CN220226716U - Shaped charge hole forming tool for geological exploration - Google Patents

Abstract

The utility model belongs to the field of drilling equipment for petroleum, natural gas, geological exploration and the like, and relates to a shaped charge hole forming tool for geological exploration. The half buckle comprises an upper half buckle and a lower half buckle, the central cylinder is arranged inside the shell and is connected with the spline of the shell, and the spring is arranged between the spring baffle ring and the lower joint. The reaming cutter mainly comprises a cutter body, cutting teeth and a cutter rest, wherein the cutter body is connected with the cutter rest through a connecting pin, the cutting teeth are embedded and installed on the cutter body, and the cutter rest is installed on a stepped groove of the shell through a bolt. According to the utility model, the reaming while drilling tool is combined with the exploration drilling equipment, stepped boreholes with different apertures are drilled according to the requirements by increasing the weight on bit and the torque, so that sound waves are radially transmitted in a horn shape (conical shape) when the filled explosive explodes step by step, and the exploration efficiency is greatly improved.

Description

Shaped charge hole forming tool for geological exploration

Technical Field

The utility model belongs to the field of drilling equipment for petroleum, natural gas, geological exploration and the like, and relates to a shaped charge hole forming tool for geological exploration.

Background

The current drilling tool for geological exploration only can drill a vertical single well hole, the drilling hole diameter is too single, accidents are easy to occur when the geological structure is complex, the exploration purpose is difficult to achieve, multiple practices are needed, and the problems of high cost, low efficiency and the like are caused. The shaped charge hole forming tool for geological exploration can be combined with exploration drilling equipment by using a reaming while drilling tool, stepped wellbores with different apertures can be drilled according to requirements, and the step-by-step reaming can enable sound waves to be transmitted in a horn shape (conical shape) in radial mode when filled explosive explodes, so that exploration efficiency is greatly improved. The shaped charge hole is formed on the premise of realizing step-by-step reaming, and the superior related technology at home and abroad is reaming while drilling, so that the technology can effectively improve the exploration efficiency of an oil and gas well, optimize the well structure of exploration drilling, reduce the overall exploration cost and the like.

Disclosure of Invention

The utility model aims to provide a shaped charge hole forming tool for geological exploration, which solves the problems of geological exploration efficiency and reaming while drilling in the prior art. By increasing the weight and torque, the reaming while drilling step by step can be realized.

The technical scheme adopted by the utility model is as follows:

the utility model relates to a shaped charge hole forming tool for geological exploration, which mainly comprises a half buckle, a shell, a central cylinder, a reaming cutter and a lower joint. The method is characterized in that: the half buckle comprises an upper half buckle and a lower half buckle, and the upper half buckle and the lower half buckle are connected through a screw; three stepped grooves uniformly distributed in the circumferential direction are processed on the shell, and an internal spline is processed inside the shell; the central cylinder is arranged in the shell and is in spline connection with the shell, the lower end of the central cylinder is in threaded connection with the spring baffle ring, and the spring is arranged between the spring baffle ring and the lower joint; the reaming cutter mainly comprises a cutter body, cutting teeth and a cutter rest, wherein the cutter body is connected with the cutter rest through a connecting pin, the cutting teeth are embedded and installed on the cutter body, and the cutter rest is installed on a stepped groove of the shell through a bolt.

The shaped charge hole forming tool for geological exploration in the scheme has the advantages that the upper end connector of the central cylinder is connected with the drill string, the upper portion of the central cylinder is cylindrical, external splines are machined on the surface, the middle section of the central cylinder is regular hexagon, inclined tooth grooves are machined on the surface of 3 intervals, 3 runner holes are machined on the surface of the lower portion of the central cylinder, chips can be discharged in time when geological exploration reaming drills, and the situation that blades are clamped due to settlement of rock chips is avoided.

According to the shaped charge hole forming tool for geological exploration, 120-degree uniformly distributed on the circumferential direction of the reaming tool is arranged on the stepped groove of the shell, gears and cutting teeth are machined on the cutter body, the inclination angle of the cutting teeth is 4-7 degrees inclined outwards, the inclination angle of the cutter body is 4-7 degrees inclined back to the direction of the gears, circulation of cutting scraps is facilitated, the number of cutting teeth is 15-17, the distribution positions of the cutting teeth on each cutter body are different, the top of the cutter body is of a circular arc structure, the coverage surface of the cutting teeth is ensured, and meanwhile, the same-track tooth distribution mode is used, so that the reaming speed is improved.

The shaped charge hole forming tool for geological exploration in the scheme can select the length of the half buckle according to different exploration requirements, so that the stepped aperture is realized or the maximum reaming diameter of the tool is limited.

Compared with the prior art, the utility model has the beneficial effects that: 1. the opening of the reamer body is controlled by utilizing the structure of matching the internal and external splines of the central cylinder and the shell and the mutual meshing transmission of gears. The structure can ensure that the reamer body does not retract under the condition of pressure, the aperture obtained during drilling can be changed step by step according to the requirement, horn-shaped expansion is formed, and the reamer body can be automatically recovered after the reaming task is completed. 2. The progressive reaming can make the sound wave form "horn" (conical) radial transmission when the filled explosive explodes, greatly improving the exploration efficiency. 3. Alloy steel is selected as the material of the reaming cutter body, the hard alloy cutting teeth are inlaid on the reaming cutter body, the top of the reaming cutter body adopts a circular arc structure, the same-track tooth distribution mode is used while the coverage of the cutting teeth is ensured, and the reaming speed is improved. 4. The three-cutter structure is adopted to transmit torque, and is simple, convenient, safe and reliable. 5. 3 runner holes are processed at the opening position of the cutter at the lower part of the central cylinder, so that chips can be discharged timely during reaming and drilling, and the situation that the blades are clamped due to settlement of rock chips is avoided.

Drawings

FIG. 1 is a schematic representation of the construction of a shaped charge hole forming tool for geological exploration of the present utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of the structure of the central cartridge of the present utility model;

FIG. 4 is a B-B cross-sectional view of FIG. 3;

FIG. 5 is a cross-sectional view of C-C of FIG. 3;

FIG. 6 is a schematic view of the structure of the cutter body and cutting teeth of the present utility model;

FIG. 7 is a D-D sectional view of FIG. 6;

FIG. 8 is a schematic top view of the shaped charge hole forming tool for geological exploration of the present utility model;

FIG. 9 is a schematic view of the structure of the cutter body when the cutter body is opened in the practice of the present utility model;

in the figure: 1. lower half-button, 2, shell, 2a, shell stepped groove, 2b, shell internal spline, 3, center tube, 3a, center tube joint, 3b, center tube external spline, 3c, skewed tooth groove, 3d, runner hole, 4, spring retainer, 5, spring, 6, lower joint, 7, tool holder, 8, tool body, 8a, tool body gear, 9, cutting tooth, 10, connecting pin, 11.

Detailed Description

The utility model is further described below with reference to the drawings and the detailed description.

Referring to fig. 1 and 8, the shaped charge hole forming tool for geological exploration mainly comprises a half buckle, a shell, a central cylinder, a reaming cutter and a lower connector. The method is characterized in that: the half buckle comprises a lower half buckle 1 and an upper half buckle 11, and the upper half buckle and the lower half buckle are connected through screws; three step grooves 2a uniformly distributed in the circumferential direction are formed in the shell 2, and an internal spline 2b is formed in the shell 2; the central cylinder 3 is arranged in the shell 2 and is in spline connection with the shell 2, the lower end of the central cylinder 3 is in threaded connection with the spring baffle ring 4, and the spring 5 is arranged between the spring baffle ring 4 and the lower joint 6; the reaming cutter mainly comprises a cutter body 8, cutting teeth 9 and a cutter rest 7, wherein the cutter body 8 is connected with the cutter rest 7 through a connecting pin 10, the cutting teeth 9 are embedded and installed on the cutter body 8, and the cutter rest 7 is installed on the shell ladder groove 2a through bolts.

As shown in the accompanying drawings 3, 4 and 5, the upper end joint 3a of the central cylinder 3 is connected with a drill string, the upper part is cylindrical, the surface is provided with an external spline 3b, the middle section is regular hexagon, the surface is provided with inclined tooth grooves 3c at 3 intervals, the lower part is provided with 3 runner holes 3d for cylindrical surface processing, chips can be discharged in time when geological exploration reaming and drilling, and the situation that the blades are blocked due to the settlement of rock chips is avoided.

As shown in fig. 1, 6, 7 and 8, the reaming tool is uniformly distributed on the stepped groove 2a of the shell at 120 degrees in the circumferential direction, the cutter body 8 is provided with gears and cutting teeth 9, the inclination angle of the cutting teeth 9 is inclined outwards by 4-7 degrees, the inclination angle of the cutting teeth 9 is inclined back to the gear direction by 4-7 degrees, the circulation of cutting chips is facilitated, the cutting teeth number is 15-17, the distribution positions of the cutting teeth 9 on each cutter body 8 are different, the top of the cutter body 8 adopts a circular arc structure, the coverage surface of the cutting teeth is ensured, and the reaming speed is improved by adopting the same-track tooth distribution mode; the lower half buckle 1 and the upper half buckle 11 can be selected in length according to different exploration requirements, so that the stepped aperture is realized or the maximum reaming diameter of the tool is limited.

The utility model relates to a working principle of a shaped charge hole forming tool for geological exploration, which comprises the following steps:

referring to fig. 1, the tool is connected with the drill string and goes down to the exploration operation area together, the pressure and torque of the drilling machine are increased step by step when the pilot bit drills normally, the load acts on the drill string and the central cylinder 3, the central cylinder 3 moves downwards, the cutter body gear 8a rotates on the tooth slot 3c to enable the reaming cutter body to extend out and the torque acting on the central cylinder 3 to drive the tool to integrally rotate through the connection of the spline 2b and the spline 3b, the step reaming operation is carried out, the pressure and the torque of the drilling machine are reduced after the operation is completed, the spring 5 resets, and the cutter wings are retracted. Meanwhile, the sizes 1 and 11 of the half buckles can be changed to limit the hole diameter of the reaming so as to realize gradual reaming. And then the explosive is put in, and sound waves are radially transmitted in a horn shape (cone shape) when the filled explosive explodes, so that geological exploration of resources such as petroleum, natural gas and the like is completed.

The above-described embodiments are intended to illustrate the present patent and not to limit the scope of the present patent, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present patent are intended to be within the scope of the present patent system.

Claims (4)

1. The utility model provides a shaped charge hole instrument of taking shape for geological prospecting, mainly comprises half knot, shell, central section of thick bamboo, reaming cutter, lower clutch, characterized by: the half buckle comprises a lower half buckle (1) and an upper half buckle (11), and the upper half buckle and the lower half buckle are connected through a screw; three step grooves (2 a) uniformly distributed in the circumferential direction are formed in the shell (2), and an internal spline (2 b) is formed in the shell (2); the central cylinder (3) is arranged in the shell (2) and is in spline connection with the shell (2), the lower end of the central cylinder (3) is in threaded connection with the spring baffle ring (4), and the spring (5) is arranged between the spring baffle ring (4) and the lower joint (6); the reaming cutter mainly comprises a cutter body (8), cutting teeth (9) and a cutter rest (7), wherein the cutter body (8) is connected with the cutter rest (7) through a connecting pin (10), the cutting teeth (9) are embedded and installed on the cutter body (8), and the cutter rest (7) is installed on a shell stepped groove (2 a) through bolts.

2. A shaped charge hole forming tool for geological exploration according to claim 1, wherein: the center section of thick bamboo (3) upper end joint (3 a) link to each other with the drilling string, upper portion is cylindric and surface processing has external splines (3 b), the middle part cross-section is regular hexagon and has skewed tooth groove (3 c) at 3 interval surface processing, the lower part is cylindric surface processing has 3 runner holes (3 d), can be better let the piece in time discharge when geological exploration reaming is bored, avoid the subsidence of rock debris to lead to the blade to be blocked.

3. A shaped charge hole forming tool for geological exploration according to claim 1, wherein: the reaming tool is circumferentially and uniformly distributed on the outer shell stepped groove (2 a) at an angle of 120 degrees, gears and cutting teeth (9) are machined on the cutter body (8), the inclination angle of the cutting teeth (9) is inclined outwards by 4-7 degrees, the inclination angle of the cutter body is inclined back to the gear direction by 4-7 degrees, circulation of cutting scraps is facilitated, the cutting teeth number is 15-17, the distribution positions of the cutting teeth (9) on each cutter body (8) are different, the top of each cutter body (8) adopts a circular arc structure, the coverage surface of the cutting teeth is ensured, and the same-track tooth distribution mode is used, so that the reaming speed is improved.

4. A shaped charge hole forming tool for geological exploration according to claim 1, wherein: the lower half buckle (1) and the upper half buckle (11) can be used for selecting the lengths according to different exploration requirements, realizing the step aperture or limiting the maximum reaming diameter of the tool.