Multifunctional shearing ball valveTechnical Field
The invention relates to the technical field of petroleum exploitation, in particular to a multifunctional shearing ball valve.
Background
In the deep water well completion process of offshore oil, a landing pipe column is used for being put into an upper well completion pipe column to finish the operations of opening and closing a valve, putting a plug and the like in a well, and the landing pipe column comprises tools such as an underwater test tree, a retention valve, a blowout prevention valve and the like. The blowout prevention valve is generally designed and configured at the upper end of the landing pipe column and has an emergency well closing function, but tools such as an underwater tree, a holding valve and the like cannot be configured in the landing pipe column according to the limited field operation condition aiming at the shallow water landing pipe column, the traditional blowout prevention valve has single function, the emergency safety guarantee is insufficient, and the shallow water underwater well completion requirement cannot be met.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a multifunctional shearing ball valve which has the functions of opening and closing the diameter of a pipe column, bearing up and down pressure difference, shearing a continuous oil pipe, a cable, pumping and the like.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The multifunctional shearing ball valve comprises an upper ball seat, a lower ball seat, a ball valve, an upper piston, a lower piston and a driving assembly, wherein the ball valve is rotatably arranged between the upper ball seat and the lower ball seat, through holes are formed in opposite sides of the ball valve in a penetrating mode, the upper piston is sleeved outside the upper ball seat and can reciprocate on the upper ball seat along the length direction of the upper ball seat, the lower piston is sleeved outside the lower ball seat and can reciprocate on the lower ball seat along the length direction of the lower ball seat, the upper piston is connected with the lower piston, a clearance ring is arranged between the upper piston and the lower piston, the driving assembly is arranged in the clearance ring, when the upper piston and the lower piston reciprocate together, the driving assembly drives the ball valve to rotate clockwise or anticlockwise, after the ball valve rotates anticlockwise, the direction of the through holes on the ball valve is the same with an oil path so as to achieve an opening state of the ball valve, after the ball valve rotates anticlockwise, the direction of the through holes on the ball valve is perpendicular to the direction of the oil path of the ball valve so as to achieve a closing state when the ball valve is opened or a cable penetrates through the ball valve.
The multifunctional shearing ball valve comprises a driving assembly and a torsion lug, wherein the driving assembly comprises a fixed ring and the torsion lug, notch grooves are formed in the top and the bottom of the ball valve, the fixed ring is arranged in a clearance ring between the upper piston and the lower piston, the torsion lug is fixedly connected to the top and the bottom of the inner wall of the fixed ring respectively, and the torsion lug stretches into the corresponding notch groove.
The multifunctional shearing ball valve is characterized in that the lower part of the torsion lug is preferably of a cylindrical structure, the outer circle of the bottom surface of the cylindrical structure is tangent to two side walls of the notch groove, and the notch groove is offset by 45 degrees from the center of the ball valve in the closed state of the ball valve.
The multifunctional shearing ball valve preferably further comprises an upper spring and a lower spring, wherein the upper springs are respectively arranged at the end part of the upper ball seat, far away from the ball valve, and the lower springs are respectively arranged at the end part of the lower ball seat, far away from the ball valve.
The multifunctional shear ball valve preferably further comprises a lower spring seat, wherein the lower spring seat is arranged at the rear end of the lower ball seat and sleeved in the lower piston, and the lower spring is positioned between the lower ball seat and the lower spring seat.
The multifunctional shearing ball valve is characterized in that the upper piston is preferably provided with a first liquid outlet, the lower piston is provided with a second liquid outlet, the first liquid outlet is positioned at the front end of the clearance ring, and the second liquid outlet is positioned at the rear end of the clearance ring.
The multifunctional shearing ball valve is characterized in that a notch is arranged on the ball valve at one side perpendicular to the through hole, and when the ball valve is closed and the cable or the oil pipe is sheared, the notch is clamped into the cable or the oil pipe to centralize the cable or the oil pipe.
The multifunctional shearing ball valve is characterized in that the notch is preferably in a horn mouth shape.
The multifunctional shear ball valve preferably further comprises a connecting ring, and the upper piston is connected with the lower piston through the connecting ring.
Due to the adoption of the technical scheme, the invention has the following advantages:
The ball valve has the functions of opening, closing, bearing, shearing, pumping and the like through the multifunctional design of the ball valve, can be used for multiple functions of one tool, meets different process design requirements, improves the applicability of the tool, reduces the purchase cost of the tool with different functions, and ensures the normal development of operation.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like parts are designated with like reference numerals throughout the drawings. In the drawings:
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a schematic view of the structure of the ball valve of the present invention, showing the structure of the notch groove;
FIG. 4 is a schematic view of the structure of the ball valve of the present invention, showing the configuration of the notches;
FIG. 5 is a schematic view of a torsion lug structure according to the present invention;
FIG. 6 is a schematic view of a retaining ring according to the present invention;
FIG. 7 is a schematic view of the tee down structure of the present invention;
FIG. 8 is a schematic illustration of the tee-up construction of the present invention;
FIG. 9 is a schematic view of the lower piston structure of the present invention;
FIG. 10 is a schematic view of the upper piston structure of the present invention;
FIG. 11 is a schematic view of a lower spring seat according to the present invention;
Fig. 12 is a schematic view of the pump of the present invention in the on state.
The various references in the drawings are as follows:
1-ball seat, 2-ball seat, 3-ball valve, 301-through hole, 302-notch groove, 303-notch, 4-upper piston, 5-lower piston, 6-fixed ring, 7-torsion lug, 8-upper spring, 9-lower spring, 10-lower spring seat, 11-first liquid outlet, 12-second liquid outlet, 13-connecting ring and 14-screw.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention 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 invention to those skilled in the art.
The invention provides a multifunctional shearing ball valve, which has the functions of opening, closing, bearing, shearing, pumping and the like through the multifunctional design of the ball valve, can be used at multiple positions by one tool, meets different technological design requirements, improves the applicability of the tool, reduces the purchase cost of the tool with different functions, and ensures the normal development of operation.
As shown in fig. 1, the multifunctional shear ball valve provided by the invention comprises an upper ball seat 1, a lower ball seat 2, a ball valve 3, an upper piston 4, a lower piston 5 and a driving assembly, wherein the ball valve 3 is rotatably arranged between the upper ball seat 1 and the lower ball seat 2, through holes 301 (see fig. 2) are formed in opposite sides of the ball valve 3 in a penetrating manner, the upper piston 4 is sleeved outside the upper ball seat 1 and can reciprocate on the upper ball seat 1 along the length direction of the upper ball seat 1, the lower piston 5 is sleeved outside the lower ball seat 2 and can reciprocate on the lower ball seat 2 along the length direction of the lower ball seat 2, the upper piston 4 is connected with the lower piston 5, a clearance ring is arranged between the upper piston 4 and the lower piston 5, the driving assembly is arranged in the clearance ring, when the upper piston 4 and the lower piston 5 reciprocate together, the driving assembly drives the ball valve 3 to rotate clockwise or anticlockwise, after the ball valve 3 rotates anticlockwise, the direction of the through holes 301 on the ball valve 3 is in the same direction as an oil path so as to realize the opening state of the ball valve 3, after the ball valve 3 rotates clockwise, the direction of the through holes 301 on the ball valve 3 are perpendicular to the direction of the oil path of the ball valve 3 so as to realize the closing state of the ball valve 3, when the ball valve 3 is opened or the ball valve 3 is opened in the opening state, and the cable is not shown in the state when the ball valve 3 is opened or closed by the ball valve 3.
In the above embodiment, preferably, the driving assembly comprises a fixed ring 6 and torsion lugs 7, the top and the bottom of the ball valve 3 are respectively provided with a notch groove 302 (see fig. 3), the fixed ring 6 is arranged in the clearance ring between the upper piston 4 and the lower piston 5, the top and the bottom of the inner wall of the fixed ring 6 are respectively fixedly connected with the torsion lugs 7 (see fig. 5), and the torsion lugs 7 extend into the corresponding notch grooves 302.
In the above embodiment, preferably, as shown in fig. 3, the lower part of the torsion lug 7 is a cylindrical structure, the outer circle of the bottom surface of the cylindrical structure is tangent to two side walls of the notch groove 302, and the notch groove 302 is offset from the center of the ball valve 3 by 45 ° in the closed state of the ball valve. Thereby, the ball valve 3 is more convenient to rotate.
In the above embodiment, preferably, the present invention further includes upper springs 8 and lower springs 9, wherein a plurality of upper springs 8 are respectively disposed at the end of the upper ball seat 1 far from the ball valve 3, and a plurality of lower springs 9 are respectively disposed at the end of the lower ball seat 2 far from the ball valve 3. Therefore, ball seats at two ends of the ball valve can be tightly contacted with the ball valve in the working process of the ball valve, the sealing capability is enhanced, and meanwhile, the ball valve can be effectively sealed after repeated switching wear is guaranteed.
In the above embodiment, the invention preferably further comprises a lower spring seat 10, wherein the lower spring seat 10 is arranged at the rear end of the lower ball seat 2 and sleeved in the lower piston 5, and the lower spring 9 is positioned between the lower ball seat 2 and the lower spring seat 10.
In the above embodiment, it is preferable that the upper piston 4 is provided with a first liquid outlet 11, the lower piston 5 is provided with a second liquid outlet 12, the first liquid outlet 11 is located at the front end of the clearance ring, and the second liquid outlet 12 is located at the rear end of the clearance ring. The first drain 11 and the second drain 12 are used to drain liquid from the formation into the shear ball valve.
In the above embodiment, it is preferable that a notch 303 (see fig. 4) is provided on the ball valve 3 on the side perpendicular to the through hole 301, and when the ball valve 3 is closed and the cable or the oil pipe is sheared, the notch 303 is caught on the cable or the oil pipe to straighten the cable or the oil pipe.
In the above embodiment, the notch 303 is preferably in a horn shape.
In the above embodiment, the present invention preferably further includes a connection ring 13, and the upper piston 4 and the lower piston 5 are connected through the connection ring 13, specifically, the connection ring is sleeved at the connection position of the upper piston 4 and the lower piston 5, and fixed at both ends by using screws 14.
The torsion lug structure is shown in fig. 5, the fixing ring structure is shown in fig. 6, the lower ball seat structure is shown in fig. 7, the upper ball seat structure is shown in fig. 8, the lower piston structure is shown in fig. 9, the upper piston structure is shown in fig. 10, and the lower spring seat structure is shown in fig. 11.
In addition, as shown in FIG. 12, the ball valve 3 has a sealing function after being closed, can bear pressure, and due to the structural design of springs at two ends of the ball valve, when the ball valve is sealed, the upper end of a sealing surface is pressed, the ball valve axially moves, and the lower spring is compressed, so that a pump through channel is formed. Wherein the pump-through function is similar to a check valve, namely, liquid can pass through when liquid is pumped from front to back, and liquid cannot pass through when liquid is pumped from back to front.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.