CN114322716A - Correction instrument for detecting contour error of upper sealing surface of threaded oil sleeve and correction method thereof - Google Patents
Correction instrument for detecting contour error of upper sealing surface of threaded oil sleeve and correction method thereof Download PDFInfo
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- CN114322716A CN114322716A CN202011046227.1A CN202011046227A CN114322716A CN 114322716 A CN114322716 A CN 114322716A CN 202011046227 A CN202011046227 A CN 202011046227A CN 114322716 A CN114322716 A CN 114322716A
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- contact type
- diameter measuring
- pipe body
- measuring gauge
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- 238000007789 sealing Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012937 correction Methods 0.000 title claims description 15
- 238000007514 turning Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001915 proofreading effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Abstract
The invention discloses a calibrator for detecting contour errors of a sealing surface on a threaded oil sleeve and a calibration method thereof, wherein the calibrator comprises a base, a pair of measuring arms are arranged on the base, the outer side surfaces of the measuring arms are working surfaces, and the top surfaces of the measuring arms are reference surfaces; the working surface is provided with a sealing conical surface correcting surface and a cylindrical surface correcting surface adjacent to the sealing conical surface correcting surface. The invention can effectively judge whether the lathe loses motion in the process of turning the sealing curved surface of the pipe body, thereby causing reverse clearance errors.
Description
Technical Field
The invention relates to a pipe body thread machining technology of a threaded joint oil casing pipe for petroleum and natural gas, in particular to a calibrator for detecting contour errors of a sealing surface on a threaded oil casing pipe and a calibration method thereof.
Background
The oil casing product is a material which must be used for the exploration and development of petroleum and natural gas, and each pipe is connected into a pipe column through threads to form a mining channel. At present, the threaded connection forms adopted by oil casing products generally comprise two types, one type is a standard connection form (mainly comprising BTC, LC, SC, EU, NU and the like) corresponding to API SPEC 5B issued by the American Petroleum institute, and the other type is a special threaded connection form with high sealing capability. The special threaded joint is provided with a nose end (generally called a sealing surface) at the front end of the thread, and the sealing surface between the male thread and the female thread plays a role in sealing high-pressure medium in a pipe through interference fit, so for the special threaded joint, the conformity of the contour shape and the size of the sealing surface is extremely important, and the sealing capability of a product is directly influenced.
At present, the quality of a sealing surface is ensured by a pipe factory through parameter measurement and die stamping. Wherein, the parameter measurement is mainly to directly measure the diameter size of the sealing surface by a gauge and a calibration seat frame; the die is mainly used for rubbing the outline shape of a sealing surface through high-precision plasticine, slicing, and then performing contrast inspection with a standard template after being amplified by an optical microscope. Because of the long time required for the die and the hysteresis of the inspection, the quality is mainly controlled by measuring the parameters of the sealing surface in the process that the factory only uses the die as the first inspection in production.
Referring to fig. 1, the machining of the sealing surface is performed by turning the tool 1 by tracing, and in this process, the numerically controlled lathe is switched in one direction in the axial direction, and if a reverse gap exists in a ball screw nut pair of the lathe or the like, errors of the size (the size of the sealing conical surface 2 and the size of the transition cylindrical surface 2) and the appearance of the curve are easily formed. However, the conventional parameter measurement is a point measurement mode, and the morphology error caused by the reverse gap cannot be detected, which undoubtedly causes great hidden danger to the product quality.
Referring to fig. 2, the normal machining of the sealing surface profile 100 is indicated by the arrow in fig. 2, when the lathe has a reverse clearance, the machining shape indicated by the arrow 101 in fig. 2 is very likely to occur, and when the conventional point-like measurement method of the sealing surface is adopted, the measurement point is point a in fig. 2, which shows that the sealing surface is small. The operator would adjust the shim to raise the machined dimension, i.e., to the machined shape indicated by arrow 102 in fig. 2, where the measured point is point B in fig. 2, and the measured value is acceptable, but in practice the profile of the entire seal surface is completely out of design. But if the measurement of the following cylindrical surface is increased then problems with deflection are found.
In the existing patent application, for example, patent application No. 200810015377.9 discloses a method for measuring the taper of a sealing surface of a special threaded sleeve, which is a scheme for measuring the point-like diameter of the sealing surface, two contacts and a dial indicator are connected into a whole by using a connecting rod, and the diameter of a fixed point of the tapered surface is measured, but the scheme cannot detect the shape error of the sealing surface.
For example, patent application No. 201120516876.3 discloses a special threaded joint petroleum pipe coupling sealing surface measuring device, which is also a scheme for measuring the point-like diameter of a sealing surface, wherein a mounting rack is used for connecting a spherical contact and a measuring meter into a whole, and the diameter of a fixed point of a sealing conical surface in the coupling is specially measured, but the scheme cannot detect the shape error of a sealing surface of a pipe body.
For example, patent application No. 201320685121.5 discloses a device for measuring the inner diameter of a sealing surface at the end of a special threaded petroleum pipe end, which adopts a mode of a base with a handle and a sliding groove, is a device for measuring the inner diameter of an end surface sealing and adopts a point-shaped measuring mode, but the scheme cannot detect the shape error of a sealing surface of a pipe body.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a calibrator for detecting the profile error of the sealing surface on the threaded oil sleeve and a calibration method thereof, which can effectively judge whether the lathe loses motion in the process of turning the sealing curved surface of the pipe body to cause a reverse clearance error.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the calibrator for detecting the contour error of the upper sealing surface of the threaded oil casing comprises a base, wherein a pair of measuring arms are arranged on the base, the outer side surfaces of the measuring arms are working surfaces, and the top surfaces of the measuring arms are reference surfaces;
the working surface is provided with a sealing conical surface correcting surface and a cylindrical surface correcting surface adjacent to the sealing conical surface correcting surface.
Preferably, the measuring arm is arranged at the end position of the base.
Preferably, the seal conical surface correction surface is located at the upper end position of the working surface.
Preferably, the cylindrical surface correction surface is located at a position below the sealing conical surface correction surface.
Preferably, the base and the measuring arm are both made of die steel materials.
Preferably, the surface hardness of the working surface is above 50 HRC.
On the other hand, the method for checking the profile error of the sealing surface on the threaded oil casing detects the diameter deviation of the sealing conical surface and the cylindrical surface on the pipe body of the oil casing product by adopting the checking instrument and the contact type diameter measuring gauge, and judges whether the lathe sends the reverse clearance error caused by the loss of motion in the process of turning the sealing curved surface of the pipe body.
Preferably, the calibration method further comprises the following steps:
1) fixing the extending distance of a contact of a first contact type diameter measuring gauge, enabling the first contact type diameter measuring gauge to be close to the datum plane at the position corresponding to the calibration surface of the sealing conical surface, and then rotating the first contact type diameter measuring gauge to zero the reading meter;
2) the first contact type diameter measuring gauge after zero clearing is used to abut against the end face of the oil casing product pipe body, then the first contact type diameter measuring gauge is rotated along the circumferential direction of the oil casing product pipe body, and the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the position of the sealing conical surface on the oil casing product pipe body are recorded;
3) fixing the extending distance of a contact of a second contact type diameter measuring gauge, enabling the second contact type diameter measuring gauge to be close to the datum plane at the position corresponding to the calibration surface of the cylindrical surface, and then rotating the second contact type diameter measuring gauge to zero the reading meter;
4) the second contact type diameter measuring gauge after zero clearing is used to abut against the end face of the oil casing product pipe body, then the second contact type diameter measuring gauge is rotated along the circumferential direction of the oil casing product pipe body, and the maximum deviation value and the minimum deviation value of the actual measurement of the cylindrical surface position on the oil casing product pipe body are recorded;
5) and comparing the measured value of the sealing conical surface with the measured value of the cylindrical surface, if the difference between the sealing conical surface and the cylindrical surface is greater than a set standard, immediately stopping the machine, and determining whether the reverse clearance of the lathe exceeds the standard by adopting the shape of the rubber clay rubbing sealing surface.
The invention provides a calibrator for detecting the contour error of a sealing surface on a threaded oil sleeve and a calibration method thereof. The calibration method provides an adjustment basis for stabilizing the curve shape quality of the sealing surface of the special threaded oil sleeve body after turning, and has wide application prospect in the field of turning of the special threaded oil sleeve body.
Drawings
FIG. 1 is a schematic view of a sealing surface of a tubular body of a conventional oil casing product;
FIG. 2 is a schematic representation of a seal face profile error for the seal face of FIG. 1;
FIG. 3 is a schematic view of the construction of the proof reader of the present invention;
FIG. 4 is a schematic view of the corresponding position of the proof reader of the present invention in use;
FIG. 5 is a schematic diagram of step 1) of the proof reading method of the present invention;
FIG. 6 is a schematic diagram of step 2) of the collation method of the present invention;
FIG. 7 is a schematic diagram of step 3) of the collation method of the present invention;
FIG. 8 is a schematic diagram of step 4) of the collation method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 3, the calibrator for detecting the profile error of the sealing surface on the threaded oil casing provided by the present invention adopts a seat frame form, and includes a base 4, wherein two end portions of the base 4 are respectively provided with a measuring arm 5, outer side surfaces of the measuring arms 5 are working surfaces, and top surfaces of the measuring arms 5 are reference surfaces 501.
The upper end of the working surface is provided with a sealing conical surface correction surface 6 and a cylindrical surface correction surface 7 which is adjacent to and below the sealing conical surface correction surface 6.
The base 4 is a plane placing base and can be stably placed on the desktop of the operating platform.
The sizes and the shapes of the sealing conical surface correction surface 6 and the cylindrical surface correction surface 7 need to be consistent with the design of the sealing conical surface and the cylindrical surface of the measured oil casing product.
The calibration instrument is made of die steel materials, and needs to be subjected to aging treatment to ensure the stability of the final dimension.
The working surface is subjected to heat treatment, the surface hardness is more than 50HRC, and good wear resistance is ensured.
Please refer to fig. 4, the invention further provides a calibration method for detecting the profile error of the sealing surface on the threaded oil sleeve, the calibration method of the invention adopts the calibration instrument and two contact diameter measuring gauges to detect the diameter deviation of the sealing conical surface and the cylindrical surface on the tube body of the oil sleeve product, and judges whether a lathe sends a reverse clearance error caused by lost motion in the process of turning the sealing curved surface of the tube body.
The calibration method further comprises the following steps:
1) using the first contact type diameter measuring gauge 8, enabling a conical fixed contact 10 to be close to a Z1 position 601 corresponding to the sealing cone calibration surface 6, fixing the extending distance of a measuring contact 11 on the first contact type diameter measuring gauge 8, ensuring that the Z1 position 601, corresponding to the sealing cone calibration surface 6, of the measuring contact 11 is close to an XO position 502 of the reference surface 501, then slightly rotating the first contact type diameter measuring gauge 8, and resetting the reading meter 9, as shown in FIG. 5;
2) the first contact type diameter measuring gauge 8 after zero clearing is used to abut against the end face of the oil casing product pipe body 12, then the first contact type diameter measuring gauge 8 is rotated along the circumferential direction of the oil casing product pipe body 12, and the maximum deviation value and the minimum deviation value of the actual measurement of the sealing conical surface position on the oil casing product pipe body 12 are recorded, as shown in fig. 6;
3) using the second contact type diameter measuring gauge 13, enabling a cylindrical fixed contact 14 to abut against a Z2 position 701 of the corresponding cylindrical surface calibration surface 7, fixing the extending distance of a measuring contact 15 on the second contact type diameter measuring gauge 13, ensuring that the Z2 position 701 of the corresponding cylindrical surface calibration surface 7 abuts against an XO position 502 of a reference surface 501, then rotating the second contact type diameter measuring gauge 13, and clearing the reading meter 16, as shown in FIG. 7;
4) the second contact type diameter measuring gauge 13 after zero clearing is used to abut against the end face of the oil casing product pipe body 12, then the second contact type diameter measuring gauge 13 is rotated along the circumferential direction of the oil casing product pipe body 12, and the maximum deviation value and the minimum deviation value of actual measurement of the cylindrical surface position on the oil casing product pipe body 12 are recorded, as shown in fig. 8;
5) comparing the measured values of the sealing conical surface and the cylindrical surface, if the difference between the sealing conical surface and the cylindrical surface is greater than a set standard, stopping immediately, and determining whether the reverse clearance of the lathe exceeds the standard by adopting the shape of the rubber clay rubbing sealing surface.
Examples
Referring to fig. 3 and 4, the special oil tube body thread with the diameter of 88.9mm is machined, a first contact type diameter measuring gauge is used, the extending distance of a contact is fixed to be 0.2mm, zero calibration is carried out at a position 601 at Z1 on the sealing conical surface calibration surface 6, and then the oil tube product is taken to be tested, and the deviation value is read. And then, using a second contact type diameter measuring gauge, fixing the extending distance of a contact of the second contact type diameter measuring gauge to be 3.0mm, performing zero calibration at a Z2 position 701 on the cylindrical surface calibration surface 7, taking the second contact type diameter measuring gauge to an oil pipe product for inspection, and reading a deviation value. When the difference of the deviation value of the two is larger than 0.05mm, the deviation value exceeds the design tolerance range of the product, namely the reverse clearance of the lathe is judged to be possibly too large, the lathe needs to be stopped, and the contour is determined to be abnormal or not by adopting the shape of the plasticine rubbing sealing surface.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a detect sealed face profile error's proofreading appearance on screw thread oil jacket pipe which characterized in that: the measuring device comprises a base, wherein a pair of measuring arms are arranged on the base, the outer side surfaces of the measuring arms are working surfaces, and the top surfaces of the measuring arms are reference surfaces;
the working surface is provided with a sealing conical surface correcting surface and a cylindrical surface correcting surface adjacent to the sealing conical surface correcting surface.
2. The calibrator for detecting errors in the profile of a sealing surface on a threaded oil bushing according to claim 1, wherein: the measuring arm is arranged at the end part of the base.
3. The calibrator for detecting errors in the profile of a sealing surface on a threaded oil bushing according to claim 1, wherein: the sealing conical surface correction surface is positioned at the upper end of the working surface.
4. A calibrator for detecting errors in the profile of a sealing surface on a threaded oil sleeve according to claim 3, wherein: the cylindrical surface correction surface is positioned below the sealing conical surface correction surface.
5. The calibrator for detecting errors in the profile of a sealing surface on a threaded oil bushing according to claim 1, wherein: the base with the measuring arm all adopts mould steel material to make.
6. The calibrator for detecting errors in the profile of a sealing surface on a threaded oil bushing according to claim 1, wherein: the surface hardness of the working surface is above 50 HRC.
7. A checking method for detecting contour errors of a sealing surface on a threaded oil sleeve is characterized by comprising the following steps: the calibration method comprises the steps of detecting the diameter deviation of a sealing conical surface and a cylindrical surface on a pipe body of an oil casing product by using the calibration instrument and the contact type diameter measuring gauge as claimed in any one of claims 1 to 6, and judging whether a lathe sends a reverse clearance error caused by loss of motion in the process of turning the sealing curved surface of the pipe body.
8. A method of calibrating a profile error of a sealing surface on a threaded oil bushing according to claim 7, wherein the method further comprises the steps of:
1) fixing the extending distance of a contact of a first contact type diameter measuring gauge, enabling the first contact type diameter measuring gauge to be close to the datum plane at the position corresponding to the calibration surface of the sealing conical surface, and then rotating the first contact type diameter measuring gauge to zero the reading meter;
2) the first contact type diameter measuring gauge after zero clearing is used to abut against the end face of the oil casing product pipe body, then the first contact type diameter measuring gauge is rotated along the circumferential direction of the oil casing product pipe body, and the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the position of the sealing conical surface on the oil casing product pipe body are recorded;
3) fixing the extending distance of a contact of a second contact type diameter measuring gauge, enabling the second contact type diameter measuring gauge to be close to the datum plane at the position corresponding to the calibration surface of the cylindrical surface, and then rotating the second contact type diameter measuring gauge to zero the reading meter;
4) the second contact type diameter measuring gauge after zero clearing is used to abut against the end face of the oil casing product pipe body, then the second contact type diameter measuring gauge is rotated along the circumferential direction of the oil casing product pipe body, and the maximum deviation value and the minimum deviation value of the actual measurement of the cylindrical surface position on the oil casing product pipe body are recorded;
5) and comparing the measured value of the sealing conical surface with the measured value of the cylindrical surface, if the difference between the sealing conical surface and the cylindrical surface is greater than a set standard, immediately stopping the machine, and determining whether the reverse clearance of the lathe exceeds the standard by adopting the shape of the rubber clay rubbing sealing surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011046227.1A CN114322716B (en) | 2020-09-29 | 2020-09-29 | Calibrating instrument for detecting contour error of upper sealing surface of threaded oil sleeve and calibrating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011046227.1A CN114322716B (en) | 2020-09-29 | 2020-09-29 | Calibrating instrument for detecting contour error of upper sealing surface of threaded oil sleeve and calibrating method thereof |
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| CN114322716A true CN114322716A (en) | 2022-04-12 |
| CN114322716B CN114322716B (en) | 2023-11-14 |
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