Slurry thruster

Abstract

The utility model discloses a slurry thruster, and mainly relates to the field of petroleum drilling. Comprising an upper connector, an upper shell, a double-male connector, a spline shell, an inner spline shell and a lower shell which are sequentially arranged and connected in a threaded mode, an auxiliary main shaft is arranged in the upper shell in a sliding mode, a main shaft is arranged in the spline shell, the main shaft can slide in the spline shell, the inner spline shell and the lower shell, and the auxiliary main shaft is connected with the main shaft. The auxiliary spindle and the outer side of the top end of the spindle are both in threaded connection with pistons, the bottom end of the spindle penetrates through the lower shell to be in threaded connection with a lower connector, and the auxiliary spindle can push the spindle after sliding. The beneficial effects of the utility model reside in that the auxiliary main shaft is pushed by slurry filled during well drilling, so that the main shaft is pushed by the auxiliary main shaft, the thrust of the slurry is transmitted to the drill bit, the bit pressure can be effectively applied to the drill bit, the effect of increasing the drilling speed is realized, and the drilling efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling, specifically a mud thruster. Background Technology

[0002] With the development of oil drilling technology in my country, drilling depths are getting deeper and deeper, and drilling trajectories are becoming more and more complex. Horizontal wells and highly deviated wells are common drilling trajectories at present. This often makes it difficult to apply drilling pressure to the drill bit using existing downhole tools.

[0003] Therefore, it is essential to invent a downhole tool that can be used in horizontal and highly deviated well sections to effectively apply drilling pressure to the drill bit through tool propulsion, thereby increasing drilling speed. Utility Model Content

[0004] The purpose of this utility model is to provide a mud thruster that uses mud injected during drilling to drive the secondary spindle, which in turn drives the main spindle, thereby transmitting the thrust of the mud to the drill bit. This effectively applies drilling pressure to the drill bit, thereby increasing drilling speed and improving drilling efficiency.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A mud thruster includes an upper connector, an upper housing, a double male connector, a spline housing, an inner spline housing, and a lower housing arranged sequentially and threadedly connected to each other. A secondary main shaft is slidably disposed within the upper housing, and a main shaft is disposed within the spline housing. The main shaft can slide within the spline housing, the inner spline housing, and the lower housing. A piston is threadedly connected to the outer side of the top end of the secondary main shaft and the main shaft. The bottom end of the main shaft passes through the lower housing and is threadedly connected to a lower connector. The secondary main shaft can push the main shaft after sliding.

[0007] Furthermore, the piston includes mud guards and sealing rings at both ends, and a guide belt and two combined sealing rings are provided in the middle of the piston.

[0008] Furthermore, the secondary spindle includes two nuts and two sealing structures.

[0009] Furthermore, the secondary spindle is connected to the double male connector via a sealing structure.

[0010] Furthermore, the outer wall of the upper housing near the double male connector is provided with multiple through holes, allowing the interior of the upper housing to communicate with the outside through these multiple through holes.

[0011] Furthermore, the outer side of the main shaft is provided with an external spline structure that is compatible with the internal spline housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This patent features a piston threadedly connected to the top of the secondary spindle, which can slide within the upper housing and has a double male connector that passes through its bottom end. A piston is also threadedly connected to the top of the main spindle, which can move within the splined housing, inner splined housing, and lower housing. The distances traveled by both the main and secondary spindles are related to the thruster's stroke. During drilling, external drilling mud flows in through the inner hole at the end of the upper connector. The bottom of the upper housing has a hole communicating with the outside, creating a pressure difference that pushes the piston and secondary spindle downwards. The secondary spindle then pushes the piston and main spindle downwards, causing the main spindle to move and push the lower connector outwards, thereby driving the drill bit to drill. This transfers the thrust of the drilling mud to the drill bit, effectively applying drilling pressure to the drill bit, thus increasing drilling speed and efficiency. Attached Figure Description

[0014] Appendix Figure 1 This is a structural cross-sectional view of the present invention.

[0015] Appendix Figure 2 This is a cross-sectional view of the sub-spindle and piston structure of this utility model.

[0016] The labels shown in the attached diagram:

[0017] 1. Upper connector; 2. Upper housing; 3. Double male connector; 4. Spline housing; 5. Inner spline housing; 6. Lower housing; 7. Sub-spindle; 71. Nut; 72. Sealing structure; 8. Spindle; 9. Piston; 91. Mud guard ring; 92. Sealing ring; 93. Guide belt; 94. Combined sealing ring; 10. Lower connector; 11. Through hole. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0019] This utility model describes a mud thruster. The main structure includes an upper connector 1, an upper housing 2, a double male connector 3, a splined housing 4, an inner splined housing 5, and a lower housing 6, all sequentially arranged and threadedly connected. After connection, the internal cavities of these components are interconnected. A secondary spindle 7 is slidably mounted inside the upper housing 2, and a main spindle 8 is mounted inside the splined housing 4. The main spindle 8 can slide within the splined housing 4, the inner splined housing 5, and the lower housing 6. Both the main spindle 8 and the secondary spindle 7 have stepped surfaces. The bottom of the upper housing 2 has an inner stepped surface that abuts against the stepped surface of the secondary spindle 7, and the bottom of the lower housing 6 has an inner stepped surface that abuts against the stepped surface of the main spindle 8. This design limits the lowest sliding position of the secondary spindle 7 and the main spindle 8, allowing the upper end of the secondary spindle 7 to move to the upper connector 1. The lower end can move to the position where the stepped surface of the secondary spindle 7 abuts against the stepped surface inside the upper housing 2, allowing the upper end of the main spindle 8 to move to the position at the bottom of the secondary spindle 7, and the lower end to move to the position where the stepped surface of the main spindle 8 abuts against the stepped surface inside the lower housing 6. This prevents the secondary spindle 7 and the main spindle 8 from sliding out of the corresponding cavities and falling off, thereby ensuring that the secondary spindle 7 and the main spindle 8 can slide back and forth to achieve normal transmission of thrust. The outer sides of the top ends of the secondary spindle 7 and the main spindle 8 are threaded with pistons 9. The bottom end of the main spindle 8 passes through the lower housing 6 and is threaded with a lower connector 10. After the secondary spindle 7 slides, it can push the main spindle 8, causing the main spindle 8 to move and drive the lower connector 10 outward, thereby driving the drill bit to drill in. This can transmit the thrust of the mud to the drill bit, thereby effectively applying drilling pressure to the drill bit.

[0020] Preferably, the piston 9 includes mud-proof rings 91 and sealing rings 92 at both ends. The piston 9 also has a guide belt 93 and two combined sealing rings 94 in the middle, which can block the mud entering from the upper connector 1, so that the mud only plays the role of pushing the secondary main shaft 7, preventing the mud from entering the upper housing 2, ensuring that a pressure difference can be formed in the upper housing 2, and ensuring the transmission of thrust.

[0021] Preferably, the secondary spindle 7 includes two nuts 71 and two sealing structures 72, and the secondary spindle 7 is connected to the double male connector 3 through the sealing structures 72.

[0022] Preferably, the outer wall of the upper housing 2 near the double male connector 3 is provided with a plurality of through holes 11, so that the interior of the upper housing 2 is connected to the outside through the plurality of through holes 11, thereby forming a pressure difference to ensure the reciprocating movement of the secondary spindle 7 within the upper housing 2.

[0023] Preferably, the outer side of the spindle 8 is provided with an external spline structure that is adapted to the inner spline housing 5. The external spline structure of the spindle 8 is connected to the spline groove of the inner spline housing 5. The torque on the inner spline housing 5 is transmitted to the spindle 8, and then the spindle 8 transmits it to the lower connector 10.

[0024] During operation, the drilling mud flows in through the inner hole of the upper connector 1. The lower end of the upper housing 2 has a through hole 11 that communicates with the outside air, creating a pressure difference. The drilling mud pushes the piston 9 and the auxiliary spindle 7 downwards. After the auxiliary spindle 7 moves, its bottom end contacts the top end of the main spindle 8, which then pushes the piston 9 and the main spindle 8 downwards, causing the main spindle 8 to move and push the lower connector 10 outwards, driving the drill bit to drill and increasing the drilling speed. When the main spindle 8 moves to the point where its stepped surface abuts against the inner stepped surface of the lower housing 6, the movement stops. Throughout the entire process, the upper connector 1, upper housing 2, double male connector 3, spline housing 4, inner spline housing 5, and lower housing 6 do not move.

[0025] This patent enables the drilling mud thrust to be transferred to the drill bit, thereby effectively applying drilling pressure to the drill bit, achieving the effect of increasing drilling speed and effectively improving drilling efficiency.

Claims

1. A mud thruster characterized by: The utility model provides a kind of piston pump, including upper joint (1), upper shell (2), double male joint (3), spline shell (4), inner spline shell (5), lower shell (6) sequentially arranged and between threaded connection, the vice main shaft (7) is slidably arranged in the upper shell (2), the main shaft (8) is arranged in the spline shell (4), the main shaft (8) can slide in spline shell (4), inner spline shell (5), lower shell (6), the outer side of the top end of vice main shaft (7), main shaft (8) is all threaded connection with piston (9), the bottom end of main shaft (8) is threaded connection with lower joint (10) and passes through lower shell (6), vice main shaft (7) can push main shaft (8) after sliding.

2. The mud thruster of claim 1, wherein: The piston (9) includes mud baffle ring (91) and sealing ring (92) arranged at both ends, and a guide belt (93) and two combined sealing rings (94) are further arranged in the middle of the piston (9).

3. The mud thruster of claim 1 wherein: The vice main shaft (7) includes two nuts (71) and two sealing structures (72).

4. The mud thruster of claim 3 wherein: The vice main shaft (7) is connected with the double male joint (3) through the sealing structure (72).

5. The mud thruster of claim 1 wherein: The outer wall of the upper shell (2) near one end of the double male joint (3) is provided with a plurality of through holes (11), so that the inside of the upper shell (2) is communicated with the outside through the plurality of through holes (11).

6. The mud thruster of claim 1 wherein: The outer side of the main shaft (8) is provided with an outer spline structure adapted to the inner spline shell (5).

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