CN102635312B - Hydraulic telescoping rigid support reaming-while-drilling tool - Google Patents
Hydraulic telescoping rigid support reaming-while-drilling tool Download PDFInfo
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- CN102635312B CN102635312B CN201210120146.0A CN201210120146A CN102635312B CN 102635312 B CN102635312 B CN 102635312B CN 201210120146 A CN201210120146 A CN 201210120146A CN 102635312 B CN102635312 B CN 102635312B
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Abstract
The invention relates to a hydraulic telescoping rigid support reaming-while-drilling tool, which is applied to a reaming-while-drilling technology for drilling operations in oil and gas fields. The invention adopts the following technical scheme: the lower end of a reverse central shaft and a main piston are in threaded connection with each other and positioned by using a bolt, and a reverse hydraulic cylinder and the upper part of the reverse central shaft are in threaded connection with each other and positioned by using a bolt; an upper joint is sequentially in threaded connection with a main shell and a lower joint, and two connecting bodies are connected by using shear pins; a sliding sleeve is arranged in the reverse central shaft, and connected by using a shear pin; a joint of the reverse hydraulic cylinder is connected with the reverse hydraulic cylinder by using a shear pin, and a small steel ball is arranged in the joint of the reverse hydraulic cylinder; a small piston, a small cylinder sleeve and a small spring are arranged between the upper joint and the reverse central shaft; three PDC (primary domain controller) tool rests are uniformly distributed on the main piston, and connected by using hinge pins, and the tool rest is provided with teeth; and a clamp spring, a piston pressing plate, a rubber cup and a cup bowl are arranged between the main shell and the main piston. The reaming tool disclosed by the invention ensures that the axial and radial positions of the PDC tool rests after being unfolded are firm and invariant, and has the advantages of no hole shrinkage and bit sticking; and the reaming tool is applied to drilling operations.
Description
Technical field
The present invention relates to a kind ofly support with boring hole reaming tool with the hydraulic telescopic type that bores reaming hole technology is hard for oilfield drilling operation.
Background technology
A kind of drilling well new technology with development potentiality with boring reaming hole technology.What is called adopts with boring hole reaming tool and conventional bit program exactly with boring reaming hole technology, expands a kind of drilling technology of borehole diameter in creeping into comprehensively.Can realize the well section well cementation of the little gap of deep-well with boring reaming hole technology, increase the size of production casing, be conducive to completion and workover treatment.Two kinds of the hole reaming tool You Shuan center re-drill bit of development and collapsible reamer both at home and abroad.The former utilizes eccentric block to carry out hole enlargement under revolution, and hole enlargement amount is subject to the restriction of top well section casing inner diameter; The latter utilizes the wing with retractility to realize hole enlargement, hole enlargement amount is not subject to the restriction of top well section casing inner diameter, can realize the hole enlargement of larger displacement, its stretch mode is determining the reliability of hole enlargement, and existing collapsible reamer is nearly all to realize the flexible of wing by spring and hydraulic way, belongs to soft support, be subject to the impact of rock of borehole soft or hard degree, easily form sugarcoated haws well, particularly on the instrument of small scale structures, be difficult to realize, fail to be widely applied.
Summary of the invention
The object of the invention is: in order to solve eccentric type with boring that the hole diameter that forms of hole reaming tool is irregular, hole enlargement amount is little and the soft support drill-following reamer of fluid pressure type easily forms the problem of sugarcoated haws well, ensure that PDC knife rest is axially constant with position stability radially after stretching out, reach the object of hard support, make the well that gets out more stable, there is not undergauge, bit freezing not, can meet the demand of Slim Hole Sidetracking Technology operating mode, spy provides the hard support of a kind of hydraulic telescopic type with boring hole reaming tool.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of hydraulic telescopic type is hard to be supported with boring hole reaming tool, is made up of back central axis, back fluid cylinder, back fluid cylinder joint, top connection, main casing, main piston, lower contact, PDC knife rest, PDC tooth, sliding sleeve, valve piston, little cylinder sleeve, positioning sleeve, spring, guide finger, steel ball, shear pin, jump ring, piston pressing plate, rubber cup, leather cup cup, O-ring seals.Its architectural feature is: back central axis lower end is integrated with being threaded with main piston, and with backing-up screw location, and back fluid cylinder, and is located with slotted screw with being threaded with the top of back central axis; Top connection with main casing with being threaded, then by main casing with lower contact with being threaded, between main piston and main casing, be connected with two shear pins three; Between back fluid cylinder joint and back fluid cylinder, be connected with two shear pins two; In back central axis, sliding sleeve is set, between sliding sleeve and back central axis, is connected with two shear pins one, on sliding sleeve, place steel ball; Between top connection and back central axis, be provided with valve piston, little cylinder sleeve and little spring; Between top connection and back fluid cylinder joint, be provided with positioning sleeve, spring and bolt; Three PDC knife rests are distributed on main piston circumference, between PDC knife rest and main piston, are connected with bearing pin, and hole back-up ring is housed on bearing pin, and PDC tooth is installed on PDC knife rest; Between main casing and main piston, be provided with jump ring, piston pressing plate, rubber cup and leather cup cup; Between back fluid cylinder joint and back central axis, be provided with guide finger.In back fluid cylinder joint and back central axis, be all processed with pressure release passage, in the pressure release passage of back fluid cylinder joint, be provided with small ball.Be processed with three runners that rinse PDC knife rest in inside, main casing lower end, three 120 °, runner interval distributions, the corresponding PDC knife rest front lower place and outward-dipping of each runner, in main piston, be processed with three groups of bearing pin slideways that tilt, three groups of 120 °, slideway interval distributions, every group of corresponding PDC knife rest of slideway.Between back central axis and back fluid cylinder, be provided with the first O-ring seals; Between back central axis and sliding sleeve, be provided with two groups of O-ring seals, one group, top is the second O-ring seals, and one group of bottom is the 3rd O-ring seals; Between back fluid cylinder and back fluid cylinder joint, be provided with two groups of O-ring seals, one group, top is the 4th O-ring seals, and one group of bottom is the 5th O-ring seals; Between back central axis and back fluid cylinder joint, be provided with two groups of O-ring seals, one group, top is the 17 O-ring seals, and one group of bottom is the 6th O-ring seals; Between back central axis and top connection, be provided with two groups of O-ring seals, one group, top is the 7th O-ring seals, and one group of bottom is the 9th O-ring seals; Between top connection and little cylinder sleeve, be provided with the 8th O-ring seals; Between little cylinder sleeve and valve piston, be provided with the 18 O-ring seals; Between top connection and main casing, be provided with the tenth O-ring seals; Between main casing and main piston, be provided with five groups of O-ring seals, be followed successively by from top to bottom the 11 O-ring seals, the 13 O-ring seals, the 14 O-ring seals, the 15 O-ring seals, the 16 O-ring seals; Between back central axis and main piston, be provided with the 12 O-ring seals.
Three above-mentioned PDC knife rests, the profile of every PDC knife rest is stairstepping, has all adopted staged cloth toothing.
The present invention compared with the prior art, has following beneficial effect: (1) this tool construction has mechanical interlocking function, can ensure that PDC knife rest position stability axially and radially after stretching out is constant, reaches the object of hard support, makes the well that gets out more stable; (2) there is not undergauge, bit freezing not, can meet the demand of Slim Hole Sidetracking Technology operating mode; (3) this instrument hydraulic structure is conducive to cutter tooth and gets rid of landwaste, prevents that cutter tooth from being blocked by landwaste in the time regaining; (4) this instrument cutting is brisk, vibrates littlely, can withstand shocks, and can ensure intensity and the durability of cutter tooth.
Brief description of the drawings
Fig. 1 is the hard overall structure schematic diagram supporting with brill hole reaming tool of hydraulic telescopic type of the present invention.
Fig. 2 is that after the pitching of this hole reaming tool builds the pressure, cutter is regained structural representation.
Fig. 3 is C-C sectional view of Fig. 2.
Fig. 4 be this hole reaming tool PDC knife rest regain time knife rest cross section structure schematic diagram.
Fig. 5 is the knife rest cross section structure schematic diagram after the PDC knife rest of this hole reaming tool stretches out.
In figure: 1-back central axis, 2-slotted screw, 3-back fluid cylinder, the 4-the one O RunddichtringO, 5-shear pin one, the 6-the two O RunddichtringO, 7-sliding sleeve, the 8-the three O RunddichtringO, 9-small ball, the 10-the four O RunddichtringO, the 11-the five O RunddichtringO, the 12-the six O RunddichtringO, 13-shear pin two, 14-guide finger, 15-back fluid cylinder joint, the 16-the seven O RunddichtringO, 17-little cylinder sleeve, 18-valve piston, 19-little spring, the 20-the eight O RunddichtringO, 21-top connection, the 22-the nine O RunddichtringO, the 23-the ten O RunddichtringO, 24-backing-up screw, 25-jump ring, 26-piston pressing plate, 27-rubber cup, 28-leather cup cup, the 29-the ten one O RunddichtringO, the 30-the ten two O RunddichtringO, the 31-the ten three O RunddichtringO, 32-main piston, 33-shear pin three, 34-PDC knife rest, 35-PDC tooth, 36-main casing, the 37-the ten four O RunddichtringO, the 38-the ten five O RunddichtringO, the 39-the ten six O RunddichtringO, 40-lower contact, the 41-the ten seven O RunddichtringO, the 42-the ten eight O RunddichtringO, 43-steel ball, 44-spring, 45-bolt, 46-positioning sleeve, 47-bearing pin, 48-hole back-up ring.
Detailed description of the invention
According to Fig. 1, each component are assembled, whole upper tool part is connected with drilling rod by the screw buckle of back central axis 1, and tool lower portion is connected with drill bit by the screw buckle of lower contact 40, then goes into the well to arrive and specifies drilling well position, open borehole pump, drilling fluid enters the annular space of back central axis 1, the pressure differential acting on main piston 32 upper and lower end faces by means of cleaner for high-pressure drilling fluid produces certain static pressure, promotion valve piston 18 compresses little spring 19 and slides laterally, in the time that valve piston 18 slips away back central axis 1, top connection 21, shear pin 3 33 is cut off in main casing 36 and PDC knife rest 34 and lower contact 40, up along back central axis 1 and main piston 32, PDC knife rest 34 outwards opens up into design size along the bearing pin slideway in main piston 32, main piston 32 passes to PDC knife rest 34 by bearing pin 47 by power, thereby continuously effect make PDC tooth 35 down rock cutting form mechanical drilling depth, drilling fluid nozzle along three runners under the effect of chock pressure difference sprays, rinse PDC knife rest 34, remove landwaste, meanwhile, utilize the positioning sleeve 46 in top connection 21 that top connection 21 is connected extremely with back fluid cylinder joint 15, and main piston 32 is firmly motionless, has realized hard support, makes the position of PDC knife rest 34 firmly constant, thereby the borehole size getting out rule is stable.
In the time that needs are regained PDC knife rest 34, on carry one meter of drill string, drop into steel ball 43, build the pressure and cut off the shear pin 1 between sliding sleeve 7 and back central axis 1, force sliding sleeve 7 to move down, make drilling fluid enter back fluid cylinder 3, under the effect of cleaner for high-pressure drilling fluid, promote back fluid cylinder joint 15 and cut off shear pin 2 13, force back fluid cylinder joint 15, top connection 21, main casing 36 and PDC knife rest 34 and lower contact 40 to move down together with main piston 32 along central axis 1, under the effect of bearing pin 47 and bearing pin slideway, brute force forces PDC knife rest 34 to be recovered to original design size; Now, pressure release passage mouth alignment on pressure release passage and back central axis 1 on back fluid cylinder joint 15, small ball 9 in back fluid cylinder joint 15 enters the pressure release passage in back central axis 1, whole pressure release passage is opened, end builds the pressure, drilling fluid re-establishes circulation, and ground handling personnel can change to determine whether PDC knife rest 34 is retracted completely by the pump pressure of borehole pump whereby, thus the generation of lock of tool drilling while avoiding pulling out of hole.
Claims (5)
1. hard the support with boring hole reaming tool of hydraulic telescopic type, by back central axis, back fluid cylinder, back fluid cylinder joint, top connection, main casing, main piston, lower contact, PDC knife rest, PDC tooth, sliding sleeve, valve piston, little cylinder sleeve, positioning sleeve, spring, guide finger, steel ball, shear pin, jump ring, piston pressing plate, rubber cup, leather cup cup, O-ring seals composition, it is characterized in that: back central axis (1) lower end is integrated with being threaded with main piston (32), and locate with backing-up screw (24), back fluid cylinder (3) with the top of back central axis (1) with being threaded, and locate with slotted screw (2), top connection (21) with main casing (36) with being threaded, then by main casing (36) with lower contact (40) with being threaded, between main piston (32) and main casing (36), be connected with two shear pins three (33), between back fluid cylinder joint (15) and back fluid cylinder (3), be connected with two shear pins two (13), sliding sleeve (7) is set in back central axis (1), between sliding sleeve (7) and back central axis (1), is connected with two shear pins one (5), the upper steel ball (43) of placing of sliding sleeve (7), between top connection (21) and back central axis (1), be provided with valve piston (18), little cylinder sleeve (17) and little spring (19), between top connection (21) and back fluid cylinder joint (15), be provided with positioning sleeve (46), spring (44) and bolt (45), three PDC knife rests (34) are distributed on main piston (32) circumference, between PDC knife rest (34) and main piston (32), are connected with bearing pin (47), and back-up ring for hole (48) is housed on bearing pin (47), and PDC tooth (35) is installed on PDC knife rest (34), between main casing (36) and main piston (32), be provided with jump ring (25), piston pressing plate (26), rubber cup (27) and leather cup cup (28), between back fluid cylinder joint (15) and back central axis (1), be provided with guide finger (14).
2. hydraulic telescopic type according to claim 1 is hard supports with boring hole reaming tool, it is characterized in that: in back fluid cylinder joint (15) and back central axis (1), be all processed with pressure release passage, in the pressure release passage of back fluid cylinder joint (15), be provided with small ball (9).
3. hydraulic telescopic type according to claim 1 is hard supports with boring hole reaming tool, it is characterized in that: be processed with three runners that clean PDC knife rest (34) in main casing (36) inside, lower end, three 120 °, runner interval distributions, corresponding PDC knife rest (34) front lower place and outward-dipping of each runner, in main piston (32), be processed with three groups of bearing pin slideways that tilt, three groups of 120 °, slideway interval distributions, every group of corresponding PDC knife rest of slideway (34).
4. hydraulic telescopic type according to claim 1 is hard supports with boring hole reaming tool, it is characterized in that: above-mentioned three PDC knife rests (34), the profile of every PDC knife rest (34) is stairstepping, has all adopted staged cloth toothing.
5. hydraulic telescopic type according to claim 1 is hard supports with boring hole reaming tool, it is characterized in that: between back central axis (1) and back fluid cylinder (3), be provided with the first O-ring seals (4); Between back central axis (1) and sliding sleeve (7), be provided with two groups of O-ring seals, one group, top is the second O-ring seals (6), and one group of bottom is the 3rd O-ring seals (8); Between back fluid cylinder (3) and back fluid cylinder joint (15), be provided with two groups of O-ring seals, one group, top is the 4th O-ring seals (10), and one group of bottom is the 5th O-ring seals (11); Between back central axis (1) and back fluid cylinder joint (15), be provided with two groups of O-ring seals, one group, top is the 17 O-ring seals (41), and one group of bottom is the 6th O-ring seals (12); Between back central axis (1) and top connection (21), be provided with two groups of O-ring seals, one group, top is the 7th O-ring seals (16), and one group of bottom is the 9th O-ring seals (22); Between top connection (21) and little cylinder sleeve (17), be provided with the 8th O-ring seals (20); Between little cylinder sleeve (17) and valve piston (18), be provided with the 18 O-ring seals (42); Between top connection (21) and main casing (36), be provided with the tenth O-ring seals (23); Between main casing (36) and main piston (32), be provided with five groups of O-ring seals, be followed successively by from top to bottom the 11 O-ring seals (29), the 13 O-ring seals (31), the 14 O-ring seals (37), the 15 O-ring seals (38), the 16 O-ring seals (39); Between back central axis (1) and main piston (32), be provided with the 12 O-ring seals (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120146.0A CN102635312B (en) | 2012-04-24 | 2012-04-24 | Hydraulic telescoping rigid support reaming-while-drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120146.0A CN102635312B (en) | 2012-04-24 | 2012-04-24 | Hydraulic telescoping rigid support reaming-while-drilling tool |
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| Publication Number | Publication Date |
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| CN102635312A CN102635312A (en) | 2012-08-15 |
| CN102635312B true CN102635312B (en) | 2014-10-01 |
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| CN201210120146.0A Expired - Fee Related CN102635312B (en) | 2012-04-24 | 2012-04-24 | Hydraulic telescoping rigid support reaming-while-drilling tool |
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| CN104481404B (en) * | 2014-10-15 | 2016-06-22 | 西南石油大学 | A kind of big reducing hole reaming tool of Jackstay type two wing |
| CN108643854B (en) * | 2018-04-23 | 2020-05-19 | 西华大学 | Hydraulic telescopic type section milling sidetracking tool |
| CN109931021A (en) * | 2019-04-15 | 2019-06-25 | 西华大学 | A kind of bilayer sleeve milling device |
| CN112459739B (en) * | 2020-12-16 | 2022-05-06 | 南智（重庆）能源技术有限公司 | Variable-diameter drilling and milling device for oil and gas well |
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| RU2117747C1 (en) * | 1997-02-28 | 1998-08-20 | Татарский научно-исследовательский и проектный институт нефти | Bore-hole reamer |
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2012
- 2012-04-24 CN CN201210120146.0A patent/CN102635312B/en not_active Expired - Fee Related
Patent Citations (7)
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| RU2117747C1 (en) * | 1997-02-28 | 1998-08-20 | Татарский научно-исследовательский и проектный институт нефти | Bore-hole reamer |
| US6378632B1 (en) * | 1998-10-30 | 2002-04-30 | Smith International, Inc. | Remotely operable hydraulic underreamer |
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Granted publication date: 20141001 Termination date: 20160424 |