Split core assembly method for petroleum drilling turntable

Abstract

The present application belongs to the technical field of rotary table core filling, and particularly relates to an assembly method of split core for a petroleum drilling rotary table, which comprises the following steps: S1, accessory pretreatment; two half core bodies and at least one pair of positioning rods are pretreated; S2, first half core preassembly; half lengths of the positioning rods are respectively inserted into corresponding positioning holes of the first half core; S3, second half core folding; the second half core is folded with the first half core, and the other half of each positioning rod is respectively inserted into corresponding positioning holes of the second half core until the first half core and the second half core are folded, and a half slip placing part on the first half core and the second half core is matched to form a slip placing part. The assembly method of the split core for the petroleum drilling rotary table ensures matching precision through pretreatment selection, realizes rapid and accurate assembly through preassembly and folding, eliminates axial movement through the positioning rods penetrating the positioning holes, and guarantees stable support of the slip through folding and forming of the half slip placing part.

Description

Technical Field

[0001] This invention belongs to the field of rotary table core-filling technology, specifically relating to an assembly method for a split-type core-filling device for oil drilling rotary tables. Background Technology

[0002] In oil drilling operations, rotary table core fillers are an important component of rotary table equipment. Their main function is to adapt to drill pipes of different sizes, ensuring that the drill pipes can rotate stably in the rotary table and achieve efficient drilling operations.

[0003] Traditional oil drilling rotary tables often employ a split-type rotary table core, which facilitates installation and maintenance to some extent. However, in actual drilling operations, due to the complex drilling environment, the split-type rotary table core is prone to vertical movement under the high-speed rotation of the rotary table and the various complex forces transmitted by the drill pipe. Once this vertical movement occurs, the normal movement of the drill pipe is greatly affected, and the drill pipe may wobble or deviate, making it impossible to maintain a vertical and stable drilling state. This, in turn, makes it difficult to guarantee the verticality of the drilling, affecting the quality of the drilling. Moreover, the increased abnormal friction between the drill pipe and the core not only accelerates the wear of the drill pipe and core, shortening their service life and increasing equipment replacement costs, but may also lead to safety accidents.

[0004] To address the aforementioned issues, existing patent CN223922979U discloses a filler core for an oil drilling rotary table. This filler core employs a structure with two symmetrically arranged half-filler core bodies and a positioning rod. By inserting half of the positioning rod into the positioning hole of one half-filler core body, and then bringing the other half-filler core body into contact with the first half-filler core body, the other half of the positioning rod is inserted into the positioning hole of the other half-filler core body, thus eliminating the relative axial displacement between the two half-filler core bodies. However, this filler core product still faces the following technical problems during actual assembly: First, the positioning holes of the two semi-core bodies require high machining accuracy. If the coaxiality of the positioning holes is insufficient, the positioning rod will not be able to be inserted smoothly, affecting the assembly efficiency and assembly quality. Second, the fit clearance between the positioning rod and the positioning hole is difficult to control precisely. If the clearance is too small, assembly will be difficult, and if the clearance is too large, movement cannot be effectively eliminated. Third, the alignment operation of the two semi-core bodies during the assembly process lacks effective process guidance, which can easily lead to misalignment of the slip half placement part due to alignment deviation, affecting the normal placement and support of the slip. Fourth, the existing assembly process lacks a systematic quality inspection method, making it difficult to detect and correct the fit defects between the positioning holes and positioning rods in a timely manner during the assembly process.

[0005] Therefore, in order to solve the above problems, it is necessary to design an assembly method for a split-type manifold for oil drilling rotary tables. Summary of the Invention

[0006] The purpose of this invention is to provide an assembly method for a split-type manifold for an oil drilling rotary table, so as to solve the technical problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides an assembly method for a split-type manifold for an oil drilling rotary table, comprising the following steps: S1. Accessory pretreatment; pretreatment of two semi-finishing core bodies and at least one pair of positioning rods; among which... The two semi-complementary core bodies are respectively named the first semi-complementary core and the second semi-complementary core; S2. Pre-installation of the first half-core: Insert half the length of each positioning rod into the corresponding positioning hole of the first half-core; S3. The second half of the core is closed; the second half of the core is closed relative to the first half of the core, and the other half of each positioning rod is inserted into the positioning hole of the second half of the core respectively, until the first half of the core and the second half of the core are closed, and the half-slip placement parts on the first half of the core and the second half of the core cooperate to form the slip placement part.

[0008] Furthermore, the semi-locking part and each positioning hole are located on opposite surfaces of the semi-complementary core body; wherein Each pair of positioning holes is located on both sides of the semi-locking part.

[0009] Furthermore, S1 also includes: S11. Clean the surface of the semi-core body and check the dimensional accuracy and surface roughness of the semi-clamp placement part; S12. Inspect the inner diameter, roundness, and coaxiality of each positioning hole, and record the inspection data; among which... When checking the coaxiality of each positioning hole, ensure that the parallelism error of the center axis of each positioning hole is less than or equal to 0.02mm.

[0010] Furthermore, S1 also includes: S13. Clean the surface of each positioning bar and check the outer diameter, straightness and cylindricity of each positioning bar.

[0011] 5. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 4, characterized in that, S1 further includes: S14. A flat portion is machined on the circumferential side of each positioning bar, and the flat portion extends along the axial direction of the positioning bar; wherein... The planar portion is formed by milling; and The machining width of the planar portion is 1 / 6 to 1 / 4 of the diameter of the positioning rod; The machining depth of the flat part is 1 / 10 to 1 / 6 of the diameter of the positioning rod.

[0012] Furthermore, each of the positioning holes has a first chamfer at its end; Each of the positioning rods has a second chamfered portion at both ends; In S2 and S3, when the positioning rod is inserted, the positioning rod is guided into the positioning hole by the cooperation of the second chamfered portion and the first chamfered portion; wherein Before the positioning rod is inserted into the positioning hole, a lubricating medium is applied to the outer surface of the positioning rod and / or the inner surface of the positioning hole.

[0013] Furthermore, it also includes: S4. Inspect the overall dimensions of the two halves of the core body after they are joined together and the fit of the two halves of the core body to each other.

[0014] Furthermore, in step S4, a feeler gauge is used to check the fit to ensure that the fit gap is no greater than 0.05 mm.

[0015] Furthermore, the method for detecting whether there is axial relative displacement between the two semi-complementary core bodies is as follows: mark lines are set on the opposite surfaces of the two semi-complementary core bodies, and the alignment of the mark lines is detected after they are closed.

[0016] Furthermore, it also includes: S5. A wear-resistant steel sleeve is embedded in the steel sleeve placement part at the top of the semi-complementary core body; S6. Install a lifting eye bolt in the first threaded hole at the top of the semi-complementary core body, and install an auxiliary lifting eye bolt in the second threaded hole on the side of the semi-complementary core body.

[0017] The beneficial effects of this invention are: (i) This invention, through the S1 component pre-processing step, cleans, measures, and selects the two half-core bodies and positioning rods, thereby ensuring the cleanliness and dimensional accuracy of each component before assembly and providing a guarantee for the smooth progress of subsequent assembly processes; through the S2 first half-core pre-assembly step, half the length of each positioning rod is inserted into the corresponding positioning holes of the first half-core, thereby simplifying the assembly operation and improving the assembly efficiency by simply aligning the second half-core with the first half-core during subsequent closing; through the S3 second half-core closing step, the second half-core is closed relative to the first half-core and the other half of each positioning rod is inserted into the corresponding positioning holes of the second half-core until the two half-core bodies are completely closed and the half-clamping parts cooperate to form the clamping parts, thereby achieving precise alignment and axial fixation of the two half-core bodies and ensuring that the clamping parts are accurately formed for normal placement and support of the clamps.

[0018] (II) This invention eliminates the relative axial (vertical) displacement of the two semi-core bodies by inserting a positioning rod into the positioning holes of the two semi-core bodies, thus preventing the core from moving up and down during operation. By setting a matching structure between the positioning rod and the positioning hole, and cooperating with the turntable to constrain the relative radial (horizontal) displacement of the two semi-core bodies, this invention completely eliminates the movement defects of traditional split-type cores, reduces core wear, and extends the service life of the cores. By setting two semi-slip placement parts to cooperate after closing to form a slip placement part, this invention achieves stable placement and reliable support of the slips, ensuring that the slips can properly hold the drill rod.

[0019] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a flowchart of a preferred embodiment of the steps of the present invention; Figure 2 This is an exploded perspective view of a preferred embodiment of the core-filling device of the present invention.

[0023] In the picture: The components include: a semi-repair core body 1, a first semi-repair core 1A, a second semi-repair core 1B, a positioning hole 11, a semi-clamp placement part 12, a first chamfer part 13, a steel sleeve placement part 14, a first threaded hole 15, and a second threaded hole 16; Positioning rod 2, flat part 21, second chamfered part 22. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0025] like Figure 1 , Figure 2 As shown, this embodiment provides an assembly method for a split-type manifold for an oil drilling rotary table, including the following steps: S1. Accessory pre-processing: Pre-processing the two semi-core bodies 1 and at least one pair of positioning rods 2; wherein the two semi-core bodies 1 are respectively named the first semi-core 1A and the second semi-core 1B. Clean the surfaces of the positioning holes 11 and positioning rods 2 on the two semi-core bodies 1 using cleaning agents and non-woven fabric to remove surface oil, iron filings, and other impurities. After cleaning, use an inside micrometer to measure the inner diameter of each positioning hole 11 on the two semi-core bodies 1, and use an outside micrometer to measure the outer diameter of each positioning rod 2, and record the measurement data. At the same time, check whether there are scratches, burrs, or other defects on the inner wall of the positioning hole 11 and the surface of the positioning rod 2. If so, use fine sandpaper or an oilstone to repair them. Based on the measurement data, select the positioning rods 2 and positioning holes 11 according to the design fit clearance requirements between them. By setting up pre-treatment steps to clean, measure, and select the parts, the cleanliness and dimensional accuracy of each part before assembly are ensured, providing a guarantee for the smooth progress of subsequent assembly processes.

[0026] S2. The first half-core 1A is pre-installed; half the length of each positioning rod 2 is inserted into the positioning hole 11 of the first half-core 1A respectively; Take the first positioning rod 2, and insert half of its length into the first positioning hole 11 of the first half-core 1A. Gently tap the end of the positioning rod 2 with a copper hammer to make the center line of the positioning rod 2 coincide with the center line of the positioning hole 11. The insertion depth of the positioning rod 2 is 1 / 2 ± 1 mm of its total length. In the same way, insert the remaining positioning rods 2 into the corresponding positioning holes 11 on the first half-core 1A. By setting a pre-assembly step, half of the positioning rod 2 is pre-inserted into the positioning hole 11 of the first half-core 1A, so that during subsequent assembly, only the second half-core 1B needs to be aligned with the first half-core 1A to complete the assembly of the positioning rod 2, simplifying the assembly operation and improving assembly efficiency.

[0027] S3. The second half of the core 1B is closed; the second half of the core 1B is closed relative to the first half of the core 1A, and the other half of each positioning rod 2 is inserted into the positioning hole 11 of the second half of the core 1B respectively, until the first half of the core 1A and the second half of the core 1B are closed, and the half-slip placement part 12 on the first half of the core 1A and the second half of the core 1B cooperates to form the slip placement part; The second half-core 1B is placed relative to the first half-core 1A, so that the opposing surfaces of the two half-core bodies 1 face each other. A centering fixture is used to center and position the two half-core bodies 1, adjusting their relative positions to align them. Simultaneously, the positioning holes 11 on the first half-core 1A are aligned with the corresponding positioning holes 11 on the second half-core 1B. The second half-core 1B is slowly moved along the closing direction, gradually bringing it closer to the first half-core 1A. During this process, the positioning rods 2 do not... The inserted half gradually enters the corresponding positioning hole 11 on the second half-core 1B; when the opposing surfaces of the two half-core bodies 1 come into contact with each other, the two half-core bodies 1 are completely closed, and each positioning rod 2 is completely inserted into the positioning hole 11 of the two half-core bodies 1. The half-slip placement parts 12 on the first half-core 1A and the second half-core 1B cooperate to form a slip placement part to place and support the slip; by setting the closing step, the two half-core bodies 1 are precisely aligned and axially fixed by the positioning rod 2, thereby forming a complete core structure.

[0028] In this embodiment, by setting the S1 component pre-processing step, the two half-core bodies 1 and the positioning rods 2 are cleaned, measured, and matched, thereby ensuring the cleanliness and dimensional accuracy of each component before assembly and providing a guarantee for the smooth progress of subsequent assembly processes. By setting the S2 first half-core pre-assembly step, half of the length of each positioning rod 2 is inserted into the corresponding positioning holes 11 of the first half-core 1A, thereby achieving the effect that when closing later, only the second half-core 1B needs to be aligned with the first half-core 1A to complete the assembly of the positioning rods 2, simplifying the assembly operation and improving the assembly efficiency. By setting the S3 second half-core closing step, the second half-core 1B is closed relative to the first half-core 1A and the other half of each positioning rod is inserted into the corresponding positioning holes 11 of the second half-core 1B, until the two half-core bodies 1 are completely closed and the half-clamp placement part 12 cooperates to form the clamp placement part, thereby achieving the precise alignment and axial fixation of the two half-core bodies 1, ensuring that the clamp placement part is accurately formed for normal placement and support of the clamp.

[0029] By inserting the positioning rod 2 into the positioning holes 11 of the two semi-filler core bodies 1, the relative axial (vertical) displacement of the two semi-filler core bodies 1 is eliminated, and the filling core is prevented from moving up and down during operation. By setting the matching structure between the positioning rod 2 and the positioning hole 11, and cooperating with the turntable to constrain the relative radial (horizontal) displacement of the two semi-filler core bodies 1, the movement defects of traditional split filling cores are completely eliminated, filling core wear is reduced, and the service life of filling cores is extended. By setting the two semi-slip placement parts 12 to cooperate after closing to form a slip placement part, the slip is stably placed and reliably supported, ensuring that the slip can properly hold the drill rod.

[0030] The semi-clamp placement part 12 and each positioning hole 11 are located on opposite surfaces of the semi-filler body 1; wherein each pair of positioning holes 11 is located on both sides of the semi-clamp placement part 12; wherein by symmetrically arranging the positioning holes 11, the constraint forces applied by the two positioning rods 2 to the two semi-filler bodies 1 after insertion are symmetrical and balanced, thereby avoiding off-center loading caused by unilateral positioning constraints, and achieving the effect of improving the overall structural symmetry and stability of the filler after closure.

[0031] S1 further includes: S11. Clean the surface of the semi-core body 1 and check the dimensional accuracy and surface roughness of the semi-clamp placement part 12. After thoroughly cleaning the surface of the semi-core body 1 with a cleaning agent, use a coordinate measuring machine to check the dimensional accuracy of the semi-clamp placement part 12 and use a surface roughness meter to check the surface roughness of the semi-clamp placement part 12 to ensure that the dimensional accuracy of the semi-clamp placement part 12 meets the design requirements and the surface roughness Ra≤1.6μm, so as to ensure the fitting accuracy and contact stability between the semi-clamp and the clamp placement part 12 after the clamp is installed.

[0032] In this embodiment, by setting step S11, the dimensional accuracy and surface roughness of the semi-clamp placement part 12 are tested before assembly, thereby ensuring that the fitting accuracy between the semi-clamp placement part 12 and the clamp meets the design requirements, thus achieving the effect of ensuring stable contact after clamp placement and avoiding clamp shaking or support failure due to dimensional deviation of the clamp placement part.

[0033] S12. Inspect the inner diameter, roundness, and coaxiality of each positioning hole 11 and record the inspection data. When inspecting the coaxiality of each positioning hole 11, ensure that the parallelism error of the central axis of each positioning hole 11 is less than or equal to 0.02 mm. Use an inside micrometer to inspect the inner diameter of each positioning hole 11, a roundness meter to inspect the roundness of each positioning hole 11, and a coordinate measuring machine to inspect the coaxiality of each positioning hole 11. When inspecting the coaxiality of each positioning hole 11, use the central axis of the first positioning hole 11 on the first half-core 1A as the reference axis and measure the parallelism error of the central axis of the remaining positioning holes 11 relative to the reference axis, ensuring that the parallelism error is less than or equal to 0.02 mm. For each positioning hole 11 on the second half-core 1B, also inspect it using the corresponding reference to ensure that the central axes of each positioning hole 11 on the two half-core bodies 1 are parallel to each other. Record all inspection data and archive it as the basis for subsequent selection of qualified positioning rods 2.

[0034] In this embodiment, by setting step S12, the inner diameter, roundness, and coaxiality of each positioning hole 11 are individually inspected and the data are recorded. This allows for a comprehensive understanding of the machining quality of each positioning hole 11 before assembly, providing accurate data support for the subsequent selection of positioning rods 3 and preventing assembly failure due to out-of-tolerance dimensions of the positioning holes 11. By setting the control requirement in step S12 that the parallelism error of the central axis of each positioning hole 11 is less than or equal to 0.02mm, it is ensured that the central axes of each positioning hole 11 on the two semi-complementary core bodies 1 meet the parallelism requirement before closing. This ensures that each positioning rod 2 can be inserted synchronously and smoothly into the corresponding positioning hole 11 during the subsequent closing process, avoiding jamming or uneven loading of the positioning rod 2 due to non-parallelism of the positioning hole 11 axes.

[0035] S1 further includes: S13. Clean the surface of each positioning rod 2 and check the outer diameter, straightness, and cylindricity of each positioning rod 2; thoroughly clean the surface of each positioning rod 2 with detergent and non-woven cloth to remove rust-preventive oil, oxide layer, and other attachments, and wipe it dry with a lint-free cloth after cleaning; use an outside micrometer to take at least three sections (both ends and the middle position) along the axial direction of the positioning rod 2, and measure at least three points along the circumference of each section, and record the outer diameter data at each point; use a V-block with a dial indicator to check the straightness of each positioning rod 2, and place the positioning rod 2 on two V-blocks of equal height. Rotate the positioning rod 2 and use a dial indicator to measure the radial runout of its outer circular surface. The runout amount is the straightness error. Ensure that the straightness error is less than or equal to 0.015mm. Use a cylindricity tester to check the cylindricity of each positioning rod 2 and ensure that the cylindricity error is less than or equal to 0.01mm. After the test is completed, compare the test data with the test data of the positioning hole 11 recorded in S12. Match and select according to the design fit clearance requirements between the positioning rod 2 and the positioning hole 11, and eliminate the out-of-tolerance positioning rod 2 to ensure that the fit between the selected positioning rod 2 and the positioning hole 11 meets the design requirements.

[0036] S1 further includes: S14. A flat portion 21 is machined on the circumferential side surface of each positioning rod 2, and the flat portion 21 extends along the axial direction of the positioning rod 2; wherein the flat portion 21 is formed by milling; and the machining width of the flat portion 21 is 1 / 6 to 1 / 4 of the diameter of the positioning rod 2; the machining depth of the flat portion 21 is 1 / 10 to 1 / 6 of the diameter of the positioning rod 2; the flat portion 21 is machined axially on the circumferential side surface of each positioning rod 2 using a vertical milling machine or a horizontal milling machine; specifically, the positioning rod 2 is clamped on a milling machine fixture, and a face milling cutter or a cylindrical milling cutter is used to feed along the axial direction of the positioning rod 2 to mill away a portion of the material on the circumferential side surface of the positioning rod 2, forming a flat portion 21 parallel to the central axis of the positioning rod 2; during machining The width and depth parameters of the planar portion 21 are determined according to the actual diameter of the positioning rod 2: if the diameter of the positioning rod 2 is D, the machining width of the planar portion 21 is controlled within the range of D×1 / 6 to D×1 / 4, and the machining depth is controlled within the range of D×1 / 10 to D×1 / 6. Taking the diameter of the positioning rod 2 D=30mm as an example, the width of the planar portion 21 is 5mm to 7.5mm, and the depth is 3mm to 5mm. After the planar portion 21 on each positioning rod 2 is milled, the edges of the planar portion 21 are chamfered with a chamfer size of 0.5mm×45° to remove burrs and sharp edges. In subsequent assembly, the planar portion 21 forms a gap channel with the inner wall of the positioning hole 11, which plays the role of venting and chip removal.

[0037] Each of the positioning holes 11 has a first chamfered portion 13 at its end; each of the positioning rods 2 has a second chamfered portion 22 at both ends; in S2 and S3, when the positioning rod 2 is inserted, the positioning rod 2 is guided into the positioning hole 11 by the cooperation and guidance of the second chamfered portion 22 and the first chamfered portion 13; before the positioning rod 2 is inserted into the positioning hole 11, a lubricating medium is coated on the outer surface of the positioning rod 2 and / or the inner surface of the positioning hole 11; each positioning hole 11 has a first chamfered portion 13 at its end, the chamfer angle of the first chamfered portion 13 is 20° to 45°, and the chamfer depth is 1mm to 3mm; each positioning rod 2 has a second chamfered portion 22 at both ends, the chamfer angle of the second chamfered portion 22 is 20° to 45°, and the chamfer length is 2mm to 5mm; the chamfer angles of the first chamfered portion 13 and the second chamfered portion 22 are matched with each other, preferably, the chamfer angle of the second chamfered portion 22 is slightly smaller than the chamfer angle of the first chamfered portion 13, so as to To ensure that the second chamfered portion 22 can smoothly enter the guiding range of the first chamfered portion 13 during the insertion process; in S2 (pre-installation of the first half-core 1A) and S3 (closing of the second half-core 1B), before inserting the positioning rod 2, a lubricating medium (such as molybdenum disulfide grease, graphite grease or extreme pressure lithium-based grease) is uniformly coated on the outer surface of the positioning rod 2, with a coating thickness of 0.01mm to 0.03mm, or a lubricating medium is uniformly coated on the inner surface of the positioning hole 11, or both are coated simultaneously; after coating, the second chamfered portion 22 at the end of the positioning rod 2 is aligned with the first chamfered portion 13 at the end of the positioning hole 11. The second chamfered portion 22 first contacts the inclined surface of the first chamfered portion 13. Under the action of thrust, the second chamfered portion 22 slides along the inclined surface of the first chamfered portion 13, automatically guiding the end of the positioning rod 2 to the center position of the positioning hole 11. Then, the positioning rod 2 smoothly enters the interior of the positioning hole 11 under the guiding action until it is inserted into place.

[0038] S4. Inspect the overall dimensions of the two halves of the core body 1 after they are joined together and the fit of the opposite surfaces of the two halves of the core body 1. After S3 (joining the second half of the core body 1B), proceed to the S4 inspection step. Use a vernier caliper or outside micrometer to inspect the overall external dimensions of the two halves of the core body 1 after they are joined together, including the total length, total width, and total height of the joined body, to ensure that the overall dimensions meet the requirements of the design drawings and the tolerance is controlled within ±0.5mm. Use a right-angle ruler and feeler gauge to inspect the fit of the opposite surfaces of the two halves of the core body 1. Specifically, place the reference surface of the right-angle ruler against the outer surface of one half of the core body 1. Use a feeler gauge to check the gap between the contact surfaces of the two semi-core bodies 1. Select at least three measurement points (both ends and the middle position) along the entire length of the contact surface to ensure that the gap at each measurement point is less than 0.05mm. At the same time, use a dial indicator to check the height difference between the upper surfaces of the two semi-core bodies 1 to ensure that the height difference between the upper surfaces of the two semi-core bodies 1 does not exceed 0.1mm. Record and archive all test data. If the test results do not meet the requirements, it is judged as unqualified assembly. It is necessary to disassemble and check the fit between the positioning rod 2 and the positioning hole 11. After finding out the cause, repeat steps S2 and S3.

[0039] In step S4, a feeler gauge is used to check the fit to ensure that the fit gap is no greater than 0.05mm. By using a feeler gauge to quantitatively check the fit of the two semi-core bodies 1, and using 0.05mm as the pass / fail threshold, the fit test results are objective and quantifiable, thereby avoiding subjective errors caused by relying solely on visual or tactile judgment, and achieving the effect of improving the accuracy and consistency of the test.

[0040] The method for detecting whether there is axial relative displacement between the two semi-core bodies 1 is as follows: mark lines are set on the opposite surfaces of the two semi-core bodies 1, and the alignment of the mark lines is checked after they are closed. By setting mark lines on the opposite surfaces of the two semi-core bodies 1, the alignment of the mark lines after they are closed can be directly used to determine whether there is axial relative displacement between the two semi-core bodies 1. This allows for rapid detection without the need for precision measuring instruments, thereby reducing the difficulty of detection and improving detection efficiency.

[0041] S5. A wear-resistant steel sleeve is embedded in the steel sleeve placement part 14 at the top of the semi-repair core body 1. By setting step S5 to embed a wear-resistant steel sleeve in the steel sleeve placement part 14 at the top of the semi-repair core body 1, the wear-resistant steel sleeve bears the friction of the easily worn parts that come into contact with the drill pipe at the top of the repair core, thereby reducing the wear on the base material of the semi-repair core body 1 and extending the overall service life of the repair core.

[0042] S6. Install a lifting eye bolt in the first threaded hole 15 at the top of the semi-complementary core body 1, and install an auxiliary lifting eye bolt in the second threaded hole 16 on the side of the semi-complementary core body 1. By setting step S6 to install the lifting eye bolt in the first threaded hole 15, a convenient lifting connection point is provided for the overall lifting and lowering of the complement, achieving the effect of facilitating the loading and unloading of the complement in the turntable. By setting the auxiliary lifting eye bolt in the second threaded hole 16, the lifting posture of the complement can be adjusted by operating the auxiliary lifting eye bolt during the lifting process, so that the complement can remain horizontal when it is loaded into the inner hole of the turntable, avoiding tilting and jamming, thereby improving the lifting safety and assembly convenience.

[0043] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0044] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0045] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for assembling a split-type manifold for an oil drilling rotary table, characterized in that, Includes the following steps: S1. Pre-treatment of accessories; pre-treatment of two semi-core bodies (1) and at least one pair of positioning rods (2); in The two semi-complementary core bodies (1) are respectively named the first semi-complementary core (1A) and the second semi-complementary core (1B); S2. The first half-core (1A) is pre-installed; half the length of each positioning rod (2) is inserted into the positioning hole (11) of the first half-core (1A); S3. The second half-core (1B) is closed; the second half-core (1B) and the first half-core (1A) are closed relative to each other, and the other half of each positioning rod (2) is inserted into the positioning hole (11) of the second half-core (1B) respectively, until the first half-core (1A) and the second half-core (1B) are closed, and the half-slip placement part (12) on the first half-core (1A) and the second half-core (1B) cooperate to form the slip placement part.

2. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 1, characterized in that, The semi-locking part (12) and each positioning hole (11) are located on opposite surfaces of the semi-filler body (1); wherein Each pair of positioning holes (11) is located on both sides of the semi-locking part (12).

3. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 2, characterized in that, S1 further includes: S11. Clean the surface of the semi-core body (1) and check the dimensional accuracy and surface roughness of the semi-clamp placement part (12); S12. Inspect the inner diameter, roundness, and coaxiality of each positioning hole (11), and record the inspection data; among which When checking the coaxiality of each positioning hole (11), ensure that the parallelism error of the central axis of each positioning hole (11) is less than or equal to 0.02mm.

4. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 3, characterized in that, S1 further includes: S13. Clean the surface of each positioning bar (2) and check the outer diameter, straightness and cylindricity of each positioning bar (2).

5. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 4, characterized in that, S1 further includes: S14. A flat portion (21) is machined on the circumferential side of each positioning bar (2), and the flat portion (21) extends along the axial direction of the positioning bar (2); wherein The planar portion (21) is formed by milling; and The machining width of the flat part (21) is 1 / 6 to 1 / 4 of the diameter of the positioning rod (2); The machining depth of the flat part (21) is 1 / 10 to 1 / 6 of the diameter of the positioning rod (2).

6. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 5, characterized in that, Each of the positioning holes (11) has a first chamfer (13) at its end; Each of the positioning rods (2) has a second chamfered portion (22) at both ends; In S2 and S3, when the positioning rod (2) is inserted, the positioning rod (2) is guided into the positioning hole (11) by the cooperation of the second chamfered part (22) and the first chamfered part (13); wherein Before the positioning rod (2) is inserted into the positioning hole (11), a lubricating medium is applied to the outer surface of the positioning rod (2) and / or the inner surface of the positioning hole (11).

7. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 6, characterized in that, Also includes: S4. Detect the overall size of the two halves of the core body (1) after they are joined together and the fit of the two halves of the core body (1) to the opposite side.

8. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 7, characterized in that, In step S4, a feeler gauge is used to check the fit to ensure that the fit gap is no greater than 0.05 mm.

9. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 8, characterized in that, The method for detecting whether there is an axial relative displacement between the two semi-complementary core bodies (1) is as follows: mark lines are set on the opposite surfaces of the two semi-complementary core bodies (1), and the mark lines are checked for alignment after they are closed.

10. The assembly method of the split-type manifold for oil drilling rotary table as described in claim 9, characterized in that, Also includes: S5. A wear-resistant steel sleeve is embedded in the steel sleeve placement part (14) at the top of the semi-complementary core body (1); S6. Install a lifting eye bolt in the first threaded hole (15) on the top of the semi-complementary core body (1), and install an auxiliary lifting eye bolt in the second threaded hole (16) on the side of the semi-complementary core body (1).

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