Well drilling stabilizer for large deviated well

Abstract

A well drilling stabilizer for a large-well deviated well belongs to the technical field of petroleum well drilling speed increasing tools and comprises a main body structure, an upper stabilizing block, upper blades, a lower stabilizing block and lower blades, the upper blades are evenly arranged on the upper stabilizing block, the lower blades are evenly arranged on the lower stabilizing block, and the upper stabilizing block and the lower stabilizing block are connected through the main body structure. And three upper blades are uniformly arranged on the upper stabilizing block. And three lower blades are uniformly arranged on the lower stabilizing block. The stabilizer can solve the problems that a stabilizer for a large-well-slope well cannot make contact with the well wall, and consequently deflection and vibration occur. And meanwhile, the borehole size can be kept, and the problem that the borehole size is not good due to necking down is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling speed-up tools, and in particular relates to a drilling stabilizer used for a well with a large well deviation. Background Art

[0002] The pipe system in oil and gas drilling inevitably generates vibrations, including lateral vibration, axial vibration and torsional vibration, which cause serious damage to the drill string system. In particular, the vortex and reverse rotation caused by the lateral vibration cause early damage to the drill bit and drill string. At this time, a stabilizer is needed to reduce the vibration damage of the drill string. During the drilling of high-angle directional wells, it is difficult for the drilling stabilizer to fully contact the well wall, resulting in drill string deflection and vibration, and poor stabilization effect. Summary of the invention

[0003] In order to solve the problem of low pipe string installation efficiency during pipe lifting and lowering operations, the present invention proposes: a drilling stabilizer for a well with a large well deviation, comprising a main structure, an upper stabilizing block, upper blades, a lower stabilizing block, and lower blades, the upper blades are evenly arranged on the upper stabilizing block, the lower blades are evenly arranged on the lower stabilizing block, and the upper stabilizing block and the lower stabilizing block are connected by the main structure.

[0004] Furthermore, three upper blades are evenly arranged on the upper stabilizing block.

[0005] Furthermore, three lower blades are evenly arranged on the lower stabilizing block.

[0006] Furthermore, the length of the upper stabilizing block is 490 mm.

[0007] Furthermore, the curvature of the upper blade of the upper stabilizing block is 0.0003 mm. -1 .

[0008] Furthermore, the length of the lower stabilizing block is 340 mm.

[0009] Furthermore, the curvature of the lower blade of the lower stabilizing block is 0.001 mm. -1 .

[0010] Furthermore, the lower stabilizing block is inlaid with cutting teeth.

[0011] The beneficial effects of the present invention are as follows: the present invention can solve the problem that the well stabilizer of a large well inclination rate cannot contact the well wall, thereby causing deflection and vibration. At the same time, the wellbore size can be maintained, solving the problem of poor wellbore size caused by necking. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a structural schematic diagram of a drilling stabilizer for use in large deviated wells.

[0013] Among them, the figure markings are: 1. main structure, 2. upper stabilizing block, 3. upper blade, 4. lower stabilizing block, 5. lower blade, 6. cutting tooth. DETAILED DESCRIPTION

[0014] A drilling stabilizer for high-angle wells, such as Figure 1 As shown, a drilling stabilizer for a highly deviated well, wherein an upper stabilizing block 2 and a lower stabilizing block 4 are respectively arranged at the upper and lower ends of a main structure 1. The two stabilizing blocks are spaced a certain distance apart. The upper and lower stabilizing blocks can generate multiple fulcrums in a highly deviated well, thereby increasing the contact area, improving stability and increasing drilling pressure, thereby improving drilling efficiency.

[0015] The upper stabilizing block 2 is relatively long and includes three upper blades 3, and the curvature of the blades is relatively small. This structure can form a larger contact area with the well wall, which is beneficial to improving the stability of the drill string. The smaller blade curvature is beneficial to the passage of fluid and maintains a larger flow circulation.

[0016] The lower stabilizing block 4 is relatively short and has three lower blades 5, on which cutting teeth 6 are arranged. A shorter stabilizing block is advantageous for passing through a high-angle wellbore and facilitating drilling guidance. The lower stabilizing block 4 first contacts the formation, and the cutting teeth 6 arranged on the lower blades 5 play a role in expanding the hole when necessary, which is advantageous for maintaining the wellbore diameter and reducing the friction with the wellbore wall. The blades 5 have a large curvature, which can improve the anti-torsion and anti-lateral vibration capabilities of the drill string, thereby reducing the probability of drill sticking.

[0017] A drilling stabilizer for a well with a large well deviation comprises a main structure 1, an upper stabilizing block 2, upper blades 3, a lower stabilizing block 4 and lower blades 5. The upper blades 3 are evenly arranged on the upper stabilizing block 2, the lower blades 5 are evenly arranged on the lower stabilizing block 4, and the upper stabilizing block 2 and the lower stabilizing block 4 are connected via the main structure 1.

[0018] Wherein, three upper blades 3 are evenly arranged on the upper stabilizing block 2 .

[0019] Wherein, three lower blades 5 are evenly arranged on the lower stabilizing block 4 .

[0020] Wherein, the length of the upper stabilizing block 2 is 490 mm.

[0021] The curvature of the upper blade 3 of the upper stabilizing block 2 is 0.0003 mm. -1 .

[0022] Wherein, the length of the lower stabilizing block 4 is 340 mm.

[0023] The curvature of the lower blade 5 of the lower stabilizing block 4 is 0.001 mm. -1 .

[0024] The lower stabilizing block 4 is inlaid with cutting teeth 6 .

[0025] A drilling stabilizer for high-angle wells, such as Figure 1 As shown, a drilling stabilizer for a highly deviated well, wherein an upper stabilizing block 2 and a lower stabilizing block 4 are respectively arranged at the upper and lower ends of a main structure 1. The two stabilizing blocks are spaced a certain distance apart. The upper and lower stabilizing blocks can generate multiple fulcrums in a highly deviated well, thereby increasing the contact area, improving stability and increasing drilling pressure, thereby improving drilling efficiency.

[0026] The upper stabilizing block 2 is relatively long and includes three upper blades 3, and the curvature of the blades is relatively small. This structure can form a larger contact area with the well wall, which is beneficial to improving the stability of the drill string. The smaller blade curvature is beneficial to the passage of fluid and maintains a larger flow circulation.

[0027] The lower stabilizing block 4 is relatively short and has three lower blades 5, on which cutting teeth 6 are arranged. A shorter stabilizing block is advantageous for passing through a high-angle wellbore and facilitating drilling guidance. The lower stabilizing block 4 first contacts the formation, and the cutting teeth 6 arranged on the lower blades 5 play a role in expanding the hole when necessary, which is advantageous for maintaining the wellbore diameter and reducing the friction with the wellbore wall. The blades 5 have a large curvature, which can improve the anti-torsion and anti-lateral vibration capabilities of the drill string, thereby reducing the probability of drill sticking.

[0028] A drilling stabilizer for a well with a large well deviation comprises a main structure 1, an upper stabilizing block 2, upper blades 3, a lower stabilizing block 4 and lower blades 5. The upper blades 3 are evenly arranged on the upper stabilizing block 2, the lower blades 5 are evenly arranged on the lower stabilizing block 4, and the upper stabilizing block 2 and the lower stabilizing block 4 are connected via the main structure 1.

[0029] Wherein, three upper blades 3 are evenly arranged on the upper stabilizing block 2 .

[0030] Wherein, three lower blades 5 are evenly arranged on the lower stabilizing block 4 .

[0031] Wherein, the length of the upper stabilizing block 2 is 490 mm.

[0032] The curvature of the upper blade 3 of the upper stabilizing block 2 is 0.0003 mm. -1 .

[0033] Wherein, the length of the lower stabilizing block 4 is 340 mm.

[0034] The curvature of the lower blade 5 of the lower stabilizing block 4 is 0.001 mm. -1 .

[0035] The lower stabilizing block 4 is inlaid with cutting teeth 6 .

[0036] A drilling stabilizer for high-angle wells, such as Figure 1As shown, a drilling stabilizer for a highly deviated well, wherein an upper stabilizing block 2 and a lower stabilizing block 4 are respectively arranged at the upper and lower ends of a main structure 1. The two stabilizing blocks are spaced a certain distance apart. The upper and lower stabilizing blocks can generate multiple fulcrums in a highly deviated well, thereby increasing the contact area, improving stability and increasing drilling pressure, thereby improving drilling efficiency.

[0037] The upper stabilizing block 2 is relatively long and includes three upper blades 3, and the curvature of the blades is relatively small. This structure can form a larger contact area with the well wall, which is beneficial to improving the stability of the drill string. The smaller blade curvature is beneficial to the passage of fluid and maintains a larger flow circulation.

[0038] The lower stabilizing block 4 is relatively short and has three lower blades 5, on which cutting teeth 6 are arranged. A shorter stabilizing block is advantageous for passing through a high-angle wellbore and facilitating drilling guidance. The lower stabilizing block 4 first contacts the formation, and the cutting teeth 6 arranged on the lower blades 5 play a role in expanding the hole when necessary, which is advantageous for maintaining the wellbore diameter and reducing the friction with the wellbore wall. The blades 5 have a large curvature, which can improve the anti-torsion and anti-lateral vibration capabilities of the drill string, thereby reducing the probability of drill sticking.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drilling stabilizer for a well with a large well deviation, characterized in that: The invention comprises a main structure (1), an upper stabilizing block (2), upper blades (3), a lower stabilizing block (4), and lower blades (5); the upper blades (3) are evenly arranged on the upper stabilizing block (2); the lower blades (5) are evenly arranged on the lower stabilizing block (4); and the upper stabilizing block (2) and the lower stabilizing block (4) are connected via the main structure (1).

2. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: Three upper blades (3) are evenly arranged on the upper stabilizing block (2).

3. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: Three lower blades (5) are evenly arranged on the lower stabilizing block (4).

4. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: The length of the upper stabilizing block (2) is 490 mm.

5. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: The curvature of the upper blade (3) of the upper stabilizing block (2) is 0.0003 mm. -1 .

6. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: The length of the lower stabilizing block (4) is 340 mm.

7. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: The curvature of the lower blade (5) of the lower stabilizing block (4) is 0.001 mm. -1 .

8. The drilling stabilizer for a high-angle well according to claim 1, characterized in that: The lower stabilizing block (4) is inlaid with cutting teeth (6).

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