A flow director for drilling

Abstract

The utility model relates to the technical field of well drilling, disclose a kind of flow director for well drilling, including first flow director, second flow director and flow pipe;The first flow director is connected to the top of drill pipe;The second flow director is connected to the top of casing;First pass-through is opened in the first flow director along axial direction and penetrates;First connecting pipe is arranged in the lateral wall of the first flow director, and the first connecting pipe is used to communicate the first pass-through;Second pass-through is opened in the second flow director along axial direction and penetrates;Second connecting pipe is arranged in the lateral wall of the second flow director, and the second connecting pipe is used to communicate the second pass-through;The first connecting pipe and the second connecting pipe can be communicated by the flow pipe, so that the drilling fluid in drill pipe can flow into the second flow director from the first flow director, and then flow back to casing.The technical scheme provided by the utility model can avoid the waste of drilling fluid caused by inner tube.

Description

Technical Field

[0001] This utility model relates to the field of drilling technology, and specifically to a drilling guide. Background Technology

[0002] Drilling is a crucial step in the exploration and development of oil and gas, used to create wellbores underground to extract resources. Drilling technology is not limited to the oil and gas industry; it is also widely used in geothermal energy, groundwater exploration, and geological surveys. During drilling operations, sufficient drilling fluid is typically required within the borehole. This fluid serves functions such as cooling the drill bit and stabilizing the wellbore, greatly aiding the drilling process.

[0003] During drilling operations, it is often necessary to insert the inner casing into the drill pipe for specific operations, such as coring, measurement, or addressing downhole problems. However, when the inner casing is pulled up, the drilling fluid inside the drill pipe will gush out, causing the following problems: 1. Drilling fluid gushes directly from the drill pipe opening to the surface, resulting in waste; 2. Splashed drilling fluid scatters on the wellhead work platform, causing wellhead contamination; 3. Drilling fluid scattered on the work platform makes it slippery, increasing the risk of workers slipping; 4. As the drilling fluid gushes out, the drilling fluid level in the wellbore drops, which may cause pressure imbalance in the borehole, increasing the risk of borehole instability and collapse. Therefore, this utility model proposes a drilling guide to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a drilling guide to avoid drilling fluid waste caused by lifting the inner tube.

[0005] To achieve the above objectives, the drilling fluid guide proposed in this utility model includes a first guide, a second guide, and a guide pipe; the first guide is connected to the top end of the drill pipe; the second guide is connected to the top end of the casing; the first guide has a first through-hole extending axially, which is used to connect to the drill pipe; a first connecting pipe passes through the side wall of the first guide, which is used to connect to the first through-hole; the second guide has a second through-hole extending axially, which is used to connect to the casing; a second connecting pipe passes through the side wall of the second guide, which is used to connect to the second through-hole; the first connecting pipe and the second connecting pipe can be connected through the guide pipe, so that the drilling fluid in the drill pipe can flow from the first guide into the second guide and then flow back to the casing.

[0006] Preferably, the first passage includes a funnel-shaped section away from the drill pipe and a straight cylindrical section close to the drill pipe; a rounded chamfer transition is provided between the funnel-shaped section and the straight cylindrical section; the first connecting pipe communicates with the straight cylindrical section; the first passage is coaxial with the drill pipe; the second passage is cylindrical; and the second passage is coaxial with the casing.

[0007] Preferably, the first guide includes a first guide body and a first connecting part; the first connecting pipe passes through the side wall of the first guide body; the first connecting part is threadedly connected to the drill pipe; the second guide includes a second guide body and a second connecting part; the second connecting pipe passes through the side wall of the second guide body; the second connecting part is threadedly connected to the casing.

[0008] Preferably, a filter screen is provided at the end of the first connecting pipe near the body of the first flow guide, and a first flange is provided at the end of the first connecting pipe away from the body of the first flow guide, and the first connecting pipe is connected to the flow guide through the first flange; a second flange is provided at the end of the second connecting pipe away from the body of the second flow guide; the second connecting pipe is connected to the flow guide through the second flange.

[0009] Preferably, a first handle is connected to the outer side wall of the first flow guide body; the first handle is L-shaped; one end of the first handle is connected to the outer side wall of the first flow guide body, and the other end of the first handle is parallel to the axis of the first flow guide body; a second handle is connected to the outer side wall of the second flow guide body; the second handle is L-shaped; one end of the second handle is connected to the outer side wall of the second flow guide body, and the other end of the second handle is parallel to the axis of the second flow guide body.

[0010] Preferably, the drilling guide further includes a mud tank; the guide pipe includes a first guide pipe and a second guide pipe; one end of the first guide pipe is connected to the first connecting pipe, and the other end of the first guide pipe is connected to the feed inlet of the mud tank; the feed inlet is located at the upper part of the mud tank; one end of the second guide pipe is connected to the second connecting pipe, and the other end of the second guide pipe is connected to the discharge outlet of the mud tank; the discharge outlet is located at the lower part of the mud tank.

[0011] Preferably, the top of the mud tank has an opening through which external drilling fluid can be added; a cover is provided at the opening.

[0012] Preferably, a first valve is provided at the feed inlet, and a second valve is provided at the discharge outlet.

[0013] Preferably, the first connecting part is frustoconical, and the outer side of the first connecting part is provided with a first external thread that matches the internal thread of the drill rod end; the second connecting part is frustoconical, and the outer side of the second connecting part is provided with a second external thread that matches the internal thread of the casing end.

[0014] Preferably, a first glove is provided at the end of the first handle away from the body of the first flow guide; and a second glove is provided at the end of the second handle away from the body of the second flow guide.

[0015] In this invention, the first guide valve is connected to the top of the drill pipe and communicates with the interior of the drill pipe through a first through-port arranged axially. The second guide valve is connected to the top of the casing and communicates with the interior of the casing through a second through-port arranged axially. A first connecting pipe communicating with the first through-port is provided through the side wall of the first guide valve, and a second connecting pipe communicating with the second through-port is provided through the side wall of the second guide valve. The first connecting pipe and the second connecting pipe are connected through the guide pipe. Therefore, when drilling fluid flows out from the top of the drill pipe, it flows from the first connecting pipe through the guide pipe into the second connecting pipe, and then back into the casing, thus avoiding the loss and waste of drilling fluid. In summary, the drilling guide valve is simple and practical, capable of guiding drilling fluid flowing out of the drill pipe back into the casing, preventing the loss and waste of drilling fluid. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the first flow guide of the drilling flow guide of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the second flow guide of the drilling flow guide of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the first embodiment of the drilling guide of this utility model;

[0020] Figure 4 This is a schematic diagram of the second embodiment of the drilling guide of this utility model.

[0021] Explanation of icon numbers:

[0022] 1-First guide tube; 11-First connecting pipe; 12-First handle; 13-First glove; 14-First guide tube body; 15-First connecting part; 16-First external thread; 17-First flange; 18-Funnel-shaped section; 19-Straight cylindrical end; 110-Filter screen; 2-Second guide tube; 21-Second connecting pipe; 22-Second handle; 23-Second glove; 24-Second guide tube body; 25-Second connecting part; 26-Second external thread; 27-Second flange; 28-Second passage; 3-Guide tube; 31-First guide tube; 32-Second guide tube; 4-Drill pipe; 5-Casing; 6-Mud tank; 61-Cover; 7-First valve; 8-Second valve.

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] This utility model proposes a flow guide for drilling.

[0030] Please refer to Figures 1 to 4 The drilling fluid guide includes a first guide 1, a second guide 2, and a guide pipe 3. The first guide 1 is connected to the top end of the drill pipe 4. The second guide 2 is connected to the top end of the casing 5. The first guide 1 has a first through-hole extending axially, which is used to connect the drill pipe 4. A first connecting pipe 11 is provided through the side wall of the first guide 1, which is used to connect the first through-hole. The second guide 1 has a second through-hole extending axially, which is used to connect the casing 5. A second connecting pipe 21 is provided through the side wall of the second guide 2, which is used to connect the second through-hole. The first connecting pipe 11 and the second connecting pipe 21 can be connected through the guide pipe 3 so that the drilling fluid in the drill pipe 4 can flow from the first guide 1 into the second guide 2, and then flow back to the casing 5.

[0031] In this invention, the first guide valve 1 is connected to the top of the drill pipe 4 and communicates with the interior of the drill pipe 4 through a first through-port arranged axially. The second guide valve 2 is connected to the top of the casing 5 and communicates with the interior of the casing 5 through a second through-port arranged axially. A first connecting pipe 11 communicating with the first through-port is provided through the side wall of the first guide valve 1, and a second connecting pipe 21 communicating with the second through-port is provided through the side wall of the second guide valve 2. The first connecting pipe 11 and the second connecting pipe 21 can be connected through the guide pipe 3. Therefore, when drilling fluid flows out from the top of the drill pipe, it flows from the first connecting pipe 11 through the guide pipe 3 into the second connecting pipe 21, and then back into the casing 5, thus avoiding the loss and waste of drilling fluid. In summary, the drilling guide valve is simple and practical, and can guide the drilling fluid flowing out of the drill pipe back into the casing, avoiding the loss and waste of drilling fluid.

[0032] Specifically, the first guide tube 1 is detachably connected to the top end of the drill pipe 4; the second guide tube 2 is detachably connected to the top end of the casing 5; the guide tube 3 is a flexible hose, and the guide tube 3 can be detachably connected to the first connecting tube 11 and the second connecting tube 21 respectively, such as by flange connection, threaded connection, etc.; the axis of the first connecting tube 11 is perpendicular to the axis of the first guide tube 1; the axis of the second connecting tube 21 is perpendicular to the axis of the second guide tube 2; the inner diameters of the first connecting tube 11 and the second connecting tube 21 are the same.

[0033] In one embodiment, one end of the guide pipe 3 is connected to the first connecting pipe 11, and the other end of the guide pipe 3 is connected to the second connecting pipe 21.

[0034] Furthermore, the end of the first guide tube 1 away from the drill pipe 4 can be detachably connected to another first guide tube 1, and a plurality of second connecting pipes 21 are provided through the side wall of the second guide tube 2. The second connecting pipes 21 correspond one-to-one with the first guide tubes 1, and the second connecting pipes 21 are connected to the corresponding first guide tubes 1 to prevent the drilling fluid from not having enough time to flow back when the outflow of drilling fluid in the drill pipe 4 is large.

[0035] Preferably, the first passage includes a funnel-shaped section 18 away from the drill pipe 4 and a straight cylindrical section 19 close to the drill pipe 4; a rounded chamfer transition is provided between the funnel-shaped section 18 and the straight cylindrical section 19; the first connecting pipe 11 connects to the straight cylindrical section 19; the first passage is coaxial with the drill pipe 4; the second passage is cylindrical; the second passage is coaxial with the casing 5.

[0036] The funnel-shaped section 18 facilitates the entry of the inner tube into the drill pipe 4 and increases the volume buffer, which helps prevent drilling fluid from gushing out of the drill pipe. Specifically, the small end of the funnel-shaped section 18 is connected to the straight cylindrical section 19, and the funnel-shaped section 18 and the straight cylindrical section 19 are coaxial; the length of the funnel-shaped section 18 is greater than the length of the straight cylindrical section 19.

[0037] Preferably, the first guide 1 includes a first guide body 14 and a first connecting part 15; the first connecting pipe 11 passes through the side wall of the first guide body 14; the first connecting part 15 is threadedly connected to the drill rod 4; the second guide includes a second guide body 24 and a second connecting part 25; the second connecting pipe 21 passes through the side wall of the second guide body 24; the second connecting part 25 is threadedly connected to the casing 5.

[0038] Specifically, the first flow guide body 14 and the first connecting part 15 are coaxial; the second flow guide body 24 and the second connecting part 25 are coaxial.

[0039] Preferably, a filter screen 110 is provided at one end of the first connecting pipe 11 near the first flow guide body 14, and a first flange 17 is provided at one end of the first connecting pipe 11 away from the first flow guide body 14, and the first connecting pipe 11 is connected to the flow guide pipe 3 through the first flange 17; a second flange 27 is provided at one end of the second connecting pipe 21 away from the second flow guide body 24; the second connecting pipe 21 is connected to the flow guide pipe 3 through the second flange 27.

[0040] The filter screen 110 is detachably connected to the first connecting pipe 11 to prevent larger foreign objects from clogging the first connecting pipe 11. The first connecting pipe 11 is flanged to the guide pipe 3, and the second connecting pipe 21 is flanged to the guide pipe 3, which can adapt to different operating conditions, has good sealing performance, and is easy to disassemble and assemble. In one embodiment, one end of the guide pipe 3 is provided with a third flange that matches the first flange 17, and the other end of the guide pipe 3 is provided with a fourth flange that matches the second flange 27.

[0041] Preferably, a first handle 12 is connected to the outer side wall of the first guide body 14; the first handle 12 is L-shaped; one end of the first handle 12 is connected to the outer side wall of the first guide body 14, and the other end of the first handle 12 is parallel to the axis of the first guide body 14; a second handle 22 is connected to the outer side wall of the second guide body 24; the second handle 22 is L-shaped; one end of the second handle 22 is connected to the outer side wall of the second guide body 24, and the other end of the second handle 22 is parallel to the axis of the second guide body 24.

[0042] The first handle 12 facilitates the threaded connection between the first guide tube 1 and the drill rod 4, and also facilitates lifting and moving the first guide tube 1. The second handle 22 facilitates the threaded connection between the second guide tube 2 and the casing 5, and also facilitates lifting and moving the second guide tube 2. Specifically, the first handle 12 is located on the side of the first guide tube body 14 opposite to the first connecting pipe 11; the second handle 22 is located on the side of the second guide tube body 24 opposite to the second connecting pipe 21.

[0043] Preferably, the drilling guide further includes a mud tank 6; the guide pipe 3 includes a first guide pipe 31 and a second guide pipe 32; one end of the first guide pipe 31 is connected to the first connecting pipe 11, and the other end of the first guide pipe 31 is connected to the feed inlet of the mud tank 6; the feed inlet is located at the upper part of the mud tank 6; one end of the second guide pipe 32 is connected to the second connecting pipe 21, and the other end of the second guide pipe 32 is connected to the discharge outlet of the mud tank 6; the discharge outlet is located at the lower part of the mud tank 6.

[0044] The mud tank 6 can receive drilling fluid flowing out of the drill pipe 4 and can also input drilling fluid into the casing 5, which helps to avoid drilling fluid waste and regulate the pressure balance in the borehole. Specifically, the two ends of the first guide pipe 31 are detachably connected to the first connecting pipe 11 and the feed port, respectively, and the two ends of the second guide pipe 32 are detachably connected to the second connecting pipe 21 and the discharge port, respectively. The detachable connection can be a flange connection. The inner bottom wall of the mud tank 6 is inclined or conical to collect the drilling fluid to the discharge port. Furthermore, the bottom of the mud tank 6 is provided with a support frame, and the lower part of the support frame is provided with rollers, and the rollers are equipped with brakes.

[0045] Preferably, the top of the mud tank 6 has an opening through which external drilling fluid can be added to the mud tank 6; a cover 61 is provided at the opening.

[0046] When a loss of return occurs downhole and the drilling fluid level in the borehole is lower than the bottom of the casing 5, external drilling fluid can be added to the mud tank 6 through the opening. The drilling fluid can enter the casing 5 through the second guide 2 to prevent the borehole from collapsing due to lack of drilling fluid.

[0047] Preferably, a first valve 7 is provided at the feed inlet, and a second valve 8 is provided at the discharge outlet. The first valve 7 and the second valve 8 can regulate the drilling fluid flow rate.

[0048] Preferably, the first connecting part 15 is frustoconical, and the outer side of the first connecting part 15 is provided with a first external thread 16 that matches the end internal thread of the drill rod 4; the second connecting part 25 is frustoconical, and the outer side of the second connecting part 25 is provided with a second external thread 26 that matches the end internal thread of the sleeve 5.

[0049] Tapered thread connections are easy to assemble and disassemble, provide good sealing, and are not easily loosened, which helps ensure the stability of the connection. Specifically, the top end of the drill pipe 4 is provided with a first internal thread that matches the first external thread 16; the top end of the casing 5 is provided with a second internal thread that matches the second external thread 26.

[0050] Preferably, a first glove 13 is provided at the end of the first handle 12 away from the first flow guide body 14; a second glove 23 is provided at the end of the second handle 22 away from the second flow guide body 24. Specifically, both the first glove 13 and the second glove 23 are rubber gloves with anti-slip textures on their surfaces.

[0051] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A drilling guide, characterized in that, The system includes a first flow guide (1), a second flow guide (2), and a flow guide pipe (3); the first flow guide (1) is connected to the top end of the drill pipe (4); the second flow guide (2) is connected to the top end of the casing (5); the first flow guide (1) has a first through-hole extending through it along the axial direction, and the first through-hole is used to connect the drill pipe (4); a first connecting pipe (11) is provided through the side wall of the first flow guide (1), and the first connecting pipe (11) is used to connect the first through-hole; the second flow guide has a second through-hole extending through it along the axial direction, and the second through-hole is used to connect the casing (5); a second connecting pipe (21) is provided through the side wall of the second flow guide (2), and the second connecting pipe (21) is used to connect the second through-hole; the first connecting pipe (11) and the second connecting pipe (21) can be connected through the flow guide pipe (3) so that the drilling fluid in the drill pipe (4) can flow from the first flow guide (1) into the second flow guide (2), and then flow back to the casing (5).

2. The drilling guide according to claim 1, characterized in that, The first passage includes a funnel-shaped section (18) away from the drill rod (4) and a straight cylindrical section (19) close to the drill rod (4); a rounded chamfer transition is provided between the funnel-shaped section (18) and the straight cylindrical section (19); the first connecting pipe (11) connects to the straight cylindrical section (19); the first passage is coaxial with the drill rod (4); the second passage is straight cylindrical; the second passage is coaxial with the casing (5).

3. The drilling guide according to claim 2, characterized in that, The first guide (1) includes a first guide body (14) and a first connecting part (15); the first connecting pipe (11) passes through the side wall of the first guide body (14); the first connecting part (15) is threadedly connected to the drill rod (4); the second guide includes a second guide body (24) and a second connecting part (25); the second connecting pipe (21) passes through the side wall of the second guide body (24); the second connecting part (25) is threadedly connected to the casing (5).

4. The drilling guide according to claim 3, characterized in that, A filter screen (110) is provided at the end of the first connecting pipe (11) near the first flow guide body (14), and a first flange (17) is provided at the end of the first connecting pipe (11) away from the first flow guide body (14). The first connecting pipe (11) is connected to the flow guide pipe (3) through the first flange (17). A second flange (27) is provided at the end of the second connecting pipe (21) away from the second flow guide body (24). The second connecting pipe (21) is connected to the flow guide pipe (3) through the second flange (27).

5. The drilling guide according to claim 3, characterized in that, A first handle (12) is connected to the outer wall of the first flow guide body (14); the first handle (12) is L-shaped; one end of the first handle (12) is connected to the outer wall of the first flow guide body (14), and the other end of the first handle (12) is parallel to the axis of the first flow guide body (14); a second handle (22) is connected to the outer wall of the second flow guide body (24); the second handle (22) is L-shaped; one end of the second handle (22) is connected to the outer wall of the second flow guide body (24), and the other end of the second handle (22) is parallel to the axis of the second flow guide body (24).

6. The drilling guide according to claim 1, characterized in that, It also includes a mud tank (6); the guide pipe (3) includes a first guide pipe (31) and a second guide pipe (32); one end of the first guide pipe (31) is connected to the first connecting pipe (11), and the other end of the first guide pipe (31) is connected to the feed inlet of the mud tank (6); the feed inlet is located at the upper part of the mud tank (6); one end of the second guide pipe (32) is connected to the second connecting pipe (21), and the other end of the second guide pipe (32) is connected to the discharge outlet of the mud tank (6); the discharge outlet is located at the lower part of the mud tank (6).

7. The drilling guide according to claim 6, characterized in that, The top of the mud tank (6) is provided with an opening through which external drilling fluid can be added to the mud tank (6); a cover (61) is provided at the opening.

8. The drilling guide according to claim 7, characterized in that, A first valve (7) is provided at the feed inlet, and a second valve (8) is provided at the discharge outlet.

9. The drilling guide according to claim 3, characterized in that, The first connecting part (15) is frustoconical, and the outer side of the first connecting part (15) is provided with a first external thread (16) that matches the end internal thread of the drill rod (4); the second connecting part (25) is frustoconical, and the outer side of the second connecting part (25) is provided with a second external thread (26) that matches the end internal thread of the casing (5).

10. The drilling guide according to claim 5, characterized in that, A first glove (13) is provided at the end of the first handle (12) away from the first flow guide body (14); a second glove (23) is provided at the end of the second handle (22) away from the second flow guide body (24).

Images