CN113006699A

CN113006699A - Novel oil drilling reaming structure

Info

Publication number: CN113006699A
Application number: CN202011436161.7A
Authority: CN
Inventors: 吴剑; 夏惠惠; 翟小珍; 代启飞
Original assignee: Suzhou Anenjie Tools Co ltd
Current assignee: Suzhou Anenjie Tools Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-06-22

Abstract

The application discloses novel oil drilling reaming structure, including coaxial coupling in the cylindricality body at drilling rod top, cylindricality body axle center is formed with first logical chamber, first logical chamber axle center from top to bottom coaxial coupling has center tube and piston cylinder in proper order, the center tube axle center is formed with the second and leads to the chamber, the laminating is provided with the cylindricality piston in the piston cylinder, the center tube outside is close to bottom department seal cover and is equipped with the pushing piston, the pushing piston bottom extends to the piston cylinder, pushing piston inner wall with form the backward flow chamber between the piston cylinder outer wall, the piston cylinder lateral wall be formed with communicate its inner chamber and the first backward flow hole in backward flow chamber. The invention has the advantage that the central fluid is changed to drive the pushing piston so as to extend and retract the blade.

Description

Novel oil drilling reaming structure

Technical Field

The application relates to petroleum drilling, in particular to a novel petroleum drilling reaming structure.

Background

The task of drilling a borehole from the surface using mechanical equipment or manual labor is known as drilling. Generally refers to the engineering of drilling boreholes and large diameter water-supply wells for the exploration or exploitation of liquid and gaseous minerals such as oil, gas, and the like. The application of well drilling in national economic construction is extremely wide.

Disclosure of Invention

The invention aims to provide a novel oil drilling reaming structure.

In order to achieve the above object, the present invention provides the following technical solutions.

The embodiment of the application discloses a novel oil drilling reaming structure, which comprises a cylindrical body coaxially connected to the top of a drill rod, wherein a first through cavity is formed in the axis of the cylindrical body, a central pipe and a piston cylinder are sequentially and coaxially connected to the axis of the first through cavity from top to bottom, a second through cavity is formed in the axis of the central pipe, a cylindrical piston is arranged in the piston cylinder in a fitting manner, a pushing piston is arranged on the outer side of the central pipe close to the bottom of the central pipe in a sealing manner, the bottom of the pushing piston extends to the piston cylinder, a backflow cavity is formed between the inner wall of the pushing piston and the outer wall of the piston cylinder, a first backflow hole communicated with the inner cavity of the piston cylinder and,

when the cylindrical piston is located at a first position, the second through cavity is communicated with the first backflow hole;

the cylindrical piston blocks the first return orifice when the cylindrical piston is in the second position,

the top of the pushing piston is provided with blades arranged in the circumferential direction of the cylindrical body, a sliding groove extending to the oblique upper side of the outer side is formed in the cylindrical body, the blades slide in the sliding groove in a fitting manner, and when the pushing piston moves upwards, the blades are pushed to extend upwards in an oblique manner.

Preferably, in the novel oil drilling reaming structure, the central pipe and the piston cylinder are connected through an upper central shaft.

Preferably, in the novel oil drilling reaming structure, the outer wall of the piston cylinder seals the first through cavity below the first backflow hole.

Preferably, in the novel oil drilling reaming structure, a second retaining ring is arranged between the pushing piston and the blade, and a fixed clamping seat is arranged at the bottom of the second retaining ring.

Preferably, in the novel oil drilling reaming structure, a compression spring is arranged at the top of the blade, and the compression spring pushes the blade to retract downwards in an inclined mode.

Preferably, in the novel oil drilling reaming structure, a third retaining ring is arranged between the compression spring and the blade.

Preferably, in the above-mentioned novel oil drilling reaming structure, the compression spring is sleeved outside the central tube, and a spring protection tube is arranged outside the compression spring.

Preferably, in the novel oil drilling reaming structure, the top of the spring protection pipe is fixedly installed on an upper fixing seat through threads, the upper fixing seat is fixedly installed on the inner wall of the first through cavity, and an adjusting gap is formed between the bottom of the spring protection pipe and the top of the third retainer ring.

Preferably, in the novel oil drilling reaming structure, a water hole communicated with the backflow cavity is formed in the side wall of the cylindrical body, the water hole extends towards the action direction of the blade, and when the pushing piston moves upwards, the water hole is communicated with the water hole; when the pushing piston moves downwards, the pushing piston shields the water hole.

Compared with the prior art, the invention has the advantages that the central fluid is changed to drive the pushing piston, so that the blade is extended and retracted.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an initial schematic view of a novel oil well reaming configuration in accordance with an embodiment of the present invention;

FIG. 2 is an enlarged view of section A of FIG. 1;

FIG. 3 is a schematic view of the novel oil drilling reaming configuration of the present invention prior to the ball drop disengaging the pawl spring in an embodiment of the present invention;

FIG. 4 is an enlarged view of section B of FIG. 3;

FIG. 5 is a schematic view of the novel oil drilling reaming configuration with the drop ball disengaged from the pawl spring in an embodiment of the present invention;

FIG. 6 is an enlarged view of section C of FIG. 5;

FIG. 7 is an enlarged view of section D of FIG. 5;

FIG. 8 is an enlarged view of section E of FIG. 5;

fig. 9 is a perspective view of a cylindrical piston in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

With reference to fig. 1-9, the novel oil drilling reaming structure 100 is mainly implemented by a flow-changing structure and a blade assembly for oil drilling reaming:

the novel flow-changing structure for the oil drilling reamer mainly changes the flow of the central fluid to drive the pushing piston so as to extend and retract the blades.

The novel oil drilling reaming diversion structure comprises a cylindrical body 101 coaxially connected to the top of a drill rod, a first through cavity 102 is formed in the axis of the cylindrical body 101, a central pipe 103, a piston cylinder 104 and the central pipe 103 are sequentially and coaxially connected in the first through cavity 102 from top to bottom, the axle center of the piston cylinder 104 is respectively provided with a second through cavity 105 and a third through cavity 121 which are communicated with each other, a cylindrical piston 106 is arranged in the third through cavity 121 in a fitting and rotating mode, a fourth through cavity 122 communicated with the third through cavity 121 is formed in the axle center of the cylindrical piston 106, a backflow cavity 108 is formed between the outer wall of the piston cylinder 104 and the inner wall of the cylindrical body 101, a plurality of first backflow holes 109 communicated with the backflow cavity 108 are uniformly distributed in the inner wall of the third through cavity 121 along the circumferential direction, second backflow holes 123 which are in one-to-one correspondence with the first backflow holes 109 are distributed in the inner wall of the fourth through cavity 122, and when the cylindrical piston 106 rotates, the first backflow holes 109 are communicated or not communicated with the second backflow.

In the technical scheme, through the movement of the cylindrical piston, the two backflow holes are communicated or not communicated, and when the backflow holes are communicated, fluid can rush to the backflow cavity so as to drive the piston to be pushed to the top of the backflow cavity and push the blade to extend out; when not connected, the piston is pushed to automatically move downwards, namely the blade is retracted. This technical scheme can just drive the cylindricality piston and rotate when needs the wing knife stretches out, and when not needing, continue to drive the cylindricality piston and rotate, can realize stretching out and retrieving of the wing knife that can not stop, can realize reaming or not reaming in the different positions of underground. Compared with the common product which can only realize one reaming and recovery action, the technical scheme has obvious advantages.

Furthermore, the outer wall of the cylindrical piston 106 is circumferentially provided with V-shaped grooves 124 which are communicated end to end, the inner wall of the third through cavity 121 is provided with balls 125 which are attached to and roll in the V-shaped grooves 124, and a central angle formed by two adjacent second backflow holes 123 is equal to a central angle formed by two V-shaped grooves 124.

Among this technical scheme, during concrete operation, the cylindricality piston is because the outside sets up V word groove, and the central angle that two V word grooves 124 formed just equals the central angle that two adjacent second backward flow holes 123 formed, drives cylindricality piston promptly and rotates a V word groove, realizes two backward flow hole intercommunications, rotates a V word groove again, realizes two backward flow hole dislocation not intercommunications to whether this incessantly realizes the backward flow intracavity and has fluid impact, realizes stretching out and retrieving of wing promptly. It should be noted that, the technical solution adopts a V-shaped groove, which can be realized by adopting an S-shaped groove, and only needs to realize the rotation of the cylindrical piston while moving vertically, which all belong to the scope of the present application.

Furthermore, a pawl spring 126 is extended from the inner wall of the fourth through cavity 122 near the bottom, a drop ball 127 is received in the pawl spring 126, and the drop ball 127 drives the pawl spring 126 to move downwards and simultaneously drives the cylindrical piston 106 to move according to an inclined edge of the V-shaped groove 124. A second compression spring 128 is sleeved outside the pawl spring 126 in the fourth passage cavity 122, and the second compression spring 128 pushes the cylindrical piston 106 to return according to the other oblique edge of the V-shaped groove 124.

In the technical scheme, during specific operation, the falling ball drives the cylindrical piston to rotate, and when falling, the falling ball drives the pawl spring to move downwards, so that the cylindrical piston is driven to rotate while moving downwards, namely to move along one side of the V-shaped groove; when the falling ball is separated from the claw spring, the cylindrical piston rebounds due to the action of the compression spring and moves from the other side of the V-shaped groove, namely, the cylindrical piston ascends and rotates simultaneously, so that the V-shaped groove moves, namely, the falling ball falls, the cylindrical piston rotates one V-shaped groove, namely, two backflow holes are communicated, then one falling ball is lost, the cylindrical piston rotates one V-shaped groove again, and the two backflow holes are not communicated in a staggered mode. The ball is dropped ceaselessly to realize the communication or non-communication between the two backflow holes, and whether the backflow cavity is impacted by fluid or not is realized ceaselessly, namely, the extension and the recovery of the blade are realized. It should be noted that the falling ball is preferably used, but not limited to, and it is understood that other falling objects, such as a cylindrical object, can be used to move the cylindrical piston downward, and shall fall within the scope of the present application.

Further, a steering bearing 129 is disposed between the cylindrical piston 106 and the second compression spring 128, and a first retainer ring 130 is disposed between the steering bearing 129 and the second compression spring 128.

In the technical scheme, the cylindrical piston needs to rotate in the process of continuously moving up and down, and other parts cannot be influenced when the cylindrical piston rotates under the action of the steering bearing; because the force is bigger during the falling process of the falling ball, the steering bearing is prevented from being damaged by the protection of the first retaining ring.

Further, the pawl spring 126 is disposed inside the first sleeve 131 in a fitting manner, and the inner diameter of the first sleeve 131 is gradually increased after being leveled from top to bottom.

In the technical scheme, during specific operation, the claw spring is required to catch the falling ball so that the falling ball drives the claw spring and the cylindrical piston to move downwards, so that the V-shaped groove can move, the first sleeve pipe is used for realizing that the falling ball cannot be separated from the claw spring due to the clamping effect of the first sleeve pipe at the upper section with the flat inner diameter of the first sleeve pipe, so that the falling ball drives the claw spring to move downwards, and the cylindrical piston moves downwards; when moving to first sleeve pipe lower part, because the internal diameter grow, the claw spring can't effectively catch the ball that falls, and the ball that falls drops loses power down, and the second compression spring pushes up the cylindricality piston, pushes away to the cylindricality piston and supports and hold in the piston cylinder inner wall. It should be noted that, the section of the first sleeve with the gradually increasing inner diameter can be directly cancelled, and only the holding section needs to be reserved to clamp the falling ball for a certain distance.

Further, the outer wall of the first sleeve 131 is fixed to the inner wall of the spindle seat 132, the bottom of the second compression spring 128 is supported on the top of the spindle seat 132, and the outer wall of the spindle seat 132 is fixedly mounted on the inner wall of the second sleeve 133. The outer wall of the piston cylinder 104 is sealed to the inner wall of the second sleeve 133 below the first return hole 109, and the outer wall of the second sleeve 133 is sealed and fixed to the inner wall of the first through cavity 102.

In the technical scheme, the piston cylinder and other internal components can be installed in advance through the first sleeve and then are installed in the first through cavity in a unified mode, and installation of the components is facilitated.

Further, a fifth through cavity 134 is formed at the axis of the mandrel seat 132, the inner diameter of the bottom of the fifth through cavity 134 is smaller than the diameter of the falling ball 127, and a side wall hole 135 communicated with the first through cavity 102 is formed on the side wall of the fifth through cavity 134.

In the technical scheme, when two backflow holes are communicated, fluid is required to impact in the backflow cavity, so that the downward flowing space of the fluid needs to be compressed, after a falling ball falls down, the bottom hole is blocked, and a part of fluid flows out of the side wall hole and continues to fall into the first through cavity.

Furthermore, a pushing piston 107 is arranged on the outer side of the central tube 103 close to the bottom in a sealing manner, the bottom of the pushing piston 107 extends to the piston cylinder 104, a backflow cavity 108 is formed between the inner wall of the pushing piston 107 and the outer wall of the piston cylinder 104, blades 110 are arranged on the top of the pushing piston 107 in a row along the circumferential direction of the cylindrical body 101, a sliding groove 111 extending obliquely upward to the outer side is formed in the cylindrical body 101, the blades 110 are attached to and slide on the sliding groove 111, and when the piston 107 is pushed to move upward, the pushing blades 110 extend obliquely upward.

In the technical scheme, the blades are slidably mounted in the sliding grooves in a fitting mode, and when the piston is pushed to move upwards under the internal stress, the blades are driven to slide upwards and obliquely outwards, the blades are stretched out, and reaming operation is achieved.

Further, the central tube 103 and the piston cylinder 104 are connected by an upper mandrel 112.

In the technical scheme, the upper mandrel is in transition connection, so that the installation is convenient and the piston cylinder can be protected.

Further, the piston cylinder 104 outer wall seals the first through cavity 102 below the first return orifice 109.

In the technical scheme, the bottom of the backflow cavity needs to be sealed, otherwise, the fluid flows downwards and cannot impact reversely to push the piston.

Further, a second blocking ring 113 is disposed between the pushing piston 107 and the blade 110, and a fixed clamping seat 114 is disposed at the bottom of the second blocking ring 113.

In the technical scheme, the installation is required, the installation is convenient and the stability of the equipment is improved.

Further, a first compression spring 115 is disposed on the top of the blade 110, and the first compression spring 115 pushes the blade 110 to retract obliquely downward.

In this technical scheme, after pushing away the piston and losing power, first compression spring compresses the sword wing downwards along the spout and withdraws.

Further, a third blocking ring 116 is disposed between the first compression spring 115 and the blade 110.

Further, the first compression spring 115 is sleeved outside the central tube 103, and a spring protection tube 117 is disposed outside the first compression spring 115.

Among this technical scheme, be used for the protection spring, prevent card and die and damage.

Further, the top of the spring protection tube 117 is fixedly mounted on the upper fixing seat 118 through threads, the upper fixing seat 118 is fixedly mounted on the inner wall of the first through cavity 102, and an adjusting gap 119 is formed between the bottom of the spring protection tube 117 and the top of the third retainer ring 116.

Among this technical scheme, the biggest distance that stretches out of wing depends on between spring pillar and the third fender ring apart from, and this distance has decided the wing and has moved up the distance at utmost, has decided the distance of stretching out promptly, so can just can adjust the length that the wing stretches out through the screw thread distance between adjusting spring pillar and the last fixing base.

Furthermore, a water hole 120 communicated with the backflow cavity 108 is formed in the side wall of the cylindrical body 101, the water hole 120 extends towards the action direction of the blade 110, and when the piston 107 is pushed to move upwards, the water hole 120 is communicated with the water hole 120; when the push piston 107 moves downwards, the push piston 107 shields the water hole 120.

In the technical scheme, the water hole is used for flushing water, cooling and removing chips when the cutter blade is reamed, so that the cutter blade is protected. And the fluid in the water hole comes from the reflux cavity, so that the structure is compact and reasonable.

It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims

1. A novel oil drilling reaming structure is characterized by comprising a cylindrical body coaxially connected to the top of a drill rod, wherein a first through cavity is formed in the axis of the cylindrical body, a central pipe and a piston cylinder are sequentially and coaxially connected to the axis of the first through cavity from top to bottom, a second through cavity is formed in the axis of the central pipe, a cylindrical piston is arranged in the piston cylinder in a fitting manner, a pushing piston is arranged on the outer side of the central pipe close to the bottom in a sealing manner, the bottom of the pushing piston extends to the piston cylinder, a backflow cavity is formed between the inner wall of the pushing piston and the outer wall of the piston cylinder, a first backflow hole communicated with the inner cavity of the piston cylinder and the backflow cavity is formed in the,

2. The novel oil well reaming structure of claim 1, wherein the center tube and the piston cylinder are connected by an upper mandrel.

3. The novel oil drilling reaming structure of claim 1, wherein the piston cylinder outer wall seals the first through cavity below the first flowback bore.

4. The novel oil drilling reaming structure as claimed in claim 1, wherein a second retaining ring is arranged between the pushing piston and the blade, and a fixing clamping seat is arranged at the bottom of the second retaining ring.

5. The novel oil well drilling reaming structure of claim 1, wherein the top of the blade is provided with a compression spring which pushes the blade to retract obliquely downwards.

6. The novel oil well reaming structure of claim 5, wherein a third retainer ring is disposed between the compression spring and the blades.

7. The novel oil drilling reaming structure of claim 6, wherein the compression spring is sleeved outside the central pipe, and a spring protection pipe is arranged outside the compression spring.

8. The novel oil drilling reaming structure of claim 7, wherein the top of the spring protection tube is fixedly installed on an upper fixed seat through threads, the upper fixed seat is fixedly installed on the inner wall of the first through cavity, and an adjusting gap is formed between the bottom of the spring protection tube and the top of the third retainer ring.

9. The novel oil drilling reaming structure as claimed in claim 1, wherein the side wall of the cylindrical body is formed with a water hole communicated with the backflow cavity, the water hole extends towards the action direction of the blade, and when the pushing piston moves upwards, the water hole is communicated with the water hole; when the pushing piston moves downwards, the pushing piston shields the water hole.