CN1661196A - Screwdrill of synergic action - Google Patents
Screwdrill of synergic action Download PDFInfo
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- CN1661196A CN1661196A CN 200410007581 CN200410007581A CN1661196A CN 1661196 A CN1661196 A CN 1661196A CN 200410007581 CN200410007581 CN 200410007581 CN 200410007581 A CN200410007581 A CN 200410007581A CN 1661196 A CN1661196 A CN 1661196A
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- bearing
- roll sleeve
- transmission shaft
- power transmission
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Abstract
A synergic screw drilling tool is featured as using the rolling bearing to replace sliding bearing, adding shock absorption mechanism at bottom end of shaft and utilizing compensatory water face seal to realize media purification and quantitative streaming for lubricating system and cooling system in order to improve force bearing condition as well as to reduce abrasion speed and friction consumption of the screw drilling tool.
Description
Affiliated technical field:
The present invention is a kind of mud motor that is used for geological prospecting, oil exploitation.It is the indispensable instrument of non-straight well construction.The compound drilling technology of extensively carrying out at present there is stronger compliance.
Background technology:
At present, the basic structure of known helicoid hydraulic motor designed in the past at the compound drilling technology of implementation.The basic structure of its power transmission shaft part is: sliding bearing (going up the TC bearing)+ball bearing group+sliding bearing (following TC bearing).Use drilling fluid directly to shunt cooling with lubricated, its shunt volume increases with the increase of bearing clearance.There are three big defectives in the helicoid hydraulic motor of said structure: the one, and TC bearing drag and friction power loss are big; The 2nd, power transmission shaft directly is connected with drill bit, and the Zhuan Dong Inertia amount of hydro powered part is less than normal, and impact load is big; The 3rd, drilling fluid directly cools off with lubricated effect bad, and the bearing erosion rate is fast, the bit operating mode instability.In compound creeping into, rotating speed, power and stress condition have all exceeded design, when the urceolus of single bended screwdrill rotates to camber and well curvature rightabout, power transmission shaft is subjected to the acting in conjunction of six kinds of strength such as the Mechanical Driven power of hydro powered power, rotating disk of anti-torsion, the motor of lateral pressure, force of sliding friction, the drill bit of TC bearing and dynamic load impact force simultaneously, is the dangerous spot of helicoid hydraulic motor.In modern drilling engineering, the compound drilling time of helicoid hydraulic motor has accounted for four to eighty per cant of total service time, and the application life of helicoid hydraulic motor and time between overhauls(TBO) are too short, operating cost height, the needs of the compound drilling technology of incompatibility.
Summary of the invention:
Purpose of the present invention provides a kind of long-life helicoid hydraulic motor for geological prospecting, oil exploitation exactly.It has stronger compliance to the compound drilling technology of extensively carrying out at present.
The technical solution adopted in the present invention is: the bearing combination of screw drill transmission shaft part is changed into: roll sleeve bearing+ball bearing group+roll sleeve bearing, and set up damping in the power transmission shaft lower end and adopt the dynamic seal water system of compensation end face to realize cooling and the dense medium purifica tion of lubricating system and quantitatively shunting.
The operating mode of roll sleeve bearing is based on roll mode, and the stress condition and the friction condition of bearing improve, and helicoid hydraulic motor is when crossing dangerous spot, and the probability of generation part damage reduces.
Beneficial effect of the present invention has 6 points: (1) is that the stress condition of bearing improves after adopting roll sleeve bearing and damping, and the probability that helicoid hydraulic motor damages in advance because of overload reduces; (2) be that roll sleeve bearing friction is low in energy consumption, the effective power of drill bit increases; (3) be that compensation end face seal water system makes the catharsis in shaft bottom and hydraulic drilling effect keep stable; (4) be that compensation end face seal water system can reduce the solid concentration that enters bearing bore, reduce the erosion rate of bearing; (5) be that the load of motor and universal joint reduced after the friction power loss of bearing reduced, the prolongation of receiving a mandate, operating cost descends; (6) be that shock mitigation system increases the Zhuan Dong Inertia amount of hydro powered part, the amplitude of helicoid hydraulic motor shock loading descends.
The helicoid hydraulic motor of realizing above-mentioned purpose can be single curved, straight and variable camber.
Novel structure of the present invention, the special-less process requirement.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing and design scheme.
Fig. 1 is the surface structure schematic diagram that the present invention implements on the single bended screwdrill of φ 172mm5.5 level general on the oilfield.
Fig. 2 be synergy screw drill transmission shaft assembly partly cut open the structural representation view.
Fig. 3 be synergy helicoid hydraulic motor vibration damper assembly partly cut open structural representation.
Among Fig. 1,1. being by-pass valve assemblies, 2. is motor assemblies, 3. is universal drive shaft assemblies, 4. is driving-shaft assemblies, the 5th, and vibration damper assembly.
Among Fig. 2,3. being water caps, 4. is round section joint rings, 5. is springs, 6. being the universal drive shaft urceolus, 7. is water seal covers, 8. is wear rings, 9. be locking cap, 10., the 29.th, nylon cushion, the 11., the 16.th, outer roll sleeve, 12. be the power transmission shaft urceolus, the 13.th, bearing group, the 14., 15., 18., the 21.th, ball, 17., the 23., 24., the 28.th, bearing (ball) cover, the 19., the 27.th, middle roll sleeve, the 20., the 26.th, interior roll sleeve, 22. be the top cover, the 25.th, anti-lost nut, the 30.th, power transmission shaft.
Among Fig. 3,1. being power transmission shafts, is sealing rings 2., 10., 3. is loam cakes, 4. is round section joint rings, 5. is splines, 6. is plugs, 7. is urceolus, 8. is elastic bellows, 9. is adjustable rings.
The specific embodiment:
Among Fig. 1, (4) be the most complicated part of helicoid hydraulic motor structure, its condition of work is abominable, is bearing multiple loads such as the pressure of the drill, moment of torsion, fretting corrosion, waterpower erosion, frictional force, vibration force and lateral bending pressure, and its component life is determining the time between overhauls(TBO) of helicoid hydraulic motor.
Among Fig. 2, the left end of power transmission shaft (30) is connected with water cap (3) by screw thread.Be stationary fit between the inner ring of bearing group (13) and the power transmission shaft (30), be stationary fit between the power transmission shaft urceolus (12) of its outer ring and band centralizer.Locking cap (9) links to each other with power transmission shaft (30) screw thread and the inner ring of bearing group is locked in the middle part of power transmission shaft (30) by interior roll sleeve (20), top cover (22), anti-lost nut (25).Passing to interior roll sleeve (20), anti-lost nut (25), bearing group inner ring, outer ring from the axial counter-force of drill bit successively from the right-hand member of power transmission shaft (30) finally arrives on the power transmission shaft urceolus (12).In cooperate for rolling between inner ring surface and the power transmission shaft (30) of roll sleeve (19), (27), its outer ring surface then cooperates with the inner ring surface rolling of outer roll sleeve (11), (16) respectively.Middle roll sleeve (19), (27) both sides contact with rollings such as bearing (ball) cover (17), (23), (24), (28) respectively with (15) by ball (18), (21), (14) respectively.Outer roll sleeve (11), (16) are fixed on the power transmission shaft urceolus (12) by screw thread.Gap and the appropriate axial wearing and tearing that compensate the roll sleeve bearing between bearing (ball) cover and ball can be regulated in nylon cushion (10), (29).Like this, interior roll sleeve (20), (26) by the roll sleeve bearing just from the radial load of drill bit, middle roll sleeve (19), (27), outer roll sleeve (11), (16) are finally passed on the urceolus (12).When power transmission shaft (30) rotated, middle roll sleeve (19), (27) were based on the rolling working method, and its friction power consumption significantly reduces, and erosion rate slows down.
In compound creeping into, the helicoid hydraulic motor urceolus is forced rotation under rotating disk drives, and when crooked position was crossed dangerous spot, because force of rolling friction is little, dynamic load factor was low, and the load of axle, bearing, universal joint reduces, and the probability of damaging because of overload reduces, and the life-span prolongs.
The rolling contact surface of roll sleeve bearing has wearing layer or antifriction alloy to insert.
Among Fig. 2, quantitatively separate system is made up of water cap (3), water seal cover (7), wear ring (8) and locking cap (9).Metering hole (2) is arranged on the water cap (3).The duct of metering hole is taper and wear-resistant coating is arranged, the axis normal of the axially bored line of metering hole and main flow duct (1).This structure can be effectively anti-blocking and be utilized principle of inertia, separates the part solid phase in the cooling fluid.The small end aperture of metering hole (2) calculates according to design diverting coefficient (7%～15%).Realize static sealing by round section joint ring (4) between the left end of water seal cover (7) and the water cap (3).Wear ring (8) is fixed on the outer roll sleeve (11) by screw thread, be dynamic seal (packing) between the right-hand member of water seal cover (7) and the wear ring (8), be matched in clearance between the left end draw runner of its endoporus and locking cap (9), draw runner makes water seal cover (7) and locking cap (9) rotation synchronously, water seal cover (7) can prolong the draw runner move left and right simultaneously, and passes through the wearing and tearing of spring (5) real-Time Compensation right side.
Quantitatively the shunting waterpower and the flow of drill bit that guaranteed to flow through makes the catharsis in shaft bottom and hydraulic drilling effect keep stable.
In compound the creeping into, rotating disk drives the fact that may cover drive shafts fracture.Caused the power transmission shaft well that falls for locking cap (9) behind the prevention off-axis loses efficacy in succession, anti-lost nut is fixing by screw thread and power transmission shaft (30), and the realization secondary insures.
Among Fig. 3, loam cake (3) is connected with urceolus (7) by screw thread, realizes static seal by round section joint ring (4), there is spline the right-hand member inboard of loam cake (3), spline (5) is an one with power transmission shaft (1), and cooperates with the spline of loam cake (3), can add the notes butter by plug (6) in spline.By sealing ring (2) sealing, sealing ring (10) sealing is arranged between the right-hand member of power transmission shaft (1) and the urceolus between the left end inboard of loam cake (3) and the power transmission shaft (1).Elastic bellows (8) is enclosed within on the power transmission shaft (1), by adjustable ring (9) the axial pretightening pressure of elastic bellows is reached about 1 ton.When urceolus bore fluctuation the pressure of the drill, elastic bellows can absorb and release energy and reach the purpose of damping, and the spline on the power transmission shaft slides in spline, and moment of torsion reaches drill bit by spline (5), loam cake (3), urceolus (7).
Elastic bellows is processed by spring steel, and rigidity is bigger, and under the effect of 10 tons of the pressure of the drill, axial compression amount is no more than 3MM.
Claims (5)
1. helicoid hydraulic motor, its transmission shaft bearing built-up sequence is: roll sleeve bearing+ball bearing group+roll sleeve bearing.Its power transmission shaft upper end has the dynamic seal water system of end face, and the lower end has shock mitigation system.
2. structure according to claim 1 is characterized in that: the roll sleeve bearing is made up of interior roll sleeve, middle roll sleeve, outer roll sleeve, ball and bearing (ball) cover.
3. structure according to claim 1, the core damper element of its shock mitigation system is an elastic bellows.
4. structure according to claim 1 is characterized in that: end face seal water system metering hole limited flow rate, the axis in shunting duct is vertical with the main flow axially bored line, utilizes the inertial separation solid phase.
5. structure according to claim 1, helicoid hydraulic motor can be single curved, straight and variable camber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410007581 CN1661196A (en) | 2004-02-26 | 2004-02-26 | Screwdrill of synergic action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410007581 CN1661196A (en) | 2004-02-26 | 2004-02-26 | Screwdrill of synergic action |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1661196A true CN1661196A (en) | 2005-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410007581 Pending CN1661196A (en) | 2004-02-26 | 2004-02-26 | Screwdrill of synergic action |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1661196A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763322A (en) * | 2015-03-31 | 2015-07-08 | 青岛江汉石油机械有限公司 | Four-loosening-preventing and two-falling-preventing type power output shaft of screw drill |
-
2004
- 2004-02-26 CN CN 200410007581 patent/CN1661196A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763322A (en) * | 2015-03-31 | 2015-07-08 | 青岛江汉石油机械有限公司 | Four-loosening-preventing and two-falling-preventing type power output shaft of screw drill |
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| WD01 | Invention patent application deemed withdrawn after publication |