Sensing device for riser pressure detection

Abstract

The utility model provides a sensing device for detecting the pressure of a vertical pipe, the sensing device is used for being sleeved outside the vertical pipe, and the sensing device comprises a strain measuring rod which is used for being tightly attached to the outer surface of the vertical pipe so as to monitor the pressure change in the vertical pipe; the locking connection assembly is connected to the two ends of the strain measurement rod, and the locking connection assembly is configured to be capable of surrounding and being locked on the vertical pipe when the locking connection assembly is installed on the vertical pipe. The beneficial effects of the utility model are that the strain measuring rod is tightly attached to the vertical pipe through the locking connection assembly, and the pressure data in the vertical pipe can be detected in a non-direct contact mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas development technical field, in particular to a kind of sensing device for standpipe pressure detection. BACKGROUND

[0002] In directional construction process, downhole equipment is often used to transmit mud fluctuation data to the ground, and generally needs to install a pressure sensor on the mud standpipe to detect mud fluctuation data.

[0003] In the traditional standpipe pressure test, a standpipe pressure sensor with a three-way flange is usually used. This sensor directly contacts with the mud in the standpipe, and the measurement accuracy may be affected by the mud and other media. Moreover, there is a significant safety risk. Specifically, the flow of mud in the wellbore may generate turbulence and vortex phenomena, resulting in irregular pressure changes on the sensor, and the friction and wear of the sensor when it contacts with the mud may generate additional vibration and noise, resulting in a large bottom noise of the sensor signal and affecting the accuracy of the sensor. When the mud shock is large, the sensor is easily damaged, and frequent disassembly and installation are required, which has a high maintenance cost. Moreover, when the thread is damaged or the pressure is too large, the pressure sensor may be ejected during installation, disassembly and use, which may cause accidents.

[0004] For example, the Chinese utility model patent with publication number CN210289755U discloses a switching sea blue pressure sensor device, which includes a standpipe, a pipe body, an upper connecting pipe and a standpipe pressure gauge. The upper connecting pipe is coaxially fixed and installed at the upper end of the pipe body, and the inner diameter of the upper connecting pipe is smaller than that of the pipe body. The standpipe pressure gauge is fixedly installed at the upper end of the upper connecting pipe. The standpipe is fixedly installed at the lower end of the pipe body. A radial mounting hole is provided on the pipe body, and a sea blue pressure sensor is fixedly installed in the radial mounting hole. The sensor of the utility model is easily detached under the action of external force under high pressure, and the splashed high-pressure drilling fluid column flow forms a potential safety hazard to the drilling platform operators and equipment.

[0005] Therefore, it is necessary to study a sensing device for standpipe pressure detection to solve the above problems or alleviate the impact of the above problems. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of sensing device for standpipe pressure detection, and strain measuring rod is tightly attached on standpipe by locking connection assembly, and the pressure data in standpipe is detected by not directly contacting mode, to effectively solve the above problems or alleviate the impact of the above problems.

[0007] The sensing device for standpipe pressure detection of the utility model is used to be sleeved outside the standpipe, and the sensing device comprises:

[0008] A strain measuring rod is used to adhere to the outer surface of the riser to monitor the pressure change in the riser;

[0009] A locking connection assembly is connected at both ends of the strain measuring rod, and the locking connection assembly is configured to be able to surround and lock on the riser when it is installed on the riser.

[0010] In one embodiment, the side of the strain measuring rod facing the riser is pasted with a strain gauge, which is configured to follow the corresponding deformation of the riser when it is in close contact with the riser.

[0011] In one embodiment, the locking connection assembly includes a locking member and a connecting belt, one end of the connecting belt is connected with the strain measuring rod, and the other end of the connecting belt is fastened by the locking member to enable the connecting belt and the strain measuring rod to surround the riser.

[0012] In one embodiment, the locking connection assembly includes two connecting belts, which are symmetrically distributed at both ends of the strain measuring rod, and the end of the connecting belt away from the strain measuring rod is provided with a locking hole, which is connected with the locking member.

[0013] In one embodiment, the connecting belt is a torsion chain, and the locking member is a torsion screw.

[0014] In one embodiment, the sensing device further includes a connecting seat, which covers the side of the strain measuring rod away from the riser, and both ends of the connecting seat are connected with the locking connection assembly.

[0015] In one embodiment, the side of the connecting seat facing the riser is provided with an I-shaped groove, the strain measuring rod is arranged in the middle of the I-shaped groove, and both ends of the strain measuring rod are connected with the locking connection assembly and the connecting seat through connecting members.

[0016] In one embodiment, the connecting seat is provided with a micro-motion clamping groove with a length direction along the deformation direction of the strain measuring rod, the connecting member is connected in the micro-motion clamping groove, and the connecting member can move correspondingly with the deformation of the strain measuring rod.

[0017] In one embodiment, the sensing device further includes a circuit cavity, which is arranged on the side of the connecting seat away from the riser, and the circuit cavity is used to process the signal monitored by the strain measuring rod.

[0018] In one embodiment, the circuit cavity is internally provided with a signal conditioning circuit, and the signal conditioning circuit comprises a signal amplification circuit, a signal filtering circuit, a signal shaping circuit and a compatible output interface circuit connected in sequence.

[0019] Compared with the prior art, the sensing device for stand pipe pressure detection has at least the following beneficial effects:

[0020] The sensing device for stand pipe pressure detection of the utility model tightly sticks strain measuring rod on stand pipe through locking connection assembly, strain measuring rod can change shape with pressure change of mud in stand pipe, to monitor pressure change of mud in stand pipe, to realize detection of pressure data in stand pipe through non-direct contact mode. This can replace traditional sensor and mud medium direct contact detection mode, can improve detection accuracy, and can reduce safety risk. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be described in more detail in the following based on the embodiment and with reference to the drawings.

[0022] Figure 1 It is a structural schematic diagram of the sensing device of the utility model embodiment;

[0023] Figure 2 It is a structural schematic diagram of the sensing device of the utility model embodiment installed on stand pipe;

[0024] Figure 3 It is a structural schematic diagram of the sensing device of the utility model embodiment installed on stand pipe from another perspective;

[0025] Figure 4 It is a structural schematic diagram of the connecting seat of the utility model embodiment towards one side of stand pipe.

[0026] In the drawings, the same parts use the same reference signs. The drawings are not drawn according to the actual scale.

[0027] Reference signs:

[0028] 1-strain measuring rod, 2-locking connection assembly, 3-stand pipe, 4-locking piece, 5-connection belt, 6-locking hole, 7-connection piece, 8-connection plate, 9-connecting seat, 10-I-shaped groove, 11-micro-motion clamping groove, 12-circuit cavity. DETAILED DESCRIPTION

[0029] The utility model will be described in more detail in the following based on the embodiment and with reference to the drawings.

[0030] As Figure 1 And Figure 2The utility model discloses a sensing device for standpipe pressure detection is used for setting in the outer of standpipe 3, and sensing device can include:

[0031] Strain measuring rod 1, strain measuring rod 1 is used to be close to the outer surface of standpipe 3 to monitor the pressure change in standpipe 3;

[0032] Locking connection assembly 2, locking connection assembly 2 is connected at the both ends of strain measuring rod 1, and locking connection assembly 2 is configured to when it is installed on standpipe 3, can be locked on standpipe 3 around.

[0033] Specifically, sensing device is connected with strain measuring rod 1 through locking connection assembly 2, can detachably set on standpipe 3 to facilitate installation, maintenance.Sensing device is installed on standpipe 3, through the locking effect of locking connection assembly 2, can make strain measuring rod 1 keep close to the outer surface of standpipe 3.This way, when the pressure change of mud in standpipe 3 forms impact to the pipe wall and makes the pipe wall slightly deform, strain measuring rod 1 can follow standpipe 3 and correspondingly deform, then strain measuring rod 1 reflects the pressure change of mud in standpipe 3 according to the deformation condition of itself, to realize the non-contact standpipe 3 pressure detection.

[0034] This way, sensing device can replace the detection mode that traditional sensor is directly contacted with medium such as mud, can improve the accuracy of detection, and can reduce the security risk simultaneously.

[0035] In an example, the side of strain measuring rod 1 towards standpipe 3 is pasted with strain gauge (not shown in the drawing), and the strain gauge is configured to when it is close to standpipe 3, can follow standpipe 3 and correspondingly deform.

[0036] Specifically, strain gauge can be pasted on the surface of strain measuring rod 1 through the connecting mode of glue solidification, and is used to be close to the outer wall of standpipe 3.When the pressure of mud in standpipe 3 changes, will cause standpipe 3 to slightly deform, and this slight deformation causes the corresponding tensile or shrinkage deformation of strain gauge close to it.The deformation of strain gauge causes the change of its resistance value, and then converts into voltage signal change, so that the slight change of mud pressure can be sensitively detected.

[0037] It should be noted that the change of strain gauge resistance value can usually be measured through Wheatstone bridge circuit, and the unbalance of bridge can produce a voltage signal proportional to pressure, and this circuit configuration can improve the sensitivity and linearity of measurement.BF350-3EB type strain gauge can be pasted on strain measuring rod 1.

[0038] In an example, as Figures 1 to 4As shown, the locking connection assembly 2 comprises a locking piece 4 and a connection band 5, one end of the connection band 5 is connected with the strain measuring rod 1, and the other end of the connection band 5 is fastened and connected through the locking piece 4, so that the connection band 5 and the strain measuring rod 1 can be cooperatively wrapped around the riser 3.

[0039] Specifically, the strain measuring rod 1 is fastened and connected through the locking piece 4 and the connection band 5, and is bound on the riser 3 in a winding manner, so that the change of the pressure of the riser 3 is fully concentrated to the strain gauge, and the deformation amount of the strain gauge is equivalent to being amplified. In this way, compared with directly fixing and sticking the strain gauge on the surface of the riser 3 to measure the deformation of only one point of the riser 3, the deformation measurement range of the sensing device becomes the whole circumference of the riser 3, and the sensitivity of the sensing device for measuring the pressure change is higher. Moreover, the sensing device can prevent the strain measuring rod 1 from being twisted along the axial direction of the riser through the fastening of the locking piece 4.

[0040] Further, the connection band 5 has an arc structure matched with the riser 3, or the connection band 5 can be bent into an arc structure.

[0041] It should be noted that Figure 2 In order to better show the structure of the connection band 5, the connection band 5 does not completely wrap around the riser 3, and in actual application, the connection band 5 is completely wrapped around the riser 3 after being connected through the locking piece 4.

[0042] In one example, the locking connection assembly 2 comprises two connection bands 5, the two connection bands 5 are symmetrically distributed at two ends of the strain measuring rod 1, and one end of the connection band 5 away from the strain measuring rod 1 is provided with a locking hole 6, and the locking hole 6 is connected with the locking piece 4.

[0043] Specifically, the first ends of the two connection bands 5 are connected with the strain measuring rod 1 through a connecting piece 7, the second ends of the two connection bands 5 are each provided with a matching locking hole 6, and the locking holes 6 of the two connection bands 5 are connected through the locking piece 4 to realize the fastening connection of the two connection bands 5. It should be noted that one end of the connection band 5 away from the strain measuring rod 1 is provided with a connecting plate 8, and the locking hole 6 is formed on the connecting plate 8.

[0044] Further, the connection band 5 is a torsion chain, and the locking piece 4 is a torsion screw. During connection, a torsion wrench is used to tighten the torsion screw with appropriate torque.

[0045] In one example, the sensing device further comprises a connecting seat 9, the connecting seat 9 covers one side of the strain measuring rod 1 away from the riser 3, and both ends of the connecting seat 9 are connected with the locking connection assembly 2. The connecting seat 9 has a certain protection effect on the strain measuring rod 1.

[0046] In one example, as Figure 1 , Figure 2 and Figure 4As shown, the side of the connecting seat 9 facing the riser 3 is provided with a I-shaped groove 10, and the strain measuring rod 1 is arranged in the middle of the I-shaped groove 10, and both ends of the strain measuring rod 1 are connected with the locking connecting assembly 2 and the connecting seat 9 through the connecting pieces 7.

[0047] Specifically, the I-shaped groove 10 of the connecting seat 9 provides installation space for the connection between the strain measuring rod 1 and the connecting belt 5. The strain measuring rod 1 is matched and installed in the middle of the I-shaped groove 10, and both ends of the strain measuring rod 1 are connected with the connecting belt 5 and the connecting seat 9 through the connecting pieces 7. It should be noted that the side wall of the I-shaped groove 10 of the connecting seat 9 is provided with four connecting holes (not shown in the figure) matched with the connecting pieces 7, and the four connecting holes are correspondingly formed into two groups, and one group of connecting holes is used to match and install one connecting piece 7 passing through the strain measuring rod 1 and the connecting belt 5.

[0048] Further, as shown in Figure 1 and Figure 2 , the connecting seat 9 is provided with a micro-motion clamping groove 11 with a length direction along the deformation direction of the strain measuring rod 1, and the connecting piece 7 is matched and connected in the micro-motion clamping groove 11, and the connecting piece 7 can move correspondingly with the deformation of the strain measuring rod 1.

[0049] Specifically, the micro-motion clamping groove 11 is part of the connecting hole on the connecting seat 9 for installing the connecting piece 7. It should be noted that one group of connecting holes on the connecting seat 9 can limit the position of the connecting piece 7, and the other group is the micro-motion clamping groove 11, which can ensure the stability of the connection between the connecting seat 9 and the strain measuring rod 1 and the connecting belt 5, ensure that the installation position of the connecting seat 9 does not change, and at the same time allow the strain measuring rod 1 to deform circumferentially along the riser 3 to realize the measurement work.

[0050] It should also be noted that the design of the connecting seat 9 can further prevent the strain measuring rod 1 from twisting axially along the riser 3, and can guide the deformation of the strain measuring rod 1 circumferentially along the riser 3.

[0051] In one example, as shown in Figures 1 to 3 , the sensing device further comprises a circuit cavity 12 arranged on the side of the connecting seat 9 away from the riser 3, and the circuit cavity 12 is used for processing the signals monitored by the strain measuring rod 1.

[0052] Further, the circuit cavity 12 is built-in signal conditioning circuit (not shown in the figure), and the signal conditioning circuit comprises signal amplification circuit, signal filtering circuit, signal shaping circuit and compatible output interface circuit connected in sequence.

[0053] Specifically, since the output signal of the strain gauge is weak, it is necessary to amplify and filter through a signal conditioning circuit to ensure the stability and reliability of the signal. The circuit cavity 12 is filled with gel for protecting the signal conditioning circuit. The signal conditioning circuit can include a signal amplification circuit, a signal filtering circuit, a signal shaping circuit and a compatible output interface circuit connected in sequence, the signal amplification circuit is used for amplifying the collected signal, the signal filtering circuit is used for filtering out noise, the signal shaping circuit is used for converting the signal into a standard form output, and the compatible output interface circuit is used for stable signal output.

[0054] In summary, the beneficial effects of the present application compared with the prior art include at least:

[0055] The sensing device of the present application adopts a non-contact design, which can avoid direct contact with mud and other media, reduce safety risks and improve safety. The sensing device of the present application uses a high-precision full-bridge strain gauge for detection, which has high precision, high sensitivity, temperature self-compensation, excellent linear characteristics, high stability, fast response, long service life, ease of use and wide applicability. The sensitivity is 3-5 times higher than that of the conventional detection scheme, which can improve the safety and accuracy of measurement. The sensing device of the present application does not directly contact with mud, which can prevent the sensor from being damaged when the mud shock is large, prolong the service life of the device, reduce the disassembly and installation frequency, and reduce the maintenance cost. The sensing device of the present application is convenient to disassemble and assemble through the locking connection assembly.

[0056] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sensing device for riser pressure detection, characterized by, The sensing device is used to be sleeved outside the riser, and comprises: a strain measuring rod used to be attached to the outer surface of the riser to monitor the pressure change in the riser, one side of the strain measuring rod facing the riser being attached with strain gauges configured to deform correspondingly when the strain gauges are attached to the riser; a locking connection assembly connected at both ends of the strain measuring rod and configured to be wrapped around and locked on the riser when the locking connection assembly is installed on the riser.

2. A sensing device for riser pressure detection according to claim 1, characterized in that, The locking connection assembly comprises a locking member and a connecting band, one end of the connecting band being connected with the strain measuring rod, and the other end of the connecting band being fastened by the locking member so that the connecting band and the strain measuring rod can be wrapped around the riser.

3. A sensing device for riser pressure detection according to claim 2, wherein, The locking connection assembly comprises two connecting bands symmetrically distributed at both ends of the strain measuring rod, and one end of each of the connecting bands being provided with a locking hole, the locking hole being connected with the locking member.

4. A sensor device for riser pressure detection according to claim 2, characterized in that, The connecting band is a torsion chain, and the locking member is a torsion screw.

5. A sensor device for riser pressure detection according to any of claims 1 to 4, characterized in that, The sensing device further comprises a connecting seat covering one side of the strain measuring rod away from the riser, and both ends of the connecting seat being connected with the locking connection assembly.

6. A sensing device for riser pressure detection according to claim 5, wherein, One side of the connecting seat facing the riser is provided with an I-shaped groove, the strain measuring rod being arranged in the middle of the I-shaped groove, and both ends of the strain measuring rod being connected with the locking connection assembly and the connecting seat through connecting members.

7. A sensing device for riser pressure detection according to claim 6, wherein, The connecting seat is provided with a micro-motion clamping groove with a length direction along the deformation direction of the strain measuring rod, the connecting members being connected in the micro-motion clamping groove, and the connecting members being capable of moving correspondingly with the strain measuring rod.

8. A sensor device for riser pressure detection according to claim 5, characterized in that, The sensing device further comprises a circuit cavity arranged on one side of the connecting seat away from the riser, the circuit cavity being used to process signals monitored by the strain measuring rod.

9. A sensing device for riser pressure detection according to claim 8, wherein, The circuit cavity is internally provided with a signal conditioning circuit, the signal conditioning circuit comprising a signal amplification circuit, a signal filtering circuit, a signal shaping circuit and a compatible output interface circuit connected in sequence.

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