Rotary self-guiding baffle float

Abstract

The utility model relates to petroleum pipeline baffle float shoe technical field, especially to a kind of rotary self-guided baffle float shoe. Including pole, the inner wall of drill pipe is movably connected with rotating rod, and one end of drill pipe is provided with float shoe body, and the two ends of float shoe body are evenly provided with a plurality of circulation holes in arc surface, and the inside of float shoe body and rotating rod is provided with adjusting device, and adjusting device includes fixed frame, and the surface of fixed frame is fixedly connected with the inner wall surface of float shoe body, and the inner wall surface of fixed frame is screwed and penetrates drive rod, and the end of drive rod close to rotating rod is fixedly connected with inlay ring, and the surface of inlay ring is provided with inlay groove, and the section of inlay groove is cross-shaped, and one end of rotating rod is fixedly connected with inlay block, and the surface of inlay block is inserted with the inner wall surface of inlay groove. The utility model provides a kind of rotary self-guided baffle float shoe, which has the advantage of facilitating better protection operation for float shoe body.

Description

Technical Field

[0001] This utility model relates to the field of oil pipeline baffle floats, and in particular to a rotating self-guiding baffle float. Background Technology

[0002] A rotating self-guiding float shoe is a tool used in oil wells and pipelines, primarily to assist drilling operations and as a wellhead sealing system. Its purpose is to improve drilling efficiency while protecting the integrity of the wellbore and pipeline. In the oil extraction industry, cementing is a crucial process, and the float shoe is a key component of cementing. During cementing, one end of the float shoe is fixed to the bottom of the casing string. Its function is to guide the casing string into the wellbore, preventing it from scraping against the well wall and rocks during descent and thus avoiding obstruction. It also prevents water and mud from flowing back into the casing string during descent. This is a common feature in oil drilling operations.

[0003] Existing technologies, such as the utility model with publication number CN208267822U, disclose a novel rotating floating shoe, which includes a cage wall and a steaming tray. The cage wall has a tray movement space and a bearing surface located at the bottom of the tray movement space. The steaming tray includes a tray body and a set of support legs extending downward from the tray body. The tray body has a series of ventilation holes, wherein the tray body is movably disposed in the tray body movement space of the cage wall, and the tray body can be locked on the bearing surface of the cage wall. The set of support legs is allowed to extend to the outside through the bottom of the cage wall. When the tray body is not locked on the bearing surface of the cage wall, the steamer is in an unlocked state; when the tray body is locked on the bearing surface of the cage wall, the steamer is in a locked state. The steamer of this utility model allows the user to select the state of the steamer between the unlocked state and the locked state for user convenience.

[0004] During oil drilling operations, it has been found that pressure is generated inside the well during drilling operations. At this time, float shoes are used for auxiliary protection. However, prolonged use of float shoes can lead to reduced sealing and poor mud circulation, thus affecting drilling efficiency. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies in oil drilling operations. During oil drilling, pressure is generated within the well, requiring the use of float shoes for auxiliary protection. However, prolonged use of the float shoes can lead to reduced sealing and impaired mud circulation, thus affecting drilling efficiency.

[0006] To solve the above technical problems, this utility model provides a rotating self-guiding baffle float shoe, comprising: a drill rod, a rotating rod movably connected to the inner wall of the drill rod, a float shoe body provided at one end of the drill rod, and several circulation holes formed on the arc surfaces at both ends of the float shoe body; an adjustment device provided inside the float shoe body corresponding to the rotating rod; the adjustment device includes a fixing frame, the surface of the fixing frame being fixedly connected to the inner wall surface of the float shoe body; a drive rod threaded through the inner wall surface of the fixing frame; an inlaid ring fixedly connected to the end of the drive rod near the rotating rod; an inlaid groove formed on the surface of the inlaid ring, the cross-section of the inlaid groove being cross-shaped. The rotating rod is shaped like a character. One end of the rotating rod is fixedly connected to an inlay block. The surface of the inlay block is inserted into the inner wall of the inlay groove. One end of the inner wall of the floating shoe body is fixedly connected to a baffle. Adjusting rods slide through both sides of the inner wall of the baffle. One end of the two adjusting rods is fixedly connected to the same top block. The arc surface of the top block is inserted into the inner wall of the baffle. The ends of the two adjusting rods away from the top block are fixedly connected to the same connecting ring. The arc surface of the adjusting rod is fitted with a spring. The spring is a stainless steel spring. The two ends of the spring are fixedly connected to the surfaces of the connecting ring and the baffle, respectively. The end of the driving rod near the connecting ring is fixedly connected to a moving block.

[0007] The effects achieved by the above components are as follows: by driving the adjustment device through the rotating rod, the cooperation between the top block and the baffle is controlled, so as to realize the automatic opening or closing of the circulation hole, adapting to the drilling fluid circulation and cement slurry injection requirements. The spring preload makes the top block fit tightly against the constriction of the baffle to form a seal and prevent cement slurry from flowing back into the drill pipe. The rotating rod transmits torque to the drive rod through the cross-shaped inlay structure to achieve precise control and avoid jamming.

[0008] Preferably, a guide ring is fixedly connected to the surface of the inlaid ring, the guide ring has an flared cross section, and the position of the guide ring corresponds to the position of the rotating rod.

[0009] The aforementioned components achieve the following effect: the flared design of the guide ring facilitates the quick alignment and insertion of the insert block at the end of the rotating rod into the insert slot, simplifying the downhole assembly process.

[0010] Preferably, the top block has a pointed conical cross-section, and a sealing ring is fixedly connected to the arc surface of the top block. The inner wall cross-section of the baffle near the top block is constricted. The cross-sectional dimensions of the top block are adapted to the inner wall cross-sectional dimensions of the baffle. The surface of the sealing ring abuts against the inner wall surface of the baffle.

[0011] The effect achieved by the above components is that the pointed cone top block and the constricted baffle form a line seal, and the sealing ring further blocks the reverse flow of fluid. The pointed cone design reduces fluid resistance, making it easier for the top block to detach from or seal the baffle.

[0012] Preferably, the connecting ring has a circular cross-section, the movable block is a rubber block, and the cross-sectional dimensions of the movable block are adapted to the cross-sectional dimensions of the connecting ring.

[0013] The aforementioned components achieve the following effects: the rubber moving block provides flexibility and self-lubrication when pushing the connecting ring, reduces impact and wear, absorbs downhole vibration, and protects the structural integrity of the adjustment device.

[0014] Preferably, an auxiliary device is provided on the arc surface of the float shoe body corresponding to the position of the drill rod. The auxiliary device includes a rotating shaft, the inner wall of which is threadedly connected to the arc surface of the float shoe body. A limiting frame is rotatably connected to one end of the rotating shaft near the drill rod. The inner wall of the limiting frame is movably connected to the arc surface of the float shoe body. Several connecting grooves are formed on the arc surface of the float shoe body near the drill rod. The bottom cross-section of the connecting groove is constricted. A top bead abuts against the inner wall of the connecting groove. The upper arc surface of the top bead abuts against one side of the inner wall of the limiting frame. A retaining groove is formed on the arc surface of the drill rod corresponding to the position of the top bead. The inner wall of the retaining groove is engaged with the arc surface of the top bead.

[0015] The above components achieve the following effects: the rotating shaft drives the limiting frame to move, the top ball is engaged in the drill pipe slot, and the float shoe and drill pipe are reliably fixed. The narrowed connecting groove restricts the displacement of the top ball and ensures the connection stability. The float shoe can be removed by rotating the rotating shaft in the opposite direction, making maintenance convenient.

[0016] Preferably, a second sealing ring is fixedly connected to the side surface of the limiting frame near the drill rod, and a first sealing ring is fixedly connected to the surface of the drill rod corresponding to the inner wall surface of the float shoe body. The inner wall of the float shoe body is inserted into the arc surface of one end of the drill rod.

[0017] The above components achieve the following effects: the first sealing ring seals the gap between the drill rod and the inner wall of the float shoe, and the second sealing ring seals the gap between the limiting frame and the drill rod, preventing fluid leakage.

[0018] Preferably, the arc surface of the rotating shaft is provided with a plurality of friction grooves, and the plurality of friction grooves are evenly distributed on the arc surface of the rotating shaft.

[0019] The effect achieved by the above components is that the friction groove increases the gripping force when the rotating shaft is rotated manually or by tool, making it easier to apply force and ensuring reliable rotation even in high-pressure or oily environments downhole.

[0020] Compared with related technologies, the rotating self-guiding baffle floating shoe provided by this utility model has the following beneficial effects:

[0021] This invention provides a rotary self-guided baffle float shoe. Through the operation of the adjustment device, precise, reliable, and automated control of the opening and closing state of the circulation hole is achieved. During drilling fluid circulation, hydraulic pressure pushes the rotating rod and the entire adjustment device, overcoming spring force to disengage the top block from the baffle constriction, opening the circulation hole and enabling normal circulation. When pumping stops and cement slurry injection begins, the spring pushes the top block back to its original position. Its conical surface tightly fits the sealing ring against the baffle constriction, forming a double seal, effectively preventing cement slurry from flowing back into the drill pipe, ensuring the safety and quality of cementing operations.

[0022] By operating the auxiliary device, a convenient, secure, and sealed connection and disassembly between the float shoe and the drill pipe is achieved. Rotating the rotating shaft with friction grooves drives the limiting frame to move axially, squeezing the top ball and causing part of it to engage in the slot of the drill pipe. This design enables rapid locking of the float shoe and drill pipe, requiring no complex tools and simplifying operation, thus greatly improving downhole work efficiency. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a rotating self-guided baffle floating shoe provided by this utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the three-dimensional structure shown;

[0025] Figure 3 for Figure 2 The diagram shows the structure of the regulating device.

[0026] Figure 4 for Figure 1 The diagram shows the structure of the auxiliary device.

[0027] The following are the labeling elements in the diagram: 1. Floating shoe body; 2. Drill rod; 3. Rotating rod; 4. Adjusting device; 401. Fixing frame; 402. Moving block; 403. Baffle; 404. Adjusting rod; 405. Connecting ring; 406. Spring; 407. Top block; 408. Sealing ring; 409. Drive rod; 410. Embedded ring; 411. Embedded block; 412. Embedded groove; 413. Guide ring; 5. Auxiliary device; 51. Limiting frame; 52. Rotating shaft; 53. Friction groove; 54. Slot; 55. Top ball; 56. Connecting groove; 57. First sealing ring; 58. Second sealing ring; 6. Circulation hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0030] Please see Figures 1 to 4 The present invention provides a rotating self-guided baffle float shoe, comprising: a drill rod 2, a rotating rod 3 movably connected to the inner wall of the drill rod 2, a float shoe body 1 provided at one end of the drill rod 2, a plurality of circulation holes 6 opened on the arc surfaces at both ends of the float shoe body 1, an adjustment device 4 provided inside the float shoe body 1 corresponding to the rotating rod 3, and an auxiliary device 5 provided on the arc surface of the float shoe body 1 corresponding to the position of the drill rod 2.

[0031] In the embodiments of this utility model, please refer to Figure 2 and Figure 3 The adjusting device 4 includes a fixed frame 401, the surface of which is fixedly connected to the inner wall surface of the floating shoe body 1. A drive rod 409 is threaded through the inner wall surface of the fixed frame 401. An inlay ring 410 is fixedly connected to one end of the drive rod 409 near the rotating rod 3. An inlay groove 412 is formed on the surface of the inlay ring 410, and the cross section of the inlay groove 412 is cross-shaped. An inlay block 411 is fixedly connected to one end of the rotating rod 3. The surface of the inlay block 411 is inserted into the inner wall surface of the inlay groove 412. A baffle 403 is fixedly connected to one end of the inner wall of the floating shoe body 1. Adjusting rods 404 slide through both sides of the inner wall of the baffle 403. One end of the two adjusting rods 404 is fixedly connected to the same top block 407. The arc surface of the top block 407 is inserted into the inner wall of the baffle 403. The ends of the two adjusting rods 404 away from the top block 407 are fixedly connected to the same connecting ring 405. A spring 406, made of stainless steel, is fitted onto an arc-shaped surface. Both ends of the spring 406 are fixedly connected to the surfaces of a connecting ring 405 and a stop cylinder 403, respectively. A moving block 402 is fixedly connected to one end of the drive rod 409 near the connecting ring 405. A guide ring 413 is fixedly connected to the surface of an inlaid ring 410. The guide ring 413 has an flared cross-section, and its position corresponds to the position of the rotating rod 3. A top block 407 has a conical cross-section, and a sealing ring 408 is fixedly connected to its arc-shaped surface. The inner wall of the stop cylinder 403 near the top block 407 has a constricted cross-section, and the cross-sectional dimensions of the top block 407 match the inner wall cross-sectional dimensions of the stop cylinder 403. The surface of the sealing ring 408 abuts against the inner wall surface of the stop cylinder 403. The connecting ring 405 has an annular cross-section. The moving block 402 is a rubber block, and its cross-sectional dimensions match the cross-sectional dimensions of the connecting ring 405.

[0032] In the embodiments of this utility model, please refer to Figure 2 and Figure 4The auxiliary device 5 includes a rotating shaft 52. The inner wall of the rotating shaft 52 is threadedly connected to the arc surface of the float shoe body 1. A limiting frame 51 is rotatably connected to one end of the rotating shaft 52 near the drill rod 2. The inner wall of the limiting frame 51 is movably connected to the arc surface of the float shoe body 1. Several connecting grooves 56 are provided on the arc surface of the float shoe body 1 near the drill rod 2. The bottom cross-section of the connecting groove 56 is constricted. A top bead 55 abuts against the inner wall of the connecting groove 56. The upper arc surface of the top bead 55 abuts against one side of the inner wall of the limiting frame 51. The drill rod 2 has a groove 54 on its arc surface corresponding to the position of the top bead 55. The inner wall of the groove 54 is engaged with the arc surface of the top bead 55. A second sealing ring 58 is fixedly connected to the side surface of the limiting frame 51 near the drill rod 2. A first sealing ring 57 is fixedly connected to the surface of the drill rod 2 corresponding to the inner wall surface of the float shoe body 1. The inner wall of the float shoe body 1 is inserted into the arc surface of one end of the drill rod 2. A number of friction grooves 53 are opened on the arc surface of the rotating shaft 52. The number of friction grooves 53 are evenly distributed on the arc surface of the rotating shaft 52.

[0033] The working principle of the rotating self-guided baffle float provided by this utility model is as follows: During oil drilling operations, when the float body 1 is lowered into the wellbore along with the drill string, under the pre-tightening force of the internal spring 406, the pointed conical surface of the top block 407 is tightly fitted with the constricted part of the baffle 403, and a seal is formed by the sealing ring 408. At this time, the circulation hole 6 is in a closed state, preventing the drilling fluid or cuttings in the wellbore from entering the drill pipe 2. When the drill string is lowered to the target well depth and drilling fluid needs to be circulated, the surface pump is started to pump drilling fluid into the drill pipe 2. The pressure of the drilling fluid acts on the rotating rod 3 and the drive rod 409 and the moving block 402 connected to it through a cross-shaped inlay structure.

[0034] When the thrust generated by the hydraulic pressure overcomes the preload of the spring 406, the drive rod 409, the moving block 402, and the insert ring 410 in the entire adjusting device 4 begin to move towards the connecting ring 405. The movement of the drive rod 409 pushes the connecting ring 405 through the moving block 402 at its end. The connecting ring 405 drives the two adjusting rods 404, compressing the spring 406, causing the top block 407 connected to the adjusting rod 404 to disengage from the constriction of the baffle 403. After the drilling fluid circulation ends, the surface pump stops pumping, and the hydraulic pressure in the drill pipe 2 drops instantly. The spring 406 pushes the connecting ring 405, which in turn pushes the top block 407 back to its original position through the adjusting rod 404. The pointed conical surface of the top block 407 sits tightly into the constriction of the baffle 403 again, and the sealing ring 408 also adheres tightly to the inner wall of the baffle 403, forming a double seal again. The circulation hole 6 is effectively closed.

[0035] When replacing the limiting position of the float shoe body 1 after long-term use, first align the end of the float shoe body 1 with the end of the drill rod 2 with the connecting groove 56 and insert it so that the end of the drill rod 2 enters the inner cavity of the float shoe body 1. The operator manually or with a tool rotates the rotating shaft 52 of the auxiliary device 5 clockwise. Since the rotating shaft 52 and the float shoe body 1 are connected by a thread, the rotational motion is converted into linear motion. When the rotating shaft 52 rotates, it will move in a straight line towards the drill rod 2. The front end of the rotating shaft 52 is rotatably connected to the limiting frame 51. Therefore, the inward movement of the rotating shaft 52 will push the entire limiting frame 51 to translate along the arc of the float shoe body 1 towards the drill rod 2. The inclined or flat surface of the inner wall of the limiting frame 51 gradually covers the opening of the connecting groove 56. As the limiting frame 51 continues to move, its inner wall begins to squeeze the top bead 55 placed in the connecting groove 56. Since the bottom of the connecting groove 56 is constricted, the top ball 55 cannot fall downwards. The only direction of movement is radially outwards. The squeezed top ball 55 moves outwards, and its upper part is pressed by the inner wall of the limiting frame 51, while its lower part is stuck in the pre-machined groove 54 on the surface of the drill rod 2. At this time, the top ball 55 is like a "live pin", forming a solid mechanical connection point between the limiting frame 51 and the groove 54, thereby firmly locking the float shoe body 1 onto the drill rod 2.

[0036] The circuits and controls involved in this utility model are all existing technologies and will not be described in detail here.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rotating self-guiding baffle floating shoe, characterized in that, include: A drill rod (2) is movably connected to a rotating rod (3) on its inner wall. A floating shoe body (1) is provided at one end of the drill rod (2). Several circulation holes (6) are opened on the arc surfaces at both ends of the floating shoe body (1). An adjustment device (4) is provided inside the floating shoe body (1) corresponding to the rotating rod (3). The adjustment device (4) includes a fixing frame (401). The surface of the fixing frame (401) is fixedly connected to the inner wall surface of the floating shoe body (1). A drive rod (409) is threaded through the inner wall surface of the fixing frame (401). An inlay ring (410) is fixedly connected to one end of the drive rod (409) near the rotating rod (3). An inlay groove (412) is opened on the surface of the inlay ring (410). The cross section of the inlay groove (412) is cross-shaped. An inlay block (411) is fixedly connected to one end of the rotating rod (3). The surface of the block (411) is inserted into the inner wall surface of the inlay groove (412). A baffle (403) is fixedly connected to one end of the inner wall of the floating shoe body (1). Adjusting rods (404) slide through both sides of the inner wall of the baffle (403). One end of the two adjusting rods (404) is fixedly connected to the same top block (407). The arc surface of the top block (407) is inserted into the inner wall of the baffle (403). The ends of the two adjusting rods (404) away from the top block (407) are fixedly connected to the same connecting ring (405). A spring (406) is sleeved on the arc surface of the adjusting rod (404). The spring (406) is a stainless steel spring. The two ends of the spring (406) are fixedly connected to the surfaces of the connecting ring (405) and the baffle (403) respectively. A moving block (402) is fixedly connected to the end of the drive rod (409) near the connecting ring (405).

2. The rotating self-guiding baffle floating shoe according to claim 1, characterized in that, A guide ring (413) is fixedly connected to the surface of the inlaid ring (410). The cross-section of the guide ring (413) is flared, and the position of the guide ring (413) corresponds to the position of the rotating rod (3).

3. The rotating self-guiding baffle floating shoe according to claim 1, characterized in that, The top block (407) has a pointed cone-shaped cross section. A sealing ring (408) is fixedly connected to the arc surface of the top block (407). The inner wall of the baffle (403) near the top block (407) has a constricted cross section. The cross-sectional dimensions of the top block (407) are adapted to the inner wall cross-sectional dimensions of the baffle (403). The surface of the sealing ring (408) abuts against the inner wall surface of the baffle (403).

4. The rotating self-guiding baffle floating shoe according to claim 1, characterized in that, The connecting ring (405) has a circular cross-section, and the moving block (402) is a rubber block. The cross-sectional dimensions of the moving block (402) are adapted to the cross-sectional dimensions of the connecting ring (405).

5. A rotating self-guiding baffle floating shoe according to claim 1, characterized in that, An auxiliary device (5) is provided on the arc surface of the float shoe body (1) corresponding to the position of the drill rod (2). The auxiliary device (5) includes a rotating shaft (52). The inner wall of the rotating shaft (52) is threadedly connected to the arc surface of the float shoe body (1). A limit frame (51) is rotatably connected to one end of the rotating shaft (52) near the drill rod (2). The inner wall of the limit frame (51) is movably connected to the arc surface of the float shoe body (1). The float shoe body (1) is located near the... A plurality of connecting grooves (56) are provided on the arc surface of one end of the drill rod (2). The bottom section of the connecting groove (56) is constricted. The inner wall of the connecting groove (56) abuts against a top bead (55). The upper arc surface of the top bead (55) abuts against one side of the inner wall of the limiting frame (51). A slot (54) is provided on the arc surface of the drill rod (2) at the position corresponding to the top bead (55). The inner wall of the slot (54) is engaged with the arc surface of the top bead (55).

6. A rotating self-guiding baffle floating shoe according to claim 5, characterized in that, The limiting frame (51) has a second sealing ring (58) fixedly connected to the side surface near the drill rod (2), and the surface of the drill rod (2) is fixedly connected to the inner wall surface of the float shoe body (1), and the inner wall of the float shoe body (1) is inserted into the arc surface of one end of the drill rod (2).

7. A rotating self-guiding baffle floating shoe according to claim 5, characterized in that, The rotating shaft (52) has a plurality of friction grooves (53) on its arc surface, and the plurality of friction grooves (53) are evenly distributed on the arc surface of the rotating shaft (52).

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