CN104278948B - A kind of screw drill transmission shaft assembly - Google Patents
A kind of screw drill transmission shaft assembly Download PDFInfo
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- CN104278948B CN104278948B CN201410504623.2A CN201410504623A CN104278948B CN 104278948 B CN104278948 B CN 104278948B CN 201410504623 A CN201410504623 A CN 201410504623A CN 104278948 B CN104278948 B CN 104278948B
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- mandrel
- piston
- shell
- wall
- oil
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 82
- 239000002131 composite material Substances 0.000 claims abstract description 40
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 115
- 238000005553 drilling Methods 0.000 description 18
- 230000006378 damage Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- E21B4/00—Drives for drilling, used in the borehole
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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
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/003—Bearing, sealing, lubricating details
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of screw drill transmission shaft assembly, mandrel center is provided with mandrel hydrophthalmia, mandrel periphery is set with successively from top to bottom and is connected with upper sleeve gasket, body, shell and cylinder sleeve, the inwall of upper sleeve gasket and the outer wall of mandrel are sealed by upper sealing device, forming upper oil cavitie between upper sealing device and body upper surface, body epimere is provided with body oiling passage and communicates with upper oil cavitie and external port is closed by body oiling plug；Body epimere inwall is supported on mandrel periphery by body self-lubricating composite bearing, and body hypomere inwall is connected with mandrel outer wall by drop preventing mechanism, and drop preventing mechanism is immersed in oil pocket, and body peripheral is connected with replaceable centralizer；Outer casing inner wall is supported on mandrel periphery by shell self-lubricating composite bearing；Inboard wall of cylinder liner and mandrel outer wall are sealed by lower sealing device, are provided with lower oil cavitie between lower sealing device and shell lower end, and cylinder sleeve is provided with lower oiling plug and communicates with lower oil cavitie.
Description
Technical field
The present invention relates to a kind of screw drill transmission shaft assembly, moment of torsion and rotating speed for producing provide power for drill bit, belong to oil-well drilling equipment technical field.
Background technology
In oil drilling, utilizing moment of torsion that helicoid hydraulic motor produces and rotating speed is that drill bit provides required power, creeps into thus carrying out brokenly rock.Helicoid hydraulic motor top spins drilling tool, and bottom spins drill bit.Owing to helicoid hydraulic motor is close to drill bit so that the brill that holds of the directional well of extended reach well, multihole well, Multilateral Wells etc. is possibly realized.
Helicoid hydraulic motor is the energy conversion device that the pressure of a kind of liquid can be converted to mechanical energy.When highly pressurised liquid enters drilling tool, force rotor to roll in the stator, thus produce moment of torsion and rotating speed, be delivered to driving-shaft assembly by universal drive shaft, driving-shaft assembly transmit moment of torsion and rotating speed to provide power for drill bit, reach the purpose of drilling well.
Helicoid hydraulic motor technology conventional at present is open type common screw drilling tool technology, there is identical structure, use the phenomenon that temperature is low, use scope is little, service life is short, cannot be carried out the operation of Short Radius Horizontal Wells, also do not realize accelerating the current demand that bit speed promotes, drilling period shortens, drilling cost reduces.
Open type screw drill transmission shaft assembly is mainly made up of mandrel, lower TC bearing fixing sleeve, lower TC bearing rotary set, body, drop preventing mechanism, spring, lower positioning sleeve, cutting ferrule, string bearing, upper positioning sleeve, upper TC bearing fixing sleeve and upper TC bearing rotary set etc..
In drilling well, the mud pumped into from slush pump enters driving-shaft assembly by drilling tool water hole, leads up to mandrel hydrophthalmia, and after entering bit nozzle directive shaft bottom, cutting carring returns to ground；Separately leading up to the gap of upper TC bearing fixing sleeve and upper TC bearing rotary inner room flows to string bearing, is flowing to the annular space outside drilling tool by the gap of lower TC bearing fixing sleeve, lower TC bearing rotary inner room.Whole TC bearing and string bearing are all open in mud, owing to mud containing the chemical attack of many small rock particles and mud, greatly reduce the service life of bearing, its service life is at 100 hours, use temperature below 100 degree, also cannot support the use with MWd, LWd, rotary steering drilling system.
Lower TC bearing fixing sleeve on this screw drill transmission shaft assembly, lower TC bearing rotary set, upper TC bearing fixing sleeve, upper TC bearing rotary set carry righting function radially, many group string bearings are serially connected, and mainly carry axial load and the righting load of part.Centralizer is connected as a single entity with body, and a load centralizer abrasion, this helicoid hydraulic motor just lost efficacy.
Development along with petroleum drilling technology, particularly ocean and the probing of land Desert Oil, in order to obtain better economic benefit, it is necessary to exploitation cluster well, multihole well, fish spicule well and extended horizontal well, and it is often required on more complicated stratum, such as high-dip structure band drilling well；Hold the above-mentioned Oil/gas Well highly difficult, high-caliber of brill, it is necessary to helicoid hydraulic motor is proposed higher requirement.
Summary of the invention
It is an object of the invention to, overcome problems of the prior art, it is provided that a kind of screw drill transmission shaft assembly, it is possible to stop mud to enter in the chuck outside mandrel, make the bearing of drop preventing mechanism be enclosed in lubricant reservoir and work, long service life.
For solving above technical problem, a kind of screw drill transmission shaft assembly of the present invention, including mandrel, the mandrel hydrophthalmia being provided with through centrally along axis of described mandrel, the upper end of described mandrel is provided with the male thread being connected with universal drive shaft, the lower end of described mandrel is provided with the box thread being connected with drill bit, the periphery of described mandrel is set with upper sleeve gasket from top to bottom successively, body, shell and cylinder sleeve, the upper end of described upper sleeve gasket is provided with the male thread being connected with universal shaft housing, the upper end of the lower end of described upper sleeve gasket and described body spins mutually, the upper end of the lower end of described body and described shell spins mutually, the upper end of the bottom of described shell and described cylinder sleeve spins mutually；The outer wall of the inwall of described upper sleeve gasket and described mandrel realizes sealing by upper sealing device, upper oil cavitie is formed between the upper surface of described upper sealing device and described body, the epimere of described body is provided with body oiling passage and communicates with described upper oil cavitie, and the external port of described body oiling passage is closed by body oiling plug；The epimere inwall of described body is supported on described mandrel periphery by body self-lubricating composite bearing, the hypomere inwall of described body is connected with the outer wall of described mandrel by drop preventing mechanism, described drop preventing mechanism is immersed in oil pocket, and the periphery of described body is connected with replaceable centralizer；The inwall of described shell is supported on described mandrel periphery by shell self-lubricating composite bearing；The outer wall of the inwall of described cylinder sleeve and described mandrel realizes sealing by lower sealing device, is provided with lower oil cavitie between the lower end of described lower sealing device and described shell, and described cylinder sleeve is provided with lower oiling plug and communicates with described lower oil cavitie.
Relative to prior art, the present invention achieves following beneficial effect: in drilling well, and mud can fully enter mandrel hydrophthalmia, enters cutting carring behind bit nozzle directive shaft bottom by mandrel hydrophthalmia and returns to ground, mandrel rotates and each set of periphery does not turn；Mandrel periphery upper sleeve gasket, body, shell and cylinder sleeve spin successively and realize sealing.The inwall of upper sleeve gasket realizes sealing by upper sealing device with the outer wall of mandrel, upper oil cavitie is formed between upper sealing device and the upper surface of body, in upper oil cavitie, fill pressure oil from body oiling passage, then with body oiling plug, the outlet of body oiling passage is blocked；Mud is blocked above upper sealing device by the pressure oil of upper oil cavitie and upper sealing device.Drop preventing mechanism is immersed in oil pocket, works under lubrication circumstances, not with mud contacts；The periphery of body is connected with replaceable centralizer, it is to avoid centralizer damages and causes that whole driving-shaft assembly is scrapped.Long latus rectum shell self-lubricating composite bearing can reduce mandrel rotational resistance in shell, and can play the effect of righting.The inwall of cylinder sleeve realizes sealing by lower sealing device with the outer wall of mandrel, lower oil cavitie it is provided with between lower sealing device and the lower end of shell, after filling pressure oil in lower oil cavitie, adopt lower oiling plug closure, pressure oil in lower sealing device and lower oil cavitie makes mud can not be upwardly in the annular slot of cylinder sleeve, the each parts that ensure that in the chuck of top do not contact mud, extend service life.
As the improvement of the present invention, the middle part of described shell is provided with shell oiling passage, and described shell oiling passage communicates with described shell self-lubricating composite bearing, and the external port closure of described shell oiling passage has shell oiling plug.Can to shell self-lubricating composite bearing oiling by shell oiling passage, it is ensured that its lubrication is good.
As the improvement of the present invention, described upper sealing device includes upper piston, and the upper inside wall of described upper piston is provided with scrapes circle, is provided with rotary oil seal in the middle part of the inwall of described upper piston, and the inner wall lower of described upper piston is provided with upper piston self-lubricating composite bearing；Scraping the outer wall realization sealing of circle and upper rotary oil seal and described mandrel on described, described upper piston self-lubricating composite bearing is stuck on the outer wall of described mandrel；The outer wall of described upper piston is sequentially provided with many group O and friction sleeve in the axial direction.Upper sealing device can move up and down in the annular chamber between upper sleeve gasket and mandrel；O and friction sleeve closely against the inwall of upper sleeve gasket and the outer wall of upper piston, prevent upper sealing device to rotate with mandrel；Upper piston self-lubricating composite bearing can reduce the rotational resistance of mandrel and play the effect of righting, and the lubricating oil of upper piston inwall can not be crossed rotary oil seal and flow up；On scrape circle bigger landwaste can be stoped descending, it is prevented that landwaste damages upper rotary oil seal.
As the improvement of the present invention, the bottom of described upper piston is provided with upper piston oil duct, and the lower end of described upper piston oil duct communicates with described upper oil cavitie；The upper end of described upper piston oil duct inwardly leads to the outlet of each interior oilhole, the upper end of described upper piston oil duct outwards leads to the outlet of each outer oilhole respectively, and described interior oilhole is on described between rotary oil seal and described upper piston self-lubricating composite bearing and be circumferentially uniformly distributed；Described outer oilhole lays respectively at described in each group between O and friction sleeve and is circumferentially uniformly distributed.Pressure oil in upper oil cavitie is exported to each interior oilhole and each outer oilhole by upper piston oil duct, it is achieved the lubrication to upper piston self-lubricating composite bearing, O and friction sleeve.
As the improvement of the present invention, the top of described upper piston is provided with upper piston slurry channel, and described upper piston slurry channel inwardly leads to interior mud hole exits, and described upper piston slurry channel outwards leads to outer mud hole exits；Described interior mud hole scrape circle on described and be described between rotary oil seal and be circumferentially uniformly distributed, described outer mud hole is positioned at more than the described O of top and is circumferentially uniformly distributed.Piston slurry channel makes mud that upper piston is produced downward pressure, forms balance with the oil pressure in upper oil cavitie, and when the mud pressure of top is more than the oil pressure of lower section, upper piston moves down；When the mud pressure of top is less than the oil pressure of lower section, upper piston moves up.
Improvement as the present invention, described drop preventing mechanism includes plane bearing, anti-lost fixture block, lower plane bearing and regulates ring, the top of described upper plane bearing withstands on below the interior step of described body, the lower support of described upper plane bearing is on described anti-lost fixture block, the lower support of described anti-lost fixture block is on described lower plane bearing, the lower support of described lower plane bearing is on described adjustment ring, and the lower support of described adjustment ring is in the upper port of described shell；Described anti-lost fixture block is surrounded by symmetrical two halves and forms, and the inner peripheral wall of described anti-lost fixture block is provided with the anti-lost snap ring of multiple tracks and each anti-lost snap ring is inlaid in draw-in groove corresponding on described mandrel respectively.Upper plane bearing, anti-lost fixture block, lower plane bearing and adjustment ring constitute one group of bearing system that can run well, and work under oil immersion environment, it is not easy to be damaged；Anti-lost fixture block is stuck in the draw-in groove of mandrel by the anti-lost snap ring of multiple tracks, it is achieved axially positions, and is fixed on mandrel by drop preventing mechanism.Drop preventing mechanism and mandrel are integrally forming, it is ensured that upper plane bearing and the normal operation under high axial weight on bit of the lower plane bearing.
Improvement as the present invention, the middle part of described anti-lost fixture block is fixed on described mandrel by fixture block backing-up screw, the periphery of described anti-lost fixture block is set with cutting ferrule, the lower end of described cutting ferrule is supported in the outer step of described anti-lost fixture block bottom, the lower section withstanding on check ring of described cutting ferrule, described check ring is inlaid on the circumference of described anti-lost fixture block.Anti-lost fixture block is fixed on mandrel by fixture block backing-up screw, and cutting ferrule is enclosed within the annular table terrace that anti-lost fixture block is corresponding, prevents anti-lost fixture block to disengage from mandrel, and cutting ferrule is axially positioned by check ring.
Improvement as the present invention, the excircle of described replaceable centralizer uniformly has multiple tracks righting strip respectively, the axially middle part of described replaceable centralizer spins on the body by multiple centralizer backing-up screws, and each described centralizer backing-up screw is distributed along the even circumferential of described body.Replaceable centralizer is independent sleeve structure, and righting strip thereon according to user's request, can be fabricated to three to six, it is fabricated to the rotation direction such as vertical bar, spiral bar, according to the Construction Condition of drilling well, required replaceable centralizer can be selected, greatly reduces construction cost at the scene.
As the improvement of the present invention, the lower end of described shell is connected with body seal lid, and the lower end of described body seal lid is provided with the body seal groove towards described mandrel, is embedded with shell rotary oil seal in described body seal groove.The body seal lid of the lower end of shell and shell rotary oil seal can stop the lubricating oil in lower oil cavitie up.
As the improvement of the present invention, described lower sealing device includes lower piston, and the inner wall lower of described lower piston is provided with down scrapes circle, is provided with lower rotary oil seal in the middle part of the inwall of described lower piston, and the upper inside wall of described lower piston is provided with lower piston self-lubricating composite bearing；Scraping the outer wall realization sealing of circle and lower rotary oil seal and described mandrel under described, described lower piston self-lubricating composite bearing is stuck on the outer wall of described mandrel；The outer wall top of described lower piston realizes sealing by biconvex oil sealing and described cylinder sleeve, the outer wall bottom of described lower piston is provided with the lower piston cannelure axially extended, the bottom of described cylinder sleeve is connected with alignment pin, and the afterbody cylinder table of described alignment pin inserts in described lower piston cannelure；It is filled with O in the gap above thread segment that described cylinder sleeve and described shell spin mutually.The in-house alignment pin of lower seal is tightened on cylinder sleeve, and alignment pin afterbody cylinder table inserts in lower piston cannelure, it is ensured that lower piston does not rotate with mandrel；Lower piston self-lubricating composite bearing can reduce the rotational resistance of mandrel and play the effect of righting, the outer wall top of lower piston realizes sealing by biconvex oil sealing and cylinder sleeve, the inwall of lower piston scrapes the outer wall realization sealing of circle and lower rotary oil seal and mandrel under passing through, lower rotary oil seal can stop the downward seepage of lubricating oil of top, under scrape circle and can stop the landwaste lower rotary oil seal of injury of splashing.
Improvement as the present invention, the inner side of described biconvex oil sealing is arranged with two crests, the outside corresponding with described crest is arranged with two troughs, the radius of outside protuberance and the radius of inner recess and is r, the radius of outer recess and the radius of inner projection and is R and r=0.4 ~ 0.8R.The internal diameter protuberance of biconvex oil sealing and lower piston are having the bigger magnitude of interference, it is ensured that install smoothly, simultaneously mandrel eccentric rotary, promote lower piston radially displaced time, biconvex oil sealing can seal the gap between cylinder sleeve and lower piston.
As the improvement of the present invention, the lower port circumference of described cylinder sleeve being evenly distributed with multiple cylinder sleeve mud hole, the lower ending opening in each described cylinder sleeve mud hole, the described upper end in cylinder sleeve mud hole communicates with the lower surface of described lower piston；The upper surface of described lower piston is provided with lower piston oil groove, and the upper end of described lower piston oil groove communicates with described lower oil cavitie.Cylinder sleeve mud hole on cylinder sleeve can make the mud of mineshaft annulus enter in cylinder sleeve, promotes lower piston motion, to keep the pressure balance of lower oil cavitie and mineshaft annulus mud.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation, and accompanying drawing only provides reference and use is described, is not used to the restriction present invention.
Fig. 1 is the front view of screw drill transmission shaft assembly of the present invention.
Fig. 2 is the enlarged drawing of upper sealing device in Fig. 1.
Fig. 3 is the structural representation of upper piston in Fig. 2.
Fig. 4 is the enlarged drawing of drop preventing mechanism in Fig. 1.
Fig. 5 is the front view of replaceable centralizer in Fig. 1.
Fig. 6 is the top view of Fig. 5.
Fig. 7 is the enlarged drawing of lower sealing device in Fig. 1.
Fig. 8 is the front view of cylinder sleeve in Fig. 7.
Fig. 9 is the upward view of Fig. 8.
In figure: 1. mandrel；1a. mandrel hydrophthalmia；
2. upper sleeve gasket；3. upper oil cavitie；
4. upper sealing device；4a. upper piston；4b. scrapes circle；The upper rotary oil seal of 4c.；4d. upper piston self-lubricating composite bearing；4e.O type circle；4f. friction sleeve；4g. upper piston oil duct；4h. upper piston slurry channel；
5. body；5a. body oiling passage；5b. body oiling plug；5c. body self-lubricating composite bearing；
6. drop preventing mechanism；The upper plane bearing of 6a.；The anti-lost fixture block of 6b.；6c. fixture block backing-up screw；6d. cutting ferrule；6e. check ring；6f. lower plane bearing；6g. regulates ring；
7. replaceable centralizer；7a. centralizer backing-up screw；7b. righting strip；
8. shell；8a. shell self-lubricating composite bearing；8b. shell oiling passage；8c. shell oiling plug；8d. body seal lid；8e. shell rotary oil seal；
9. cylinder sleeve；Oiling plug under 9a.；9b. cylinder sleeve mud hole；9c. alignment pin；9d.O type circle；
10. lower oil cavitie；
11. lower sealing device；11a. lower piston；11a1. lower piston cannelure；11b. under scrape circle；11c. lower rotary oil seal；11d. lower piston self-lubricating composite bearing；11e. biconvex oil sealing；11f. lower piston oil groove.
Detailed description of the invention
As shown in Figures 1 to 9, the screw drill transmission shaft assembly of the present invention includes mandrel 1, the mandrel hydrophthalmia 1a being provided with through centrally along axis of mandrel 1, the upper end of mandrel 1 is provided with the male thread being connected with universal drive shaft, the lower end of mandrel 1 is provided with the box thread being connected with drill bit, the periphery of mandrel 1 is set with upper sleeve gasket 2 from top to bottom successively, body 5, shell 8 and cylinder sleeve 9, the upper end of upper sleeve gasket 2 is provided with the male thread being connected with universal shaft housing, the upper end of the lower end of upper sleeve gasket 2 and body 5 spins mutually, the upper end of the lower end of body 5 and shell 8 spins mutually, the upper end of the bottom of shell 8 and cylinder sleeve 9 spins mutually；The outer wall of the inwall of upper sleeve gasket 2 and mandrel 1 realizes sealing by upper sealing device 4, upper oil cavitie 3 is formed between the upper surface of upper sealing device 4 and body 5, the epimere of body 5 is provided with body oiling passage 5a and communicates with upper oil cavitie 3, and the external port of body oiling passage 5a is closed by body oiling plug 5b；The epimere inwall of body 5 is supported on mandrel 1 periphery by body self-lubricating composite bearing 5c, and the hypomere inwall of body 5 is connected with the outer wall of mandrel 1 by drop preventing mechanism 6, and drop preventing mechanism 6 is immersed in oil pocket, and the periphery of body 5 is connected with replaceable centralizer 7；The inwall of shell 8 is supported on mandrel 1 periphery by shell self-lubricating composite bearing 8a；The outer wall of the inwall of cylinder sleeve 9 and mandrel 1 realizes sealing by lower sealing device 11, is provided with lower oil cavitie 10 between the lower end of lower sealing device 11 and shell 8, and cylinder sleeve 9 is provided with lower oiling plug 9a and communicates with lower oil cavitie 10.
In drilling well, mud can fully enter mandrel hydrophthalmia 1a, enters cutting carring behind bit nozzle directive shaft bottom by mandrel hydrophthalmia 1a and returns to ground, mandrel 1 rotates and each set of periphery does not turn；Mandrel 1 periphery upper sleeve gasket 2, body 5, shell 8 and cylinder sleeve 9 spin successively and realize sealing.The outer wall of the inwall of upper sleeve gasket 2 and mandrel 1 realizes sealing by upper sealing device 4, upper oil cavitie 3 is formed between the upper surface of upper sealing device 4 and body 5, in upper oil cavitie 3, fill pressure oil from body oiling passage 5a, then with body oiling plug 5b, the outlet of body oiling passage 5a is blocked；Mud is blocked above upper sealing device 4 by the pressure oil of upper oil cavitie 3 and upper sealing device 4.Drop preventing mechanism 6 is immersed in oil pocket, works under lubrication circumstances, not with mud contacts；The periphery of body 5 is connected with replaceable centralizer 7, it is to avoid centralizer damages and causes that whole driving-shaft assembly is scrapped.Long latus rectum shell self-lubricating composite bearing 8a can reduce the mandrel 1 rotational resistance in shell 8, and can play the effect of righting.The outer wall of the inwall of cylinder sleeve 9 and mandrel 1 realizes sealing by lower sealing device 11, lower oil cavitie 10 it is provided with between the lower end of lower sealing device 11 and shell 8, after filling pressure oil in lower oil cavitie 10, adopt lower oiling plug 9a closure, pressure oil in lower sealing device 11 and lower oil cavitie 10 makes mud can not be upwardly in the annular slot of cylinder sleeve 9, the each parts that ensure that in the chuck of top do not contact mud, extend service life.
The middle part of shell 8 is provided with shell oiling passage 8b, and shell oiling passage 8b communicates with shell self-lubricating composite bearing 8a, and the external port closure of shell oiling passage 8b has shell oiling plug 8c.Can to shell self-lubricating composite bearing 8a oiling by shell oiling passage 8b, it is ensured that its lubrication is good.
As shown in Figure 2 and Figure 3, upper sealing device 4 includes upper piston 4a, and the upper inside wall of upper piston 4a is provided with scrapes circle 4b, is provided with rotary oil seal 4c in the middle part of the inwall of upper piston 4a, and the inner wall lower of upper piston 4a is provided with upper piston self-lubricating composite bearing 4d；On scrape the outer wall of circle 4b and upper rotary oil seal 4c and mandrel 1 and realize sealing, upper piston self-lubricating composite bearing 4d is stuck on the outer wall of mandrel 1；The outer wall of upper piston 4a is sequentially provided with many group O 4e and friction sleeve 4f in the axial direction.Upper sealing device 4 can move up and down in the annular chamber between upper sleeve gasket 2 and mandrel 1；O 4e and friction sleeve 4f closely againsts the inwall of upper sleeve gasket 2 and the outer wall of upper piston 4a, prevents upper sealing device 4 to rotate with mandrel 1；Upper piston self-lubricating composite bearing 4d can reduce the rotational resistance of mandrel 1 and play the effect of righting, and the lubricating oil of upper piston inwall can not be crossed rotary oil seal 4c and flow up；On scrape circle 4b bigger landwaste can be stoped descending, it is prevented that landwaste damages upper rotary oil seal 4c.
The bottom of upper piston 4a is provided with upper piston oil duct 4g, and the lower end of upper piston oil duct 4g communicates with upper oil cavitie 3；The upper end of upper piston oil duct 4g inwardly leads to the outlet of each interior oilhole, and the upper end of upper piston oil duct 4g outwards leads to the outlet of each outer oilhole respectively, and interior oilhole is between upper rotary oil seal 4c and upper piston self-lubricating composite bearing 4d and is circumferentially uniformly distributed；Outer oilhole lays respectively between each group of O 4e and friction sleeve 4f and is circumferentially uniformly distributed.Pressure oil in upper oil cavitie 3 is exported to each interior oilhole and each outer oilhole by upper piston oil duct 4g, it is achieved the lubrication to upper piston self-lubricating composite bearing 4d, O 4e and friction sleeve 4f.
The top of upper piston 4a is provided with upper piston slurry channel 4h, upper piston slurry channel 4h and inwardly leads to interior mud hole exits, and upper piston slurry channel 4h outwards leads to outer mud hole exits；Interior mud hole is scraped between circle 4b and upper rotary oil seal 4c upper and be circumferentially uniformly distributed, and outer mud hole is positioned at more than the O 4e of top and is circumferentially uniformly distributed.Piston slurry channel makes mud that upper piston 4a is produced downward pressure, forms balance with the oil pressure in upper oil cavitie 3, and when the mud pressure of top is more than the oil pressure of lower section, upper piston 4a moves down；When the mud pressure of top is less than the oil pressure of lower section, upper piston 4a moves up.
As shown in Figures 4 to 6, drop preventing mechanism 6 includes plane bearing 6a, anti-lost fixture block 6b, lower plane bearing 6f and regulates ring 6g, the top of upper plane bearing 6a withstands on below the interior step of body 5, the lower support of upper plane bearing 6a is on anti-lost fixture block 6b, the lower support of anti-lost fixture block 6b is on lower plane bearing 6f, the lower support of lower plane bearing 6f is regulating on ring 6g, regulates the lower support of ring 6g in the upper port of shell 8；Anti-lost fixture block 6b is surrounded by symmetrical two halves and forms, and the inner peripheral wall of anti-lost fixture block 6b is provided with the anti-lost snap ring of multiple tracks and each anti-lost snap ring is inlaid in draw-in groove corresponding on mandrel 1 respectively.Upper plane bearing 6a, anti-lost fixture block 6b, lower plane bearing 6f and adjustment ring 6g constitute one group of bearing system that can run well, and work under oil immersion environment, it is not easy to be damaged；Anti-lost fixture block 6b is stuck in the draw-in groove of mandrel 1 by the anti-lost snap ring of multiple tracks, it is achieved axially position, and is fixed on mandrel 1 by drop preventing mechanism 6.Drop preventing mechanism 6 and mandrel 1 are integrally forming, it is ensured that upper plane bearing 6a and lower plane bearing 6f normal operation under high axial weight on bit.
The middle part of anti-lost fixture block 6b is fixed on mandrel 1 by fixture block backing-up screw 6c, the periphery of anti-lost fixture block 6b is set with cutting ferrule 6d, the lower end of cutting ferrule 6d is supported in the outer step of anti-lost fixture block 6b bottom, the lower section withstanding on check ring 6e of cutting ferrule 6d, check ring 6e is inlaid on the circumference of anti-lost fixture block 6b.Anti-lost fixture block 6b is fixed on mandrel 1 by fixture block backing-up screw 6c, and cutting ferrule 6d is enclosed within anti-lost annular table terrace corresponding for fixture block 6b, prevents anti-lost fixture block 6b to disengage from mandrel 1, and cutting ferrule 6d is axially positioned by check ring 6e.
As shown in Figure 5, Figure 6, the excircle of replaceable centralizer 7 uniformly has multiple tracks righting strip 7b respectively, and the axially middle part of replaceable centralizer 7 is screwed on body 5 by multiple centralizer backing-up screw 7a, and each centralizer backing-up screw 7a is distributed along the even circumferential of body 5.Replaceable centralizer 7 is independent sleeve structure, and righting strip 7b thereon according to user's request, can be fabricated to three to six, it is fabricated to the rotation direction such as vertical bar, spiral bar, according to the Construction Condition of drilling well, required replaceable centralizer 7 can be selected, greatly reduces construction cost at the scene.
The lower end of shell 8 is connected with body seal lid 8d, and the lower end of body seal lid 8d is provided with the body seal groove towards mandrel 1, is embedded with shell rotary oil seal 8e in body seal groove.The body seal lid 8d and shell rotary oil seal 8e of the lower end of shell 8 can stop the lubricating oil in lower oil cavitie 10 up.
As shown in Figure 7 to 9, lower sealing device 11 includes lower piston 11a, and the inner wall lower of lower piston 11a is provided with down scrapes circle 11b, is provided with lower rotary oil seal 11c in the middle part of the inwall of lower piston 11a, and the upper inside wall of lower piston 11a is provided with lower piston self-lubricating composite bearing 11d；Under scrape the outer wall of circle 11b and lower rotary oil seal 11c and mandrel 1 and realize sealing, lower piston self-lubricating composite bearing 11d is stuck on the outer wall of mandrel 1；The outer wall top of lower piston 11a realizes sealing with cylinder sleeve 9 by biconvex oil sealing 11e, the outer wall bottom of lower piston 11a is provided with the lower piston cannelure 11a1 axially extended, the bottom of cylinder sleeve 9 is connected with the afterbody cylinder table of alignment pin 9c, alignment pin 9c and inserts in lower piston cannelure 11a1；It is filled with O 9d in the gap above thread segment that cylinder sleeve 9 and shell 8 phase spin.The in-house alignment pin 9c of lower seal is tightened on cylinder sleeve 9, and alignment pin 9c afterbody cylinder table inserts in lower piston cannelure 11a1, it is ensured that lower piston 11a does not rotate with mandrel 1；Lower piston self-lubricating composite bearing 11d can reduce the rotational resistance of mandrel 1 and play the effect of righting, the outer wall top of lower piston 11a realizes sealing with cylinder sleeve 9 by biconvex oil sealing 11e, the inwall of lower piston 11a scrapes the outer wall realization sealing of circle 11b and lower rotary oil seal 11c and mandrel 1 under passing through, lower rotary oil seal 11c can stop the downward seepage of lubricating oil of top, under scrape circle 11b and can stop the landwaste lower rotary oil seal 11c of injury of splashing.
The inner side of biconvex oil sealing 11e is arranged with two crests, and the outside corresponding with crest is arranged with two troughs, the radius of outside protuberance and the radius of inner recess and is r, the radius of outer recess and the radius of inner projection and is R and r=0.4 ~ 0.8R.The internal diameter protuberance of biconvex oil sealing 11e and lower piston 11a are having the bigger magnitude of interference, it is ensured that install smoothly, simultaneously mandrel 1 eccentric rotary, promote lower piston 11a radially displaced time, biconvex oil sealing 11e can seal the gap between cylinder sleeve 9 and lower piston 11a.
Being evenly distributed with multiple cylinder sleeve mud hole 9b on the lower port circumference of cylinder sleeve 9, the lower ending opening of each cylinder sleeve mud hole 9b, the upper end of cylinder sleeve mud hole 9b communicates with the lower surface of lower piston 11a；The upper surface of lower piston 11a is provided with lower piston oil groove 11f, and the upper end of lower piston oil groove 11f communicates with lower oil cavitie 10.Cylinder sleeve mud hole 9b on cylinder sleeve 9 can make the mud of mineshaft annulus enter in cylinder sleeve 9, promotes lower piston 11a motion, to keep the pressure balance of lower oil cavitie 10 and mineshaft annulus mud.
The foregoing is only the preferably possible embodiments of the present invention, the non-scope of patent protection therefore limiting to the present invention.In addition to the implementation, the present invention can also have other embodiments.All employings are equal to replacement or the technical scheme of equivalent transformation formation, all fall within the protection domain of application claims.The present invention can pass through without the technical characteristic described or adopt existing techniques in realizing, does not repeat them here.
Claims (12)
1. a screw drill transmission shaft assembly, including mandrel, the mandrel hydrophthalmia being provided with through centrally along axis of described mandrel, the upper end of described mandrel is provided with the male thread being connected with universal drive shaft, the lower end of described mandrel is provided with the box thread being connected with drill bit, it is characterized in that: the periphery of described mandrel is set with upper sleeve gasket from top to bottom successively, body, shell and cylinder sleeve, the upper end of described upper sleeve gasket is provided with the male thread being connected with universal shaft housing, the upper end of the lower end of described upper sleeve gasket and described body spins mutually, the upper end of the lower end of described body and described shell spins mutually, the upper end of the bottom of described shell and described cylinder sleeve spins mutually；The outer wall of the inwall of described upper sleeve gasket and described mandrel realizes sealing by upper sealing device, upper oil cavitie is formed between the upper surface of described upper sealing device and described body, the epimere of described body is provided with body oiling passage and communicates with described upper oil cavitie, and the external port of described body oiling passage is closed by body oiling plug；The epimere inwall of described body is supported on described mandrel periphery by body self-lubricating composite bearing, the hypomere inwall of described body is connected with the outer wall of described mandrel by drop preventing mechanism, described drop preventing mechanism is immersed in oil pocket, and the periphery of described body is connected with replaceable centralizer；The inwall of described shell is supported on described mandrel periphery by shell self-lubricating composite bearing；The outer wall of the inwall of described cylinder sleeve and described mandrel realizes sealing by lower sealing device, is provided with lower oil cavitie between the lower end of described lower sealing device and described shell, and described cylinder sleeve is provided with lower oiling plug and communicates with described lower oil cavitie.
2. screw drill transmission shaft assembly according to claim 1, it is characterized in that: the middle part of described shell is provided with shell oiling passage, described shell oiling passage communicates with described shell self-lubricating composite bearing, and the external port closure of described shell oiling passage has shell oiling plug.
3. screw drill transmission shaft assembly according to claim 1, it is characterized in that: described upper sealing device includes upper piston, the upper inside wall of described upper piston is provided with scrapes circle, being provided with rotary oil seal in the middle part of the inwall of described upper piston, the inner wall lower of described upper piston is provided with upper piston self-lubricating composite bearing；Scraping the outer wall realization sealing of circle and upper rotary oil seal and described mandrel on described, described upper piston self-lubricating composite bearing is stuck on the outer wall of described mandrel；The outer wall of described upper piston is sequentially provided with many group O and friction sleeve in the axial direction.
4. screw drill transmission shaft assembly according to claim 3, it is characterised in that: the bottom of described upper piston is provided with upper piston oil duct, and the lower end of described upper piston oil duct communicates with described upper oil cavitie；The upper end of described upper piston oil duct inwardly leads to the outlet of each interior oilhole, the upper end of described upper piston oil duct outwards leads to the outlet of each outer oilhole respectively, and described interior oilhole is on described between rotary oil seal and described upper piston self-lubricating composite bearing and be circumferentially uniformly distributed；Described outer oilhole lays respectively at described in each group between O and friction sleeve and is circumferentially uniformly distributed.
5. screw drill transmission shaft assembly according to claim 4, it is characterized in that: the top of described upper piston is provided with upper piston slurry channel, described upper piston slurry channel inwardly leads to interior mud hole exits, and described upper piston slurry channel outwards leads to outer mud hole exits；Described interior mud hole scrape circle on described and be described between rotary oil seal and be circumferentially uniformly distributed, described outer mud hole is positioned at more than the described O of top and is circumferentially uniformly distributed.
6. screw drill transmission shaft assembly according to claim 1, it is characterized in that: described drop preventing mechanism includes plane bearing, anti-lost fixture block, lower plane bearing and regulates ring, the top of described upper plane bearing withstands on below the interior step of described body, the lower support of described upper plane bearing is on described anti-lost fixture block, the lower support of described anti-lost fixture block is on described lower plane bearing, the lower support of described lower plane bearing is on described adjustment ring, and the lower support of described adjustment ring is in the upper port of described shell；Described anti-lost fixture block is surrounded by symmetrical two halves and forms, and the inner peripheral wall of described anti-lost fixture block is provided with the anti-lost snap ring of multiple tracks and each anti-lost snap ring is inlaid in draw-in groove corresponding on described mandrel respectively.
7. screw drill transmission shaft assembly according to claim 6, it is characterized in that: the middle part of described anti-lost fixture block is fixed on described mandrel by fixture block backing-up screw, the periphery of described anti-lost fixture block is set with cutting ferrule, the lower end of described cutting ferrule is supported in the outer step of described anti-lost fixture block bottom, the lower section withstanding on check ring of described cutting ferrule, described check ring is inlaid on the circumference of described anti-lost fixture block.
8. screw drill transmission shaft assembly according to claim 1, it is characterized in that: the excircle of described replaceable centralizer uniformly has multiple tracks righting strip respectively, the axially middle part of described replaceable centralizer spins on the body by multiple centralizer backing-up screws, and each described centralizer backing-up screw is distributed along the even circumferential of described body.
9. screw drill transmission shaft assembly according to claim 1, it is characterized in that: the lower end of described shell is connected with body seal lid, the lower end of described body seal lid is provided with the body seal groove towards described mandrel, is embedded with shell rotary oil seal in described body seal groove.
10. screw drill transmission shaft assembly according to claim 1, it is characterized in that: described lower sealing device includes lower piston, the inner wall lower of described lower piston is provided with down scrapes circle, being provided with lower rotary oil seal in the middle part of the inwall of described lower piston, the upper inside wall of described lower piston is provided with lower piston self-lubricating composite bearing；Scraping the outer wall realization sealing of circle and lower rotary oil seal and described mandrel under described, described lower piston self-lubricating composite bearing is stuck on the outer wall of described mandrel；The outer wall top of described lower piston realizes sealing by biconvex oil sealing and described cylinder sleeve, the outer wall bottom of described lower piston is provided with the lower piston cannelure axially extended, the bottom of described cylinder sleeve is connected with alignment pin, and the afterbody cylinder table of described alignment pin inserts in described lower piston cannelure；It is filled with O in the gap above thread segment that described cylinder sleeve and described shell spin mutually.
11. screw drill transmission shaft assembly according to claim 10, it is characterized in that: the inner side of described biconvex oil sealing is arranged with two crests, the outside corresponding with described crest is arranged with two troughs, the outside radius of protuberance and the radius of inner recess are r, the radius of outer recess and the radius of inner projection and are R and r=0.4 ~ 0.8R.
12. screw drill transmission shaft assembly according to claim 10, it is characterized in that: the lower port circumference of described cylinder sleeve is evenly distributed with multiple cylinder sleeve mud hole, the lower ending opening in each described cylinder sleeve mud hole, the described upper end in cylinder sleeve mud hole communicates with the lower surface of described lower piston；The upper surface of described lower piston is provided with lower piston oil groove, and the upper end of described lower piston oil groove communicates with described lower oil cavitie.
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| CN201410504623.2A CN104278948B (en) | 2014-09-28 | 2014-09-28 | A kind of screw drill transmission shaft assembly |
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| CN201410504623.2A CN104278948B (en) | 2014-09-28 | 2014-09-28 | A kind of screw drill transmission shaft assembly |
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| CN104278948B true CN104278948B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106150341A (en) * | 2016-08-25 | 2016-11-23 | 天津立林石油机械有限公司 | Double compensation automatic pressure-regulating oil seal transmission shaft assembly |
| CN110925425A (en) * | 2019-12-02 | 2020-03-27 | 中国石油集团西部钻探工程有限公司 | Up-down floating sealing tool |
| CN114352186B (en) * | 2021-08-20 | 2024-04-30 | 四川深远石油钻井工具股份有限公司 | Anti-blocking structure and anti-blocking drilling tool with same |
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|---|---|---|---|---|
| EP0658681A2 (en) * | 1993-12-15 | 1995-06-21 | Walter, Hans-Philipp | Drill hammer |
| CN101158196A (en) * | 2007-10-16 | 2008-04-09 | 雅致集成房屋股份有限公司 | Suspended ceiling structure for mobile house |
| CN202227977U (en) * | 2011-09-06 | 2012-05-23 | 西南石油大学 | Transmission shaft assembly of screw drilling tool for balancing pressure of oil seal cavity |
| 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 |
| CN204139964U (en) * | 2014-09-28 | 2015-02-04 | 扬州天业石油机械有限公司 | A kind of screw drill transmission shaft assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7832502B2 (en) * | 2008-02-08 | 2010-11-16 | Javins Corporation | Methods and apparatus for drilling directional wells by percussion method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0658681A2 (en) * | 1993-12-15 | 1995-06-21 | Walter, Hans-Philipp | Drill hammer |
| CN101158196A (en) * | 2007-10-16 | 2008-04-09 | 雅致集成房屋股份有限公司 | Suspended ceiling structure for mobile house |
| CN202227977U (en) * | 2011-09-06 | 2012-05-23 | 西南石油大学 | Transmission shaft assembly of screw drilling tool for balancing pressure of oil seal cavity |
| 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 |
| CN204139964U (en) * | 2014-09-28 | 2015-02-04 | 扬州天业石油机械有限公司 | A kind of screw drill transmission shaft assembly |
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