CN210422569U

CN210422569U - Drilling tool float valve with good sealing effect

Info

Publication number: CN210422569U
Application number: CN201921573951.2U
Authority: CN
Inventors: 徐萌; 杜野; 许超宇; 孙华; 张帆; 金贵全; 郭晓寒
Original assignee: HEILONGJIANG NORTH SHUANGJIA DRILLING TOOLS CO Ltd
Current assignee: HEILONGJIANG NORTH SHUANGJIA DRILLING TOOLS CO Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-04-28
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a sealed effectual drilling tool float valve, including casing and slider, the casing top outside is provided with first sealing washer, and both sides have seted up the opening around the casing bottom, inside connecting piece and the sealing base of being provided with of casing, and the connecting piece setting is in the sealing base top, first spout has been seted up to the connecting piece inboard, and inside spring and the slide bar of being provided with of first spout, the slide bar upper end is connected with the spring upper end, and the slide bar lower extreme is connected with the case top. This sealed effectual drilling tool float valve is provided with connecting piece, slide bar and slider, and rebound mechanism sets up in the case top, increases the area of contact of case bottom and backwash liquid, and the backwash liquid of being convenient for promotes the case, makes the second sealing washer laminating sealing base of case outer end, and the case is the round platform form, and when backwash liquid pressure increased, promotion case upwards slides, makes case and second sealing washer and sealing base's being connected inseparabler.

Description

Drilling tool float valve with good sealing effect

Technical Field

The utility model relates to a drilling tool floating valve technical field specifically is a sealed effectual drilling tool floating valve.

Background

In the drilling process of an oil well, because the underground stratum structure is complex and the pressure born by each stratum is different, in order to cut off a return flow channel and prevent accidents such as blowout and the like, a drilling tool floating valve is needed.

The current drilling tool float valve is low to the reflux pressure utilization ratio, and the area of contact of case and base is little, makes the whole sealed effect of drilling tool float valve poor, and current drilling tool float valve resets through single spring, but the operational environment of drilling tool float valve is poor, and the corrosivity of drilling fluid is strong, and the easy corrosion damages spring, and the drilling tool float valve that relies on single spring thoroughly damages easily, and the reliability is low in the use, to above-mentioned problem, needs to improve current equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealed effectual drilling tool float valve, current drilling tool float valve to the backward flow pressure utilization ratio low to solving and proposing among the above-mentioned background art, and the area of contact of case and base is little, make the whole sealed effect of drilling tool float valve poor, and current drilling tool float valve resets through single spring, but the operational environment of drilling tool float valve is poor, the corrosivity of drilling fluid is strong, the easy corrosion damage spring, the drilling tool float valve that relies on single spring thoroughly damages easily, the problem that the reliability is low is got up in the use.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a sealed effectual drilling tool float valve, includes casing and slider, the casing top outside is provided with first sealing washer, and both sides have seted up the opening around the casing bottom, inside connecting piece and the sealing base of being provided with of casing, and the connecting piece setting is in the sealing base top, first spout has been seted up to the connecting piece inboard, and inside spring and the slide bar of being provided with of first spout, the slide bar upper end is connected with the spring upper end, and the slide bar lower extreme is connected with the case top, the case sets up inside the sealing base, and is provided with the second sealing washer outside the case, the second spout has been seted up to the casing bottom left and right sides, both ends set up respectively inside a second spout about the slider, and the slider upper end is connected with the case lower.

Preferably, the openings are symmetrically arranged by taking the valve core as a center, and the uppermost ends of the openings and the lowermost end of the sealing base are positioned on the same horizontal plane.

Preferably, the number of the first sliding grooves is four, and the four first sliding grooves are arranged in a cross shape by taking the valve core as a center.

Preferably, the number of the sliding rods and the number of the springs are four, and the sliding rods are connected with the first sliding grooves in a sliding mode.

Preferably, the valve core is narrow at the top and wide at the bottom and is in a circular truncated cone shape, and the valve core and the sealing base form a sealing mechanism through a second sealing ring.

Preferably, the number of the second sliding grooves is two, the two second sliding grooves are symmetrically arranged by taking the valve core as a center, and meanwhile, the second sliding grooves are connected with the sliding block in a sliding manner.

Compared with the prior art, the beneficial effects of the utility model are that: the drilling tool floating valve with good sealing effect,

(1) the valve core is arranged above the valve core, the contact area of the bottom of the valve core and reflux is increased, the reflux can conveniently push the valve core, a second sealing ring at the outer end of the valve core is attached to the sealing base, the valve core is in a round table shape, and when the pressure of the reflux is increased, the valve core is pushed to slide upwards, so that the valve core is more tightly connected with the second sealing ring and the sealing base;

(2) be provided with spring, second spout and slide bar, the mud at case top promotes the case and moves down, breaks away from sealing base until the case, and during mud backward flow, the mud of case bottom promotes the case and moves up, and the spring promotes the case through the slide bar and moves up simultaneously, and single spring cooperation mud pressure can accomplish sealedly, and four springs that the cross set up are more insured, and it is more reliable to use.

Drawings

FIG. 1 is a schematic view of the cross-sectional structure of the present invention;

FIG. 2 is a schematic top view of the cross-sectional structure of the present invention;

FIG. 3 is a schematic view of the structure of the present invention;

fig. 4 is a schematic view of the top-view cross-sectional structure of the slider according to the present invention.

In the figure: 1. the sealing device comprises a shell, 2, a first sealing ring, 3, an opening, 4, a connecting piece, 5, a sealing base, 6, a first sliding groove, 7, a spring, 8, a sliding rod, 9, a valve core, 10, a second sealing ring, 11, a second sliding groove, 12 and a sliding block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a drilling tool float valve with good sealing effect is disclosed, as shown in figure 1, figure 2 and figure 3, a first sealing ring 2 is arranged on the outer side of the top of a shell 1, openings 3 are arranged on the front side and the rear side of the bottom of the shell 1, the openings 3 are symmetrically arranged by taking a valve core 9 as a center, the uppermost end of each opening 3 and the lowermost end of a sealing base 5 are positioned on the same horizontal plane, the valve core 9 is separated from the sealing base 5, the openings 3 enlarge a slurry flow channel, so that slurry above the valve core 9 can flow downwards, a connecting piece 4 and the sealing base 5 are arranged inside the shell 1, the connecting piece 4 is arranged above the sealing base 5, a first sliding groove 6 is arranged on the inner side of the connecting piece 4, a spring 7 and a sliding rod 8 are arranged inside the first sliding groove 6, four first sliding grooves 6 are arranged, the four first sliding grooves 6 are arranged in a cross shape by taking the valve core, slide bar 8 and spring 7 all are provided with four, and the connected mode of slide bar 8 and first spout 6 is sliding connection, the slide bar 8 of being convenient for slides along first spout 6, slide bar 8 upper end is connected with spring 7 upper end, and the slide bar 8 lower extreme is connected with case 9 top, the narrow width is round platform form down on the case 9, and case 9 constitutes sealing mechanism through second sealing washer 10 and seal base 5, the mud of case 9 below pushes away case 9 and upwards slides, make the second sealing washer 10 of case 9 outer end and seal base 5 inner wall laminating fastening.

As shown in fig. 1, 3 and 4, the valve core 9 is disposed inside the sealing base 5, a second sealing ring 10 is disposed outside the valve core 9, second sliding grooves 11 are disposed on the left and right sides of the bottom of the casing 1, two second sliding grooves 11 are disposed, the two second sliding grooves 11 are symmetrically disposed with the valve core 9 as a center, and meanwhile, the second sliding grooves 11 are connected with the sliding block 12 in a sliding manner, so that the sliding block 12 slides along the second sliding grooves 11, the left and right ends of the sliding block 12 are disposed inside one second sliding groove 11, and the upper end of the sliding block 12 is connected with the lower end of the valve core 9.

The working principle is as follows: when the floating valve of the drilling tool with good sealing effect is used, firstly, the floating valve of the drilling tool is placed in a drill rod through a connecting device, so that a first sealing ring 2 at the outer end of the floating valve of the drilling tool is in sealing connection with the inner wall of the drill rod, when drilling fluid is in positive circulation, mud pushes a valve core 9 to move downwards, a sliding block 12 moves downwards along a second sliding groove 11, the sliding rod 8 compresses a spring 7, meanwhile, the sliding rod 8 slides downwards along a first sliding groove 6, the valve core 9 is separated from a sealing base 5, a mud flowing channel is opened, mud slides downwards through an opening 3, when the drilling fluid flows back, the mud pushes the valve core 9 upwards to slide, the sliding block 12 slides upwards along the second sliding groove 11, the spring 7 pushes the sliding rod 8 to slide upwards along the first sliding groove 6, the sliding rod 8 and the sliding block 12 play a supporting role, so that the valve core 9 slides stably, a second sealing ring 10 at the outer end of the valve core 9, the mud pressure under the valve core 9 is increased, the pressure of the valve core 9 on the second sealing ring 10 is increased, and the connection between the second sealing ring 10 and the sealing base 5 is tighter, so that the whole work is completed, and the content which is not described in detail in the specification belongs to the prior art which is well known by a person skilled in the art.

The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a sealed effectual drilling tool float valve, includes casing (1) and slider (12), its characterized in that: the outer side of the top of the shell (1) is provided with a first sealing ring (2), the front side and the rear side of the bottom of the shell (1) are provided with openings (3), a connecting piece (4) and a sealing base (5) are arranged in the shell (1), the connecting piece (4) is arranged above the sealing base (5), the inner side of the connecting piece (4) is provided with a first chute (6), a spring (7) and a sliding rod (8) are arranged in the first chute (6), the upper end of the sliding rod (8) is connected with the upper end of the spring (7), the lower end of the sliding rod (8) is connected with the top end of a valve core (9), the valve core (9) is arranged in the sealing base (5), the outer side of the valve core (9) is provided with a second sealing ring (10), the left side and the right side of the bottom of the shell (1) are provided with second chutes (11), the left end and the, and the upper end of the slide block (12) is connected with the lower end of the valve core (9).

2. The well-sealed floating valve of drilling tool as claimed in claim 1, wherein: the opening (3) is symmetrically arranged by taking the valve core (9) as a center, and the uppermost end of the opening (3) and the lowermost end of the sealing base (5) are positioned on the same horizontal plane.

3. The well-sealed floating valve of drilling tool as claimed in claim 1, wherein: the number of the first sliding grooves (6) is four, and the four first sliding grooves (6) are arranged in a cross shape by taking the valve core (9) as the center.

4. The well-sealed floating valve of drilling tool as claimed in claim 1, wherein: the four sliding rods (8) and the four springs (7) are arranged, and the sliding rods (8) are connected with the first sliding grooves (6) in a sliding mode.

5. The well-sealed floating valve of drilling tool as claimed in claim 1, wherein: the valve core (9) is narrow at the top and wide at the bottom and is in a circular truncated cone shape, and the valve core (9) and the sealing base (5) form a sealing mechanism through a second sealing ring (10).

6. The well-sealed floating valve of drilling tool as claimed in claim 1, wherein: the number of the second sliding grooves (11) is two, the two second sliding grooves (11) are symmetrically arranged by taking the valve core (9) as a center, and meanwhile the second sliding grooves (11) are connected with the sliding block (12) in a sliding mode.