CN211965952U - Device for processing abrasion defects of petroleum casing drilling - Google Patents
Device for processing abrasion defects of petroleum casing drilling Download PDFInfo
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- CN211965952U CN211965952U CN202020475441.8U CN202020475441U CN211965952U CN 211965952 U CN211965952 U CN 211965952U CN 202020475441 U CN202020475441 U CN 202020475441U CN 211965952 U CN211965952 U CN 211965952U
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Abstract
The utility model relates to an oil, natural gas exploitation technical field, concretely relates to device of processing oil casing well drilling wearing and tearing defect. The defect of a crescent eccentric groove caused by abrasion of the sleeve can be overcome on a common lathe. The technical scheme of the utility model comprises a lathe, wherein the lathe is provided with a center frame, a lathe tool bar and a three-jaw chuck, and also comprises a fixed eccentric hole chuck I and a fixed eccentric hole chuck II; the structure and the size of the first fixed eccentric hole chuck and the second fixed eccentric hole chuck are the same, and the structure is a circular ring with an eccentric through hole arranged at the center; the outer circle of the first fixed eccentric hole chuck is clamped tightly through a three-jaw chuck of the lathe, the outer circle of the second fixed eccentric hole chuck is clamped tightly through a supporting ball bearing of a center frame of the lathe, and the first fixed eccentric hole chuck and the second fixed eccentric hole chuck are sleeved at two ends of the sleeve sample.
Description
The technical field is as follows:
the utility model relates to an oil, natural gas exploitation technical field, concretely relates to device of processing oil casing well drilling wearing and tearing defect.
Background art:
in the process of petroleum drilling, due to the influence of various geological, engineering or drilling technical factors, a certain well deviation phenomenon exists in an actual well hole. After the drilled well is inclined, the drill string is bent in the next drilling process, and the bending degree of the drill string is consistent with the bending dog-leg degree of the well. The drill stem is driven to rotate by the kelly bar in the drilling process, and the drill bit at the lowest part of the drill stem rotates in the stratum and continuously drills into the deeper stratum. The bending of the borehole can cause abrasion to the inner wall of the casing of the last run during rotary drilling of the drill string. Eccentric abrasion is caused on the inner wall of the sleeve in the drilling process of the drill string, a crescent eccentric abrasion groove is formed on one side of the inner wall of the sleeve, and the sleeve can be abraded through if the abrasion is serious.
After the casing is worn, the internal pressure explosion resistance and the external extrusion damage resistance can be greatly reduced, the casing is easy to explode underground or damage and lose efficacy by stratum extrusion, and serious failure accidents are easy to cause. At present, no accurate theoretical formula is available at home and abroad to calculate the residual strength performance of the wear-defective casing, so that in order to more accurately research the residual strength after the wear of the well drilling casing, the full-size casing with the wear defect needs to be subjected to physical internal pressure burst strength and external pressure crushing strength performance tests. In the drilling process, due to bending of a drilled borehole and engineering geological factors, a drill rod and a casing pipe have a non-concentricity phenomenon in the drilling process to cause eccentric wear of the casing pipe, so that in order to research the external pressure and crushing resistance residual strength of the casing pipe with the wear defect, an external pressure and crushing resistance test sample with the wear defect needs to be processed. The external pressure of the abrasion defect crushes the sample, the length is more than 3500mm, and a crescent eccentric abrasion defect groove needs to be processed on the inner wall of the whole sample. For example, a sleeve sample with the outer diameter of 244.48mm is damaged by extrusion due to machining wear defects, the minimum length of the sample is 3500mm, the existing common lathe or boring machine device is difficult to meet the machining requirements, and the main technical difficulties are as follows:
(1) large-scale horizontal boring machine: the processing of eccentric orfice can be realized, but the boring machine cutter arbor is processed and is rotated at a high speed, and the length of cutter arbor all is shorter, can not satisfy the requirement of slot hole. Even if a longer nonstandard boring cutter bar is designed, the diameter of the boring cutter bar is smaller and the rigidity is weaker due to the limitation of the inner diameter size of the sleeve, and the cutter head swings greatly when the cutter bar rotates, so that the long-distance eccentric hole cannot be machined.
(2) Four-jaw chuck lathe: the four-jaw chuck can adjust the center of one end of the wear-defect sleeve to be eccentric with a lathe spindle, but the other end of the sleeve sample cannot realize fixed eccentric revolving body support, and the adjustment support end cannot be concentric with the sleeve sample at the clamping end of the four-jaw chuck, so that the machining cannot be realized.
(3) Three-jaw chuck lathe: when the three-jaw chuck is used for clamping, the center of the sleeve sample and the lathe spindle are automatically clamped to be concentric, and the eccentric clamping of the center of the sleeve sample and the center of the lathe spindle cannot be directly realized, so that the eccentric wear defect sleeve sample cannot be directly processed.
Because the petroleum casing pipe can not be taken out of the well after being fixed with the well, the residual strength of the casing pipe in the well after being worn can not be directly tested, but the engineering utilizes a multi-well wall logging instrument to measure the residual wall thickness parameter of the casing pipe after being worn. The drilling wear defect sample can be processed according to the residual wall thickness of the well casing, and then the residual strength performance test of the casing is carried out, so that the method has great guiding significance for safety evaluation and subsequent construction of the oil-gas well.
The utility model has the following contents:
in view of this, the utility model provides a device and method of processing oil casing well drilling wearing and tearing defect, it can realize processing the eccentric recess defect of sleeve pipe wearing and tearing "crescent" on the engine lathe.
In order to solve the problems in the prior art, the technical scheme of the utility model is that the device for processing the abrasion defect of the petroleum casing drilling comprises a lathe, wherein the lathe is provided with a center frame, a lathe tool rod and a three-jaw chuck, and is characterized in that: the fixture also comprises a first fixed eccentric hole clamp and a second fixed eccentric hole clamp; the structure and the size of the first fixed eccentric hole chuck and the second fixed eccentric hole chuck are the same, and the structure is a circular ring with an eccentric through hole arranged at the center;
the outer circle of the first fixed eccentric hole chuck is clamped tightly through a three-jaw chuck of the lathe, the outer circle of the second fixed eccentric hole chuck is clamped tightly through a supporting ball bearing of a center frame of the lathe, and the first fixed eccentric hole chuck and the second fixed eccentric hole chuck are sleeved at two ends of the sleeve sample.
Furthermore, two locking bolts with counter bore structures are arranged on the surfaces of the outer circles of the first fixed eccentric hole chuck and the second fixed eccentric hole chuck at the maximum eccentric distance along the radial direction, and the locking bolts are in contact with the outer circle surface of the casing sample and used for fixing the casing sample.
Compared with the prior art, the utility model has the advantages as follows:
1) the device has simple structure, and can realize the processing of the crescent eccentric groove defect of the abrasion of the sleeve with the lathe only by designing and processing two eccentric hole chuck tools;
2) the utility model has the advantages of convenient disassembly and assembly of the sleeve sample;
3) the device of the utility model saves cost, and does not need to greatly change lathe equipment;
4) the utility model discloses the eccentric hole chuck is fixed promptly to the centre gripping frock of very ingenious utilization design 2 eccentric orfices, and the biggest external diameter of the centre gripping frock of eccentric orfice can be 350mm, and longest length can be 300mm, and the internal diameter is 250mm at the utmost, and the biggest eccentricity is 25mm, and the function that can realize whole eccentric frock is got up in the centre gripping frock combination of 2 eccentric orfices, greatly reduced the processing degree of difficulty for wear and tear defect at the intraductal wall processing off-centre is simple and easy. The same function is usually satisfied, an integral eccentric hole tool with the outer diameter of 350mm, the length of 3500mm, the inner diameter of an eccentric hole of 250mm and the eccentricity of 25mm needs to be designed and processed, and the eccentric hole processing method of the integral eccentric hole tool is the same as the method of a wear defect sleeve. The weight of the raw material of the whole eccentric hole tool reaches 2643Kg, and the weight of the raw material is too heavy, so that the centrifugal force inertia is large after eccentric rotation, the three-jaw chuck of the lathe cannot be clamped tightly during machining, and the whole eccentric hole tool is difficult to machine and high in price.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the device of the present invention;
FIG. 2 is a schematic end view of a movable end eccentric hole chuck and a sleeve sample and a cutter bar;
description of reference numerals: 1-three-jaw chuck, 2-fixed eccentric hole chuck I, 3-sleeve pipe sample, 4-center frame, 5-fixed eccentric hole chuck II, 6-abrasion defect groove, 7-lathe tool bar and 8-locking bolt.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is 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 invention and are not intended to limit the invention.
The utility model discloses at first according to will processing two fixed eccentric orfice chucks with the eccentric distance of sleeve pipe center on the vertical direction according to "crescent" wear defect gyration centre of a circle for the hole circle of eccentric orfice chuck is the same with the eccentric direction and the eccentric distance of "crescent" wear defect and sleeve pipe sample with the eccentric volume of excircle. The lathe spindle is connected with the chuck to drive the fixed eccentric hole chuck, the sleeve sample and the fixed end eccentric hole chuck at the other side to form an integral revolving body, certain prefabricated eccentricity exists between the center of the sleeve sample and the excircle of the eccentric hole chuck, when the sleeve sample revolves around the center of the three-jaw chuck, the inner diameter circle track of the sleeve sample is an irregular eccentric circle, and therefore a turning tool of the lathe can intermittently process a crescent abrasion defect groove at the minimum inner diameter position of the eccentric circle at one side of the inner wall of the sleeve.
The utility model relates to a device for processing abrasion defects of petroleum casing drilling, which is shown in figure 1 and figure 2 and comprises a lathe (a central frame 4, a turning tool rod 7 and a three-jaw chuck 1 are arranged on the lathe), a fixed eccentric hole chuck I2, a central frame 4 and a fixed eccentric hole chuck II 5;
the excircle of the first fixed eccentric hole chuck 2 is clamped tightly through a three-jaw chuck 1 of a lathe, the excircle of the second fixed eccentric hole chuck 5 is clamped tightly through a supporting ball bearing of a center frame 4 of the lathe, the first fixed eccentric hole chuck 2 and the second fixed eccentric hole chuck 5 are respectively arranged at two ends of a sleeve pipe sample 3, and two end parts of the sleeve pipe sample 3 are respectively flushed with the first fixed eccentric hole chuck 2 and the second fixed eccentric hole chuck 5.
The first fixed eccentric hole chuck 2 and the second fixed eccentric hole chuck 5 are the same in structure and size, the structure is a circular ring with an eccentric through hole arranged in the center, two locking bolts 8 with counter bore structures are arranged on the surface of the maximum eccentric distance position of the outer circle along the radial direction, the locking bolts 8 are in contact with the outer circular surface of the sleeve sample 3 and are used for fixing and restraining the sleeve sample 3, and the sleeve sample 3 is prevented from rotating and axially moving in the circumferential direction when the fixed eccentric hole chuck 2 and the fixed eccentric hole chuck 5 perform rotary motion.
A method for processing abrasion defects of petroleum casing drilling comprises the following steps:
1. one end of a sleeve pipe sample 3 is arranged in an eccentric hole of a fixed eccentric hole clamp head I2, and a locking screw is fastened after the end surfaces of the sleeve pipe sample and the eccentric hole clamp head I are flush; installing the other end of the sleeve sample 3 in an eccentric hole of the fixed eccentric hole chuck II 5, rotating the adjusting angle to enable the eccentric positions and directions of the fixed eccentric hole chuck II 5 and the fixed eccentric hole chuck I2 to be consistent, adjusting the end face of the sleeve sample 4 to be flush with the end face of the fixed eccentric hole chuck II 5, and then tightly locking and fastening a bolt for moving the eccentric hole chuck II 5;
2. integrally hoisting a fixed eccentric hole chuck I2, a sleeve sample 3 and a fixed eccentric hole chuck II 5 which are assembled to a lathe, clamping the fixed eccentric hole chuck I2 by a lathe three-jaw chuck 1, dropping the fixed eccentric hole chuck II 5 in the middle of a center frame 4, and adjusting the center height of the center frame 5 to ensure that the center frame 5 is concentric with the lathe three-jaw chuck 1; lathe three-jaw chuck 1 drives fixed eccentric orfice chuck one 2, the whole solid of revolution around three-jaw chuck 1 center is constituteed to sleeve pipe sample 3 and fixed eccentric orfice chuck two 5, when lathe three-jaw chuck 1 drives fixed eccentric orfice chuck 2 and revolves, through the transmission of sleeve pipe sample 3, fixed eccentric orfice chuck two 5 is whole to revolve round three-axis chuck 1's center, because there is certain prefabricated eccentric volume in the center of sleeve pipe sample 3 and three-jaw chuck 1 center, when sleeve pipe sample 3 revolves round three-jaw chuck center 1, the internal diameter circular orbit of sleeve pipe sample 3 is an irregular eccentric circle, consequently the cutter arbor 7 can become a "crescent" wearing and tearing recess 6 at the internal diameter minimum position intermittent type turning of sleeve pipe sample 3 gyration circle.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (2)
1. The utility model provides a device of processing oil casing well drilling wearing and tearing defect, includes the lathe, is provided with centre frame (4), lathe cutter pole (7) and three-jaw chuck (1) on the lathe, its characterized in that: the fixture also comprises a first fixed eccentric hole chuck (2) and a second fixed eccentric hole chuck (5); the structure and the size of the first fixed eccentric hole chuck (2) and the second fixed eccentric hole chuck (5) are the same, and the structure is a circular ring with an eccentric through hole arranged at the center;
the outer circle of the first fixed eccentric hole chuck (2) is clamped tightly through a three-jaw chuck (1) of the lathe, the outer circle of the second fixed eccentric hole chuck (5) is clamped tightly through a supporting ball bearing of a center frame (4) of the lathe, and the two ends of the sleeve sample (3) are sleeved with the first fixed eccentric hole chuck (2) and the second fixed eccentric hole chuck (5).
2. The apparatus for processing the abrasion defect of the petroleum casing well drilling according to the claim 1, wherein: the outer circles of the first fixed eccentric hole chuck (2) and the second fixed eccentric hole chuck (5) are provided with two locking bolts (8) with counter bore structures along the radial direction on the surface of the position with the maximum eccentric distance, and the locking bolts (8) are in contact with the outer circle surface of the sleeve sample (3) and used for fixing the sleeve sample (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020475441.8U CN211965952U (en) | 2020-04-03 | 2020-04-03 | Device for processing abrasion defects of petroleum casing drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020475441.8U CN211965952U (en) | 2020-04-03 | 2020-04-03 | Device for processing abrasion defects of petroleum casing drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211965952U true CN211965952U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020475441.8U Active CN211965952U (en) | 2020-04-03 | 2020-04-03 | Device for processing abrasion defects of petroleum casing drilling |
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| Country | Link |
|---|---|
| CN (1) | CN211965952U (en) |
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2020
- 2020-04-03 CN CN202020475441.8U patent/CN211965952U/en active Active
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