure, power transmission shaft 14 has helicitic texture herein, herein owing to being the most tiny part of power transmission shaft diameter, under identical torsional interaction, stress is maximum herein, top also has universal drive shaft that the eccentric motion of motor is transformed into the fixed-axis rotation on power transmission shaft simultaneously, also there is flexural stress herein, so place is subject to stress complicated, the fracture probability occurring is larger, because the restriction of external diameter can not infinitely strengthen, anti-lost nut 2 is set herein, the external diameter of upper anti-lost nut 2 is larger than the internal diameter of upper journal bearing overcoat 3, once power transmission shaft 14, on the top of upper anti-lost nut 2, rupture, the external diameter of upper anti-lost nut 2 also can be blocked and be unlikely to cause falling well by the internal diameter of upper journal bearing overcoat 3, anti-lost nut 7 under one is set between thrust bearing 5 and lower radial bearing inner sleeve 11, as shown in B region in figure, power transmission shaft 14 diameter herein changes from small to big, also there is phenomenon of rupture herein, for anti-lost nut 7 under this problem develop, the external diameter of lower anti-lost nut 7 is larger than the internal diameter of lower bearing shell 9, and same anti-lost nut 7 at present links by screw thread and anticreep inner sleeve 10, once fracture herein, the external diameter of lower equally anti-lost nut 7 also can be blocked by the internal diameter of lower bearing shell 9 and be unlikely to cause falling well, the transmission large end in drill bit place that is coupling is fixed an anticreep inner sleeve by screw, lower anti-lost nut is connected with anticreep inner sleeve by screw thread, between the screw 13 of lower radial bearing inner sleeve 11 and fixedly anticreep inner sleeve 10, hold-down ring 12 is set, as shown in C region in figure, power transmission shaft 14 is also because diameter changes from small to big herein, and below it, connect drill bit, alternating stresses is complicated, there is phenomenon of rupture, for the anti-lost inner sleeve 10 of this problem develop, once fracture herein, anticreep inner sleeve 10 links by high-intensity bolt 13 and the large end of power transmission shaft 14, effectively avoided the well accident that falls that fracture causes herein.
Claims (2)
1. the anti-lost driving-shaft assembly of helicoid hydraulic motor, mainly by upper journal bearing inner sleeve, upper journal bearing overcoat, thrust bearing, upper bearing (metal) shell, lower bearing shell, lower radial bearing inner sleeve and power transmission shaft form, upper journal bearing inner sleeve and upper journal bearing overcoat are arranged at power transmission shaft front end, thrust bearing is arranged on power transmission shaft middle part, upper bearing (metal) shell is arranged at thrust bearing surface, lower radial bearing inner sleeve is arranged at power transmission shaft rear portion, the outside that lower bearing shell is positioned at lower radial bearing inner sleeve is connected with upper bearing (metal) shell, between thrust bearing and lower bearing shell, thrust ring is set, it is characterized in that, before journal bearing inner sleeve, a upper anti-lost nut is set, upper anti-lost nut the place ahead connects an adjusting pad, the external diameter of upper anti-lost nut is larger than the internal diameter of upper journal bearing overcoat, anti-lost nut under one is set between thrust bearing and lower radial bearing inner sleeve, and the external diameter of lower anti-lost nut is larger than the internal diameter of lower bearing shell, the transmission large end in drill bit place that is coupling is fixed an anticreep inner sleeve by screw, and lower anti-lost nut is connected with anticreep inner sleeve by screw thread.
2. the anti-lost driving-shaft assembly of helicoid hydraulic motor according to claim 1, is characterized in that lower radial bearing inner sleeve and fixedly between the screw of anticreep inner sleeve, hold-down ring is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310584212.4A CN103615193A (en) | 2013-11-20 | 2013-11-20 | Anti-dropping transmission shaft assembly for positive displacement motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310584212.4A CN103615193A (en) | 2013-11-20 | 2013-11-20 | Anti-dropping transmission shaft assembly for positive displacement motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103615193A true CN103615193A (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310584212.4A Pending CN103615193A (en) | 2013-11-20 | 2013-11-20 | Anti-dropping transmission shaft assembly for positive displacement motor |
Country Status (1)
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| CN (1) | CN103615193A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278948A (en) * | 2014-09-28 | 2015-01-14 | 扬州天业石油机械有限公司 | Transmission shaft assembly of positive displacement motor drill |
| CN106795739A (en) * | 2014-10-17 | 2017-05-31 | 艾斯米恩控股有限责任公司 | Hammer drill |
| CN110685601A (en) * | 2018-07-06 | 2020-01-14 | 中国石油化工股份有限公司 | Guide screw for drilling tool |
| CN112832671A (en) * | 2020-08-05 | 2021-05-25 | 中石化江钻石油机械有限公司 | Underground power tool with anti-falling mechanism |
Citations (8)
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|---|---|---|---|---|
| US4620601A (en) * | 1981-09-28 | 1986-11-04 | Maurer Engineering Inc. | Well drilling tool with diamond thrust bearings |
| CN1502782A (en) * | 2002-11-22 | 2004-06-09 | 石油大学(北京) | Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill |
| CN201196032Y (en) * | 2008-05-31 | 2009-02-18 | 潍坊盛德石油机械制造有限公司 | Improved anti-falling apparatus for drilling tool transmission shaft |
| CN201460715U (en) * | 2009-05-07 | 2010-05-12 | 天津荣亨集团股份有限公司 | Transmission shaft anti-drop device of screw drilling tool |
| CN201460713U (en) * | 2009-05-31 | 2010-05-12 | 段晋蓉 | Novel anti-dropping transmission shaft assembly |
| CN201606017U (en) * | 2010-02-01 | 2010-10-13 | 辽河石油勘探局 | Anti-falling device of transmission shaft of screw drill |
| CN201778649U (en) * | 2010-08-17 | 2011-03-30 | 山东陆海石油装备有限公司 | Anti-falling screw drill |
| CN203729867U (en) * | 2013-11-20 | 2014-07-23 | 山东陆海石油装备有限公司 | Anti-dropping transmission shaft assembly for screw drilling tool |
-
2013
- 2013-11-20 CN CN201310584212.4A patent/CN103615193A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4620601A (en) * | 1981-09-28 | 1986-11-04 | Maurer Engineering Inc. | Well drilling tool with diamond thrust bearings |
| CN1502782A (en) * | 2002-11-22 | 2004-06-09 | 石油大学(北京) | Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill |
| CN201196032Y (en) * | 2008-05-31 | 2009-02-18 | 潍坊盛德石油机械制造有限公司 | Improved anti-falling apparatus for drilling tool transmission shaft |
| CN201460715U (en) * | 2009-05-07 | 2010-05-12 | 天津荣亨集团股份有限公司 | Transmission shaft anti-drop device of screw drilling tool |
| CN201460713U (en) * | 2009-05-31 | 2010-05-12 | 段晋蓉 | Novel anti-dropping transmission shaft assembly |
| CN201606017U (en) * | 2010-02-01 | 2010-10-13 | 辽河石油勘探局 | Anti-falling device of transmission shaft of screw drill |
| CN201778649U (en) * | 2010-08-17 | 2011-03-30 | 山东陆海石油装备有限公司 | Anti-falling screw drill |
| CN203729867U (en) * | 2013-11-20 | 2014-07-23 | 山东陆海石油装备有限公司 | Anti-dropping transmission shaft assembly for screw drilling tool |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278948A (en) * | 2014-09-28 | 2015-01-14 | 扬州天业石油机械有限公司 | Transmission shaft assembly of positive displacement motor drill |
| CN104278948B (en) * | 2014-09-28 | 2016-07-06 | 扬州天业石油机械有限公司 | A kind of screw drill transmission shaft assembly |
| CN106795739A (en) * | 2014-10-17 | 2017-05-31 | 艾斯米恩控股有限责任公司 | Hammer drill |
| CN110685601A (en) * | 2018-07-06 | 2020-01-14 | 中国石油化工股份有限公司 | Guide screw for drilling tool |
| CN112832671A (en) * | 2020-08-05 | 2021-05-25 | 中石化江钻石油机械有限公司 | Underground power tool with anti-falling mechanism |
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| PB01 | Publication | ||
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| C53 | Correction of patent of invention or patent application | ||
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Address after: 253000 Lingxian County Economic Development Zone, Dezhou, Beichen Road, the middle of the road north of the city of Shandong Applicant after: SHANDONG LUHAI PETROLEUM TECHNOLOGY CO., LTD. Address before: 253000 Lingxian County Economic Development Zone, Dezhou, Beichen Road, the middle of the road north of the city of Shandong Applicant before: Shandong Luhai Petroleum Equipment Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHANDONG LUHAI PETROLEUM EQUIPMENT CO., LTD. TO: SHANDONG LUHAI PETROLEUM TECHNOLOGY CO., LTD. |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20140305 |