A super high deflection rate power drilling tool

Abstract

The present invention discloses a super-high deflection rate power drilling tool, which relates to the technical field of drilling tools for petroleum, coal mines and exploration, and comprises a drilling tool body and a transmission assembly arranged in the drilling tool body, wherein the drilling end of the transmission assembly is connected to a drill bit; the drilling tool body has at least one swinging assembly that can swing relative to each other or / and the drill rod connecting end of the drilling tool body is connected to a swinging assembly, and the drilling tool body may also have a fixed bending point. The present invention does not need to separately connect other types of hinges or bend joints outside the drilling tool, which can not only ensure the integrity of the tool and the passability of drilling, but also change the curvature of the drilling tool body when applying drilling pressure during the drilling process, and the maximum deflection rate can reach 90° / 30m, or even higher 90° / 15m, which greatly improves the drilling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools for petroleum, coal mine and exploration, and in particular to an ultra-high deflection rate power drilling tool. Background Art

[0002] As oilfield development enters the middle and late stages, the remaining oil in the original well or nearby cannot be recovered due to engineering factors such as casing damage, or after the detailed description of the block, the geological factors such as the potential for increased production are re-recognized. Drilling additional wells or new wells to recover the enriched oil will significantly increase the cost of oil recovery. Using the original well casing and existing ground facilities to open windows and side drilling can ensure stable and increased production of the oilfield. By opening windows, long well sections and large displacement wells can be drilled to recover the remaining oil or new blocks that cannot be recovered from the original wellbore.

[0003] The so-called window sidetracking is a new technology and process that uses the old wellbore to effectively mobilize the remaining oil near the old well, fully utilizes the original production and transportation equipment of the old well, and fully utilizes the production potential of the reservoir. It can not only extend the production "life" of the old well and increase crude oil production, but also use the old wellbore to significantly reduce investment costs, shorten construction cycles, and improve comprehensive benefits.

[0004] This technology has been widely promoted and applied in oil fields across the country, and has achieved significant economic and social benefits. It has become an important means and measure for increasing efficiency, saving money and tapping potential in oil fields, especially in old oil fields.

[0005] Commonly used guide screw drilling tools are drilling tools used for inclination. In order to drill a wellbore with a certain inclination and azimuth and control the trajectory of the wellbore, the guide screw drilling tool has a certain curvature. The universal shaft housing of the guide screw drilling tool is designed as a curved housing, generally with a curvature of 0 to 3°, to achieve a certain inclination rate requirement; and the guide screw drilling tool is divided into a single-bend screw drilling tool and an adjustable-bend screw drilling tool. The structural bending angle of the single-bend screw drilling tool is fixed. When the curvature radius of different well sections varies greatly, the screw drilling tool needs to be replaced to achieve different inclination rate requirements; the adjustable-bend screw drilling tool can adjust the bending angle of the screw drilling tool at will on the drilling platform to obtain a satisfactory inclination rate. The larger the adjustment angle, the smaller the curvature radius, the greater the inclination rate, and the better the oil recovery rate.

[0006] However, the existing adjustable bent screw drilling tools have their bending angles adjusted before being lowered into the well according to the drilling conditions, i.e., the drilling tools have a fixed curvature when being lowered into the well, and the shortest radius of directional guidance of the existing adjustable bent screw drilling tools can only reach 15° / 30m, and in small wells it does not exceed 18° / 30m. For oil production sites close to the vertical well, the curvature radius of the current adjustable bent screw drilling tools is still relatively large, and the inclination rate still cannot meet the demand. Summary of the invention

[0007] The purpose of the present invention is to provide a super-high inclination rate power drilling tool, which can not only ensure the integrity of the tool and the passability of the drill bit, but also change the curvature of the drill bit body when the drilling pressure is applied during the drilling process, and the maximum inclination rate can reach 90° / 30m, or even higher 90° / 15m.

[0008] In order to achieve the purpose of the present invention, the technical solution adopted is: an ultra-high inclination rate power drilling tool, including a drill tool body and a transmission assembly arranged in the drill tool body, and the drilling end of the transmission assembly is connected to a drill bit; the drill tool body has at least one swinging component that can swing relative to each other or / and the drill rod connecting end of the drill tool body is connected to a swinging component, and the drill tool body may also have a fixed bending point.

[0009] Furthermore, the swing assembly includes an upper joint and a lower joint, and the upper joint and the lower joint are jointly sleeved with an articulated sleeve, and at least one transversely assembled pin is installed on the articulated sleeve. The outer wall of the upper joint and / or the lower joint is also provided with a guide groove that cooperates with the pin, and the inner wall of the articulated sleeve also has an avoidance surface for the upper joint and / or the lower joint to swing; the upper joint and / or the lower joint is also sleeved with a sealing piece that seals the end face of the articulated sleeve.

[0010] Furthermore, at least one arc-shaped section is provided in the articulated sleeve, and the plug-in end of the upper joint and / or the lower joint has a matching surface matching with the arc-shaped section.

[0011] Furthermore, a sealing member is embedded on the arc-shaped section.

[0012] Furthermore, the outer side of the plug-in end of the upper joint and / or the lower joint also has a ball head, and the inner wall of the hinged sleeve has a ball socket that cooperates with the ball head.

[0013] Furthermore, an articulated seat is provided in the articulated sleeve, and the arc-shaped section is the end surface of the articulated seat.

[0014] Furthermore, one end or both ends of the articulated sleeve are arc-shaped cutouts, and one end of the blocking member is a sealing arc surface that matches the arc-shaped cutout.

[0015] Furthermore, the swing angle of the upper joint or the lower joint is 0° to 5°.

[0016] Furthermore, the outer wall of the hinge sleeve is also provided with wear-resistant teeth.

[0017] Furthermore, the other ends of the upper joint and the lower joint are both provided with connecting threads.

[0018] The beneficial effects of the present invention are:

[0019] The present invention improves the structure of the drill tool body so that the internal structure of the drill tool body retains the universal shaft assembly inside the original screw drill tool or turbine drill tool, so that the present invention can maintain a vertical and curvature-free state before going down the well. When the set well depth is reached, as the drilling pressure continues to increase, the drill tool body forms a fulcrum at the drill bit installed at the drilling end. The drill tool body will change the curvature of the drill tool body through one or more swing components according to the preset bending angle direction before going down the well, and the maximum inclination rate can reach 90° / 30m, or even 90° / 15m. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the ultra-high build-up rate power drilling tool provided by the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of the middle swing assembly;

[0022] Figure 3 yes Figure 1 A cross-sectional view of the middle swing assembly;

[0023] Figure 4 yes Figure 1 A longitudinal section of the middle swing assembly;

[0024] Figure 5 It is another structural diagram of an implementation of the present invention.

[0025] Markings and corresponding parts names in the attached drawings:

[0026] 1. Drilling tool body, 2. Swinging assembly, 3. Fixed bending point;

[0027] 201, upper joint, 202, lower joint, 203, hinged sleeve, 204, pin shaft, 205, guide groove, 206, avoidance surface, 207, blocking member, 208, hinged seat;

[0028] 2021, mating surface, 2022, ball head;

[0029] 2031, arc incision;

[0030] 2071, sealing arc surface;

[0031] 2081. arc-shaped section, 2082. sealing element, 2083. ball and socket part, 2084. wear-resistant teeth. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0033] like Figure 5As shown, the present invention provides an ultra-high inclination rate power drilling tool, including a drill body 1 and a transmission assembly arranged in the drill body 1, the drilling end of the transmission assembly is connected to a drill bit, the transmission assembly is a direct use of the flexible shaft type universal shaft assembly in the existing screw drill, and the installation method of the transmission assembly in the drill body 1 is the same as the installation method of the existing flexible shaft type universal shaft assembly in the existing drill body 1; the drill body 1 has at least one swinging assembly 2 that can swing relatively, or the swinging assembly 2 does not move when not subjected to external force, so that the drill body 1 maintains a vertical state without curvature when not drilling, and during the drilling process of the drill, the swing assembly 2 automatically changes the curvature after being subjected to external force, so that the drill body 1 can automatically change the curvature during the drilling process, and a fixed bending point 3 can also be set on the drill body 1, through the cooperation of multiple swinging assemblies 2 and fixed bending points 3 on the drill body 1, the shortest radius directional guidance of the drill can reach 90° / 30m, or even higher 90° / 15m.

[0034] The swing angle of the swing component 2 in the present invention is 0° to 10°. When one of the upper joint 201 or the lower joint 202 swings, the relative swing angle of the upper joint 201 or the lower joint 202 is 0° to 5°, and the curvature of the fixed bending point 3 is 1° to 3°. At the same time, the setting of the fixed bending point 3 can also be cancelled on the drill body 1 in the present invention. At this time, the drill can directly cooperate with multiple swing components 2 during the drilling process to enable the shortest radius directional guidance of the drill to reach 90° / 30m, or even higher 90° / 15m.

[0035] In some embodiments, Figure 2 , Figure 3 , Figure 4 As shown, the swing assembly 2 includes an upper joint 201 and a lower joint 202 that are butt-jointed, and the other ends of the upper joint 201 and the lower joint 202 are fixedly connected to the drill body 1. When there are multiple swing assemblies 2, the next upper joint 201 can be directly fixedly connected to the previous lower joint 202. At this time, the next upper joint 201 and the previous lower joint 202 can be directly fixedly connected or directly set into an integrated structure.

[0036] The upper joint 201 and the lower joint 202 are both covered with a hinge sleeve 203, so that the butt ends of the upper joint 201 and the lower joint 202 are inserted into the hinge sleeve 203, and the hinge sleeve 203 At least one transversely assembled pin 204 is installed inside, and the extension direction of the pin 204 is tangent to the inner wall of the hinge sleeve 203. When one of the upper joint 201 or the lower joint 202 can swing, there is one pin 204, and when both the upper joint 201 and the lower joint 202 can swing, there are two pins 204; the extension direction of the pin 204 is tangent to the inner wall of the outer hinge sleeve 203, and the outer wall of the upper joint 201 and / or the lower joint 202 is also provided with a guide groove 205 that cooperates with the outer wall of the pin 204. The pin 204 can not only prevent the upper joint 201 and / or the lower joint 202 from axially moving in the hinge sleeve 203, but also limit the swing of the upper joint 201 or the lower joint 202 with the pin 204 as the center point when the upper joint 201 or the lower joint 202 swings.

[0037] The inner wall of the articulated sleeve 203 also has an avoidance surface 206 for the upper joint 201 and / or the lower joint 202 to swing. The avoidance surface 206 is a concave surface, and the avoidance surface 206 is located on the swinging side of the upper joint 201 or the lower joint 202, so that the gap between the upper joint 201 or the lower joint 202 and the inner wall of the articulated sleeve 203 in the swinging direction is larger, which facilitates the upper joint 201 and / or the lower joint 202 to swing relative to the articulated sleeve 203; at the same time, since the gap between the inner wall of the articulated sleeve 203 and the outer walls of the upper joint 201 and the lower joint 202 is large, in order to ensure the sealing of the swing assembly 2, the upper joint 201 The upper joint 201 or / and the lower joint 202 is also provided with a sealing piece 207 for sealing the end face of the articulated sleeve 203, and the sealing piece 207 is fixed to the upper joint 201 or / and the lower joint 202 by screws or threads, so that the upper joint 201 or / and the lower joint 202 is always in a closed state during the swing relative to the articulated sleeve 203, which can effectively prevent the leakage of drilling fluid and effectively prevent the mud on the outside of the drill tool body 1 from entering the gap between the upper joint 201 or / and the lower joint 202 and the articulated sleeve 203, avoiding affecting the swing of the upper joint 201 or the lower joint 202, and effectively reducing the wear of the upper joint 201 or the lower joint 202 due to large friction during the swing process.

[0038] In some embodiments, at least one arcuate section 2081 is further provided in the articulated sleeve 203, and the plug-in end of the upper joint 201 or / and the lower joint 202 has a mating surface 2021 that matches the arcuate section 2081, and the high end of the arcuate section 2081 matches the low end of the mating surface 2021, and the low end of the arcuate section 2081 matches the high end of the mating surface 2021; through the cooperation between the arcuate section 2081 and the mating surface 2021, the arcuate section 2081 and the mating surface 2021 are always kept in sealing contact with each other during the swinging process of the upper joint 201 or the lower joint 202; at the same time, due to the limitation of the swinging angle of the upper joint 201 or / and the lower joint 202, the upper joint 201 or / and the lower joint 202 is During the swinging process of the upper joint 201 or the lower joint 202, the matching surface 2021 and the arc section 2081 will not be completely offset, so that during the swinging process of the upper joint 201 or the lower joint 202, the matching surface 2021 and the arc section 2081 always maintain a sealed fit, which not only enables the transmission assembly in the drill tool body 1 to maintain transmission normally, but also effectively prevents the mud located between the inner wall of the drill tool body 1 and the transmission assembly from passing through the matching surface 2021 and the arc section 2081 into the gap between the upper joint 201 or / and the lower joint 202 and the articulated sleeve 203, thereby preventing the mud and sand in the mud from increasing the wear between the upper joint 201 or / and the lower joint 202 and the articulated sleeve 203.

[0039] In some embodiments, a seal 2082 is also embedded on the arcuate section 2081 to improve the sealing effect between the arcuate section 2081 and the mating surface 2021; at the same time, the seal 2082 is a rubber sealing ring or other types of seals, and there may be multiple seals 2082 on the arcuate section 2081, and the multiple seals 2082 are radially spaced to improve the sealing effect between the arcuate section 2081 and the mating surface 2021.

[0040] In some embodiments, the outer side of the plug-in end of the upper joint 201 and / or the lower joint 202 also has a ball head 2022, and the ball head 2022 is located on the outer side of the bending direction of the upper joint 201 or the lower joint 202, and the inner wall of the articulated sleeve 203 has a ball socket portion 2083 that cooperates with the ball head 2022. In order to ensure the strength of the articulated sleeve 203, the thickness of the articulated sleeve 203 can be kept uniform; through the cooperation between the ball head 2022 and the ball socket portion 2083, and because the ball head 2022 does not completely cover the plug-in end of the upper joint 201 or the lower joint 202, not only the swinging direction of the upper joint 201 or the lower joint 202 can be restricted, but also the friction between the plug-in end of the upper joint 201 or the lower joint 202 and the articulated sleeve 203 can be effectively reduced, making the swinging of the upper joint 201 or the lower joint 202 more convenient.

[0041] In some embodiments, an articulated seat 208 is also fixedly installed in the articulated sleeve 203, and the outer wall of the articulated seat 208 is sealed and matched with the inner wall of the articulated sleeve 203. When one of the upper joint 201 or the lower joint 202 can swing relative to the articulated sleeve 203, the end face of the articulated seat 208 and the upper joint 201 and the lower joint 202 are connected to the arc section 2081. When the upper joint 201 and the lower joint 202 can both swing relative to the articulated sleeve 203, the end faces of both ends of the articulated seat 208 are arc sections 2081; at the same time, when the upper joint 201 and the lower joint 202 can both swing, there can be two articulated seats 208. At this time, the two articulated seats 208 are sealed and connected, and the ends of the two articulated seats 208 that are connected to the upper joint 201 and the lower joint 202 are arc sections 2081. By installing the hinge seat 208, while ensuring the sealed connection between the upper joint 201 and the lower joint 202, the upper joint 201 and / or the lower joint 202 can be swung in the hinge seat 208, making the swing of the upper joint 201 and / or the lower joint 202 more convenient and smooth.

[0042] In some embodiments, one or both ends of the articulated sleeve 203 are arc-shaped cutouts 2031, the center of the arc-shaped cutout 2031 coincides with the center of the arc-shaped section 2081, and the end surface of the blocking member 207 that is connected to the arc-shaped cutout 2031 is a sealing arc surface 2071. Since the blocking member 207 is fixed to the upper joint 201 or the lower joint 202, when the upper joint 201 or the lower joint 202 swings, the blocking member 207 moves with the upper joint 201 or the lower joint 202. 2 synchronously moves, so that the sealing arc surface 2071 and the arc cutout 2031 produce relative displacement. Since the arc cutout 2031 and the sealing arc surface 2071 are both arc-shaped and their centers coincide, the sealing arc surface 2071 and the arc cutout 2031 always maintain a sealed fit during the relative displacement, so that during the swinging process of the upper joint 201 or the lower joint 202, the blocking member 207 always seals the end surface of the hinged sleeve 203, so that the upper joint 201 or the lower joint 202 During the swinging process, external mud and sand cannot enter the gap between the inner wall of the articulated sleeve 203 and the outer wall of the upper joint 201 or the lower joint 202, thereby preventing mud and sand from entering the gap between the inner wall of the articulated sleeve 203 and the outer wall of the upper joint 201 or the lower joint 202 to increase friction, and effectively preventing the plug-in end of the upper joint 201 or the lower joint 202 from being worn; at the same time, the arc-shaped incision 2031 or the sealing arc surface 2071 can also be embedded with a sealing ring to improve the sealing degree between the arc-shaped incision 2031 and the sealing arc surface 2071, so that the sealing effect of the end face of the articulated sleeve 203 is better.

[0043] In some embodiments, the outer wall of the articulated sleeve 203 is further provided with wear-resistant teeth 2084, which can be located corresponding to the ball socket 2083, so that the drill body 1 can protect the bending point of the drill after bending during the drilling process, thereby ensuring the normal operation of the drill.

[0044] In some embodiments, the other ends of the upper joint 201 and the lower joint 202 are both fixedly connected to the drill body 1, and the other ends of the upper joint 201 and the lower joint 202 are both provided with connecting threads, making the connection between the upper joint 201 and the drill body 1 more convenient.

[0045] The present invention is different from the adjustable bent screw drill in the prior art. The present invention is in a vertical state without curvature at the swing assembly 2 of the drill body 1 before going down the well. When the set well depth is reached, as the drilling pressure continues to increase, the drill body 1 forms a fulcrum at the drill bit installed at the drilling end. The drill body 1 will change the curvature of the drill body 1 through one or more swing assemblies 2 according to the preset bending angle direction before going down the well, so that the maximum inclination rate can reach 90° / 30m, or even 90° / 15m. In the present invention, the universal shaft assembly and the transmission assembly are still installed in the drill body 1, without adding other auxiliary articulated structures or bent joints, so that the integrity and safety of the drill body 1 are guaranteed during the drilling process of the present invention, and the passability of the drill is guaranteed, and the overall length of the drill is not increased, so that the drilling efficiency and drilling quality of the present invention are greatly improved.

[0046] The swing assembly 2 of the present invention can also be directly connected to the drill rod connection end of the drilling tool body 1, for example Figure 1 As shown, at this time, the remaining parts of the drill tool body 1 can also be equipped with a swing assembly 2, the remaining parts of the drill tool body 1 can also be equipped with a fixed bending point 3, and the remaining parts of the drill tool body 1 can also be equipped with a swing assembly 2 and a fixed bending point 3 at the same time.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-high build-up rate power drilling tool, characterized in that: The invention comprises a drilling tool body (1) and a transmission assembly arranged in the drilling tool body (1), wherein the drilling end of the transmission assembly is connected to a drill bit; the drilling tool body (1) has at least one swinging assembly (2) which can swing relative to each other or / and the drill rod connecting end of the drilling tool body (1) is connected to the swinging assembly (2), and the drilling tool body (1) may also have a fixed bending point (3); the swinging assembly (2) comprises an upper joint (201) and a lower joint (202), the upper joint (201) and the lower joint (202) are sleeved with a hinge sleeve (203) on the outside, at least one transversely mounted pin shaft (204) is installed on the hinge sleeve (203), and the upper joint (201) and / or the lower joint are sleeved with a hinge sleeve (203) on the outside. The outer wall of the joint (202) is also provided with a guide groove (205) cooperating with the pin shaft (204), and the inner wall of the hinged sleeve (203) is also provided with an avoidance surface (206) for the upper joint (201) or / and the lower joint (202) to swing; the upper joint (201) or / and the lower joint (202) is also sleeved with a sealing member (207) for sealing the end face of the hinged sleeve (203); one end or both ends of the hinged sleeve (203) are arc-shaped cutouts (2031), and one end of the sealing member (207) is a sealing arc surface (2071) cooperating with the arc-shaped cutout (2031); the swing angle of the upper joint (201) or the lower joint (202) is 0° to 5°.

2. The ultra-high build-up rate power drilling tool according to claim 1, characterized in that: At least one arc-shaped section (2081) is also provided in the articulated sleeve (203), and the plug-in end of the upper joint (201) or / and the lower joint (202) has a matching surface (2021) that matches the arc-shaped section (2081).

3. The ultra-high build-up rate power drilling tool according to claim 2, characterized in that: A sealing member (2082) is also embedded on the arc-shaped section (2081).

4. The ultra-high build-up rate power drilling tool according to claim 2, characterized in that: A hinge seat (208) is also provided inside the hinge sleeve (203), and the arc-shaped section (2081) is the end surface of the hinge seat (208).

5. The ultra-high build-up rate power drilling tool according to claim 1, characterized in that: The outer side of the plug-in end of the upper joint (201) or / and the lower joint (202) also has a ball head (2022), and the inner wall of the hinge sleeve (203) has a ball socket (2083) that cooperates with the ball head (2022).

6. The ultra-high build-up rate power drilling tool according to claim 1, characterized in that: The outer wall of the hinge sleeve (203) is also provided with wear-resistant teeth (2084).

7. The ultra-high build-up rate power drilling tool according to claim 1, characterized in that: The other ends of the upper joint (201) and the lower joint (202) are both provided with connecting threads.

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