Automatic back-off device for handling underground accidents in drilling process

Abstract

The invention discloses an automatic back-off device for handling underground accidents in the drilling process, and relates to the technical field of drilling tools, the automatic back-off device comprises a connecting sleeve, one end of the connecting sleeve is provided with a connector used for being connected with drilling equipment, and the other end of the connecting sleeve is provided with a cavity used for being connected with a drilling tool; the threaded sleeve is rotationally connected into the cavity; the gear sleeve is rotationally connected into the cavity, and the gear sleeve is fixedly connected with the threaded sleeve through a vertical rod; the motor is arranged in the inner wall of the cavity, a gear is assembled at the output end of the motor, the gear is in meshed connection with the gear sleeve, and the gear and the gear sleeve form a gear set; according to the automatic reverse buckling structure, reverse buckling type drilling tools or pipes can be eliminated, so that the transportation cost and the rental expense are greatly saved, the time for handling accidents is also greatly saved, and the key effect on reducing various huge costs is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools, and more particularly to an automatic undercut device for handling downhole accidents during drilling. Background Art

[0002] During various drilling constructions or various underground operations, various accidents often occur in the well due to different or similar reasons, such as drill sticking, drill sticking, drill buried, drill broken, etc.

[0003] After similar accidents have occurred in the current technical field, many accidents require the use of reversed drill bits or pipes in the final stage of accident handling, and the drill bits or pipes in the well are gradually poured out in multiple reciprocating movements. However, almost all work sites lack such reversed drill bits or pipes, and the number of them on the market is relatively limited. In addition, they are expensive, and they also require long-distance transportation and high rental costs, which greatly wastes time in handling accidents and high economic costs. The reason for the current gap in the field is that the current technical methods in this field are still stuck in the technical conditions of the 1950s and 1960s, and have not been improved during this period.

[0004] Based on the above problems, we provide an automatic backlash device for handling underground accidents during drilling.

[0005] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0006] In order to solve the technical problem raised in the above background technology that after similar accidents occur in the current technical field, many accident handling requires the use of reversed drill tools or pipes in the well in the final stage, and the drill tools or pipes in the well are gradually poured out in multiple reciprocating cycles. However, almost all work sites lack such reversed drill tools or pipes, and the number of them on the market is relatively limited. In addition, they are expensive, and they also need to bear long-distance transportation and high rental costs, which greatly wastes time for handling accidents and has high economic costs. The present invention provides an automatic reverse device for handling underground accidents during drilling.

[0007] The automatic undercut device for handling underground accidents during drilling provided by the present invention adopts the following technical solution:

[0008] An automatic undercut device for handling underground accidents during drilling, comprising a connecting sleeve, one end of which is provided with a connecting head for connecting to drilling equipment, and the other end of the connecting sleeve is provided with a chamber for connecting a drilling tool; a threaded sleeve, rotatably connected in the chamber; a gear sleeve, rotatably connected in the chamber, and the gear sleeve is fixedly connected to the threaded sleeve through a vertical rod; a motor, which is arranged in the inner wall of the chamber, and the output end of the motor is equipped with a gear, the gear is meshed and connected with the gear sleeve, and the gear and the gear sleeve constitute a gear set; a trigger mechanism, which is arranged in the chamber and is used to start the motor.

[0009] Preferably, the trigger mechanism includes a slide groove opened in the inner wall of the chamber, a fixed rod is arranged inside the slide groove, a moving rod is sleeved on the side end of the fixed rod, and one end of the moving rod is arranged at the side port of the chamber, a connecting groove is opened inside the moving rod, and a contact switch is arranged between the connecting groove and the fixed rod.

[0010] Preferably, a spring is arranged inside the connecting groove, and a side end of the spring is connected to the fixed rod.

[0011] Preferably, a contact plate is provided at the side end of the movable rod.

[0012] Preferably, the contact switch comprises a first conductive contact arranged on the outer side surface of the fixed rod, and a second conductive contact is arranged on the inner wall of the connecting groove.

[0013] Preferably, the motor is a servo motor.

[0014] Preferably, a hydraulic rod is arranged inside the connecting sleeve at a position relative to the threaded sleeve, and the telescopic end of the hydraulic rod can press and contact the outer side surface of the threaded sleeve.

[0015] Preferably, the outer side surface of the threaded sleeve is provided with a socket for connecting the telescopic end of the hydraulic rod.

[0016] In summary, the present invention includes the following beneficial technical effects:

[0017] 1. When the chamber contacts the accident head, the trigger mechanism will start the motor, so that the motor drives the gear to rotate, and the gear rotation causes the gear sleeve to rotate, thereby the gear sleeve drives the threaded sleeve to rotate through the vertical rod. When the rotating threaded sleeve contacts the top of the accident head, it will be threadedly connected with the thread teeth on the accident head, thereby reverse opening the accident head. Through this structural design, the function of the accident drill or pipe in the well can be reversed, and there is no need to use reverse-threaded drilling tools, which effectively saves costs and improves work efficiency.

[0018] 2. The automatic reverse buckle structure of the present invention can eliminate reverse buckle drilling tools or pipes, thereby greatly saving transportation costs and rental fees, and greatly saving the time for handling accidents, thereby playing a key role in reducing various huge costs.

[0019] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an automatic undercut device for handling downhole accidents during drilling in an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the other side of an automatic undercut device for handling downhole accidents during drilling according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure inside an automatic undercut device for handling downhole accidents during drilling according to an embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a side end of an automatic undercut device for handling downhole accidents during drilling according to an embodiment of the present invention;

[0024] Figure 5 It is a schematic structural diagram of a cross-section of an automatic undercut device for handling downhole accidents during drilling according to an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 Schematic diagram of the structure enlarged at point A in the middle.

[0026] Explanation of the accompanying drawings: 1. connecting sleeve; 2. connecting head; 3. chamber; 4. threaded sleeve; 5. gear sleeve; 6. motor; 7. gear; 8. trigger mechanism; 800. slide groove; 801. fixed rod; 802. moving rod; 803. connecting groove; 804. contact switch; 805. spring; 806. contact plate; 9. hydraulic rod. DETAILED DESCRIPTION

[0027] The following is combined with Figures 1 to 6 The present invention is described in further detail.

[0028] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0029] Embodiment 1

[0030] The embodiment of the present invention discloses an automatic undercut device for handling underground accidents during drilling. Figures 1 to 6 , an automatic undercut device for handling underground accidents during drilling, comprising a connecting sleeve 1, a threaded sleeve 4, a gear sleeve 5, a motor 6 and a trigger mechanism 8, wherein one end of the connecting sleeve 1 is provided with a connecting head 2 for connecting drilling equipment, and the other end of the connecting sleeve 1 is provided with a chamber 3 for connecting a drilling tool; the threaded sleeve 4 is rotatably connected in the chamber 3; the gear sleeve 5 is rotatably connected in the chamber 3, the gear sleeve 5 is fixedly connected to the threaded sleeve 4 through a vertical rod, and a gear 7 and the gear sleeve 5 form a gear set; the motor 6 is arranged in the inner wall of the chamber 3, and the output end of the motor 6 is equipped with a gear 7, and the gear 7 is meshed and connected with the gear sleeve 5; the trigger mechanism 8 is arranged in the chamber 3, and is used to start the motor 6.

[0031] Specifically, the connecting sleeve 1 is assembled on the drilling equipment through the connecting head 2, and then the connecting sleeve 1 is transmitted to the accident site through the drilling equipment. When the chamber 3 contacts the accident head, the trigger mechanism 8 turns on the motor 6, so that the motor 6 drives the gear 7 to rotate, and the gear 7 rotates to rotate the gear sleeve 5, thereby the gear sleeve 5 drives the threaded sleeve 4 to rotate through the vertical rod. When the rotating threaded sleeve 4 contacts the top of the accident head, it will be threadedly connected with the thread teeth on the accident head, thereby opening the accident head;

[0032] Through this structural design, the function of the accident drill or pipe in the well can be reversed, and there is no need to use reverse drilling tools, which effectively saves costs and improves work efficiency.

[0033] like Figure 3 and Figure 5 As shown, the trigger mechanism 8 includes a slide groove 800 opened in the inner wall of the chamber 3, a fixed rod 801 is arranged inside the slide groove 800, a moving rod 802 is sleeved on the side end of the fixed rod 801, and one end of the moving rod 802 is arranged at the side port of the chamber 3, a connecting groove 803 is opened inside the moving rod 802, and a contact switch 804 is arranged between the connecting groove 803 and the fixed rod 801.

[0034] Specifically, the use of the trigger mechanism 8 is that when the chamber 3 moves downward to contact the accident head, the accident head will push the movable rod 802 to move, so that the movable rod 802 is inserted into the fixed rod 801, thereby the contact switch 804 is turned on, thereby making the motor 6 work.

[0035] like Figure 5 As shown, a spring 805 is arranged inside the connecting groove 803, and the side end of the spring 805 is connected to the fixed rod 801. By setting the spring 805, when the movable rod 802 is not in use, the contact switch 804 can be disconnected under the action of the elastic force of the spring 805.

[0036] like Figure 2 As shown, a contact plate 806 is provided at the side end of the movable rod 802 .

[0037] like Figure 5 As shown, the contact switch 804 includes a conductive contact piece 1 arranged on the outer surface of the fixed rod 801, and a conductive contact piece 2 is arranged on the inner wall of the connecting groove 803. The conductive contact piece 1 and the conductive contact piece 2 are electrically connected to the circuit of the motor 6, and the circuit is powered by the battery inside the connecting sleeve 1.

[0038] Specifically, the motor 6 is a servo motor.

[0039] Embodiment 2

[0040] This embodiment is further optimized on the basis of the above embodiment 1, and the same parts as the above technical solution will not be repeated here. Figure 5 As shown, in order to better realize the present invention, the following setting is particularly adopted: in this embodiment, a hydraulic rod 9 is arranged inside the connecting sleeve 1 relative to the position of the threaded sleeve 4, and the telescopic end of the hydraulic rod 9 can squeeze and contact the outer side surface of the threaded sleeve 4.

[0041] Specifically, when the torque of the drilling tool is too large to be reversed, the threaded sleeve 4 can be squeezed by the hydraulic rod 9 to fix the threaded sleeve 4 in the chamber 3, and then the external drilling equipment drives the connecting sleeve 1 to rotate to complete the reverse opening of the accident head.

[0042] Specifically, the control method of the present invention is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field, and the control method and circuit connection are not explained in detail here.

[0043] Embodiment 3

[0044] This embodiment is further optimized on the basis of the above-mentioned embodiment 2, and the same parts as the above-mentioned technical solution will not be repeated here. Figure 6 As shown, in order to better realize the present invention, the following setting is particularly adopted: in this embodiment, the outer side surface of the threaded sleeve 4 is provided with a socket for connecting the telescopic end of the hydraulic rod 9. This design can further ensure the fixity of the threaded sleeve 4 assembled on the connecting sleeve 1.

[0045] It is worth noting that: in the current process of handling similar accidents, usually after an accident occurs, an emergency contact will be made to rent reverse-hook drilling tools or pipes, which are quite expensive. The current market price is basically one to two yuan per meter. At present, most of the well depths of such projects range from several hundred meters to several thousand meters. There are even ultra-deep wells of tens of thousands of meters in China. Taking one thousand meters as an example, the daily rental fee is more than one thousand yuan plus labor and other consumption, and a similar accident requires several days to several months to handle, and there are even records of handling for up to several years. The cost is a very huge consumption. The automatic reverse-hook structure of the present invention can eliminate reverse-hook drilling tools or pipes, thereby greatly saving transportation costs and rental costs, and the time for handling accidents is also greatly saved, thereby playing a key role in reducing various huge costs.

[0046] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0047] The implementation principle of an automatic reverse-threading device for handling underground accidents during drilling in an embodiment of the present invention is as follows: the connecting sleeve 1 is assembled on the drilling equipment through the connecting head 2, and then the connecting sleeve 1 is transmitted to the accident site through the drilling equipment. When the chamber 3 contacts the accident head, the trigger mechanism 8 will start the motor 6, so that the motor 6 drives the gear 7 to rotate, and the rotation of the gear 7 causes the gear sleeve 5 to rotate, thereby the gear sleeve 5 drives the threaded sleeve 4 to rotate through the vertical rod, and the rotating threaded sleeve 4 will be threadedly connected with the thread teeth on the accident head when contacting the top of the accident head, thereby reverse-opening the accident head.

[0048] The use of the trigger mechanism 8 is that when the chamber 3 moves downward to contact the accident head, the accident head will push the movable rod 802 to move upward, so that the movable rod 802 is inserted into the fixed rod 801, thereby the contact switch 804 is turned on, thereby making the motor 6 work.

[0049] When the torque of the drilling tool is too large to be reversed, the threaded sleeve 4 can be squeezed by the hydraulic rod 9 to fix the threaded sleeve 4 in the chamber 3, and then the connecting sleeve 1 is driven by the external drilling equipment to rotate to complete the reverse opening of the accident head.

[0050] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0054] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0055] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic undercut device for handling downhole accidents during drilling, characterized in that: include: A connecting sleeve (1), one end of which is provided with a connecting head (2) for connecting to drilling equipment, and the other end of which is provided with a chamber (3) for connecting to a drilling tool; A threaded sleeve (4) rotatably connected in the chamber (3); A gear sleeve (5) is rotatably connected in the chamber (3), and the gear sleeve (5) is fixedly connected to the threaded sleeve (4) via a vertical rod; A motor (6) is arranged in the inner wall of the chamber (3), and a gear (7) is mounted on the output end of the motor (6), the gear (7) is meshedly connected with the gear sleeve (5), and the gear (7) and the gear sleeve (5) form a gear set; A trigger mechanism (8) is arranged in the chamber (3) and is used to start the motor (6).

2. The automatic undercut device for handling downhole accidents during drilling according to claim 1, characterized in that: The trigger mechanism (8) comprises a slide groove (800) provided in the inner wall of the chamber (3); a fixed rod (801) is arranged inside the slide groove (800); a moving rod (802) is sleeved on the side end of the fixed rod (801); one end of the moving rod (802) is arranged at the side port of the chamber (3); a connecting groove (803) is provided inside the moving rod (802); and a contact switch (804) is arranged between the connecting groove (803) and the fixed rod (801).

3. The automatic undercut device for handling downhole accidents during drilling according to claim 2, characterized in that: A spring (805) is disposed inside the connection groove (803), and a side end of the spring (805) is connected to the fixed rod (801).

4. The automatic undercut device for handling downhole accidents during drilling according to claim 2, characterized in that: A contact plate (806) is provided at the side end of the movable rod (802).

5. The automatic undercut device for handling downhole accidents during drilling according to claim 2, characterized in that: The contact switch (804) comprises a first conductive contact arranged on the outer surface of the fixed rod (801), and a second conductive contact is arranged on the inner wall of the connecting groove (803).

6. The automatic undercut device for handling downhole accidents during drilling according to claim 1, characterized in that: The motor (6) is a servo motor.

7. The automatic undercut device for handling downhole accidents during drilling according to claim 1, characterized in that: A hydraulic rod (9) is arranged inside the connecting sleeve (1) at a position relative to the threaded sleeve (4), and the telescopic end of the hydraulic rod (9) is capable of pressing and contacting the outer side surface of the threaded sleeve (4).

8. The automatic undercut device for handling downhole accidents during drilling according to claim 2, characterized in that: The outer side surface of the threaded sleeve (4) is provided with a socket for connecting the telescopic end of the hydraulic rod (9).

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