阅读说明：本技术 用于bh-vdt工具外挂铰链式主动缩回推靠机构 (External hinge type active retraction pushing mechanism for BH-VDT tool ) 是由 黄峰 汝大军 杨春 陈世春 黄健 马哲 魏庆振 刘郅轩 张雅静 康建涛 张长春 于 2020-07-14 设计创作，主要内容包括：本发明涉及用于BH-VDT工具外挂铰链式主动缩回推靠机构,包括工具本体、铰链式导向块、第一固定块、第二固定块、弹性舌板,第一固定块上设有安装槽,铰链式导向块与第一固定块之间转动连接；第二固定块一侧设有异形槽,弹性舌板一端安装在异形槽内,铰链式导向块底部另一端设有异形孔,弹性舌板伸出异形槽的部分插入异形孔,第二固定块上设有至少一个柱塞,可通过柱塞伸出推动铰链式导向块相较于第一固定块转动,当柱塞缩回时,弹性舌板可带动铰链式导向块恢复原位。本发明能大大减少工具起下钻遭遇阻卡风险。(The invention relates to an externally hung hinge type active retraction pushing mechanism for a BH-VDT tool, which comprises a tool body, a hinge type guide block, a first fixed block, a second fixed block and an elastic tongue plate, wherein the first fixed block is provided with a mounting groove, and the hinge type guide block is rotationally connected with the first fixed block; one side of the second fixed block is provided with a special-shaped groove, one end of the elastic tongue plate is installed in the special-shaped groove, the other end of the bottom of the hinge type guide block is provided with a special-shaped hole, the part of the elastic tongue plate extending out of the special-shaped groove is inserted into the special-shaped hole, the second fixed block is provided with at least one plunger, the hinge type guide block can be pushed to rotate through the extension of the plunger compared with the first fixed block, and when the plunger retracts, the elastic tongue plate can drive the hinge type guide. The invention can greatly reduce the blocking risk when the tool is tripped out of the drill.)

1. The externally hung hinge type active retraction pushing mechanism for the BH-VDT tool is characterized in that: the tool comprises a tool body, wherein a plurality of hinge type guide modules are uniformly distributed on the outer wall of the tool body in the circumferential direction, each hinge type guide module comprises a hinge type guide block, a first fixing block, a second fixing block and an elastic tongue plate, the first fixing block and the second fixing block are integrally formed with the tool body, a mounting groove is formed in the first fixing block, a guide pin matched with the mounting groove is arranged at one end of the bottom of each hinge type guide block, and the guide pins are rotatably connected with the first fixing block through pin shafts; a special-shaped groove is formed in one side of the second fixing block, one end of the elastic tongue plate is installed in the special-shaped groove, the other end of the elastic tongue plate extends out of the special-shaped groove, a special-shaped hole is formed in the other end of the bottom of the hinge type guide block, and the part of the elastic tongue plate extending out of the special-shaped groove is inserted into the special-shaped hole, so that the hinge type guide block is buckled on the first fixing block and the second fixing block;

The second fixed block is provided with at least one plunger, the plunger can extend out of or retract into the upper surface of the second fixed block and can extend out of the plunger to push the hinge type guide block to rotate relative to the first fixed block, and when the plunger retracts, the elastic tongue plate can drive the hinge type guide block to restore to the original position.

2. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 1, wherein: the hinge type guide block and the first fixing block are connected through the pin shaft, and a bearing is installed between the pin shaft and the first fixing block.

3. The externally hinged active retraction thrusting mechanism for BH-VDT tools of claim 2, wherein: the lug plate of the pin shaft is in a large semicircular shape, the plane of the lug plate is parallel to the plane of the mounting groove, and the pin shaft is provided with a limiting groove.

4. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 3, wherein: the limiting screw penetrates through the hinge type guide block and the guide pin, and the lower end of the limiting screw is clamped on the limiting groove.

5. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 1, wherein: the elastic tongue plate is of a wedge-shaped structure as a whole.

6. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 1, wherein: one end of the elastic tongue plate is arranged in the special-shaped groove through a screw.

7. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 1, wherein: the bottom surface of the hinge type guide block at the end of the special-shaped hole is in a slope shape.

8. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 1, wherein: the number of the plungers on the second fixing block is at least 2, and the plungers sequentially form a height difference when extending out of the upper surface of the second fixing block, so that the plungers extending out of the upper surface of the second fixing block are all contacted with the bottom surface of the hinge type guide block, and the plungers are pushed to rotate compared with the first fixing block.

9. The externally hinged active retraction thrusting mechanism for a BH-VDT tool of claim 1, wherein: and the plunger is controlled to extend out of or retract into the upper surface of the second fixed block through hydraulic oil.

Technical Field

The invention belongs to the technical field of oil drilling equipment, and particularly relates to an externally hung hinge type active retraction pushing mechanism for a BH-VDT tool.

Background

The BH-VDT tool is a high-end drilling tool developed for Bohai sea drilling, is a precise instrument integrating electro-hydraulic systems, and has a good application prospect in the drilling process of complex strata which are high in geological inclination angle, easy to incline and difficult to stabilize. The product has been formed 12 ¹/₄The '22' series products are firstly pushed by a floating type pushing mechanism which is translated up and down, a guide block is outwards expanded under the action of the elastic force of an upper disc spring of a tool in a free state, and the elastic force of the disc spring is larger, so that the tool cannot pass through 12 parts when being applied to the Xinjiang Tarim area¹/₄"、13¹/₈"upper thick wall casing of both open hole sections.

Therefore, based on the problems, the external hinge type active retraction pushing mechanism for the BH-VDT tool, which can greatly reduce the risk of blocking when the tool is tripped out of the drill, has important practical significance.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an externally-hung hinged active retraction pushing mechanism for a BH-VDT tool, which can greatly reduce the risk of blocking when the tool is tripped out of a drill.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the external hinge type active retraction pushing mechanism for the BH-VDT tool comprises a tool body, wherein a plurality of hinge type guide modules are uniformly distributed on the outer wall of the tool body in the circumferential direction, each hinge type guide module comprises a hinge type guide block, a first fixing block, a second fixing block and an elastic tongue plate, the first fixing block and the second fixing block are integrally formed with the tool body, a mounting groove is formed in the first fixing block, a guide pin matched with the mounting groove is arranged at one end of the bottom of the hinge type guide block, and the guide pin is rotatably connected with the first fixing block through a pin shaft; a special-shaped groove is formed in one side of the second fixing block, one end of the elastic tongue plate is installed in the special-shaped groove, the other end of the elastic tongue plate extends out of the special-shaped groove, a special-shaped hole is formed in the other end of the bottom of the hinge type guide block, and the part of the elastic tongue plate extending out of the special-shaped groove is inserted into the special-shaped hole, so that the hinge type guide block is buckled on the first fixing block and the second fixing block;

The second fixed block is provided with at least one plunger, the plunger can extend out of or retract into the upper surface of the second fixed block and can extend out of the plunger to push the hinge type guide block to rotate relative to the first fixed block, and when the plunger retracts, the elastic tongue plate can drive the hinge type guide block to restore to the original position.

Further, the pin shaft is connected with the hinge type guide block and the first fixing block, and a bearing is arranged between the pin shaft and the first fixing block.

Furthermore, the ear plate of the pin shaft is in a large semicircular shape, the plane of the ear plate is parallel to the plane of the mounting groove, and the pin shaft is provided with a limiting groove.

Furthermore, the hinge type guide block and the guide pin are arranged on the base, and the lower end of the hinge type guide block is clamped on the limiting groove.

Furthermore, the elastic tongue plate is integrally of a wedge-shaped structure.

Furthermore, one end of the elastic tongue plate is installed in the special-shaped groove through a screw.

Furthermore, the bottom surface of the hinge type guide block at the end where the special-shaped hole is located is in a slope shape.

Furthermore, the number of the plungers on the second fixing block is at least 2, and the plungers sequentially form a height difference when extending out of the upper surface of the second fixing block, so that the plungers extending out of the upper surface of the second fixing block are all contacted with the bottom surface of the hinge type guide block, and the plungers are pushed to rotate compared with the first fixing block.

Furthermore, the plunger is controlled to extend out of or retract into the upper surface of the second fixed block through hydraulic oil.

The invention has the advantages and positive effects that:

the active retraction pushing mechanism for the BH-VDT tool provided by the invention has the advantages that when no power is supplied to the tool, the hinge type guide block is actively retracted by the elastic tongue plate, so that the outer diameter of the tool is smaller than that of a drill bit, and the tool is convenient to trip and run into a thick-wall casing.

Drawings

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.

FIG. 1 is an exploded view of the structure of an externally hinged active retraction pushing mechanism for a BH-VDT tool provided in an embodiment of the invention;

FIG. 2 is a generally longitudinal axial cross-sectional view of an externally hinged active retracting backup mechanism for a BH-VDT tool provided in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the junction of an elastic tongue plate for a BH-VDT tool external hinged active retraction pushing mechanism provided in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the connection between the guide pin and the first fixed block of the externally hinged active retraction pushing mechanism for a BH-VDT tool provided in the embodiments of the present invention;

FIG. 5 is a longitudinal axial cross-sectional view of a pin for use in an externally hinged active retraction thrusting mechanism of a BH-VDT tool provided in an embodiment of the invention;

FIG. 6 is a right side view of FIG. 5;

FIG. 7 is a top view of an elastic tongue plate for a BH-VDT tool external hinged active retraction pushing mechanism provided in an embodiment of the present invention;

FIG. 8 is a front view of an elastic tongue plate for a BH-VDT tool externally attached hinged active retraction pushing mechanism provided in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a profiled slot for a BH-VDT tool external hinge type active retraction pushing mechanism provided in an embodiment of the present invention;

FIG. 10 is a longitudinal axial cross-sectional view of a hinged guide block for a BH-VDT tool external hinged active retraction pushing mechanism provided in an embodiment of the present invention;

FIG. 11 is a bottom view of a hinged guide block for a BH-VDT tool externally attached hinged active retraction pushing mechanism provided in an embodiment of the present invention;

FIG. 12 is a schematic diagram of a plunger and plunger washer for use in an externally hinged active retraction pushing mechanism of a BH-VDT tool provided in an embodiment of the present invention;

Detailed Description

First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The present invention will be described in detail with reference to fig. 1 to 12.

The external hinge type active retraction pushing mechanism for the BH-VDT tool comprises a tool body 1, wherein a plurality of hinge type guide modules are uniformly distributed on the outer wall of the tool body 1 in the circumferential direction, each hinge type guide module comprises a hinge type guide block 8, a first fixing block 13, a second fixing block 14 and an elastic tongue plate 6, the first fixing block 13 and the second fixing block 14 are integrally formed with the tool body 1, a mounting groove 1301 is formed in the first fixing block 13, a guide pin 801 matched with the mounting groove 1301 is arranged at one end of the bottom of the hinge type guide block 8, and the guide pin 801 is rotatably connected with the first fixing block 13 through a pin shaft 2; a special-shaped groove 1401 is arranged at one side of the second fixed block 14, one end of the elastic tongue plate 6 is installed in the special-shaped groove 1401, the other end of the elastic tongue plate 6 extends out of the special-shaped groove 1401, a special-shaped hole 802 is arranged at the other end of the bottom of the hinge type guide block 8, and the part of the elastic tongue plate 6 extending out of the special-shaped groove 1401 is inserted into the special-shaped hole 802, so that the hinge type guide block 8 is buckled on the first fixed block 13 and the second fixed block 14;

the second fixed block 14 is provided with at least one plunger 7, the plunger 7 can extend out of or retract into the upper surface of the second fixed block 14, the hinge guide block 8 can be pushed to rotate by extending out of the plunger 7 compared with the first fixed block 13, and when the plunger 7 retracts, the elastic tongue plate 6 can drive the hinge guide block 8 to restore to the original position.

In particular, one can consider: the pin shaft 2 is connected with the hinge type guide block 8 and the first fixing block 13, and the bearing 3 is installed between the pin shaft 2 and the first fixing block 13, in the embodiment, the bearing can be a copper-based oilless composite bearing, and high-temperature-resistant high-strength fixing glue is smeared between the bearing and the first fixing block 13; it should be noted that the lug plate of the pin shaft 2 is in a large semicircular shape, the plane of the lug plate is parallel to the plane of the mounting groove 1301, the pin shaft 2 is provided with a limiting groove 201, it can be considered that chamfers are arranged at two ends of the limiting groove 201, the pin shaft 2 is convenient to disassemble when micro-deformation occurs, the tail end of the pin shaft 2 is provided with a clamp spring groove 202, a shaft clamp spring 9 is mounted in the clamp spring groove 202, before the shaft clamp spring 9 is mounted, the pin shaft washer 10 can be mounted on the pin shaft 2 to play a role in auxiliary fixing, and the mounting mode of the shaft clamp spring 9 adopts a conventional mounting mode to play a role in limiting and fixing the pin shaft 2;

the hinge type guide block comprises a hinge type guide block body 8 and a guide pin 801, and is characterized by further comprising a limit screw 11, wherein the limit screw 11 penetrates through the hinge type guide block body 8 and the guide pin 801, the lower end of the limit screw is clamped on the limit groove 201, in the embodiment, the limit screw is made of stainless steel materials, the tail end of the limit screw is cylindrical and is provided with a round chamfer, when the limit screw 11 is installed, after the limit screw 11 is coated with medium-strength thread glue, the limit screw is screwed in from a threaded hole in the top end of the hinge type guide block body 8, the head of the limit screw 11 is just located in the limit groove 201 of the pin shaft 2.

In this embodiment, it is considered that the elastic tongue plate 6 is made of a titanium alloy material, and the whole elastic tongue plate is in a wedge-shaped structure, so that stress is uniformly distributed when the elastic tongue plate is bent flexibly, two threaded holes are reserved at the upper end of the elastic tongue plate 6 for fixing, one end of the elastic tongue plate 6, which is reserved with the threaded holes, is installed in the special-shaped groove 1401 through the screws 5, and the screws 5 are also provided with the hole retainer rings 4; when the elastic tongue plate is installed, the plane of the elastic tongue plate is punched, high-strength carbon steel screws are used for coating high-strength thread glue, 42 N.m torque is applied, and finally the check ring 4 for holes is installed at the tops of the screws, so that the effect of preventing the screws from loosening and falling off is achieved.

It should be noted that the bottom surface of the hinge-type guide block 8 at the end of the special-shaped hole 802 is in a slope shape, so that the hinge-type guide block 8 is parallel to the well wall when being unfolded;

the number of the plungers 7 on the second fixed block 14 is at least 2, and the plungers 7 sequentially form a height difference when extending out of the upper surface of the second fixed block 14, so that the plungers 7 extending out of the upper surface of the second fixed block 14 are all contacted with the bottom surface of the hinge type guide block 8, and are pushed to rotate compared with the first fixed block 13; in this embodiment, as shown in fig. 12, 2 plungers 7 are provided on the second fixing block 14, and in order to realize that the plungers 7 extending out of the upper surface of the second fixing block 14 form a height difference, it may be considered that a plunger washer 12 is sleeved on the plunger 7 far from the elastic tongue plate 6, so that when the plunger 7 rises, due to the obstruction of the plunger washer 12, the rising height of the plunger 7 is lower than the rising height of the plunger 7 near the elastic tongue plate 6 side, so that both plungers can contact the guide block when extending out to the maximum.

It can be considered that the plunger 7 is controlled to extend out of or retract into the upper surface of the second fixed block 14 by hydraulic oil, specifically, in this embodiment, hydraulic oil can be injected into the space where the plunger 7 is located by opening an oil inlet hole on the second fixed block, and the position and the number of the opened oil inlet holes can be set as appropriate according to actual conditions, which is not described herein again.

For example, in this embodiment, when the mechanism is used, the tool hydraulic system pumps high-pressure oil to extend the plunger 7, so as to drive the hinge-type guide block 8 to rotate slightly and push out along the pin 2, at this time, the elastic tongue 6 extending into the irregular hole 802 below the hinge-type guide block is flexibly deformed (the elastic force generated by the tongue is much smaller than the pushing force of the plunger), and when the hydraulic system is relieved, the elastic force of the elastic tongue 6 acts, so that the hinge-type guide block 8 is actively retracted.

The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.