CN213743223U - Anti-tripping motor assembly of screw drill - Google Patents
Anti-tripping motor assembly of screw drill Download PDFInfo
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- CN213743223U CN213743223U CN202022733227.0U CN202022733227U CN213743223U CN 213743223 U CN213743223 U CN 213743223U CN 202022733227 U CN202022733227 U CN 202022733227U CN 213743223 U CN213743223 U CN 213743223U
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Abstract
The embodiment of the utility model discloses screw drill utensil prevents moving back and detains motor assembly, including actuating mechanism, rotor and the connecting rod connected in order, just actuating mechanism's pivot axis with the at least partial axis of connecting rod is on same straight line, actuating mechanism's pivot axis with be formed with the eccentricity between the axis of rotor. The utility model discloses a rotor and the cooperation of connecting rod are connected to with actuating mechanism's pivot axis with form the eccentricity between the axis of rotor, thereby realize rotating and vibrate the in-process, because the existence of eccentric power makes and forms radial force between connecting rod and the rotor, thereby changes the atress direction of junction, makes under high-frequency vibration's environment, borrows the inseparable locking that borrows radial thrust and realize the two, and fundamentally solves the problem that drops between the two.
Description
Technical Field
The embodiment of the utility model provides a part structure field that relates to the screw rod drilling tool, concretely relates to screw rod drilling tool prevents moving back and detains motor assembly.
Background
The screw drilling tool is a positive displacement downhole power drilling tool which takes drilling fluid as a power source and converts liquid pressure energy into mechanical energy. When slurry pumped by the slurry pump flows through the bypass valve and enters the motor, a certain pressure difference is formed between the inlet and the outlet of the motor, the rotor is pushed to rotate around the axis of the stator, and the rotating speed and the torque are transmitted to the drill bit through the universal shaft and the transmission shaft, so that the drilling operation is realized. The screw rod drilling tool is used as a downhole power drilling tool which is most widely used in petroleum exploration and development at present, is mainly used for deflecting and twisting azimuth construction of directional wells and horizontal wells, and one part of the screw rod drilling tool is also used in drilling/workover operations of special process wells.
In the drilling construction process, the drill bit is connected to the transmission shaft lower extreme of screw rod drilling tool, meet special rock stratum or under complicated operating mode at the drill bit, the drill bit atress changes greatly, the screw rod drilling tool bears alternating load, the atress is complicated, when the screw rod drilling tool produces torsion too big or the pump pressure risees suddenly, unusual incident such as shell body connecting thread dropout easily takes place, can stimulate inside rotor position to fall down after the shell body drops off, cause the tip spare to fall into the shaft bottom under the dropout, if guarantee that the drilling operation continues under such a situation, must salvage the well part, this will influence the normal progress of drilling construction, take a lot of work and time, cause serious economic loss.
In order to solve the problem, the anti-falling structure is designed and optimized from the structural forms of an anti-falling nut, an anti-falling sleeve and an anti-falling short section in the prior industry, the connection mode of a rotor and an anti-falling connecting rod is omitted in such a mode, and the anti-falling connecting rod and the rotor are locked by an external tool according to a certain pretightening force. In the process of high-frequency vibration in underground operation, the connection thread is easy to loosen and release, so that the anti-falling effect is lost in advance; and because the anti-drop connecting rod is welded with the rotor in a welding mode after the threaded connection, the underground hydrogen sulfide gas and the welded junction are easy to react during underground operation, so that the welded junction is brittle and has failure hidden trouble.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a screw drill utensil is prevented moving back and is detained motor assembly is connected through the cooperation of rotor and connecting rod, and form the eccentricity between the axis with pivoted pivot axis and rotor, thereby realize rotating and vibrate the in-process, because the existence of eccentric force, make and form radial force between connecting rod and the rotor, thereby change the atress direction of junction, make under high-frequency vibration's environment, borrow radial thrust and realize the inseparable locking of the two, fundamentally solves the problem of droing between the two.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the embodiment of the utility model provides an aspect provides a screw drill utensil prevents moving back and detains motor assembly, including actuating mechanism, rotor and the connecting rod that connects in order, just actuating mechanism's pivot axis with at least partial axis of connecting rod is on same straight line, actuating mechanism's pivot axis with be formed with the eccentricity between the axis of rotor.
As an optimized scheme of the utility model, orientation in the rotor the terminal surface of connecting rod is inwards sunken to be formed with the through-hole that at least part formed into the round platform shape, orientation in the connecting rod the one end of rotor be formed with the at least partial spiro union's of through-hole linkage segment.
As a preferred scheme of the utility model, the through-hole includes from terminal surface inwards the round platform section and the cylinder section that form in order, just the round platform section reduces from terminal surface inside sectional area.
As a preferred scheme of the utility model, the terminal surface of rotor outwards extends and is formed with backstop portion, just backstop portion includes at least along the contact segment that radial direction extends, and certainly the lateral surface orientation of contact segment the backstop section that the connecting rod extends, just the backstop section encloses the part at least the lateral surface of connecting rod.
As a preferred scheme of the utility model, the cylinder section is formed with the internal thread, the linkage segment include with the first grafting portion of cylinder section cooperation spiro union, and with the second grafting portion that the round platform section cooperation cup jointed, just the axis of second grafting portion with actuating mechanism's pivot axis is on same straight line, the axis of first grafting portion with the axis of rotor is on same straight line.
As a preferred scheme of the utility model, the inner wall of round platform section forms to the smooth surface, the second grafting portion with be formed with the clearance between the smooth surface, just be close to in the second grafting portion the side of the eccentric one side of first grafting portion is formed with a plurality of spheroid archs.
As a preferred scheme of the utility model, the length ratio of the circular platform section to the cylinder section along the extending direction of the axis of the through hole is 1: 5-10.
As an optimal scheme of the utility model, keep away from in the connecting rod the one end of rotor is connected with the drill bit through baffle and the nut of connecting in order.
As an optimized scheme of the utility model, the rotor with the stator and the nipple joint of connecting in order have been cup jointed in the outside of connecting rod.
As a preferred embodiment of the present invention, the rotor is in line contact with the connecting rod.
The utility model discloses an embodiment has following advantage:
1) in the connecting and rotating process of the connecting rod and the rotor, under the action of the eccentricity, the connecting rod and the rotor are in interference fit at the connecting part, so that a radial thrust is generated, the connecting rod and the rotor are tightly locked, and the connecting rod and the rotor are prevented from falling off;
2) because the existence of this radial force for the atress direction of junction has changed, in being in the high frequency vibration environment of borehole operation, can further change the direction of the vibrations direction that receives axially through connection structure, further realize preventing the effect of dropout back-off.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic structural view of an anti-tripping motor assembly of a screw drill according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a schematic structural diagram of a rotor according to an embodiment of the present invention;
fig. 4 is a partially enlarged view of a portion B in fig. 3.
In the figure:
1-short section; 2-a nut; 3-a baffle plate; 4-a connecting rod; 5-a rotor; 6-a stator; 7-a drive mechanism; 8-a through hole; 9-a stop.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-4, the utility model provides a screw drill utensil prevents moving back and detains motor assembly, including actuating mechanism 7, rotor 5 and the connecting rod 4 that connects in order, just actuating mechanism 7's pivot axis with at least partial axis of connecting rod 4 is on same straight line, actuating mechanism 7's pivot axis with be formed with the eccentricity between the axis of rotor 5.
Of course, the connection between the rotor 5 and the connecting rod 4 here may further be a threaded connection, so that the connection of the circular truncated cone is an interference fit under the action of the eccentricity by the threaded connection, thereby further ensuring that the generated radial thrust tightly locks the rotor 5 and the connecting rod 4 together by the threads; meanwhile, due to the existence of radial force, the stress direction of the threaded connection part can be further changed, and the stress direction during thread back-off is changed under the operation environment of underground high-frequency vibration, so that the effect of preventing the thread from back-off is further achieved.
Meanwhile, the whole structure starts from the structure of the joint between the rotor 5 and the connecting rod 4, and an additional structure is not adopted, so that the anti-falling structure is safer and more reliable, the design and use cost is reduced, the safe use of the screw drilling tool in the underground is ensured, the smooth drilling operation is ensured, the well building period can be effectively shortened on the basis, and the drilling cost is saved.
In a further preferred embodiment, a through hole 8 at least partially formed in a truncated cone shape is formed in the rotor 5 in a manner of being recessed inwards towards the end surface of the connecting rod 4, and a connecting section at least partially screwed with the through hole 8 is formed in one end of the connecting rod 4 towards the rotor 5. The effective matching of the joint of the through hole 8 and the connecting section is completed through the corresponding arrangement of the through hole and the connecting section.
In a more preferred embodiment, in order to enable the rotor 5 and the connecting rod 4 to be tightly fitted with each other by further increasing the eccentric force while achieving effective connection therebetween, the through hole 8 includes a circular truncated cone section and a cylindrical section sequentially formed from the end face inwards, and the circular truncated cone section has a decreasing sectional area from the end face inwards. By adopting the mode, on the basis of mainly utilizing the interference fit between the circular table section and the connecting rod 4, the cylindrical section is further tightly connected between the rotors 5 through the eccentric force generated in the rotating process, and the connection tightness between the circular table section and the connecting rod is further improved through the cylindrical section.
Meanwhile, in a more preferred embodiment, a stop portion 9 is formed by extending an end surface of the rotor 5 outward, and the stop portion 9 at least includes a contact section extending in a radial direction and a stop section extending from an outer side surface of the contact section toward the connecting rod 4, and the stop section at least partially encloses the outer side surface of the connecting rod 4. The further arrangement of the stopping part 9 can enable the connecting rod 4 to exert an inward radial force on the rotor 5 through the outer side surface of the stopping connecting rod 4 even if the eccentric force of the connecting rod 4 and the rotor 5 rotate relatively outwards, so that the tolerance band of the interference fit of the stopping connecting rod 4 and the rotor 5 is further improved, the size is large, and the tight connection between the stopping connecting rod 4 and the rotor 5 can be further realized on the basis of realizing the interference fit of the stopping connecting rod 4 and the rotor on the premise that the eccentric force of the connecting rod is larger.
In a more preferred embodiment, the cylindrical section is formed with an internal thread, the connecting section includes a first inserting portion engaged with the cylindrical section, and a second inserting portion engaged with the circular truncated cone section, and a central axis of the second inserting portion and a central axis of the driving mechanism 7 are on the same straight line, and a central axis of the first inserting portion and a central axis of the rotor 5 are on the same straight line. This arrangement makes the entire connecting rod 4 rotate in its entirety, and, owing to the eccentric arrangement of the connecting segments, a better fit connection with the rotor 5 and a better provision of eccentric forces can also be achieved.
Meanwhile, in a further preferred embodiment, the inner wall of the circular truncated cone section is formed into a smooth surface, a gap is formed between the second inserting part and the smooth surface, and a plurality of spherical protrusions are formed on the side surface of the second inserting part close to the eccentric side of the first inserting part.
Such a mode of setting has realized the both zonulae occludens of cylinder section and connecting rod 4 promptly, and passes through the bellied further setting of spheroid at the round platform section for its weight of keeping away from pivot axis one side further increases, and under the condition that the eccentricity exists, the rotation can further drive connecting rod 4 and increase outside radial eccentric force, thereby realizes the interference fit between connecting rod 4 and rotor 5 better. Although a part of the connecting section between the two is lost in the arrangement mode, the tight connection degree of the connecting part of the circular platform section can be further driven by the increase of the eccentric force, the matching between the two can be better realized, the tight matching between the two can not be realized simply by the connection, and the arrangement mode is better adapted to the arrangement of the eccentric distance and the application of the eccentric force.
Of course, the distance of the eccentricity can be set according to the actual situation, for example, 1/10-1/20 of the length of the connecting rod 4 in the radial direction.
In a more preferred embodiment of the present invention, the ratio of the length of the circular truncated cone section to the length of the cylindrical section in the extending direction of the axis of the through hole 8 is 1: 5-10.
In a more preferred embodiment, a drill bit is connected to one end of the connecting rod 4 far away from the rotor 5 through a baffle 3 and a nut 2 which are connected in sequence.
Simultaneously, in order to guarantee the stability of stator 6 to carry out further protection to connecting rod 4, baffle 3 and nut 2, avoid appearing damaging the scheduling problem when borehole operation, be connected with nipple joint 1 on stator 6, nipple joint 1 cup joints in at least part connecting rod 4 baffle 3 with the outside of nut 2. Of course, the stator 6 and the nipple 1 may be connected in series, and further may be connected by a screw thread.
In a more preferred embodiment, the connection between the rotor 5 and the connecting rod 4 is a line contact.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a screw drill utensil is prevented moving back and is detained motor assembly which characterized in that, includes actuating mechanism (7), rotor (5) and connecting rod (4) that connect in order, just the pivot axis of actuating mechanism (7) with at least partial axis of connecting rod (4) is on same straight line, the pivot axis of actuating mechanism (7) with be formed with the eccentricity between the axis of rotor (5).
2. The screw drill tool anti-unscrewing motor assembly as claimed in claim 1, characterized in that the end face of the rotor (5) facing the connecting rod (4) is recessed inwards to form a through hole (8) formed at least partially in a truncated cone shape, and the end of the connecting rod (4) facing the rotor (5) is formed with a connecting section at least partially screwed with the through hole (8).
3. The anti-unscrewing motor assembly for a screw drill as claimed in claim 2, wherein the through-hole (8) comprises a circular truncated cone section and a cylindrical section formed in sequence from the end face inwards, and the circular truncated cone section decreases in cross-sectional area from the end face inwards.
4. The screw drill tool anti-back-out motor assembly according to claim 3, wherein the end face of the rotor (5) extends outwards to form a stop portion (9), and the stop portion (9) at least comprises a contact section extending along the radial direction and a stop section extending from the outer side face of the contact section towards the connecting rod (4), and the stop section at least partially encloses the outer side face of the connecting rod (4).
5. The screw drill tool anti-unscrewing motor assembly as claimed in claim 3, wherein the cylindrical section is formed with an internal thread, the connecting section comprises a first inserting portion in matching threaded connection with the cylindrical section and a second inserting portion in matching sleeved connection with the circular truncated cone section, a central axis of the second inserting portion is collinear with a rotating shaft axis of the driving mechanism (7), and a central axis of the first inserting portion is collinear with a central axis of the rotor (5).
6. The anti-unscrewing motor assembly as claimed in claim 5, wherein the inner wall of the circular truncated cone section is formed as a smooth surface, a gap is formed between the second spigot portion and the smooth surface, and a plurality of spherical projections are formed on the side surface of the second spigot portion adjacent to the eccentric side of the first spigot portion.
7. The anti-unscrewing motor assembly for a screw drill according to claim 3, characterized in that the ratio of the length of the circular truncated cone segment to the length of the cylindrical segment in the direction of extension of the axis of the through-hole (8) is 1: 5-10.
8. The screw drill tool anti-unscrewing motor assembly as claimed in claim 1 or 2, characterised in that the end of the connecting rod (4) remote from the rotor (5) is connected to a drill bit by a baffle (3) and a nut (2) connected in series.
9. The anti-back-off motor assembly of the screw drill tool is characterized in that a stator (6) and a short joint (1) which are connected in sequence are sleeved outside the rotor (5) and the connecting rod (4).
10. The anti-unscrewing motor assembly for a screw drill according to claim 1, characterized in that the connection between the rotor (5) and the connecting rod (4) is a line contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022733227.0U CN213743223U (en) | 2020-11-24 | 2020-11-24 | Anti-tripping motor assembly of screw drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022733227.0U CN213743223U (en) | 2020-11-24 | 2020-11-24 | Anti-tripping motor assembly of screw drill |
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| Publication Number | Publication Date |
|---|---|
| CN213743223U true CN213743223U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022733227.0U Active CN213743223U (en) | 2020-11-24 | 2020-11-24 | Anti-tripping motor assembly of screw drill |
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| CN (1) | CN213743223U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267823A (en) * | 2020-11-24 | 2021-01-26 | 中国石油天然气集团有限公司 | Anti-tripping motor assembly of screw drill |
| CN113818811A (en) * | 2021-10-18 | 2021-12-21 | 江苏华亚石油机械制造有限公司 | Wear-resistant and erosion-resistant screw drilling tool for oil shale in-situ mining and machining process |
-
2020
- 2020-11-24 CN CN202022733227.0U patent/CN213743223U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267823A (en) * | 2020-11-24 | 2021-01-26 | 中国石油天然气集团有限公司 | Anti-tripping motor assembly of screw drill |
| CN113818811A (en) * | 2021-10-18 | 2021-12-21 | 江苏华亚石油机械制造有限公司 | Wear-resistant and erosion-resistant screw drilling tool for oil shale in-situ mining and machining process |
| CN113818811B (en) * | 2021-10-18 | 2023-11-21 | 江苏华亚石油机械制造有限公司 | Wear-resistant corrosion-resistant screw drilling tool for oil shale in-situ exploitation and processing technology |
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