CN215927320U - Oil pipe butt joint packer - Google Patents

Abstract

The application provides an oil pipe butt joint packer relates to oil recovery technical field. The oil pipe butt joint packer comprises an oil pipe joint and a packer body; the oil pipe joint comprises a first end and a second end which are opposite and are respectively used for connecting an upper butt joint oil pipe and the packer body; the packer body includes: the mandrel comprises a first end and a second end which are opposite, and two bosses which are distributed along the circumferential direction and extend along the axial direction are arranged at the position, close to the first end, of the outer circumferential surface of the mandrel and are used for pressing and holding the upper end surface of the lower butt joint oil pipe; a long press cap connected to the first end of the mandrel; a guide shoe connected to the second end of the mandrel; the outside of the mandrel is sequentially sleeved with a pressing cylinder, an opening pressing sleeve, a spacer bush, an upper auxiliary rubber cylinder, an upper spacer ring, a sealing rubber cylinder, a lower spacer ring and a lower auxiliary rubber cylinder from the long pressing cap to the guide shoe.

Description

Oil pipe butt joint packer

Technical Field

The application relates to the technical field of oil exploitation, in particular to an oil pipe butt joint packer.

Background

In the process of horizontal well bare seal segmented transformation, the failure of a suspended packer sometimes occurs, so that the yield increasing operation cannot be normally carried out, the failed suspended packer needs to be milled and salvaged, when the failed suspended packer is disposed, the suspended packer needs to be put in again, and at present, the suspended packer is mostly adopted to connect an oil pipe, and a sleeve is directly butted with the oil pipe needing to be butted; when the subsequent production increasing operation is continued, the butt joint is not sealed, and the annular space for suspending the technical casing at the lower part of the packer needs to bear high pressure communicated with an oil pipe, so that the technical casing is easily damaged.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a packer for oil pipe butt joint, so that the sealing of the butt joint is realized when the oil pipes are in butt joint, and the technical casing does not need to bear high pressure communicated with the oil pipes.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

the application provides an oil pipe butt joint packer, this oil pipe butt joint packer includes: the packer comprises an oil pipe joint and a packer body; the oil pipe joint comprises a first end and a second end which are opposite and are respectively used for connecting an upper butt joint oil pipe and the packer body; the packer body includes: the mandrel comprises a first end and a second end which are opposite, and two bosses which are distributed along the circumferential direction and extend along the axial direction are arranged at the position, close to the first end, of the outer circumferential surface of the mandrel and are used for pressing and holding the upper end surface of the lower butt joint oil pipe; a long press cap connected to the first end of the mandrel; a guide shoe connected to the second end of the mandrel; a pressing cylinder, an opening pressing sleeve, a spacer bush, an upper auxiliary rubber cylinder, an upper spacer ring, a sealing rubber cylinder, a lower spacer ring and a lower auxiliary rubber cylinder are sequentially sleeved outside the mandrel from the long pressing cap to the guide shoe; wherein, press the upper end of a section of thick bamboo to be connected the oil pipe connects the second end, the lower terminal surface of long pressure cap press hold in press the internal diameter reducing area of a section of thick bamboo, press the lower extreme of a section of thick bamboo through the shear pin with dabber axial fixity, the opening press the upper end of cover have with boss complex open slot, so that the opening press the cover to run through boss and its up end top hold in press the lower terminal surface of a section of thick bamboo, just the opening press the up end of cover with the interval preset distance between the up end of boss.

In some variations of the present application, the tubing joint comprises: the opposite two ends of the coupling are respectively provided with internal threads which are respectively used for connecting the upper butt joint oil pipe and the variable buckle nipple; and the opposite two ends of the variable buckle nipple are respectively provided with internal threads which are respectively used for connecting the coupling and the pressing barrel of the packer body.

In some variations of the present application, the inner surfaces of the press cylinders each have toothed slip teeth; the packer body further includes: and the locking slip is fixed in a positioning groove of the inner hole of the long pressing cap and is provided with a sawtooth thread, and the locking slip is used for being matched with the toothed slip teeth of the pressing cylinder so as to limit the long pressing cap to slide towards the direction far away from the second end of the mandrel.

In some variations of the present application, the inner bore of the platen has at least one ring of sealing grooves for receiving a sealing ring to effect a seal with the mandrel.

In some modified embodiments of the present application, the pressing cylinder has 6 threaded holes distributed along its circumference for connecting 6 shear pins to achieve axial fixation with the mandrel.

In some modified embodiments of the present application, the inner bore upper end of the long pressing cap has a tapered bore section, and the inner diameter of the tapered bore section is gradually reduced from the upper end to the lower end; wherein the taper of the taper hole section is 15 degrees.

In some variations of the present application, the spacer comprises a first spacer and a second spacer of unequal axial lengths; or the spacer comprises a first spacer and a second spacer which are equal in axial length.

In some modified embodiments of the present application, the upper auxiliary packing element and one side of the lower auxiliary packing element deviating from each other are respectively provided with an expandable metal packing bowl, and the upper and lower opening surfaces of the expandable metal packing bowl are respectively attached to the upper auxiliary packing element and the bevel surface of the lower auxiliary packing element.

In some variations of the present application, the lower end of the outer periphery of the guide shoe has a tapered section with an inner diameter that decreases from the upper end to the lower end; wherein, the taper of the conical surface section is 15 degrees.

In some variations of the present application, the mandrel has a length of 1.5-2 m.

Compared with the prior art, the oil pipe butt joint packer provided by the application is connected to the bottom of an upper butt joint oil pipe, after being inserted into a lower butt joint oil pipe 3 to be butted in a well, the upper butt joint oil pipe is pressed down through the support at the top end of the lower butt joint oil pipe, the oil pipe butt joint packer can perform reliable setting, reliable sealing can be formed at the butt joint of the oil pipe, and further the condition that a technical casing is damaged due to the fact that the butt joint is not sealed is effectively avoided; and when the oil pipe butt joint packer is operated, the upper butt joint oil pipe is pressed down to a specified pressure value, the oil pipe butt joint packer can start setting without additional operation, the operation mode is simple and reliable, the structure is simple, the processing difficulty is low, and the tool cost can be reduced.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is a schematic diagram illustrating a tubing butt packer according to an embodiment of the present invention;

FIG. 2 schematically illustrates a structural schematic diagram of a tubing butt packer setting with a lower butt tubing set according to an embodiment of the present invention;

FIG. 3 schematically illustrates a semi-sectional view of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 4 schematically illustrates a partial half-section of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 5 schematically illustrates another partial half-section of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 6 schematically illustrates a half-section view of a tubing joint of a tubing butt packer according to an embodiment of the present invention;

FIG. 7 schematically illustrates a schematic top view of a mandrel of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 8 schematically shows a schematic main body structure view of a mandrel of a packer body of a tubing butt packer according to an embodiment of the present invention at a first angle;

FIG. 9 schematically shows a schematic main structural view of a mandrel of a packer body of a tubing butt packer according to an embodiment of the present invention at a second angle;

FIG. 10 schematically illustrates a cross-sectional view of a mandrel of a packer body of a tubing butt packer according to an embodiment of the present invention at a second angle;

FIG. 11 is a schematic diagram showing a top view of a long gland of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 12 is a schematic cross-sectional view taken along line A-A of FIG. 11;

FIG. 13 schematically illustrates a schematic top view of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 14 is a schematic cross-sectional view taken along line A-A of FIG. 13;

FIG. 15 schematically illustrates a top view of a schematic open-ended packing of a packer body of a tubing butt packer in accordance with an embodiment of the present invention;

FIG. 16 is a schematic diagram showing the main structure of an opening pressing sleeve of a packer body of a tubing butt packer according to an embodiment of the utility model;

FIG. 17 is a cross-sectional view of section B-B of FIG. 16;

FIG. 18 schematically illustrates a schematic top view of an inflatable metal packing bowl of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 19 is a cross-sectional view of section A-A of FIG. 18;

FIG. 20 is a schematic diagram showing a top view of a guide shoe of a packer body of a tubing butt packer according to an embodiment of the present invention;

FIG. 21 is a cross-sectional view of section A-A of FIG. 20;

FIG. 22 schematically illustrates a top view of the locking slips of the packer body of the tubing butt packer according to an embodiment of the present invention;

FIG. 23 is a cross-sectional view of section A-A of FIG. 22;

fig. 24 is a partially enlarged view of the portion a in fig. 23.

The reference numbers illustrate:

the packer comprises a packer body 1, a mandrel 11, a boss 1101, a long pressing cap 12, a positioning groove 1201, a guide shoe 13, a pressing cylinder 14, a sealing groove 1401, a threaded hole 1402, a toothed slip tooth 1403, an opening pressing sleeve 15, an open slot 1501, a spacer 16, a first spacer 161, a second spacer 162, an upper auxiliary rubber cylinder 17, an upper spacer ring 18, a sealing rubber cylinder 19, a lower spacer ring 110, a lower auxiliary rubber cylinder 111, a shearing pin 112, a locking slip 113, a sealing ring 114, an expandable metal cup 115, a tubing joint 2, a coupling 21, a change-over nipple 22 and a lower butt joint tubing 3.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In the prior art, a suspension packer is mostly adopted to connect an oil pipe, and a sleeve is directly butted with the oil pipe to be butted; when the subsequent production increasing operation is continued, the butt joint is not sealed, and the annular space for suspending the technical casing below the packer needs to bear high pressure communicated with an oil pipe, so that the technical casing is easily damaged.

Example one

Referring to fig. 1-21, a tubing butt packer according to one embodiment of the present invention comprises: the packer comprises an oil pipe joint 2 and a packer body 1; the oil pipe joint 2 comprises a first end and a second end which are opposite to each other and are respectively used for connecting an upper butt joint oil pipe and the packer body 1; the packer body 1 includes: the mandrel 11 comprises a first end and a second end which are opposite, and two bosses 1101 which are distributed along the circumferential direction and extend along the axial direction are arranged at the position, close to the first end, of the outer circumferential surface of the mandrel 11, and are used for pressing and holding the upper end surface of the lower butt joint oil pipe 3; a long press cap 12 connected to the first end of the mandrel 11; a guide shoe 13 connected to the second end of the mandrel 11; a pressing cylinder 14, an opening pressing sleeve 15, a spacer 16, an upper auxiliary rubber cylinder 17, an upper spacer ring 18, a sealing rubber cylinder 19, a lower spacer ring 110 and a lower auxiliary rubber cylinder 111 are sequentially sleeved outside the mandrel 11 from the long pressing cap 12 to the guide shoe 13; the upper end of the pressing barrel 14 is connected with the second end of the oil pipe joint 2, the lower end face of the long pressing cap 12 is pressed and held in the inner diameter reducing area of the pressing barrel 14, the lower end of the pressing barrel 14 is axially fixed with the mandrel 11 through the shearing pin 112, the upper end of the opening pressing sleeve 15 is provided with an open slot 1501 matched with the boss 1101, so that the opening pressing sleeve 15 penetrates through the boss 1101 and the upper end face of the opening pressing sleeve is pressed and held on the lower end face of the pressing barrel 14, and the upper end face of the opening pressing sleeve 15 and the upper end face of the boss 1101 are spaced at a preset distance.

Specifically, for solving the above-mentioned technical problem that the technique sleeve pipe that leads to easily damages because oil pipe butt joint department does not seal, the oil pipe butt joint packer that this embodiment provided mainly includes two parts, is respectively: the packer comprises an oil pipe joint 2 and a packer body 1; wherein, the upper end of the oil pipe joint 2 is used for connecting an upper butt joint oil pipe, and the lower end thereof is connected with the packer body 1. Referring to fig. 3-5, the packer body 1 includes a mandrel 11, the upper end of the mandrel 11 has two bosses 1101, specifically two scalloped bosses 1101 (refer to fig. 3) spaced 90 degrees apart and symmetrically distributed about the body of the mandrel 11; the upper end and the lower end of the mandrel 11 are respectively connected with a long pressing cap 12 and a guide shoe 13, and a pressing cylinder 14, an opening pressing sleeve 15, a spacer bush 16, an upper auxiliary rubber cylinder 17, an upper spacer ring 18, a sealing rubber cylinder 19, a lower spacer ring 110 and a lower auxiliary rubber cylinder 111 are sequentially sleeved outside the mandrel 11 from the long pressing cap 12 to the guide shoe 13; wherein, the long pressing cap 12 can be processed by 42CrMo/35CrMo alloy steel material, and the lower end surface of the long pressing cap 12 presses and holds the reducing area of the pressing cylinder 14; the upper end of the pressing cylinder 14 is used for connecting the lower end of the oil pipe joint 2, the lower end of the pressing cylinder 14 is circumferentially fixed with the mandrel 11 through a plurality of shear pins 112, specifically, 6 threaded holes 1402 can be uniformly arranged at the lower end of the pressing cylinder 14 along the axial direction for installing the 6 shear pins 112 to realize the fixation with the mandrel 11, but the number of the threaded holes 1402 and the shear pins 112 is not limited to this; the upper end of the opening pressing sleeve 15 is provided with an opening groove 1501 matched with the boss 1101, so that the upper end of the opening pressing sleeve 15 penetrates through the boss 1101, the upper end face of the opening pressing sleeve is supported against the lower end face of the pressing cylinder 14, and a preset distance is arranged between the upper end face of the opening pressing sleeve 15 and the upper end face of the boss 1101, so that the downward force of the pressing cylinder 14 to press the sleeve downwards can be transmitted through the opening pressing sleeve, the opening pressing sleeve 15 can slide relative to the mandrel 11, the distance between the boss 1101 on the mandrel 11 and the upper end face of the opening pressing sleeve 15 can provide a downward pressing stroke for the pressing cylinder 14 on one hand, and can also limit the downward pressing stroke of the pressing cylinder 14 on the other hand, when the lower end face of the pressing cylinder 14 is supported against the upper end face of the boss 1101 of the mandrel 11, the downward pressing stroke is in place, the sealing rubber cylinder 19 can be prevented from being crushed, and the preset distance can be specifically set according to actual situations, and is not specifically limited herein.

Specifically, in order to save the processing cost, referring to fig. 6, the oil pipe joint 2 may be composed of two parts, which are: the connecting device comprises a coupling 21 and a variable-buckle nipple 22, wherein internal threads are respectively arranged at two opposite ends of the coupling 21 and are respectively used for connecting an upper butt joint oil pipe and the variable-buckle nipple 22; the opposite ends of the fastening change nipple 22 are respectively provided with internal threads for connecting the internal threads at the lower end of the coupling 21 and the internal threads at the upper end of the pressing cylinder 14 of the packer body 1.

Specifically, referring to fig. 3, the length of the mandrel 11 can be set to about 1.5-2m, so that the packer body 1 can be ensured not to be separated from the lower butt joint oil pipe 3 when the pipe column is stretched after being inserted into the lower butt joint oil pipe 3, and the sealing reliability of the butt joint of the oil pipes can be ensured; since the length of the mandrel 11 is longer, the length of the spacer 16 is also longer, and for convenience of processing, the spacer 16 may be divided into two parts, namely a first spacer 161 and a second spacer 162, and the lengths of the first spacer 161 and the second spacer 162 may be equal, or the lengths of the first spacer 161 and the second spacer 162 may also be unequal, which is not specifically limited herein and may be set according to actual conditions.

When setting operation is carried out, connecting the external thread at the lower end of the upper butt joint oil pipe with the internal thread at the upper end of the coupling 21 of the oil pipe joint 2, and tightening according to specified torque; the well-connected tool pipe column is put into the top of the lower butt joint oil pipe 3, the oil pipe butt joint packer is slowly inserted into the lower butt joint oil pipe 3, the diameter-changing position of the packer (the boss 1101 of the mandrel 11) is supported on the top of the lower butt joint oil pipe 3 (the fish top) after the packer is in place, the shearing pin 112 connected with the mandrel 11 of the pressing cylinder 14 is sheared by pressing the upper butt joint oil pipe to the preset weight, the opening pressing sleeve 15 and the spacer sleeve 16 are driven to move downwards while the pressing cylinder 14 moves downwards, so that the upper auxiliary rubber cylinder 17, the upper spacer ring 18, the sealing rubber cylinder 19, the lower spacer ring 110 and the lower auxiliary rubber cylinder 111 are extruded, the sealing rubber cylinder 19 can be attached to the inner wall of the lower butt joint oil pipe 3, the setting operation can be completed, the butt joint position of the oil pipe can be sealed, if the pipe column is anchored by matching with a hydraulic anchor, various subsequent downhole operation measures can be carried out, and the method can be applied to fracturing and acidification of oil and gas wells, The method comprises the following steps of production increasing treatment, well repairing operation, old well reconstruction and other underground operations.

According to the above list, the embodiment of the utility model provides an oil pipe butt joint packer which is connected to the bottom of an upper butt joint oil pipe, and after being put into a well and inserted into a lower butt joint oil pipe 3 to be butted, the upper butt joint oil pipe is pressed down through the support at the top end of the lower butt joint oil pipe, the oil pipe butt joint packer can perform reliable setting, reliable sealing can be formed at the butt joint of the oil pipe, and further the condition that the technical casing is damaged due to the fact that the butt joint is not sealed is effectively avoided; and when the oil pipe butt joint packer is operated, the upper butt joint oil pipe is pressed down to a specified pressure value, the oil pipe butt joint packer can start setting without additional operation, the operation mode is simple and reliable, the structure is simple, the processing difficulty is low, and the tool cost can be reduced.

Further, referring to fig. 4, 12, 14, 22-24, in an embodiment, the inner surface of the press cylinder 14 has tooth-shaped slip elements 1403 respectively; the packer body 1 further comprises: and the locking slips 113 are fixed in the positioning grooves 1201 of the inner hole of the long pressing cap 12 and are provided with sawtooth threads for matching with the toothed slip teeth 1403 of the pressing barrel 14 to limit the long pressing cap 12 to slide in the direction away from the second end of the mandrel 11.

Specifically, when setting is performed, the pressing cylinder 14 moves downwards under pressure, in order to avoid reverse movement of the pressing cylinder and influence on setting reliability, in the technical scheme adopted by the utility model, the inner surface of the pressing cylinder 14 is provided with the toothed slip teeth 1403, correspondingly, the outer surface of the long pressing cap 12 is provided with the assembling groove for installing the locking slip 113, the locking slip 113 is provided with the sawtooth threads which can be matched with the toothed slip of the pressing cylinder 14, and the sawtooth threads of the locking slip 113 are configured to be in the same direction as the toothed slip teeth 1403 of the pressing cylinder 14 and face downwards, so that the pressing cylinder 14 can be limited to move upwards, namely in the direction away from the second end of the mandrel 11.

Specifically, referring to fig. 22-24, the locking slips 113 may be formed from a 65Mn or 60Si2Mn spring steel material; an opening is formed in the side of the locking slip 113, so that the locking slip is prevented from being elastically assembled into an assembly groove of the long pressing cap 12; the climbing angle b of the sawtooth thread of the locking slip 113 can be set to 60 degrees, the locking angle c can be set to-3 degrees, and the toothed slip teeth 1403 of the pressing cylinder 14 are matched with the locking slip teeth, so that the locking slip 113 can be locked on the pressing cylinder 14 more stably and reliably.

Further, referring to fig. 13-14, in an embodiment, the inner bore of the pressing cylinder 14 has at least one ring of sealing grooves 1401 for receiving a sealing ring 114 to seal with the mandrel 11.

Specifically, in order to improve the sealing performance of the connection between the pressure cylinder 14 and the mandrel 11, achieve a fixed sealing connection between the pressure cylinder 14 and the mandrel 11 when the shear pin 112 is not cut off, and ensure a reliable sealing of the abutting position of the oil pipes by a sliding sealing connection between the pressure cylinder 14 and the mandrel 112 after the shear pin 112 is sheared, the utility model adopts a technical scheme that at least one circle of circumferentially surrounding sealing grooves 1401 are arranged in an inner hole of the pressure cylinder 14, specifically referring to fig. 4, 3 circles of mutually spaced sealing grooves are arranged 1401 in the axial direction of the inner hole of the pressure cylinder 14, a sealing ring 114 is arranged in each sealing groove 1401, and specifically, an O-shaped sealing ring 114 is adopted to achieve a reliable sealing between the pressure cylinder 14 and the mandrel 11.

Further, referring to fig. 12, in a specific implementation, the inner hole of the long pressing cap 12 has a taper hole section at the upper end, and the inner diameter of the taper hole section is gradually reduced from the upper end to the lower end; wherein the taper of the taper hole section is 15 degrees.

Specifically, in the technical scheme adopted by the utility model, a section of taper hole section is configured in the inner hole at the upper end of the long pressing cap 12, and the taper of the taper hole section can be set to be 15 degrees, so that the liquid in the oil pipe can flow downwards, and the turbulent flow caused by sudden change can be reduced.

Further, referring to fig. 5 and fig. 18 to fig. 19, in a specific implementation, the sides of the upper auxiliary rubber tube 17 and the lower auxiliary rubber tube 111, which are away from each other, are respectively provided with an expandable metal covering bowl 115, and the opening surfaces of the upper and lower expandable metal covering bowls 115 are respectively attached to the oblique angle surfaces of the upper auxiliary rubber tube 17 and the lower auxiliary rubber tube 111.

Specifically, in order to improve the sealing performance of the sealing rubber tube 1910, in the technical scheme adopted by the utility model, the upper side of the upper auxiliary rubber tube 17 and the lower side of the lower auxiliary rubber tube 111 are respectively provided with the expandable metal packing bowls 115, the expandable metal packing bowls 115 can be made of 10 steel materials, the mouth part of each expandable metal packing bowl has a 60-degree thin edge after 1-1.5mm, the expandable metal packing bowl is attached to the corresponding oblique angle surface of the upper auxiliary rubber tube 17 or the lower auxiliary rubber tube 111 after installation, and the expandable metal packing bowl can be closely attached to the inner wall of the sleeve after being pressed and expanded so as to protect the sealing of the sealing rubber tube 19.

Further, referring to fig. 20 and 21, in an implementation, the lower end of the outer periphery of the guide shoe 13 is provided with a conical surface section, and the inner diameter of the conical surface section is gradually reduced from the upper end to the lower end; wherein, the taper of the conical surface section is 15 degrees.

Specifically, in the technical scheme adopted by the utility model, a conical surface section is arranged at the lower end of the guide shoe 13, the conical degree of the conical surface can refer to an angle a in the attached drawing 21, and the conical degree can be configured to be 15 degrees, so that the packer body 1 can be conveniently guided to be inserted into the lower butt joint oil pipe 3; and the upper end of the inner hole of the guide shoe 13 can be provided with trapezoidal threads for connecting with external threads at the lower end of the mandrel 11.

When the tubing butt joint packer provided by the embodiment is installed, firstly, 3 sealing rings 114 are installed in a sealing groove 1401 in a pressing cylinder 14, then the pressing cylinder 14 is installed from the upper end of a mandrel 11, so that 6 threaded holes 1402 of the pressing cylinder 14 are aligned with corresponding 6 installation holes on the mandrel 11, and 6 shear pins 112 are installed in the corresponding threaded holes 1402 on the pressing cylinder 14 and screwed in place, so that the pressing cylinder 14 and the mandrel 11 are fixed relatively; installing a locking slip 113 into a positioning groove 1201 of an inner hole of the long pressing cap 12, enabling a sawtooth thread opening of the locking slip 113 to face downwards, connecting an internal thread at the lower end of the long pressing cap 12 to an external thread at the upper end of the mandrel 11, clamping the upper part of the long pressing cap 12 and then screwing the long pressing cap according to a specified torque; loading the opening pressing sleeve 15 from the lower end of the mandrel 11, enabling the opening groove 1501 of the opening pressing sleeve 15 to penetrate through the boss 1101 of the mandrel 11, and then pushing the upper end face of the opening pressing sleeve 15 against the lower end face of the pressing cylinder 14; loading the spacer 16 from the lower end of the mandrel 11 so that it contacts the lower end face of the opening pressing sleeve 15; loading 1 inflatable metal-clad bowl 115 from the lower end of the mandrel 11, with the opening facing downward; loading the upper auxiliary rubber cylinder 17 from the lower end of the mandrel 11, wherein the inclined angle surface of the upper auxiliary rubber cylinder is required to be upward so as to ensure that the inclined angle surface of the upper auxiliary rubber cylinder is attached to the opening surface of the expandable metal packing bowl 115; loading the upper spacing ring 18 from the lower end of the mandrel 11, and attaching the upper end face of the upper spacing ring to the lower end face of the upper auxiliary rubber cylinder 17; loading the upper spacing ring 18 from the lower end of the mandrel 11, and attaching the upper end face of the upper spacing ring to the lower end face of the upper auxiliary rubber cylinder 17; a sealing rubber tube 19 is arranged from the lower end of the mandrel 11, and the upper end face of the sealing rubber tube is attached to the lower end face of the upper spacing ring 18; the lower spacer ring 110 is loaded from the lower end of the mandrel 11, so that the upper end surface of the lower spacer ring is attached to the lower end surface of the sealing rubber cylinder 19; a lower auxiliary rubber cylinder 111 is loaded from the lower end of the mandrel 11, the bevel angle of the lower auxiliary rubber cylinder is required to face downwards, and the upper end face of the lower auxiliary rubber cylinder is attached to the lower end face of the lower spacing ring 110; loading 1 expandable metal-clad bowl 115 from the lower end of the mandrel 11, and requiring the opening of the expandable metal-clad bowl to be upwards attached to the oblique-angle surface of the lower auxiliary rubber cylinder 111; the internal thread at the upper end of the guide shoe 13 is connected with the external thread at the lower end of the mandrel 11, the upper end face of the guide shoe 13 is required to be in contact with the expandable metal-clad bowl 115, and the guide shoe 13 is installed in the threaded hole of the guide shoe 13 through two screws and is screwed down, so that the guide shoe 13 and the mandrel 11 are reliably fixed.

It should be noted that in the description of the present specification, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A tubing butt joint packer, comprising:

the packer comprises an oil pipe joint and a packer body;

the oil pipe joint comprises a first end and a second end which are opposite and are respectively used for connecting an upper butt joint oil pipe and the packer body;

the packer body includes:

the mandrel comprises a first end and a second end which are opposite, and two bosses which are distributed along the circumferential direction and extend along the axial direction are arranged at the position, close to the first end, of the outer circumferential surface of the mandrel and are used for pressing and holding the upper end surface of the lower butt joint oil pipe;

a long press cap connected to the first end of the mandrel;

a guide shoe connected to the second end of the mandrel;

a pressing cylinder, an opening pressing sleeve, a spacer bush, an upper auxiliary rubber cylinder, an upper spacer ring, a sealing rubber cylinder, a lower spacer ring and a lower auxiliary rubber cylinder are sequentially sleeved outside the mandrel from the long pressing cap to the guide shoe;

wherein, press the upper end of a section of thick bamboo to be connected the oil pipe connects the second end, the lower terminal surface of long pressure cap press hold in press the internal diameter reducing area of a section of thick bamboo, press the lower extreme of a section of thick bamboo through the shear pin with dabber axial fixity, the opening press the upper end of cover have with boss complex open slot, so that the opening press the cover to run through boss and its up end top hold in press the lower terminal surface of a section of thick bamboo, just the opening press the up end of cover with the interval preset distance between the up end of boss.

2. The tubing butt packer of claim 1,

the oil pipe joint includes:

the opposite two ends of the coupling are respectively provided with internal threads which are respectively used for connecting the upper butt joint oil pipe and the variable buckle nipple;

and the opposite two ends of the variable buckle nipple are respectively provided with internal threads which are respectively used for connecting the coupling and the pressing barrel of the packer body.

3. The tubing butt packer of claim 1,

the inner surfaces of the pressing cylinders are respectively provided with tooth-shaped slip teeth;

the packer body further includes:

and the locking slip is fixed in a positioning groove of the inner hole of the long pressing cap and is provided with a sawtooth thread, and the locking slip is used for being matched with the toothed slip teeth of the pressing cylinder so as to limit the long pressing cap to slide towards the direction far away from the second end of the mandrel.

4. The tubing butt packer of claim 1,

the inner hole of the pressing cylinder is provided with at least one circle of sealing grooves for accommodating a sealing ring so as to realize sealing with the mandrel.

5. The tubing butt packer of claim 1,

the pressure cylinder is circumferentially provided with 6 threaded holes for connecting 6 shearing pins so as to realize axial fixation with the core shaft.

6. The tubing butt packer of claim 1,

the upper end of the inner hole of the long pressing cap is provided with a conical hole section, and the inner diameter of the conical hole section is gradually reduced from the upper end to the lower end;

wherein the taper of the taper hole section is 15 degrees.

7. The tubing butt packer of claim 1,

the spacer bush comprises a first spacer bush and a second spacer bush which are different in axial length; or the like, or, alternatively,

the spacer comprises a first spacer and a second spacer which are equal in axial length.

8. The tubing butt packer of claim 1,

go up supplementary packing element with one side that supplementary packing element deviates from each other down is provided with respectively and can expands metal package bowl, and upper and lower two the opening face of metal package bowl that can expand respectively with go up supplementary packing element with the bevel face laminating of supplementary packing element down.

9. The tubing butt packer of claim 1,

the lower end of the periphery of the guide shoe is provided with a conical surface section, and the inner diameter of the conical surface section is gradually reduced from the upper end to the lower end;

wherein, the taper of the conical surface section is 15 degrees.

10. The tubing butt packer of claim 1,

the length of the mandrel is 1.5-2 m.

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