CN215565738U

CN215565738U - Hydraulic oscillator for well drilling

Info

Publication number: CN215565738U
Application number: CN202122018777.9U
Authority: CN
Inventors: 不公告发明人
Original assignee: Chengdu Dingcheng Yufei Energy Technology Co ltd
Current assignee: Chengdu Dingcheng Yufei Energy Technology Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-01-18
Anticipated expiration: 2031-08-25

Abstract

The utility model provides a hydraulic oscillator for well drilling, which comprises a vibration assembly and a hydraulic driving assembly, wherein the vibration assembly comprises a first cylinder, a spring group, a central pipe and a fixed sleeve, the fixed sleeve is screwed into the first cylinder, the spring group is respectively abutted against one end of the central pipe and the lower end of the fixed sleeve, a disc spring is sleeved in the central pipe, the tail end of the central pipe is in threaded connection with an adjusting nut, and the disc spring is pressed on the surface of the fixed sleeve through the adjusting nut; the hydraulic driving assembly comprises a second cylinder, a stator, a rotor, a first valve plate and a second valve plate, the first cylinder is in threaded connection with the second cylinder, the stator is fixed inside the second cylinder, and the rotor rotates in the stator in an adherence manner; the first valve plate and the second valve plate are provided with liquid passing holes, the two valve plates are kept to be attached tightly, the end face of the first valve plate is fixedly connected with the rotor, and the rotor rotates to enable the liquid passing holes between the two valve plates to be periodically unblocked. The oscillator provided by the utility model is convenient for multi-section disassembly and part taking out for maintenance, and the vibration amplitude can be adjusted and controlled.

Description

Hydraulic oscillator for well drilling

Technical Field

The utility model relates to the technical field of hydraulic oscillators, in particular to a hydraulic oscillator for well drilling.

Background

Along with the increase of oil exploitation strength, more and more complicated structure wells such as highly difficult directional wells, horizontal wells, highly deviated wells and the like are available, and in the process of drill bit sliding drilling, along with the deepening of a well hole, the dead weight of a drill string mostly presses against the well wall, the friction resistance is continuously increased, the directional decompression is serious, the transmission of the bit pressure is difficult, the bit pressure cannot be effectively applied to the drill bit, the decompression is frequently released, and the tool surface is unstable.

Current hydraulic oscillator structure is comparatively complicated and compact inadequately, mostly is the integral type structure, makes in the drilling work of long-time vibration inconvenient after it damages to dismantle to overhaul to maintain or assemble, and its vibration range is great in the use in addition, and vibration frequency is low, transversely creeps into the well efficiency of beating of in-process to the front end drill bit and has adverse effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic oscillator for well drilling to solve the technical problems in the background technology.

The embodiment of the utility model is realized by the following technical scheme: a hydraulic oscillator for well drilling comprises a vibration assembly and a hydraulic driving assembly, wherein the vibration assembly consists of a first cylinder body, a spring group, a central pipe and a fixed sleeve, the fixed sleeve is screwed into the first cylinder body and fixed, two ends of the spring group are respectively abutted against one end of the central pipe and the lower end of the fixed sleeve, a disc spring is sleeved in the central pipe, the tail end of the central pipe is in threaded connection with an adjusting nut, and the disc spring is pressed on the surface of the fixed sleeve through the adjusting nut; the hydraulic drive assembly comprises a second cylinder, a stator, a rotor, a first valve plate and a second valve plate, the first cylinder is connected with the second cylinder through threads, the stator is fixed inside the second cylinder, and the rotor rotates in the stator in an adherence manner; the first valve plate and the second valve plate are provided with a plurality of liquid passing holes, the two valve plates are vertically arranged in a tightly attached mode, the end face of the first valve plate is fixedly connected with the rotor, and the rotor rotates to enable the liquid passing holes between the two valve plates to be periodically unblocked.

Furthermore, the lower end of the second cylinder is in threaded connection with a lower joint, the first valve plate is embedded in the bottom of the second cylinder through a bearing, the second valve plate is fixedly arranged in the lower joint, and a sealing structure for preventing leakage is arranged between the second valve plate and the lower joint.

Furthermore, the stator is of a wave-shaped long rod structure, and the inner wall side of the rotor is a curved surface matched with the stator in the rotating process.

Furthermore, the liquid passing holes are annularly and uniformly distributed around the center of the first valve plate at intervals, and the circumferential hole distance between the liquid passing holes is one liquid passing hole.

Furthermore, the spring group is composed of a plurality of extension springs and fixing rings fixedly connected with the extension springs at two ends.

Furthermore, the lower end of the central tube is in threaded connection with a baffle ring to support the fixing ring in an abutting mode.

Furthermore, a sealing structure is arranged at the joint of the first cylinder and the second cylinder, and a sealing structure is arranged at the close joint of the first cylinder and the fixed sleeve.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects: the oscillator provided by the utility model firstly moves back and forth along the axial direction of the central tube through the adjusting nut to press the disc spring so as to adjust and control the amplitude of the spring set in the vibration process, and the vibration frequency is increased, so that the vibration stability in the drilling process is influenced; secondly, the oscillator is divided into a plurality of sections, so that parts can be conveniently and reasonably placed in the cylinder body, the disassembly is convenient, the maintenance is facilitated, and the probability of the oscillator being stuck is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of an internal structure of a hydraulic oscillator for well drilling provided in example 1 of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural view of a center tube in the present invention;

fig. 4 is a schematic view of the first valve plate and the second raft plate in the present invention with liquid passing holes periodically staggered;

fig. 5 is a schematic structural view of a spring assembly according to the present invention.

Icon: 1-vibration component, 11-spring group, 111-fixing ring, 112-expansion spring, 12-first cylinder, 13-fixing sleeve, 14-central tube, 2-hydraulic drive component, 21-second cylinder, 22-rotor, 23-stator, 24-first valve plate, 25-second valve plate, 251-liquid passing hole, 3-lower joint, 4-adjusting nut, 5-disc spring, 6-sealing structure and 7-retaining ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Example 1

Further described below with reference to specific embodiments, referring to fig. 1 to 5, embodiment 1 is a hydraulic oscillator for drilling, including a vibration component 1 and a hydraulic drive component 2, where the vibration component 1 is composed of a first cylinder 12, a spring group 11, a central tube 14 and a fixed sleeve 13, the fixed sleeve 13 is screwed into the first cylinder 12 for fixation, two ends of the spring group 11 are respectively abutted to one end of the central tube 14 and a lower end of the fixed sleeve 13, the central tube 14 is sleeved with a disc spring 5, and a tail end of the central tube is connected with an adjusting nut 4 through a thread, and the disc spring 5 is pressed on a surface of the fixed sleeve 13 through the adjusting nut 4; the hydraulic driving assembly 2 comprises a second cylinder 21, a stator 23, a rotor 22, a first valve plate 24 and a second valve plate 25, the first cylinder 12 is connected with the second cylinder 21 through threads, the stator 23 is fixed inside the second cylinder 21, and the rotor 22 rotates in the stator 23 in an adherence manner; the first valve plate 24 and the second valve plate 25 are both provided with a plurality of liquid passing holes 251, the two valve plates are arranged in a vertically close manner, the end face of the first valve plate 24 is fixedly connected with the rotor 22, the rotor 22 rotates to enable the liquid passing holes 251 between the two valve plates to be periodically unblocked, specifically, the hydraulic oscillator in the hydraulic oscillator gradually arranges parts such as the spring group 11 and the central tube 14 in the first cylinder 12, and finally the fixing sleeve 13 is selected to prop against the spring group 11, so that the hydraulic oscillator is convenient to disassemble and assemble and is beneficial to opening in later-stage maintenance work, and the adjusting nut 4 on the central tube 14 can move back and forth along the axial direction to control the elastic force of the disc spring 5, thereby limiting the vibration amplitude and frequency of the oscillator to a certain degree, and further realizing good drilling pressure and well drilling efficiency of a drill bit.

The threaded connection of the lower end of the second cylinder 21 in the embodiment has the lower joint 3, the first valve plate 24 is embedded in the bottom of the second cylinder 21 through a bearing, the second valve plate 25 is clamped in the lower joint 3, a sealing structure 6 for preventing leakage is arranged between the second valve plate 25 and the lower joint 3, and the first valve plate 24 and the second valve plate 25 rub against each other for a long time, so that the valve belongs to a wearing part, the flow of drilling fluid can be influenced by the sealing effect between the two valve plates, and the states of the first valve plate 24 and the second valve plate 25 can be conveniently dismounted, mounted and checked through the structure.

Stator 23 in this embodiment is wave stock structure, and the inner wall side of rotor 22 is the curved surface of phase adaptation in rotating the process with stator 23, and is specific, and rotor 22 can be the shape of a trough of two crest cooperations, and the interval between trough and the crest can influence the vibration frequency of oscillator to a certain extent.

The liquid passing holes 251 in the embodiment are uniformly distributed at intervals in a ring shape around the center of the first valve plate 24, and the circumferential hole spacing between the liquid passing holes 251 is one liquid passing hole 251, and in particular, the structure enables the liquid passing holes 251 between the first valve plate 24 and the second valve plate 25 to be periodically switched between closed states without gaps, and the invalid contact time generated in the angular rotation switching process is sufficiently reduced.

The spring assembly 11 in this embodiment is composed of a plurality of extension springs 112 and fixing rings 111 fixedly connected with both ends of the extension springs, and specifically, the structure of the spring assembly 11 is fatigue-resistant and has a longer service life in a long-time well drilling process.

In this embodiment, the lower end of the central tube 14 is connected with the baffle ring 7 in a threaded manner to abut against the supporting and fixing ring 111, specifically, when the mounting is performed, the baffle ring 7 is first placed into the first cylinder 12, and finally, the central tube 14 is placed and then rotated to be sleeved.

In this embodiment, the sealing structure 6 is arranged at the connection position of the first cylinder 12 and the second cylinder 21, the sealing structure 6 is arranged at the connection position of the first cylinder 12 and the fixed sleeve 13, specifically, the oscillator is connected by multiple sections, and the effective sealing structure 6 is arranged to prevent the leakage of the drilling fluid from affecting the vibration pressure.

The working principle is as follows: during horizontal drilling, a central tube 14 of the hydraulic oscillator is in threaded connection with a drill string, a lower joint 3 is in threaded connection with a drill bit, when drilling fluid passes through an inner flow passage of the central tube 14, the drilling fluid flows into a cavity between a first cylinder 12 and a second cylinder 21, then the drilling fluid drives a rotor 22 to rotate in a stator 23 and reciprocate in the radial direction, so that kinetic energy of the drilling fluid is converted into rotating mechanical energy, the rotating and radial reciprocating motion of the rotor 22 drives a first valve plate 24 to rotate and reciprocate in the radial direction, so that the overlapping area of liquid passing holes 251 between the first valve plate 24 and a second valve plate 25 is periodically changed, namely the flow rate of the drilling fluid between the two valve plates is periodically changed, and the upstream liquid flow pressure of the first valve plate 24 is periodically changed. The periodic change of the upstream liquid flow pressure is transmitted to the spring group 11, so that the spring group 11 stretches and retracts periodically, the spring group 11 drives the first cylinder 12 to vibrate periodically, the frictional resistance between a drill string and a well wall is effectively improved, the drilling speed is increased, the jet flow of a drill bit also changes periodically, and the rock breaking efficiency is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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

1. A hydraulic oscillator for well drilling, comprising a vibration assembly (1) and a hydraulic drive assembly (2), characterized in that: the vibration component (1) is composed of a first barrel (12), a spring group (11), a central tube (14) and a fixed sleeve (13), the fixed sleeve (13) is screwed into the first barrel (12) for fixation, two ends of the spring group (11) are respectively abutted against one end of the central tube (14) and the lower end of the fixed sleeve (13), a disc spring (5) is sleeved in the central tube (14), the tail end of the central tube is in threaded connection with an adjusting nut (4), and the disc spring (5) is pressed on the surface of the fixed sleeve (13) through the adjusting nut (4);

the hydraulic drive assembly (2) comprises a second cylinder (21), a stator (23), a rotor (22), a first valve plate (24) and a second valve plate (25), the first cylinder (12) is connected with the second cylinder (21) through threads, the stator (23) is fixed inside the second cylinder (21), and the rotor (22) rotates in the stator (23) in a wall-attached manner;

the first valve plate (24) and the second valve plate (25) are provided with a plurality of liquid passing holes (251), the two valve plates are vertically arranged in a clinging mode, the end face of the first valve plate (24) is fixedly connected with the rotor (22), and the rotor (22) rotates to enable the liquid passing holes (251) between the two valve plates to be periodically unblocked.

2. The hydraulic oscillator for drilling well according to claim 1, characterized in that: the lower end of the second cylinder (21) is in threaded connection with a lower connector (3), the first valve plate (24) is embedded in the bottom of the second cylinder (21) through a bearing, and the second valve plate (25) is clamped in the lower connector (3).

3. The hydraulic oscillator for drilling well according to claim 2, characterized in that: and a sealing structure (6) for preventing leakage is arranged between the second valve plate (25) and the lower joint (3).

4. The hydraulic oscillator for drilling well according to claim 1, characterized in that: the stator (23) is of a wave-shaped long rod structure, and the inner wall side of the rotor (22) is a curved surface matched with the stator (23) in the rotating process.

5. The hydraulic oscillator for drilling well according to claim 1, characterized in that: the liquid passing holes (251) are distributed around the center of the first valve plate (24) at intervals in an annular mode, and the circumferential hole distance between the liquid passing holes (251) is one liquid passing hole (251).

6. The hydraulic oscillator for drilling well according to claim 1, characterized in that: the spring group (11) is composed of a plurality of extension springs (112) and fixing rings (111) fixedly connected with the two ends of the extension springs.

7. The hydraulic oscillator for drilling well according to claim 6, wherein: the lower end of the central tube (14) is in threaded connection with a baffle ring (7) to support the fixing ring (111) in an abutting mode.

8. The hydraulic oscillator for drilling well according to claim 1, characterized in that: the sealing structure is characterized in that a sealing structure (6) is arranged at the joint of the first cylinder (12) and the second cylinder (21), and the sealing structure (6) is arranged at the close joint of the first cylinder (12) and the fixed sleeve (13).