CN118128454A

CN118128454A - Self-grouting while-drilling check valve

Info

Publication number: CN118128454A
Application number: CN202410558258.7A
Authority: CN
Inventors: 马恺亮; 李宇婧; 金文哲
Original assignee: MUDANJIANG PETROLEUM TOOLS CO Ltd
Current assignee: MUDANJIANG PETROLEUM TOOLS CO Ltd
Priority date: 2024-05-08
Filing date: 2024-05-08
Publication date: 2024-06-04

Abstract

The invention relates to a check valve field, especially relates to a self-grouting type while-drilling check valve, when the drilling tool connected with the check valve in the prior art enters the well, the mud in the well is extruded along the annular hole, and the drilling string above the check valve has no mud, and the technical problem of the mud supplementing to the drilling tool from time to time includes: the self-grouting valve comprises a body, a control seat, a valve rod, a pin shaft, a valve core, a valve seat, a grouting track, an inclined plane track, a check track and a spring, wherein the pin shaft is regulated to the bottom of the grouting track when the drill string enters a well, the valve core and the valve seat are not closed at the moment, mud returns to the drill string above the valve along the opened valve, the self-grouting purpose is realized, when the mud reaches a preset position, the pump is started to circulate in a large displacement mode, the mud flow overcomes the resistance of the spring, the pin shaft is rotated to the tail end of the inclined plane track and the head end of the check track, the pump is stopped at the moment or the circulation displacement is controlled to be smaller than the spring force, the pin shaft enters the check track, and the valve core and the valve seat are sealed and closed to be consistent with a conventional check valve.

Description

Self-grouting while-drilling check valve

Technical Field

The invention relates to the field of check valves, in particular to a self-grouting while-drilling check valve.

Background

While-drilling check valves are one of the necessary tools for drilling, and are typically attached to the drill bit and also to the drill string at the desired location. Is mainly used for preventing the occurrence of the kick or the blowout. Meanwhile, when a single joint is drilled, mud can flow backwards, a large amount of drilling and sand grains enter the drilling tool from the drill bit water hole, and the drill bit water hole and the flow channel are blocked when the pump is started.

The conventional check valve is closed in one direction, when a drilling tool connected with the check valve enters a well, mud in the well is extruded along an annular hole, no mud exists in a drill string above the check valve, and the mud is fed into the drilling tool from time to time, so that the labor intensity and the operation time are increased.

Disclosure of Invention

The invention aims to solve the technical problems that when a drilling tool connected with a check valve in the prior art enters a well, mud in the well is extruded along an annular hole, no mud exists in a drill string above the check valve, and the mud is fed into the drilling tool from time to time, and further provides a self-grouting type while-drilling check valve.

A self-grouting while-drilling check valve, comprising: the body, control seat, the control seat inlays the card in the body inner wall, and the control seat slides there is the valve rod, and the valve rod both ends are connected with round pin axle, case respectively, and the case can be sealed with the disk seat cooperation, and the disk seat inlays the card in the body inner wall, and round pin axle sliding connection is in the track, and the track is located the control seat, and the track includes grout track, inclined plane track, non return track, and the inclined plane track is in middle part both ends and grout track, non return track are linked together, and the spring has been cup jointed at the valve rod middle part.

Further, the control seat includes track board and fixing base, and the track board is located between two fixing bases, and two fixing bases and track board integrated into one piece, and the track is located the track board, and the fixing base inlays the card in the body inner wall.

Further, the sealing surface sheath is slidably connected in the valve seat, the bottom of the sealing surface sheath is limited by the elastic snap spring for the hole, and the elastic snap spring for the hole is embedded in the inner wall of the valve seat.

Further, the upper surface of the valve core is connected with a spring sheath, and the spring is positioned in the spring sheath.

The invention has the beneficial effects that:

When the drill string goes into the well, the pin shaft is regulated to the bottom of the grouting track, at the moment, the valve core and the valve seat are not closed, mud returns to the drill string above the valve along the opened valve, the purpose of self grouting is achieved, when the mud reaches a preset position, the pump is started to circulate in a large displacement mode, the mud flow overcomes the resistance of the spring, the pin shaft is enabled to rotate into the tail end of the inclined plane track and the head end of the check track, at the moment, the pump is stopped or the circulation displacement is controlled to be smaller than the elastic force of the spring, the pin shaft enters the check track, and the valve core and the valve seat are sealed and closed and are consistent with the conventional check valve.

Drawings

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

In the figure: a body 1; a control base 2; a valve stem 3; a pin 4; a valve core 5; a valve seat 6; grouting a rail 7; a bevel track 8; a check rail 9; a spring 10; a track plate 11; a fixed seat 12; a seal face sheath 13; an elastic snap spring 14; spring sheath 15.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The rotating connection in the device means that the bearing is baked on the shaft, a spring retainer ring groove is arranged on the shaft or the shaft hole, and the axial fixation of the bearing is realized by clamping the spring retainer ring in the retainer ring groove, so that the rotation is realized; the hinge is a movable connection mode on the connecting parts such as the hinge, the pin shaft, the short shaft and the like.

The present invention will be described in detail below with reference to the accompanying drawings.

Examples

The following describes a self-grouting while-drilling check valve according to the present embodiment with reference to fig. 1, including: the device comprises a body 1 and a control seat 2, wherein the control seat 2 is embedded and clamped on the inner wall of the body 1, a valve rod 3 is arranged in the control seat 2 in a sliding manner, two ends of the valve rod 3 are respectively connected with a pin shaft 4 and a valve core 5, the valve core 5 can be matched and sealed with a valve seat 6, the valve seat 6 is embedded and clamped on the inner wall of the body 1, the pin shaft 4 is in sliding connection with a track, the track is positioned on the control seat 2 and comprises a grouting track 7, an inclined surface track 8 and a non-return track 9, the inclined surface track 8 is positioned at two ends of the middle part and is communicated with the grouting track 7 and the non-return track 9, and a spring 10 is sleeved at the middle part of the valve rod 3;

Before the drilling string goes into the well, the pin shaft 4 is adjusted to the tail end of the grouting track 7, when the pin shaft 4 is positioned at the tail end of the grouting track 7, the pin shaft 4 drives the valve core 5 to be separated from the valve seat 6 through the valve rod 3, the spring 10 is in a compressed state, after the drilling string goes into the well, mud returns into the drilling string above the valve along the opened valve seat 6, the self-grouting purpose is achieved, after the mud reaches a preset position, the grouting track 7 and the check track 9 are arranged in parallel, the upper end of the check track 9 is positioned above the upper end of the grouting track 7, the pump is started to circulate in a large displacement mode, the mud flow drives the valve core 5 and the valve rod 3 to overcome the resistance of the spring 10, the pin shaft 4 is driven to rotate to move to the tail end of the inclined plane track 8 and the head end of the check track 9, at the moment, the pump stopping or the circulation control displacement is smaller than the spring 10, under the action of the spring 10, after the pin shaft 4 enters the check track 9, the lower end of the check track 9 is positioned below the valve seat 7, the pin shaft 4 moves to the tail end of the check track 9, the valve core 5 is matched and the valve seat 6 is sealed, and is consistent with a conventional check valve.

The control seat 2 comprises a track plate 11 and fixing seats 12, the track plate 11 is positioned between the two fixing seats 12, the two fixing seats 12 and the track plate 11 are integrally formed, the track is positioned in the track plate 11, and the fixing seats 12 are embedded and clamped on the inner wall of the body 1;

The valve seat 6 is connected with a sealing surface sheath 13 in a sliding way, the bottom of the sealing surface sheath 13 is limited by an elastic clamp spring 14 for a hole, and the elastic clamp spring 14 for the hole is embedded in the inner wall of the valve seat 6;

When the valve core 5 and the valve seat 6 are closed, the valve core 5 drives the sealing surface sheath 13 to slide, normal closing is not affected, and when the valve core 5 and the valve seat 6 are disconnected and conducted, the sealing surface sheath 13 protects the sealing surface to prevent erosion.

The upper surface of the valve core 5 is connected with a spring sheath 15, and the spring 10 is positioned in the spring sheath 15;

The spring 10 is protected by a spring sheath 15 to prevent erosion of the spring 10.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A self-grouting while-drilling check valve, characterized in that: comprising the following steps: body (1), control seat (2) inlay card in body (1) inner wall, control seat (2) interior sliding has valve rod (3), valve rod (3) both ends are connected with round pin axle (4) respectively, case (5) can seal with disk seat (6) cooperation, disk seat (6) inlay card in body (1) inner wall, round pin axle (4) sliding connection is in the track, the track is located control seat (2), the track includes grout track (7), inclined plane track (8), non return track (9), inclined plane track (8) are in middle part both ends and grout track (7), non return track (9) are linked together, spring (10) have been cup jointed at valve rod (3) middle part.

2. A self-grouting while drilling check valve as claimed in claim 1, wherein: the control seat (2) comprises a track plate (11) and fixing seats (12), the track plate (11) is located between the two fixing seats (12), the two fixing seats (12) and the track plate (11) are integrally formed, the track is located in the track plate (11), and the fixing seats (12) are embedded and clamped on the inner wall of the body (1).

3. A self-grouting while drilling check valve as claimed in claim 1, wherein: the valve seat (6) is connected with a sealing surface sheath (13) in a sliding mode, the bottom of the sealing surface sheath (13) is limited by an elastic clamp spring (14) for a hole, and the elastic clamp spring (14) for the hole is embedded in the inner wall of the valve seat (6).

4. A self-grouting while drilling check valve as claimed in claim 1, wherein: the upper surface of the valve core (5) is connected with a spring sheath (15), and the spring (10) is positioned in the spring sheath (15).