CN205840769U - A kind of underground hydraulic rotary impact device - Google Patents

Abstract

The utility model relates to an underground hydraulic rotary impact device, which comprises an upper connector, an outer cylinder, a flow guiding device, a rotary impact generator and a lower connector; The flow device and the rotary impact generator; the flow guide device is composed of an inner conduit and a flow guide outer sleeve; the rotary impact generator is composed of an end cover, an impact stator, an impact rotor, a reversing valve core, a mandrel, a variable nozzle, a sealing ring, a positioning The supporting ring is composed of each component together forming the generator's impact chamber, reversing chamber, high-pressure flow path and low-pressure flow path. The device has simple structure, fewer moving parts and high reliability. When working, it can generate certain frequency, circumferential torsion, and impact mechanical rock-breaking energy, which can be directly transmitted to the drill bit, effectively reducing or eliminating the stickiness of the drill bit in deep hard formations. Sliding vibration, improve service life, achieve efficient rock breaking, and have no effect on the torque transmitted by the drill string.

Description

A Downhole Hydraulic Rotary Impact Device

technical field

The utility model relates to a downhole hydraulic rotary impact device, which belongs to the field of oil and gas drilling and production.

Background technique

With the development of oil and gas production to deeper and harder formations, the traditional rotary drilling technology is greatly restricted. When the drill bit breaks rocks in such formations, the torque provided by the drill string to the bit begins to be less than the shear limit of the rock on the working face. The drill bit stops rotating with the drill string, and the drill bit is in a sticky state at this time. Since the wellhead drilling rig continues to provide torque to the drill string, when the accumulated torque in the drill string is greater than the shear limit of the rock under the drill bit, the torsional elastic potential energy in the drill string is released instantly, causing the drill bit to move irregularly around the axial direction. in a slipping state. This stick-slip state occurs alternately periodically, which is called stick-slip vibration. This will greatly increase the wear of the drill bit, accelerate the failure of the drill bit, consume the driving energy of the wellhead, accelerate the fatigue failure of the lower drilling tool, reduce the quality of the well body, and further reduce the drilling efficiency.

In response to the above problems, in order to improve drilling efficiency and reduce or eliminate stick-slip vibration, some torsional impact devices at home and abroad have also emerged as the times require. However, compared with foreign countries, the domestic torsional impact device has a complex structure, limited life, and immature technology, while foreign technology is kept secret and the introduction cost is high.

Utility model content

The purpose of the utility model is to provide a downhole hydraulic rotary impact device, which is used to improve the drilling efficiency of the drill bit in the deep hard formation, and reduce or eliminate the stick-slip vibration.

The technical scheme of the utility model is: the device includes an upper connector, an outer cylinder, a flow guiding device, a rotary impact generator and a lower connector; the upper end of the outer cylinder is connected with the upper connector through threads, and the lower end of the outer cylinder is connected with the lower connector through The torque teeth are connected, and a flow guide device and a rotary impact generator are installed from top to bottom inside the outer cylinder and between the upper and lower connectors; the flow guide device is composed of an inner conduit and a flow guide outer sleeve, and the inner guide is inserted into the flow guide outer sleeve The upper part, the lower end of the diversion outer sleeve is connected to the upper end of the rotary impact generator; the rotary impact generator is composed of an end cover, an impact stator, an impact rotor, a reversing valve core, a mandrel, a variable nozzle, a sealing ring, and a positioning support ring, and the impact stator The lower end is connected with the lower connecting head through threads, and there are symmetrically arranged blind holes on the bottom end surface of the impact stator, corresponding to the threaded through hole in the inner end surface of the middle part of the lower connecting head, and the two are connected by hexagon socket set screws; the lower end of the lower connecting head is connected through NC thread drill.

The rotary impact generator is coaxially installed with a core shaft, a reversing valve core, an impact rotor, and an impact stator in sequence from the inside to the outside. A sealing ring and a positioning support ring are installed at the gap of the mandrel, and a variable nozzle is installed at the inner step surface of the lower part of the mandrel, thereby jointly forming an impact chamber, a reversing chamber, and a high-pressure flow path and a low-pressure flow path; The fan-shaped impact bodies symmetrically arranged on the outer surface of the rotor and the fan-shaped grooves arranged symmetrically on the inner surface of the impact stator are installed together, and a closed chamber is formed by the end cover on the upper part of the generator; The fork and the guide groove symmetrically arranged on the outer surface of the reversing valve core are installed together, and a closed chamber is formed by the sealing ring on the upper part of the generator; there are two high-pressure flow channels, and the main high-pressure flow channel is sequentially composed of the mandrel spiral groove, The spool high-pressure hole is composed of the auxiliary high-pressure flow channel, which is composed of the end cover semi-circular groove, the impact stator outer semi-circular groove, and the stator high-pressure hole; the low-pressure flow channel has two, and the main low-pressure flow channel is sequentially composed of the reversing valve core discharge groove. , the mandrel oblique discharge hole, the auxiliary low-pressure flow passage is composed of the inner semicircular groove and the mandrel oblique discharge hole in turn, the main and auxiliary low-pressure flow passages converge in the discharge chamber at the lower part of the mandrel, and connect with the through hole at the lower part of the impact stator Connected to form a low-pressure flow channel outlet; both sides of the impact rotor fan-shaped impact body and both sides of the shift fork have flow channel holes; the lower part of the mandrel has a shaft shoulder; the lower part of the impact stator has an inner step surface.

The beneficial effects of the utility model are: to generate a certain frequency, circumferential torsion, and impact mechanical rock-breaking energy, and directly transmit it to the drill bit, effectively reducing or eliminating the stick-slip vibration of the drill bit in deep hard formations, improving the service life, and realizing Efficient rock breaking without affecting the torque transmitted by the drill string. The device has simple structure, few moving parts, few leakage points, high reliability, strong adaptability to drill bits and formations, and is suitable for the current situation and working conditions of the drilling industry in my country. When the device fails, it will not have any impact on the drilling process.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is A-A sectional view in accompanying drawing 1;

Accompanying drawing 3 is the external view of the rotary impact generator in the utility model.

In the figure: 1. Upper connector, 2. Outer cylinder, 3. Inner conduit, 4. Outer tube for diversion, 5. End cap, 6. Mandrel, 7. Reversing valve core, 8. Impact rotor, 9. Impact stator, 10. Variable nozzle, 11. Lower connector, 12. Drill bit, 13. Hexagon socket set screw, 14. Discharge cavity, 15. Inclined discharge hole, 16. Spiral groove, 17. Seal ring, 18 .Positioning support ring, 19. Outer semicircle groove, 20. Stator high pressure hole, 21. Sector-shaped groove, 22. Sector-shaped impact body, 23. Discharge groove, 24. Inner semicircle groove, 25. Shift fork, 26. Guide groove, 27. Valve core high pressure hole, 28. Main channel hole, 29. Auxiliary channel hole, 30. End cover semicircle groove, 31. Torque tooth.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, the downhole hydraulic rotary impact device of the present utility model includes an upper connector 1, an outer cylinder 2, a flow guiding device, a rotary impact generator and a lower connector 11; the upper end of the outer cylinder 2 passes through the upper connector 1 The lower end of the outer cylinder 2 is connected with the lower connector 11 through the torque teeth 31, so that the torque of the drill string is directly transmitted to the drill bit downwards. Inside the outer cylinder 2, a flow guide device is installed from top to bottom between the upper and lower connectors and the rotary impact generator; the diversion device is composed of an inner conduit 3 and a diversion outer sleeve 4, the inner conduit 3 is inserted in the upper part of the diversion outer sleeve 4, the lower end of the diversion outer sleeve 4 is connected with the upper end of the rotary impact generator, and the drilling fluid After passing through the diversion device, it is divided into two streams, one stream enters the interior of the mandrel 6 of the rotary impact generator, enters the impact chamber through the main high-pressure flow channel, and the other stream flows above the end cover 5 of the rotary impact generator, and passes through the auxiliary high-pressure flow channel Enter the reversing cavity; the rotary impact generator is composed of an end cover 5, an impact stator 9, an impact rotor 8, a reversing valve core 7, a mandrel 6, a variable nozzle 10, a sealing ring 17, and a positioning support ring 18, and the lower end of the impact stator 9 It is connected with the lower connector 11 through threads, and the bottom end surface of the impact stator 9 has symmetrically arranged blind holes, which correspond to the threaded through holes on the inner end surface of the middle part of the lower connector 11. The two are connected by hexagon socket set screws 13 to transmit the impact torque , and prevent thread loosening caused by impact; the lower end of the lower connector 11 is connected to the drill bit 12 through NC threads.

As shown in Figure 2 and Figure 3, the rotary impact generator is coaxially installed with a core shaft 6, a reversing valve core 7, an impact rotor 8, and an impact stator 9 from the inside to the outside, and an end cover is installed on the upper part of the generator 5. A sealing ring 17 and a positioning support ring 18 are installed in the gap between the end cover 5, the reversing valve core 7 and the impact rotor 8, and a variable nozzle 10 is installed on the inner step surface of the lower part of the mandrel 6, thereby jointly forming the impact chamber, The reversing cavity, as well as the high-pressure flow channel and the low-pressure flow channel; the impact cavity is composed of a fan-shaped impact body 22 symmetrically arranged on the outer surface of the impact rotor 8 and a fan-shaped groove 21 symmetrically arranged on the inner surface of the impact stator 9. The end cover 5 forms a closed chamber, and the fan-shaped impact body 22 reciprocates along the fan-shaped groove 21 under the joint action of the reversing valve core 7, the main high-pressure flow channel and the main low-pressure flow channel, and impacts the inner wall of the fan-shaped groove 21 at the same time, and drives the impact The rotor 8 performs reciprocating rotation; the reversing chamber is composed of a shift fork 25 arranged symmetrically on the inner surface of the impact rotor 8 and a guide groove 26 arranged symmetrically on the outer surface of the reversing valve core 7, and is formed by a sealing ring 17 on the upper part of the generator. The chamber is closed, and the reversing valve core 7 is driven by the shift fork 25 to rotate simultaneously with the impact rotor 8. When a rotation stroke is over, the guide groove 26 is in the joint of the rotational inertia, the auxiliary high-pressure flow channel and the auxiliary low-pressure flow channel. Under the action, the relative shift fork 25 continues to move, resulting in the conversion of the liquid inlet and outlet in the impact chamber, thereby realizing the reverse rotation of the impact rotor 8, and driving the reverse rotation of the reversing valve core 7 to complete the reversing; the high-pressure flow channel has Two, the main high-pressure flow channel is composed of the core shaft 6 spiral groove 16, the valve core high-pressure hole 27, the auxiliary high-pressure flow channel is composed of the end cover semi-circular groove 30, the impact stator 9 outer semi-circular groove 19, and the stator high-pressure hole 20; There are two flow channels, the main low-pressure flow channel is composed of the reversing valve core 7 discharge groove 23, the mandrel 6 oblique discharge hole 15, and the auxiliary low-pressure flow channel is sequentially composed of the inner semicircular groove 24, the mandrel 6 oblique discharge hole 15, the main and auxiliary low-pressure flow channels converge in the discharge chamber 14 at the lower part of the mandrel 6, and communicate with the through hole at the lower part of the impact stator 9 to form the outlet of the low-pressure flow channel; the two sides of the fan-shaped impact body 22 of the impact rotor 8 and the shift fork There are flow channel holes 28 and 29 on both sides of 25, which are used as the liquid inlet or liquid outlet of the impact chamber and the reversing chamber. The main high-pressure flow channel and the main low-pressure flow channel are connected to the impact chamber through the main channel hole 28, and the auxiliary high-pressure flow channel The channel and the auxiliary low-pressure channel are connected to the reversing cavity through the auxiliary channel hole 29; the lower part of the mandrel 6 has a shoulder to support the reversing valve core 7;

When the downhole hydraulic rotary impact device of the utility model works, the drilling fluid enters the diversion device from the through hole 1 of the upper connection head, and after the flow is divided, one stream enters the main high-pressure flow channel, and the other stream enters the auxiliary high-pressure flow channel; drilling fluid in the main high-pressure flow channel The drilling fluid enters the impact chamber through the liquid inlet in the main channel hole 28, and pushes the fan-shaped impact body 22 to move. At the same time, the shift fork 25 drives the reversing valve core 7 to rotate. The liquid outlet enters the main low-pressure flow channel. When a stroke ends, the fan-shaped impact body 22 impacts the fan-shaped groove 21 to form an impact force on the impact stator 9; at this time, the drilling fluid in the auxiliary high-pressure flow channel passes through the auxiliary flow channel hole 29. The liquid inlet enters the reversing chamber, and the guide groove 26 continues to move under the action of the driving force of the high-pressure drilling fluid and the rotation inertia of the reversing valve core 7, resulting in the conversion of the liquid inlet and the liquid outlet in the impact chamber, realizing the fan-shaped impact body 22, and the reverse rotation of the reversing spool 7 completes the reversing, and the drilling fluid on the other side of the shift fork 25 enters the auxiliary low-pressure flow channel through the liquid outlet in the auxiliary flow channel hole 29, and then repeats the above-mentioned impact, switching Drilling fluid in the low-pressure flow channel flows out from the rotary impact generator and enters the flow channel system of the drill bit 12 through the hollow of the lower joint 11, and then sprays out from the nozzle of the drill bit 12; due to the symmetrical arrangement of the impact chamber and the reversing chamber, the impact rotor 8 A pair of impact forces on the impact stator 9 constitute an impact torque, which is transmitted to the lower connector 11 by the hexagon socket set screw 13, and then the lower connector 11 is transmitted to the drill bit 12. The torque provided by the ground is transmitted to the upper connector 1 through the drill string, and the upper connector 1 transmits the torque to the drill bit 12 through the outer cylinder 2 and the lower connector 11 . The drill bit 12 breaks the rock under the joint action of the ground torque and the impact torque to increase the drilling speed.

The above is only one embodiment of the utility model, and other structural forms based on the principle of the utility model are within the scope of the utility model.

Claims (2)

1. a underground hydraulic rotary impact device, it is characterised in that: include upper binding head (1), urceolus (2), guiding device, rotation Turn surge generator and lower union joint (11)；Urceolus (2) upper end is connected by screw thread with upper binding head (1), urceolus (2) lower end with Lower union joint (11) is connected by moment of torsion tooth (31), and urceolus (2) is internal, be vertically connected with between head and be provided with water conservancy diversion dress from top to bottom Put and rotary impact generator；Guiding device is made up of inner catheter (3) and water conservancy diversion trocar sheath (4), and inner catheter (3) is inserted into water conservancy diversion On trocar sheath (4), water conservancy diversion trocar sheath (4) lower end is connected with rotary impact generator upper end；Rotary impact generator is by end cap (5), impact stator (9), impact rotor (8), reversing valve core (7), mandrel (6), variable nozzle (10), sealing ring (17), location Support ring (18) forms, and impact stator (9) lower end is connected by screw thread with lower union joint (11), and impact stator (9) bottom face has Being arranged symmetrically with blind hole, corresponding with lower union joint (11) middle part inner face tapped through hole, both are by interior hexagonal holding screw (13) connect；The threaded drill bit of NC (12) is passed through in lower union joint (11) lower end.

Underground hydraulic rotary impact device the most according to claim 1, it is characterised in that: described rotary impact generator from In to outer be coaxially sequentially installed with mandrel (6), reversing valve core (7), impact rotor (8), impact stator (9), portion on the generator End cap (5) is installed, sealing ring (17) and location are installed in end cap (5) and reversing valve core (7), the gap of impact rotor (8) Support ring (18), is provided with variable nozzle (10) in mandrel (6) bottom at step surface, constitute impact chamber, commutation chamber, Yi Jigao Baric flow road and low pressure runner；Fan-shaped impact body (22) that described impact chamber is arranged symmetrically with by impact rotor (8) outer surface and impact The fan groove (21) that stator (9) inner surface is arranged symmetrically with coordinates installs composition, and forms envelope by the end cap (5) on generator top Close chamber；Shift fork (25) and reversing valve core (7) outer surface that described commutation chamber is arranged symmetrically with by impact rotor (8) inner surface are symmetrical The gathering sill (26) arranged coordinates installs composition, and the sealing ring (17) passing through generator top is formed and closes chamber；Described height Baric flow road has two, and main high pressure runner is made up of mandrel (6) helicla flute (16), spool pressure hole (27) successively, auxiliary high pressure runner It is made up of end cap half slot (30), impact stator (9) outer half slot (19), stator pressure hole (20) successively；Described low pressure runner Having two, primary low runner is made up of reversing valve core (7) dredging flow groove (23), mandrel (6) tiltedly discharge orifice (15) successively, auxiliary lowpressure stream Road is made up of interior half slot (24), mandrel (6) tiltedly discharge orifice (15) successively, and main and auxiliary low pressure runner is in earial drainage chamber, mandrel (6) bottom (14) converge in, and communicate with impact stator (9) lower through-hole, constitute low pressure runner exit；The fan-shaped punching of described impact rotor (8) Hit body (22) both sides and shift fork (25) both sides and all have runner hole (28), (29)；The shaft shoulder is arranged at described mandrel (6) bottom；Described impact Interior step surface is arranged at stator (9) bottom.