CN1292143C - Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill - Google Patents
Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill Download PDFInfo
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- CN1292143C CN1292143C CN 02149095 CN02149095A CN1292143C CN 1292143 C CN1292143 C CN 1292143C CN 02149095 CN02149095 CN 02149095 CN 02149095 A CN02149095 A CN 02149095A CN 1292143 C CN1292143 C CN 1292143C
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- bearing
- thrust bearing
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- transmission shaft
- rolling bearing
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Abstract
The present invention relates to a transmission shaft for a downhole power drill tool with metal rubber thrust bearings and rolling bearings, which at least comprises an upper radial hard alloy slide bearing 1, an upper axial metal rubber thrust bearing 2, a rolling bearing set 3, a lower axial metal rubber thrust bearing 4, an anti-falling mechanism 5, a lower radial hard alloy slide bearing 6, an outer shell body 7, a shaft 8, etc., wherein the upper position B of the lower radial hard alloy slide bearing 6 of the shaft 8 is provided with a through hole for balancing pressure. When the transmission shaft is at work, the flow quantity of well drilling liquid which flows through gaps of the friction surfaces of the hard alloy slide bearings and the rolling bearing set is proper, and the long service lives of the hard alloy slide bearings, the metal rubber thrust bearings and the rolling bearing set under the conditions of sufficient cooling and lubrication are ensured. The transmission shaft has the characteristics of reliable operation, easy initiation, convenient change of wearing parts, etc.
Description
Technical field
The present invention relates to field mud motor power transmission shafts such as a kind of oil, mine, coalfield, gas field, the mud motor power transmission shaft that especially a kind of application life is long with metal-rubber thrust bearing and rolling bearing.Belong to machinery manufacturing technology field.
Background technology
Because the restriction of service condition, the mud motor (as helicoid hydraulic motor, turbodrill etc.) in fields such as oil, mine, coalfield, gas field all is forced to make tubulose, and diameter is limited.It is very big to design the power drilling tool difficulty that intensity, performance, working life can both meet the demands in limited space, the key that improves mud motor complete machine performance is to improve the working life of mud motor power transmission shaft, domestic and international countless scientific worker is devoted for years to the research in this respect, obtained some achievements, but also very not satisfactory.Adopt open architecture as present turbodrill and screw drill transmission shaft, utilize drilling well working solution (mud) cooling and lubricating bearing, even select best material and Technology for Heating Processing for use, have only 50～100 hours the average length of working life of its consumable accessory, and the time marquis consumable accessory working life that the drilling well working solution purifies is the longest also to be no more than 150 hours.
Whole concrete structure as shown in Figure 1, two circle rolling bearing group structures as shown in Figure 5, four circle rolling bearing group structures are as shown in Figure 4.Mainly radially radially carbide sliding bearing, shell body 7, axle 8 etc. are formed carbide sliding bearing, rolling bearing group, bottom by top.Wherein, top radially carbide sliding bearing moving-coil 1a, rolling bearing group moving-coil 3b, bottom radially carbide sliding bearing moving-coil 6a etc. be contained in successively on the axle 8, by be close to top radially the clamp nut of carbide sliding bearing moving-coil 1a be pressed on the axle 8, constitute the rotating part of power transmission shaft; The top radially quiet circle of carbide sliding bearing 1b, the quiet circle of rolling bearing group 3c etc. is contained in the shell body 7 successively, by the bottom radially the quiet circle of carbide sliding bearing 6b be pressed in the shell body 7, constitute the stationary part of power transmission shaft.
When axle behind the underground work certain hour D cross section and near dangerouse cross-section generation fatigue failure when fracture, the bottom spindle nose of axle might fall well with drill bit or other instrument on it, causes extra greater loss often.
Summary of the invention
The objective of the invention is at the deficiency of prior art and the mud motor power transmission shaft of a kind of tool metal-rubber thrust bearing and rolling bearing is provided, it had than the long life, and safe in utilization.
The object of the present invention is achieved like this: a kind of mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing which comprises at least radially radially carbide sliding bearing and the outer shell body that is provided with of each bearing of carbide sliding bearing, rolling bearing group, bottom of axle, the top that is provided with in regular turn of axle side.Wherein, the metal-rubber thrust bearing is set between rolling bearing group and sliding bearing, the metal-rubber thrust bearing is made of thrust bearing rotating ring and thrust bearing stationary ring, and wherein the thrust bearing rotating ring is contained on the axle, and the thrust bearing stationary ring is contained in the shell body.Be fixed with wear-resistance and oil-resistance rubber in metal-rubber thrust bearing stationary ring or rotating ring axial two or an end face groove, rotating ring or stationary ring axial two or an end face have carried out the case hardening processing, hardness HRC50～70.Metal-rubber thrust bearing axial play momentum is 1.0mm～5.0mm.
The metal-rubber thrust bearing is arranged on the top and/or the bottom of rolling bearing group.The metal-rubber thrust bearing is more than the one-level, for example 1～20 grade.
Have again, the present invention in the bottom radially above the carbide sliding bearing, be provided with anti-lost mechanism between the axle of metal-rubber thrust bearing and the shell body, the diameter of the evagination shoulder that encircles anti-lost mechanism in is greater than anti-lost mechanism outer shroud endoporus minimum diameter and/or the bottom quiet circle internal diameter of carbide sliding bearing radially.
The axle bottom radially carbide sliding bearing the top position the axle on offer the pressure balance through hole, it is more than one that the pressure balance through hole can be, and for example is 3.
According to the technique scheme analysis as can be known, the present invention is simple and reasonable for structure, has long application life, and can prevent the bottom radially carbide sliding bearing and axle the cross section, junction and near dangerouse cross-section generation fatigue failure when rupturing, the bottom spindle nose of axle and drill bit or other instrument on it does not fall well, in order to avoid cause bigger loss.
Description of drawings
Fig. 1 is a kind of four circle rolling bearing group transmission shaft structure schematic diagrames of the present invention.
Fig. 2 is a kind of two circle rolling bearing group mixed drive axle construction schematic diagrames of the present invention.
Fig. 3 is a metal-rubber thrust bearing group structural representation of the present invention.
Fig. 4 is four circle rolling bearing group structural representations
Fig. 5 is two circle rolling bearing group structural representations
Fig. 6 is two circle rolling bearing group transmission shaft structure schematic diagrames in the prior art.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done detailed description further.
Referring to Fig. 1,3, the present invention is a kind of mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing.It mainly by top radially carbide sliding bearing, upper axial metal-rubber thrust bearing, rolling bearing group, lower shaft radially carbide sliding bearing, shell body 7, axle 8 etc. are formed to metal-rubber thrust bearing, anti-lost mechanism, bottom.Top radially carbide sliding bearing moving-coil 1a, upper axial metal-rubber thrust bearing rotating ring 2a, rolling bearing group moving-coil 3b, lower shaft in metal-rubber thrust bearing rotating ring 4a, anti-lost mechanism, encircle 5a, bottom radially carbide sliding bearing moving-coil 6a etc. be contained in successively on the axle 8, by be close to top radially the clamp nut of carbide sliding bearing moving-coil 1a be pressed on the axle 8, constitute the rotating part of power transmission shaft; The top radially quiet circle of carbide sliding bearing 1b, upper axial metal-rubber thrust bearing stationary ring 2b, the quiet circle of rolling bearing group 3c, lower shaft is contained in the shell body 7 successively to metal-rubber thrust bearing stationary ring 4b, the anti-lost outer shroud 5b of mechanism etc., by the bottom radially the quiet circle of carbide sliding bearing 6b be pressed in the shell body 7, constitute the stationary part of power transmission shaft.Embodiment shown in Figure 2 and Fig. 1 different only be the setting of rolling bearing group, other structures are unanimity.
Cooperate Fig. 1,2, the life-span that the key of raising mud motor power transmission shaft working life is how to improve the power transmission shaft consumable accessory.The main consumable accessory of mud motor power transmission shaft is a bearing.Existing transmission shaft structure has only the rolling bearing group to bear axial load, and more by the mud flow rate in rolling bearing group rubbing surface gap, causes the rolling bearing group to descend quick-wearing in drilling fluid abrasive wear condition.The present invention has increased by 0～20 grade of axial metal-rubber thrust bearing on existing transmission shaft structure basis, these metal-rubber thrust bearings are assemblied in the top and/or the bottom of rolling bearing group.The axial play momentum of metal-rubber thrust bearing is 1.0mm～5.0mm, and the axial play momentum of rolling bearing group is 0.5mm～1.0mm, therefore metal-rubber thrust bearing and rolling bearing group are born axial load jointly after the rolling bearing group may wear to a certain degree, thereby guarantee that novel power transmission shaft is longer than existing power transmission shaft working life.Be fixed with wear-resistance and oil-resistance rubber in metal-rubber thrust bearing stationary ring or rotating ring axial two or an end face groove, rotating ring or stationary ring axial two or an end face have carried out the case hardening processing, hardness HRC50～70 make it have good abrasion resistance under the bad working environments condition.
The radial clearance of the radially carbide sliding bearing of rolling bearing group above and below is 0.1mm～0.8mm, top radially carbide sliding bearing rubbing surface length is 50～200mm, bottom radially carbide sliding bearing rubbing surface length is 100～300mm, so just can guarantee that metal-rubber thrust bearing and rolling bearing group in the power transmission shaft only bear axial load, only allow the drilling fluid that contains in right amount than the granule particle enter in the bearing bore, bearing is lubricated and cools off, do not influence the jeting effect of drill bit again.Radially carbide sliding bearing moving-coil outer round surface and quiet circle internal circular surfaces are inlaid with wearable hard alloy, the hardness height of carbide alloy, abrasion resistance is good, can be under the bad working environments condition works fine, the life-span is longer.
In addition, the present invention in axle 8 bottoms radially the B place, top position of carbide sliding bearing moving-coil 6a pressure balance through hole 9 is arranged.According to fluid mechanics principle, Δ P falls in the pressure of A, D point-to-point transmission
AD, Δ P falls in the pressure of A, B point-to-point transmission
AB(linear loss of working fluid pressure is very little), Δ P falls in the pressure of B, C point-to-point transmission
Bc(pressure at C point place is bottom pressure, Δ P
BcBe bit pressuredrop), Δ P falls in the pressure of C, D point-to-point transmission
CD, Δ P falls in the pressure of A, F point-to-point transmission
AF, Δ P falls in the pressure of F, E point-to-point transmission
FE, Δ P falls in the pressure of A, F point-to-point transmission
AFBetween have a following relation:
ΔP
AD＝ΔP
AB+ΔP
BC+ΔP
CD＝ΔP
AF+ΔP
FE+ΔP
ED＝ΔP
AB+P
BE+ΔP
ED
According to following formula Δ P is arranged
AF+ Δ P
FE=Δ P
AB+ Δ P
BE, Δ P
BC+ Δ P
CD=P
BE+ Δ P
ED
Because Δ P
AF, Δ P
CD, Δ P
BEAll very little, can ignore, therefore have
ΔP
FE≈ΔP
AB，ΔP
ED≈ΔP
BC。
Because Δ P
ABWith Δ P
BCCompare very little, so Δ P
FEWith Δ P
EDCompare also very little.
Because top radially carbide sliding bearing moving-coil 1a is 0.1～0.8mm with radial clearance between the quiet circle 1b, compare with axle 8 diameter of bore Φ 20～Φ 60mm very little, so power transmission shaft when working at less pressure differential deltap P
FEAn amount of by the drilling fluid in carbide sliding bearing, metal-rubber thrust bearing and rolling bearing group rubbing surface gap down, thus guarantee that carbide sliding bearing, metal-rubber thrust bearing and rolling bearing group are fully having sufficiently long working life under the cooling and lubricating condition.
In addition, cause all the other component of well inter-axle shaft not fall well for preventing axle from the fracture of D section, this novel practical has designed anti-lost mechanism.The diameter of the evagination shoulder of ring is all bigger than anti-lost mechanism outer shroud endoporus minimum diameter and/or the quiet circle internal diameter of power transmission shaft bottom carbide sliding bearing in the anti-lost mechanism of power transmission shaft, when axle behind the underground work certain hour D cross section and near dangerouse cross-section generation fatigue failure when fracture, the bottom spindle nose of axle might fall well with drill bit or other instrument on it.The present invention can stop remainder split axle and last other part of axle not to fall well after above-mentioned anti-lost mechanism has been arranged, in order to avoid cause bigger loss.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1, a kind of mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing, the top that it comprises axle, be provided with on the axle in regular turn is carbide sliding bearing, rolling bearing group, the bottom shell body of carbide sliding bearing and the outer setting of each bearing radially radially, it is characterized in that: the metal-rubber thrust bearing is set between rolling bearing group and sliding bearing, the metal-rubber thrust bearing is made of thrust bearing rotating ring and thrust bearing stationary ring, wherein the thrust bearing rotating ring is contained on the axle, and the thrust bearing stationary ring is contained in the shell body.
2, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 1, it is characterized in that: be fixed with wear-resistance and oil-resistance rubber in metal-rubber thrust bearing stationary ring or rotating ring axial two or an end face groove, rotating ring or stationary ring axial two or an end face have carried out the case hardening processing.
3, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 2 is characterized in that: hardness HRC50～70.
4, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 1 is characterized in that: metal-rubber thrust bearing axial play momentum is 1.0mm～5.0mm.
5, according to claim 1 or 2 or 3 or 4 described mud motor power transmission shafts with metal-rubber thrust bearing and rolling bearing, it is characterized in that: the metal-rubber thrust bearing is arranged on the top or the bottom of rolling bearing group.
6, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 5, it is characterized in that: the metal-rubber thrust bearing is more than the one-level.
7, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 5, it is characterized in that: the rolling bearing group is more than the one-level.
8, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 1, it is characterized in that: in the bottom radially above the carbide sliding bearing, be provided with anti-lost mechanism between axle and the shell body, the diameter of the evagination shoulder that encircles anti-lost mechanism in is greater than anti-lost mechanism outer shroud endoporus minimum diameter and the bottom quiet circle internal diameter of carbide sliding bearing radially.
9, according to claim 1 or 8 described mud motor power transmission shafts, it is characterized in that with metal-rubber thrust bearing and rolling bearing: the axle bottom radially carbide sliding bearing the top position the axle on offer the pressure balance through hole.
10, the mud motor power transmission shaft with metal-rubber thrust bearing and rolling bearing according to claim 9, it is characterized in that: the pressure balance through hole is more than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02149095 CN1292143C (en) | 2002-11-22 | 2002-11-22 | Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02149095 CN1292143C (en) | 2002-11-22 | 2002-11-22 | Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1502782A CN1502782A (en) | 2004-06-09 |
| CN1292143C true CN1292143C (en) | 2006-12-27 |
Family
ID=34233493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02149095 Expired - Fee Related CN1292143C (en) | 2002-11-22 | 2002-11-22 | Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1292143C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434354A (en) * | 2011-12-26 | 2012-05-02 | 江汉石油钻头股份有限公司 | Hydraulic balance device for turbine section of high-speed turbine drill |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365286C (en) * | 2004-07-14 | 2008-01-30 | 江苏大学 | Precision casted stainless steel well pump |
| CN103615193A (en) * | 2013-11-20 | 2014-03-05 | 山东陆海石油装备有限公司 | Anti-dropping transmission shaft assembly for positive displacement motor |
| CN111457004B (en) * | 2020-04-09 | 2024-05-14 | 中国石油大学(北京) | Sliding bearing assembly with radial centralizing and axial thrust functions |
| CN112879422B (en) * | 2021-02-04 | 2022-07-01 | 中国地质科学院勘探技术研究所 | Novel combined thrust bearing group for downhole motor |
| CN112901654B (en) * | 2021-02-04 | 2022-06-28 | 中国地质科学院勘探技术研究所 | PDC plane thrust bearing set of downhole motor |
-
2002
- 2002-11-22 CN CN 02149095 patent/CN1292143C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434354A (en) * | 2011-12-26 | 2012-05-02 | 江汉石油钻头股份有限公司 | Hydraulic balance device for turbine section of high-speed turbine drill |
| CN102434354B (en) * | 2011-12-26 | 2014-04-09 | 江汉石油钻头股份有限公司 | Hydraulic balance device for turbine section of high-speed turbine drill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1502782A (en) | 2004-06-09 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20061227 |