CN114278671A - Sliding type labyrinth seal single-acting mechanism of coring drilling tool - Google Patents
Sliding type labyrinth seal single-acting mechanism of coring drilling tool Download PDFInfo
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- CN114278671A CN114278671A CN202210213682.9A CN202210213682A CN114278671A CN 114278671 A CN114278671 A CN 114278671A CN 202210213682 A CN202210213682 A CN 202210213682A CN 114278671 A CN114278671 A CN 114278671A
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Abstract
The invention discloses a sliding type labyrinth seal single-action mechanism of a core drilling tool, which relates to the technical field of geological drilling and coring equipment and comprises a core pipe joint, wherein one end of the core pipe joint is used for being connected with a core pipe mechanism, the other end of the core pipe joint is provided with a mounting hole, the opening end of the mounting hole is fixedly and hermetically clamped with a single-action joint, a mandrel is movably arranged in the single-action joint in a penetrating way, and the two ends of the mandrel are respectively provided with a lower thrust bearing and an upper thrust bearing; the lower thrust bearing is positioned in the mounting hole, one end of the lower thrust bearing is abutted against the bottom of the single acting joint, and the other end of the lower thrust bearing is connected with the tail end of the mandrel through a first spring; one end of the upper thrust bearing is abutted with the top of the single acting joint, and the other end of the upper thrust bearing is abutted with a limiting block at the top of the mandrel through a labyrinth sealing structure; the bearing protection sliding sleeve of the labyrinth seal structure can move back and forth along the axial direction of the mandrel. The invention realizes the quick inspection of the easily damaged thrust bearing at the upper part of the single-action mechanism and the quick replacement of the bearing lubricating grease, and can effectively protect the upper thrust bearing and the lower thrust bearing.
Description
Technical Field
The invention relates to the technical field of geological drilling coring equipment, in particular to a sliding type labyrinth seal single-action mechanism of a coring drilling tool.
Background
In order to master underground geological conditions, real and reliable underground rock formation data are generally directly obtained by a drilling and coring mode, a coring drilling tool mainly comprises a single-action double-pipe coring drilling tool and a rope coring drilling tool, and the rope coring drilling tool is actually a special type of single-action double-pipe coring drilling tool. The drilling tools are all provided with single-action mechanisms, and the single-action mechanisms are mainly used for keeping a core barrel of the drilling tool static relative to a core, so that the abrasion of the core barrel to the core is reduced, and the core sampling quality is improved.
In addition, when complex strata such as loose stratum and broken stratum are cored and drilled, core blockage is easy to occur, namely, the core and a core barrel are blocked in the drilling process, so that the upper thrust bearing of the single-action mechanism is seriously stressed, and damage are easy to occur.
The design form of the existing single-action mechanism generally comprises the following three types: (1) the bearing is designed in a totally closed way; the bearing of the single-acting mechanism is designed in a totally closed mode, namely one or more sealing treatments are carried out between the upper thrust bearing and the lower thrust bearing and the mandrel, and flushing liquid and rock debris can be prevented from entering the interior of the single-acting mechanism. The problems that exist include: firstly, the sealing performance between the single-action mechanism and the mandrel is better, and the larger the rotation resistance between the single-action mechanism and the mandrel is, the single-action performance of the single-action mechanism can be influenced. The inspection of the single-action mechanism, particularly the inspection of the easily damaged thrust bearing, cannot carry out visual inspection, has more parts needing to be disassembled and assembled, and consumes long auxiliary time; if bearing lubricating grease needs to be replaced, all parts of the single-action mechanism also need to be disassembled, and the using efficiency of the drilling tool is low.
(2) The semi-closed design of the bearing; the easily damaged thrust bearing at the upper part of the semi-closed design of the bearing adopts a naked design, does not adopt the protection in the forms of sealing and the like, is easy to check, and generally adopts the thrust bearing with a dustproof cover; the lower thrust bearing adopts a closed design, so that the protection is relatively perfect. The problems that exist include: the easily damaged thrust bearing at the upper part is not effectively protected, is exposed in flushing fluid, has a severe use environment, mainly bears axial thrust when being jammed, and is very easy to damage.
(3) The bearing is designed in an open mode; flushing fluid and rock powder in the open design of the single-acting mechanism bearing can enter the upper thrust bearing and the lower thrust bearing of the single-acting mechanism, a sealing ring is not arranged between the single-acting mechanism and the mandrel, and the single-acting mechanism has small single-acting resistance and good effect. The problems that exist include: firstly, the inspection of single action mechanism, especially the inspection of fragile thrust bearing, the part that needs the dismouting is many, and complex operation consumes the assist time long, has influenced drilling tool availability factor. Secondly, solid-phase particles such as rock dust and rock debris enter the working space of the thrust bearing, the service life of the upper thrust bearing and the lower thrust bearing is seriously influenced, particularly the service life of the easily damaged thrust bearing, and the single-action mechanism is easy to rapidly lose efficacy.
The existing designs have certain defects, so that the actual requirements cannot be met; the practical engineering application provides objective technical requirements for the single-action mechanism of the core drill, so that the thrust bearing is effectively protected on the basis of ensuring the good single-action performance of the core drill, the inspection of the easily damaged thrust bearing at the upper part can be quickly finished, and the bearing can be timely replaced when a problem is found.
Disclosure of Invention
The invention aims to provide a sliding type labyrinth seal single-acting mechanism of a core drill, which aims to solve the problems in the prior art, realize the quick inspection of a vulnerable thrust bearing at the upper part of the single-acting mechanism and the quick replacement of bearing lubricating grease, and simultaneously effectively protect an upper thrust bearing and a lower thrust bearing.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a sliding type labyrinth seal single-action mechanism of a core drilling tool, which comprises a core pipe joint, wherein one end of the core pipe joint is used for being connected with a core pipe mechanism, the other end of the core pipe joint is provided with a mounting hole, the opening end of the mounting hole is fixedly, hermetically and fixedly clamped with a single-action joint, a mandrel is movably arranged in the single-action joint in a penetrating way, and a lower thrust bearing and an upper thrust bearing are respectively arranged at the two ends of the mandrel; the lower thrust bearing is positioned in the mounting hole, one end of the lower thrust bearing is abutted against the bottom of the single-action joint, and the other end of the lower thrust bearing is connected with the tail end of the mandrel through a first spring; one end of the upper thrust bearing is abutted with the top of the single acting joint, and the other end of the upper thrust bearing is abutted with a limiting block at the top of the mandrel through a labyrinth seal structure; the bearing protection sliding sleeve of the labyrinth seal structure can move back and forth along the axial direction of the mandrel.
Optionally, a first flange is annularly arranged on the outer wall of the single-acting joint; the labyrinth seal structure comprises a labyrinth seal cover with one end opened and the other end abutted with the limiting block; one end of the bearing protection sliding sleeve is arranged on the first flange in a sliding mode, and the other end of the bearing protection sliding sleeve can be inserted into the opening end of the labyrinth seal cover.
Optionally, an inner step of an annular structure is fixedly arranged on the inner wall of the bearing protection sliding sleeve, and the inner step is in sealing contact connection with the outer wall of the single acting joint through an O-shaped ring; one end of the upper thrust bearing, which is close to the single-action joint, can be abutted against the upper part of the inner step, and the other end of the upper thrust bearing is fixedly connected with the inner bottom wall of the opening end of the labyrinth seal cover through a gasket sleeved on the mandrel; the other end of the bearing protection sliding sleeve is inserted into the opening end of the labyrinth seal cover, and the part of the other end of the bearing protection sliding sleeve, which is inserted into the opening end of the labyrinth seal cover, is positioned between the inner wall of the labyrinth seal cover and the outer wall of the gasket.
Optionally, a second spring is sleeved on the single-action joint, one end of the second spring is abutted to the first flange, and the other end of the second spring is abutted to the inner step.
Optionally, a second flange is annularly arranged on the outer wall of the single acting joint, and one end of the second flange is abutted to the opening end of the installation hole of the core pipe joint.
Optionally, an annular groove is formed in the outer wall of the bearing protection sliding sleeve.
Optionally, the bottom of the spindle is in threaded connection with two flat nuts, and one end of the first spring, which is far away from the lower thrust bearing, is fixedly connected with the flat nuts through a spring washer and a flat washer.
Optionally, the clearance of the labyrinth seal structure and the inner space of the upper thrust bearing are filled with lubricating grease; and lubricating grease is filled in the closed cavity in which the lower thrust bearing is positioned.
Compared with the prior art, the invention has the following technical effects:
according to the invention, different types of sealing structure designs are respectively adopted according to the difference of the actual working conditions of the upper thrust bearing and the lower thrust bearing, so that the stable and reliable single-action performance of the single-action mechanism is realized, and the efficient and convenient use effect of the core drill is achieved. By adopting the sliding type labyrinth sealing mechanism, the sliding sleeve can be protected by axially moving the bearing, the easily damaged thrust bearing at the upper part is exposed, the quickly inspection of the easily damaged thrust bearing at the upper part is realized, meanwhile, the filling and the replacement of bearing lubricating grease are convenient, the operation is convenient, and the practicability is strong; the bearing protection sliding sleeve can be reset quickly under the action of spring force, and the stable labyrinth sealing state of the easily damaged thrust bearing at the upper part is kept. Secondly, to the fragile thrust bearing in upper portion, adopted labyrinth seal design, effectively prevented that flush fluid and detritus from getting into, guaranteed good bearing service behavior, improved bearing life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a sliding labyrinth seal single-acting mechanism of a core drill according to the present invention;
FIG. 2 is a partially enlarged schematic view of a labyrinth seal according to the present invention;
FIG. 3 is a schematic view of the inspection process at the upper thrust bearing of the present invention;
FIG. 4 is a schematic view of a single-acting joint structure according to the present invention;
FIG. 5 is a schematic view of the structure of the bearing protection sliding sleeve of the present invention;
the core drilling tool comprises a core drilling tool body, a sliding type labyrinth seal single-acting mechanism 100, a core pipe joint 1, a mounting hole 101, a single-acting joint 2, a first flange 201, a second flange 202, a mandrel 3, a limiting block 301, a bearing protection sliding sleeve 4, an inner step 401, an annular groove 402, a labyrinth seal cover 5, a gasket 6, a first spring 7, a second spring 8, a flat nut 9, a spring washer 10, a flat washer 11, a lower thrust bearing 12, an O-shaped ring 13, an upper thrust bearing 14 and lubricating grease 15, wherein the core drilling tool body is provided with a core drilling tool body, and the core drilling tool body is provided with a core drilling tool body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a sliding type labyrinth seal single-acting mechanism of a core drill, which aims to solve the problems in the prior art, realize the quick inspection of a vulnerable thrust bearing at the upper part of the single-acting mechanism and the quick replacement of bearing lubricating grease, and simultaneously effectively protect an upper thrust bearing and a lower thrust bearing.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 and 2, the invention provides a sliding labyrinth seal single-acting mechanism 100 of a core drill, which comprises a core tube joint 1, wherein one end of the core tube joint 1 is used for connecting a core tube mechanism, the other end of the core tube joint is provided with a mounting hole 101, the open end of the mounting hole 101 is fixedly sealed and clamped with a single-acting joint 2, a mandrel 3 is movably arranged in the single-acting joint 2 in a penetrating way, and two ends of the mandrel 3 are respectively provided with a lower thrust bearing 12 and an upper thrust bearing 14; the lower thrust bearing 12 is positioned in the mounting hole 101, one end of the lower thrust bearing 12 is abutted against the bottom of the single-action joint 2, the other end of the lower thrust bearing 12 is connected with the tail end of the mandrel 3 through a first spring 7, the bottom of the mandrel 3 is in threaded connection with two flat nuts 9, and one end, far away from the lower thrust bearing 12, of the first spring 7 is fixedly connected with the flat nuts 9 through a spring washer 10 and a flat washer 11; one end of the upper thrust bearing 14 is abutted with the top of the single acting joint 2, and the other end is abutted with a limiting block 301 at the top of the mandrel 3 through a labyrinth seal structure; the bearing protection sliding sleeve 4 of the labyrinth seal structure can reciprocate along the axial direction of the mandrel 3.
As shown in fig. 4, a first flange 201 is annularly arranged on the outer wall of the single-action joint 2; the labyrinth seal structure comprises a labyrinth seal cover 5 with one end opened and the other end abutted with the limiting block 301; one end of the bearing protection sliding sleeve 4 is slidably arranged on the first flange 201, and the other end can be inserted into the opening end of the labyrinth seal cover 5. As shown in fig. 5, an annular groove 402 is formed in the outer wall of the bearing protection sliding sleeve 4 to facilitate holding by an operator, an inner step 401 of an annular structure is fixedly arranged on the inner wall of the bearing protection sliding sleeve 4, and the inner step 401 is in sealing contact connection with the outer wall of the single acting joint 2 through an O-ring 13; one end of the upper thrust bearing 14 close to the single-action joint 2 can be abutted against the upper part of the inner step 401, and the other end of the upper thrust bearing 14 is fixedly connected with the inner bottom wall of the opening end of the labyrinth seal cover 5 through a gasket 6 sleeved on the mandrel 3; the other end of the bearing protection sliding sleeve 4 is inserted into the opening end of the labyrinth seal cover 5, and the part of the other end of the bearing protection sliding sleeve is positioned between the inner wall of the labyrinth seal cover 5 and the outer wall of the gasket 6. The single acting joint 2 is sleeved with a second spring 8, one end of the second spring 8 is abutted with the first flange 201, and the other end of the second spring 8 is abutted with the inner step 401. And a second flange 202 is annularly arranged on the outer wall of the single-action joint 2, and one end of the second flange 202 is abutted to the opening end of the installation hole 101 of the core pipe joint 1. The core tube mechanism, the core tube joint 1, the single-action joint 2, the bearing protection sliding sleeve 4, the second spring 8 and the O-shaped ring 13 form a stable whole, and the core tube mechanism is static relative to the core under the action of the upper thrust bearing and the lower thrust bearing; the upper part of the mandrel 3 is connected with a drilling tool outer pipe assembly, the mandrel 3, the labyrinth seal cover 5, the gasket 6, the first spring 7, the flat nut 9, the spring washer 10, the flat washer 11 and other parts rotate together with the outer pipe of the core drilling tool, the effective separation of rotary power is realized through a single-action mechanism, and the single-action function is realized.
In particular, the upper thrust bearing 14 is required to withstand the axial pressure of the drill, and therefore has a relatively short service life, which is a key point for protecting and inspecting the single-acting mechanism of the core drill. The invention adopts the labyrinth seal design for the upper thrust bearing 14, the labyrinth seal is composed of a bearing protection sliding sleeve 4, a labyrinth seal cover 5 and a gasket 6, the matching parts of all parts adopt small gaps, and lubricating grease 15 is filled in the gap space between the thrust bearing cavity and the labyrinth seal when in use. The parts of the labyrinth seal are in small clearance fit, so that flushing fluid and rock powder are effectively prevented from entering, and compared with an equal-shape seal type of a seal ring, the labyrinth seal has small rotation resistance and better single action performance; the annular gap of the labyrinth seal is opposite to the flowing direction of the flushing liquid, and the flushing liquid enters the upper thrust bearing and has pressure difference, so that the flushing liquid can be effectively resisted from entering; when the bearing is used, the labyrinth seal gap and the bearing inner space are filled with lubricating grease 15, firstly, lubrication is provided for bearing rotation, secondly, the space is filled, the labyrinth seal is matched to effectively resist impurities such as flushing fluid and rock powder to enter the upper thrust bearing, and the good use working condition of the bearing is ensured. Go up thrust bearing lower part design has O type circle, effectively prevents flush fluid and rock dust from the entering of last thrust bearing lower part gap, causes the bearing damage aggravation.
The lower thrust bearing 12 only needs to bear the weight of the core barrel mechanism, the requirement on the stress condition of the bearing is relatively low, the single-acting mechanism adopts a fully-closed sealing design, flushing fluid and rock powder are effectively prevented from entering, and the good working environment of the lower thrust bearing 12 is ensured. And bearing lubricating grease 15 is filled in the formed sealed cavity to lubricate the rotation of the bearing, so that the service life of the bearing is prolonged. The rotation effect of the single-action joint 2 is adjusted by the first spring 7, after the good single-action performance of the single-action joint 2 is determined, the compression amount of the first spring 7 is locked by the two flat nuts 9, and meanwhile, the nut looseness caused by the vibration of a drilling tool during core drilling is prevented.
In the design of the single-acting mechanism, the upper thrust bearing 14 is a main axial force bearing and a vulnerable thrust bearing, and is the core of the drill tool inspection after the drill is finished in the next drilling, and the lower thrust bearing 12 is small in stress, good in protection, long in service life and free of excessive inspection. A sliding type bearing rapid inspection mechanism is designed for the purpose. As shown in fig. 3, an annular groove 402 is designed on the outer side of the bearing protection sliding sleeve 4, during inspection, one hand holds the annular groove 402, the other hand holds the core barrel joint 1, the sliding bearing protection sliding sleeve 4 is moved downwards, the second spring 8 is further compressed, the upper thrust bearing 14 can be rapidly leaked out, the inspection of the bearing can be conveniently and intuitively completed, and the addition of bearing grease 15 is facilitated; after the operation is finished, the bearing protection sliding sleeve 4 automatically resets under the action of the elastic force of the second spring 8, and the labyrinth sealing state is kept.
The invention aims at the upper thrust bearing, adopts labyrinth seal, effectively solves the contradiction between the single-action performance and the seal existing in the single-action mechanism for a long time, realizes the reasonable and reliable seal and protection of the upper thrust bearing (the easily damaged thrust bearing), has stable single-action performance of the single-action mechanism, and prolongs the service life of the upper thrust bearing (the easily damaged thrust bearing); meanwhile, the quick and visual inspection of the upper thrust bearing (the easily damaged thrust bearing) is realized, the bearing lubricating grease is convenient to quickly fill and replace, the use of auxiliary time for assembling and disassembling the drilling tool is obviously reduced, and the use efficiency of the core drilling tool is effectively improved.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. The utility model provides a slidingtype labyrinth seal single action mechanism of coring drilling tool which characterized in that: the core tube joint is characterized by comprising a core tube joint, wherein one end of the core tube joint is used for being connected with a core tube mechanism, the other end of the core tube joint is provided with an installation hole, the opening end of the installation hole is fixedly, hermetically and fixedly clamped with a single-action joint, a mandrel is movably arranged in the single-action joint in a penetrating manner, and the two ends of the mandrel are respectively provided with a lower thrust bearing and an upper thrust bearing; the lower thrust bearing is positioned in the mounting hole, one end of the lower thrust bearing is abutted against the bottom of the single-action joint, and the other end of the lower thrust bearing is connected with the tail end of the mandrel through a first spring; one end of the upper thrust bearing is abutted with the top of the single acting joint, and the other end of the upper thrust bearing is abutted with a limiting block at the top of the mandrel through a labyrinth seal structure; the bearing protection sliding sleeve of the labyrinth seal structure can move back and forth along the axial direction of the mandrel.
2. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 1, characterized in that: a first flange is annularly arranged on the outer wall of the single-action joint; the labyrinth seal structure comprises a labyrinth seal cover with one end opened and the other end abutted with the limiting block; one end of the bearing protection sliding sleeve is arranged on the first flange in a sliding mode, and the other end of the bearing protection sliding sleeve can be inserted into the opening end of the labyrinth seal cover.
3. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 2, characterized in that: an inner step of an annular structure is fixedly arranged on the inner wall of the bearing protection sliding sleeve, and the inner step is in sealing contact connection with the outer wall of the single acting joint through an O-shaped ring; one end of the upper thrust bearing, which is close to the single-action joint, can be abutted against the upper part of the inner step, and the other end of the upper thrust bearing is fixedly connected with the inner bottom wall of the opening end of the labyrinth seal cover through a gasket sleeved on the mandrel; the other end of the bearing protection sliding sleeve is inserted into the opening end of the labyrinth seal cover, and the part of the other end of the bearing protection sliding sleeve, which is inserted into the opening end of the labyrinth seal cover, is positioned between the inner wall of the labyrinth seal cover and the outer wall of the gasket.
4. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 3, characterized in that: and a second spring is sleeved on the single-action joint, one end of the second spring is abutted to the first flange, and the other end of the second spring is abutted to the inner step.
5. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 2, characterized in that: and a second flange is annularly arranged on the outer wall of the single-action joint, and one end of the second flange is abutted to the opening end of the mounting hole of the core pipe joint.
6. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 1, characterized in that: an annular groove is formed in the outer wall of the bearing protection sliding sleeve.
7. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 1, characterized in that: the bottom of the mandrel is in threaded connection with two flat nuts, and one end, far away from the lower thrust bearing, of the first spring is fixedly connected with the flat nuts through a spring washer and a flat washer.
8. The sliding type labyrinth seal single acting mechanism of a core drill according to claim 3, characterized in that: lubricating grease is filled in the gap of the labyrinth seal structure and the inner space of the upper thrust bearing; and lubricating grease is filled in the closed cavity in which the lower thrust bearing is positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210213682.9A CN114278671B (en) | 2022-03-07 | 2022-03-07 | Sliding type labyrinth seal single-acting mechanism of coring drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210213682.9A CN114278671B (en) | 2022-03-07 | 2022-03-07 | Sliding type labyrinth seal single-acting mechanism of coring drilling tool |
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| CN114278671A true CN114278671A (en) | 2022-04-05 |
| CN114278671B CN114278671B (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210213682.9A Active CN114278671B (en) | 2022-03-07 | 2022-03-07 | Sliding type labyrinth seal single-acting mechanism of coring drilling tool |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659662A (en) * | 1969-04-25 | 1972-05-02 | Alsthom Cgee | Thrust bearings for underground drilling engines |
| GB1309350A (en) * | 1970-10-13 | 1973-03-07 | Alsthom Cgee | Labyrinth sealing devices for drilling turbines and to drilling turbines fitted therewith |
| US4458957A (en) * | 1979-03-09 | 1984-07-10 | Skf (U.K.) Limited | Labyrinth seals |
| CN2183460Y (en) * | 1994-04-07 | 1994-11-23 | 刘星海 | Movable centrifugal booster pump |
| CN101245856A (en) * | 2008-03-27 | 2008-08-20 | 济南东方天明机械有限公司 | Bearing sealing device |
| CN202300196U (en) * | 2012-04-16 | 2012-07-04 | 保定宏业石油物探机械制造有限责任公司 | Power head into which water and gas enter in radial direction |
| CN102619484A (en) * | 2012-04-11 | 2012-08-01 | 中国石油集团川庆钻探工程有限公司钻采工程技术研究院 | Well wall coring while drilling tool |
| CN103590771A (en) * | 2013-11-29 | 2014-02-19 | 无锡中地地质装备有限公司 | Novel internal single-action mechanism of drilling tool |
| CN110566151A (en) * | 2019-09-03 | 2019-12-13 | 辽宁省有色地质一〇一队有限责任公司 | Drill pipe floating sealing device |
-
2022
- 2022-03-07 CN CN202210213682.9A patent/CN114278671B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659662A (en) * | 1969-04-25 | 1972-05-02 | Alsthom Cgee | Thrust bearings for underground drilling engines |
| GB1309350A (en) * | 1970-10-13 | 1973-03-07 | Alsthom Cgee | Labyrinth sealing devices for drilling turbines and to drilling turbines fitted therewith |
| US4458957A (en) * | 1979-03-09 | 1984-07-10 | Skf (U.K.) Limited | Labyrinth seals |
| CN2183460Y (en) * | 1994-04-07 | 1994-11-23 | 刘星海 | Movable centrifugal booster pump |
| CN101245856A (en) * | 2008-03-27 | 2008-08-20 | 济南东方天明机械有限公司 | Bearing sealing device |
| CN102619484A (en) * | 2012-04-11 | 2012-08-01 | 中国石油集团川庆钻探工程有限公司钻采工程技术研究院 | Well wall coring while drilling tool |
| CN202300196U (en) * | 2012-04-16 | 2012-07-04 | 保定宏业石油物探机械制造有限责任公司 | Power head into which water and gas enter in radial direction |
| CN103590771A (en) * | 2013-11-29 | 2014-02-19 | 无锡中地地质装备有限公司 | Novel internal single-action mechanism of drilling tool |
| CN110566151A (en) * | 2019-09-03 | 2019-12-13 | 辽宁省有色地质一〇一队有限责任公司 | Drill pipe floating sealing device |
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| Publication number | Publication date |
|---|---|
| CN114278671B (en) | 2022-05-27 |
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