CN203097709U - Screw drill drive shaft assembly - Google Patents
Screw drill drive shaft assembly Download PDFInfo
- Publication number
- CN203097709U CN203097709U CN 201220726969 CN201220726969U CN203097709U CN 203097709 U CN203097709 U CN 203097709U CN 201220726969 CN201220726969 CN 201220726969 CN 201220726969 U CN201220726969 U CN 201220726969U CN 203097709 U CN203097709 U CN 203097709U
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- transmission shaft
- power transmission
- radial bearing
- upper shell
- lower house
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Abstract
The utility model discloses a screw drill drive shaft assembly, and belongs to the field of petroleum and nature gas well drilling. The screw drill drive shaft assembly comprises a drive shaft, a drive shaft lower shell body, a lower shell body lower radial bearing, a thrust bearing set, a lower shell body upper radial bearing, a drive shaft upper shell body, an upper shell body lower radial bearing and an upper shell body upper radial bearing, and the lower shell body lower radial bearing, the lower shell body upper radial bearing, the upper shell body lower radial bearing and the upper shell body upper radial bearing are arranged on the drive shaft from bottom to top in sequence. Due to the fact that an upper ordinary radial bearing set, a middle ordinary radial bearing set, a lower ordinary radial bearing set and a set of radial bearing plated with a wearing layer are arranged on the drive shaft, the contact area between the radial bearings and the drive shaft is enlarged, contact stress is reduced, the service life of the radial bearing is prolonged, the contact stress of the lower-value ordinary bearing is higher than the contact stress of the higher-value radial bearing plated with the wear layer, therefore, the ordinary radial bearing reaches the service life first, and thus the service life of the radial bearing plated with the wear layer is prolonged.
Description
Technical field
The utility model relates to oil, gas drilling field, particularly a kind of screw drill transmission shaft assembly.
Background technology
Along with the development of petroleum natural gas exploration, increasing helicoid hydraulic motor is applied to drillng operations such as deep-well, ultradeep well.Helicoid hydraulic motor and drill bit, drill collar etc. are formed bottom hole assemblies, are positioned at the bottom of whole drill string, directly provide brokenly rock power for drill bit, can effectively improve mechanical rate of penetration, realize the directional inclination function.
Helicoid hydraulic motor mainly is made up of bypass valve, stator, rotor, universal drive shaft assembly, driving-shaft assembly etc.Wherein driving-shaft assembly is one of vitals of helicoid hydraulic motor, and its life-span has determined the helicoid hydraulic motor overall life, and driving-shaft assembly is mainly used in and transmits the pressure of the drill, moment of torsion and drilling fluid.
The prior art driving-shaft assembly mainly comprises power transmission shaft, transmission shaft shell, journal bearing, thrust bearings etc., and described power transmission shaft is supported by journal bearing and thrust bearing, and is positioned at transmission shaft shell, can rotate around axis.Wherein the journal bearing kind is divided into rubber journal bearing and carbide alloy journal bearing, and main effect is to bear radial load, set upright power transmission shaft and reached the current limiter effect; The axis body of the helicoid hydraulic motor on the drill bit of propeller shaft couplings lower drilling tool and top wherein.
In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art:
In helicoid hydraulic motor when work,, rotor is done planetary motion in the stator die cavity, and upper screw drilling tool axis body and power transmission shaft shape have a certain degree, so power transmission shaft bears the lateral force that the upper screw drilling tool axis body be made up of rotor axial power component etc. applies.In drill bit when work, be subjected to the influence of formation reaction, and oscillation crosswise will take place drill bit, and power transmission shaft also bears the lateral force that the drill bit of bottom applies.Because power transmission shaft will bear the lateral force that upper screw drilling tool axis body and bottom drill bit apply simultaneously, therefore, has influence on safe and reliable effective operation of driving-shaft assembly.
In order to protect power transmission shaft; helicoid hydraulic motor respectively designs one group of journal bearing in the upper and lower of power transmission shaft usually; but common journal bearing contact area is less; contact stress is bigger; abrasion resistance is relatively poor, and the life-span is shorter, for improving abrasion resistance; many at present employing carbide alloy journal bearings, but cost is higher.
Summary of the invention
In order to solve prior art problems, the utility model embodiment provides a kind of screw drill transmission shaft assembly.Can increase the contact area of journal bearing and power transmission shaft, reduce contact stress, improve the life-span of journal bearing, easy to use, safe and reliable, economical and practical.Described technical scheme is as follows:
A kind of screw drill transmission shaft assembly, comprise: journal bearing on journal bearing, power transmission shaft upper shell, upper shell lower radial bearing and the upper shell on power transmission shaft, power transmission shaft lower house, lower house lower radial bearing, thrust bearings, the lower house is provided with journal bearing on journal bearing on described lower house lower radial bearing, the described lower house, described upper shell lower radial bearing and the described upper shell from bottom to top in turn on the described power transmission shaft.
Particularly, described power transmission shaft is a multidiameter, and the big end of described power transmission shaft and the mid portion of small end are made up of the first ladder section, the second ladder section and the 3rd ladder section, and is arranged in described power transmission shaft lower house and the described power transmission shaft upper shell inner chamber.
Particularly, described power transmission shaft lower house and described power transmission shaft upper shell bottom are cylinder and isometrical, top is cone, described power transmission shaft upper shell inner chamber bottom is a conical bore, cone thread connection with described power transmission shaft lower house top, the part of the described first ladder section and the second ladder section is positioned at the power transmission shaft lower house, and another part of described the 3rd ladder section and the second ladder section is positioned at the power transmission shaft upper shell.
Particularly, the first ladder section outer wall of described power transmission shaft is provided with described lower house lower radial bearing, the lower inner wall stationary fit of the outer ring of described lower house lower radial bearing and described power transmission shaft lower house; On the described second ladder pars infrasegmentalis outer wall described thrust bearings is installed, the middle part inwall stationary fit of the outer ring of described thrust bearings and described power transmission shaft lower house, the middle and upper part outer wall of the described second ladder section is provided with journal bearing on the described lower house, the upper inside wall stationary fit of the outer ring of journal bearing and described power transmission shaft lower house on the described lower house; Described upper shell lower radial bearing is installed on the bottom outer wall of described the 3rd ladder section, and external wall of upper portion is provided with journal bearing on the described upper shell, the upper inside wall stationary fit of the outer ring of journal bearing and described power transmission shaft upper shell on the described upper shell.
Particularly, described upper shell lower radial bearing comprises lower radial bearing moving-coil, moving-coil wearing layer, lower radial bearing Jing Quan and quiet circle wearing layer at least, described lower radial bearing moving-coil is the drill holder barrel structure, the top threaded engagement of its underpart endoporus and the described second ladder section, bag is coated with described moving-coil wearing layer on its external wall of upper portion; The inwall stationary fit of described its outer wall of lower radial bearing Jing Quan and described power transmission shaft upper shell, bag is coated with described quiet circle wearing layer on its inwall.
Further, described moving-coil wearing layer and described quiet circle wearing layer material are tungsten carbide.
Compared to existing technology, the beneficial effect that brings of the technical scheme that provides of the utility model embodiment is:
The utility model embodiment has carried out the differentiation design to the abrasion resistance of the journal bearing of driving-shaft assembly, by being provided with on the power transmission shaft, in, following three groups of common journal bearings and one group of bag are coated with the journal bearing of wearing layer, increased the contact area of journal bearing and power transmission shaft, reduced contact stress, improved the life-span of journal bearing, especially it is slightly high to be worth lower common journal bearing contact stress, to reach application life in advance, improved the life-span that is worth the bag plating journal bearing good than high-wearing feature, bag plating journal bearing abrasion resistance is the several times of other three groups of common journal bearings.And transmission shaft shell is designed to two detachable housings, makes the lower common journal bearing of value be convenient to safeguard that dismounting and change need not adopt the carbide alloy journal bearing, effectively reduces the manufacturing cost of driving-shaft assembly.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the screw drill transmission shaft assembly structure schematic diagram that the utility model embodiment provides.
Each symbolic representation implication is as follows among the figure:
1 power transmission shaft, the 1-1 first ladder section, the 1-2 second ladder section, 1-3 the 3rd ladder section;
2 power transmission shaft lower houses, 3 lower house lower radial bearings, 4 thrust bearings, journal bearing on 5 lower houses, 6 power transmission shaft upper shells;
7 upper shell lower radial bearings, 7-1 lower radial bearing moving-coil, 7-2 moving-coil wearing layer, 7-3 lower radial bearing Jing Quan, the quiet circle wearing layer of 7-4;
Journal bearing on 8 upper shells.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model embodiment is described in further detail below in conjunction with accompanying drawing.
Referring to shown in Figure 1, the utility model embodiment provides a kind of screw drill transmission shaft assembly, by four groups of journal bearings are set on power transmission shaft, increased the contact area of journal bearing and power transmission shaft, reduced contact stress, improved the life-span of journal bearing, for helicoid hydraulic motor provides a kind of easy to use, safe and reliable economical driving-shaft assembly in conventional drilling and deep-well, ultradeep well operation.Described driving-shaft assembly mainly comprises: component such as journal bearing 8 on journal bearing 5, power transmission shaft upper shell 6, upper shell lower radial bearing 7, the upper shell on power transmission shaft 1, power transmission shaft lower house 2, lower house lower radial bearing 3, thrust bearings 4, the lower house; Be provided with journal bearing 8 on journal bearing 5 on lower house lower radial bearing 3, the lower house, upper shell lower radial bearing 7 and the upper shell on the described power transmission shaft 1 from bottom to top in turn.
Particularly, as preferably, described power transmission shaft 1 is the multidiameter that reduces gradually of external diameter from bottom to top, the big end in its underpart is used to connect drill bit, the top small end is used to connect the axis body of helicoid hydraulic motor, the big end of described power transmission shaft 1 and the mid portion of small end are made up of the first ladder section 1-1, the second ladder section 1-2, the 3rd ladder section 1-3, and are arranged in the power transmission shaft lower house 2 and power transmission shaft upper shell 6 inner chambers of tube-in-tube structure; Described power transmission shaft lower house 2 and described power transmission shaft upper shell 6 bottoms are cylinder and isometrical, top is cone, described power transmission shaft upper shell 6 inner chamber bottoms are conical bore, cone thread connection with described power transmission shaft lower house 2 tops, coupling part is positioned at the position, middle and upper part of the second ladder section 1-2, constitute thus and comprise described power transmission shaft lower house 2 and the common transmission shaft shell that cooperates of described power transmission shaft upper shell 6 two parts, simultaneously, the described first ladder section 1-1, the part of the second ladder section 1-2 is positioned at power transmission shaft lower house 2, described the 3rd ladder section 1-3, another part of the second ladder section 1-2 is positioned at power transmission shaft upper shell 6, this threaded engagement is convenient to the dismounting and change journal bearing.
Particularly, as preferably, the first ladder section 1-1 outer wall of described power transmission shaft 1 is provided with lower house lower radial bearing 3, the lower inner wall stationary fit of the outer ring of described lower house lower radial bearing 3 and described power transmission shaft lower house 2; On the described second ladder section 1-2 bottom outer wall thrust bearings 4 is installed, the middle part inwall stationary fit of the outer ring of described thrust bearings 4 and described power transmission shaft lower house 2, the middle and upper part outer wall of the described second ladder section 1-2 is provided with journal bearing 5 on the lower house, the upper inside wall stationary fit of the outer ring of journal bearing 5 and described power transmission shaft lower house 2 on the described lower house; On the bottom outer wall of described the 3rd ladder section 1-3 upper shell lower radial bearing 7 is installed, external wall of upper portion is provided with journal bearing 8 on the upper shell, the upper inside wall stationary fit of the outer ring of journal bearing 8 and described power transmission shaft upper shell 6 on the described upper shell; On described lower house lower radial bearing 3, thrust bearings 4, the lower house on journal bearing 5 and the upper shell journal bearing 8 be prior art, the buyable finished product.
Further, described upper shell lower radial bearing 7 comprises lower radial bearing moving-coil 7-1, moving-coil wearing layer 7-2, the quiet circle of lower radial bearing 7-3, quiet circle wearing layer 7-4 etc. at least; Described lower radial bearing moving-coil 7-1 is the drill holder barrel structure, the top threaded engagement of its underpart endoporus and the described second ladder section 1-2, and bag is coated with described moving-coil wearing layer 7-2 on its external wall of upper portion; The outer wall of the quiet circle of described lower radial bearing 7-3 and the inwall stationary fit of described power transmission shaft upper shell 6, bag is coated with described quiet circle wearing layer 7-4 on the inwall of the quiet circle of described lower radial bearing 7-3, constitute upper shell lower radial bearing 7 thus, it is a core component of realizing economical driving-shaft assembly structure; Described moving-coil wearing layer 7-2 and described quiet circle wearing layer 7-4 material are tungsten carbide.
The operating principle of the utility model embodiment: by 8 four groups of journal bearings of journal bearing on journal bearing 5, upper shell lower radial bearing 7, upper shell on the lower house lower radial bearing 3 that is provided with on the power transmission shaft 1, the lower house, make total contact area of journal bearing and power transmission shaft 1 be far longer than the contact area that has common screw drilling tool journal bearing now, and be used to contact the increase of pivot distance, greatly reduce contact stress, make the driving-shaft assembly overall operation stable, safe and reliable, obtain application life to improve.
And, in four groups of journal bearings, the abrasion resistance of the moving-coil wearing layer 7-2 of described upper shell lower radial bearing 7 and quiet circle wearing layer 7-4 is the several times of other three groups of journal bearings, when helicoid hydraulic motor is worked, the mass loss of other three groups of journal bearing unit interval is higher than described upper shell lower radial bearing 7, therefore under situation about improving overall application life, on other three groups of lower house lower radial bearings 3, the lower house on journal bearing 5, the upper shell journal bearing 8 reach application life in advance, thereby protected the high upper shell lower radial bearing 7 of use value; For conventional drilling and deep-well, ultradeep well operation provide driving-shaft assembly a kind of easy to use, safe and reliable, economical and practical.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. screw drill transmission shaft assembly, comprise: journal bearing (8) on journal bearing (5), power transmission shaft upper shell (6), upper shell lower radial bearing (7) and the upper shell on power transmission shaft (1), power transmission shaft lower house (2), lower house lower radial bearing (3), thrust bearings (4), the lower house, it is characterized in that, be provided with journal bearing (8) on journal bearing (5) on described lower house lower radial bearing (3), the described lower house, described upper shell lower radial bearing (7) and the described upper shell on the described power transmission shaft (1) from bottom to top in turn.
2. screw drill transmission shaft assembly according to claim 1, it is characterized in that, described power transmission shaft (1) is a multidiameter, the big end of described power transmission shaft (1) and the mid portion of small end are made up of the first ladder section (1-1), the second ladder section (1-2) and the 3rd ladder section (1-3), and are arranged in described power transmission shaft lower house (2) and described power transmission shaft upper shell (6) inner chamber.
3. screw drill transmission shaft assembly according to claim 2, it is characterized in that, described power transmission shaft lower house (2) and described power transmission shaft upper shell (6) bottom are cylinder and isometrical, top is cone, described power transmission shaft upper shell (6) inner chamber bottom is a conical bore, cone thread connection with described power transmission shaft lower house (2) top, the part of the described first ladder section (1-1) and the second ladder section (1-2) is positioned at power transmission shaft lower house (2), and another part of described the 3rd ladder section (1-3) and the second ladder section (1-2) is positioned at power transmission shaft upper shell (6).
4. screw drill transmission shaft assembly according to claim 3, it is characterized in that, first ladder section (1-1) outer wall of described power transmission shaft (1) is provided with described lower house lower radial bearing (3), the lower inner wall stationary fit of the outer ring of described lower house lower radial bearing (3) and described power transmission shaft lower house (2); On described second ladder section (1-2) the bottom outer wall described thrust bearings (4) is installed, the middle part inwall stationary fit of the outer ring of described thrust bearings (4) and described power transmission shaft lower house (2), the middle and upper part outer wall of the described second ladder section (1-2) is provided with journal bearing on the described lower house (5), the upper inside wall stationary fit of the outer ring of journal bearing on the described lower house (5) and described power transmission shaft lower house (2); Described upper shell lower radial bearing (7) is installed on the bottom outer wall of described the 3rd ladder section (1-3), external wall of upper portion is provided with journal bearing on the described upper shell (8), the upper inside wall stationary fit of the outer ring of journal bearing on the described upper shell (8) and described power transmission shaft upper shell (6).
5. screw drill transmission shaft assembly according to claim 4, it is characterized in that, described upper shell lower radial bearing (7) comprises lower radial bearing moving-coil (7-1), moving-coil wearing layer (7-2), lower radial bearing Jing Quan (7-3) and quiet circle wearing layer (7-4) at least, described lower radial bearing moving-coil (7-1) is the drill holder barrel structure, the top threaded engagement of its underpart endoporus and the described second ladder section (1-2), bag is coated with described moving-coil wearing layer (7-2) on its external wall of upper portion; The inwall stationary fit of its outer wall of described lower radial bearing Jing Quan (7-3) and described power transmission shaft upper shell (6), bag is coated with described quiet circle wearing layer (7-4) on its inwall.
6. screw drill transmission shaft assembly according to claim 5 is characterized in that, described moving-coil wearing layer (7-2) and described quiet circle wearing layer (7-4) material are tungsten carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726969 CN203097709U (en) | 2012-12-25 | 2012-12-25 | Screw drill drive shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726969 CN203097709U (en) | 2012-12-25 | 2012-12-25 | Screw drill drive shaft assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203097709U true CN203097709U (en) | 2013-07-31 |
Family
ID=48849119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220726969 Expired - Fee Related CN203097709U (en) | 2012-12-25 | 2012-12-25 | Screw drill drive shaft assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203097709U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899243A (en) * | 2012-12-25 | 2014-07-02 | 中国石油天然气集团公司 | Transmission shaft assembly of screw rod drilling tool |
| CN106402147A (en) * | 2016-10-13 | 2017-02-15 | 潍坊市宇宏石油机械有限公司 | Novel TC bearing combination for screw drill and production technology of TC bearing rings of TC bearing combination |
| CN107429550A (en) * | 2015-05-08 | 2017-12-01 | 哈里伯顿能源服务公司 | Drilling equipment with integrated bearing housing |
| CN116696228A (en) * | 2023-08-04 | 2023-09-05 | 四川深远石油钻井工具股份有限公司 | Screw drilling tool with self-adjusting output torque |
-
2012
- 2012-12-25 CN CN 201220726969 patent/CN203097709U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899243A (en) * | 2012-12-25 | 2014-07-02 | 中国石油天然气集团公司 | Transmission shaft assembly of screw rod drilling tool |
| CN103899243B (en) * | 2012-12-25 | 2016-03-09 | 中国石油天然气集团公司 | A kind of screw drill transmission shaft assembly |
| CN107429550A (en) * | 2015-05-08 | 2017-12-01 | 哈里伯顿能源服务公司 | Drilling equipment with integrated bearing housing |
| US10472890B2 (en) | 2015-05-08 | 2019-11-12 | Halliburton Energy Services, Inc. | Drilling apparatus with a unitary bearing housing |
| CN106402147A (en) * | 2016-10-13 | 2017-02-15 | 潍坊市宇宏石油机械有限公司 | Novel TC bearing combination for screw drill and production technology of TC bearing rings of TC bearing combination |
| CN116696228A (en) * | 2023-08-04 | 2023-09-05 | 四川深远石油钻井工具股份有限公司 | Screw drilling tool with self-adjusting output torque |
| CN116696228B (en) * | 2023-08-04 | 2023-11-28 | 四川深远石油钻井工具股份有限公司 | Screw drilling tool with self-adjusting output torque |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20211225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |