Photoelectric integrated pressure gauge dragging cylinder

Abstract

A photoelectric integrated pressure gauge dragging cylinder comprises a main tool body and a dragging cylinder, the dragging cylinder is arranged outside the normal working drift diameter of the main tool body, a pressure gauge and a cable which is connected with the pressure gauge and extends out of a well are arranged in the dragging cylinder, and an optical fiber which extends out of the well is further embedded in the main tool body. The dragging cylinder is arranged on the connecting cylinder of the main tool body, so that the problem that an existing built-in pressure gauge dragging cylinder affects underground operation of the main tool body is solved, the defect that an externally-hung dragging cylinder is prone to being separated from the main tool body is overcome, and underground real-time and long-time data acquisition is achieved; compared with an existing mode of collecting data for multiple times, the method has the advantages of being reliable in sealing, simple in process, convenient to operate, high in reliability, short in consumed time, high in efficiency, low in cost and the like. The optical fiber can monitor underground pressure, temperature, sound and the like in real time, and data can be effectively monitored on the ground in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring data such as pressure in oil drilling, and in particular relates to a photoelectric integrated pressure gauge drag tube. Background Art

[0002] The pressure gauges used in oil drilling are usually used to detect pressure changes during the drilling process. They can monitor the pressure of the drilling fluid (mud) in real time, thereby helping engineers determine important information such as formation pressure, drilling fluid circulation conditions, and well control safety. This information is essential to ensure the safety and efficiency of drilling operations. Due to the complex downhole environment, a drag tube loaded with a pressure gauge is usually provided to effectively protect the pressure gauge, which can overcome the interference of the downhole environment on the pressure gauge measurement.

[0003] At present, the pressure gauge drag barrel used in oil well operations generally installs the pressure gauge in the pressure gauge drag barrel, and the drag barrel is loaded into the tool bore and lowered synchronously. Loading into the tool bore will affect the operation of the tool bore, and large bore operations cannot be achieved, and operations in the pipe string cannot pass through, etc. If an external drag barrel is set, the reliability of the external drag barrel will be affected because the tool will be subjected to external forces when it is lowered into the well (such as damage to the electronic pressure gauge during the fracturing process), causing the drag barrel to separate from the tool body and fall off, affecting the smooth progress of the downhole operation.

[0004] At present, built-in and external pressure gauges usually have their own batteries. The data collection time during underground operations is measured by the power of the built-in batteries. The accuracy of the data is determined by averaging the data collected by going down the well multiple times. The pressure gauge cannot continuously detect and monitor in real time, and there is no monitoring of temperature and sound. It is time-consuming, inefficient and costly. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a photoelectric integrated pressure gauge drag, which solves the problem that the current built-in pressure gauge drag affects the downhole operation of the main tool body, and at the same time solves the disadvantage that the external drag is easy to separate from the main tool body, thereby realizing real-time and long-term data collection downhole. At the same time, the optical fiber provided can also monitor the downhole pressure, temperature, sound and other functions in real time, and can effectively monitor the real-time data on the ground.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A photoelectric integrated pressure gauge drag barrel comprises a main tool body and a drag barrel, wherein the drag barrel is arranged outside the normal working path of the main tool body, a pressure gauge and a cable connected to the pressure gauge and extending outside the well are arranged in the drag barrel, and an optical fiber extending outside the well is also embedded in the main tool body.

[0008] Preferably, the main tool body includes an upper joint, a connecting tube and a lower joint which are connected in sequence, a protrusion is provided on the outer wall of the connecting tube protruding outward, a blind hole is provided on the protrusion to constitute the inner cavity of the drag tube and to place the pressure gauge, and a plurality of pressure transmission holes connecting the blind hole and the through diameter of the connecting tube are provided between the two.

[0009] Preferably, shock-absorbing springs are provided at both upper and lower ends of the pressure gauge, and a locking mechanism fixed to the inner wall of the blind hole and locked with the cable is provided at the top of the shock-absorbing spring at the upper end.

[0010] Preferably, the locking mechanism includes a sealing joint through which the cable is passed and connected to the inner wall of the blind hole, a locking sleeve which can be deformed by external force and pressed against the outer wall of the cable is embedded in a cone in the outer port of the sealing joint, and a clamping sleeve which drives the locking sleeve to deform is inserted into the outer end of the sealing joint.

[0011] Preferably, a groove for embedding the optical fiber is formed on the side wall of the raised portion, and a pressing plate for limiting the optical fiber in the groove is mounted on the side wall of the raised portion.

[0012] Preferably, the pressing plate is connected to the side wall of the raised portion by bolts.

[0013] Preferably, the outer surface of the pressing plate is flush with the surface of the side wall of the raised portion, the hole for connecting the bolt on the pressing plate is a countersunk hole, and the bolt is a countersunk bolt.

[0014] Preferably, an O-type elastic sealing ring is crimped between the sealing joint and the inner wall of the blind hole.

[0015] Beneficial effects of the utility model

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The utility model of the drag barrel is arranged on the connecting barrel of the main tool body, which solves the problem that the current built-in pressure gauge drag barrel affects the downhole operation of the main tool body, and solves the disadvantage that the external drag barrel is easy to separate from the main tool body, so as to realize the real-time and long-term data collection of the downhole. Compared with the current method of collecting data by multiple times, it has the advantages of reliable sealing, simple process, convenient operation, high reliability, short time consumption, high efficiency and low cost. The optical fiber arranged with it can also monitor the downhole pressure, temperature, sound and other functions in real time, and can effectively monitor the real-time data on the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a 1 / 4 cross-sectional view of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the utility model;

[0020] Figure 3 for Figure 1 Sectional view at section AA;

[0021] Figure 4 for Figure 1 Cross-sectional view at section BB. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-4 The utility model provides a technical solution: a photoelectric integrated pressure gauge drag barrel, wherein the drag barrel 2 is arranged outside the normal working path of the main tool body (the main tool body includes an upper joint 8, a connecting barrel 1 and a lower joint 15 connected in sequence), effectively solving the problem that the current built-in drag barrel affects the construction and production in the pipe column, reducing the operating cost and ensuring the normal operation of the main tool body.

[0026] In order to solve the problem that the current pressure gauge is equipped with a battery and cannot achieve real-time and long-term measurement, the utility model is provided with a pressure gauge 3 and a cable 6 connected to the pressure gauge 3 and extending to the outside of the well in the drag tube 2, and an optical fiber 12 extending to the outside of the well is also embedded in the main tool body. The cable 6 extending out of the well can realize continuous power supply to the pressure gauge 3, ensure continuous measurement and collection of the pressure gauge 3, and transmit the diameter pressure measured by the pressure gauge 3 to the outside of the well; at the same time, the optical fiber 12 extending out of the well monitors the downhole pressure, temperature, sound and other parameters in real time, and transmits them to the outside of the well in real time, realizing real-time and long-term measurement and detection of downhole pressure and other parameters, improving the continuous operation time of the downhole, and reducing the operation cost. Specifically, optical fiber temperature sensors and optical fiber acoustic wave sensors can be used to realize the optical fiber 12 to monitor the downhole pressure, temperature, sound and other parameters in real time.

[0027] Specifically, the main tool body includes an upper joint 8, a connecting tube 1 and a lower joint 15 connected in sequence. A protrusion 16 is provided on the outer wall of the connecting tube 1. A blind hole 4 is provided on the protrusion 16 to form the inner cavity of the drag tube 2 and to place the pressure gauge 3. A plurality of pressure transmission holes 7 are provided between the blind hole 4 and the through-path of the connecting tube 1 to connect the two. The pressure in the through-path of the connecting tube 1 is transmitted to the blind hole 4 for measurement by the pressure gauge 3. The pressure gauge 3 is assembled and placed in the blind hole 4 and lowered into the well with the main tool body. The pressure gauge 3 is arranged outside the through-path of the connecting tube main tool body, without occupying the through-path space of the main tool body. On the basis of ensuring the normal operation of the main tool body, the pressure gauge 3 is realized to collect data such as pressure when it is lowered into the well, so as to solve the problem that the current built-in pressure gauge affects the normal operation, and at the same time solve the problem that some external pressure gauges are easy to fall off due to contact with the external force of the well wall.

[0028] In order to improve the stability of the pressure gauge 3 in the downhole operation, shock-absorbing springs 9 are provided at the upper and lower ends of the pressure gauge 3, and the top of the shock-absorbing spring 9 at the upper end is provided with a locking mechanism fixed to the inner wall of the blind hole 4 and locked with the cable 6. The shock-absorbing spring 9 at the upper end of the pressure gauge 3 abuts against the locking mechanism, and the shock-absorbing spring 9 at the lower end of the pressure gauge 3 abuts against the inner bottom surface of the blind hole 4, thereby realizing a shock-absorbing and buffering effect on the pressure gauge 3 and avoiding damage to the pressure gauge 3.

[0029] In order to realize the assembly and fixation of the upper damping spring 9 and the stable connection between the cable 6 and the pressure gauge 3, a locking mechanism fixed to the inner wall of the blind hole 4 and locked with the cable 6 is provided at the top of the upper damping spring 9. After the locking mechanism is assembled with the inner wall of the blind hole 4, it contacts the upper damping spring 9 and presses it against the upper end of the pressure gauge 3 to realize the assembly and fixation of the upper damping spring 9. After assembly, the locking mechanism also realizes the locking effect with the cable 6 to avoid the problem of the cable 6 being disconnected at the connection with the pressure gauge 3 under the pulling effect, improves the reliability of the connection between the cable 6 and the pressure gauge 3, and realizes the sealing of the top end of the blind hole 4.

[0030] In order to achieve the locking effect on the cable 6, specifically, the sealing joint 5, which passes the cable 6 and is connected to the inner wall of the blind hole 4, is preferably threadedly connected to the inner wall of the blind hole 4. After the connection, the sealing joint 5 presses the shock-absorbing spring 9 against the upper end of the pressure gauge 3 to achieve the assembly and fixation of the upper shock-absorbing spring 9.

[0031] A locking sleeve 17 that can be deformed by external force and pressed against the outer wall of the cable 6 is embedded in a cone shape in the outer port of the sealing joint 5, and a clamping sleeve 18 that drives the locking sleeve 17 to deform is inserted into the outer end of the sealing joint 5. After the sealing joint 5 is threadedly connected to the inner wall of the blind hole 4, the locking sleeve 17 is then inserted on the cable 6 and embedded in the conical surface of the inner port of the sealing joint 5. Then, the clamping sleeve 18 is inserted on the cable 6 and preferably threadedly connected to the outer wall of the top end of the sealing joint 5. The locking sleeve 17 is driven downward by the rotation of the clamping sleeve 18, and the locking sleeve 17 is radially squeezed by the conical surface of the inner port of the sealing joint 5, so that the inner wall of the locking sleeve 17 is pressed against the outer wall of the cable 6, thereby achieving the locking of the cable 6 by the sealing joint 5, that is, achieving a reliable connection between the cable 6 and the pressure gauge 3.

[0032] In order to realize the assembly of the optical fiber 12, a groove 11 for embedding the optical fiber 12 is opened on the side wall of the raised portion 16, and a pressure plate 13 for limiting the optical fiber 12 in the groove 11 is installed on the side wall of the raised portion 16. After the optical fiber 12 is embedded and placed in the groove 11, the pressure plate 13 is pressed against the optical fiber 12, and the pressure plate 13 is fixed to the side wall of the raised portion 16 of the connecting tube 1 using bolts 14, so that the optical fiber 12 and the pressure gauge 3 are lowered into the well together, and the wear of the optical fiber in the well is prevented, which makes it impossible to collect the optical fiber.

[0033] In order to achieve the flatness of the outer surface of the bracket, the outer surface of the pressing plate 13 is flush with the side wall surface of the protrusion 16, the hole for connecting the bolt 14 on the pressing plate 13 is a countersunk hole, and the bolt 14 is a countersunk bolt.

[0034] In order to ensure the sealing effect of the blind hole 4 , ensure the pressure in the blind hole 4 , and avoid inaccurate pressure measurement data, an O-type elastic sealing ring 10 is crimped between the sealing joint 5 and the inner wall of the blind hole 4 .

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photoelectric integrated pressure gauge drag tube, characterized in that: The invention comprises a main tool body and a drag barrel (2), wherein the drag barrel (2) is arranged outside the normal working path of the main tool body, a pressure gauge (3) and a cable (6) connected to the pressure gauge (3) and extending to the outside of the well are arranged in the drag barrel (2), and an optical fiber (12) extending to the outside of the well is also embedded in the main tool body.

2. The photoelectric integrated pressure gauge drag tube according to claim 1, characterized in that: The main tool body comprises an upper joint (8), a connecting tube (1) and a lower joint (15) which are connected in sequence. A protrusion (16) is provided on the outer wall of the connecting tube (1) to protrude outwards. A blind hole (4) is provided on the protrusion (16) to form the inner cavity of the drag tube (2) and to place the pressure gauge (3). A plurality of pressure transmission holes (7) are provided between the blind hole (4) and the through diameter of the connecting tube (1) to connect the two.

3. The photoelectric integrated pressure gauge drag tube according to claim 2, characterized in that: The pressure gauge (3) is provided with a shock absorbing spring (9) at both the upper and lower ends, and a locking mechanism is provided at the top end of the shock absorbing spring (9) at the upper end, which is fixed to the inner wall of the blind hole (4) and locked with the cable (6).

4. The photoelectric integrated pressure gauge drag tube according to claim 3, characterized in that: The locking mechanism comprises a sealing joint (5) through which a cable (6) is passed and connected to the inner wall of a blind hole (4); a locking sleeve (17) which can be deformed by external force and pressed against the outer wall of the cable (6) is embedded in a cone shape in the outer end of the sealing joint (5); and a clamping sleeve (18) which drives the locking sleeve (17) to deform is inserted into the outer end of the sealing joint (5).

5. The photoelectric integrated pressure gauge drag tube according to claim 4, characterized in that: A groove (11) for embedding the optical fiber (12) is provided on the side wall of the raised portion (16), and a pressure plate (13) for limiting the optical fiber (12) in the groove (11) is arranged on the side wall of the raised portion (16).

6. The photoelectric integrated pressure gauge drag tube according to claim 5, characterized in that: The pressing plate (13) is connected to the side wall of the raised portion (16) via bolts (14).

7. The photoelectric integrated pressure gauge drag tube according to claim 6, characterized in that: The outer surface of the pressing plate (13) is flush with the side wall surface of the raised portion (16); the hole on the pressing plate (13) for connecting the bolt (14) is a countersunk hole; and the bolt (14) is a countersunk bolt.

8. The photoelectric integrated pressure gauge drag tube according to claim 4, characterized in that: An O-type elastic sealing ring (10) is crimped between the sealing joint (5) and the inner wall of the blind hole (4).

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