Auxiliary device for measuring full-length straightness of oil casing

Abstract

The utility model discloses an auxiliary device for measuring the full-length straightness of an oil casing, which comprises two fixed bases, the two fixed bases are respectively arranged at the two ends of the oil casing, a plurality of fastening bolts are fixedly connected to the peripheral surfaces of the two fixed bases, and each fastening bolt is in threaded connection with a fastening nut. One end of each fixing base is fixedly connected with a plurality of fixing bolts, each fixing bolt is in threaded connection with a fixing nut, when the oil casing is measured, each fastening nut is matched with the inner circumferential surface of the oil casing in an abutting mode, and each fixing nut is matched with the outer circumferential surface of the oil casing in an abutting mode. The oil casing straightness measuring device has the advantages that the oil casing straightness measuring error is reduced, and the oil casing straightness measuring accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the oil casing full length straightness measurement technical field, concretely is a kind of auxiliary device of measuring oil casing full length straightness. BACKGROUND

[0002] Oil casing for oil field is the basic material of petroleum industry, is indispensable special pipe material for petroleum exploration and development, and is also the strategic bulk material of petroleum industry, and its quality and performance concern the comprehensive economic benefit and safety benefit of petroleum industry.Oil pipe occupies very important position in petroleum industry: casing is mainly used to support well wall during drilling process and after well completion, to ensure the drilling process and the normal operation of the entire oil well after well;oil pipe mainly transports oil and gas at the bottom of oil well to ground;the full length straightness of oil casing is an important quality index, which directly affects the use effect and safety of oil casing.According to relevant standards, the full length straightness of oil pipe and casing is not more than 0.2% of total length, and the internal control standard of our company is not more than 0.08% of total length.This requirement aims to ensure the straightness of oil casing, so as to avoid unnecessary friction and loss in use, ensure the smoothness of oil flow, and improve the service life and efficiency of oil casing.In order to achieve this standard, advanced production technology and strict quality control measures are needed to ensure that oil casing maintains high straightness during production.

[0003] The straightness of existing oil casing is generally measured by three people, two measuring personnel at both ends of oil casing pull the taut rope, and the remaining operator inserts the plug gauge to measure the straightness of oil casing.

[0004] For the related technology in the above, the straightness of existing oil casing is more troublesome, and two measuring personnel are used to pull the taut rope to measure the straightness of oil casing, which is easy to cause great influence on the measurement result due to the operation level of measuring personnel, and thus the measurement result is easy to have error. UTILITY MODEL CONTENTS

[0005] In order to reduce the measurement error of oil casing straightness and improve the accuracy of oil casing straightness measurement, the purpose of the utility model is to provide an auxiliary device for measuring the full length straightness of oil casing.

[0006] In order to realize the above object, the utility model provides the following technical scheme: an auxiliary device for measuring the full length straightness of an oil casing, comprising two fixed bases, the two fixed bases are arranged at the two ends of the oil casing, the outer circumferential surface of the two fixed bases is fixedly connected with a plurality of fastening bolts, the fastening bolts are all threadedly connected with fastening nuts, one end of the two fixed bases is fixedly connected with a plurality of fixed bolts, the fixed bolts are all threadedly connected with fixed nuts, when the oil casing is measured, the fastening nuts are all in abutting cooperation with the inner circumferential surface of the oil casing, and the fixed nuts are all in abutting cooperation with the outer circumferential surface of the oil casing.

[0007] Preferably, the fastening bolts are uniformly distributed around the fixed base axis, and the fastening bolts are all provided with abutting curved surfaces away from one end of the fixed base, so that the fastening bolts are in stable abutting cooperation with the inner circumferential surface of the oil casing.

[0008] Preferably, the number of the fixed bolts comprises four, the fixed bolts are uniformly distributed around the fixed base axis and form a cross structure, so as to facilitate the measurement of the axial direction of the oil casing.

[0009] Preferably, the fixed base end face is fixedly provided with a level, so as to facilitate the two fixed bases to be located at the same horizontal position.

[0010] Compared with the prior art, the auxiliary device for measuring the full length straightness of the oil casing has the advantages that originally, three people operate, two people stand at the two ends of the oil casing to pull the tight rope, and one person inserts the plug gauge; now, the auxiliary device is used to fasten the tight rope at the two ends of the oil casing, and one person can complete the operation, thereby ensuring the stability and reliability of the measurement. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 Structure diagram of the utility model Figure One ;

[0012] Figure 2 Structure diagram of the utility model after the fastening bolt and the fastening nut are tightened Figure Two ;

[0013] Figure 3 Structure diagram of the utility model after the fixed bolt and the fixed nut are tightened Figure Three ;

[0014] In the drawing: 1, fixed base; 2, fastening bolt; 3, fastening nut; 4, fixed bolt; 5, fixed nut; 6, level; 7, oil casing. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range protected by the utility model.

[0016] Please refer to Figures 1-3 The utility model provides an embodiment: a kind of auxiliary device for measuring the full length straightness of oil casing includes two fixed base 1, oil casing 7 is measured straightness, two fixed base 1 is respectively arranged at the both ends of oil casing 7, and fixed base 1 is cylindrical.

[0017] Three fastening bolts 2 are fixedly connected to the outer circumferential surface of fixed base 1, each fastening bolt 2 is evenly distributed around the axis of fixed base 1, each fastening bolt 2 is threadedly connected with fastening nut 3, and each fastening nut 3 is in abutting engagement with the inner circumferential surface of oil casing 7 when oil casing 7 is measured straightness, and each fastening nut 3 is provided with an abutting arc surface away from one end of fixed base 1, so that the abutting engagement between each fastening nut 3 and the inner circumferential surface of oil casing 7 is more stable.

[0018] Four fixed bolts 4 are fixedly connected to one end of fixed base 1, and each fixed bolt 4 is evenly distributed around the axis of fixed base 1, so that each fixed bolt 4 forms a cross structure, and the straightness of oil casing 7 in four perpendicular radial directions can be measured when the straightness of oil casing 7 is measured by winding the fixed bolts 4 with the taut ropes, so that the measurement result is more accurate.

[0019] Each fixed bolt 4 is threadedly connected with fixed nut 5, and each fixed nut 5 is in abutting engagement with the outer circumferential surface of oil casing 7 on the side close to fixed base 1 when oil casing 7 is measured, so that each fixed nut 5 cooperates with each fastening bolt 2 to clamp and fix oil casing 7, so that the position of oil casing 7 is more stable during measurement.

[0020] A level 6 is fixedly arranged at one end of fixed base 1 close to fixed bolt 4, so that the both ends of oil casing 7 are at the same horizontal position when the straightness of oil casing 7 is measured, so that the measurement of oil casing 7 is more accurate.

[0021] In use, the embodiment of the present application first measures personnel will need to be straightness measurement of casing 7 both ends fixed to the test device, installation needs to be so that both levels 6 reach the horizontal position, so that the casing 7 both ends horizontal, then tighten each fixed nut 5, so that the fixed nut 5 and the outer peripheral surface of the casing 7 abutting fixed, then tighten each fastening nut 3, so that each fastening nut 3 with the inner peripheral surface of the casing 7 abutting cooperation, so as to complete the casing 7 holding fixed, then the two ends of the taut rope are wound respectively fixed to the two fixed base 1 opposite two fixed bolts 4, and make the taut rope close to the casing 7 outer wall, then use the caliper to measure the distance between the taut rope and the casing 7 outer wall, then constantly replace the fixed bolt 4 wound with the taut rope, repeat the above steps to complete the measurement of the straightness of the casing 7 four radial direction, improve the existing casing straightness measurement is more troublesome, and using two measurement personnel to tighten the taut rope, so as to measure the straightness of the casing, easy to be measured by the operator standard, and then the measurement results cause greater influence, and then lead to the measurement results prone to error.

[0022] It will be apparent to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Thus, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the above description, and it is intended to be encompassed within the present application all changes which come within the meaning and range of equivalency of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

Claims

1. An auxiliary device for measuring the straightness of a full length of a casing (7), characterized in that: The utility model relates to a kind of oil jacket pipe measuring device, including two fixed bases (1), two the fixed base (1) is respectively arranged in oil jacket pipe (7) both ends, the outer peripheral surface of two the fixed base (1) is fixedly connected with several fastening bolts (2), each the fastening bolt (2) is threadedly connected with fastening nut (3), two the fixed base (1) one end is fixedly connected with several fixed bolt (4), each the fixed bolt (4) is threadedly connected with fixed nut (5), oil jacket pipe (7) is measured, each the fastening nut (3) is with the inner peripheral surface of oil jacket pipe (7) abutting cooperation, each the fixed nut (5) is with the outer peripheral surface of oil jacket pipe (7) abutting cooperation.

2. An auxiliary device for measuring the straightness of a full length of a casing or tubing string (7) according to claim 1, characterized in that: Each the fastening bolt (2) is evenly distributed around the axis of fixed base (1), and the end of each the fastening bolt (2) away from the fixed base (1) is provided with an abutting arc surface, so that each the fastening bolt (2) abuts stably with the inner peripheral surface of oil jacket pipe (7).

3. An auxiliary device for measuring the straightness of a full length of a casing or tubing string (7) according to claim 1, characterized in that: The number of the fixed bolt (4) includes four, each the fixed bolt (4) is evenly distributed around the axis of fixed base (1) and forms a cross structure, so as to measure each axial direction of oil jacket pipe (7).

4. An auxiliary device for measuring the straightness of a full length of a casing or tubing string (7) according to claim 1, characterized in that: The fixed base (1) is fixedly provided with a level (6) on the end face, so that the two fixed bases (1) are located at the same horizontal position.

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