Novel weak magnetic detection guiding instrument

Abstract

The utility model discloses a novel weak magnetic detection guiding instrument, which comprises an upper sleeve and a lower sleeve, an inner sleeve is rotatably connected in the lower sleeve, a weak magnetic detection head is clamped in the inner sleeve, the top of the upper sleeve is connected with a data lead joint, a contact group I is arranged in the lower sleeve and matched with the inner sleeve, and a contact group II is arranged in the lower sleeve and matched with the data lead joint. A contact group II is arranged between the inner top of the inner sleeve and the weak magnetic detection head; a driving set is connected into the upper sleeve, the power output end of the driving set is connected with the inner sleeve to drive the inner sleeve to rotate, a lower isolation plate is connected to the position, close to the inner sleeve, in the upper sleeve, and a damping prompt module is arranged between the lower isolation plate and the top of the inner sleeve. Compared with the prior art, the novel weak magnetic detection guiding instrument provided by the utility model has the advantages that the novel weak magnetic detection guiding instrument is convenient to automatically adjust and ensures that multiple groups of data are accurately detected.

Description

Technical Field

[0001] The utility model relates to the technical field of weak magnetic detection, in particular to a novel weak magnetic detection guide instrument. Background Art

[0002] During the oil field drilling and well repair process, the pipe string or fish head may be lost and cannot be found. In the above construction process, the pipe string or fish head has just been lost and is completely lost. Generally, the lost pipe string or fish head, so the offset distance is generally not too far, within 2 meters.

[0003] During the positioning and detection process, a weak magnetic detection guide is generally used for positioning. However, due to the influence of nearby ferromagnetic materials containing magnetic interference, the positioning method is mostly to use an adjusted weak magnetic detection head to perform multi-directional detection and positioning, and then compare the obtained data with the conventional magnetic field data under no interference to obtain the accurate direction of the magnetic interference source. However, in the existing technology, the displacement of weak magnetic detection is mostly used manually, which may lead to inaccurate data. Utility Model Content

[0004] (1) Problems to be solved

[0005] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a new weak magnetic detection guide instrument which is convenient for automatic adjustment and ensures accurate detection of multiple sets of data.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a new type of weak magnetic detection guide instrument, including an upper sleeve and a lower sleeve, an inner sleeve is rotatably connected to the lower sleeve, a weak magnetic detection head is clamped in the inner sleeve, and a data wire connector is connected to the top of the upper sleeve, a contact group 1 is provided in the lower sleeve to cooperate with the inner sleeve, and a contact group 2 is provided between the top of the inner sleeve and the weak magnetic detection head;

[0008] A drive group is connected inside the upper sleeve, and a power output end of the drive group is connected to the inner sleeve to drive it to rotate. A lower isolation plate is provided in the upper sleeve near the inner sleeve, and a damping prompt module is provided between the lower isolation plate and the top of the inner sleeve.

[0009] As an improvement, the driving group is a reduction motor, which is fixedly connected to the upper sleeve. The top end of the inner sleeve passes through the lower isolation plate and is connected to a shaft sleeve, and the rotating end of the reduction motor is connected to the shaft sleeve.

[0010] As an improvement, the driving group is a reduction motor, which is fixedly connected to the upper sleeve. The top end of the inner sleeve passes through the lower isolation plate and is connected to a shaft sleeve, and the rotating end of the reduction motor is connected to the shaft sleeve.

[0011] As an improvement, the damping prompt module includes a plurality of damping grooves recessed in the top wall of the inner sleeve along the circumferential direction and a plurality of spring columns connected to the bottom wall of the lower isolation plate. The bottom end of the spring column is connected to a ball head, and the damping groove is an arc-shaped setting that matches the ball head.

[0012] As an improvement, the damping groove and the ball head are both made of metal.

[0013] As an improvement, a conductive groove is recessed in the outer wall of the inner sleeve, and the first contact group is electrically connected to the conductive groove.

[0014] As an improvement, the lower end of the inner sleeve is provided with a reduced diameter section, and connecting columns are connected to both sides of the inner sleeve near the reduced diameter section. An arc ring is slidably sleeved on the connecting column, and a spring is also sleeved on the connecting column;

[0015] The top wall of the arc ring is arranged in a plane, the bottom wall of the arc ring is provided with an arc surface, and the bottom end of the arc ring is also connected with a finger pick.

[0016] (3) Beneficial effects

[0017] The advantages of the present invention over the prior art are as follows: in the present application, the structural design is carried out for the detection head of the weak magnetic detection guide instrument, and the multi-angle rotation adjustment is carried out by the added reduction motor and the matched damping prompt module, and the reminder after the equidistant rotation is carried out at the same time, which facilitates data detection and ensures data accuracy, thereby being used to determine the exact direction of the magnetic interference source;

[0018] In this application, an arc ring structure is additionally provided to fix the weak magnetic detection head, and detection heads of different powers can be replaced for testing as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a new type of weak magnetic detection guide.

[0020] Figure 2 It is a structural schematic diagram of a cross-section of a new type of weak magnetic detection guide.

[0021] Figure 3 It is a structural schematic diagram of the cross-section of the inner sleeve.

[0022] Figure 4 It is a structural schematic diagram of the upper sleeve from above.

[0023] As shown in the figure: 1. Upper sleeve; 2. Lower sleeve; 3. Inner sleeve; 4. Weak magnetic detection head; 5. Data wire connector; 6. Lower isolation plate; 7. Reducer motor; 8. Bushing; 9. Damping groove; 10. Spring column; 11. Ball head; 12. Conductive groove; 13. Contact group 1; 14. Contact group 2; 15. Reduced diameter section; 16. Connecting column; 17. Arc ring; 18. Spring; 19. Finger pick. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings, wherein the same components are represented by the same reference numerals.

[0025] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0026] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art in the technical field to which the present invention pertains. The terminology used herein in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] In order to make the contents of the present invention more clearly understood, 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.

[0029] Please refer to the attached Figure 1-4 A new type of weak magnetic detection guide instrument includes an upper sleeve 1 and a lower sleeve 2. The lower sleeve 2 is also rotatably connected to an inner sleeve 3, and a weak magnetic detection head 4 is clamped in the inner sleeve 3. The top of the upper sleeve 1 is also connected to a data wire connector 5. A contact group 1 13 is provided in the lower sleeve 2 to cooperate with the inner sleeve 3. A contact group 2 14 is provided between the top of the inner sleeve 3 and the weak magnetic detection head 4. A conductive groove 12 is recessed in the outer wall of the inner sleeve 3. The contact group 1 13 is electrically connected to the conductive groove 12, and the electrical connection of each component equipment is realized through the contact group 1 13 and the contact group 2 14.

[0030] A driving group is connected inside the upper sleeve 1, and the power output end of the driving group is connected to the inner sleeve 3 to drive it to rotate, wherein the driving group is a reduction motor 7, and the reduction motor 7 is fixedly connected to the upper sleeve 1. The top end of the inner sleeve 3 passes through the lower isolation plate 6 and is connected to a shaft sleeve 8, and the rotating end of the reduction motor 7 is connected to the shaft sleeve 8.

[0031] In addition, a lower isolation plate 6 is provided in the upper sleeve 1 and is connected to the inner sleeve 3. A damping prompt module is provided between the lower isolation plate 6 and the top of the inner sleeve 3.

[0032] The damping prompt module includes a plurality of damping grooves 9 recessed in the top wall of the inner sleeve 3 along the circumferential direction and a plurality of spring columns 10 connected to the bottom wall of the lower isolation plate 6. The bottom end of the spring column 10 is connected with a ball head 11. The damping groove 9 is arranged in an arc shape to match the ball head 11. In order to increase the angle rotation prompt, the damping groove 9 and the ball head 11 are both made of metal.

[0033] During the specific implementation of the present invention, there may be a need to replace different power probes. A reduced diameter section 15 is provided at the lower end of the inner sleeve 3. Connecting columns 16 are connected on both sides of the inner sleeve 3 near the reduced diameter section 15. An arc ring 17 is slidably sleeved on the connecting column 16. A spring 18 is also sleeved on the connecting column 16. A receiving groove that can accommodate the connecting column 16 is provided in the arc ring. In order to facilitate the limiting of the arc ring 17, a pile head is provided in the receiving groove of the connecting column 16 for limiting the extreme movement position of the arc ring 17.

[0034] The top wall of the arc ring 17 is flat, the bottom wall of the arc ring 17 is provided with an arc surface, and the bottom end of the arc ring 17 is also connected with a finger pick 19. The finger pick can be used to move the arc ring 17 to contract and take out the weak magnetic detection head 4 for use. Different probes can be easily inserted through the setting of the arc surface. The spring 18 contracts when the arc ring 17 slides toward the inner wall of the inner sleeve. After the weak magnetic detection head is positioned, it is reset by the spring support.

[0035] In one embodiment, a three-axis fluxgate sensor is used to measure the fluxgates in three mutually perpendicular directions under this environment. The three-axis fluxgate sensor is driven to rotate by a reduction motor, and the sensor rotates around its own axis. A measurement is performed each time the distance of a damping slot is rotated. Multiple groups of damping slots can be set up for use, such as at intervals of 4°, 6°, etc. After one rotation, the data obtained is analyzed and calculated because the wellbore inclination and azimuth are known at this time. The corresponding points of each data are connected and combined. When the data is accurate, an irregular ellipse is obtained. It is compared with the perfect circle measured in an environment where there is only the earth's constant magnetic field, and it is found that the irregular ellipse is not A regular ellipse has a major semi-axis and a minor semi-axis in the direction of its major axis. Since the posture of the instrument with the fluxgate sensor is known during measurement, the direction of the semi-major axis of the irregular ellipse can be determined. This direction is the exact direction of the nearby magnetic interference source. At the same time, the stronger the magnetic interference, the closer the distance. Therefore, the magnetic interference intensity (i.e., the vector sum of the fluxgate vectors in three perpendicular directions and the data measured when all magnetic interference is reduced) is inversely proportional to the distance. This principle can be used to calculate the distance of ferromagnetic materials. The above specific usage is common knowledge among those skilled in the art, and the specific data calculation method will not be described in detail.

[0036] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0038] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A novel weak magnetic detection guide instrument, comprising an upper sleeve (1) and a lower sleeve (2), characterized in that: The lower sleeve (2) is also rotatably connected to an inner sleeve (3), a weak magnetic detection head (4) is clamped in the inner sleeve (3), and a data wire connector (5) is also connected to the top of the upper sleeve (1). The lower sleeve (2) is equipped with a contact group 1 (13) in conjunction with the inner sleeve (3), and a contact group 2 (14) is provided between the top of the inner sleeve (3) and the weak magnetic detection head (4); A driving group is connected inside the upper sleeve (1), and a power output end of the driving group is connected to the inner sleeve (3) to drive the inner sleeve (3) to rotate. A lower isolation plate (6) is connected to the inner sleeve (3) in the upper sleeve (1), and a damping prompt module is provided between the lower isolation plate (6) and the top of the inner sleeve (3).

2. A novel weak magnetic detection and guidance instrument according to claim 1, characterized in that: The driving group is a reduction motor (7), which is fixedly connected to the upper sleeve (1). The top end of the inner sleeve (3) passes through the lower isolation plate (6) and is connected to a shaft sleeve (8). The rotating end of the reduction motor (7) is connected to the shaft sleeve (8).

3. A novel weak magnetic detection and guidance instrument according to claim 2, characterized in that: The damping prompt module comprises a plurality of damping grooves (9) recessed in the top wall of the inner sleeve (3) along the circumferential direction and a plurality of spring columns (10) connected to the bottom wall of the lower isolation plate (6); a ball head (11) is connected to the bottom end of the spring column (10), and the damping groove (9) is arranged in an arc shape to match the ball head (11).

4. A novel weak magnetic detection and guidance instrument according to claim 3, characterized in that: The damping groove (9) and the ball head (11) are both made of metal.

5. The novel weak magnetic detection and guidance instrument according to claim 1, characterized in that: A conductive slot (12) is recessed in the outer wall of the inner sleeve (3), and the first contact group (13) is electrically connected to the conductive slot (12).

6. A novel weak magnetic detection and guidance instrument according to claim 1, characterized in that: The lower end of the inner sleeve (3) is provided with a reduced diameter section (15), and connecting columns (16) are connected to both sides of the inner sleeve (3) near the reduced diameter section (15), an arc ring (17) is slidably sleeved on the connecting column (16), and a spring (18) is also sleeved on the connecting column (16); The top wall of the arc ring (17) is arranged in a plane, the bottom wall of the arc ring (17) is provided with an arc surface, and the bottom end of the arc ring (17) is also connected with a finger pick (19).

Images