While-drilling reamer

Abstract

The invention provides a reamer while drilling, which relates to the technical field of reamers and comprises a shell, a transmission part and a driving part which are connected in sequence, the end, away from the transmission piece, of the shell is provided with a first connecting part. The end, away from the transmission piece, of the driving piece is provided with a second connecting part. A first through hole and a second through hole which communicate with each other are formed in the shell and the transmission part correspondingly, a containing groove communicating with the first through hole is formed in the outer wall of the shell, a blade part is rotationally embedded in the containing groove, and a slope part is arranged on the side, close to the interior of the first through hole, of the blade part; the end, away from the second connecting part, of the driving part slidably penetrates into the first through hole and the second through hole and can transmit torque with the transmission part, the driving part makes contact with the inclined face part through the conical face, and the driving part can drive the blade part to rotate along with movement of the driving part in the direction close to the first connecting part. At least part of the blade parts move towards the outer part of the shell; and reaming while drilling can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of hole expanders, and more specifically, relates to a hole expander while drilling. Background Art

[0002] A hole reamer is also called an eye expander. At present, the existing mature eye reaming technologies in China all belong to the post-drilling method. The more mature eye expanders mainly include: dual-center drill bits, eccentric hole reaming drill bits, mechanical PDC eye expanders, etc.

[0003] These conventional reamers and process technologies are widely used, and there are many inconveniences in the process of use. When the size of the hole to be reamed is different, it is necessary to pull the drill bit up and down many times to replace the reamer tool, which seriously affects the drilling speed.

[0004] In addition, some sections of the well have large torque and are subjected to unilateral force, which may lead to severe drilling stagnation in harder formations, affecting the service life of the drill string and drill bit, and easily resulting in stepped wellbore. The quality of the wellbore after expansion is difficult to guarantee, which brings great risks to subsequent casing operations.

[0005] At the same time, the existing while-drilling reamer has a complex structure and low reaming efficiency, and its application in post-drilling reaming in directional and horizontal sections is limited. Summary of the invention

[0006] The purpose of the present invention is to provide a hole-reamer while drilling to address the deficiencies in the prior art, so as to solve the problems that conventional hole reamers in the prior art need to be replaced by multiple trips in and out of the drill bit during use, resulting in low efficiency and difficulty in ensuring the quality of the wellbore after expansion, and that the existing hole-reamer while drilling has a complex structure and is limited in its application in directional and horizontal sections in post-drilling expansion.

[0007] In order to achieve the above object, the present invention provides a drilling reamer, comprising:

[0008] A housing, a transmission member and a drive member connected in sequence;

[0009] A first connection portion is provided at one end of the housing away from the transmission member, and a second connection portion is provided at one end of the driving member away from the transmission member;

[0010] The housing and the transmission member are respectively provided with a first through hole and a second through hole which are connected to each other, the outer wall of the housing is provided with a receiving groove which is connected to the first through hole, a blade component is rotatably embedded in the receiving groove, and a side of the blade component close to the first through hole is provided with an inclined portion;

[0011] One end of the driving member away from the second connecting portion slides through the first through hole and the second through hole and can transmit torque to the transmission member. The driving member contacts the inclined portion through a conical surface. As the driving member moves toward the first connecting portion, the driving member can drive the blade component to rotate so that at least part of the blade component moves toward the outside of the housing.

[0012] Optionally, a threaded hole is provided at one end of the housing away from the first connection portion, and an external thread that is threadably matched with the threaded hole is provided at an outer periphery of one end of the transmission member away from the second connection portion.

[0013] Optionally, a third through hole is provided inside the driving member, and the third through hole is communicated with the first connecting portion and the second connecting portion.

[0014] Optionally, one end of the blade component close to the first connecting portion is rotatably connected to the accommodating groove via a rotating shaft, the other end of the blade component is provided with a plurality of cutting teeth, and the inclined portion is provided at one end of the blade component close to the rotating shaft.

[0015] Optionally, the driving member includes a first connection part, a transmission connection part and a driving connection part which are arranged in sequence, the outer periphery of the transmission connection part is a regular octagon, and the inner periphery of the second through hole matches the outer periphery of the transmission connection part.

[0016] Optionally, a first annular groove is provided on the outer periphery of the driving connection part, and groove walls on both sides of the first groove are respectively a first conical surface and a second conical surface, and the first conical surface and the second conical surface are respectively close to the second connection part and close to the first connection part.

[0017] Optionally, the aperture of the second through hole is smaller than that of the first through hole, and a second annular groove is provided on the outer periphery of one end of the drive connection part close to the transmission connection part, a clamping component is embedded in the second groove, and the outer periphery of the clamping component at least partially protrudes from the outer periphery of the drive connection part to form a limiting portion, and the limiting portion is limitedly matched with the end face of the transmission part close to the first connection part.

[0018] Optionally, the clamping component includes two semicircular clamping rings, and the two clamping rings can be embedded in the second groove to form a complete ring shape.

[0019] Optionally, four accommodating grooves and four blade wing components are respectively provided, each blade wing component is rotatably disposed in one of the accommodating grooves, and the four accommodating grooves are not on the outer wall of the shell along a circumference.

[0020] Optionally, a guide portion is provided at one end of the driving member close to the first connecting portion, and the guide portion is penetrated in the first through hole and cooperates with the inner wall of the first through hole in a sliding guide manner.

[0021] The present invention provides a hole reamer while drilling, which has the following beneficial effects: the hole reamer while drilling has a first connection part and a second connection part, the first connection part is used to connect with a drill collar or a drill rod, and the second connection part is used to connect with a drill bit. During use, under the action of drilling pressure, a driving member can move in a direction close to the first connection part. Since the driving member contacts the inclined portion of a blade component through a conical surface, the blade component can be pushed to rotate, so that at least part of the blade component moves toward the outside of the shell, the cutting outer diameter is enlarged, and then the stepless adjustment of the reaming size is realized, and there is no need to replace the hole reamer, thereby improving the reaming and drilling efficiency. At the same time, the hole reamer while drilling has a simple structure and can be directly connected to the drill bit, providing near-drill bit hole reaming while drilling, suitable for reaming in diameter and directional wells, and improving the quality of reaming and cementing.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0024] Figure 1 A schematic cross-sectional structure diagram of a hole-while-drilling expander according to an embodiment of the present invention is shown.

[0025] Figure 2 A schematic diagram of the appearance structure of a blade component of a hole-while-drilling reamer in an open state is shown according to an embodiment of the present invention.

[0026] Figure 3 A schematic cross-sectional structure diagram of a blade component of a hole-while-drilling reamer in an open state is shown according to an embodiment of the present invention.

[0027] Figure 4 A schematic structural diagram of a transmission component of a hole-while-drilling reamer according to an embodiment of the present invention is shown.

[0028] Figure 5 A schematic structural diagram of a driving component of a hole-while-drilling reamer according to an embodiment of the present invention is shown.

[0029] Figure 6 A schematic diagram of the three-dimensional structure of a housing of a hole-while-drilling reamer according to an embodiment of the present invention is shown.

[0030] Figure 7 A schematic cross-sectional structure diagram of a housing of a hole-while-drilling reamer according to an embodiment of the present invention is shown.

[0031] Figure 8 A schematic structural diagram of a blade component of a hole-while-drilling reamer according to an embodiment of the present invention is shown.

[0032] Description of reference numerals:

[0033] 1. Shell; 2. Transmission member; 3. Drive member; 4. First connection part; 5. Second connection part; 6. Accommodating groove; 7. Blade member; 8. First inclined surface; 9. Second inclined surface; 10. First conical surface; 11. Second conical surface; 12. External thread; 13. Threaded hole; 14. Cutting tooth; 15. Rotating hole; 16. Transmission connection part; 17. Drive connection part; 18. Second groove; 19. Clamping member; 20. Guide part. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0035] like Figures 1 to 3 As shown, the present invention provides a drilling reamer, comprising:

[0036] A housing 1, a transmission member 2 and a driving member 3 connected in sequence;

[0037] A first connection portion 4 is disposed at one end of the housing 1 away from the transmission member 2, and a second connection portion 5 is disposed at one end of the driving member 3 away from the transmission member 2;

[0038] The housing 1 and the transmission member 2 are respectively provided with a first through hole and a second through hole connected to each other. The outer wall of the housing 1 is provided with a receiving groove 6 connected to the first through hole. A blade wing component 7 is rotatably embedded in the receiving groove 6. A side of the blade wing component 7 close to the first through hole is provided with an inclined portion.

[0039] One end of the driving member 3 away from the second connecting part 5 is slidably inserted into the first through hole and the second through hole, and can transmit torque to the transmission member 2. The driving member 3 contacts the inclined portion through the conical surface. As the driving member 3 moves toward the first connecting part 4, the driving member 3 can drive the blade component 7 to rotate so that at least part of the blade component 7 moves toward the outside of the outer shell 1.

[0040] Specifically, in order to solve the problems that the conventional reamer in the prior art needs to be replaced by pulling up and down the drill several times during use, which is inefficient, the quality of the wellbore after expansion is difficult to ensure, and the existing reamer while drilling has a complex structure and is limited in the application of post-drilling reaming in directional and horizontal sections; the reamer while drilling provided by the present invention has a first connecting part 4 and a second connecting part 5, the first connecting part 4 is used to connect with a drill collar or a drill pipe, and the second connecting part 5 is used to connect with a drill bit. During use, under the action of drilling pressure, the driving member 3 can move in a direction close to the first connecting part 4, because the driving member 3 contacts the inclined portion of the blade wing component 7 through the conical surface, it can push the blade wing component 7 to rotate, so that at least part of the blade wing component 7 moves to the outside of the housing 1, the cutting outer diameter is enlarged, and then the stepless adjustment of the reaming size is realized, and the reaming and drilling efficiency is improved without replacing the reamer; at the same time, the reamer while drilling has a simple structure and can be directly connected to the drill bit, providing reaming while drilling near the drill bit, suitable for reaming in diameter and directional wells, and improving the reaming and cementing quality.

[0041] Furthermore, during the use of the variable diameter straightener, the drilling reamer is installed on the drill bit, the first connecting part 4 is connected to the drill collar buckle, and the second connecting part 5 is connected to the drill bit buckle. During the drilling process, the cone surface of the driving member 3 does not contact the inclined portion on the blade component 7 under the action of its own weight and the gravity of the drill bit below it. At this time, the blade component 7 is not driven by the driving member 3 and can maintain a contracted state under the action of its own weight; when drilling to the bottom of the well, it is necessary to expand the hole while drilling, and the drilling pressure is applied to make the driving member 3 move relative to the shell 1 in the direction close to the first connecting part 4. Through the cooperation of the cone surface and the inclined surface, the blade component 7 is driven to rotate to the open state. At this time, part of the blade component 7 moves to the outside of the shell 1 to expand the cutting outer diameter and realize drilling reaming; according to the different drilling pressures applied, the opening angle of the blade component 7 can be controlled to achieve the control of the expansion size; when lifting off the bottom of the well or reducing the drilling pressure, the driving member 3 moves downward relative to the shell 1, and the blade component 7 retracts, and the drill can be started and lowered normally.

[0042] Optionally, a threaded hole 13 is provided at one end of the housing 1 away from the first connection portion 4 , and an external thread 12 threadably matched with the threaded hole 13 is provided at the outer periphery of one end of the transmission member 2 away from the second connection portion 5 .

[0043] Specifically, the transmission member 2 is detachably connected to the housing 1 by thread, which facilitates the assembly of the reamer while drilling.

[0044] Optionally, a third through hole is provided inside the driving member 3 , and the third through hole is communicated with the first connecting portion 4 and the second connecting portion 5 .

[0045] Specifically, after the driving member 3 is connected to the transmission member 2 and the outer shell 1, the two ends of the third through hole are respectively connected to the first connecting part 4 and the second connecting part 5, the first connecting part 4 can be used to connect to the drill collar or drill pipe, and the second connecting part 5 can be used to connect to the drill bit; the third through hole in the driving member 3 forms a channel for the flow of drilling fluid during drilling.

[0046] Optionally, one end of the blade component 7 close to the first connecting portion 4 is rotatably connected to the accommodating groove 6 via a rotating shaft, and the other end of the blade component 7 is provided with a plurality of cutting teeth 14, and the inclined portion is provided at the end of the blade component 7 close to the rotating shaft.

[0047] Specifically, Figures 6 to 8 As shown, a rotating hole 15 is provided at one end of the accommodating groove 6 close to the first connecting part 4, and the rotating shaft is inserted in the rotating hole 15. A rotating shaft hole is provided at the upper end of the blade wing component 7. The rotating shaft rotates through the rotating shaft hole, so that the blade wing component 7 is rotatably connected in the accommodating groove 6, and a plurality of cutting teeth 14 are provided at the other end of the blade wing component 7 to form a movable end. When the drilling drive 3 drives the blade wing component 7, the other end of the blade wing component 7 moves outside the outer shell 1, so that the cutting teeth 14 move outward to expand the cutting outer diameter.

[0048] Optionally, the driving member 3 includes a first connecting portion 4, a transmission connecting portion 16 and a driving connecting portion 17 which are arranged in sequence, the outer periphery of the transmission connecting portion 16 is a regular octagon, and the inner periphery of the second through hole matches the outer periphery of the transmission connecting portion 16.

[0049] Specifically, Figure 4 and Figure 5 As shown, the first connection part 4 is cylindrical in shape, and its outer diameter is larger than the maximum outer diameter of the transmission connection part 16 and the drive connection part 17. When the driving member 3 is connected to the transmission member 2, the end face of the first connection part 4 close to the transmission connection part 16 interferes with the end face of the transmission member 2; the outer periphery of the transmission connection part 16 is a regular octagon, forming an octagonal column shape, which can cooperate with the inner wall of the second through hole for transmission and can transmit torque.

[0050] Optionally, a first annular groove is provided on the outer periphery of the driving connection part 17, and the groove walls on both sides of the first groove are respectively a first conical surface 10 and a second conical surface 11, and the first conical surface 10 and the second conical surface 11 are respectively close to the second connection part 5 and close to the first connection part 4.

[0051] Specifically, the conical surface of the driving member 3 is arranged on the driving connection portion 17, and the conical surface includes a first conical surface 10 and a second conical surface 11. The first conical surface 10 and the second conical surface 11 are respectively the two side groove walls of the first groove, and the inclination directions of the two are opposite; in this embodiment, as Figure 8As shown, the inclined surface portion of the blade wing component 7 disposed on one side close to the first through hole includes a first inclined surface 8 and a second inclined surface 9, and the first inclined surface 8 cooperates with the first tapered surface 10 to drive the blade wing component 7 to rotate so that the blade wing component 7 is opened when the driving member 3 moves toward the direction close to the first connecting portion 4, and the blade wing component 7 after opening can be automatically retracted by its own gravity, or a torsion spring can be arranged on it to provide a retracting and resetting torque. The second inclined surface 9 cooperates with the second tapered surface 11 to play a evasive role, which can facilitate the assembly of the blade wing component 7 and the driving member 3.

[0052] Optionally, the aperture of the second through hole is smaller than that of the first through hole, and an annular second groove 18 is provided on the outer periphery of one end of the driving connection part 17 close to the transmission connection part 16, and a clamping component 19 is embedded in the second groove 18, and the outer periphery of the clamping component 19 at least partially protrudes from the outer periphery of the driving connection part 17 to form a limiting portion, which is limitedly matched with the end face of the transmission member 2 close to the first connection part 4.

[0053] Specifically, when the clamping component 19 is clamped in the second groove 18, its outer periphery protrudes from the outer periphery of the driving connecting part 17, and the protruding part is the limiting part. Since the aperture of the second through hole is smaller than the aperture of the first through hole, a step surface is formed on the inner periphery of the transmission member 2 and the outer shell 1. The step surface is a part of the end face of the transmission member 2 close to the first connecting part 4, and forms a limiting fit with the limiting part, which can prevent the driving member 3 from falling out from the bottom of the outer shell 1 and the transmission member 2.

[0054] Furthermore, the arrangement of the transmission member 2 not only realizes the torque transmission between the driving member 3 and the housing 1 through its fastening connection with the housing 1, but also facilitates the assembly of the drilling reamer. During the assembly process, the driving member 3 is first installed into the transmission member 2, and then the clamping member 19 is embedded in the second groove 18, and then the entire member is installed into the first through hole in the housing 1, and the housing 1 and the transmission member 2 are fastened together by threads, and at the same time, the limiting portion of the clamping member 19 and the limiting cooperation with the above-mentioned step surface are also realized.

[0055] Optionally, the clamping component 19 includes two semicircular clamping rings, and the two clamping rings can be embedded in the second groove 18 to form a complete ring.

[0056] Specifically, the clamping component 19 includes two semicircular clamping rings, which are convenient for installation in the second groove 18 and can ensure the clamping and limiting effects.

[0057] Optionally, four accommodating grooves 6 and four blade wing components 7 are respectively provided, each blade wing component 7 is rotatably disposed in an accommodating groove 6, and the four accommodating grooves 6 are not on the outer wall of the housing 1 along a circumference.

[0058] Specifically, the four receiving grooves 6 are evenly distributed on the outer wall of the housing 1 along a circumference, so that the four blade wing components 7 are evenly distributed on the same circumference, so that the force is evenly applied.

[0059] Optionally, a guide portion 20 is provided at one end of the driving member 3 close to the first connecting portion 4 , and the guide portion 20 is penetrated in the first through hole and cooperates with the inner wall of the first through hole in a sliding and guiding manner.

[0060] Specifically, the guide portion 20 cooperates with the first through hole to ensure the stability of the driving member 3 when it moves relative to the housing 1 .

[0061] In summary, the drilling reamer provided by the present invention can make the driving part 3 move upward relative to the outer shell 1 under the action of drilling pressure, and push the blade component 7 to rotate through the cooperation of the conical surface and the inclined surface portion, so that the blade component 7 opens, thereby realizing the drilling reaming function. It is suitable for drilling reaming in well sections with a small well diameter expansion rate, increasing the gap between the wellbore and the casing annulus, and can be used in vertical wells and directional wells to improve the wellbore quality and reduce the number of post-drilling reaming operations.

[0062] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A hole reamer while drilling, characterized in that: include: A housing, a transmission member and a drive member connected in sequence; A first connection portion is provided at one end of the housing away from the transmission member, and a second connection portion is provided at one end of the driving member away from the transmission member; The housing and the transmission member are respectively provided with a first through hole and a second through hole which are connected to each other, the outer wall of the housing is provided with a receiving groove which is connected to the first through hole, a blade component is rotatably embedded in the receiving groove, and a side of the blade component close to the first through hole is provided with an inclined portion; One end of the driving member away from the second connecting portion slides through the first through hole and the second through hole and can transmit torque to the transmission member. The driving member contacts the inclined portion through a conical surface. As the driving member moves toward the first connecting portion, the driving member can drive the blade component to rotate so that at least part of the blade component moves toward the outside of the housing.

2. The reamer while drilling according to claim 1, characterized in that: A threaded hole is disposed at one end of the housing away from the first connection portion, and an external thread that is threadably matched with the threaded hole is disposed at an outer periphery of one end of the transmission member away from the second connection portion.

3. The reamer while drilling according to claim 1, characterized in that: A third through hole is disposed inside the driving member, and the third through hole is communicated with the first connecting portion and the second connecting portion.

4. The reamer while drilling according to claim 1, characterized in that: One end of the blade component close to the first connecting portion is rotatably connected to the accommodating groove via a rotating shaft, the other end of the blade component is provided with a plurality of cutting teeth, and the inclined portion is provided at one end of the blade component close to the rotating shaft.

5. The reamer while drilling according to claim 1, characterized in that: The driving member includes a first connection part, a transmission connection part and a driving connection part which are arranged in sequence. The outer periphery of the transmission connection part is a regular octagon, and the inner periphery of the second through hole matches the outer periphery of the transmission connection part.

6. The reamer while drilling according to claim 5, characterized in that: The outer periphery of the driving connection portion is provided with an annular first groove, and the groove walls on both sides of the first groove are respectively a first conical surface and a second conical surface, and the first conical surface and the second conical surface are respectively close to the second connection portion and close to the first connection portion.

7. The reamer while drilling according to claim 5, characterized in that: The aperture of the second through hole is smaller than that of the first through hole, and an annular second groove is provided on the outer periphery of one end of the driving connection part close to the transmission connection part, and a clamping component is embedded in the second groove, and the outer periphery of the clamping component at least partially protrudes from the outer periphery of the driving connection part to form a limiting portion, and the limiting portion is limitedly matched with the end face of the transmission part close to the first connection part.

8. The reamer while drilling according to claim 7, characterized in that: The clamping component includes two semicircular clamping rings, and the two clamping rings can be embedded in the second groove to form a complete ring.

9. The reamer while drilling according to claim 1, characterized in that: The accommodating grooves and the blade wing components are respectively provided with four, each of the blade wing components is rotatably arranged in one of the accommodating grooves, and the four accommodating grooves are not on the outer wall of the shell along a circumference.

10. The reamer while drilling according to claim 1, characterized in that: A guide portion is disposed at one end of the driving member close to the first connecting portion. The guide portion is penetrated in the first through hole and is slidably guided with the inner wall of the first through hole.

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