CN115726694A - Jet-type hydraulic shock resistance reducing device - Google Patents

Abstract

The invention provides a jet-type hydraulic shock resistance reducing device which comprises an outer cylinder and an inner cylinder which are sleeved together. And a jet flow element is arranged in the outer cylinder body, and a moving part is connected to the jet flow element. And a valve mechanism is connected on the movable member, the valve mechanism can periodically change the pressure of fluid flowing through the valve mechanism under the driving of the movable member, and the pressure can overcome the elastic force of the first elastic member, so that the inner cylinder body periodically moves relative to the outer cylinder body along the axial direction. The jet-type hydraulic oscillation damping device has small volume, can effectively reduce the frictional resistance on a drill string in the drilling process, and simultaneously reduces the hydraulic pressure consumption in the damping process.

Description

Jet-type hydraulic shock resistance reducing device

Technical Field

The invention relates to the field of oilfield exploitation, in particular to a jet flow type hydraulic shock resistance reducing device.

Background

In the process of oil well drilling, how to improve the drilling efficiency of a drill string is one of the problems to be solved urgently in the drilling process.

The conventional thinking and method for improving the drilling efficiency of a drill string mainly have the following aspects: the first is to reduce the bit-feeding frictional resistance by improving the pressure and the rock-carrying efficiency of the drilling fluid through the adjustment of the performance of the drilling fluid. Secondly, the stability of the well wall and the track of the well are enhanced through well cementation measures. And thirdly, the drilling efficiency is improved by optimizing the drilling tool assembly. And fourthly, various drag reduction tools are used for reducing the friction resistance of the drill string.

The existing frequently-used resistance reducing tools mainly comprise roller type resistance reducing tools, non-rotating resistance reducing joints and other devices, and the devices have the problems of limited application conditions, unobvious resistance reducing effect and the like. The underground vibration drag reduction tool and the novel hydraulic vibration drag reduction tool can effectively solve the problems, thereby being recognized on site and being widely popularized and applied on site. However, the conventional hydraulic oscillator has large generated pressure consumption and large volume, so that the conventional hydraulic oscillator cannot be adapted to an ultra-deep directional well.

Disclosure of Invention

Aiming at the technical problems, the invention aims to provide a jet flow type hydraulic shock resistance reducing device. The jet-type hydraulic shock resistance reducing device has smaller volume, can effectively reduce the frictional resistance on a drill stem in the drilling process, and simultaneously reduces the hydraulic pressure loss in the resistance reducing process.

According to the invention, the jet flow type hydraulic shock resistance reducing device comprises an outer cylinder and an inner cylinder inserted into the outer cylinder, wherein a first channel for fluid circulation is defined in the inner cylinder, a second channel communicated with the first channel is defined in the outer cylinder, and the inner cylinder can move along the axial direction of the outer cylinder; the first elastic piece is used for fixing the relative positions of the outer cylinder body and the inner cylinder body; and the jet flow element is arranged in the second channel, a moving part is connected to the jet flow element, and the jet flow element can generate jet flow which changes alternately to drive the moving part to move periodically.

The movable piece is connected with a valve mechanism, the valve mechanism can periodically change the pressure of fluid flowing through the valve mechanism under the driving of the movable piece, and the pressure can overcome the elastic force of the first elastic piece, so that the inner cylinder body periodically moves relative to the outer cylinder body along the axial direction.

In a preferred embodiment, a first cavity is connected to the fluidic element, the movable member is disposed in the first cavity and divides the first cavity into an upper chamber and a lower chamber, and the alternately changed jet flow generated by the fluidic element can periodically enter the upper chamber and the lower chamber to push the movable member to swing in the first cavity.

In a preferred embodiment, the valve mechanism includes a first disk valve disposed in the first passage and connected to the movable member, and a second disk valve disposed on a side of the first disk valve away from the fluidic device, and a plurality of first through holes and a plurality of second through holes are respectively disposed on the first disk valve and the second disk valve, and the second through holes and the first through holes are respectively communicated correspondingly, so that the first through holes and the second through holes form a third passage communicated with the first passage. The second disc valve is fixed in the second channel, and the first disc valve can be driven by the movable piece to swing in the first channel.

In a preferred embodiment, an annular space is formed between the outer wall and the inner wall of the outer cylinder outside the fluidic element, the annular space extends to the end of the outer cylinder far away from the inner cylinder so as to form a fourth channel communicated with the first channel.

In a preferred embodiment, a splitter plate is arranged on one side of the fluidic element far away from the first cavity, and the splitter plate is provided with a first liquid inlet communicated with the second channel and the third channel and a second liquid inlet communicated with the second channel and the fourth channel.

In a preferred embodiment, a second cavity is arranged on one side of the flow dividing plate far away from the fluidic element, a floating valve is arranged in the second cavity, the floating valve is provided with a fluidic channel communicated with the second channel and the fluidic element, and a liquid discharge channel communicated with the fourth channel is formed between the floating valve and the second cavity. A first step portion is formed between the second cavity and the first channel, and the floating valve can move in the second cavity to have a first position enabling the liquid discharge channel to be communicated with the second channel and a second position abutting against the first step portion to cut off communication between the liquid discharge channel and the second channel.

In a preferred embodiment, the float valve is connected to the diverter plate by a second resilient member.

In a preferred embodiment, an oil filling hole and an exhaust hole which penetrate through the outer wall of the outer cylinder body are respectively arranged on the outer cylinder body.

In a preferred embodiment, a second step is formed on the outer wall of the inner cylinder, and a chamfer is formed on the second step.

In a preferred embodiment, the end part of the outer cylinder body close to the inner cylinder body is also sleeved with an anti-impact gland, and a sealing ring is arranged between the anti-impact gland and the outer wall of the outer cylinder body.

Drawings

The invention will now be described with reference to the accompanying drawings.

Fig. 1 shows a schematic view of a jet hydraulic shock fairing according to one embodiment of the invention.

Fig. 2 is a schematic diagram of the fluidic elements of the fluidic hydraulic shock drag reduction device shown in fig. 1.

Fig. 3 is a schematic diagram of a first disc valve of the jet hydraulic shock fairing shown in fig. 1.

In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.

Detailed Description

The invention is described below with reference to the accompanying drawings.

Fig. 1 shows a jet hydraulic shock fairing 100 according to one embodiment of the invention. As shown in fig. 1, the jet-type hydraulic shock resistance reducing device 100 includes an outer cylinder 10 and an inner cylinder 20, and the inner cylinder 20 is inserted into the outer cylinder 10, so that the outer cylinder 10 can move relative to the inner cylinder 20 in the axial direction. Meanwhile, a first elastic member 22 is disposed between the outer cylinder 10 and the inner cylinder 20 in the axial direction so that the outer cylinder 10 and the inner cylinder 20 are relatively fixed.

As shown in fig. 1, the inner cylinder 20 is configured in a tubular shape, and a first passage 25 for fluid communication is defined in the inner cylinder 20. A second passage 15 is defined in the outer cylinder 10 in communication with the first passage 25, and a fluidic element 30 is disposed within the second passage 15.

Fig. 2 is a schematic diagram of the fluidic element 30 of the fluidic hydraulic shock fairing 100 shown in fig. 1. As shown in fig. 2, a fluid inlet 31 is provided at a first end of the fluidic element 30, and two fluid outlets 32 are provided at a second end of the fluidic element 30 remote from the fluid inlet 31. The high-pressure fluid entering from the fluid inlet 31 can periodically flow out of the two fluid outlets 32 after passing through the fluidic element 30, so that alternating jets can be generated at the fluid outlets 32. The structure and principles of such fluidic elements 30 are well known to those skilled in the art and a detailed description thereof is omitted herein.

As shown in fig. 1, a first cavity 40 is also connected to the fluidic element 30 at the fluid outlet 32. A movable member 45 is disposed within the first chamber 40 and is movable within the first chamber 40. The movable member 45 divides the first chamber 40 into an upper chamber 44 and a lower chamber 46 which are independent of each other, and the upper chamber 44 and the lower chamber 46 are respectively communicated with the two fluid outlets 32 of the fluidic device 30.

Thus, when fluid entering the fluidic element 30 enters the upper chamber 44 from the fluid outlet 32 communicating with the upper chamber 44, the moveable member 45 will oscillate toward the lower chamber 46 under the influence of the fluid pressure. Similarly, when fluid entering the fluidic device 30 enters the lower chamber 46 from the fluid outlet 32 communicating with the lower chamber 46, the moveable member 45 oscillates in a direction approaching the upper chamber 44. It will be readily appreciated that the periodic oscillation of the movable member 45 within said first cavity 40 can be achieved by means of an alternating jet generated by the fluidic element 30 at the fluid outlet 32.

As shown in fig. 1, a valve mechanism 251 is further disposed within the first passage 25, the valve mechanism 251 including a first disk valve 50 disposed at an end of the first chamber 40 remote from the fluidic element 30. The first disc valve 50 is connected to the movable member 45. Meanwhile, the diameter of the first disk valve 50 is smaller than the diameter of the second passage 15. Thus, when the movable element 45 periodically oscillates in the first chamber 40, the first disc valve 50 can be periodically oscillated in the second channel 15.

Meanwhile, the valve mechanism 251 further includes a second disk valve 60 disposed at an end of the first disk valve 50 remote from the fluidic element 30. The diameter of the second disk valve 60 is configured to be the same as the inner diameter of the second passage 15, thereby enabling the second disk valve 60 to abut against the inner wall of the second passage 15 to be fixed within the second passage 15. When the first disk valve 50 oscillates periodically, the first disk valve 50 and the second disk valve 60 move relative to each other in the radial direction of the second passage 15.

Fig. 3 is a schematic diagram of the first disc valve 50 of the fluidic hydraulic shock fairing 100 shown in fig. 1. As shown in fig. 3, the first disk valve 50 is configured in a disk shape. A plurality of first through holes 52 are provided in the first disk valve 50. Likewise, the second disk valve 60 is configured in a disk shape, and a plurality of second through holes (not shown) are provided in the second disk valve 60. The first through holes 52 and the second through holes correspond one to one, respectively, to form third passages 55 through which fluid flows. After the high-pressure fluid flows out of the first cavity 40, the high-pressure fluid can reach the end part of the outer cylinder 10 far away from the inner cylinder 20 through the first through hole 52 and the second through hole which are communicated with each other at a time and flow out of the outer cylinder 10.

And when the first disc valve 50 is periodically oscillated on the second disc valve 60 by the movable member 45. The first and second through holes 52 and 55 are periodically staggered and connected, resulting in periodic decreases and increases in the effective diameter of the third passage 55.

It will be readily appreciated that as the effective diameter of the third passageway 55 decreases, the fluid pressure of the high pressure fluid flowing through the third passageway 55 also increases. The pressure generated by the fluid acts on the outer cylinder 10, so that a force toward the inner cylinder 20 is applied to the outer cylinder 10, and the outer cylinder 10 is pushed to move closer to the inner cylinder 20. As this movement progresses, the first elastic member 22 is gradually compressed until the elastic force generated by the first elastic member 22 is balanced with the pressure of the fluid.

As the effective diameter of the third passageway 55 increases, the fluid pressure of the high pressure fluid flowing through the third passageway 55 also decreases. The first elastic member 22 in the compressed state pushes the outer cylinder 10 to move away from the inner cylinder 20 until the elastic force generated by the first elastic member 22 is balanced with the pressure of the fluid.

In summary, the periodic oscillation of the first disc valve 50 can control the inner cylinder 20 to reciprocate axially relative to the outer cylinder 10, so as to periodically change the length of the jet hydraulic oscillation damping device 100 of the present invention. When the jet hydraulic shock fairing 100 of the present invention is installed in a drill string (not shown) of an oil well, the periodic length change will drive the drill string to vibrate periodically in the axial direction, thereby effectively reducing the friction between the drill string and the well wall.

In a preferred embodiment, as shown in fig. 1, an annular space 13 is provided between the outer wall and the inner wall of the outer cylinder 10 outside the fluidic element 30, and the annular space 13 extends to the end of the outer cylinder 10 away from the inner cylinder 20. So that said annular space 13 forms a fourth channel 16 in fluid communication, said fourth channel 16 being in communication with the second channel 15.

In particular, as shown in fig. 1, a diverter plate 70 is provided on a side of the fluidic element 30 remote from the first cavity 40. The diverter plate 70 has a first inlet 72 communicating with the second channel 15 and the first chamber 40, and a second inlet 74 communicating with the second channel 25 and the fourth channel 16.

When the high-pressure fluid flows from the second channel 15 to the diversion plate 70, a part of the fluid can enter the first cavity 40 through the first inlet port 72, so that a periodically changing pressure is generated to push the inner cylinder 20 to move. Another portion of the fluid will flow along the second intake port 74 to the fourth passageway 16 and thus normally through the hydraulic shock fairing 100 for normal drilling cycle operation.

Through the arrangement, part of the underground drilling fluid can normally participate in the drilling circulation operation on the premise of not influencing the normal operation of the hydraulic shock resistance reducing device 100, so that the loss of the hydraulic shock resistance reducing device 100 to the drilling fluid pressure is effectively reduced, and the normal drilling operation is prevented from being influenced by the friction and resistance reducing process.

In a preferred embodiment, as shown in fig. 1, a second cavity 80 is further provided on a side of the diverter plate 70 remote from the fluidic element 30. A float valve 85 is disposed within the second cavity 80, the float valve 85 having a fluidic channel 84 communicating the second channel 15 with the fluidic element 30. Meanwhile, a liquid discharge passage 86 communicating with the fourth passage 16 is formed between the float valve 85 and the second chamber 80.

Meanwhile, a first step 18 is formed between the second cavity 80 and the second channel 15. The float valve 85 is movable in the second chamber 80 so as to have a first position in which it places the discharge channel 86 in communication with the second channel 15, and a second position in which it abuts against the first step 18, so as to shut off the communication between the discharge channel 86 and the second channel 15.

When there is no fluid flow in the first passage 25, the float valve 85 is in a first position, in which communication between the second passage 15 and the fourth passage 16 is shut off. When fluid flows through the first passage 25, the float valve 85 is displaced by the fluid pressure in a direction approaching the fluidic element 30, thereby opening communication between the second passage 15 and the fourth passage 16. As the fluid pressure increases, the larger the displacement by which the float valve 85 moves, the larger the opening between it and the first step portion 18. At this point, the flow of fluid to the third passageway 16 also increases and the flow of fluid to the fluidic element 30 decreases.

Thus, by means of the float valve 85, the flow rates of the fluids flowing into the fourth channel 16 and the fluidic element 30, respectively, can be automatically adjusted according to the fluid pressure, so that the thrust exerted by the fluids on the inner cylinder 20 is always kept within a specific range. Through the arrangement, on one hand, the stability of the jet-type hydraulic shock resistance reducing device 100 can be improved, and on the other hand, the loss of the fluid pressure of the hydraulic shock resistance reducing device 100 can be reduced.

Further, the float valve 80 is connected to the flow dividing plate 70 by a second elastic member 88. The second resilient member 88 is configured to be in an unstressed natural state when the float valve 85 is in the first position. The float valve 85 can be automatically returned to the first position by the second resilient member 88 when no fluid passes through the second passage 15. Meanwhile, the second elastic member 88 may provide a resistance force when the fluid pushes the float valve 85, so that the worker may adjust the impact force required when the fluid pushes the float valve 85 to a specific position by adjusting the elastic force of the second elastic member 88.

In a preferred embodiment, as shown in fig. 1, oil holes 12 penetrating through the outer wall of the outer cylinder 10 are respectively formed on the outer cylinder 10. Lubricating oil can be injected into a small gap (not shown) between the outer cylinder 10 and the inner cylinder 20 in the radial direction through the oil injection holes 12, so that the frictional force between the inner cylinder 20 and the outer cylinder 10 is reduced, thereby further facilitating the movement between the inner cylinder 20 and the outer cylinder 10 in the axial direction. Meanwhile, the sliding abrasion between the inner cylinder 20 and the outer cylinder 10 can be reduced by injecting lubricating oil, so that the service life of the inner cylinder 20 and the outer cylinder 10 can be prolonged.

Further, the outer cylinder 10 is provided with an exhaust hole 14 penetrating through the outer wall of the outer cylinder. The exhaust holes 14 can exhaust gas in a small gap between the outer cylinder 10 and the inner cylinder 20 in the radial direction during oil filling, so that the gas is prevented from generating pressure-holding during the oil filling to block the filling of lubricating oil. Meanwhile, the exhaust holes 14 can exhaust gas, so that the air tightness of the hydraulic shock damping device 100 can be improved.

In a preferred embodiment, a second step 24 is formed on the outer wall of the inner cylinder 20. The second step portion 24 can abut against the outer cylinder 10 after the relative movement between the outer cylinder 10 and the inner cylinder 20 occurs, so that a limiting effect is generated, and the relative movement between the outer cylinder 10 and the inner cylinder 20 is hindered. At the same time, a chamfer 241 is also formed on the second step 24. The chamfer 241 can reduce the loss of the outer cylinder 10 due to the impact when the second step portion 24 and the outer cylinder 10 are impacted together, thereby prolonging the service life of the outer cylinder 10.

In a preferred embodiment, an anti-impact gland 17 is further sleeved at the end of the outer cylinder 10 close to the inner cylinder 20. The impact-resistant gland 17 is configured as a cover body that is sleeved on the outer cylinder 10. The impact-preventing cover 17 is preferably made of an elastic material so as to absorb an impact load caused by an impact through elastic deformation when the second step portion 24 collides with the outer cylinder 10, thereby reducing damage to the outer cylinder 10 and the second step portion 24 caused by the impact.

Meanwhile, a sealing ring 19 is arranged between the impact-proof gland 17 and the outer wall of the outer cylinder 10. The sealing ring 19 is sleeved on the outer wall of the outer cylinder 10 to seal a gap generated between the impact-preventing gland 17 and the outer cylinder 10, so that the sealing performance of the jet flow type hydraulic shock resistance reducing device 100 of the invention is further improved.

In addition, in the present invention, the outer cylinder 10 and the inner cylinder 20 are connected by splines. The spline connection can keep the synchronous rotation of the outer cylinder 10 and the inner cylinder 20 all the time without influencing the axial movement between the outer cylinder 10 and the inner cylinder 20, thereby preventing the outer cylinder 10 and the inner cylinder 20 from being disengaged due to the asynchronous rotation during the rotation of the well drilling.

The operation of the jet hydraulic oscillation damping device 100 according to the invention is briefly described below.

In the process of oil drilling, the jet-type hydraulic shock resistance reducing device 100 is connected to a drill string and is lowered into an oil well along with the drill string.

When high pressure drilling fluid is flowing through the drill string to the float valve 85 of the first passage, the pressure of the fluid will overcome the force of the second resilient member 88 to move the float valve 85 closer to the fluidic element 30. Thereby allowing a portion of the fluid to enter the fluidic element 30 and another portion of the fluid to exit the hydroscillating fairing 100 through the fourth passage 16.

After the fluid passes through the fluidic element 30, the fluidic element 30 converts the fluid into an alternating jet, so as to push the movable member 45 to swing in the first cavity 40, thereby driving the first disc valve 50 to periodically swing on the second disc valve 60. As this oscillation progresses, the effective diameter of the third passage 55 periodically increases and decreases. Thereby, the pressure of the fluid passing through the third passage 55 is periodically increased and decreased. This pressure will overcome the elastic force of the first elastic member 22 and urge the outer sleeve 10 and the inner sleeve to reciprocate in the axial direction. Thereby periodically changing the size of the hydraulic shock fairing 100.

Along with the size change of the hydraulic shock resistance reducing device 100, the underground drill string can be driven to generate periodic vibration, so that the friction force between the drill string and the well wall in the drilling process is reduced, and the drilling efficiency in the whole drilling process is improved.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A jet hydraulic shock fairing (100) comprising:

an outer cylinder (10) and an inner cylinder (20) inserted into the outer cylinder, a first passage (25) for fluid communication being defined in the inner cylinder, a second passage (15) communicating with the first passage being defined in the outer cylinder, the inner cylinder being movable in an axial direction of the outer cylinder;

a first elastic member (22) fixing the relative positions of the outer cylinder and the inner cylinder, and,

a fluidic element (30) arranged in the second channel, to which a moving part (45) is connected, the fluidic element being able to generate an alternating jet that drives the moving part in a periodic movement,

wherein, still connect valve mechanism (251) on the moving part, the valve mechanism can be under the drive of moving part changes the pressure of the fluid that flows through valve mechanism periodically, the pressure can overcome the elasticity of first elastic component, makes the interior barrel along the axial with outer barrel periodic motion.

2. The jet hydraulic shock fairing (100) of claim 1 wherein a first chamber (40) is connected to the fluidic element and the moveable member is disposed within the first chamber and separates the first chamber into an upper chamber (44) and a lower chamber (46), and the alternating jets generated by the fluidic element are capable of periodically entering the upper chamber and the lower chamber to propel the moveable member to oscillate within the first chamber.

3. The fluidic hydraulic shock damping device (100) according to claim 2, wherein the valve mechanism comprises a first disc valve (50) arranged in the first channel and connected with the movable member and a second disc valve (60) arranged on the side of the first disc valve far away from the fluidic element, wherein a plurality of first through holes (52) and second through holes are respectively arranged on the first disc valve and the second disc valve, and the second through holes are respectively communicated with the first through holes, so that the first through holes and the second through holes are formed into third channels (55) communicated with the first channel;

the second disc valve is fixed in the second channel, and the first disc valve can swing in the first channel under the driving of the movable piece.

4. The fluidic hydraulic shock fairing (100) of any of the claims 1 to 3, characterized in that there is an annular space (13) between the outer wall and the inner wall of the outer cylinder outside the fluidic elements, said annular space extending to the end of the outer cylinder away from the inner cylinder forming a fourth channel (16) of fluid communication, said fourth channel being in communication with the first channel.

5. The jet hydraulic shock drag reduction device (100) according to any one of claims 1 to 3, wherein a splitter plate (70) is provided on the side of the jet element away from the first cavity, the splitter plate having a first inlet port (72) communicating the second and third channels and a second inlet port (74) communicating the second and fourth channels.

6. The fluidic hydraulic shock fairing (100) of claim 5, characterized in that a second chamber (80) is provided at the side of the diverter plate remote from the fluidic elements, a float valve (85) is provided in the second chamber, the float valve having a fluidic channel (84) communicating the second channel with the fluidic elements, a liquid discharge channel (86) communicating with the fourth channel being formed between the float valve and the second chamber,

a first step (18) is formed between the second chamber and the first passage, and the float valve is movable within the second chamber to have a first position in which the liquid discharge passage communicates with the second passage, and a second position in which the float valve abuts against the first step to block communication between the liquid discharge passage and the second passage.

7. The fluidic hydraulic shock fairing (100) of claim 6, wherein the float valve is connected to the diverter plate by a second resilient member (88).

8. The jet hydraulic shock resistance reducing device (100) according to any one of claims 1 to 3, wherein an oil filling hole (12) and an air exhaust hole (14) penetrating through the outer wall of the outer cylinder are further respectively arranged on the outer cylinder.

9. The fluidic hydraulic shock fairing (100) of any of claims 1 to 3, characterized in that a second step (24) is configured on the outer wall of the inner barrel, said second step having a chamfer (241) configured thereon.

10. The jet flow type hydraulic shock resistance reducing device (100) according to any one of claims 1 to 5, wherein an impact gland cover (17) is further sleeved at the end part of the outer cylinder body close to the inner cylinder body, and a sealing ring (19) is further arranged between the impact gland cover and the outer wall of the outer cylinder body.

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