CN104863509A - Variable-diameter type back reaming machine - Google Patents
Variable-diameter type back reaming machine Download PDFInfo
- Publication number
- CN104863509A CN104863509A CN201510243485.1A CN201510243485A CN104863509A CN 104863509 A CN104863509 A CN 104863509A CN 201510243485 A CN201510243485 A CN 201510243485A CN 104863509 A CN104863509 A CN 104863509A
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- dummy piston
- pole
- back reaming
- center
- piston bar
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- 239000000956 alloy Substances 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 26
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 239000003381 stabilizer Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000006386 neutralization reaction Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (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 invention provides a variable-diameter type back reaming machine which comprises a center rod, a bearing end cover, a body, a balanced piston rod, a balanced piston, a spring, an oil injection plug, a bevel tube, a hard alloy block and a cutting block; the balanced piton rod and the bevel tube are arranged in an annular space formed by connecting the center rod with the body, the bevel tube is arranged at the bottom of the balanced piston rod, the spring is arranged in an annular space formed by the balanced piston rod and the center rod, the two ends of the spring are connected with the center rod and the bevel tube, the balanced piston is arranged in an annular space formed by the balanced piston rod and the body, the bearing end cover is arranged on the upper portion of the body, the middle of the body is of a straight edge structure, the oil injection plug is arranged on the upper portion of the body, the middle part of the bevel tube is a bevel which is provided with a dovetail groove, the cutting block is composed of a cutting section and a piston section, the cutting section is arranged on the straight edge, and the piston section penetrates through the body and is connected with the bevel tube. According to the variable-diameter type back reaming machine, only when back reaming machine is lifted up in pumping, the cutting block of the back reaming machine extends out to trim the sidewall, the back reaming function is achieved, and the normal drilling operation is not affected.
Description
Technical field
The invention belongs to downhole tool technical field, be specifically related to a kind of reducing type back reaming device.
Background technology
In the drilling process of caving ground, the easy necking down of well, causes on drilling tool and carries the card that is hampered, and cannot trip out, and now needs Shang Ti limit, limit rotary tools, and the finishing borehole wall, borehole diameter is expanded, and this process is called back reaming operation.
When carrying out back reaming operation, often utilize the inclined-plane, upper end of fixed drilling tool stabilizer (on this face, heap is welded with carbide alloy) to repair the borehole wall, after stabilizer passes through, the recycling bit dressing borehole wall, completes whole back reaming operation.
But the shortcoming of this kind of method shows as: the cutting power on inclined-plane, stabilizer upper end is limited, revise the borehole wall time-consuming many, efficiency is low; In addition fixed stabilizer external diameter is comparatively large, and bit freezing risk is high.
In order to overcome the risk of the easy blocked portion of fixed stabilizer, (when turn on pump, piston type supporting member stretches out drilling well to use a kind of tapered stabilizer, during termination of pumping, piston type supporting member is retracted), effectively reduce the risk of trip-out blocked portion, but when this tapered stabilizer carries back reaming on turn on pump, piston type supporting member does not have the ability revising the borehole wall, cannot carry out back reaming operation, constrain it and apply.
Summary of the invention
The object of the invention is the defect overcoming prior art existence, provide a kind of reducing type back reaming device, be connected to built-in stabilizer or tapered stabilizer top, when only carrying back reaming on turn on pump, the cutting blocks of this back reaming device stretches out, revise the borehole wall, other in any case cutting blocks all retract, do not affect normal drilling operability.
Technical scheme of the present invention there is provided a kind of reducing type back reaming device, comprises center-pole, load-bearing end cap, body, dummy piston bar, dummy piston, spring, oiling plug, inclined-plane cylinder, hard alloy blocks and cutting blocks, described center-pole is connected with body and forms annular space, dummy piston bar and inclined-plane cylinder are arranged in this annular space, described dummy piston bar upper end is threaded with center-pole, inclined-plane cylinder is placed in the bottom of dummy piston bar, dummy piston bar and form annular space respectively between center-pole and body, spring is placed in the annular space that dummy piston bar and center-pole formed, and its two ends are connected with center-pole and inclined-plane cylinder respectively and are in compressive state, dummy piston is placed in the annular space that dummy piston bar and body formed, described load-bearing end cap is arranged on the top of body, it is straightedge structure in the middle part of described body, oil filler point is provided with above straightedge, oiling plug is installed in this oil filler point, it is the inclined-plane of band dovetail groove in the middle part of described inclined-plane cylinder, the lower end of inclined-plane cylinder to be seated in body lower part on step, described cutting blocks is made up of mutual segment of cutting connected vertically and piston section, segment of cutting is arranged in the straightedge structure of body, piston section is crossed body and is connected with inclined-plane cylinder, described hard alloy blocks is embedded on segment of cutting, described piston section end is provided with the inclined-plane notch matched with the inclined-plane of dovetail groove.
Be connected with adopting spline pair between body in the middle part of above-mentioned center-pole, dummy piston bar is placed in below spline pair.
Above-mentioned load-bearing end cap is two halves structure, and split is arranged on body upper part and is welded into a whole with it.
Above-mentioned body is provided with through hole, and this through hole is communicated with borehole wall annular space with dummy piston bar upper cavity.
Straightedge structure in the middle part of above-mentioned body has 3 ~ 4.
Oil filler point above above-mentioned body straightedge is 2 and is symmetrical arranged.
Between above-mentioned center-pole and dummy piston bar, between body and oiling plug, between piston section and body, dummy piston and cylinder lower end, inclined-plane are provided with sealing ring.
Above-mentioned center-pole, dummy piston bar, dummy piston, body, oiling plug, cutting blocks, inclined-plane cylinder surround formation annular seal space, and sealing fills hydraulic oil in chamber.
Above-mentioned dummy piston is floating piston.
Beneficial effect of the present invention:
(1) this reducing type back reaming device provided by the invention is connected to fixed stabilizer or tapered stabilizer upper end, and be in below the drilling tool point of neutralization, when creeping into, cutting blocks does not stretch out; When turn on pump being carried drilling tool, cutting blocks stretches out, and the finishing borehole wall plays back reaming effect; During trip-out, cutting blocks does not stretch out, and does not affect normal trip-out.
(2) spline joint is adopted between the center-pole of this reducing type back reaming device provided by the invention and body, the moment of torsion that rig produces passes to drill bit by this spline pair, center-pole and body can produce relative motion in the vertical direction, ensure that center-pole can realize stretching out and retraction of cutting blocks in the process of put-on and delegated.
(3) body upper part of this reducing type back reaming device provided by the invention is provided with two halves formula load-bearing end cap, when center-pole is carried, the all drilling tool weight in bottom is hung on center-pole spline pair by load-bearing end cap, avoids inner body and bears drilling tool weight, ensures the safety of instrument.
(4) center-pole of this reducing type back reaming device provided by the invention and dummy piston burr spatial placement have spring, and are in compressive state all the time between center-pole and inclined-plane cylinder, have enough elastic force that inclined-plane cylinder is resetted after ensureing termination of pumping.
(5) the inclined-plane cylinder of this reducing type back reaming device provided by the invention and cutting blocks adopt inclined-plane, dovetail groove fit structure, and when ensureing that inclined-plane cylinder is up, cutting blocks stretches out, and when inclined-plane cylinder is descending, cutting blocks is retracted; Meanwhile, inclined-plane cylinder up is that the power by producing with the pressure reduction of annular space in drilling tool promotes, and ensure that the reliability of instrument.
(6) fill hydraulic oil in the annular seal space that the center-pole of this reducing type back reaming device provided by the invention, dummy piston bar, dummy piston, body, oiling plug, cutting blocks, inclined-plane cylinder surround formation, protection inner body is from the erosion of drilling fluid.
(7) dummy piston of this reducing type back reaming device provided by the invention is floating piston, can the change of the oil chamber volume caused by motion of the part such as centre of equilibrium bar, dummy piston bar, cutting blocks, inclined-plane cylinder, oil chamber volume is consistent, ensures the smooth action of instrument.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation of reducing type back reaming device of the present invention.
Fig. 2 is the close-up schematic view of reducing type back reaming device of the present invention.
Fig. 3 is the structural representation of inclined-plane cylinder in reducing type back reaming device of the present invention.
Fig. 4 is the structural representation of cutting blocks in reducing type back reaming device of the present invention.
Description of reference numerals: 1, center-pole; 2, load-bearing end cap; 3, body; 4, sealing ring; 5, dummy piston bar; 6, dummy piston; 7, spring; 8, oiling plug; 9, inclined-plane cylinder; 10, hard alloy blocks; 11, cutting blocks; 12, spline pair; 13, through hole; 14, hydraulic oil; 15, dovetail groove; 16, segment of cutting; 17, piston section.
Detailed description of the invention
Embodiment 1:
Present embodiments provide a kind of reducing type back reaming device as shown in Figure 1, Figure 2, Figure 3 and Figure 4, comprise center-pole 1, load-bearing end cap 2, body 3, dummy piston bar 5, dummy piston 6, spring 7, oiling plug 8, inclined-plane cylinder 9, hard alloy blocks 10 and cutting blocks 11, described center-pole 1 is connected with body 3 and forms annular space, dummy piston bar 5 and inclined-plane cylinder 9 are arranged in this annular space, described dummy piston bar 5 upper end is threaded with center-pole 1, inclined-plane cylinder 9 is placed in the bottom of dummy piston bar 5, dummy piston bar 5 and form annular space respectively between center-pole 1 and body 3, spring 7 is placed in the annular space that dummy piston bar 5 and center-pole 1 formed, and its two ends are connected with center-pole 1 and inclined-plane cylinder 9 respectively and are in compressive state, dummy piston 6 is placed in the annular space that dummy piston bar 5 and body 3 formed, described load-bearing end cap 2 is arranged on the top of body 3, be straightedge structure in the middle part of described body 3, oil filler point is provided with above straightedge, oiling plug 8 is installed in this oil filler point, it is the inclined-plane of band dovetail groove 15 in the middle part of described inclined-plane cylinder 9, the lower end of inclined-plane cylinder 9 to be seated in body 3 bottom on step, described cutting blocks 11 is made up of mutual segment of cutting 16 connected vertically and piston section 17, segment of cutting 16 is arranged in the straightedge structure of body 3, piston section 17 is crossed body 3 and is connected with inclined-plane cylinder 9, described hard alloy blocks 10 is embedded on segment of cutting 16, described piston section 17 end is provided with the inclined-plane notch matched with the inclined-plane of dovetail groove 15.
The course of work of the present invention is as follows:
1, shaft bottom is drilled under
The present invention is connected to fixed stabilizer or tapered stabilizer upper end, is in below the drilling tool point of neutralization (i.e. pressurized).
As Fig. 1, during lower brill, center-pole 1 Lianping weighing apparatus piston rod 5 is up together, and dummy piston 6 is descending equilibrium oil cavity volume simultaneously, and lower drilling tool weight hangs on center-pole 1 by body 3, load-bearing end cap 2, dummy piston bar 5 and inclined-plane cylinder 9 are thrown off, spring 7 extends, but is in compressive state, and spring 7 withstands inclined-plane cylinder 9, inclined-plane cylinder 9 is not up, and cutting blocks 11 does not stretch out.
Under be drilled into shaft bottom, adjustment the pressure of the drill, now instrument is in below the drilling tool point of neutralization, center-pole 1 is descending together with dummy piston bar 5, the up equilibrium oil cavity volume of dummy piston 6, center-pole 1 withstands load-bearing end cap 2 top, by body 3 by load transfer to drill bit, spring 7 shortens, be in compressive state, dummy piston bar 5 withstands inclined-plane cylinder 9, and inclined-plane cylinder 9 is not up, cutting blocks 11 does not stretch out, and instrument status as shown in Figure 1.
2, normally creep into
State as shown in Figure 1, instrument is in below the drilling tool point of neutralization, dummy piston bar 5 withstands inclined-plane cylinder 9, during turn on pump, because the current limiting element such as helicoid hydraulic motor, bit nozzle has throttling action, make to form certain pressure reduction in drilling tool and between borehole wall annular space, in drilling tool, pressure is greater than borehole wall annular pressure, the active force that pressure reduction produces passes to center-pole 1 by inclined-plane cylinder 9, dummy piston bar 5, and inclined-plane cylinder 9 is not up, and cutting blocks 11 does not stretch out.
3, normal back reaming
State as shown in Figure 1, owing to being in turn on pump state during back reaming, center-pole 1 is up together with dummy piston bar 5, meanwhile, the active force that pressure reduction produces can promote inclined-plane cylinder 9, and to be close to dummy piston bar 5 up together, the descending equilibrium oil cavity volume of dummy piston 6, owing in the middle part of inclined-plane cylinder 9 being inclined-plane with dovetail groove 15 and dark lower shallow on dovetail groove 15, along with inclined-plane cylinder 9 is up, the inclined-plane of inclined-plane cylinder 9 ejects cutting blocks 11, the back reaming function of implementation tool, play the effect of the finishing borehole wall, in the process, lower drilling tool weight is by body 3, load-bearing end cap 2 hangs on center-pole 1.
Continue when normally creeping into, center-pole 1 is descending together with dummy piston bar 5, heads on inclined-plane cylinder 9 also descending simultaneously, and inclined-plane cylinder 9 drives cutting blocks 11 to retract, and in the process, center-pole 1 withstands load-bearing end cap 2 top, by body 3 by load transfer to drill bit.
4, short the back reaming that is hampered
As shown in Figure 1, when short, center-pole 1 is up together with dummy piston bar 5, and dummy piston 6 is descending equilibrium oil cavity volume simultaneously, and lower drilling tool weight hangs on center-pole 1 by body 3, load-bearing end cap 2, dummy piston bar 5 and inclined-plane cylinder 9 are thrown off, spring 7 extends, but is in compressive state, and spring 7 withstands inclined-plane cylinder 9, inclined-plane cylinder 9 is not up, and cutting blocks 11 does not stretch out; Short when being hampered, turn on pump, the active force that pressure reduction produces can promote inclined-plane cylinder 9 and go upward to and withstand dummy piston bar 5, Compress Spring 7, meanwhile ejects cutting blocks 11, can carry out back reaming operation.
5, normally pull out of hole
As shown in Figure 1, when termination of pumping pulls out of hole, center-pole 1 is up together with dummy piston bar 5, and dummy piston 6 is descending equilibrium oil cavity volume simultaneously, and lower drilling tool weight hangs on center-pole 1 by body 3, load-bearing end cap 2, dummy piston bar 5 and inclined-plane cylinder 9 are thrown off, spring 7 extends, but is in compressive state, and spring 7 withstands inclined-plane cylinder 9, inclined-plane cylinder 9 is not up, and cutting blocks 11 does not stretch out.
Embodiment 2:
On the basis of embodiment 1, be connected with adopting spline pair 12 between body 3 in the middle part of described center-pole 1, dummy piston bar 5 is placed in below spline pair 12, the moment of torsion that rig produces passes to drill bit by this spline pair 12, center-pole 1 and body 3 can produce relative motion in the vertical direction, ensure that center-pole 1 can realize stretching out and retraction of cutting blocks 11 in the process of put-on and delegated.
Described load-bearing end cap 2 is two halves structure, split is arranged on body 3 top and is welded into a whole with it, when two halves formula load-bearing end cap 2 is carried on center-pole, the all drilling tool weight in bottom hangs on the spline pair 12 of center-pole 1 by load-bearing end cap 2, avoid inner body and bear drilling tool weight, ensure the safety of instrument.
Described body 3 is provided with through hole 13, and this through hole 13 is communicated with borehole wall annular space with dummy piston bar 5 upper cavity; Straightedge structure in the middle part of described body 3 has 3 ~ 4; Oil filler point above described body 3 straightedge is 2 and is symmetrical arranged.
Between described center-pole 1 and dummy piston bar 5, between body 3 and oiling plug 8, between piston section 17 and body 3, dummy piston 6 and inclined-plane cylinder 9 lower end are provided with sealing ring 4; Described center-pole 1, dummy piston bar 5, dummy piston 6, body 3, oiling plug 8, cutting blocks 11, inclined-plane cylinder 9 surround formation annular seal space, fill hydraulic oil 14 in sealing chamber, and protection inner body is from the erosion of drilling fluid.
Described dummy piston 6 is floating piston, can the change of the oil chamber volume caused by motion of the part such as centre of equilibrium bar 1, dummy piston bar 5, cutting blocks 11, inclined-plane cylinder 9, oil chamber volume is consistent, ensures the smooth action of instrument.
In sum, this reducing type back reaming device provided by the invention overcomes the defect of prior art, and be connected to fixed stabilizer or tapered stabilizer upper end, be in below the drilling tool point of neutralization, when creeping into, cutting blocks does not stretch out; When turn on pump being carried drilling tool, cutting blocks stretches out, and the finishing borehole wall plays back reaming effect; During trip-out, cutting blocks does not stretch out, and does not affect normal trip-out.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (9)
1. a reducing type back reaming device, is characterized in that: comprise center-pole (1), load-bearing end cap (2), body (3), dummy piston bar (5), dummy piston (6), spring (7), oiling plug (8), inclined-plane cylinder (9), hard alloy blocks (10) and cutting blocks (11), described center-pole (1) is connected with body (3) and forms annular space, dummy piston bar (5) and inclined-plane cylinder (9) are arranged in this annular space, described dummy piston bar (5) upper end is threaded with center-pole (1), inclined-plane cylinder (9) is placed in the bottom of dummy piston bar (5), dummy piston bar (5) and form annular space respectively between center-pole (1) and body (3), spring (7) is placed in the annular space that dummy piston bar (5) and center-pole (1) formed, and its two ends are connected with center-pole (1) and inclined-plane cylinder (9) and are in compressive state respectively, dummy piston (6) is placed in the annular space that dummy piston bar (5) and body (3) formed, described load-bearing end cap (2) is arranged on the top of body (3), described body (3) middle part is straightedge structure, oil filler point is provided with above straightedge, oiling plug (8) is installed in this oil filler point, middle part, described inclined-plane cylinder (9) is the inclined-plane of band dovetail groove (15), the lower end of inclined-plane cylinder (9) to be seated in body (3) bottom on step, described cutting blocks (11) is made up of mutual segment of cutting connected vertically (16) and piston section (17), segment of cutting (16) is arranged in the straightedge structure of body (3), piston section (17) is crossed body (3) and is connected with inclined-plane cylinder (9), described hard alloy blocks (10) is embedded on segment of cutting (16), described piston section (17) end is provided with the inclined-plane notch matched with the inclined-plane of dovetail groove (15).
2. reducing type back reaming device as claimed in claim 1, it is characterized in that: described center-pole (1) middle part is connected with adopting spline pair (12) between body (3), dummy piston bar (5) is placed in spline pair (12) below.
3. reducing type back reaming device as claimed in claim 1, is characterized in that: described load-bearing end cap (2) is two halves structure, and split is arranged on body (3) top and is welded into a whole with it.
4. reducing type back reaming device as claimed in claim 1, it is characterized in that: described body (3) is provided with through hole (13), this through hole (13) is communicated with borehole wall annular space with dummy piston bar (5) upper cavity.
5. reducing type back reaming device as claimed in claim 1, is characterized in that: the straightedge structure at described body (3) middle part has 3 ~ 4.
6. reducing type back reaming device as claimed in claim 1, is characterized in that: the oil filler point above described body (3) straightedge is 2 and is symmetrical arranged.
7. reducing type back reaming device as claimed in claim 1, it is characterized in that: between described center-pole (1) and dummy piston bar (5), between body (3) and oiling plug (8), between piston section (17) and body (3), dummy piston (6) and inclined-plane cylinder (9) lower end are provided with sealing ring (4).
8. reducing type back reaming device as claimed in claim 1, it is characterized in that: described center-pole (1), dummy piston bar (5), dummy piston (6), body (3), oiling plug (8), cutting blocks (11), inclined-plane cylinder (9) surround formation annular seal space, fill hydraulic oil (14) in sealing chamber.
9. reducing type back reaming device as claimed in claim 1, is characterized in that: described dummy piston (6) is floating piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243485.1A CN104863509A (en) | 2015-05-14 | 2015-05-14 | Variable-diameter type back reaming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243485.1A CN104863509A (en) | 2015-05-14 | 2015-05-14 | Variable-diameter type back reaming machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104863509A true CN104863509A (en) | 2015-08-26 |
Family
ID=53909633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510243485.1A Pending CN104863509A (en) | 2015-05-14 | 2015-05-14 | Variable-diameter type back reaming machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104863509A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343381A (en) * | 2018-01-22 | 2018-07-31 | 长江大学 | A kind of flexible reaming while drilling device of hydraulic type |
| CN112459739A (en) * | 2020-12-16 | 2021-03-09 | 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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| CN2692335Y (en) * | 2004-03-11 | 2005-04-13 | 牡丹江建材石油机械厂 | Double gear fishing device |
| CN202117567U (en) * | 2011-07-01 | 2012-01-18 | 刘宝生 | Self-cleaning reaming device while drilling |
| CN202832209U (en) * | 2012-10-29 | 2013-03-27 | 中国石油化工股份有限公司 | Sidetracking well slim hole chambering tool |
| CN103742084A (en) * | 2014-01-02 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Variable gauge stabilizer |
| CN204646092U (en) * | 2015-05-14 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of reducing type back reaming device |
| CN105089502A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Variable-diameter back reaming device and process method |
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2015
- 2015-05-14 CN CN201510243485.1A patent/CN104863509A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2692335Y (en) * | 2004-03-11 | 2005-04-13 | 牡丹江建材石油机械厂 | Double gear fishing device |
| CN202117567U (en) * | 2011-07-01 | 2012-01-18 | 刘宝生 | Self-cleaning reaming device while drilling |
| CN202832209U (en) * | 2012-10-29 | 2013-03-27 | 中国石油化工股份有限公司 | Sidetracking well slim hole chambering tool |
| CN103742084A (en) * | 2014-01-02 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Variable gauge stabilizer |
| CN105089502A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Variable-diameter back reaming device and process method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343381A (en) * | 2018-01-22 | 2018-07-31 | 长江大学 | A kind of flexible reaming while drilling device of hydraulic type |
| CN112459739A (en) * | 2020-12-16 | 2021-03-09 | 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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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150826 |
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| RJ01 | Rejection of invention patent application after publication |