CN214365966U

CN214365966U - Well descending friction-reducing hydraulic vibrator

Info

Publication number: CN214365966U
Application number: CN202120217303.4U
Authority: CN
Inventors: 石小磊; 黄文君; 高德利
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-10-08
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses an underground friction-reducing and resistance-reducing hydraulic vibrator, which comprises a cylinder component and a vibration component; the vibration assembly comprises a vibration plug, a vibration mechanism and a double-acting hydraulic cylinder mechanism; the double-acting hydraulic cylinder mechanism comprises an inner pipe body, an inner valve, an outer valve and a sliding block body sleeved outside the inner pipe body; the inner tube body comprises an upper tube and a lower tube; wherein, an upper hydraulic cavity is arranged between the upper pipe and the sliding block body; the slider body can reciprocate between a first position and a second position under hydraulic drive; when the sliding block body is at a first position, the inner valve is closed to block the interior of the upper pipe and the upper hydraulic cavity, and the outer valve is opened to communicate the upper hydraulic cavity with the interior of the lower pipe; the slider body compresses the vibrating spring when in the second position, the internal valve is opened and will the inside of upper tube with go up the hydraulic chamber and be linked together, the external valve is closed will go up the hydraulic chamber with the inside of lower tube with go up the hydraulic chamber and be linked together.

Description

Well descending friction-reducing hydraulic vibrator

Technical Field

The utility model relates to an oil and natural gas engineering technical field especially relates to a friction reduction hydraulic vibrator falls in pit.

Background

Petroleum and natural gas are used as important parts of national energy strategies, and play an extremely important role in guaranteeing the safety and stability of the country. In large oil fields at home and abroad, the recovery ratio of oil reservoirs is improved mainly by drilling horizontal wells, extended reach wells, multilateral wells and other wells with complex structures, so that the exploitation cost is reduced. Compared with a common well body structure, the horizontal well, the extended reach well and the like have the remarkable characteristic that the horizontal well, the extended reach well and the like have very large friction torque, and due to the characteristics of large inclination angle, long stable inclination section and the like, the vast majority of the dead weight of the pipe column of the large inclination section can press against the well wall, the descending resistance of the pipe column is increased, and therefore very large friction force can be generated between the pipe column and a well hole. Thus, the longer the length of the well is run in, the greater the friction between the string and the borehole will be overcome when the string is run in the well. The friction force greatly reduces the effective bit pressure transmitted to the drill bit, reduces the drilling speed, greatly limits the running of the pipe column and can cause the abrasion of the pipe column. When the friction force is increased to be large enough, sinusoidal bending and spiral buckling of the pipe string can be caused, and self-locking of the underground pipe string can be caused in severe cases.

In the process of rotary drilling, the rotary power of the underground drill bit is transmitted to the drill bit through the drill string by the driving device on the drill floor, and the torque power is very difficult to transmit due to the existence of the friction force between the drill string and the well wall, so that the loss of effective driving torque is increased, the efficiency of the drilling machine is influenced, and the maximum drilling capacity of the drilling machine is reduced. The increase of friction resistance and torque brings great difficulty to the drilling construction and the subsequent casing running work. The friction problem is a core problem of a drilling project through the whole well completion design and the whole process of downhole operation, and the prediction and control of the friction torque are the key and the problem of the success of the drilling process.

Therefore, predictive analysis of the friction torque of the drill string and casing is necessary before drilling operations and casing running, and designing a friction reducing and drag reducing tool will greatly improve the success rate of drilling and extend the limits of the well bore. Therefore, the inventor designs the underground friction-reducing and resistance-reducing hydraulic vibrator by virtue of experience and practice of years in related industries, the device has a good friction-reducing and resistance-reducing effect, and meanwhile, the friction coefficient in actual drilling can be reduced, so that the device plays an important role in prolonging the service life of a drill string and a casing and improving the safety of drilling operation.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims to provide a friction reduction hydraulic vibrator falls in pit, this instrument can reduce the coefficient of friction of tubular column and the wall of a well at the tubular column income well in-process.

Another object of the utility model is to provide a friction reduction hydraulic vibrator falls in pit reduces the friction of tubular column and hinders the moment of torsion through the hydraulic vibration mode, greatly improves the life-span of tubular column and the success rate of well drilling test operation.

In order to realize at least one purpose, the utility model adopts the following technical scheme:

a downhole friction-reducing and drag-reducing hydraulic vibrator comprises an upper joint, a lower joint, a cylinder assembly connected between the upper joint and the lower joint, and a vibration assembly arranged in the cylinder assembly; the outer wall of the cylinder component is provided with a roller;

the vibration assembly comprises a vibration plug, a vibration mechanism and a double-acting hydraulic cylinder mechanism which are fixedly arranged in the cylinder assembly; the double-acting hydraulic cylinder mechanism comprises an inner pipe body, an inner valve, an outer valve and a sliding block body sleeved outside the inner pipe body; the inner tube body comprises an upper tube and a lower tube; the lower pipe is sleeved with a vibration spring;

wherein, an upper hydraulic cavity is arranged between the upper pipe and the sliding block body; a vibration seat is arranged inside the upper pipe; the vibration seat is provided with a through hole which is communicated along the axial direction; the vibrating mechanism comprises a vibrating rod and a return spring sleeved on the vibrating rod; the vibrating rod is arranged opposite to the vibrating plug and can be axially movably arranged on the through hole of the vibrating seat; the return spring applies acting force to the vibrating rod to move towards the vibrating plug; a liquid inlet hole communicated with the upper hydraulic cavity is formed in the upper pipe above the vibration seat;

the slider body can reciprocate between a first position and a second position under hydraulic drive;

when the sliding block body is at a first position, the inner valve is closed to block the interior of the upper pipe and the upper hydraulic cavity, and the outer valve is opened to communicate the upper hydraulic cavity with the interior of the lower pipe;

the slider body compresses the vibrating spring when in the second position, the inner valve is opened and is communicated with the inside of the upper pipe and the upper hydraulic cavity, and the outer valve is closed and is communicated with the inside of the upper hydraulic cavity and the lower pipe and the upper hydraulic cavity.

As a preferred embodiment, a rod cap is fixed at the upper end of the vibrating rod, and a vibrating disk is fixedly connected below the vibrating seat by the lower end of the vibrating rod passing through the through hole; the reset spring is sleeved outside the vibrating rod and positioned between the rod cap and the vibrating seat.

In a preferred embodiment, the vibrating plug is provided with a plurality of orifices, and a top rod facing the vibrating rod is provided above the vibrating rod.

As a preferred embodiment, the sliding block body has an upper end which is fit and sleeved on the outer wall of the upper pipe, and a lower end which is fit and sleeved on the outer wall of the lower pipe; the inner valve and the outer valve are disposed between the upper end and the lower end of the slider body.

In a preferred embodiment, the inner valve and the outer valve are circumferentially spaced.

As a preferred embodiment, the lower end of the upper tube is provided with an upper annular valve table attached to the inner wall of the slider body; the upper end of the lower pipe is provided with a lower annular valve table attached to the inner wall of the sliding block body; the upper annular valve table and the lower annular valve table are also fixedly connected through an interval inclined plate;

the upper annular valve table is provided with an upper inner valve hole and an upper outer valve hole which are spaced along the circumferential direction; the lower annular valve table has a lower inner valve bore opposite the upper inner valve bore and a lower outer valve bore opposite the upper outer valve bore; the upper end of the interval sloping plate is close to the upper outer valve hole, and the lower end of the interval sloping plate is close to the lower inner valve hole;

the inner valve comprises an inner valve core positioned between the upper inner valve hole and the lower inner valve hole and a first valve shaft penetrating through the upper inner valve hole and the lower inner valve hole;

the outer valve includes: the valve comprises an upper valve plate positioned above an upper outer valve hole, a lower valve plate positioned below a lower outer valve hole and a second valve shaft which is arranged in a penetrating manner, wherein the upper outer valve hole and the lower outer valve hole are connected with the upper valve plate and the lower valve plate.

As a preferred embodiment, an outer valve cavity communicated with the interior of the lower pipe is arranged between the upper outer valve hole and the lower outer valve hole; the upper inner valve hole and the upper outer valve hole are communicated with the upper hydraulic cavity; an inner valve cavity communicated with the interior of the upper pipe is arranged between the upper inner valve hole and the lower inner valve hole;

as a preferred embodiment, a lower hydraulic cavity is arranged between the lower pipe and the slider body; the lower external valve hole and the lower internal valve hole are communicated with the lower liquid cavity;

when the sliding block body is located at the first position, the inner valve core blocks the upper inner valve hole and opens the lower inner valve hole, and the upper valve plate opens the upper outer valve hole and closes the lower outer valve hole;

when the sliding block body is located at the second position, the inner valve core opens the upper inner valve hole and closes the lower inner valve hole, and the upper valve plate closes the upper outer valve hole and opens the lower outer valve hole.

In a preferred embodiment, the upper end of the upper pipe is provided with a conical cavity below the vibrating plug; the liquid inlet hole is positioned below the conical cavity.

As a preferred embodiment, the cartridge assembly comprises an inner cartridge and an outer cartridge sleeved with each other; the roller can freely rotate and is fixed on the outer cylinder; the outer cylinder is sleeved on the outer layer of the inner cylinder; the inner cylinder is connected with the upper joint and the lower joint through screw threads.

Has the advantages that:

the utility model relates to an embodiment provides a friction reduction hydraulic vibrator falls in pit can go into the well in-process at the tubular column and reduce the coefficient of friction of tubular column and the wall of a well to reduce the friction moment of torsion of tubular column through the hydraulic vibration mode, greatly improve the life-span of tubular column and the success rate of well drilling test operation. Moreover, during the drilling and testing operation, the number and the positions of the vibrators are reasonably arranged, so that necessary help is provided for the safety of the pipe column and the smooth operation of production operation.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural view of a well-descending friction-reducing hydraulic vibrator provided by an embodiment of the present invention;

FIG. 2 is a schematic view of the up-stroke state of the slider body of FIG. 1;

FIG. 3 is a schematic view of the down stroke state of the slider body of FIG. 1.

Description of reference numerals: 1. an upper joint; 2. an outer cylinder; 3. a roller; 4. an inner barrel; 5. an orifice; 6. a vibrating plug; 7. a rod cap; 8. a return spring; 9. a liquid inlet hole; 10. a vibrating pan; 11. an internal valve; 12. an outer valve; 13. a slider body; 14. a vibration spring; 15. a lower joint; 16. an inner tube body; 17. a vibrating rod; 18. a vibration seat; 19. a tapered cavity; 110. an inner valve core; 121. an upper valve plate; 122. a lower valve plate; 131. an upper hydraulic chamber; 132. a lower hydraulic chamber; 161. feeding a pipe; 162. a lower pipe; 163. an interval sloping plate; 165. an upper annular valve table; 166. a lower annular valve table.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a downhole friction-reducing and drag-reducing hydraulic vibrator, which includes an upper joint 1, a lower joint 15, a cylinder assembly connected between the upper joint 1 and the lower joint 15, and a vibration assembly installed in the cylinder assembly; and the outer wall of the cylinder component is provided with a roller 3.

The vibration component comprises a vibration plug 6, a vibration mechanism and a double-acting hydraulic cylinder mechanism which are fixedly arranged in the cylinder component. The double-acting hydraulic cylinder mechanism comprises an inner pipe body 16, an inner valve 11, an outer valve 12 and a sliding block body 13 sleeved outside the inner pipe body 16. The inner tube 16 includes an upper tube 161 and a lower tube 162. The upper tube 161 and the lower tube 162 are fixedly connected and fixed relative to each other. The lower tube 162 is sleeved with a vibration spring 14. The double-acting hydraulic cylinder mechanism can control the opening and closing states of the inner valve 11 and the outer valve 12 to perform drainage by changing the reciprocating motion of the slider body 13 filled with liquid, thereby generating vibration.

Wherein an upper hydraulic chamber 131 is provided between the upper tube 161 and the slider body 13. The upper tube 161 is provided with a vibration seat 18 inside. The vibration seat 18 is provided with a through hole which is through along the axial direction. The vibrating mechanism comprises a vibrating rod 17 and a return spring 8 sleeved on the vibrating rod 17. The vibration rod 17 is arranged on the through hole of the vibration seat 18 in a penetrating way. The vibrating rod 17 is disposed opposite to the vibrating plug 6 and is axially movably mounted on the through hole of the vibrating base 18. The return spring 8 applies a force to the vibration rod 17 to move toward the vibration plug 6. The upper pipe 161 is further provided with a liquid inlet hole 9 which leads into the upper hydraulic cavity 131 above the vibration seat 18.

The slider body 13 is capable of reciprocating between a first position and a second position under hydraulic drive. As shown in fig. 2 and 3, the upward stroke is performed when the slider body 13 moves from the second position to the first position, and the downward stroke is performed when the slider body moves from the first position to the second position. Specifically, when the slider body 13 is in the first position, the inner valve 11 is closed to block the interior of the upper tube 161 from the upper hydraulic chamber 131, and the outer valve 12 is opened to communicate the upper hydraulic chamber 131 with the interior of the lower tube 162. When the slider body 13 compresses the vibration spring 14 at the second position, the inner valve 11 is opened to communicate the inside of the upper tube 161 with the upper hydraulic chamber 131, and the outer valve 12 is closed to communicate the inside of the upper hydraulic chamber 131 with the lower tube 162 with the upper hydraulic chamber 131.

In this embodiment, the damper plug 6 is provided with a plurality of orifices 5, and a top rod opposed to the damper rod 17 is provided above the damper rod 17. The ram is centrally located on the vibrating plug 6. The upper end of the upper tube 161 is provided with a tapered cavity 19 below the vibrating plug 6. The tapered chamber 19 is provided by an accelerator pipe portion provided at the upper end of the upper pipe 161. The liquid inlet hole 9 is positioned below the conical cavity 19. The barrel component comprises an inner barrel 4 and an outer barrel 2 which are sleeved with each other. The roller 3 can rotate freely and is fixed on the outer cylinder 2. The outer cylinder 2 is sleeved on the outer layer of the inner cylinder 4. The inner cylinder 4 is connected with the upper joint 1 and the lower joint 15 through screw threads.

In the present embodiment, the oscillating rod 17 is mounted on the oscillating base 18 to move up and down in the axial direction, thereby generating oscillation. Specifically, a rod cap 7 is fixed to the upper end of the vibration rod 17. The lower end of the vibrating rod 17 penetrates through the through hole and is fixedly connected with a vibrating disk 10 below the vibrating seat 18. The return spring 8 is sleeved outside the vibrating rod 17 and is positioned between the rod cap 7 and the vibrating seat 18. The rod cap 7 and the vibration plate 10 at both ends of the vibration rod 17 limit the displacement of the vibration rod 17.

In this embodiment, the slider 13 has an upper end fitted on the outer wall of the upper tube 161 and a lower end fitted on the outer wall of the lower tube 162. The inner valve 11 and the outer valve 12 are disposed between the upper and lower ends of the slider body 13. Wherein the inner valve 11 and the outer valve 12 are arranged at intervals in the circumferential direction.

The underground friction-reducing and resistance-reducing hydraulic vibrator provided by the embodiment can reduce the friction coefficient between the pipe column and the well wall in the process of the pipe column entering the well, reduces the friction resistance torque of the pipe column in a hydraulic vibration mode, and greatly prolongs the service life of the pipe column and improves the success rate of drilling test operation. Moreover, during the drilling and testing operation, the number and the positions of the vibrators are reasonably arranged, so that necessary help is provided for the safety of the pipe column and the smooth operation of production operation.

In this embodiment, the lower end of the upper tube 161 is provided with an upper annular valve stage 165 attached to the inner wall of the slider body 13. The upper end of the lower tube 162 is provided with a lower annular valve stand 166 attached to the inner wall of the slider body 13. The upper annular valve table 165 and the lower annular valve table 166 are also fixedly connected by a spacer swash plate 163.

The upper annular valve table 165 has circumferentially spaced upper inner and outer valve bores. The lower annular valve table 166 has a lower inner valve bore opposite the upper inner valve bore and a lower outer valve bore opposite the upper outer valve bore. The upper end of the partition swash plate 163 is adjacent to the upper outer valve hole, and the lower end is adjacent to the lower inner valve hole.

Specifically, the internal valve 11 includes a valve core 110 of the internal valve 11 located between the upper internal valve hole and the lower internal valve hole, and a first valve shaft passing through the upper internal valve hole and the lower internal valve hole.

The outer valve 12 includes: the valve comprises an upper valve plate 121 positioned above an upper outer valve hole, a lower valve plate 122 positioned below a lower outer valve hole, and a second valve shaft which is arranged in the upper outer valve hole and the lower outer valve hole in a penetrating mode and connects the upper valve plate 121 and the lower valve plate 122.

Specifically, an outer valve 12 cavity is formed between the upper outer valve bore and the lower outer valve bore and communicates with the interior of the lower tube 162. The upper internal valve bore and the upper external valve bore open into the upper hydraulic chamber 131. An inner valve 11 cavity communicated with the inside of the upper pipe 161 is arranged between the upper inner valve hole and the lower inner valve hole. Further, a lower hydraulic chamber 132 is provided between the lower tube 162 and the slider body 13. The upper and lower

hydraulic chambers

131 and 132 are formed by the upper and lower annular valve lands 165 and 166 that seal off the annulus between the slider body 13 and the inner tube 16. The lower outer valve hole and the lower inner valve hole are communicated with the lower liquid cavity.

When the slider body 13 is located at the first position, the valve core 110 of the inner valve 11 closes the upper inner valve hole and opens the lower inner valve hole, and the upper valve plate 121 opens the upper outer valve hole and closes the lower outer valve hole.

When the slider body 13 is located at the second position, the valve core 110 of the inner valve 11 opens the upper inner valve hole and closes the lower inner valve hole, and the upper valve plate 121 closes the upper outer valve hole and opens the lower outer valve hole.

The working process of the downhole friction-reducing and drag-reducing hydraulic vibrator provided by the embodiment is as follows:

the upper joint 1 and the lower joint 15 are respectively connected with an upper pipe column and a lower pipe column, and after the integral pipe column is lowered into a well, the roller 3 is contacted with the wall of the well to drive the roller 3 to rotate. The liquid of the upper pipe column enters the tool (the well-descending friction-reducing hydraulic vibrator) through the upper connector 1, and due to the existence of the throttling hole 5, the liquid is gathered in a large amount in the cavity at the front ends of the upper connector 1 and the inner barrel 4, then throttled by the throttling hole 5 and rapidly flows into the cavity between the vibrating plug and the vibrating rod along the throttling hole 5. Then, a small portion of the liquid enters the upper hydraulic chamber 131 of the slider body 13 through the liquid inlet hole 9, and a large portion of the liquid displaces the vibration lever 17 downward due to the excessive pressure.

The downward movement of the oscillating rod 17 compresses the return spring, and the oscillating rod 17 is gradually pushed downward a small distance as the return spring is compressed. The through-hole of the vibration seat 18 is opened and the liquid flows into the double-acting hydraulic cylinder mechanism through the through-hole of the vibration seat 18. At this time, the slider body 13 is in the second position (or an initial position at a position intermediate between the first position and the second position), the inner valve 11 is in the state of being opened upward and closed downward, and the outer valve 12 is in the state of being opened upward and closed downward. That is, the upper inner valve hole of the inner valve 11 is opened, the lower inner valve hole is closed, the upper outer valve hole of the outer valve 12 is closed, and the lower outer valve hole is opened. The liquid enters the inner cavity (upper hydraulic cavity 131) of the slider body 13 through the internal valve 11, and with the increase of the entering liquid, the liquid pushes the slider body 13 to slide upwards, and large pressure is gradually formed due to the fact that the pressure cannot be relieved.

When the pressure is increased to a certain critical state, the slider body 13 moves to the first position, the slider body 13 pushes the inner valve 11 and the outer valve 12 to switch the on-off state, the inner valve 11 is opened up and closed down, and the outer valve 12 is opened up and closed down, namely, the lower inner valve hole of the inner valve 11 is opened, the upper inner valve hole is closed, the lower outer valve hole of the outer valve 12 is closed, and the upper outer valve hole is opened. A portion of the liquid enters the lower end cavity (lower hydraulic chamber 132) of the slider body 13, rapidly pushing the slider body 13 to slide downward until it hits the lower vibration spring 14 to the second position. In addition, a part of liquid directly enters the lower pipe 162 through the outer valve 12 and directly flows out of the lower joint 15 to form pressure release, the vibrating rod 17 is quickly contracted to impact the vibrating plug 6 to finish a vibrating process, and the like, so that a continuous vibrating effect is achieved.

After the vibrating rod 17 is reset, since liquid can only enter the upper hydraulic cavity through the liquid inlet hole basically, the hydraulic pressure above the vibrating rod 17 can be accumulated and increased rapidly, and the next vibration stroke can be performed rapidly.

During the drilling and testing operation, the reasonable arrangement of the number and the positions of the vibrators provides necessary help for the safety of the pipe column and the smooth operation of production operation.

Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed inventive subject matter.

Claims

1. A well down-friction and drag-reducing hydraulic vibrator, characterized in that it comprises an upper joint, a lower joint, a barrel assembly connected between the upper joint and the lower joint, and a vibration installed in the barrel assembly an assembly; a roller is provided on the outer wall of the cylinder assembly;

The vibrating assembly includes a vibrating plug, a vibrating mechanism, and a double-acting hydraulic cylinder mechanism that are fixedly arranged inside the cylinder assembly; the double-acting hydraulic cylinder mechanism includes an inner pipe body, an inner valve, an outer valve, and a the slider body outside the inner tube; the inner tube body includes an upper tube and a lower tube; the outer tube of the lower tube is provided with a vibration spring;

Wherein, there is an upper hydraulic chamber between the upper tube and the slider body; the upper tube is provided with a vibration seat; the vibration seat is provided with a through hole passing through in the axial direction; the vibration mechanism includes a vibration rod, a sleeve A reset spring on the vibrating rod; the vibrating rod and the vibrating plug are arranged opposite to the vibrating plug and are axially movably mounted on the through hole of the vibrating seat; The action force of the vibration plug moving; the upper pipe is also provided with a liquid inlet hole leading into the upper hydraulic chamber above the vibration seat;

the slider body can reciprocate between the first position and the second position under hydraulic drive;

When the slider body is in the first position, the inner valve is closed to block the interior of the upper pipe and the upper hydraulic chamber, and the outer valve is opened to block the upper hydraulic chamber and the interior of the lower pipe. connected;

When the slider body is in the second position, the vibration spring is compressed, the inner valve is opened to communicate the inside of the upper pipe with the upper hydraulic chamber, and the outer valve is closed to connect the upper hydraulic chamber to the upper hydraulic chamber. The inside of the lower pipe is communicated with the upper hydraulic chamber.

2 . The well descending friction and drag reducing hydraulic vibrator according to claim 1 , wherein a rod cap is fixed on the upper end of the vibrating rod, and the lower end of the vibrating rod passes through the through hole on the vibrating seat. 3 . A vibrating plate is fixedly connected below the vibrating plate; the restoring spring is sleeved outside the vibrating rod and is located between the rod cap and the vibrating seat.

3. The hydraulic vibrator for lowering friction and drag in a well as claimed in claim 2, wherein the vibrating plug is provided with a plurality of orifices, and above the vibrating rod is provided with a vibrating rod opposite to the vibrating rod. mandrel.

4 . The well descending friction reducing and drag reducing hydraulic vibrator according to claim 3 , wherein the slider body has an upper end that is fitted and sleeved on the outer wall of the upper pipe, and an upper end that is fitted and sleeved on the lower pipe. 5 . the lower end of the outer wall of the pipe; the inner valve and the outer valve are arranged between the upper end and the lower end of the slider body.

5 . The down-friction and drag-reducing hydraulic vibrator of claim 1 , wherein the inner valve and the outer valve are arranged at intervals along the circumferential direction. 6 .

6 . The well descending friction and drag reducing hydraulic vibrator according to claim 5 , wherein the lower end of the upper pipe is provided with an upper annular valve platform that fits on the inner wall of the slider; 6 . The upper end is provided with a lower annular valve table that is fitted to the inner wall of the slider; the upper annular valve table and the lower annular valve table are also fixedly connected by a spacer inclined plate;

The upper annular valve table has spaced upper inner valve holes and upper outer valve holes in the circumferential direction; the lower annular valve table has a lower inner valve hole opposite to the upper inner valve hole and a lower inner valve hole opposite to the upper outer valve hole The hole is opposite to the lower outer valve hole; the upper end of the interval inclined plate is close to the upper outer valve hole, and the lower end is close to the lower inner valve hole;

the inner valve comprises an inner valve core located between the upper inner valve hole and the lower inner valve hole, and a first valve shaft passing through the upper inner valve hole and the lower inner valve hole;

The outer valve comprises: an upper valve plate located above the upper outer valve hole, a lower valve plate located below the lower outer valve hole, and a lower valve plate located below the upper outer valve hole and the upper outer valve hole and the lower outer valve hole to connect the upper valve. The second valve shaft connecting the plate and the lower valve plate.

7 . The well down-friction and drag-reducing hydraulic vibrator according to claim 6 , wherein an outer valve cavity communicated with the inside of the lower pipe is provided between the upper outer valve hole and the lower outer valve hole; The inner valve hole and the upper outer valve hole lead into the upper hydraulic chamber; there is an inner valve chamber communicated with the inside of the upper pipe between the upper inner valve hole and the lower inner valve hole.

8 . The hydraulic vibrator for downhole friction and drag reduction according to claim 7 , wherein a lower hydraulic chamber is provided between the lower pipe and the slider body; the lower outer valve hole and the lower inner valve hole are provided. 9 . communicate with the lower liquid chamber;

When the slider body is in the first position, the inner valve core blocks the upper inner valve hole and opens the lower inner valve hole, and the upper valve plate opens the upper outer valve hole and closes the lower outer valve hole ;

When the slider body is in the second position, the inner valve core opens the upper inner valve hole and closes the lower inner valve hole, and the upper valve plate closes the upper outer valve hole and opens the lower outer valve hole.

9 . The down-friction and drag-reducing hydraulic vibrator of claim 1 , wherein the upper end of the upper pipe is provided with a conical cavity below the vibrating plug; the liquid inlet hole is located in the conical cavity. 10 . below the cavity.

10. The hydraulic vibrator according to claim 1, wherein the cylinder assembly comprises an inner cylinder and an outer cylinder which are sleeved with each other; the roller can rotate freely and is fixed on the outer cylinder; The outer cylinder is sleeved on the outer layer of the inner cylinder; the inner cylinder is connected with the upper joint and the lower joint through a screw thread.