Grinding disc type strip-shaped metal filing cutting and smashing device
By designing a grinding disc-type strip metal chip cutting and crushing device, the relative rotation between the dynamic grinding sleeve and the fixed grinding sleeve and the dynamic shearing cooperation of the cutting blades, the mud recovery pipeline blockage caused by strip metal chips in oil field production is solved, and the normal progress and cost savings of oil field production are achieved.
Patent Information
- Application Number
- CN202421518296.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-30
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-30
AI Technical Summary
In oil field production, strip metal chips are prone to hooking and tangling during the floating process, resulting in blockage of mud recovery pipelines, affecting oil field production efficiency and increasing costs.
A grinding disc type strip metal chip cutting and crushing device is designed, which uses the relative rotation between the dynamic grinding sleeve and the fixed grinding sleeve, and the dynamic shearing cooperation between the cutting blades to shear and crush the strip metal chip flowing through the well fluid reflux channel.
It effectively avoids hooking and winding of strip metal chips, prevents mud recovery pipelines from blocking, ensures the normal progress of oil field salvage and well repair operations, improves production efficiency and saves costs.
Smart Images
Figure CN222969944U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of metal chip crushing devices, and particularly relates to a grinding disc type strip-shaped metal chip cutting and crushing device. Background Technique
[0002] In oilfield production, sometimes during fishing operations, it is necessary to mill the irregular fish head to improve the fishing efficiency of the downhole fish. Sometimes during workover operations to replace downhole casing or tubing, it is necessary to machine the downhole casing, tubing or packer. Inevitably, a lot of strip-shaped metal chips will be generated during the milling of the fish and the cutting-type cutting of downhole casing and tubing. Some of them may have a relatively long length. During fishing or workover operations, these strip-shaped metal chips will float up to the wellhead ground along with the return flow of the mud well fluid. Since it is extremely easy for the strip-shaped metal chips to hook and entangle with each other during the floating process, and continuously adsorb other impurities in the mud well fluid to gradually increase the mass of the agglomerate. Therefore, after floating to the ground, it is very likely to hook in the relatively narrow-diameter mud recovery pipeline on the ground, reducing the drainage flow of the mud recovery pipeline or even completely blocking the mud recovery pipeline, making the mud well fluid unable to circulate normally. Once the mud recovery pipeline is completely blocked, it is necessary to immediately shut down the mud pump and the drilling rig and disassemble the mud recovery pipeline to maintain and clean the mud recovery pipeline. This undoubtedly increases the labor intensity of oilfield production operations. More importantly, it causes the fishing operation and workover operation to be interrupted abnormally, resulting in production accidents, which not only has a very adverse impact on the oilfield production efficiency, but also greatly increases the production cost investment of the oilfield, causing unnecessary waste. Therefore, it is necessary to research and develop auxiliary tool facilities that are used in conjunction with oilfield milling fishing tools and mechanical workover tools to solve the existing technical problems and ensure the normal progress of oilfield production. Content of the Utility Model
[0003] The purpose of the utility model is to provide a grinding disc type strip-shaped metal chip cutting and crushing device, which is used in conjunction with oilfield milling fishing tools or cutting-type workover tools to ensure the normal progress of oilfield fishing operations and workover operations.
[0004] A grinding disc type bar-shaped metal chip cutting and crushing device, comprising: an upper joint, a fixed grinding sleeve, a movable grinding sleeve, a lower joint and a friction block; the upper joint and the lower joint are fixedly connected up and down to form a structural body, and mechanical connection structures are respectively arranged at the upper end of the upper joint and the lower end of the lower joint for connecting the structural body to a drill pipe of a drilling tool. A limiting shoulder is arranged on the lower joint, and the fixed grinding sleeve and the movable grinding sleeve are correspondingly combined and sleeved on the lower joint, and the upper and lower ends in the axial direction are respectively limited by the lower end surface of the upper joint and the limiting shoulder on the lower joint. Among them: the movable grinding sleeve is fixedly connected to the lower joint, and the fixed grinding sleeve can rotate coaxially relative to the lower joint; the fixed grinding sleeve and the movable grinding sleeve respectively have grinding surfaces that form a contact fit, and cutting wedges are respectively arranged on the grinding surfaces. Axially through well fluid return channels are respectively opened between the cutting wedges, and cutting blades are respectively embedded on the cutting wedges. The cutting blades embedded on the movable grinding sleeve and the fixed grinding sleeve can correspond to each other to form a dynamic shearing fit. When the movable grinding sleeve rotates relative to the fixed grinding sleeve, the mutually cooperating cutting blades can shear the bar-shaped metal chips generated by milling or cutting operations doped in the well fluid flowing through the well fluid return channel; at the same time, the friction block is embedded on the fixed grinding sleeve, the friction block has a spherical convex surface, is limited by a limit pin, and is pushed by a brake spring, so that the spherical convex surface on the friction block can elastically protrude from the outer circumferential surface of the fixed grinding sleeve and can be integrally retracted into the embedding groove of the friction block by overcoming the horizontal elastic acting force of the brake spring under the action of a radial force.
[0005] Preferably, a pressure spring is arranged between the upper joint and the combined body formed by the fixed grinding sleeve and the movable grinding sleeve of the grinding disc type bar-shaped metal chip cutting and crushing device. The pressure spring is sleeved on the upper joint and applies an elastic acting force to the combined body formed by the fixed grinding sleeve and the movable grinding sleeve to enhance the tightness and stability of the contact fit between the grinding surfaces of the fixed grinding sleeve and the movable grinding sleeve. At the same time, a protective sleeve is installed outside the pressure spring, and the protective sleeve is fixedly connected to the upper joint to perform functional protection on the pressure spring.
[0006] Preferably, different numbers of the cutting wedges are respectively arranged on the grinding surfaces of the fixed grinding sleeve and the movable grinding sleeve of the grinding disc type bar-shaped metal chip cutting and crushing device to avoid the phenomenon that the cutting wedges on the fixed grinding sleeve and the movable grinding sleeve are staggered when the numbers are the same, resulting in the complete closure of the well fluid return channel, so that the well fluid return channel can always maintain a connected state during the working state, ensuring the normal circulation of the mud well fluid.
[0007] In the described disc-type bar-shaped metal chip cutting and pulverizing device, it is preferably provided with a friction bearing between the mating surfaces of the fixed grinding sleeve and the lower joint to reduce the frictional resistance of the relative movement of the fixed grinding sleeve with respect to the lower joint, and enhance the reliability and stability of function realization.
[0008] The beneficial effects of the present utility model are to provide a disc-type bar-shaped metal chip cutting and pulverizing device, which is used in conjunction with an oilfield overshot or a cutting-type workover tool. By utilizing the relative rotation between the corresponding moving grinding sleeve and the fixed grinding sleeve, the cutting blades embedded on the moving grinding sleeve and the fixed grinding sleeve can correspond to each other to form a dynamic shearing fit, shearing the bar-shaped metal chips generated by milling or cutting operations doped in the well fluid flowing through the well fluid return channel, solving the problem that the bar-shaped metal chips are easily hooked, entangled and agglomerated to block the ground mud recovery pipeline, and being applied to oilfield production to avoid the phenomenon that the overshot or workover operation is abnormally interrupted due to the blockage of the mud recovery pipeline, ensuring the normal progress of the oilfield overshot operation and the workover operation, improving the oilfield production efficiency, and saving the oilfield production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural diagram of the disc-type bar-shaped metal chip cutting and pulverizing device.
[0010] Figure 2 It is Figure 1 a sectional view taken along line A-A in
[0011] Figure 3 It is Figure 1 a sectional view taken along line B-B in
[0012] Figure 4 It is Figure 1 a sectional view taken along line C-C in
[0013] Wherein: 1 is the upper joint, 2 is the protective sleeve, 3 is the fixed grinding sleeve, 4 is the moving grinding sleeve, 5 is the lower joint, 6 is the friction block, 7 is the brake spring, 8 is the cutting blade, 9 is the pressure spring, 10 is the friction bearing, 11 is the cutting wedge, 12 is the limit pin, and 13 is the well fluid return channel. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] Furthermore, in combination with specific embodiments and their accompanying drawings, a detailed description is made of the technical solution claimed in the present utility model.
[0015] A disc-type bar-shaped metal chip cutting and pulverizing device, as Figures 1 to 4It is composed of an upper joint 1, a protective sleeve 2, a fixed grinding sleeve 3, a movable grinding sleeve 4, a lower joint 5, friction blocks 6, a braking spring 7, a pressure spring 9 and a friction bearing 10. The upper joint 1 and the lower joint 5 are connected by screw thread. A limiting shoulder is provided on the lower joint 5. The fixed grinding sleeve 3 and the movable grinding sleeve 4 are combined and sleeved on the lower joint 5 up and down. The upper end of the fixed grinding sleeve 3 is limited by the lower end face of the upper joint 1, and the lower end of the movable grinding sleeve 4 is limited by the limiting shoulder on the lower joint 5, so that the grinding surfaces at the lower end of the fixed grinding sleeve 3 and the upper end of the movable grinding sleeve 4 are in contact and cooperation with each other. A pressure spring 9 is arranged between the upper joint 1 and the fixed grinding sleeve 3. The pressure spring 9 is sleeved on the upper joint 1 and applies an elastic force to the fixed grinding sleeve 3. A protective sleeve 2 is installed outside the pressure spring 9. The protective sleeve 2 is fixedly connected to the upper joint 1. Two groups of the friction bearings 10 are installed between the mating surfaces of the fixed grinding sleeve 3 and the lower joint 5 to keep the fixed grinding sleeve 3 and the lower joint 5 in a stable structural cooperation and can rotate smoothly relative to the lower joint 5. The movable grinding sleeve 4 is fixedly connected to the lower joint 5. Three cutting wedges 11 axially penetrating the fixed grinding sleeve 3 are provided on the fixed grinding sleeve 3. Four cutting wedges 11 axially penetrating the movable grinding sleeve 4 are provided on the movable grinding sleeve 4. The spaces between the cutting wedges 11 are axially penetrating well fluid return channels 13. Cutting blades 8 are respectively embedded on the grinding surfaces of each of the cutting wedges 11. The cutting blades 8 on the movable grinding sleeve 4 and the fixed grinding sleeve 3 correspond to form a dynamic shearing cooperation. Cylindrical embedding grooves are respectively opened on the outer circumferential surfaces of the three cutting wedges 11 on the fixed grinding sleeve 3. The friction blocks 6 are respectively pushed and supported by the braking spring 7 and embedded in the embedding grooves. The front end of the friction block 6 has a spherical convex surface, and an annular limiting groove is opened on the circumferential surface. Each embedding groove is equipped with two limiting pins 12. The limiting pins 12 are correspondingly installed on both sides of the cutting wedge 11, and the ends extend into the embedding groove and form a limiting cooperation with the annular limiting groove, limiting that the friction block 6 can move radially along the embedding groove within the limit range of the annular limiting groove, so that the spherical convex surface on the friction block 6 can protrude from the outer circumferential surface of the fixed grinding sleeve 3 or be completely retracted into the embedding groove.
[0016] The disc-type bar-shaped metal chip cutting and crushing device described in this embodiment is an auxiliary tool facility specifically used in conjunction with oilfield over-milling fishing tools and cutting-type workover tools. During use, it is connected and installed at the upper end of the over-milling fishing tool or the cutting-type workover tool and is lowered into the well along with the drill string. In the oil well, the friction block 6 is moderately retracted under the action of the oil well casing wall, overcoming the elastic force of the brake spring 7. Conversely, the elastic force of the brake spring 7 acts on the friction block 6, causing the friction block 6 to be pressed against the wall of the oil well casing and generating a frictional resistance of relative movement between the friction block 6 and the oil well casing. When the drill string rotates to drive the over-milling fishing tool or the cutting-type workover tool to perform work operations, the bar-shaped metal chips generated by over-milling the fish or cutting the casing will float upward with the flowing back mud well fluid. At the same time, during the rotation of the drill string, since the upper joint 1, the lower joint 5, and the moving grinding sleeve 4 fixedly connected to the lower joint 5 rotate together with the drill string, and the fixed grinding sleeve 3 remains stationary relative to the oil well casing under the action of the frictional resistance between the friction block 6 and the wall of the oil well casing, relative movement is generated between the moving grinding sleeve 4 and the fixed grinding sleeve 3. The cooperation and shearing between the cutting blades 8 on the moving grinding sleeve 4 and the fixed grinding sleeve 3 can cut and crush the bar-shaped metal chips mixed in the mud well fluid flowing through the contact and grinding surface between the moving grinding sleeve 4 and the fixed grinding sleeve 3, effectively avoiding the occurrence of the phenomenon that the bar-shaped metal chips surge to the ground and block the mud recovery port, and solving the problems of the prior art.
Claims
1. A grinding disc type strip metal chip cutting and crushing device, characterized in that: include: An upper joint (1), a fixed grinding sleeve (3), a movable grinding sleeve (4), a lower joint (5) and a friction block (6); the upper joint (1) and the lower joint (5) are fixedly connected up and down to form a structural main body; a mechanical connection structure is respectively provided at the upper end of the upper joint (1) and the lower end of the lower joint (5); a limiting shoulder is provided on the lower joint (5); the fixed grinding sleeve (3) and the movable grinding sleeve (4) are correspondingly assembled and fitted on the lower joint (5); the upper and lower ends of the axial direction are respectively limited by the lower end surface of the upper joint (1) and the limiting shoulder on the lower joint (5); wherein: the movable grinding sleeve (4) is fixedly connected to the lower joint (5), and the fixed grinding sleeve (3) can rotate coaxially relative to the lower joint (5); The fixed grinding sleeve (3) and the movable grinding sleeve (4) respectively have grinding surfaces for forming a contact fit, cutting wedges (11) are respectively arranged on the grinding surfaces, and axially penetrating well fluid return channels are respectively opened between the cutting wedges (11), and cutting blades (8) are respectively embedded on the cutting wedges (11), and the cutting blades (8) embedded on the movable grinding sleeve (4) and the fixed grinding sleeve (3) can correspond to each other to form a dynamic shear fit; at the same time, the friction block (6) is embedded on the fixed grinding sleeve (3), and the friction block (6) has a spherical convex surface, which is limited by a limit pin (12) and is pushed by a brake spring (7) so that the spherical convex surface on the friction block (6) can elastically protrude from the outer circumferential surface of the fixed grinding sleeve (3).
2. A grinding disc type strip metal chip cutting and crushing device as claimed in claim 1, characterized in that: A pressure spring (9) is arranged between the upper joint (1) and a combination of the fixed grinding sleeve (3) and the movable grinding sleeve (4); the pressure spring (9) is sleeved on the upper joint (1); a protective sleeve (2) is arranged and installed outside the pressure spring (9); the protective sleeve (2) is fixedly connected to the upper joint (1).
3. A grinding disc type strip metal chip cutting and crushing device as claimed in claim 1 or 2, characterized in that: Different numbers of the cutting wedges are respectively arranged on the grinding surfaces of the fixed grinding sleeve (3) and the dynamic grinding sleeve (4).
4. A grinding disc type strip metal chip cutting and crushing device as claimed in claim 3, characterized in that: A friction bearing (10) is arranged and installed between the matching surfaces of the fixed grinding sleeve (3) and the lower joint (5).