Oil exploration equipment and exploration method

Abstract

The invention provides oil exploration equipment and an exploration method, and relates to the technical field of oil exploration, the oil exploration equipment comprises a drilling machine structure, a well drilling structure, a coring bit, a transmission structure and a traction structure, and a containing cavity communicates with a containing space; the well drilling structure is connected with the drilling machine structure, one end of the well drilling structure is arranged in the containing cavity, and the other end penetrates out of the drilling machine structure. The coring drill bit is connected with the drilling machine structure, the coring drill bit is contained in the containing space, and the coring drill bit is connected with the well drilling structure through the transmission structure; the traction structure is connected with the drilling machine structure and arranged in the containing cavity, and the traction structure is connected with the well drilling structure. The pulling structure is used for pulling the well drilling structure to move along the containing cavity, and the well drilling structure is used for driving the coring drill bit to move through the transmission structure so that the coring drill bit can penetrate out of the drilling machine structure. The technical problem that in the prior art, when coring operation is carried out, a conventional drill bit needs to be taken out to be replaced with a coring drill bit, and then the coring operation is inconvenient is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil exploration, and in particular to oil exploration equipment and an exploration method. Background Art

[0002] Petroleum exploration refers to the process of finding and identifying oil and gas resources by using various exploration methods to understand the underground geological conditions, understand the conditions of oil generation, oil storage, oil and gas migration, accumulation, and preservation, comprehensively evaluate the oil and gas prospects, determine favorable areas for oil and gas accumulation, find oil and gas storage closures, and explore the area of ​​oil and gas fields, and understand the conditions of oil and gas layers and production capacity; coring is an important link in petroleum exploration, which can provide geologists with direct samples of the formation so as to conduct detailed analysis of the generation, migration and storage conditions of oil and gas. Petroleum exploration coring equipment is a drilling tool specially used to extract core samples from underground.

[0003] Existing coring equipment for oil exploration includes a coring drill bit and a drilling rig. The drilling rig is the power source for the entire coring operation. It provides rotation, pressure and lifting force to drive the coring equipment. The coring drill pipe is connected to the end of the drill pipe of the drilling rig. The drill pipe is a pipe that transmits rotation and pressure. It transmits the power of the ground drilling rig to the coring drill bit. The coring drill bit is a key part of the coring equipment. A blade with a special structure is designed at its end. The coring drill bit can cut and capture the core as the drilling rig moves forward.

[0004] At present, when using existing oil exploration coring equipment to drill cores, before reaching the coring layer, it is necessary to first use a conventional drill bit to drill, and then take out the conventional drill bit after reaching the coring layer, and replace the conventional drill bit with a coring drill bit to perform the coring operation again. This method makes the coring process more complicated and leads to slower coring efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a petroleum exploration device and an exploration method to alleviate the technical problem in the prior art that when performing a coring operation, a conventional drill bit needs to be taken out and replaced with a coring drill bit, thereby causing the coring operation to be inconvenient.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a petroleum exploration equipment, including a drilling rig structure, a drilling structure, a coring drill bit, a transmission structure and a pulling structure, wherein the drilling rig structure is provided with a receiving cavity and a receiving space, and the receiving cavity is communicated with the receiving space;

[0008] The drilling structure is connected to the drilling rig structure, and one end of the drilling structure is arranged in the accommodating cavity, and the other end passes through the drilling rig structure;

[0009] The coring drill bit is connected to the drilling rig structure, and the coring drill bit is accommodated in the accommodating space, and the coring drill bit is connected to the drilling structure through the transmission structure;

[0010] The pulling structure is connected to the drilling rig structure and is disposed in the accommodating cavity, and the pulling structure is connected to the drilling structure;

[0011] The pulling structure is used to pull the drilling structure to move along the accommodating cavity, and the drilling structure is used to drive the coring drill bit to move through the transmission structure, so that the coring drill bit passes through the drilling rig structure.

[0012] Further, the drilling structure comprises a drilling drill bit, a drill bit mounting assembly and a pulling assembly, wherein the drill bit mounting assembly is arranged in the accommodating cavity and connected to the drilling rig structure, and one end of the drill bit mounting assembly is connected to the drilling drill bit, and the other end is connected to the pulling assembly;

[0013] One end of the pulling assembly away from the drill bit mounting assembly is connected to the pulling structure, and the pulling assembly is used to push the transmission structure to move, thereby pushing the coring drill bit out of the drilling rig structure through the transmission structure.

[0014] Further, the drill bit mounting assembly comprises a drill bit mounting seat and a first ratchet, one end of the drill bit mounting seat is connected to the drilling drill bit, and the other end is connected to the pulling assembly;

[0015] The first ratchet is connected to the drill bit mounting seat;

[0016] The transmission structure includes a transmission block and a first pawl, wherein the first pawl is connected to the transmission block and is used to pass through the drilling structure and then engage with the first ratchet wheel to fix the transmission block relative to the drilling structure.

[0017] Furthermore, the drilling rig structure is provided with a first abutment block at the cavity wall of the accommodating cavity;

[0018] The drill bit mounting seat is provided with a second abutment block, and the drill bit mounting seat is connected to the first abutment block via the second abutment block.

[0019] Further, the pulling assembly comprises a pulling block and a steel chain, the pulling block is connected to the drill bit mounting seat through the steel chain, and the pulling block is connected to the pulling structure;

[0020] The pulling block is provided with a first wedge-shaped surface;

[0021] The transmission block is provided with a third wedge-shaped surface which is in contact with the first wedge-shaped surface;

[0022] The pulling block pushes the transmission block to move during the movement, and the transmission block pushes the coring drill bit to extend out of the drilling rig structure, and simultaneously drives the first pawl to separate from the first ratchet wheel.

[0023] Further, the coring drill bit is provided with a second wedge-shaped surface;

[0024] The transmission block is also provided with a fourth wedge-shaped surface which is in contact with the second wedge-shaped surface.

[0025] Furthermore, the oil exploration equipment also includes a limiting structure, which is connected to the drilling rig structure, and is used to be connected to the transmission structure in a limiting manner after the pulling block pushes the transmission structure to move.

[0026] Further, the limiting structure includes a connecting member and a second pawl, the connecting member is connected to the drilling rig structure, and the connecting member is connected to the second pawl;

[0027] The transmission structure further includes a second ratchet, the second ratchet is connected to the transmission block, and the second ratchet is engaged with the second pawl.

[0028] Furthermore, the drilling rig structure comprises a threaded drill rod and a mounting sleeve, one end of the threaded drill rod is provided with the mounting sleeve, and the other end of the threaded drill rod is used to connect with an external driving structure;

[0029] The threaded drill rod is provided with the accommodating cavity, and the threaded drill rod is connected to the pulling structure;

[0030] The mounting sleeve is provided with the accommodating space, and the mounting sleeve is connected with the coring drill bit and the limiting structure.

[0031] In a second aspect, the present invention provides an exploration method of oil exploration equipment, comprising:

[0032] S1. After rotating the drilling rig structure and driving the drilling structure to drill underground to the coring layer position, stop drilling;

[0033] S2. The pulling structure drives the drilling structure to move in a direction away from the coring layer, and the drilling structure pushes the transmission structure during the movement, and the transmission structure drives the coring drill bit to extend out of the drilling rig structure;

[0034] S3. Perform coring processing through the coring drill bit, and allow the core sample to enter the accommodating cavity of the drilling rig structure.

[0035] The embodiments of the present invention can achieve the following beneficial effects:

[0036] In a first aspect, the present invention provides a petroleum exploration equipment, including a drilling rig structure, a drilling structure, a coring drill bit, a transmission structure and a pulling structure, wherein the drilling rig structure is provided with a accommodating chamber and an accommodating space, and the accommodating chamber is connected to the accommodating space; the drilling structure is connected to the drilling rig structure, and one end of the drilling structure is arranged in the accommodating chamber, and the other end passes through the drilling rig structure; the coring drill bit is connected to the drilling rig structure, and the coring drill bit is accommodated in the accommodating space, and the coring drill bit is connected to the drilling structure through the transmission structure; the pulling structure is connected to the drilling rig structure and is arranged in the accommodating chamber, and the pulling structure is connected to the drilling structure; the pulling structure is used to pull the drilling structure to move along the accommodating chamber, and the drilling structure is used to drive the coring drill bit to move through the transmission structure, so that the coring drill bit passes through the drilling rig structure.

[0037] In the present invention, the drilling rig structure includes a threaded drill rod, which has an accommodating cavity in its extension direction, that is, the accommodating cavity is preferably a cylindrical space, and the pulling structure includes a driving component and a pulling rope, wherein the driving component includes a driving motor, a driving shaft and a rotating wheel, the driving motor is connected to the inner cavity wall of the threaded drill rod, and the output end of the driving motor is provided with a driving shaft along the radial direction of the threaded drill rod, and the other end of the driving shaft is rotatably connected to the inner wall of the threaded drill rod, and a rotating wheel is provided on the driving shaft, the rotating wheel is preferably provided at the axis center of the threaded drill rod, and a pulling rope is wound around the rotating wheel, and when in use, the driving motor drives the driving shaft and the rotating wheel to rotate, so that the pulling rope is wound around the rotating wheel or released from the rotating wheel. The other end of the pulling rope is connected to the drilling structure, that is, the drilling structure can be lifted along the extension direction of the accommodating chamber by the pulling rope. During the lifting of the drilling structure, the drilling structure pushes the transmission structure radially, so that the transmission structure pushes the coring structure axially, so that the coring structure passes through the drilling rig structure, so that after the drilling structure is retracted, the coring drill bit extends out of the drilling rig structure to coring the coring layer, so that the extracted core enters the accommodating chamber.

[0038] Compared with the prior art, the oil exploration equipment provided by the present invention pulls the drilling structure through the pulling structure arranged in the threaded drill rod so that the drilling structure enters the accommodating cavity. During the movement of the drilling structure, the coring drill bit is driven to extend out of the drilling rig structure through the transmission structure to achieve the effect of replacing the drilling structure with the coring structure.

[0039] In summary, the present invention at least alleviates the technical problem in the prior art that when performing a coring operation, a conventional drill bit needs to be taken out and replaced with a coring drill bit, which leads to inconvenience in the coring operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the overall structure of the oil exploration equipment in the drilling state provided by an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of the overall structure of the oil exploration equipment in the coring state provided by an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of a partial structure of a petroleum exploration device in a drilling state provided by an embodiment of the present invention;

[0044] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0045] Figure 5 A partial structural cross-sectional view of a drill pipe portion of a petroleum exploration device provided by an embodiment of the present invention.

[0046] Icons: 1-drilling rig structure; 11-threaded drill rod; 111-accommodating chamber; 112-first abutment block; 113-slot body; 1131-wedge key; 12-installation sleeve; 121-accommodating space; 2-drilling structure; 21-drilling drill bit; 22-drill bit mounting assembly; 221-drill bit mounting seat; 2211-second abutment block; 222-first ratchet; 23-pulling assembly; 231-pulling block; 23 11-first wedge surface; 232-steel chain; 3-coring drill bit; 31-second wedge surface; 4-transmission structure; 41-transmission block; 411-third wedge surface; 412-fourth wedge surface; 42-second ratchet; 43-first pawl; 5-pulling structure; 51-driving assembly; 511-driving shaft; 512-rotating wheel; 52-pulling rope; 6-limiting structure; 61-connecting piece; 62-second pawl. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0054] Embodiment 1

[0055] This embodiment provides a petroleum exploration equipment, referring to Figure 1 and Figure 2The oil exploration equipment includes a drilling rig structure 1, a drilling structure 2, a coring drill bit 3, a transmission structure 4 and a pulling structure 5. The drilling rig structure 1 is provided with a receiving chamber 111 and a receiving space 121, and the receiving chamber 111 is communicated with the receiving space 121; the drilling structure 2 is connected to the drilling rig structure 1, and one end of the drilling structure 2 is arranged in the receiving chamber 111, and the other end passes through the drilling rig structure 1; the coring drill bit 3 is connected to the drilling rig structure 1, and the coring drill bit 3 is accommodated in the receiving space 121, and the coring drill bit 3 is connected to the drilling structure 2 through the transmission structure 4; the pulling structure 5 is connected to the drilling rig structure 1 and is arranged in the receiving chamber 111, and the pulling structure 5 is connected to the drilling structure 2; the pulling structure 5 is used to pull the drilling structure 2 to move along the receiving chamber 111, and the drilling structure 2 is used to drive the coring drill bit 3 to move through the transmission structure 4, so that the coring drill bit 3 passes through the drilling rig structure 1.

[0056] The embodiments of the present invention at least alleviate the technical problem in the prior art that when performing a coring operation, a conventional drill bit needs to be taken out and replaced with a coring drill bit, thereby causing the coring operation to be relatively inconvenient.

[0057] In an embodiment of the present invention, the drilling rig structure 1 includes a threaded drill rod 11, which has an accommodating chamber 111 extending in its extension direction, that is, the accommodating chamber 111 is preferably a cylindrical space, and the pulling structure 5 includes a driving component 51 and a pulling rope 52, wherein the driving component 51 includes a driving motor, a driving shaft 511 and a rotating wheel 512, the driving motor is connected to the inner cavity wall of the threaded drill rod 11, and the output end of the driving motor is provided with a driving shaft 511 along the radial direction of the threaded drill rod 11, and the other end of the driving shaft 511 is rotatably connected to the inner wall of the threaded drill rod 11, and a rotating wheel 512 is provided on the driving shaft 511, and the rotating wheel 512 is preferably provided at the axis of the threaded drill rod 11, and a pulling rope 52 is wound around the rotating wheel 512. When in use, the driving motor drives the driving shaft 511 and the rotating wheel 512 to rotate, so that the pulling rope 52 is wound around the rotating wheel 512 or released from the rotating wheel 512. The other end of the pulling rope 52 is connected to the drilling structure 2, that is, the drilling structure 2 can be lifted along the extension direction of the accommodating chamber 111 by the pulling rope 52. During the lifting of the drilling structure 2, the drilling structure 2 pushes the transmission structure 4 radially, so that the transmission structure 4 pushes the coring drill bit 3 axially, so that the coring drill bit 3 passes through the drilling rig structure 1, so that after the drilling rig structure 1 is retracted, the coring drill bit 3 extends out of the drilling rig structure 1 to coring the coring layer, so that the extracted core enters the accommodating chamber 111.

[0058] Compared with the prior art, the oil exploration equipment provided in the embodiment of the present invention pulls the drilling structure 2 through the pulling structure 5 arranged in the threaded drill rod 11, so that the drilling structure 2 enters the accommodating chamber 111. During the movement of the drilling rig structure 1, the coring drill bit 3 is driven to extend out of the drilling rig structure 1 through the transmission structure 4, so as to achieve the use effect of replacing the drilling structure 2 with the coring drill bit 3.

[0059] In an optional implementation manner of this embodiment, refer to Figure 3 The drilling structure 2 includes a drilling bit 21, a drill bit mounting assembly 22 and a pulling assembly 23. The drill bit mounting assembly 22 is arranged in the accommodating cavity 111 and is connected to the drilling rig structure 1, and one end of the drill bit mounting assembly 22 is connected to the drilling bit 21, and the other end is connected to the pulling assembly 23; one end of the pulling assembly 23 away from the drill bit mounting assembly 22 is connected to the pulling structure 5, and the pulling assembly 23 is used to push the transmission structure 4 to move, and then push the coring drill bit 3 out of the drilling rig structure 1 through the transmission structure 4.

[0060] Specifically: one end of the drill bit installation assembly 22 is connected to the drilling bit 21, and the other end is connected to the pulling assembly 23. In the drilling state, the drill bit installation assembly 22 and the pulling assembly 23 are both arranged in the accommodating chamber 111, and the drilling bit 21 is arranged on the outside of the drilling rig structure 1; and when the core layer position is drilled, the pulling assembly 23 is pulled up by the pulling rope 52 of the pulling structure 5, so that the pulling assembly 23 pushes the transmission structure 4 to move, and then the transmission structure 4 pushes the coring drill bit 3 out of the accommodating space 121 of the drilling rig structure, and as the pulling assembly 23 is continuously pulled, it also drives the drill bit installation assembly 22 and the drilling bit 21 to move in the direction of the pulling structure 5.

[0061] Further, refer to Figure 3 The drill bit mounting assembly 22 includes a drill bit mounting seat 221 and a first ratchet 222, one end of the drill bit mounting seat 221 is connected to the drilling bit 21, and the other end is connected to the pulling assembly 23; the first ratchet 222 is connected to the drill bit mounting seat 221; the transmission structure 4 includes a transmission block 41 and a first ratchet 43, the first ratchet 43 is connected to the transmission block 41, and the first ratchet 43 is used to pass through the drilling rig structure 1 and then engage with the first ratchet 222 to fix the transmission block 41 relative to the drilling rig structure 1.

[0062] Specifically: the drill bit mounting seat 221 is symmetrically provided with first ratchets 222, and there may be two or four first ratchets 222, and at least two first ratchets 222 are provided on one side of the drill bit mounting seat 221, and the transmission structure 4 may have one group or two groups, and a first pawl 43 is provided on the transmission block 41, and the first pawl 43 is inclined at a specific angle to facilitate engagement with the corresponding first ratchet 222, and the first ratchet 222 can only rotate in one direction, so that the first ratchet 222 can be fixed by the first pawl 43; and the two first ratchets 222 are fixed by the corresponding first pawls 43 at the same time, so as to achieve the purpose of preventing the drilling structure 2 from moving in the direction of the pulling structure 5 through the first pawl 43.

[0063] Further, refer to Figure 4 The drilling rig structure 1 is provided with a first abutting block 112 at the cavity wall of the accommodating cavity 111 ; the drill bit mounting seat 221 is provided with a second abutting block 2211 , and the drill bit mounting seat 221 is connected to the first abutting block 112 via the second abutting block 2211 .

[0064] Specifically: the inner cavity wall of the threaded drill rod 11 is provided with a first abutment block 112, and the first abutment block 112 is preferably connected to the threaded drill rod 11 at one end through a spring, and the bottom surface of the first abutment block 112 is provided with a wedge surface. When in use, the first abutment block 112 abuts against the second abutment block 2211 on the side wall of the drill bit mounting seat 221, so as to form support for the drill bit mounting seat 221 after the first abutment block 112 abuts against the second abutment block 2211; and when the drilling structure 2 moves toward the direction of the pulling structure 5, the drill bit mounting assembly 22 pushes the first abutment block 112 to make it move into the threaded drill rod 11 after compressing the spring.

[0065] In an optional implementation manner of this embodiment, refer to Figure 3 The pulling assembly 23 includes a pulling block 231 and a steel chain 232. The pulling block 231 is connected to the drill bit mounting seat 221 through the steel chain 232, and the pulling block 231 is connected to the pulling structure 5; the pulling block 231 is provided with a first wedge surface 2311; the transmission block 41 is provided with a third wedge surface 411 that fits with the first wedge surface 2311; the pulling block 231 pushes the transmission block 41 to move during the movement, and the transmission block 41 pushes the coring drill bit 3 to extend out of the drilling rig structure 1, and synchronously drives the first pawl 43 to separate from the first ratchet 222.

[0066] Specifically, a steel chain 232 is provided at the bottom of the pulling block 231, and the other end of the steel chain 232 is connected to the drill bit installation assembly 22, and a first wedge surface 2311 is provided on the side of the pulling block 231, and the transmission block 41 is provided with a third wedge surface 411 that fits the first wedge surface 2311. When in use, the pulling block 231 is moved so that the transmission block 41 is pushed away, at which time the first pawl 43 is separated from the first ratchet 222 to release the limit on the drilling structure 2, and after the pulling block 231 moves a certain distance, the steel chain 232 is tightened, and at this time the steel chain 232 pulls the drill bit installation assembly 22 together with the drilling bit 21.

[0067] Further, refer to Figure 4 The coring drill bit 3 is provided with a second wedge-shaped surface 31 ; the transmission block 41 is also provided with a fourth wedge-shaped surface 412 which is in contact with the second wedge-shaped surface 31 .

[0068] Specifically: the coring drill bit 3 is provided with a second wedge surface 31, and the transmission block 41 is also provided with a fourth wedge surface 412 that is in contact with the second wedge surface 31; when in use, the transmission block 41 is moved radially so that the fourth wedge surface 412 is in contact with the second wedge surface 31, and when the transmission block 41 continues to move, the coring drill bit 3 is pushed to move axially along the threaded drill rod 11.

[0069] In an optional implementation manner of this embodiment, refer to Figure 3 The oil exploration equipment further includes a limiting structure 6, which is connected to the drilling rig structure 1, and is used to be connected to the transmission structure 4 after the pulling block 231 pushes the transmission structure 4 to move.

[0070] Specifically: the limiting structure 6 is connected to the inner wall of the mounting sleeve 12 of the drilling rig structure 1, and the limiting structure 6 is arranged in the accommodating space 121, and after the pulling block 231 pushes the transmission structure 4 to move, the transmission structure 4 is connected to the limiting structure 6, thereby realizing the limiting of the transmission structure 4, so that the transmission structure 4 can continuously push the coring drill bit 3, thereby making the coring drill bit 3 continuously located outside the drilling rig structure 1.

[0071] Further, refer to Figure 3 The limiting structure 6 includes a connecting member 61 and a second pawl 62, the connecting member 61 is connected to the drilling structure 1, and the connecting member 61 is connected to the second pawl 62; the transmission structure 4 also includes a second ratchet 42, the second ratchet 42 is connected to the transmission block 41, and the second ratchet 42 is engaged with the second pawl 62.

[0072] Specifically: the connecting piece 61 is connected to the inner wall of the mounting sleeve 12, and a second pawl 62 is provided on the connecting piece 61. The second pawl 62 is used to engage with the second ratchet 42 when the transmission block 41 is close to the connecting piece 61, thereby fixing the transmission block 41 relative to the connecting piece 61, so that the transmission block 41 continues to maintain abutment against the coring drill bit 3, so that the exploration equipment is in a coring state.

[0073] Further, refer to Figure 1 or Figure 2 The drilling rig structure 1 includes a threaded drill rod 11 and a mounting sleeve 12. The mounting sleeve 12 is provided at one end of the threaded drill rod 11, and the other end of the threaded drill rod 11 is used to connect with an external driving structure; the threaded drill rod 11 is provided with a accommodating chamber 111, and the threaded drill rod 11 is connected to the pulling structure 5; the mounting sleeve 12 is provided with an accommodating space 121, and the mounting sleeve 12 is connected to the coring drill bit 3 and the limiting structure 6.

[0074] Specifically: a mounting sleeve 12 is provided at one end of the threaded drill rod 11, the mounting sleeve 12 is sleeved on the outside of the threaded drill rod 11, and a thread is provided on the outer wall of the mounting sleeve 12; and the mounting sleeve 12 is slidingly connected to the coring drill bit 3, and is fixedly connected to the limiting structure 6, and the transmission structure 4 is accommodated between the mounting sleeve 12 and the threaded drill rod 11.

[0075] It should be noted that, refer to Figure 5 A groove 113 is provided on the inner wall of the threaded drill rod 11, and a wedge key 1131 is provided in the groove 113, and an inclined surface is provided on the wedge key 1131; when in use, during the process of lifting the core, the inclined core can be sunk into the groove formed by the wedge key 1131 to clamp the core.

[0076] Embodiment 2

[0077] This embodiment provides an exploration method of oil exploration equipment, comprising:

[0078] S1. After rotating the drilling rig structure 1 and driving the drilling structure 2 to drill underground to the coring layer position, stop drilling;

[0079] S2. The pulling structure 5 drives the drilling structure 2 to move in a direction away from the coring layer. The drilling structure 2 pushes the transmission structure 4 during the movement, and the transmission structure 4 drives the coring drill bit 3 to extend out of the drilling rig structure 1;

[0080] S3. Perform coring processing through the coring drill bit 3 and allow the core sample to enter the accommodating cavity 111 of the drilling rig structure 1.

[0081] Specifically: when in use, the drilling rig structure 1 is first rotated to drill the drilling bit 21 into the underground coring layer, and then the drilling structure 2 is lifted up by the pulling structure 5. In the process of lifting the drilling structure 2, it drives the transmission structure 4 to move, and then drives the coring drill bit 3 to move downward through the transmission structure 4 until it extends out of the installation sleeve 12. At this time, the switching from the drilling state to the coring state is realized. Since the drilling structure 2 is continuously lifted up, space is made in the accommodating chamber 111 for the removed core. During the coring process, the removed core enters the accommodating chamber 111 for retention.

[0082] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. A petroleum exploration equipment, characterized in that: The drilling rig comprises a drilling rig structure (1), a drilling structure (2), a coring drill bit (3), a transmission structure (4) and a pulling structure (5); the drilling rig structure (1) is provided with a receiving chamber (111) and a receiving space (121); the receiving chamber (111) is connected to the receiving space (121); The drilling structure (2) is connected to the drilling rig structure (1), and one end of the drilling structure (2) is arranged in the accommodating cavity (111), and the other end passes through the drilling rig structure (1); The coring drill bit (3) is connected to the drilling rig structure (1), and the coring drill bit (3) is accommodated in the accommodation space (121); the coring drill bit (3) is connected to the drilling structure (2) via the transmission structure (4); The pulling structure (5) is connected to the drilling rig structure (1) and is arranged in the accommodating cavity (111), and the pulling structure (5) is connected to the drilling structure (2); The pulling structure (5) is used to pull the drilling structure (2) to move along the accommodating cavity (111), and the drilling structure (2) is used to drive the coring drill bit (3) to move through the transmission structure (4), so that the coring drill bit (3) passes through the drilling rig structure (1).

2. The oil exploration equipment according to claim 1, characterized in that: The drilling structure (2) comprises a drilling bit (21), a drill bit mounting assembly (22) and a pulling assembly (23); the drill bit mounting assembly (22) is arranged in the accommodating cavity (111) and connected to the drilling rig structure (1); one end of the drill bit mounting assembly (22) is connected to the drilling bit (21), and the other end is connected to the pulling assembly (23); One end of the pulling assembly (23) away from the drill bit mounting assembly (22) is connected to the pulling structure (5), and the pulling assembly (23) is used to push the transmission structure (4) to move, thereby pushing the coring drill bit (3) out of the drilling rig structure (1) through the transmission structure (4).

3. The oil exploration equipment according to claim 2, characterized in that: The drill bit mounting assembly (22) comprises a drill bit mounting seat (221) and a first ratchet (222); one end of the drill bit mounting seat (221) is connected to the drilling drill bit (21), and the other end is connected to the pulling assembly (23); The first ratchet (222) is connected to the drill bit mounting seat (221); The transmission structure (4) comprises a transmission block (41) and a first ratchet (43), wherein the first ratchet (43) is connected to the transmission block (41), and the first ratchet (43) is used to pass through the drilling structure (1) and then engage with the first ratchet (222), so that the transmission block (41) is fixed relative to the drilling structure (1).

4. The oil exploration equipment according to claim 3, characterized in that: The drilling rig structure (1) is provided with a first abutment block (112) at the cavity wall of the accommodating cavity (111); The drill bit mounting seat (221) is provided with a second abutment block (2211), and the drill bit mounting seat (221) is connected to the first abutment block (112) via the second abutment block (2211).

5. The oil exploration equipment according to claim 3, characterized in that: The pulling assembly (23) comprises a pulling block (231) and a steel chain (232); the pulling block (231) is connected to the drill bit mounting seat (221) via the steel chain (232), and the pulling block (231) is connected to the pulling structure (5); The pulling block (231) is provided with a first wedge-shaped surface (2311); The transmission block (41) is provided with a third wedge-shaped surface (411) that is in contact with the first wedge-shaped surface (2311); The pulling block (231) pushes the transmission block (41) to move during the movement, and enables the transmission block (41) to push the coring drill bit (3) out of the drilling rig structure (1), and simultaneously drives the first ratchet pawl (43) to separate from the first ratchet wheel (222).

6. The oil exploration equipment according to claim 5, characterized in that: The coring drill bit (3) is provided with a second wedge surface (31); The transmission block (41) is also provided with a fourth wedge-shaped surface (412) that fits the second wedge-shaped surface (31).

7. The oil exploration equipment according to claim 5, characterized in that: It also includes a limiting structure (6), which is connected to the drilling rig structure (1), and is used to be connected to the transmission structure (4) in a limiting manner after the pulling block (231) pushes the transmission structure (4) to move.

8. The oil exploration equipment according to claim 7, characterized in that: The limiting structure (6) comprises a connecting member (61) and a second ratchet (62), wherein the connecting member (61) is connected to the drilling rig structure (1), and the connecting member (61) is connected to the second ratchet (62); The transmission structure (4) further comprises a second ratchet (42), wherein the second ratchet (42) is connected to the transmission block (41), and the second ratchet (42) is engaged with the second pawl (62).

9. The oil exploration equipment according to claim 8, characterized in that: The drilling rig structure (1) comprises a threaded drill rod (11) and a mounting sleeve (12), one end of the threaded drill rod (11) is provided with the mounting sleeve (12), and the other end of the threaded drill rod (11) is used to be connected to an external driving structure; The threaded drill rod (11) is provided with the accommodating cavity (111), and the threaded drill rod (11) is connected to the pulling structure (5); The mounting sleeve (12) is provided with the accommodating space (121), and the mounting sleeve (12) is connected to the coring drill bit (3) and the limiting structure (6).

10. The exploration method of oil exploration equipment according to claim 1, characterized in that: include: S1. rotating the drilling rig structure (1) and driving the drilling structure (2) to drill underground to the coring layer position, and then stopping drilling; S2. The pulling structure (5) drives the drilling structure (2) to move in a direction away from the coring layer, and the drilling structure (2) pushes the transmission structure (4) during the movement, and the transmission structure (4) drives the coring drill bit (3) to extend out of the drilling rig structure (1); S3. Perform coring processing through the coring drill bit (3), and allow the core sample to enter the accommodating cavity (111) of the drilling rig structure (1).

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