CN111894465B - Screw drill bit structure for oil development - Google Patents

Abstract

The invention discloses a screw drill bit structure for oil exploitation, which is characterized in that a mounting seat is driven to rotate, so that a gear wheel is contacted with the ground of a well bottom, the gear wheel vibrates up and down in the rotating process and transmits the vibration to an inclined abutting block to drive the inclined abutting block to rotate by taking a central shaft of a connecting rotating shaft as an axis, a hydraulic telescopic rod positioned at the bottom of the inclined abutting block rotates with the inclined abutting block through a guide rotating shaft to drive the hydraulic telescopic rod to stretch between a supporting bottom plate and the inclined abutting block, a return spring positioned on the periphery of the hydraulic telescopic rod abuts against the space between the supporting bottom plate and the inclined abutting block and absorbs the vibration of the inclined abutting block, and therefore the gear wheel is more stable in the rotating process.

Description

Screw drill bit structure for oil development

Technical Field

The invention relates to the field of oil exploitation equipment, in particular to a screw drill bit structure for oil exploitation.

Background

Roller cone drill bits are currently used in hard abrasive formations instead of drag bits, but the disadvantage of such bits in drilling shale and other plastic formations is primarily the bottom mud pocket caused by the hold-down effect, which is exacerbated by the drilling depth and bottom hole pressure and the increase in mud weight. To address this problem, roller cone drill bits have been modified over the years by various bit manufacturers with little success.

Because oil development need contact stereoplasm abrasiveness stratum of well-digging, drag bit can't satisfy the demand of oil well-digging, and it is less to consider that drag bit or fixed cutting tooth drill bit receive the influence in this respect, and people begin to try to combine together two kinds of drill bits, nevertheless because the structure that two kinds of drill bits combine is comparatively concentrated and the stress surface distributes unevenly to cause each part vibration intensity difference easily and damage the drill bit.

Disclosure of Invention

The invention aims to provide a screw drill bit structure for oil extraction, and aims to solve the technical problems that in the prior art, a scraper drill bit or a fixed cutting tooth drill bit is slightly influenced in the aspect, people try to combine the two drill bits, but the combined structure of the two drill bits is concentrated, stress surfaces are not uniformly distributed, so that the drill bits are easily damaged due to different vibration strengths of all parts.

In order to achieve the purpose, the invention adopts a screw drill bit structure for oil exploitation, which comprises a mounting seat, a supporting shaft, a gear wheel and a connecting assembly; the supporting shaft is fixedly connected with the mounting seat and is positioned on one side of the mounting seat, and the cone is rotatably connected with the supporting shaft and is positioned on one side of the supporting shaft, which is far away from the mounting seat; the connecting assembly comprises a middle protruding part, a connecting rotating shaft, an inclined abutting block, a bearing part, a damping component and a guide rotating shaft, the middle protruding part is fixedly connected with the supporting shaft and is positioned on one side of the supporting shaft, which is far away from the mounting seat, the connecting rotating shaft is rotatably connected with the middle protruding part and is positioned on one side of the middle protruding part, which is far away from the supporting shaft, the inclined abutting block is fixedly connected with the connecting rotating shaft, is abutted against the supporting shaft and is positioned on one side of the supporting shaft, which is close to the connecting rotating shaft, the bearing part is fixedly connected with the inclined abutting block, is rotatably connected with the gear wheel and is positioned between the inclined abutting block and the gear wheel, and the guide rotating shaft is fixedly connected with the inclined abutting block, is rotatably connected with the hydraulic telescopic rod and is positioned in the mounting groove; the inclined abutting block is provided with the mounting groove and an arc-shaped bulge, the opening of the mounting groove is positioned at one side of the inclined abutting block close to the supporting shaft, the arc-shaped bulge is positioned at one side of the inclined abutting block close to the mounting groove, the damping component comprises an arc-shaped slide rail, a supporting bottom plate, the hydraulic telescopic rod and a return spring, the arc-shaped slide rail is fixedly connected with the middle bulge piece and matched with the arc-shaped bulge, and is positioned at one side of the supporting shaft close to the arc-shaped bulge, the supporting bottom plate is fixedly connected with the supporting shaft and positioned at one side of the supporting shaft close to the mounting groove, one end of the hydraulic telescopic rod is fixedly connected with the inclined abutting block, the other end of the hydraulic telescopic rod is fixedly connected with the supporting bottom plate and positioned in the mounting groove, and one side of the return spring, and the other side is fixedly connected with the supporting bottom plate and sleeved on the periphery of the hydraulic telescopic rod.

The supporting shaft is provided with a chip groove, the chip groove is located on one side, close to the cone, of the supporting shaft and penetrates through the supporting shaft towards the direction of the mounting seat.

The mounting seat is provided with a containing cavity, and the containing cavity is located inside the mounting seat and communicated with the chip discharge groove.

The screw drill bit structure for oil exploitation further comprises a hydraulic pushing rod, the hydraulic pushing rod is fixedly connected with the mounting seat and located on one side, away from the supporting base plate, of the mounting seat.

According to the screw drill bit structure for oil exploitation, the mounting base is driven to rotate, so that the gear wheel is in contact with the ground of a well bottom, the gear wheel vibrates up and down in the rotating process and transmits the vibration to the inclined abutting block, the inclined abutting block is driven to rotate by taking the central shaft of the connecting rotating shaft as an axis, the hydraulic telescopic rod positioned at the bottom of the inclined abutting block rotates with the inclined abutting block through the guide rotating shaft, the hydraulic telescopic rod is driven to stretch and contract between the supporting bottom plate and the inclined abutting block, the return spring positioned on the periphery of the hydraulic telescopic rod abuts against the space between the supporting bottom plate and the inclined abutting block, and the inclined abutting block is damped, and therefore the gear wheel is more stable in the rotating process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the construction of the connection assembly of the present invention.

Fig. 2 is a schematic structural view of the shock-absorbing member of the present invention.

Fig. 3 is a schematic view of the connection structure of the arc-shaped slide rail and the arc-shaped protrusion of the invention.

Fig. 4 is a schematic view of the internal structure of the mount and the support shaft of the present invention.

In the figure: 1-mounting seat, 2-supporting shaft, 3-gear wheel, 4-connecting component, 5-hydraulic push rod, 11-containing cavity, 21-chip groove, 31-friction bulge, 41-middle bulge piece, 42-connecting rotating shaft, 43-inclined resisting block, 44-bearing piece, 45-damping component, 46-driving motor, 47-guiding rotating shaft, 48-lateral blade, 100-screw drill bit structure for oil exploitation, 431-mounting groove, 432-arc bulge, 451-arc slide rail, 452-supporting bottom plate, 453-hydraulic telescopic rod, 454-return spring and 4511-T-shaped groove.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 4, the present invention provides a screw drill bit structure 100 for oil exploitation, which includes a mounting seat 1, a supporting shaft 2, a cone 3 and a connecting assembly 4; the supporting shaft 2 is fixedly connected with the mounting seat 1 and is positioned on one side of the mounting seat 1, and the cone 3 is rotatably connected with the supporting shaft 2 and is positioned on one side of the supporting shaft 2 away from the mounting seat 1; the connecting assembly 4 comprises a middle protruding part 41, a connecting rotating shaft 42, an inclined abutting block 43, a bearing part 44, a damping member 45 and a guiding rotating shaft, wherein the middle protruding part 41 is fixedly connected with the supporting shaft 2 and is positioned at one side of the supporting shaft 2 far away from the mounting seat 1, the connecting rotating shaft 42 is rotatably connected with the middle protruding part 41 and is positioned at one side of the middle protruding part 41 far away from the supporting shaft 2, the inclined abutting block 43 is fixedly connected with the connecting rotating shaft 42 and is abutted against the supporting shaft 2 and is positioned at one side of the supporting shaft 2 close to the connecting rotating shaft 42, the bearing part 44 is fixedly connected with the inclined abutting block 43 and is rotatably connected with the cone 3 and is positioned between the inclined abutting block 43 and the cone 3, the guiding rotating shaft 47 is fixedly connected with the inclined abutting block 43 and is rotatably connected with the hydraulic telescopic rod 453, and is positioned inside the mounting groove 431; the inclined abutting block 43 is provided with the installation groove 431 and an arc-shaped protrusion 432, the opening of the installation groove 431 is positioned at one side of the inclined abutting block 43 close to the supporting shaft 2, the arc-shaped protrusion 432 is positioned at one side of the inclined abutting block 43 close to the installation groove 431, the shock absorption member 45 comprises an arc-shaped slide rail 451, a supporting bottom plate 452, the hydraulic telescopic rod 453 and a return spring 454, the arc-shaped slide rail 451 is fixedly connected with the middle protruding part 41 and is matched with the arc-shaped protrusion 432 and is positioned at one side of the supporting shaft 2 close to the arc-shaped protrusion 432, the supporting bottom plate 452 is fixedly connected with the supporting shaft 2 and is positioned at one side of the supporting shaft 2 close to the installation groove 431, one end of the hydraulic telescopic rod 453 is fixedly connected with the inclined abutting block 43 and the other end is fixedly connected with the supporting bottom plate 452 and is positioned in the, one side of the return spring 454 is fixedly connected with the inclined abutting block 43, and the other side is fixedly connected with the supporting bottom plate 452 and sleeved on the periphery of the hydraulic telescopic rod 453.

In this embodiment, the mounting seat 1 is connected to an external driving device by a thread, and is used to mount the cone 3 through the support shaft 2 and the bearing piece 44, the shape of the cone 3 is a semi-circular body, the middle protruding piece 41 is fixed at the central position of the support shaft 2 by a bolt, the number of the cones 3 is three, and the cones are respectively arranged along the circumferential direction by the three bearing pieces 44 and the inclined abutting block 43 with the central position of the middle protruding piece 41 as the axis center, the outer side surface of the middle protruding piece 41 is connected with three connecting rotating shafts 42 by bearings, the connecting rotating shafts 42 are perpendicular to the central axis of the middle protruding piece 41, the outer periphery of the connecting rotating shafts 42 is welded and fixed to the side wall at the top of the inclined abutting block 43, so that the inclined abutting block 43 rotates with the axis of the connecting rotating shafts 42 as the axis center, the two side ends of the inclined abutting block 43 abut against the middle protruding part 41, the bottom of the inclined abutting block 43 is provided with the installation groove 431, the outer side surface of the middle protruding part 41 is threadedly provided with the supporting base plate 452, the supporting base plate 452 is close to the notch of the installation groove 431 of the inclined abutting block 43, the installation groove 431 is a rectangular groove, the guide rotating shaft 47 is installed inside the installation groove 431, the guide rotating shaft 47 is threadedly fixed on the two side walls of the installation groove 431, one end of the hydraulic telescopic rod 453 is installed on the guide rotating shaft 47 through a bearing, the other end of the hydraulic telescopic rod 453 is threadedly fixed on the supporting base plate 452, the hydraulic telescopic rod 453 is a multi-section telescopic rod, hydraulic oil is filled inside the rod, so that the hydraulic telescopic rod 453 can be telescopic and is internally buffered during the telescopic process, so that the hydraulic telescopic rod 453 can slow down the movement of the tilt resisting block 43; two ends of the return spring 454 are respectively sleeved on the support bottom plate 452 and the guide rotating shaft 47 and are sleeved on the periphery of the hydraulic telescopic rod 453, the return spring 454 is extruded by the rotation of the inclined abutting block 43, and the return spring 454 converts the pressure into elastic potential energy to perform reverse work on the inclined abutting block 43, so that the vibration of the inclined abutting block 43 is reduced; thus, the mounting base 1 is driven to rotate, the cone 3 is in contact with the ground of the well bottom, the cone 3 vibrates up and down in the rotating process, the vibration is transmitted to the inclined abutting block 43, the inclined abutting block 43 is driven to rotate by taking the central shaft of the connecting rotating shaft 42 as an axis, the hydraulic telescopic rod 453 located at the bottom of the inclined abutting block 43 rotates with the inclined abutting block 43 through the guide rotating shaft 47, the hydraulic telescopic rod 453 is driven to extend and retract between the supporting base plate 452 and the inclined abutting block 43, the return spring 454 located on the periphery of the hydraulic telescopic rod 453 abuts between the supporting base plate 452 and the inclined abutting block 43, and the inclined abutting block 43 is damped, so that the cone 3 is more stable in the rotating process.

Further, referring to fig. 4, the supporting shaft 2 has a chip groove 21, and the chip groove 21 is located on a side of the supporting shaft 2 close to the cone 3 and penetrates through the supporting shaft 2 in a direction toward the mounting seat 1.

Further, referring to fig. 4, the mounting base 1 has a receiving cavity 11, and the receiving cavity 11 is located inside the mounting base 1 and is communicated with the chip groove 21.

In this embodiment, the flutes 21 penetrate the support shaft 2 and penetrate the receiving cavity 11 inside the mounting seat 1, and the receiving cavity 11 of the mounting seat 1 discharges crushed hard rock through a through hole at the bottom of the mounting seat 1, so that the cone 3 discharges the crushed hard rock accumulated around the cone 3 during the rotation process, thereby reducing the collision between the cone 3 and the hard rock and further stabilizing the rotation of the cone 3.

Further, referring to fig. 3, the arc-shaped slide rail 451 has a T-shaped slot 4511, and the T-shaped slot 4511 is located at a side of the arc-shaped slide rail 451 close to the arc-shaped protrusion 432 and is matched with the arc-shaped protrusion 432.

In this embodiment, the T-shaped groove 4511 is disposed on the outer side of the arc-shaped slide rail 451, the arc-shaped slide rail 451 is screwed on the outer side of the middle protruding member 41, and the T-shaped groove 4511 is engaged with the arc-shaped protrusion 432, so that the rotation of the inclined abutting block 43 and the middle protruding member 41 is limited by the arc-shaped slide rail 451, and further the movement of the inclined abutting block 43 is changed into the sliding of the arc-shaped protrusion 432 along the arc-shaped slide rail 451, so that the movement of the inclined abutting block 43 is more stable.

Further, referring to fig. 2, the connecting assembly 4 further includes a driving motor 46, the driving motor 46 is fixedly connected to the inclined abutting block 43, and an output shaft is fixedly connected to the cone 3 and located on a side of the inclined abutting block 43 away from the bearing member 44.

In this embodiment, the driving motor 46 is fixed to the outer side of the inclined abutting block 43 through a screw thread, and an output shaft penetrates through the bearing member 44, so that the output shaft of the driving motor 46 is fixed to the cone 3 through a screw thread, thereby driving the cone 3 to rotate around the center line of the bearing member 44, and enabling the cone 3 to crush the hard ground stone layer more efficiently.

Further, referring to fig. 4, the connecting assembly 4 further includes a lateral blade 48, and the lateral blade 48 is fixedly connected to the supporting shaft 2, located outside the supporting shaft 2, and located between the mounting seat 1 and the middle protruding member 41.

In this embodiment, the lateral blades 48 are screwed on the periphery of the supporting shaft 2, and are inclined towards one side of the cone 3, and the included angle between the lateral blades and the surface of the supporting shaft 2 is 30 °, so that the supporting shaft 2 widens the ground hard stone layer in the rotating process, broken hard stones can be stored on the rear side of the mounting seat 1, and hard stone broken slag is prevented from being accumulated at the position of the cone 3.

Further, referring to FIG. 1, the cone 3 has friction protrusions 31, and the friction protrusions 31 are located on a side of the cone 3 away from the bearing member 44.

In this embodiment, the surface of the cone 3 has a plurality of friction protrusions 31, and the friction protrusions 31 can increase the friction force with the ground, so that the cone 3 can better contact with the ground when rotating, and the cone 3 is prevented from slipping to generate vibration in an inclined direction.

Further, referring to fig. 1, the screw drill bit structure 100 for oil exploitation further includes a hydraulic pushing rod 5, where the hydraulic pushing rod 5 is fixedly connected to the mounting base 1 and is located on a side of the mounting base 1 away from the supporting bottom plate 452.

In this embodiment, the hydraulic push rod 5 is driven to rotate by an external motor device, and further drives the mounting seat 1 and the cone 3 to rotate towards the bottom of the drilling well, so that the cone 3 rotates while rotating with the central axis of the support shaft 2 as an axis, and the construction efficiency of the cone 3 is higher.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A screw drill bit structure for oil exploitation is characterized by comprising a mounting seat, a supporting shaft, a gear wheel and a connecting assembly;

the supporting shaft is fixedly connected with the mounting seat and is positioned on one side of the mounting seat, and the cone is rotatably connected with the supporting shaft and is positioned on one side of the supporting shaft, which is far away from the mounting seat;

the connecting assembly comprises a middle protruding part, a connecting rotating shaft, an inclined abutting block, a bearing part, a damping component and a guide rotating shaft, the middle protruding part is fixedly connected with the supporting shaft and is positioned on one side of the supporting shaft, which is far away from the mounting seat, the connecting rotating shaft is rotatably connected with the middle protruding part and is positioned on one side of the middle protruding part, which is far away from the supporting shaft, the inclined abutting block is fixedly connected with the connecting rotating shaft, is abutted against the supporting shaft and is positioned on one side of the supporting shaft, which is close to the connecting rotating shaft, the bearing part is fixedly connected with the inclined abutting block, is rotatably connected with the gear wheel and is positioned between the inclined abutting block and the gear wheel, and the guide rotating shaft is fixedly connected with the inclined abutting block, is rotatably connected with the hydraulic telescopic rod and is positioned in the mounting groove;

the inclined abutting block is provided with the mounting groove and an arc-shaped bulge, the opening of the mounting groove is positioned at one side of the inclined abutting block close to the supporting shaft, the arc-shaped bulge is positioned at one side of the inclined abutting block close to the mounting groove, the damping component comprises an arc-shaped slide rail, a supporting bottom plate, the hydraulic telescopic rod and a return spring, the arc-shaped slide rail is fixedly connected with the middle bulge piece and matched with the arc-shaped bulge, and is positioned at one side of the supporting shaft close to the arc-shaped bulge, the supporting bottom plate is fixedly connected with the supporting shaft and positioned at one side of the supporting shaft close to the mounting groove, one end of the hydraulic telescopic rod is fixedly connected with the inclined abutting block, the other end of the hydraulic telescopic rod is fixedly connected with the supporting bottom plate and positioned in the mounting groove, and one side of the return spring, and the other side is fixedly connected with the supporting bottom plate and sleeved on the periphery of the hydraulic telescopic rod.

2. The oil country tubular goods drill bit structure of claim 1,

the supporting shaft is provided with a chip groove, the chip groove is located on one side, close to the cone, of the supporting shaft and penetrates through the supporting shaft towards the direction of the mounting seat.

3. A screw drill bit structure for oil exploitation according to claim 2,

the mounting seat is provided with a containing cavity, and the containing cavity is located inside the mounting seat and communicated with the chip discharge groove.

4. The oil country tubular goods drill bit structure of claim 1,

screw drill bit structure for oil development still includes hydraulic pressure pushing ram, hydraulic pressure pushing ram with mount pad fixed connection, and be located the mount pad is kept away from one side of supporting baseplate.

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