Large-diameter plug-in float collar easy to drill

Abstract

The utility model discloses a large-caliber plug-in type easy-to-drill float collar, which relates to the technical field of well cementation operation tools, and comprises a shell, a filling body, a check valve and a socket, the check valve comprises a valve shell, and a valve core is movably arranged at a port on the inner side of the valve shell; the supporting beam is fixedly arranged at the end, away from the valve element, in the valve shell, the supporting beam is in threaded connection with an adjusting rod, and a valve element spring is arranged between the adjusting rod and the valve element. According to the check valve, the supporting beam and the adjusting rod are arranged in the check valve of the float collar, the valve element spring and the valve element can be supported, meanwhile, the effect of adjusting the initial compression amount of the valve element spring can be achieved, the valve element spring does not need to be wholly replaced when the valve element is not tightly attached to the inner wall of the valve shell due to looseness of the valve element spring, and the cost is reduced. When the check valve is used, only the position of the adjusting rod needs to be adjusted to further extrude the valve element spring, operation is easy and convenient, meanwhile, functionality of the check valve is increased, and use of the check valve better meets work requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cementing operation tool, especially relates to a large diameter insert type easy-to-drill float collar. BACKGROUND

[0002] In the process of oil drilling, first, exploration, drilling, drilling is completed, and then the oil casing is lowered into the oil well, and then the gap between the inner wall of the oil well and the outer wall of the oil casing is poured with cement slurry, which prevents the backflow of cement, and the lower end of the casing is provided with a float shoe, a float collar and other tools.

[0003] In the prior art, the float collar mainly comprises an outer shell, a filler, a one-way valve and a socket, and the one-way valve mainly provides elastic thrust for the valve core through an elastic reset mechanism, so that the one-way valve realizes sealing in one direction, but the initial pre-tightening force of the elastic reset mechanism in the one-way valve of the float collar cannot be adjusted, and after being used for many times, the elastic reset mechanism is prone to relaxation due to elastic fatigue, which causes the valve core and the valve port to be not tightly closed, affects the sealing of one-way sealing, and the elastic reset mechanism with elastic fatigue is not convenient to replace, thereby affecting the use effect of the one-way valve in the float collar, therefore, the present application provides a large diameter insert type easy-to-drill float collar. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a large diameter insert type easy-to-drill float collar to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a large diameter insert type easy-to-drill float collar, comprising an outer shell, a filler, a one-way valve and a socket, the one-way valve comprises:

[0006] A valve shell is movably provided with a valve core at the inner side port;

[0007] A support beam is fixedly arranged at the end of the valve shell away from the valve core, a adjusting rod is threadedly connected to the support beam, and a valve core spring is arranged between the adjusting rod and the valve core.

[0008] Preferably, annular grooves are formed in the opposite sides of the adjusting rod and the valve core, and the two ends of the valve core spring are movably embedded in the annular grooves of the end faces of the adjusting rod and the valve core.

[0009] Preferably, a connecting sliding hole is formed in the middle of the adjusting rod to communicate the two ends of the adjusting rod, a valve core shaft is slidably inserted into the valve core spring, one end of the valve core shaft is fixedly connected to the end face of the valve core, and the other end of the valve core shaft slidably extends into the connecting sliding hole.

[0010] Preferably, a nut seat is fixedly embedded in the middle of the support beam, and the inner wall of the nut seat is threadedly connected to the outer wall of the adjusting rod.

[0011] Preferably, the adjusting rod is provided with a hexagonal recess inwardly recessed on the side away from the valve core, and the hexagonal recess is communicated with the connecting sliding hole.

[0012] Preferably, the valve core is fixedly inserted into the valve shell near one end of the valve core, and the filling body is fixedly arranged inside the shell and wraps the single-way valve and the outer wall of the socket.

[0013] Compared with the prior art, the technical effects of the utility model are:

[0014] The utility model discloses a supporting beam and adjusting rod are arranged in the single-way valve of the float joint, which can not only support the valve core spring and the valve core, but also can adjust the initial compression amount of the valve core spring, so that when the valve core spring is loose and the valve core and the inner wall of the valve shell are not close enough, the valve core spring does not need to be replaced, and only the position of the adjusting rod needs to be adjusted to further press the valve core spring, which is simple and convenient, and can increase the functionality of the single-way valve and meet the working requirements. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front sectional view structural schematic diagram of the utility model.

[0016] Figure 2 It is a front sectional view structural schematic diagram of the valve piece of the utility model.

[0017] Figure 3 It is a front sectional view structural schematic diagram of the adjusting rod of the utility model.

[0018] Figure 4 It is a back sectional view structural schematic diagram of the adjusting rod of the utility model.

[0019] In the drawing: 100, shell;200, filling body;300, single-way valve;301, valve shell;302, valve core;303, valve core shaft;304, valve core spring;305, supporting beam;306, adjusting rod;307, nut seat;308, connecting sliding hole;309, hexagonal recess;310, annular recess;400, socket. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] The utility model provides a Figures 1-4The large-diameter plug-in easy-drilling float collar shown includes a shell 100, a filler body 200, a one-way valve 300, and a socket 400. The valve core 302 is fixedly connected to the valve shell 301 near one end of the valve core 302. The filler body 200 is fixedly arranged inside the shell 100 and wraps the outer wall of the one-way valve 300 and the socket 400. The composition and principle of the shell 100, the filler body 200, the one-way valve 300, and the socket 400 in the float collar can refer to the large-diameter plug-in easy-drilling float collar package disclosed in the utility model patent with the publication number CN213775315U. Since the use of the float collar has become a known technology, it will not be described here. The one-way valve 300 includes a valve shell 301 and a support beam 305. The valve core 302 is movably arranged at the inner side port of the valve shell 301. The support beam 305 is fixedly arranged at the end of the valve shell 301 away from the valve core 302. The support beam 305 is threadedly connected with an adjusting rod 306. A nut seat 307 is fixedly embedded in the middle of the support beam 305. The inner wall of the nut seat 307 is threadedly connected with the outer wall of the adjusting rod 306. A valve core spring 304 is arranged between the adjusting rod 306 and the valve core 302. Since the adjusting rod 306 is threadedly connected with the nut seat 307 fixedly arranged on the support beam 305, the adjusting rod 306 can move towards or away from the valve core 302 when it is rotated clockwise or counterclockwise, thereby adjusting the position of the adjusting rod 306. By changing the initial distance between the adjusting rod 306 and the valve core 302, the initial compression amount of the valve core spring 304 can be adjusted. The elastic pushing force provided by the valve core spring 304 for the valve core 302 can ensure that the valve core 302 is tightly attached to the inner wall port of the valve shell 301. This can ensure that the valve core 302 blocks and seals the one-way movement of the fluid in the valve shell 301. When the valve core spring 304 is elastic fatigue, the distance between the adjusting rod 306 and the valve core 302 can be further adjusted by further adjusting the position of the adjusting rod 306 to further compress the valve core spring 304. This can continue to ensure the stability of the elastic support of the valve core spring 304 for the valve core 302, thereby avoiding the need to replace the valve core spring 304 as a whole. This not only prolongs the service life of the valve core spring 304, but also reduces costs.

[0022] Further, annular grooves 310 are formed on opposite sides of the adjusting rod 306 and the valve core 302. The two ends of the valve core spring 304 are movably embedded in the annular grooves 310 on the end faces of the adjusting rod 306 and the valve core 302. The annular grooves 310 allow the ends of the valve core spring 304 to be embedded in the opposite sides of the adjusting rod 306 and the valve core 302. This provides a stable mounting point for the valve core spring 304, preventing the ends of the valve core spring 304 from being easily offset when mounted on the end faces of the adjusting rod 306 or the valve core 302. This not only improves the stability of the valve core spring 304 installation, but also makes the installation position of the valve core spring 304 more accurate, improving the convenience and quality of assembly.

[0023] In addition, the middle part of the adjusting rod 306 is provided with a connecting sliding hole 308 communicating both ends of the adjusting rod 306, the inside of the valve core spring 304 is slidingly inserted with a valve core shaft 303, one end of the valve core shaft 303 is fixedly connected with the end face of the valve core 302, the other end of the valve core shaft 303 slidingly extends into the connecting sliding hole 308, by providing the connecting sliding hole 308 communicating both ends in the middle part of the adjusting rod 306, and by sliding the valve core shaft 303 in the connecting sliding hole 308, the forming direction of the valve core spring 304 can be limited and guided, so that the direction of the elastic pushing force provided by the valve core spring 304 for the valve core 302 is more accurate and stable; the length of the valve core shaft 303 is smaller than the distance between the valve core 302 and the support beam 305, so that after the adjusting rod 306 is disassembled from the nut seat 307, the valve core spring 304 can be pulled out from the outer wall of the valve core shaft 303 for disassembly, the valve core spring 304 is pulled out from the position in the inner cavity of the nut seat 307, so that the replacement of the valve core spring 304 is facilitated, and the replacement operation of the valve core spring 304 in the valve housing 301 is more convenient; the side of the adjusting rod 306 away from the valve core 302 is provided with an inwardly recessed hexagonal groove 309, the hexagonal groove 309 is communicated with the connecting sliding hole 308, the provision of the hexagonal groove 309 can facilitate the user to insert a wrench or the like into the hexagonal groove 309 to drive the adjusting rod 306 to rotate, so that the convenience of rotating the adjusting rod 306 to realize position adjustment is increased.

[0024] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A large-diameter insert-type easy-drill floating hoop, comprising a shell (100), a filler (200), a flow valve (300), and a socket (400), characterized in that, The one-way valve (300) includes: A valve housing (301) is provided with a valve core (302) at the inner port of the valve housing (301); A support beam (305) is fixedly installed inside the valve housing (301) at the end away from the valve core (302). An adjusting rod (306) is threadedly connected to the support beam (305), and a valve core spring (304) is provided between the adjusting rod (306) and the valve core (302).

2. The large-diameter insert-type easy-drill floating hoop according to claim 1, characterized in that, The adjusting rod (306) and the valve core (302) are provided with annular grooves (310) on opposite sides, and the two ends of the valve core spring (304) are respectively movably embedded in the annular grooves (310) on the end faces of the adjusting rod (306) and the valve core (302).

3. The large-diameter insert-type easy-drill floating hoop according to claim 1, characterized in that, The middle part of the adjusting rod (306) is provided with a connecting slide hole (308) connecting the two ends of the adjusting rod (306). The valve core spring (304) is slidably inserted with a valve core shaft (303). One end of the valve core shaft (303) is fixedly connected to the end face of the valve core (302), and the other end of the valve core shaft (303) slides into the connecting slide hole (308).

4. The large-diameter insert-type easy-drill floating hoop according to claim 1, characterized in that, A nut seat (307) is fixedly embedded in the middle of the support beam (305), and the inner wall of the nut seat (307) is threadedly connected to the outer wall of the adjusting rod (306).

5. A large-diameter insertable easy-drill floating hoop according to claim 3, characterized in that, The adjusting rod (306) has an inwardly recessed hexagonal groove (309) on the side away from the valve core (302), and the hexagonal groove (309) is connected to the connecting slide hole (308).

6. A large-diameter insert-type easy-drill floating hoop according to claim 5, characterized in that, The valve core (302) is fixedly inserted into one end of the valve housing (301) near the valve core (302), and the filler (200) is fixedly disposed inside the outer shell (100) and wraps the outer wall of the flow valve (300) and the socket (400).

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