CN213654783U - Dry type flexible short joint - Google Patents

Abstract

The application relates to a dry-type flexible short section, which comprises a flexible component, a first connecting component and a second connecting component, wherein the first connecting component and the second connecting component are connected to two ends of the flexible component; the flexible assembly comprises a flexible hose, a spherical tile, a spherical sleeve and a joint; the inner wall of one end of the spherical tile is a first concave spherical surface, the inner wall of the first concave spherical surface is attached to the outer wall of the first convex spherical surface, and two ends of the flexible assembly can swing relatively; the joints are respectively connected with the outer ends of the spherical tile and the spherical sleeve; two ends of the flexible hose are respectively fixed on the two joints. Through the sphere laminating between spherical tile and the spherical cover, the joint structure of human body is similar, replaces current fish scale structure. The flexible hose capable of bearing high temperature and high pressure is arranged inside the dry-type flexible short section in a penetrating mode, oil-filled structures such as a balance cylinder or a leather bag of the existing flexible short section are replaced, a complex oil-filled process is omitted, maintenance is easy, production efficiency is improved, swinging of two ends of an instrument is completed, the flexible hose capable of bearing high pressure is arranged inside the dry-type flexible short section in a penetrating mode, and the whole structure is guaranteed to have certain toughness.

Description

Dry type flexible short joint

Technical Field

The application relates to mechanical hydraulic transmission control industry field, in particular to a dry type flexible short section.

Background

The flexible short section is connected in series in the instrument string when the instrument string of the petroleum well logging system is used for logging underground, particularly measuring a horizontal well, and is used for reducing the lateral load of the well wall or a drill rod on the instrument string. According to actual conditions, the instrument string can flexibly swing during underground operation by adjusting the position or the number of the flexible short sections, so that huge impact caused by the fact that the instrument string is in a well and meets the extreme conditions of blockage, sudden change of well diameter and the like is buffered, and the well logging instrument is prevented from being damaged.

When horizontal well logging is carried out, the flexible short section can be used at different positions of the instrument string to center or eccentric the instrument. Because the instrument string can not be bent, and after the flexible short section is connected in series, the instrument string can be freely bent by a certain angle, so that the instrument string can be naturally bent, and the instrument can be prevented from being bent and damaged when a well with a smaller build slope is pushed.

The flexible nipple joint of general use when carrying out oil logging in China is because will produce certain bending angle, and will bear the static pressure of several kilometers deep wells (generally use 20000Psi as the index), so inside threading pipe material selection is very critical, cross soft hardly bear huge external pressure, it is difficult freely bending again to cross hard, the loss function needs, so all add balanced structure (balanced piston or leather bag) under the general condition and realize inside and outside pressure balance, avoid inside threading pipe to bear huge absolute pressure, thereby select soft material as the line pipe of walking, in order to produce good flexible bending. But the balanced structure of balanced piston or leather bag needs frequent maintenance, still need the oil drain during dismantlement, and the step is loaded down with trivial details, and work efficiency is low.

Disclosure of Invention

In view of this, the application provides a dry-type flexible nipple joint for concatenating in instrument cluster of going into the well, including flexible assembly and connect first coupling assembling and the second coupling assembling at its both ends, flexible assembly includes flexible hose, spherical tile, spherical cover and joint, the inside both ends intercommunication of spherical tile, just the spherical tile is close to the one end of second coupling assembling is first protruding spherical surface, the whole tube-shape that is of spherical cover, one end inner wall is first concave spherical surface, first concave spherical surface inner wall with first protruding spherical surface outer wall laminates mutually, so that the flexible assembly both ends can swing relatively, the joint is connected respectively spherical tile the outer end of spherical cover, flexible hose runs through spherical tile spherical cover, both ends are fixed respectively on two the joint.

In a possible implementation manner, the joint comprises a first spherical joint and a second spherical joint, the first spherical joint is hollow, part of the first spherical joint is sleeved and fixed on the spherical tile, the end face of the first spherical joint is attached to the end face of the spherical sleeve, the outer wall of the second spherical joint is matched with the inner wall of one end of the spherical sleeve, which is not provided with the first concave spherical surface, and a preset interval is formed between the second spherical joint and the spherical tile.

In a possible implementation manner, an inner wall of one side of the first spherical joint, which is adjacent to the second connecting assembly, is a second concave spherical surface, and a position where the outer wall of the spherical sleeve and the second concave spherical surface are attached to each other is a second convex spherical surface, so as to swing together with the spherical tile and the spherical sleeve.

In a possible implementation manner, the joint further comprises a hose upper joint and a hose lower joint, the hose upper joint is detachably connected with the first spherical joint, the other end of the hose upper joint is connected with the first connecting component, the hose lower joint is detachably connected with the outer end of the first spherical joint, and the other end of the hose lower joint is connected with the second connecting component.

In a possible implementation manner, pressure-bearing plug-in units are installed at the outer ends of the upper hose connector and the lower hose connector, and welding cups are arranged on the pressure-bearing plug-in units.

In a possible implementation manner, a metal wire penetrates through the flexible hose, and two ends of the metal wire are welded on the welding cup.

In a possible implementation manner, a through hole is formed in the side wall of the first spherical joint, and a silicone grease injection plug is installed on the through hole.

In a possible implementation manner, a sealing groove is arranged on the outer wall of the first convex spherical surface, and a sealing ring matched with the sealing groove is arranged in the sealing groove.

In a possible implementation mode, spherical joint one with spherical tile passes through the joint connecting key and links to each other, and installs porose circlip for the junction outward, spherical joint two with spherical cover passes through the joint adapter sleeve and links to each other, spherical joint one with flexible hose joint is fixed, spherical joint two with flexible hose spiro union is fixed, first coupling assembling includes connecting piece and helmet, second coupling assembling includes connecting piece and end cap down, the hose top connection reaches the hose bottom connection outer end all is equipped with the screw ring, go up the connecting piece with hose top connection spiro union, down the connecting piece with hose bottom connection spiro union.

The utility model has the advantages that: through the sphere laminating between spherical tile and the spherical cover, be similar to human joint structure, replace current fish scale structure. Through the application that can bear high temperature, high pressure flexible hose, oil charge structures such as the balance cylinder or the leather bag that have replaced current flexible nipple joint have saved loaded down with trivial details oil charge process, and easy to maintain maintains has still improved production efficiency, has certain toughness at flexible hose again, and the instrument both ends swing is accomplished to the flexible bending.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

Figure 1 shows a cross-sectional view of a dry flexible sub according to an embodiment of the present application;

FIG. 2 illustrates a cross-sectional view of a flexible component according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.

Figure 1 shows a cross-sectional view of a dry flexible sub according to an embodiment of the present application; fig. 2 shows a cross-sectional view of a flexible component 3 according to an embodiment of the present application.

As shown in fig. 1 and 2, the dry flexible short joint is configured to be connected in series in a downhole tool string, and includes: flexible assembly 3 and connect first coupling assembling and the second coupling assembling at its both ends, flexible assembly 3 includes flexible hose 29, spherical tile 15, spherical cover 19 and joint, the inside both ends intercommunication of spherical tile 15, and the one end that spherical tile 15 is close to the second coupling assembling is first protruding sphere, spherical cover 19 is whole to be the tube-shape, one end inner wall is first concave sphere, first concave sphere inner wall is laminated with first protruding sphere outer wall mutually, so that 3 both ends of flexible assembly can swing relatively, the joint is connected respectively at spherical tile 15, the outer end of spherical cover 19, flexible hose 29 runs through spherical tile 15, spherical cover 19, both ends are fixed respectively on two joints.

In this embodiment, the flexible nipple joint of dry-type of this application, through the sphere laminating between spherical tile 15 and the spherical cover 19, is similar to human joint structure, replaces current fish scale structure. Through can bear the high temperature, the application of high pressure flexible hose, the oil charge structures such as the balance cylinder or the leather bag of having replaced current flexible nipple joint, the loaded down with trivial details oil charge process has been saved, easy to maintain maintains the maintenance, the production efficiency is improved, have certain toughness at flexible hose 29 again, the flexible, accomplish the swing of instrument both ends, ensure that overall structure has certain toughness, it is still to need particular emphasis, this dry-type flexible nipple joint is greater than 10 degrees at the angle of predetermineeing of space optional position, in order to ensure that dry-type flexible nipple joint has reasonable swing range.

As shown in fig. 2, in one embodiment, the joint includes a first ball joint 14 and a second ball joint 23, the first ball joint 14 is hollow, a portion of the first ball joint 14 is sleeved and fixed on the ball tile 15, the first ball joint 14 is attached to an end surface of the ball sleeve 19, an outer wall of the second ball joint 23 is matched with an inner wall of the ball sleeve 19 at an end not provided with the first concave spherical surface, and a predetermined interval is provided between the second ball joint 23 and the ball tile 15.

In one embodiment, the inner wall of the first ball joint 14 adjacent to the second connecting component is a second concave spherical surface, and the joint position of the outer wall of the ball sleeve 19 and the second concave spherical surface is a second convex spherical surface for swinging together with the ball shoe 15 and the ball sleeve 19.

In this embodiment, the risk that the leather bag breaks or the piston blocks and causes the instrument to damage has been saved to this kind of flexible mechanism, has improved the reliability of instrument, prolongs its life, and this flexible nipple joint of dry-type is owing to saved loaded down with trivial details structure, and the part is less relatively, and instrument length is short itself, has saved more spaces, and the design is also more reasonable, and overall weight is light, can be applicable to more use scenes.

In one embodiment, the joint further comprises a hose upper joint 10 and a hose lower joint 27, wherein the hose upper joint 10 is detachably connected with the first spherical joint 14, the other end of the hose upper joint is connected with the first connecting component, the hose lower joint 27 is detachably connected with the outer end of the second spherical joint 23, and the other end of the hose lower joint is connected with the second connecting component.

In one embodiment, the angles of the spherical surfaces of the first concave spherical surface and the second concave spherical surface are consistent.

In one embodiment, as shown in fig. 2, the outer ends of the upper hose connector 10 and the lower hose connector 27 are respectively provided with a pressure-bearing insert 7, which is fixed by an insert clamping ring 6, and the pressure-bearing insert 7 is provided with a welding cup for fixing a metal wire.

In this embodiment, the use of the pressure-bearing insert 7 and the flexible hose 29 reduces the production cost, facilitates assembly, disassembly and maintenance, and is an environmentally friendly product without environmental pollution. The pressure-bearing plug-in 7 can also avoid the instrument to be flooded with water and clyster after the upper connecting piece 2 or the lower connecting piece 4 of the instrument fails in sealing, thereby effectively protecting the instrument.

In one embodiment, a wire is threaded through the flexible hose 29 and both ends of the wire are welded to the solder cups.

In this embodiment, the material of flexible hose 29 adopts the material of peek, and self can bear 20000 psi's external pressure, and the certain angle of free bending is not broken in the space, has effectively prolonged the life of the flexible nipple joint of dry-type of this application, and the pressure-bearing plug-in components 7 at both ends are communicated to middle threading, need not increase balanced structure for the instrument and prevent that the instrument from receiving external pressure and the hose breaks and intaking in deep well department, avoids circuit, circuit components and parts damage and burns up whole instrument cluster.

In one embodiment, as shown in fig. 2, a through hole is formed in the sidewall of the first ball joint 14, and a silicone grease injection plug 30 is installed in the through hole.

In one embodiment, the outer wall of the first convex spherical surface is provided with a sealing groove, and a sealing ring 18 matched with the sealing groove is arranged in the sealing groove.

In one embodiment, the first spherical joint 14 is connected with the spherical tile 15 through an articulated joint 17, a hole elastic retainer ring 16 is arranged outside the joint, the second spherical joint 23 is connected with the spherical sleeve 19 through an articulated joint sleeve 20, the first spherical joint 14 is fixedly clamped with the flexible hose 29, the second spherical joint 23 is fixedly screwed with the flexible hose 29, the first connecting assembly comprises an upper connecting piece 2 and a protective cap 1, the second connecting assembly comprises a lower connecting piece 4 and a plug 5, the outer ends of the upper hose joint 10 and the lower hose joint 27 are respectively sleeved with a threaded ring 11, the upper connecting piece 2 is screwed with the upper hose joint 10, and the lower connecting piece 4 is screwed with the lower hose joint 27.

In this embodiment, the protective cap 1 and the plug 5 can effectively prevent the instrument from being affected with damp, and the instrument is taken into water, entered into ash and conveniently carried, and the protective cap 1, the upper connecting piece 2, the plug 5 and the lower connecting piece 4 are all in the prior art, and since the protective cap 1, the upper connecting piece 2, the plug 5 and the lower connecting piece 4 only have the functions of connecting at two ends and sealing in the application, except that the two ends of the flexible assembly 3 are adaptively changed, the structure of the flexible assembly is matched, and other changes are not made, so that the detailed description is omitted herein.

The utility model provides a flexible nipple joint of dry-type refers to fig. 1 and fig. 2, the utility model discloses the assembling process is:

1. the sealing ring 18 is sleeved in the sealing groove of the spherical surface of the spherical tile 15.

2. The spherical tile 15 sleeved with the sealing ring is sleeved in the spherical sleeve 19.

3. The first ball joint 14 is sleeved in the ball tile 15 and connected by an articulation key 17, and then an elastic collar 16 for an upper hole is arranged to prevent the articulation key 17 from falling out.

4. The second spherical joint 23 is sleeved in the second spherical sleeve 19 and connected by the joint connecting sleeve 20, and the joint connecting sleeve 20 is fixed on the second spherical joint 23 by the screw 21 and the elastic washer 22.

5. And the positioning key 12 and the threaded ring 11 are arranged in corresponding grooves of the second spherical joint 23.

6. And sleeving the sealing ring 13 into a corresponding sealing groove of the second spherical joint 23.

7. A common through-thread is inserted into the inner hole of the flexible hose 29.

8. The upper half ring clamp 31 is sleeved in a corresponding groove at the upper end of the flexible hose 29 and is fixed by a steel wire clamp ring 32.

9. And (4) inserting the hose assembly assembled in the steps 7 and 8 into the inner hole of the assembly assembled in the steps 1, 2, 3, 4, 5 and 6.

10. And the lower half-ring clamp 24 is sleeved in a corresponding groove at the lower end of the flexible hose 29 and is fixed on the right end surface of the second spherical joint 23 by screws.

11. The sealing ring 28 is sleeved in an inner hole groove at the left end of the lower hose connector 27, and the sealing ring 26 is sleeved in an excircle sealing groove corresponding to the lower hose connector 27.

12. The assembly assembled in step 11 is inserted into the right end head of the flexible hose 29 and screwed on the right end of the second spherical joint 23 by the fixing ring 25.

13. The positioning key 12 and the threaded ring 11 are arranged in corresponding grooves of the hose upper joint 10, and the sealing ring 9, the sealing ring 13 and the sealing ring 28 are respectively arranged in an outer circular groove and an inner hole groove of the hose upper joint 10.

14. And (3) connecting the assembled assembly obtained in the step (13) with a first ball joint (14) through a threaded ring (11).

15. And a penetrating wire is welded in a welding cup corresponding to the pressure-bearing insert 7 at the left end of the hose upper joint 10, and is fixed by an insert pressing ring 6 after being arranged at a correct position.

16. And welding the through wire in a welding cup corresponding to the pressure-bearing insert 7 at the right end of the lower hose joint 27, and fixing the through wire by using an insert pressing ring 6 after the through wire is arranged at a correct position, so that the flexible assembly 3 is completely assembled.

17. The upper connecting piece 1 is fixed on the upper end of the flexible component 3 through a connecting sleeve and a screw.

18. The lower connector 4 is attached to the lower end of the flexible member 3 by means of a threaded ring 11.

19. The upper end of the upper connecting piece 1 and the lower end of the lower connecting piece 4 are respectively screwed with the protective cap 1 and the plug 5.

20. And filling silicone grease into the instrument, screwing the silicone grease filling plug 30, and finishing assembly.

It should be noted that the individual connecting elements or fixing elements are only provided in the assembly description, and since they only use the normal connection relationship, it is clear to those skilled in the art that they can be obtained from the assembly description, fig. 1 and fig. 2, and therefore they are not described herein in detail.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A dry-type flexible short section is used for being connected in series in a downhole instrument string and is characterized by comprising a flexible assembly, a first connecting assembly and a second connecting assembly, wherein the first connecting assembly and the second connecting assembly are connected to two ends of the flexible assembly;

the flexible assembly comprises a flexible hose, a spherical tile, a spherical sleeve and a joint;

two ends of the interior of the spherical tile are communicated, and one end, adjacent to the second connecting assembly, of the spherical tile is a first convex spherical surface;

the whole spherical sleeve is cylindrical, the inner wall of one end of the spherical sleeve is a first concave spherical surface, and the inner wall of the first concave spherical surface is attached to the outer wall of the first convex spherical surface, so that the two ends of the flexible assembly can swing relatively;

the joints are respectively connected to the outer ends of the spherical tile and the spherical sleeve;

the flexible hose penetrates through the spherical tile and the spherical sleeve, and two ends of the flexible hose are respectively fixed on the two connectors.

2. The dry flexible sub of claim 1, in which the joints comprise a first ball joint and a second ball joint;

the first spherical joint is hollow, part of the first spherical joint is sleeved and fixed on the spherical tile, and the first spherical joint is attached to the end face of the spherical sleeve;

the outer wall of the second spherical joint is matched with the inner wall of one end, which is not provided with the first concave spherical surface, of the spherical sleeve, and a preset interval is arranged between the second spherical joint and the spherical tile.

3. The dry flexible sub according to claim 2, wherein a side inner wall of the ball joint adjacent to the second connection assembly is a second concave spherical surface, and a position where the outer wall of the ball sleeve is attached to the second concave spherical surface is a second convex spherical surface for swinging together with the ball shoe and the ball sleeve.

4. The dry flexible sub of claim 2, wherein the joint further comprises a hose upper joint and a hose lower joint;

the upper joint of the hose is detachably connected with the first spherical joint, and the other end of the hose is connected with the first connecting component;

the hose lower joint and the two outer ends of the spherical joint are detachably connected, and the other end of the hose lower joint is connected with the second connecting assembly.

5. The dry-type flexible short section according to claim 4, characterized in that the outer ends of the upper hose joint and the lower hose joint are provided with pressure-bearing inserts, and the pressure-bearing inserts are provided with welding cups.

6. The dry-type flexible short section according to claim 5, wherein a metal wire is arranged in the flexible hose in a penetrating manner, and both ends of the metal wire are welded on the welding cups of the pressure-bearing insert.

7. The dry-type flexible short section according to claim 2, characterized in that a through hole is arranged on the side wall of the first ball joint, and a silicone grease injection plug is arranged on the through hole.

8. The dry-type flexible short section according to claim 1, characterized in that the outer wall of the first convex spherical surface is provided with a sealing groove, and a sealing ring matched with the sealing groove is arranged in the sealing groove.

9. The dry flexible sub of claim 4, in which the first connection assembly comprises an upper connector and a cap, and the second connection assembly comprises a lower connector and a plug;

the hose upper joint reaches the hose lower clutch outer end all overlaps and is equipped with the screw thread ring, go up the connecting piece with the hose upper joint spiro union, down the connecting piece with the hose lower clutch spiro union.

10. The dry flexible sub according to claim 2, wherein the ball joint I is connected with the ball tile through an articulation key, and a circlip for holes is arranged outside the connection;

the second spherical joint is connected with the spherical sleeve through a joint connecting sleeve;

the first spherical joint is fixedly clamped with the flexible hose, and the second spherical joint is fixedly connected with the flexible hose in a threaded manner.

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