A Y-joint device for an oil production pipe string

Abstract

The present invention relates to a Y-joint device for a production tubing string, which comprises a housing, a valve ball and an elastic dialing member. The interior of the housing is provided with a Y-shaped channel having three ports, one port is connected to a tubing channel, and the other two ports are respectively connected to a test channel and a production channel; the valve ball is used to move and switch to block the port parts of the test channel and the production channel; one end of the elastic dialing member is a dialing end for dialing the valve ball to move, and the other end is a fixed end connected to the interior of the housing; through the elastic dialing member and the valve ball structure, the switching between the oil production channel and the test channel of the production tubing string can be realized, the operation procedure is saved, the channel sealing performance is ensured at the same time, and the operation efficiency, operation reliability and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield production, and relates to a downhole completion tool in oilfield production, and particularly relates to a Y-joint device for a production tubing string. Background Art

[0002] Currently, in oilfield production, when switching the oil production channel and the test channel of the production tubing string, a Y-joint is mostly used.

[0003] The existing Y-joint tools mostly consist of a Y-shaped head, an upper working cylinder, a lower working cylinder, a check valve, a production plug, and an isolation sleeve. When switching between production and test operations, it is necessary to insert and fish out the plug, resulting in reduced operation efficiency and increased risks to the reliability and safety of the operation. Summary of the Invention

[0004] In view of the above problems, the object of the present invention is to provide a Y-joint device for a production tubing string and a production tubing string, which can realize the switching of the oil production channel and the test channel of the production tubing string through an elastic dialing member and a valve ball structure, save the operation procedure, and at the same time ensure the channel sealing performance, and improve the operation efficiency, operation reliability and safety.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a Y-joint device for a production tubing string, including:

[0007] A housing with a Y-shaped channel having three ports inside, one port is connected to the tubing channel, and the other two ports are respectively connected to the test channel and the production channel;

[0008] A valve ball for moving and switching to block the port parts of the test channel and the production channel;

[0009] An elastic dialing member, one end is a dialing end for dialing the valve ball to move, and the other end is a fixed end connected to the inside of the housing.

[0010] Preferably, the elastic dialing member includes a bracket, an elastic member and a valve plate. The bracket is the fixed end and is fixedly installed inside the housing; the valve plate is the dialing end and is connected to the bracket through the elastic member, and the valve plate is used for dialing the valve ball to move.

[0011] Preferably, first openings are provided on both sides of the valve plate, and one end of the elastic member extends into the first opening; a first screw hole is provided on the valve plate, the first screw hole is connected to the first opening, and a first bolt is provided in the first screw hole; a first pressure block is provided in the first opening, a first blind hole is provided on the first pressure block, and the end of the first bolt extends into the first blind hole to push the first pressure block, and the other side of the first pressure block contacts and fixes the elastic member.

[0012] Preferably, the number of the elastic members is two, and the valve plate is an arc-shaped H-shaped plate, the H-shaped plate includes a horizontal plate and two vertical plates, the vertical plates are respectively connected to the two sides of the horizontal plate, an arc-shaped opening is formed between one side of the two vertical plates, and a gap is formed between the lower parts of the other sides; the gap is located on one side of the elastic force direction of the toggle end, the gap width is greater than the valve ball diameter, and the arc-shaped opening width is less than the valve ball diameter; the two toggle ends are respectively connected to the two sides of the H-shaped plate, and the lower parts of the two vertical plates are respectively used to clamp on both sides of the valve ball, and when the valve ball is toggled, the valve ball enters the gap.

[0013] Preferably, a second opening is provided on the bracket, and one end of the elastic member is fixed in the second opening; a second screw hole is provided on the bracket, the second screw hole is connected to the second opening, a second bolt is provided in the second screw hole, a second pressure block is provided in the second opening, a second blind hole is provided on the second pressure block, the end of the second bolt extends into the second blind hole to push the second pressure block, and the other side of the second pressure block contacts and fixes one end of the elastic member.

[0014] Preferably, the bracket is in a vertical tubular shape, and the inner diameter of the bracket is smaller than the outer diameter of the valve ball.

[0015] Preferably, a support plate is connected between the bracket and the test pipe.

[0016] Preferably, the elastic member is a leaf spring, the upper and lower parts of which are both straight plate sections, and the middle part is an arc-shaped curved section; the two straight plate sections have a set angle, and the angle faces the valve ball.

[0017] Preferably, the shell is a vertical tube, and the inner diameter of the upper part of the shell is smaller than the inner diameter of the lower part; the upper part of the shell is fixed to the outside of the lower part of the oil pipe channel by threaded sleeves, and the lower part of the shell is fixed to the upper part of the production channel and the upper part of the test channel by threaded sleeves respectively.

[0018] Preferably, a sliding surface is provided on the inner wall of the shell, and two ends of the sliding surface are respectively located at the test channel opening and the production channel opening; the sliding surface is an inclined surface, and one end located at the test channel opening is higher than the other end located at the production channel opening.

[0019] Due to the above technical solutions adopted by the present invention, it has the following advantages:

[0020] 1. For the Y-joint device for production tubing string provided by the present invention, during the pumping period, when the electric pump is turned on, the valve ball is sealed in the test channel under the action of the pump thrust and enters the production state; during the pump shutdown period, when the electric pump is turned off, the valve ball is sealed in the production channel under the elastic force of the elastic component and stops production, and testing operations can be carried out; thus, the automatic switching between the production state and the non-production state can be realized according to the operating state of the electric pump; without the need for wire operations and fishing plugs, the switching of the oil production channel and the test channel of the production tubing string can be achieved, saving the operation procedures, greatly saving the on-site operation time, while ensuring the channel sealing performance, contributing to reservoir protection and wellbore safety, improving the operation efficiency, operation reliability and safety; at the same time, the operation efficiency of the electric pump production well is improved and the operation cost is reduced.

[0021] 2. For the Y-joint device for production tubing string provided by the present invention, the inner walls of the orifices of the test channel and the production channel can be inverted conical sides, which promotes the contact sealing between the outer wall of the valve ball and the inverted conical sides when the valve ball is located at the orifices of the test channel and the production channel, reduces the decline of the sealing performance caused by the damage of the sealing surface, ensures the effectiveness of the sealing surface, and prolongs the service life of the Y-joint device. Description of the Drawings

[0022] Figure 1 is a cross-sectional view of the Y-joint device for production tubing string provided by an embodiment of the present invention during production operations;

[0023] Figure 2 is a cross-sectional view of the Y-joint device for production tubing string provided by an embodiment of the present invention during testing operations;

[0024] Figure 3 is a structural schematic diagram of the Y-joint device for production tubing string provided by an embodiment of the present invention;

[0025] Figure 4 is a three-dimensional structural schematic diagram of the hidden housing provided by an embodiment of the present invention;

[0026] Figure 5 is a right-view structural schematic diagram of the hidden housing provided by an embodiment of the present invention;

[0027] Figure 6 is a left-view structural schematic diagram of the hidden housing provided by an embodiment of the present invention;

[0028] Figure 7 is a right-view structural schematic diagram of the hidden housing provided by an embodiment of the present invention;

[0029] Figure 8 is a bottom-view structural schematic diagram of the hidden housing provided by an embodiment of the present invention;

[0030] Figure 9 It is a schematic structural diagram of the left view with a downward inclination of the housing of the Y-joint device for production tubing string provided by an embodiment of the present invention;

[0031] Figure 10 It is a schematic structural diagram of the left view with an upward inclination of the housing of the Y-joint device for production tubing string provided by an embodiment of the present invention.

[0032] Reference signs in the drawings:

[0033] 100 is a tubing channel, 200 is a test channel, and 300 is a production channel;

[0034] 1 is a valve ball;

[0035] 2 is an elastic pusher, 201 is a bracket, 202 is an elastic member, and 203 is a valve plate;

[0036] 2011 is a second opening, 2012 is a second screw hole, 2013 is a second pressing block, 2014 is an arc-shaped groove, 2015 is an arc-shaped groove surface, and 2016 is a support plate;

[0037] 2031 is a first opening, 2032 is a first screw hole, 2033 is a first pressing block, 2034 is a horizontal plate, 2035 is a vertical plate, 2036 is a positioning spherical surface, 2037 is an arc-shaped surface, 2038 is an arc-shaped curved opening, and 2039 is a gap;

[0038] 3 is a housing, 301 is a sliding surface, and 302 is an arc-shaped curved surface;

[0039] 4 is a first sealing surface;

[0040] 5 is a second sealing surface. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "assembly", "installation", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] The Y-joint device for production tubing string provided by the present invention uses an elastic dialing member to dial the valve ball, so that the valve ball can automatically switch between two states of a sealing test channel and a sealing production channel under the action of the fluid pushing force of the pump and the elastic force of the elastic dialing member respectively, to respectively achieve the smoothness of the production channel and the test channel, so as to carry out production operations and test operations respectively. Thus, without investing in and fishing for a plug, the switching of the oil production channel and the test channel of the production tubing string can be realized, saving the operation procedure, while ensuring the channel sealability and improving the operation efficiency, operation reliability and safety.

[0045] Next, the Y-joint device for production tubing string provided by the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0046] Embodiment

[0047] As Figure 1 shown, the Y-joint device for production tubing string provided by this embodiment includes a housing 3, a valve ball 1, and an elastic dialing member 2. The housing 3 has a Y-shaped channel with three ports inside. One port is connected to the tubing channel 100, and the other two ports are respectively connected to the test channel 200 and the production channel 300; the valve ball 1 is used to move and switch to block the port parts of the test channel 200 and the production channel 300; one end of the elastic dialing member 2 is a dialing end for dialing the valve ball to move, and the other end is a fixed end connected to the inside of the housing 3.

[0048] For the Y-joint device for production tubing string of this embodiment, when the electric pump is turned on, the downhole fluid flows through the production channel 300 into the housing 3. Under the action of the fluid thrust, the valve ball 1 pushes the dialing end of the elastic dialing member 2 to move. At the same time, the valve ball 1 moves to the port part of the test channel 200 to seal the test channel 200 and enter the production state, as Figure 1 shown; when the electric pump is turned off, the production channel 300 stops production. Under the elastic dialing action of the dialing end of the elastic dialing member 2, the valve ball 1 moves to the port part of the production channel 300 to seal the production channel 300. At this time, the test operation can be carried out, as Figure 2As shown in the figure; thus, it is possible to switch the oil production channel and the test channel of the production string without putting in and fishing out the plug, saving the operation procedure, ensuring the channel sealing performance, improving the operation efficiency, operation reliability and safety; at the same time, improving the operation efficiency of the electric submersible pump production well and reducing the operation cost.

[0049] As Figure 2 shown, the elastic force of the elastic shifting member 2 ensures that when the pumping fluid stops acting, the valve ball 1 can be shifted from the test channel 200 to the production channel 300 or the middle position between these two channels; at the same time, the elastic force of the elastic shifting member 2 ensures that when the flow rate of the pumping fluid is small, the valve plate 203 can still act to meet the small production requirements.

[0050] As Figure 2 shown, in this embodiment, the elastic shifting member 2 includes a bracket 201, an elastic member 202 and a valve plate 203. The bracket 201 is a fixed end and is fixedly installed in the housing 3; the valve plate 203 is a shifting end and is connected to the bracket 201 through the elastic member 202. The valve plate 203 is used to shift the valve ball 1 to move, and the valve plate 203 can more effectively shift the valve ball 1 to move through the elastic acting force of the elastic member 202.

[0051] In some other embodiments, the elastic member 202 is a leaf spring or a torsion spring.

[0052] As Figures 1 to 3 shown, in some embodiments, first openings 2031 are provided on both sides of the valve plate 203, and one end of the elastic member 202 extends into the first openings 2031; first screw holes 2032 are provided on the valve plate 203, the first screw holes 2032 communicate with the first openings 2031, and first bolts are provided in the first screw holes 2032, and the ends of the first bolts contact and fix the elastic member 202. The lower end of the elastic shifting member 2 extends into the first openings 2031 opened on the valve plate 203 and is fixed by the first bolts, facilitating the convenient and firm connection between the elastic member 202 and the valve plate 203.

[0053] In some other embodiments, the tubing channel 100, which is used to connect the upper tubing, is located above the test channel 200; the production channel 300 is located beside the test channel 300 and is used to connect the electric submersible pump; the test channel 300, which is used to connect the bypass tubing, can also be used to connect the electric submersible pump for a double electric submersible pump well. The three channels form an inverted Y-shaped structure. The elastic shifting member 2 is located above the valve ball 1, and the shifting end is located below the fixed end. In this way, the upper end of the elastic shifting member 2 is fixed as the fixed end, and the lower end is the shifting end to shift the valve ball 1 to alternately move between the port of the test channel 200 and the port of the production channel 300, thereby alternately opening the production channel 300 and the test channel 200.

[0054] As Figures 1 to 3 shown, in some other embodiments, the valve plate 203 is a vertical plate. The lower part of the valve plate 203 with a vertical plate structure shifts the valve ball 1.

[0055] In some other embodiments, the first opening 2031 is in the shape of a vertical groove, with an upper opening and a closed lower end. The elastic member 202 can be conveniently inserted into the vertically grooved first opening 2031 for fixation.

[0056] As Figures 1 to 3 shown, in some embodiments, a first pressing block 2033 is arranged in the first opening 2031. One side of the end of the first bolt contacts and fixes the first pressing block 2033, and the other side of the first pressing block 2033 contacts and fixes the elastic member 202. By fixing the elastic member 202 through the contact and extrusion of the first pressing block 2033, the contact area of the extrusion connection can be increased, the extrusion connection force can be increased, and the firmness of the connection structure between the elastic member 202 and the valve plate 203 in the first opening 2031 can be improved.

[0057] In some embodiments, a first blind hole is arranged on the first pressing block 2033. The first blind hole can be a light hole. The end of the first bolt extends into the first blind hole to fix the first pressing block 2033. By fixing and connecting the first pressing block 2033 through the extension of the first bolt into the first blind hole on the first pressing block 2033, the firm stability of the first pressing block 2033 can be improved, enabling it to more firmly press and connect the elastic member 202.

[0058] In some other embodiments, the first screw hole 2032 is a horizontal screw hole, and the first bolt is a horizontal bolt. The horizontal first screw hole 2032 and the first bolt can more conveniently and firmly fix the elastic member 202.

[0059] In some other embodiments, the first blind hole is a horizontal light hole. The first bolt extends into the horizontal first blind hole on the first pressing block 2033, which can conveniently and firmly fix the first pressing block 2033.

[0060] In some other embodiments, the number of the first screw holes 2032 is at least two, distributed along the length direction of the first opening 2031 and can be evenly distributed. First bolts are respectively arranged in the plurality of first screw holes 2032 to jointly and more firmly fix the elastic member 202.

[0061] In some other embodiments, the number of the first blind holes is equal to that of the first screw holes 2032. The first bolts respectively extend into the plurality of first blind holes to jointly and more firmly fix the first pressing block 2033.

[0062] In some other embodiments, the first opening 2031 is a rectangular notch, and the first pressing block 2033 is a rectangular block. The rectangular notch-shaped first opening 2031 and the rectangular block-shaped first pressing block 2033 facilitate the processing and installation of the two.

[0063] In some other embodiments, the first opening 2031 is a U-shaped opening with a downwardly arcuate convexity on the lower side. The downwardly arcuate convexity on the lower side of the first opening 2031 prevents damage to the bottom of the first pressing block 2033.

[0064] As Figure 4 and Figure 6 shown, in some embodiments, the number of elastic members 202 is two, which are respectively located on both sides of the elastic dialing member 2, can provide a greater dialing force, and can more smoothly and evenly dial the valve ball 1 to move.

[0065] As Figures 5 to 7 shown, in some embodiments, the valve plate 203 is an H-shaped plate with an arcuate bend. The H-shaped plate includes a transverse plate 2034 and two vertical plates 2035. The vertical plates 2035 are respectively connected to both sides of the transverse plate 2034. An arcuate bend opening 2038 is formed between one sides of the two vertical plates 2035, and a gap 2039 is formed between the lower parts of the other sides; the two elastic members 202 are respectively connected to both sides of the H-shaped plate, and the lower parts of the two vertical plates 2035 are respectively used for clamping both sides of the valve ball 1 to dial the valve ball 1. When the lower parts of the two vertical plates 2035 jointly clamp both sides of the valve ball 1 to dial the valve ball 1 to move, the arcuate bend structure of the valve plate 203 encloses and limits the valve ball 1, and plays a pushing role on the valve ball 1.

[0066] In some embodiments, the inner wall curvature radius of the valve plate 203 is smaller than the outer diameter of the valve ball 1. In this way, the valve plate 203 can prevent the valve ball 1 from entering and exiting the oil pipe channel 100.

[0067] As Figures 1 to 7 shown, in some other embodiments, first openings 2031 are respectively arranged on both sides of the top surface of the transverse plate 2034. One ends of the two elastic members 202 are respectively fixedly connected in the first openings 2031 on both sides of the transverse plate 2034, and can apply a balanced and stable elastic acting force to the valve ball 1 through the valve plate 203 to promote the smooth movement of the valve ball 1.

[0068] As Figures 4 to 7 shown, in some other embodiments, the H-shaped plate is a vertical plate and is arcuately bent along the vertical axis. The valve plate 203 with a vertical H-shaped plate structure is convenient for processing and installation; the valve plate 203 is arcuately bent along the vertical axis, that is, its cross-section is arcuate, ensuring that it plays an enclosing and limiting and pushing role on the valve ball 1.

[0069] As Figures 5 to 7As shown, in some embodiments, the gap 2039 is located on one side in the direction of the elastic force of the elastic member 202. The width of the gap 2039 is greater than the diameter of the valve ball 1, and the width of the arc-shaped bending opening 2038 is less than the diameter of the valve ball 1. When the lower parts of the two vertical plates 2035 clamp the valve ball 1, the valve ball 1 enters the gap 2039. In this way, it can be ensured that the valve ball 1 is smoothly clamped between the lower parts of the two vertical plates 2035 through the gap 2039, which plays a limiting role on the valve ball 1 and avoids the skew of the moving path of the valve ball 1. Moreover, it can ensure that the valve ball 1 can smoothly fall into the port part of the test channel 200 and contact the sealing surface of its inner wall. Also, it can prevent the valve ball 1 from sliding out from the arc-shaped bending opening 2038 and ensure the pushing effect of the valve plate 203 on the valve ball 1.

[0070] As Figures 4 to 6 shown, further, the central angle of the sector where the arc-shaped bending structure of the H-shaped plate of the valve plate 203 is located is greater than or equal to 180°, that is, the H-shaped plate is an arc-shaped plate greater than or equal to a semi-circle. In this way, it is convenient for the valve ball 1 to be clamped between the lower parts of the two vertical plates 2035 through the gap 2039, and it can ensure that the lower parts of the two vertical plates 2035 on both sides of the arc-shaped bending opening 2038 play a blocking and pushing role on the valve ball 1.

[0071] As Figures 4 to 7 shown, further, the bottom surface of the horizontal plate 2034 and the inner walls of the lower parts of the two vertical plates 2035 on both sides of the gap 2039 are positioning spherical surfaces 2036. The positioning spherical surfaces 2036 are spherical surfaces protruding in the direction opposite to the elastic force of the elastic member 202, and the radius of the positioning spherical surfaces 2036 is greater than or equal to the radius of the valve ball 1. In this way, when the valve ball 1 is clamped between the lower parts of the two vertical plates 2035 through the gap 2039, it can be buffered and protected by the positioning spherical surfaces 2036, avoiding damage to the valve ball 1 and promoting the smooth clamping and pushing of the valve ball 1.

[0072] In this embodiment, the arc-shaped bending structure of the H-shaped plate of the valve plate 203 has a more comprehensive and reliable enclosure and limiting effect on the valve ball 1. The valve plate 203 can not only play a pushing role on the valve ball 1, but also reduce the contact area and friction force between the valve plate 203 and the valve ball 1 when the valve plate 203 pushes the valve ball 1, promoting the movement of the valve ball 1 being pushed.

[0073] Alternatively, in other embodiments, the arc-shaped curved opening 2038 is located on one side of the elastic force direction of the toggle end 201, the width of the arc-shaped curved opening 2038 is greater than the diameter of the valve ball 1, and the width of the gap 2039 is less than the diameter of the valve ball 1; when the lower parts of the vertical plates 2035 on both sides clamp the valve ball 1, the valve ball 1 enters the arc-shaped curved opening 2038. In this way, it can ensure that the valve ball 1 is smoothly clamped between the lower parts of the two vertical plates 2035 through the arc-shaped curved opening 2038, which plays a limiting role on the valve ball 1 and prevents the movement path of the valve ball 1 from being skewed; and ensure that the valve ball 1 can smoothly fall into the port part of the test channel 200 and contact the sealing surface of its inner wall; and it can also prevent the valve ball 1 from sliding out of the gap 2039, ensuring the pushing effect of the valve plate 203 on the valve ball 1.

[0074] Furthermore, the central angle of the sector where the arc-shaped curved structure of the H-shaped plate of the valve plate 203 is located is less than or equal to 180°, that is, the H-shaped plate is an arc-shaped plate less than or equal to a semicircle. This makes it convenient for the valve ball 1 to be clamped between the lower parts of the two vertical plates 2035 through the arc-shaped curved opening 2038, and ensures that the lower parts of the vertical plates 2035 on both sides of the gap 2039 play a role in blocking and pushing the valve ball 1.

[0075] Furthermore, the bottom surface of the horizontal plate 2034 and the lower inner walls of the vertical plates 2035 on both sides of the arc-shaped opening 2038 are positioning spherical surfaces 2036, which are spherical surfaces that protrude in the opposite direction of the elastic force of the elastic member 202, and the radius of the positioning spherical surface 2036 is greater than or equal to the radius of the valve ball 1. In this way, when the valve ball 1 passes through the arc-shaped opening 2038 and is clamped between the lower parts of the two vertical plates 2035, it can be buffered and protected by the positioning spherical surface 2036, so that the valve ball 1 is prevented from being damaged and the valve ball 1 is smoothly clamped and pushed.

[0076] like Figures 1 to 7 As shown, in other embodiments, the other end of the elastic member 202 is fixed to the bracket 201 to promote the elastic member 2021 to exert elastic force.

[0077] In some embodiments, the bracket 201 is provided with a second opening 2011, and the other end of the elastic member 202 is fixed in the second opening 2011; the bracket 201 is provided with a second screw hole 2012, the second screw hole 2012 is connected with the second opening 2011, a second bolt is provided in the second screw hole 2012, and the end of the second bolt contacts and fixes the other end of the elastic member 202. The other end of the elastic member 202 extends into the second opening 2011 of the bracket 201 and is fixed by the second bolt, so that the fixed end 202 can be conveniently and firmly installed.

[0078] like Figures 1 to 7 As shown, in other embodiments, the bracket 201 is located above the elastic member 202, so that the bracket 201 is fixedly connected to the upper end of the elastic member 202.

[0079] like Figure 1 and Figure 3 As shown, in some other embodiments, the bracket 201 is in a vertical tubular shape, which facilitates the processing and installation of the bracket 201.

[0080] like Figures 1 to 6 As shown, in other embodiments, the bracket 201 is placed at the end portion of the oil pipe channel 100 to facilitate the installation of the bracket 201.

[0081] In some embodiments, the inner diameter of the bracket 201 is smaller than the outer diameter of the valve ball 1 , so as to prevent the valve ball 1 from passing through the bracket 201 and entering and rushing out of the oil pipe channel 100 .

[0082] like Figures 1 to 7 As shown, in some embodiments, a support plate 2016 is connected between the bracket 201 and the test pipe 200 to facilitate the fixed installation of the bracket 201 and realize the suspension support of the bracket 201 to the valve plate 203 and the elastic member 202.

[0083] In other embodiments, the lower end of the support plate 2016 is connected to the side wall of the port of the test pipe 200, and the upper end is connected to the lower side wall of the bracket 201. The support plate 2016 is conveniently connected between the test pipe 200 and the bracket 201 without affecting the movement of the valve ball 1 and the sealing of the pipe.

[0084] In other embodiments, the support plate 2016 is a vertical plate, which is convenient for processing, connecting and installing the support plate 2016.

[0085] In other embodiments, the vertical center line of the support plate 2016, the vertical center line of the valve plate 203 and the toggle end 201 are located in the same vertical plane. The balance stability of the connection structure of the support plate 201 and the valve plate 203 is ensured, thereby ensuring the firmness and reliability of the Y-joint device. In addition, the support plate 2016 is located on the side of the support plate 201 opposite to the elastic force of the toggle end 201, further ensuring that the movement of the valve ball 1 and the sealing at the pipe mouth are not affected.

[0086] like Figures 1 to 7 As shown, in some other embodiments, the second opening 2011 is in the shape of a vertical groove, with an open lower end and a closed upper end, so that the fixing end 201 can be inserted into the second opening 2011 for fixing.

[0087] like Figures 1 to 7 As shown, in some embodiments, a second pressing block 2013 is disposed in the second opening 2011, the end of the second bolt contacts and fixes one side of the second pressing block 2013, and the other side of the second pressing block 2013 contacts and fixes the elastic member 202. The second pressing block 2013 increases the contact area with the elastic member 202, thereby increasing the area of action of the squeezing and fixing force on the fixed end 202, ensuring that the elastic member 202 is firmly fixed.

[0088] likeFigures 3 to 7 As shown, in some embodiments, a second blind hole is provided on the second pressing block 2013, and the end of the second bolt extends into the second blind hole to fix the second pressing block 2013. The second bolt extends into the second blind hole on the second pressing block 2013 to fix the second pressing block 2013, which can improve the firmness and stability of the second pressing block 2013, so that it can more stably squeeze and connect the elastic member 202.

[0089] In some other embodiments, the second screw hole 2012 is a transverse screw hole, and the second bolt is a transverse bolt. The transverse second screw hole 2012 and the second bolt can fix the fixing end 202 more conveniently and firmly.

[0090] In other embodiments, the second blind hole is a transverse light hole. The second bolt extends into the transverse second blind hole on the second pressing block 2013, so as to fix the second pressing block 2013 conveniently and firmly.

[0091] In other embodiments, the number of the second screw holes 2012 is at least two, and they are evenly distributed along the length direction of the second opening 2011. Second bolts are respectively disposed in the plurality of second screw holes 2012 to more firmly fix the fixing end 202.

[0092] In some other embodiments, the number of the second blind holes is equal to the number of the second screw holes 2012. The second bolts are inserted into the plurality of second blind holes respectively, and together fix the second pressing block 2013 more firmly.

[0093] like Figures 1 to 6 As shown, in other embodiments, the second opening 2011 is a rectangular notch, and the second pressing block 2013 is a rectangular block. The second opening 2011 in the shape of a rectangular notch and the second pressing block 2013 in the shape of a rectangular block facilitate processing and installation of the two.

[0094] In some other embodiments, the second opening 2011 is a U-shaped opening with an upper side convexly arcuately upwardly. The upper side of the second opening 2011 convexly arcuately upwardly to avoid damaging the top of the second pressing block 2013.

[0095] like Figures 1 to 4 As shown, in some embodiments, the elastic member 202 is a leaf spring, the upper and lower parts of which are straight plate sections, and the middle part is an arc-shaped curved section; the two straight plate sections have a set angle, and the angle faces the valve ball 1. The straight plate section is easy to fix, and the arc-shaped curved section can fully ensure the elastic force strength of the toggle.

[0096] In some embodiments, the protruding direction of the arc-shaped curved section is opposite to the pushing direction, so that the leaf spring has a greater tendency to store force and reset after being pushed by the valve ball 1, which can further ensure that the arc-shaped curved section provides a more sufficient elastic pushing force to the valve plate 203.

[0097] In some embodiments, an arc-shaped groove 2014 is provided at the opening of the second opening 2011. The inner wall of the arc-shaped groove 2014 on the convex side of the arc-shaped bending section is an arc-shaped groove surface 2015. The convex direction of the arc-shaped groove surface 2015 is the same as the convex direction of the arc-shaped bending section. The arc-shaped bending section is arranged in the arc-shaped groove 2014. In this way, the upper end of the elastic member 202 and the arc-shaped bending section both extend into the second opening 2011, improving the installation firmness of the elastic member 202 and facilitating the guarantee of its elastic force effect. At the same time, the arc-shaped groove surface 2015 prevents the arc-shaped bending section of the elastic member 202 from being damaged, ensuring the effectiveness and service life of the elastic member 202.

[0098] In some other embodiments, the upper part of the vertical plate 2035 extends between the arc-shaped groove surface 2015 and the arc-shaped bending section. Thus, the firmness of the connection structure among the valve plate 203, the elastic member 202, and the bracket 201 is ensured.

[0099] In some other embodiments, the upper part of the vertical plate 2035 is wedge-shaped with the wedge angle facing upward. This facilitates the upper part of the vertical plate 2035 to extend between the arc-shaped groove surface 2015 and the arc-shaped bending section 203.

[0100] In some other embodiments, both side surfaces of the upper part of the vertical plate 2035 are arc-shaped surfaces 2037. The convex direction of the arc-shaped surfaces 2037 is the same as the convex direction of the arc-shaped bending section 203. The two arc-shaped surfaces 2037 are adjacent to the arc-shaped groove surface 2015 and the side wall of the arc-shaped bending section 203 respectively. This prevents damage between the upper part of the vertical plate 2035 and the arc-shaped groove surface 2015.

[0101] As Figure 1 and Figure 2 、 Figures 8 to 10 shown, in some embodiments, a housing 3 is sleeved outside the Y-joint device. This can play a role in fixed connection and protection for the Y-joint device, and the housing 3 also plays a heat insulation role.

[0102] In some other embodiments, the housing 3 is tubular. This facilitates the processing and installation of the housing 3.

[0103] In some other embodiments, the bracket 201 is fixedly connected inside the upper part of the housing 3. In this way, the valve plate 203 and the bracket 201 are connected by the elastic member 202, and the bracket 201 is connected to the housing 3, improving the firmness performance of the overall structure of the Y-joint device.

[0104] In some other embodiments, the bracket 201 is connected and fixed inside the upper part of the housing 3 by interference fit. This ensures the firmness of the bracket 201.

[0105] In some other embodiments, when there is no bracket 201, the upper end of the elastic member 202 can also be fixedly connected to the inner wall of the housing 3.

[0106] As Figure 1 andFigure 2 As shown, in some embodiments, a sliding surface 301 is provided on the inner wall of the housing 3, and both ends of the sliding surface 301 are respectively located at the port of the test channel 200 and the port of the production channel 300. When the valve ball 1 moves alternately between the port of the test channel 200 and the port of the production channel 300, it contacts the sliding surface 301, that is, the valve ball 1 moves on the sliding surface 301, ensuring the stable and reliable movement of the valve ball 1 and preventing the valve ball 1 from falling off.

[0107] In some embodiments, the sliding surface 301 is an inclined surface, and the end located at the port of the test channel 200 is higher than the end located at the port of the production channel 300. This facilitates the movement of the valve ball 1 from the port of the test channel 200 to the port of the production channel 300 under the elastic force of the elastic dialing member 2. Usually, the force of the pump pushing the fluid in the production channel 300 is greater than the elastic force of the elastic dialing member 2. Therefore, the above inclined structure of the sliding surface 301 can also facilitate the elastic dialing member 2 to overcome the force of the pump pushing the fluid in the production channel 300 and move the valve ball 1 to seal the production channel 300 in case of an accident, ensuring the smoothness of the test channel 200 for testing operations.

[0108] In some other embodiments, an arc-shaped curved surface 302 is provided on the inner wall of the housing 3. The arc-shaped curved surface 302 is located outside the moving area of the valve ball 1 and protrudes outward. The outside refers to the side away from the center of the inside of the housing 3. This can prevent the inner wall of the housing 3 from damaging the valve ball 1. In addition, the arc-shaped curved surface 302 forms a curved flow channel, ensuring the balance between the fluid force and the elastic force of the elastic dialing member 2, controlling and adjusting the magnitude and direction of the fluid force on the valve ball 1, and facilitating the formation of a seal between the valve ball 1 and the sealing surface of the inner wall of the test channel 200, making the seal reliable.

[0109] In some other embodiments, the width of the curved flow channel formed by the arc-shaped curved surface 302 is greater than the diameter of the valve ball 1, ensuring the smooth rolling movement of the valve ball 1.

[0110] In some embodiments, the housing 3 is a vertical pipe. This facilitates the processing and installation of the housing 3.

[0111] In some embodiments, the arc-shaped curved surface 302 is located above the moving area of the valve ball 1 and protrudes upward. This can prevent the inner wall of the housing 3 from damaging the valve ball 1.

[0112] In some embodiments, the inner diameter of the upper part of the housing 3 is smaller than the inner diameter of the lower part. This can match the inverted Y-shaped structure formed by the oil pipe channel 100, the test channel 200, and the production channel 300.

[0113] In some embodiments, the outer diameter of the upper part of the housing 3 is smaller than the outer diameter of the lower part. To further match the inverted Y-shaped structure formed by the oil pipe channel 100, the test channel 200, and the production channel 300.

[0114] As Figure 1 and Figure 2 、 Figures 8 to 10 shown, in some embodiments, the upper part of the housing 3 is sleeved outside the lower part of the tubing channel 100, and the lower part of the housing 3 is sleeved outside the upper parts of the production channel 300 and the test channel 200. This facilitates the sleeved installation of the housing 3 and ensures the sealing of the tubing channel 100, the production channel 300, and the test channel 200.

[0115] In some embodiments, the housing 3 is fixedly connected to the tubing channel 100, the production channel 300, and the test channel 300 respectively by threads. This ensures the firm connection of the housing 3.

[0116] As Figures 1 to 4 shown, in some other embodiments, the inner wall of the port part of the test channel 200 is set as the first sealing surface 4, and the first sealing surface 4 is an inverted conical side surface, which is used to cooperate with the outer wall of the valve ball 1 to form a seal. When the valve ball 1 is located at the port part of the test channel 200, it promotes the contact seal between the outer wall of the valve ball 1 and the inverted conical side surface, ensures the effectiveness of the sealing surface, and improves the service life of the Y-joint device.

[0117] In some other embodiments, the inner wall of the port part of the production channel 300 is set as the second sealing surface 5, and the second sealing surface 5 is an inverted conical side surface, which is used to cooperate with the outer wall of the valve ball 1 to form a seal. Similarly, when the valve ball 1 is located at the port part of the production channel 300, it promotes the contact seal between the outer wall of the valve ball 1 and the inverted conical side surface, ensures the effectiveness of the sealing surface, and extends the service life of the Y-joint device.

[0118] In some other embodiments, the maximum inner diameters of the first sealing surface 4 and the second sealing surface 5 are smaller than the diameter of the valve ball 1 to prevent the valve ball 1 from falling.

[0119] When the production well is in the state of ESP lift, the downhole fluid flows through the production channel 300, pushes the valve ball 1 and drives the valve plate 203 to move to the test channel 200 at the same time. The valve ball 1 falls into the first sealing surface 4 on the inner wall of the upper end of the test channel 200 to form a seal, and the downhole fluid is lifted from the tubing channel 100 to the wellhead, meeting the requirements of production operations.

[0120] In the non-ESP lift state, when the production well needs to be tested, the ESP is shut down, and the elastic dial 2 connected between the bracket 201 and the valve plate 203 drives the valve plate 203 to push the valve ball 1 to move to the production channel 300. The valve ball 1 falls into the second sealing surface 5 on the inner wall of the upper end of the production channel 300 to form a seal; the test tool carried by the wire can enter the test channel 200 through the tubing channel 100, meeting the requirements of test operations.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A Y-joint device for a production tubing string, characterized in that, include: The shell has a Y-shaped channel with three ports, one port is connected to the oil pipe channel, and the other two ports are connected to the test channel and the production channel respectively; A valve ball, used for moving and switching the plugging between the test channel port and the production channel port; An elastic puller, one end of which is a pull-in end for pulling the valve ball to move, and the other end of which is a fixed end connected to the inside of the housing; The elastic shifting member comprises a bracket, an elastic member and a valve plate, wherein the bracket is a fixed end and is fixedly installed in the housing; the valve plate is the shifting end and is connected to the bracket through the elastic member, and the valve plate is used to shift the valve ball to move; There are two elastic members, and the valve plate is an arc-shaped H-shaped plate, which includes a horizontal plate and two vertical plates, the vertical plates are respectively connected to the two sides of the horizontal plate, an arc-shaped opening is formed between one side of the two vertical plates, and a gap is formed between the lower parts of the other sides; the gap is located on one side of the elastic force direction of the toggle end, the gap width is greater than the valve ball diameter, and the arc-shaped opening width is less than the valve ball diameter; the two toggle ends are respectively connected to the two sides of the H-shaped plate, and the lower parts of the two vertical plates are respectively used to clamp the two sides of the valve ball, and when the valve ball is toggled, the valve ball enters the gap; First openings are arranged on both sides of the valve plate, and one end of the elastic member extends into the first opening; a first screw hole is arranged on the valve plate, the first screw hole is communicated with the first opening, and a first bolt is arranged in the first screw hole; a first pressing block is arranged in the first opening, and a first blind hole is arranged on the first pressing block, and the end of the first bolt extends into the first blind hole to push the first pressing block, and the other side of the first pressing block contacts and fixes the elastic member; A second opening is provided on the bracket, and one end of the elastic member is fixed in the second opening; a second screw hole is provided on the bracket, the second screw hole is communicated with the second opening, a second bolt is provided in the second screw hole, a second pressure block is provided in the second opening, a second blind hole is provided on the second pressure block, the end of the second bolt extends into the second blind hole to push the second pressure block, and the other side of the second pressure block contacts and fixes one end of the elastic member.

2. The Y-joint device for production tubing string according to claim 1, wherein, The bracket is in a vertical tubular shape, and the inner diameter of the bracket is smaller than the outer diameter of the valve ball.

3. The Y-joint device for production tubing string according to claim 1, wherein, A support plate is connected between the bracket and the test channel.

4. The Y-joint device for production tubing string according to claim 1, wherein, The elastic member is a leaf spring, the upper and lower parts of which are both straight plate sections, and the middle part is an arc-shaped curved section; the two straight plate sections have a set angle, and the angle faces the valve ball.

5. The Y-joint device for production tubing string according to any one of claims 1-4, characterized in that, The shell is a vertical tube, and the inner diameter of the upper part of the shell is smaller than the inner diameter of the lower part; the upper part of the shell is fixed to the outside of the lower part of the oil pipe channel by threaded sleeves, and the lower part of the shell is fixed to the upper part of the production channel and the upper part of the test channel by threaded sleeves respectively.

6. The Y-joint device for production tubing string according to claim 5, characterized in that, The inner wall of the shell is provided with a sliding surface, and the two ends of the sliding surface are respectively located at the mouth of the test channel and the mouth of the production channel; the sliding surface is an inclined surface, and one end located at the mouth of the test channel is higher than the other end located at the mouth of the production channel.

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