CN110080695B - Ultra-deep horizontal drilling equipment with centralizing function - Google Patents
Ultra-deep horizontal drilling equipment with centralizing function Download PDFInfo
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- CN110080695B CN110080695B CN201910474895.5A CN201910474895A CN110080695B CN 110080695 B CN110080695 B CN 110080695B CN 201910474895 A CN201910474895 A CN 201910474895A CN 110080695 B CN110080695 B CN 110080695B
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- adjusting
- rolling
- ultra
- horizontal drilling
- centralizer
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Abstract
The invention provides ultra-deep horizontal drilling equipment with a centering function, which comprises a drill rod, a drill bit fixedly connected to the tail end of the drill rod and a plurality of diameter-changing centralizers fixed on the drill rod, wherein each diameter-changing centralizer comprises a cylindrical mounting piece, a plurality of rolling pieces and an adjusting assembly, the rolling pieces are respectively and rotatably arranged outside the mounting piece through first rotating shafts, the adjusting assembly is adjustably arranged on the mounting piece and is used for controlling the rotating angle of the rolling pieces, the rolling pieces are circumferentially distributed around the central shaft of the mounting piece, and the first rotating shafts are respectively perpendicular to the central shaft of the mounting piece. The invention has the following beneficial effects: when horizontal drilling operation is carried out, a plurality of reducing centralizers are respectively installed on a drill rod, wherein the reducing centralizer closest to a drill bit is adjusted to be larger than other reducing centralizers in the size of the outer contour, when reducing is needed, the rolling part can be controlled to rotate through the first adjusting component, then the rolling part is unfolded or contracted, and finally the size of the outer contour of the reducing centralizer is enlarged or reduced.
Description
Technical Field
The invention relates to the field of horizontal drilling construction, in particular to ultra-deep horizontal drilling equipment with a centralizing function.
Background
In tunnels and underground works, it is often necessary to drill a borehole with a small diameter and a certain depth in the ground with a drilling machine, which operation is called drilling. The drilling operation generally includes vertical drilling and horizontal drilling, wherein in the long-distance horizontal drilling operation, due to the self-weight of the drill bit and the drill rod, the drilling track generates an error deviating from the design axis, namely, the front end of the drill bit generates downward deflection relative to the rear end of the drill rod, so that the drilling track generates downward inclination, and therefore, a plurality of centralizers are required to be arranged on the drill rod to adjust the elevation angle of the drill bit.
Therefore, patent document No. CN105735896A discloses a method for constructing ultra-deep horizontal drilling by using a centralizer group, which is based on the conventional drilling method, wherein at least 1 rear end centralizer is additionally arranged on a rear drill rod of a front end centralizer to form a centralizer group together with the front end centralizer, the rear end centralizer and the front end centralizer are arranged at intervals, the outer diameter of the rear end centralizer is smaller than that of the front end centralizer to reduce the jumping amount of the drill rod and the drill bit in the hole, the downwarping amount generated by the drill rod between the drill bit and the front end centralizer is balanced by using the gravity action of the rear end centralizer, the axial line of the front end drill bit is kept to be matched with the designed axial line to the maximum extent, the ultra-deep hole drilling error is reduced, and the construction precision requirement is met. However, the existing centralizer generally comprises a hard centralizer and a soft centralizer, wherein the hard centralizer has the biggest disadvantage that the size cannot be adjusted, so that at least one type of centralizer with a large size and one type of centralizer with a small size are required to be adopted according to corresponding aperture every time the hard centralizer is used for carrying out ultra-deep horizontal drilling operation, and if a plurality of horizontal well bores with different apertures are required to be continuously constructed, more types of centralizers are required to be prepared, thereby bringing great inconvenience to equipment transportation and operation management; and soft centralizer is sheet structure mostly, and its weight is less on the one hand, can't effectively play counter weight balance effect, and on the other hand it can adjust self size according to the aperture, but when super dark horizontal drilling operation, the gravity influence that drill bit and drilling rod received is very obvious to soft centralizer's soft structure can't carry out effectual support to it, finally still can lead to drilling rod and drill bit skew axis, consequently current soft centralizer also can't apply to horizontal drilling operation effectively.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides ultra-deep horizontal drilling equipment with a centering function, which solves the problem that the transportation and management are inconvenient when the existing hard centering device is adopted to construct ultra-deep horizontal drilling, and the problem that the drilling track deviates from the preset axis when the existing soft centering device is adopted to construct ultra-deep horizontal drilling.
In order to achieve the purpose, the invention adopts the following technical scheme:
ultra-deep horizontal drilling equipment with righting function, including drilling rod, rigid coupling in the terminal drill bit of drilling rod and be fixed in a plurality of reducing centralizer on the drilling rod, wherein:
the reducing centralizer comprises a cylindrical mounting part, a plurality of rolling pieces and an adjusting assembly, wherein the rolling pieces are rotatably arranged outside the mounting part through first rotating shafts respectively, the adjusting assembly is adjustably arranged on the mounting part and used for controlling the rotating angle of the rolling pieces, the rolling pieces are circumferentially distributed around the central shaft of the mounting part, and the first rotating shafts are perpendicular to the central shaft of the mounting part respectively; the outer wall of the mounting piece is coaxially and fixedly provided with a circle of annular protruding portion, the outer wall of the protruding portion is provided with external threads, and the adjusting assembly and the protruding portion are connected through threads to achieve that the adjusting assembly can be adjusted along the axial direction of the mounting piece.
The adjusting part comprises an adjusting part, a plurality of connecting parts and a plurality of rolling parts, wherein the adjusting part is connected to the boss in a threaded manner, the outer wall of the adjusting part is provided with a round annular limiting groove, the limiting ring is rotatably installed in the limiting groove, and the connecting parts are hinged to the limiting ring through a second rotating shaft.
Compared with the prior art, the invention has the following beneficial effects: when the diameter is required to be changed, the rolling part can be controlled to rotate through the first adjusting assembly, so that the rolling part is expanded or contracted, and finally the size of the outer contour of the diameter-changing centralizer is increased or reduced; when horizontal drilling operation is carried out, a plurality of reducing centralizers are respectively arranged on a drill rod, wherein the reducing centralizer closest to a drill bit is adjusted to have the outer contour dimension larger than that of other reducing centralizers; therefore, when horizontal drilling operation is carried out, centralizers of various types do not need to be prepared, great convenience is brought to transportation management and the like, and meanwhile, the horizontal drilling machine is low in manufacturing cost and convenient to operate, and has a good market popularization prospect.
Drawings
Fig. 1 is a schematic side view of the present invention.
Fig. 2 is a partially enlarged view of a portion a of fig. 1.
Fig. 3 is a sectional view taken along line B of fig. 1.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the embodiments.
As shown in fig. 1, the present invention provides an ultra-deep horizontal drilling apparatus with a centering function, comprising a drill rod 10, a drill bit 11 fixedly connected to the end of the drill rod 10, and a plurality of variable diameter centering devices fixed on the drill rod 10, wherein:
the reducing centralizer comprises a cylindrical mounting part 20, a plurality of rolling members 30 which are rotatably arranged outside the mounting part 20 through first rotating shafts 90 respectively, and an adjusting assembly which is adjustably arranged on the mounting part 20 and is used for controlling the rotating angle of the rolling members 30, wherein the rolling members 30 are distributed circumferentially around the central shaft of the mounting part 20, and the first rotating shafts 90 are perpendicular to the central shaft of the mounting part 20 respectively;
specifically, a circle of annular protruding portions 21 are coaxially and fixedly arranged on the outer wall of the mounting piece 20, external threads are arranged on the outer wall of each protruding portion 21, and the protruding portions 21 and the mounting piece 20 can be of an integrated structure or a welded split structure;
the adjusting assembly and the boss 21 are connected through threads, so that the adjusting assembly can be adjusted along the axial direction of the mounting part 20, specifically, the adjusting assembly comprises an adjusting part which is connected on the boss 21 through threads and provided with a circle of annular limiting groove 41 on the outer wall, a limiting ring 42 which is rotatably installed in the limiting groove 41, and a plurality of connecting parts 43 which are hinged on the limiting ring 42 through a second rotating shaft 91, the number of the connecting parts 43 is equal to that of the rolling members 30, and the plurality of the connecting parts 43 and the plurality of the rolling members 30 are correspondingly hinged one by one through third rotating shafts 92; the adjusting part comprises a first adjusting sleeve 40 with internal threads and a second adjusting sleeve 44 in threaded connection with one end of the first adjusting sleeve 40, the inner diameter of the first adjusting sleeve 40 is larger than the outer diameter of the drill rod 10 and is in threaded connection with the boss 21, the second adjusting sleeve 44 comprises a sleeve body 441 with the outer diameter smaller than the outer diameter of the first adjusting sleeve 40 and a ring-shaped limiting part 442 fixedly arranged on the outer wall of the sleeve body 441, the limiting groove 41 is formed by surrounding among the end part of the limiting part 442, the outer surface of the sleeve body 441 and the end part of the first adjusting sleeve 40, and the inner diameter of the sleeve body 441 is larger than the outer diameter of the drill rod 10; preferably, a ring-shaped blocking part 45 is fixedly connected to one end of the first adjusting sleeve 40 away from the second adjusting sleeve 44;
the rolling member 30 comprises a support member 301 and a plurality of universal balls 302 screwed on the support member 301, two end portions of the support member 301 in the axial direction of the drill rod 10 are provided with inclined surfaces 303, and the universal balls 302 are mounted on the inclined surfaces 303 so as to ensure that the rolling member 30 can be in contact with the hole wall of the drilled hole through the universal balls when rotating for a certain angle.
As shown in fig. 2 and 3, a plurality of groups of support arms 22 with first hinge holes are fixedly connected to the outer wall of the mounting member 20, preferably, two support arms 22 are provided for each group, and the first hinge holes are coaxially arranged, two first lifting lugs 304 with second hinge holes are symmetrically provided at the bottom center of the supporting member 301, and the support arms 22 and the first lifting lugs 304 are hinged through the first rotating shaft 90; one end of the bottom of the supporting member 301 is further provided with a pair of second lifting lugs 305 having third hinge holes, the limiting ring 42 is provided with a plurality of pairs of third lifting lugs 421 having fourth hinge holes, the connecting portion 43 is a strip-shaped member, and fifth hinge holes are respectively formed in two ends of the connecting portion 43, so that the connecting portion 43 is hinged to the third lifting lugs 421 and the second lifting lugs 305 through the second rotating shaft 91 and the third rotating shaft 92.
As shown in fig. 1 and 2, when horizontal drilling is performed, a plurality of reducing centralizers are respectively fastened on a drill rod 10 through bolts, wherein the reducing centralizer at the front end closest to a drill bit 11 is adjusted to have an outer profile size larger than that of other reducing centralizers, and the specific process of diameter increase is that the adjusting part is rotated to enable the adjusting part to axially move along an installation part 20 under the action of a thread structure, because a limiting ring 42 is rotatably limited in a limiting groove 41, the limiting ring 42 can also synchronously translate, and meanwhile, the limiting ring 42 controls a rolling part 30 to rotate by taking a first rotating shaft 90 as a fulcrum through a connecting part 43, so that one end of the rolling part 30 tilts and adapts to the aperture of the drilled hole to ensure that a plurality of rolling parts 30 can contact the hole wall of the drilled hole, that is ensured that the drill rod 10 is always positioned at the central axis of the drilled hole; the rear end centralizer does not need to be subjected to diameter changing, the drill rod 10 at the rear end is pressed downwards under the balance action of the balance weight, the front end drill bit 11 can be prevented from upwarping, the front end drill bit 11 is guaranteed to advance horizontally all the time, and the drilling track is guaranteed not to deflect.
In the invention, the mounting member 20, the first adjusting sleeve 40, the second adjusting sleeve 44, the blocking portion 45, the limiting ring 42 and the like can be made of metal tubes by turning, milling and other processes, and the supporting member 301 can be made of metal plates by turning an inclined plane, bending into a certain radian, milling a screw hole and other processes in sequence, so that the effective counterweight effect is ensured.
Finally, the above embodiments are merely illustrative and not restrictive, and it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is to be covered by the claims.
Claims (5)
1. Ultra-deep horizontal drilling equipment with righting function, its characterized in that includes drilling rod, rigid coupling in the terminal drill bit of drilling rod and be fixed in a plurality of reducing centralizer on the drilling rod, wherein:
the reducing centralizer comprises a cylindrical mounting part, a plurality of rolling pieces and an adjusting assembly, wherein the rolling pieces are rotatably arranged outside the mounting part through first rotating shafts respectively, the adjusting assembly is adjustably arranged on the mounting part and used for controlling the rotating angle of the rolling pieces, the rolling pieces are circumferentially distributed around the central shaft of the mounting part, and the first rotating shafts are perpendicular to the central shaft of the mounting part respectively;
the outer wall of the mounting piece is coaxially and fixedly provided with a circle of annular protruding part, the outer wall of the protruding part is provided with external threads, and the adjusting assembly and the protruding part are connected through threads to realize that the adjusting assembly can be adjusted along the axial direction of the mounting piece;
the adjusting part comprises an adjusting part, a plurality of connecting parts and a plurality of rolling parts, wherein the adjusting part is connected to the boss in a threaded manner, the outer wall of the adjusting part is provided with a round annular limiting groove, the limiting ring is rotatably installed in the limiting groove, and the connecting parts are hinged to the limiting ring through a second rotating shaft.
2. The ultra-deep horizontal drilling apparatus with a centralizing function according to claim 1, characterized in that: the regulating part is including the second adjusting collar that has internal screw thread first adjusting collar and threaded connection in first adjusting collar one end, the internal diameter of first adjusting collar be greater than the drilling rod external diameter and with boss threaded connection, the second adjusting collar includes that the external diameter is less than the cover body of first adjusting collar external diameter and sets firmly in the annular spacing portion of the round of set external wall, just surround between spacing portion tip, the external surface of cover and the first adjusting collar tip and form the spacing groove, the internal diameter of the cover body is greater than the external diameter of drilling rod.
3. The ultra-deep horizontal drilling apparatus with a centralizing function according to claim 2, characterized in that: and one end of the first adjusting sleeve, which is far away from the second adjusting sleeve, is fixedly connected with a ring-shaped blocking part.
4. The ultra-deep horizontal drilling apparatus with a centralizing function according to claim 1, characterized in that: the rolling member includes a support member and a plurality of ball transfer units threadedly coupled to the support member.
5. The ultra-deep horizontal drilling apparatus with a centralizing function according to claim 4, characterized in that: inclined planes are arranged at two end parts of the support piece along the axial direction of the drill rod, and universal balls are arranged on the inclined planes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474895.5A CN110080695B (en) | 2019-06-03 | 2019-06-03 | Ultra-deep horizontal drilling equipment with centralizing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474895.5A CN110080695B (en) | 2019-06-03 | 2019-06-03 | Ultra-deep horizontal drilling equipment with centralizing function |
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| CN110080695A CN110080695A (en) | 2019-08-02 |
| CN110080695B true CN110080695B (en) | 2020-07-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905522A (en) * | 2019-10-24 | 2020-03-24 | 李军 | Well drilling machine |
| CN114016909B (en) * | 2021-09-30 | 2023-12-01 | 北京中煤矿山工程有限公司 | Drill bit centering device for construction long-distance horizontal drilling |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557327A (en) * | 1983-09-12 | 1985-12-10 | J. C. Kinley Company | Roller arm centralizer |
| US8082988B2 (en) * | 2007-01-16 | 2011-12-27 | Weatherford/Lamb, Inc. | Apparatus and method for stabilization of downhole tools |
| US8910720B2 (en) * | 2009-06-22 | 2014-12-16 | Schlumberger Technology Corporation | Downhole tool with roller screw assembly |
| US9784047B2 (en) * | 2013-06-27 | 2017-10-10 | Weatherford Technology Holdings, Llc | Extendable and retractable stabilizer |
| CN103556957B (en) * | 2013-11-19 | 2015-07-15 | 西南石油大学 | Large changing diameter well drilling coal mining drill stem stabilizer |
| CN204002617U (en) * | 2014-01-14 | 2014-12-10 | 河南理工大学 | Coal bed gas well bias-wearing-proof apparatus of pumping rod |
| CN206418975U (en) * | 2017-01-10 | 2017-08-18 | 北京华航无线电测量研究所 | A kind of compact rolling wheel centralizer |
| CN109458140B (en) * | 2018-08-21 | 2020-08-28 | 王少斌 | Multi-arm pushing structure capable of controlling independent stretching |
| CN109138862B (en) * | 2018-09-28 | 2020-01-03 | 西南石油大学 | Motor-driven adjustable centralizer |
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Inventor after: Xin Guoping Inventor after: Zhu Jianwei Inventor after: Chen Jianguo Inventor after: Liu Longwei Inventor after: Zhang Wenming Inventor after: Hu Baosheng Inventor after: Chen Haifeng Inventor after: Li Chunhui Inventor after: Xie Luyong Inventor before: Xin Guoping Inventor before: Xin Yijin Inventor before: Chen Jianguo Inventor before: Liu Longwei Inventor before: Zhang Wenming Inventor before: Hu Baosheng Inventor before: Chen Haifeng Inventor before: Li Chunhui |
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