CN113802995A

CN113802995A - PDC drill bit for directional drilling

Info

Publication number: CN113802995A
Application number: CN202111071480.7A
Authority: CN
Inventors: 文俐
Original assignee: Dongying Guangnian Petroleum Technology Co ltd
Current assignee: Hunan Jinhe Mining Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-12-17
Anticipated expiration: 2041-09-14
Also published as: CN113802995B

Abstract

The invention belongs to the technical field of oil drilling tools, and particularly relates to a PDC drill bit for directional drilling. The PDC drill bit comprises a drill bit part, an installation part and a sliding cylinder which penetrates through the drill bit part and extends to the top of the installation part, wherein the top of the drill bit part is fixedly connected with a connecting column, a cross is integrally formed at the top of the connecting column, a cross groove is formed in the installation part, and the cross is positioned in the cross groove; the connecting column is connected with the mounting part through a connecting spring, a plurality of circumferentially and uniformly distributed inserting plates are hinged to the edge of the top of the drill bit part, an inserting hole is formed in the bottom of the mounting part, the free end of each inserting plate is inserted into the corresponding inserting hole, a roller is mounted at the top end of each inserting plate, and a double-end groove is formed in one surface, close to the connecting column, of each inserting plate; the invention can protect the feet of the personnel when in installation by the existence of the compression bag inserted into the plate and the roller at the end part of the compression bag, reduce the friction with the rock when in pulling out, and improve the efficiency when in pulling out.

Description

PDC drill bit for directional drilling

Technical Field

The invention belongs to the technical field of oil drilling tools, and particularly relates to a PDC drill bit for directional drilling.

Background

The use of directional drilling technology in oil drilling projects is also increasing rapidly, with an increasing number of directional wells. In directional drilling, a desired wellbore trajectory is typically drilled using a combination of rotation and sliding. In order to meet the requirement of directional drilling, improve the efficiency of drilling engineering and reduce the drilling cost, the optimization of a directional drill bit is particularly important.

When the drill bit is installed, the drill bit is heavy, if the drill bit is not stably held, the drill bit is easy to fall to the ground, the drill bit can be smashed on the foot surface after being toppled, foot surface swelling is caused, meanwhile, when the drilling is irregular, the drill bit is easy to scratch and rub with rocks when the drill bit is pulled out, the service life of the drill bit is influenced, and the pulling-out efficiency is reduced.

Therefore, it is necessary to invent a PDC drill bit for directional drilling to solve the above problems.

Disclosure of Invention

In view of the above problems, the present invention provides a PDC drill bit for directional drilling to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a PDC drill bit for directional drilling comprises a drill bit part, an installation part and a sliding cylinder penetrating through the drill bit part and extending to the top of the installation part, wherein the top of the drill bit part is fixedly connected with a connecting column, the top of the connecting column is integrally formed with a cross, a cross groove is formed in the installation part, and the cross is located in the cross groove; the connecting column is connected with the mounting part through a connecting spring, a plurality of circumferentially and uniformly distributed inserting plates are hinged to the edge of the top of the drill bit part, an inserting hole is formed in the bottom of the mounting part, the free end of each inserting plate is inserted into the inserting hole, a roller is mounted at the top end of each inserting plate, a double-head groove is formed in one surface, close to the connecting column, of each inserting plate, double heads of each double-head groove are respectively located on the surfaces of the inserting plates on the two side surfaces of the roller and back to the connecting column; the compression bag is bonded on the deep groove wall in the double-end groove, the surface of the compression bag is fixedly connected with the pressing plate, the surface of the pressing plate is fixedly connected with the hemisphere, and the hemisphere is in contact with the joint.

Preferably, one side fixedly connected with extension rod of hemisphere is kept away from to the clamp plate, and extension rod one end runs through the clamp plate, and this end fixedly connected with gravity ball, and the extension rod sets up along its middle part department is articulated, the drill bit portion outside is provided with the chucking board, and the calabash groove has been seted up on the chucking board surface, and the diameter of gravity ball is between the macrostoma in calabash groove and osculum, and the macrostoma department in calabash groove is more close to the drill bit portion than self osculum department.

Preferably, gravity ball fixed surface is connected with the parcel pad, and the episphere department fixedly connected with of parcel pad a plurality of rubber poles, a plurality of rubber pole circumference equipartitions, and the free end of rubber pole outwards extends.

Preferably, a circular table cavity is formed in the inner side of the end part of the rubber rod, the tip end section of the circular table cavity gradually inclines upwards, and an auxiliary ball with the same diameter as the bottom end of the circular table cavity is arranged inside the circular table cavity.

Preferably, one end of the clamping plate is bent upwards, and the bottom surface of the clamping plate is polished.

Preferably, the surface of the clamping plate is sleeved with a sliding pipe, and the sliding pipe is positioned on the edge of a large opening of the gourd-shaped groove and is connected with the drill bit part through a horizontal spring.

Preferably, the surface of the hemisphere is fixedly connected with a noise reduction pad, a plurality of cavities are formed in the noise reduction pad, and methane is filled in the cavities.

Preferably, the sliding cylinder is fixedly connected with the drill bit part, and the sliding cylinder is slidably connected with the mounting part.

Preferably, the surface of the cross is polished, and the cross groove is matched with the shape of the cross.

The invention has the technical effects and advantages that:

1. the invention can protect the feet of the personnel when in installation by the existence of the compression bag inserted into the plate and the roller at the end part of the compression bag, reduce the friction with the rock when in pulling out, and improve the efficiency when in pulling out;

2. the invention can drive the top end of the inserting plate to deflect rapidly to enable the inserting plate to be in a horizontal state through the existence of the gravity ball, does not need personnel to manually operate the inserting plate to be horizontal, and the clamping plate plays a role in limiting the gravity ball, thereby preventing the compressed and expanded compression bag from returning and ensuring the protection effect on the foot;

3. the invention can reduce the probability of the gravity ball passing through the small opening of the gourd-shaped groove by the existence of the rubber rod and the auxiliary ball, thereby further ensuring the effect of limiting the rising of the gravity ball.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

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

FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention;

FIG. 3 is a top cross-sectional view of the mounting portion and connecting stud of the present invention;

FIG. 4 is a schematic view of the side of the insert plate facing the connecting stud in the present invention;

FIG. 5 is a schematic view of one side of the insert plate coupled post of the present invention;

FIG. 6 is a top view of the clamping plate of the present invention;

fig. 7 is a sectional view of a rubber rod in the present invention.

In the figure: the device comprises a drill bit part 1, an installation part 2, a sliding cylinder 3, a connecting column 4, a connecting spring 5, an insertion plate 6, a roller 7, a double-end groove 8, a compression bag 9, a pressing plate 10, a hemispheroid 11, an extension rod 12, a gravity ball 13, a clamping plate 14, a gourd-shaped groove 15, a wrapping pad 16, a rubber rod 17, a circular table cavity 18, an auxiliary ball 19, a sliding tube 20 and a noise reduction pad 21.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present 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.

The invention provides a PDC drill bit for directional drilling, which comprises a drill bit part 1, an installation part 2 and a sliding cylinder 3, wherein the sliding cylinder 3 penetrates through the drill bit part 1 and extends to the top of the installation part 2, the sliding cylinder 3 is fixedly connected with the drill bit part 1, the sliding cylinder 3 is slidably connected with the installation part 2, the top of the drill bit part 1 is fixedly connected with a connecting column 4, the top of the connecting column 4 is integrally formed with a cross, a cross groove is arranged in the installation part 2, and the cross is positioned in the cross groove; the connecting column 4 is connected with the mounting part 2 through a connecting spring 5, a plurality of circumferentially and uniformly distributed inserting plates 6 are hinged to the edge of the top of the drill bit part 1, an inserting hole is formed in the bottom of the mounting part 2, the free end of each inserting plate 6 is inserted into the corresponding inserting hole, a roller 7 is mounted at the top end of each inserting plate 6, a double-head groove 8 is formed in one surface, close to the connecting column 4, of each inserting plate 6, double heads of each double-head groove 8 are respectively located on the surfaces of the inserting plates 6 on the two side faces of each roller 7 and face away from the connecting column 4; the compression bag 9 is bonded on the deep groove wall in the double-end groove 8, the surface of the compression bag 9 is fixedly connected with the pressing plate 10, the surface of the pressing plate 10 is fixedly connected with the hemisphere 11, and the hemisphere 11 is in contact with the joint.

When the installation is carried out, the installation part 2 and the drill bit part 1 can be pulled away, the connecting spring 5 is stretched, after the top end of the insertion plate 6 is moved out of the insertion hole, the free end of the insertion plate 6 deflects outwards, so that the insertion plate 6 rotates from a vertical state to a horizontal state, then the installation part 2 and the drill bit part 1 are loosened, the installation part 2 is installed at a drill rod of a drilling platform, in the installation process, if the installation part 2 and the drill bit part 1 fall off, the drill bit part 1 firstly impacts on the ground, the installation part 2 is gradually close to the drill bit part 1 under the action of inertia force, then the hemispheroid 11 is pressed downwards, the pressing plate 10 is pressed downwards by the hemispheroid 11, the pressing plate 10 compresses the compression bag 9, the gas in the compression bag 9 is pressed to the double ends of the double-end groove 8, the compression bag 9 expands and grows near the roller 7 and rises out of the insertion plate 6, then the installation part 2 is gradually inclined, the expanded part of the compression bag 9 just plays a role in protecting the feet, so that the safety of workers during installation is improved;

then, the mounting part 2 is pulled to be far away from the drill bit part 1, and the inserting plate 6 is inserted into the inserting hole again, and then in the working process, the inserting plate 6 is inserted into the inserting hole, so that the strength between the drill bit part 1 and the mounting part 2 is improved;

when the path of drilling is accomplished after, when the path of drilling is crooked, when pulling back the drill bit behind the drilling, during the drill bit rubs with the rock of drilling department, can keep away from installation department 2 and the pulling of drill bit portion 1, thereby make insert board 6 follow the downthehole removal of insert, when pulling again afterwards, insert the gyro wheel 7 and the rock friction of 6 tip departments of board, drill bit portion 1 can not rub with the rock again, not only play the guard action to drill bit portion 1, and when pulling out, the rotation of gyro wheel 7 can reduce frictional force, thereby efficiency when having improved and pulling out.

Referring to the attached

drawings

1 and 2 of the specification, one side fixedly connected with extension rod 12 that hemisphere 11 was kept away from to clamp plate 10, extension rod 12 one end runs through clamp plate 10, and this end fixedly connected with gravity ball 13, extension rod 12 along its middle part department articulated setting, the drill bit portion 1 outside is provided with chucking plate 14, and calabash shape groove 15 has been seted up on chucking plate 14 surface, and the diameter of gravity ball 13 is between the macrostoma and the osculum of calabash shape groove 15, and the macrostoma department of calabash shape groove 15 is more close to drill bit portion 1 than self osculum department.

When the pull-up installation part 2 is separated from the drill bit part 1, the top end of the insertion plate 6 is driven to deflect rapidly to enable the insertion plate to be in a horizontal state due to the existence of the gravity ball 13, manual operation of personnel is not needed, the insertion plate 6 is horizontal, if the installation part 2 and the drill bit part 1 drop in the installation process, the installation part 2 extrudes the compression bag 9 due to inertia, when the pressing plate 10 moves downwards, the extension rod 12 and the gravity ball 13 are driven to move downwards together, when the installation part 2 moves downwards to the lowest position, the gravity ball 13 moves downwards to the bottom of the clamping plate 14 from the large opening of the gourd-shaped groove 15, when the installation part 2 topples, the gravity ball 13 drives one end of the bottom of the extension rod 12 to incline to the small opening of the clamping plate 14, the clamping plate 14 plays a limiting role on the gravity ball 13, the compression bag 9 after compression and expansion is prevented, and the protection effect on the foot part is guaranteed.

Referring to the attached drawing 2 of the specification, a wrapping pad 16 is fixedly connected to the surface of the gravity ball 13, a plurality of rubber rods 17 are fixedly connected to the upper hemispherical surface of the wrapping pad 16, the plurality of rubber rods 17 are uniformly distributed in the circumferential direction, and the free ends of the rubber rods 17 extend outwards.

In the process that the gravity ball 13 passes through the large opening of the gourd-shaped groove 15, the top end of the rubber rod 17 firstly deflects inwards, after the gravity ball 13 completely passes through the clamping plate 14, the rubber rod 17 returns to the original position, then the rubber rod 17 and the gravity ball 13 reach the small opening of the gourd-shaped groove 15 together, and when the restoring force of the compression bag 9 drives the gravity ball 13 to expand and deform the small opening, the rubber rod 17 exists, so that the effect of limiting the rising of the gravity ball 13 is ensured.

Referring to the attached

drawings

2 and 7 in the specification, a circular truncated cone cavity 18 is formed in the inner side of the end portion of the rubber rod 17, the tip end section of the circular truncated cone cavity 18 gradually inclines upwards, and an auxiliary ball 19 with the same diameter as the bottom end diameter of the circular truncated cone cavity 18 is arranged inside the circular truncated cone cavity 18.

After the gravity ball 13 arrives at the small-opening bottom of the driving rubber rod 17 to reach the gourd-shaped groove 15, when the compression bag 9 returns, the rubber rod 17 can be driven to extrude at the small-opening edge of the gourd-shaped groove 15, the rubber rod 17 can be extruded, the free end of the rubber rod 17 is downward at the moment, so that the tip of the circular table cavity 18 is downward, when the auxiliary ball 19 in the rubber rod 17 is extruded, the auxiliary ball 19 moves towards the tip of the circular table cavity 18, so that the circular table cavity 18 expands and becomes large, the rubber rod 17 expands, the probability that the gravity ball 13 passes through the small opening of the gourd-shaped groove 15 is further reduced, and the limiting effect on the rising of the gravity ball 13 is further ensured.

Referring to the attached fig. 1 and 6 of the specification, one end of the chucking plate 14 is bent upward, and the bottom surface of the chucking plate 14 is polished.

One end of the clamping plate 14 is bent upwards, so that the gravity ball 13 can be blocked, the gravity ball 13 is prevented from inclining in the direction away from the drill bit part 1 before not passing through the gourd-shaped groove 15, and meanwhile, the friction between the gravity ball 13 and the gravity ball 13 can be reduced after the bottom surface of the gravity ball is polished, so that the gravity ball 13 can be rapidly moved to a small opening from a large opening of the gourd-shaped groove 15.

Referring to the attached fig. 1 and fig. 6 of the specification, a sliding pipe 20 is sleeved on the surface of the chucking plate 14, and the sliding pipe 20 is located at the large-opening edge of the gourd-shaped groove 15 and connected with the drill bit part 1 through a horizontal spring.

When the gravity ball 13 reaches the large opening of the gourd-shaped groove 15, the sliding tube 20 is pushed to compress the horizontal spring, and after the gravity ball 13 completely passes through the large opening, the connecting spring 5 pushes the sliding tube 20 to push the extension rod 12, so that the gravity ball 13 moves quickly to the small opening to be limited.

Referring to the attached figure 2 of the specification, the surface of the hemisphere 11 is fixedly connected with a noise reduction pad 21, a plurality of cavities are formed in the noise reduction pad 21, and methane is filled in the cavities.

The noise reduction pad 21 can reduce the noise when the installation part 2 extrudes the hemispheroid 11 under the inertia effect, and is convenient to deform after a cavity is formed in the noise reduction pad, so that the probability of permanent deformation is reduced, methane in the cavity has certain lifting force, the effect of the inserted plate 6 can be forceful, and after the inserted hole is completely separated from the inserted plate 6, the effect of the lifting force is matched with the effect of the gravity ball 13, so that the inserted plate 6 can be quickly adjusted to be in a horizontal state.

Referring to the specification and the attached figure 3, the surface of the cross is subjected to polishing treatment, and the cross groove is matched with the shape of the cross.

Reduce the wearing and tearing between cross and the cross groove, more stable when enabling its vertical removal simultaneously.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A PDC drill bit for directional drilling, characterized by: the drill bit comprises a drill bit part (1), an installation part (2) and a sliding cylinder (3) which penetrates through the drill bit part (1) and extends to the top of the installation part (2), wherein the top of the drill bit part (1) is fixedly connected with a connecting column (4), a cross is integrally formed at the top of the connecting column (4), a cross groove is formed in the installation part (2), and the cross is positioned in the cross groove; the connecting column (4) is connected with the mounting part (2) through a connecting spring (5), a plurality of circumferentially and uniformly distributed inserting plates (6) are hinged to the edge of the top of the drill bit part (1), an inserting hole is formed in the bottom of the mounting part (2), the free end of each inserting plate (6) is inserted into the corresponding inserting hole, a roller (7) is mounted at the top end of each inserting plate (6), a double-head groove (8) is formed in one surface, close to the connecting column (4), of each inserting plate (6), double heads of each double-head groove (8) are located on the surfaces of the inserting plates (6) on the two side faces of each roller (7) respectively and face away from the connecting column (4); a compression bag (9) is bonded on the deep groove wall in the double-end groove (8), the surface of the compression bag (9) is fixedly connected with a pressure plate (10), the surface of the pressure plate (10) is fixedly connected with a hemisphere (11), and the hemisphere (11) is contacted with the joint.

2. A PDC bit for directional drilling according to claim 1, wherein: one side fixedly connected with extension rod (12) of hemispheroid (11) is kept away from in clamp plate (10), extension rod (12) one end runs through clamp plate (10), and this end fixedly connected with gravity ball (13), extension rod (12) set up along its middle part department is articulated, drill bit portion (1) outside is provided with chucking board (14), calabash shape groove (15) have been seted up on chucking board (14) surface, the diameter of gravity ball (13) is between the macrostoma and the osculum of calabash shape groove (15), and the macrostoma department of calabash shape groove (15) is more close to drill bit portion (1) than self microculum department.

3. A PDC bit for directional drilling according to claim 2, wherein: gravity ball (13) fixed surface is connected with parcel pad (16), and the episphere department fixedly connected with of parcel pad (16) has a plurality of rubber poles (17), a plurality of rubber poles (17) circumference equipartition, and the free end of rubber pole (17) outwards extends.

4. A PDC bit for directional drilling according to claim 3, wherein: a round table cavity (18) is formed in the inner side of the end portion of the rubber rod (17), the tip end section of the round table cavity (18) gradually inclines upwards, and an auxiliary ball (19) with the same diameter as the bottom end of the round table cavity (18) is arranged inside the round table cavity.

5. A PDC bit for directional drilling according to claim 4, wherein: one end of the clamping plate (14) is bent upwards, and the bottom surface of the clamping plate (14) is polished.

6. A PDC bit for directional drilling according to claim 5, wherein: the surface of the clamping plate (14) is sleeved with a sliding pipe (20), and the sliding pipe (20) is positioned at the edge of the large opening of the gourd-shaped groove (15) and is connected with the drill bit part (1) through a horizontal spring.

7. The PDC bit of claim 6, wherein: hemisphere (11) surface fixedly connected with noise reduction pad (21), noise reduction pad (21) is inside to be seted up a plurality of cavitys, and cavity inside is filled has methane.

8. A PDC bit for directional drilling according to claim 7, wherein: the sliding cylinder (3) is fixedly connected with the drill bit part (1), and the sliding cylinder (3) is slidably connected with the mounting part (2).

9. A PDC bit for directional drilling according to claim 8, wherein: the surface of the cross is polished, and the cross groove is matched with the cross in shape.