Positive pulse measurement-while-drilling equipment

Abstract

The utility model relates to the technical field of measurement while drilling, and discloses positive pulse measurement while drilling equipment, which comprises a positive pulse measurement while drilling instrument body, two sides of the positive pulse measurement while drilling instrument body are respectively connected with a mounting seat, a sliding sleeve is connected between the mounting seats in a sliding and sealing manner, and the sliding sleeve is connected with the positive pulse measurement while drilling instrument body. A spring is connected between the sliding sleeve and the mounting seat, a centralizing sleeve is connected to the sliding sleeve, and a plurality of cutting grooves are evenly distributed in the circumferential direction of the centralizing sleeve in an array connection mode. Compared with the prior art, the centralizer has the advantages that collision between the centralizer and the cylinder wall is relieved conveniently, the service life is prolonged, impacts and scouring of virtual mud cakes when encountering resistance are relieved conveniently, the centralizing efficiency is improved, and the measuring precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of while-drilling measurement, in particular to a positive pulse while-drilling measurement device. Background Art

[0002] The positive pulse measurement while drilling equipment uses the relative position of the needle valve and the small hole of the mud positive pulse generator to change the cross-sectional area of ​​the mud flow channel, thereby causing the mud pressure inside the drill string to increase. The movement of the needle valve is realized by the measurement data encoded by the probe tube through the drive control circuit; on the ground, the changes in the riser pressure are continuously detected and converted into different measurement data through decoding.

[0003] In the positive pulse measurement while drilling equipment, since the pulse short section is a suspended short section, the suspended short section usually needs to be straightened by a stabilizer during movement to ensure that it is centered in the external non-magnetic drill barrel, which is convenient for the needle valve and the flow limiting ring to cooperate. The external stabilizer of the existing positive pulse measurement while drilling equipment directly collides with the barrel wall during the straightening process, which is easy to wear and accelerate depreciation. In addition, when drilling horizontally, the groove of the straightening sleeve is usually set vertically, and the ribs on the side of the straightening sleeve close to the ground cause eccentric wear during the back and forth dragging process, which will affect the straightening accuracy after long-term use. When there are irregular mud cakes on the inner wall of the non-magnetic drill barrel, the resistance will be increased, reducing the straightening efficiency. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] The technical problem to be solved by the utility model is that the centralizer collides with the cylinder wall and is easy to wear. The vertical groove setting cannot alleviate the impact resistance between the inner wall and the centralizer, which reduces the centralizing efficiency, thereby affecting the control between the needle valve and the limiting ring and affecting the measurement accuracy.

[0006] 2. Technical Solution

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: a positive pulse while drilling measurement equipment, including a positive pulse while drilling measurement instrument body, the two sides of the positive pulse while drilling measurement instrument body are respectively connected with mounting seats, a sliding sleeve is provided for sliding sealing connection between the mounting seats, a spring is connected between the sliding sleeve and the mounting seat, a straightening sleeve is connected to the sliding sleeve, and the straightening sleeve is connected with a plurality of grooves arranged in a circumferentially uniform array.

[0008] Furthermore, a plurality of mounting holes are relatively connected on the main body of the positive pulse downhole measuring instrument and the mounting base, bolts are connected through the mounting holes, and locking nuts are connected to the other ends of the bolts. The arrangement of the mounting holes, bolts and locking nuts facilitates the installation of the mounting base.

[0009] Furthermore, slide grooves are respectively connected on both sides of the sliding sleeve, and a slider is relatively connected to the inner side of the mounting seat. The slider and the slide groove are slidably sealed to prevent mud from being introduced between the straightening sleeve and the mounting seat.

[0010] Furthermore, the groove is an arc-shaped structure, which facilitates the passage of mud. At the same time, the arc-shaped setting of the groove makes it possible for the well wall to exert a certain lateral force on the spiral stabilizer during the casing lowering process when the inner wall of the non-magnetic drill tube is irregular, thereby reducing the impact of encountering resistance.

[0011] Furthermore, the grooves are an even number, and a plurality of rollers are evenly distributed and rotatably connected between the grooves. The grooves extend from the upper surfaces of the rollers. The arrangement of the rollers can reduce the wear between the straightening sleeve and the non-magnetic drill barrel during the straightening process, reduce resistance, and extend its service life.

[0012] Furthermore, the portion of the straightening sleeve protruding from the groove is a rib, and the rib is a semicircular structure or an isosceles trapezoidal structure, so that the middle portion of the straightening sleeve is higher than the height of the two ends, thereby facilitating the straightening effect.

[0013] 3. Beneficial Effects

[0014] The advantages of the utility model compared with the prior art are:

[0015] The coordinated arrangement of the positive pulse while drilling measuring instrument body, mounting seat, sliding sleeve, spring, stabilizing sleeve and cutting groove enables the positive pulse while drilling measuring instrument to be kept in a centered position in the non-magnetic drill pipe to prevent eccentric wear. At the same time, the centering of the positive pulse while drilling measuring instrument body is ensured to accurately control the mud flow area between the pulse main valve head and the limiting ring, thereby facilitating accurate signal transmission and improving the accuracy of the measurement result. The arrangement of the spring facilitates buffering of the force exerted on the stabilizing sleeve to avoid damage to the stabilizing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a positive pulse while drilling measurement device.

[0017] Figure 2 The utility model is a main structural schematic diagram of a positive pulse drilling measurement device.

[0018] Figure 3 The utility model is a schematic diagram of the main cross-sectional structure of a positive pulse while-drilling measurement device.

[0019] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of A.

[0020] As shown in the figure: 1. Positive pulse drilling measuring instrument body, 2. Mounting seat, 3. Sliding sleeve, 4. Spring, 5. Straightening sleeve, 6. Slot, 7. Mounting hole, 8. Bolt, 9. Locking nut, 10. Sliding groove, 11. Sliding block, 12. Roller, 13. Rib. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] Combined with Figure 1 , Figure 2 and Figure 3 A positive pulse drilling measurement device comprises a positive pulse drilling measurement instrument body 1, and mounting seats 2 are respectively connected on both sides of the positive pulse drilling measurement instrument body 1. A plurality of mounting holes 7 are relatively connected on the positive pulse drilling measurement instrument body 1 and the mounting seat 2. Bolts 8 are connected through the mounting holes 7, and a locking nut 9 is connected at the other end of the bolt 8. A straightening sleeve 5 is arranged between the mounting seats 2. The straightening sleeve 5 is connected with a plurality of grooves 6 in a circumferentially uniform array. The portion of the straightening sleeve 5 protruding from the groove 6 is a rib 13, and the rib 13 is a semicircular structure or an isosceles trapezoidal structure. The groove 6 is an arc structure, and the number of the grooves 6 is an even number. A plurality of rollers 12 are evenly and rotatably connected between the grooves 6, and the grooves 6 are extended from the upper surface of the roller 12.

[0024] Through the coordinated arrangement of the positive pulse while drilling measuring instrument body 1, the mounting seat 2, the sliding sleeve 3, the spring 4, the straightening sleeve 5 and the cutting groove 6 in the above structure, the positive pulse while drilling measuring instrument can be kept in a centered position in the non-magnetic drill tube to prevent eccentric wear. At the same time, it also ensures that the positive pulse while drilling measuring instrument body 1 is centered so as to accurately control the mud flow area between the pulse main valve head and the limiting ring, thereby facilitating accurate signal transmission and improving the accuracy of the measurement result; the cutting groove 6 is an arc-shaped structure, which is convenient for mud to pass through. At the same time, the arc-shaped arrangement of the cutting groove 6 makes it easier for the inner wall of the non-magnetic drill tube to pass through. When the rule is in place, the inner wall generates a certain lateral component of force on the spiral stabilizer during the casing lowering process, thereby reducing the impact of encountering resistance, and facilitating the improvement of the straightening efficiency between the straightening sleeve 5 and the non-magnetic drill barrel. When the mud passes through the groove 6 of the straightening sleeve 5, a vortex is generated, which changes the smoothness and washes away the virtual mud cake. The setting of the roller 12 facilitates the reduction of the wear between the straightening sleeve 5 and the non-magnetic drill barrel during the straightening process, reduces the resistance, and extends its service life. The ribs 13 are semicircular structures or isosceles trapezoidal structures, so that the middle part of the straightening sleeve 5 is higher than the height of the two ends, thereby facilitating the straightening effect.

[0025] Embodiment 2

[0026] Based on the first embodiment, combined with the attached Figure 3 and Figure 4 A sliding sleeve 3 is provided in a sliding and sealing connection relative to the mounting seat 2, and sliding grooves 10 are respectively connected on both sides of the sliding sleeve 3. A slider 11 is relatively connected to the inner side of the mounting seat 2, and the slider 11 is slidingly and sealingly matched with the sliding groove 10. A spring 4 is connected between the sliding sleeve 3 and the mounting seat 2.

[0027] The arrangement of the spring 4 in the above structure makes it easy to buffer the force on the righting sleeve 5 to avoid damage to the righting sleeve 5, while the sliding block 11 and the slide groove 10 are slidably sealed to prevent mud from being introduced between the righting sleeve 5 and the mounting seat 2.

[0028] The specific installation method is as follows:

[0029] First, the top mounting seat 2 is installed conveniently through the setting of the mounting hole 7, bolt 8 and locking nut 9, and then the spring 4 is placed in the mounting seat 2, and then the sliding sleeve 3 is aligned with the mounting seat 2 for installation, and the slider 11 and the slide groove 10 are slidably sealed to prevent mud from being introduced between the straightening sleeve 5 and the mounting seat 2, and then the spring 4 and the bottom mounting seat 2 are installed in turn to complete the installation.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0032] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A positive pulse measurement while drilling device, comprising a positive pulse measurement while drilling instrument body (1), characterized in that: Mounting seats (2) are respectively connected to both sides of the positive pulse drilling measurement instrument body (1); a sliding sleeve (3) is provided in a sliding and sealing connection relative to the mounting seats (2); a spring (4) is provided between the sliding sleeve (3) and the mounting seat (2); a stabilizing sleeve (5) is connected to the sliding sleeve (3); and a plurality of grooves (6) are connected to the stabilizing sleeve (5) in a circumferentially uniform array.

2. The positive pulse measurement while drilling device according to claim 1, characterized in that: A plurality of mounting holes (7) are relatively connected on the positive pulse drilling measurement instrument body (1) and the mounting seat (2), a bolt (8) is passed through and connected in the mounting hole (7), and a locking nut (9) is connected to the other end of the bolt (8).

3. The positive pulse measurement while drilling device according to claim 1, characterized in that: The two sides of the sliding sleeve (3) are respectively connected with sliding grooves (10), and the inner side of the mounting seat (2) is relatively connected with a sliding block (11), and the sliding block (11) is slidingly and sealingly matched with the sliding groove (10).

4. The positive pulse measurement while drilling device according to claim 1, characterized in that: The cutting groove (6) is an arc-shaped structure.

5. The positive pulse measurement while drilling device according to claim 1, characterized in that: The number of the cutting grooves (6) is even, and a plurality of rollers (12) are evenly distributed and rotatably connected between the cutting grooves (6), and the cutting grooves (6) are extended from the upper surfaces of the rollers (12).

6. The positive pulse measurement while drilling device according to claim 1, characterized in that: The portion of the straightening sleeve (5) protruding from the groove (6) is a rib (13), and the rib (13) is a semicircular structure or an isosceles trapezoidal structure.

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