阅读说明：本技术 一种应用于生产测井过程中的铁屑吸附装置 (Be applied to iron fillings adsorption equipment of production logging in-process ) 是由 朱梦钦 徐宇航 宋治国 刘洋 马文慧 张圆 冯毅 董学强 刘正波 吴大鹏 于 2021-08-16 设计创作，主要内容包括：本发明公开了一种应用于生产测井过程中的铁屑吸附装置,包括装置中心杆、装置上接头、装置下接头、中心杆磁隔绝体、磁性吸附体以及装置外壳；装置中心杆为圆柱体,其两端设有连接装置上接头、装置下接头的外螺纹；装置上接头、装置下接头一端分别设有与中心配合的内螺纹；中心杆磁隔绝体为中空的圆柱体,其套接于装置中心杆两端；磁性吸附体为中空圆柱体,其套接于装置中心杆的中部位置；装置外壳套接于装置中心杆及磁性吸附体外部,本发明能大大减少因涡轮转动不灵活而反复施工的概率,既减少了现场工人的工作强度,又节约了施工成本；消减了生产测井施工过程中的安全隐患,减小了长时间施工带来的作业风险,极大增强了生产的安全性。(The invention discloses a scrap iron adsorption device applied to a production logging process, which comprises a device central rod, a device upper joint, a device lower joint, a central rod magnetic isolator, a magnetic adsorbent and a device shell, wherein the device central rod is arranged on the device upper joint; the central rod of the device is a cylinder, and the two ends of the central rod are provided with external threads for connecting the upper joint of the device and the lower joint of the device; inner threads matched with the center are respectively arranged at one end of the upper device joint and one end of the lower device joint; the magnetic insulator of the central rod is a hollow cylinder which is sleeved at two ends of the central rod of the device; the magnetic adsorption body is a hollow cylinder and is sleeved at the middle position of a central rod of the device; the device shell is sleeved outside the device center rod and the magnetic adsorption body, so that the probability of repeated construction due to inflexible rotation of the turbine can be greatly reduced, the working strength of field workers is reduced, and the construction cost is saved; the potential safety hazard in the production logging construction process is reduced, the operation risk brought by long-time construction is reduced, and the production safety is greatly enhanced.)

1. A scrap iron adsorption device applied to a production logging process is characterized by comprising a device central rod, a device upper joint, a device lower joint, a central rod magnetic isolator, a magnetic adsorbent and a device shell; the central rod of the device is a cylinder, and the two ends of the central rod are provided with external threads for connecting the upper joint of the device and the lower joint of the device; internal threads matched with the center are respectively arranged at one end of the device upper joint and one end of the device lower joint; the magnetic insulator of the central rod is a hollow cylinder which is sleeved at two ends of the central rod of the device; the magnetic adsorption body is a hollow cylinder and is sleeved at the middle position of a central rod of the device; the device shell is sleeved outside the device center rod and the magnetic adsorption body, and an annular scrap iron bearing bin is formed between the device shell and the magnetic adsorption body.

2. The iron scrap adsorption device applied to the production logging process is characterized in that the outer diameter of the upper connector of the device is larger than the diameter of the central rod of the device, one end of the upper connector of the device is provided with a first connecting hole with internal threads, the other end of the upper connector of the device is provided with a first outer hole with a conical inner bottom end, the inner end of the first connecting hole is further provided with a sealing ring mounting groove, and the inner wall of the first outer hole is also provided with internal threads.

3. The iron scrap adsorption device applied to the production logging process according to claim 1, wherein the outer diameter of a lower joint of the device is larger than the diameter of a central rod of the device, a second connecting hole with internal threads is formed in one end of the lower joint of the device, a second outer hole is formed in the other end of the lower joint of the device, and the second connecting hole and the second outer hole are both holes with conical inner bottoms.

4. The iron scrap adsorption device applied to the production logging process according to claim 1, wherein a plurality of circles of connecting grooves are formed in the outer portion of one end, close to the second outer hole, of the lower joint of the device.

5. The iron scrap adsorption device applied to the production logging process according to claim 1, wherein the outer diameter of the device shell is the same as the outer diameters of the device upper connector and the device lower connector, and a plurality of through holes are formed in the middle of the device shell at intervals in the circumferential direction.

6. The iron scrap adsorption device applied to the production logging process according to claim 5, wherein the through hole is an elongated hole arranged along the length direction of the device shell.

7. The iron scrap adsorption device applied to the production logging process according to claim 5, wherein the device shell is made of aluminum.

Technical Field

The invention relates to the field of oil and gas well production logging, in particular to a scrap iron adsorption device applied to a production logging process.

Background

Production logging refers to logging in which various testing instruments are used for conducting downhole testing to obtain corresponding underground information in the whole production process from production of oil and gas wells (including oil production wells, gas production wells, water injection wells, observation wells and the like) to abandonment. An important task of production logging is to measure the fluid flow profile of both production and injection wells, with parameters including velocity (flow rate), density, water holdup, temperature, pressure, etc. of the fluid. The properties and the flow of the produced or absorbed fluid of each perforated interval are known, so that the production state and the production characteristics of an oil-gas well can be evaluated, the dynamic characteristics of the oil-gas reservoir can be known and analyzed, and the aims of improving the oil-gas yield and the ultimate recovery rate can be fulfilled finally.

In the implementation process of production logging, the measurement of the speed of fluid mainly relies on the flowmeter to measure, the flowmeter of logging mainly relies on turbine rotation to gather the flow, drive the turbine to rotate when the fluid axially flows through the turbine, the turbine adopts the material of extreme light to make, and install on the jewel bearing, even the very slow turbine of velocity of flow also can rotate, there is a permanent magnet above the turbine, along with the turbine rotation, the magnetic field of permanent magnet also follows the rotation, the magnetic line of force drives the flowmeter internals-flashboard and also follows the rotation, cut the light on the photodiode, and produce the electric pulse and send out the signal and be used for distinguishing the direction, the velocity of flow.

In a gas field production area, due to the influences of geological reasons, underground perforation, gas well maintenance operation and other conditions, a large amount of fine iron filings exist in a shaft, when a flowmeter enters a well, a magnetic cylinder above a turbine of the logging flowmeter is often adsorbed by a large amount of iron filings, the turbine cannot rotate, so that the flow is not worth or can rotate, but serious deviation is generated on logging data, and the flow measurement is abnormal; for example: 1. when the turbine cannot rotate to cause that the flow rate has no value, the single production well logging process must be terminated, then the instrument is lifted into a wellhead well logging blowout preventer, then the instrument is taken out to carry out comprehensive cleaning on the turbine of the flowmeter and then the turbine of the flowmeter enters the well again for testing, the process is repeated for a part of old wells in the northwest region sometimes, and the problem cannot be solved even if the part of test wells are repeatedly operated for a plurality of times, so that the test is finally failed; 2. when the turbine can rotate, but a large amount of iron chips are adsorbed at the magnetic cylinder, the data correctness of production logging is seriously influenced, so that the later interpretation of logging data is influenced, the splitting error of a production layer can be caused due to abnormal flow, a main production layer cannot be determined, and finally, great deviation is generated on the production decision of the oil and gas well, such as understanding and analyzing the dynamic characteristics of the oil and gas reservoir, improving the oil and gas yield and the final recovery rate.

Therefore, designing a scrap iron adsorption device for removing scrap iron in advance in a drifting process in the early stage of logging is a problem which needs to be solved urgently by technical personnel in the related field.

Disclosure of Invention

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a scrap iron adsorption device applied to a production logging process comprises a device central rod, a device upper joint, a device lower joint, a central rod magnetic isolator, a magnetic adsorbent and a device shell; the central rod of the device is a cylinder, and the two ends of the central rod are provided with external threads for connecting the upper joint of the device and the lower joint of the device; internal threads matched with the center are respectively arranged at one end of the device upper joint and one end of the device lower joint; the magnetic insulator of the central rod is a hollow cylinder which is sleeved at two ends of the central rod of the device; the magnetic adsorption body is a hollow cylinder and is sleeved at the middle position of a central rod of the device; the device shell is sleeved outside the device center rod and the magnetic adsorption body, and an annular scrap iron bearing bin is formed between the device shell and the magnetic adsorption body.

Furthermore, the outer diameter of the upper joint of the device is larger than the diameter of the central rod of the device, one end of the upper joint of the device is provided with a first connecting hole with internal threads, the other end of the upper joint of the device is provided with a first outer hole with a conical inner bottom end, a sealing ring mounting groove is further formed in the inner end of the first connecting hole, and internal threads are further formed in the inner wall of the first outer hole.

Furthermore, the outer diameter of the lower joint of the device is larger than the diameter of the central rod of the device, one end of the lower joint of the device is provided with a second connecting hole with internal threads, the other end of the lower joint of the device is provided with a second outer hole, and the second connecting hole and the second outer hole are both holes with conical inner bottoms.

Furthermore, the outer part of one end of the lower joint of the device, which is close to the second outer hole, is provided with a plurality of circles of connecting grooves.

Furthermore, the outer diameter of the device shell is the same as the outer diameters of the device upper connector and the device lower connector, and a plurality of through holes are formed in the middle of the device shell at intervals in the circumferential direction.

Furthermore, the through hole is a long-strip-shaped hole arranged along the length direction of the device shell.

Further, the device housing is aluminum.

After the scheme is adopted, the invention has the following advantages: the invention aims to provide a scrap iron adsorption device which is researched and developed in a downhole tool string in a drifting process at the early stage of logging, wherein scrap iron in a shaft is removed in advance by utilizing the scrap iron adsorption device; in the production logging process, scrap iron in a shaft is removed in advance, and a turbine of the flowmeter does not adsorb or hardly adsorbs the scrap iron; therefore, the problem that a large amount of scrap iron in part of oil and gas well shafts cannot complete production logging is solved, and the correctness of production logging data is improved; providing detailed data support for oil and gas field exploitation; the repetition rate of site construction is reduced, and the labor intensity of constructors is reduced; the safety of the construction site is improved.

The invention can greatly reduce the probability of repeated construction due to inflexible rotation of the turbine, thereby not only reducing the working strength of field workers, but also saving the construction cost; the invention reduces the potential safety hazard in the production logging construction process, reduces the operation risk brought by long-time construction, and greatly enhances the production safety; the method is combined with the well dredging operation in the early period of well logging in the implementation process, so that the operation procedure of a construction site is not increased, and the production cost and the labor cost are not additionally increased; the invention has simple structure of parts and convenient assembly and disassembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a scrap iron adsorption device applied to a production logging process.

FIG. 2 is a schematic structural diagram of a center rod of a scrap iron adsorption device applied to a production logging process.

FIG. 3 is a schematic diagram of the internal structure of the upper connector of the iron chip absorption device applied in the production logging process.

FIG. 4 is a schematic diagram of the external structure of the upper connector of the iron chip absorption device applied in the production logging process.

FIG. 5 is a schematic view of the internal structure of a lower joint of a scrap iron adsorption device applied to a production logging process.

FIG. 6 is a schematic diagram of the external structure of a lower street mounted in a scrap iron adsorption device applied to a production logging process.

FIG. 7 is a schematic structural diagram of a central rod magnetic insulator in an iron filings adsorption device applied to a production logging process.

FIG. 8 is a schematic diagram of the internal structure of the housing of the iron scrap adsorption device applied to the production logging process.

FIG. 9 is a schematic diagram of the external structure of the housing of the iron scrap adsorption device applied to the production logging process.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

A scrap iron adsorption device applied to a production logging process comprises a device central rod 1, a device upper joint 2, a device lower joint 3, a central rod magnetic insulator 4, a magnetic adsorbent 5 and a device shell 6; the device center rod 1 is a cylinder, two ends of the device center rod are provided with a connector 7 for connecting the device upper connector 2 and the device lower connector 3, and an external thread is arranged outside the connector 7; the outer diameter of the upper connector 3 of the device is larger than the diameter of the central rod 1 of the device, one end of the upper connector 2 of the device is provided with a connecting hole I8 with internal threads, the other end of the upper connector of the device is provided with an outer hole I9 with a conical inner bottom end, the inner end of the connecting hole I8 is also provided with a sealing ring mounting groove 10, the inner wall of the outer hole I9 is also provided with internal threads, the internal threads are matched with a production logging drifting tool for connection, and meanwhile, a sealing ring must be mounted in the sealing ring groove for sealing so as to prevent the water from entering the production logging drifting tool and damage the internal circuit structure; the outer diameter of the device lower joint 3 is larger than the diameter of the device central rod 1, one end of the device lower joint 3 is provided with a connecting hole II 11 with internal threads, the other end of the device lower joint is provided with an outer hole II 12, the connecting hole II 11 and the outer hole II 12 are both holes with conical inner bottom ends, and the outer part of one end of the device lower joint 3 close to the outer hole II 12 is provided with a plurality of circles of connecting grooves 13; the central rod magnetic isolator 4 is a hollow cylinder and is sleeved at two ends of the central rod 1 of the device, so that a central magnetic ring can be far away from the upper joint and the lower joint, the upper joint and the lower joint are prevented from being magnetized, and the cleaning and the maintenance of the iron scrap adsorption device can be facilitated; the magnetic adsorption body 5 is a hollow cylinder and is sleeved at the middle position of the central rod 1 of the device; the device shell 6 is sleeved outside the device central rod 1 and the magnetic adsorption body 5, has the same outer diameter as the device upper joint 2 and the device lower joint 3, is made of aluminum, and can be free from the influence of magnetization; the device shell 6 middle part circumference interval is equipped with several through hole 14, forms annular iron fillings between it and the magnetic adsorption body 5 and bears the weight of the storehouse, and its effect can make the iron cut difficult for droing after being adsorbed, can be easier take out the pit shaft.

The iron scrap adsorption device applied to the production logging process is obtained through assembly of all parts, iron scrap in a shaft can be removed in advance through a drifting process before the logging process in the production logging process, so that a flow meter turbine in the logging process does not adsorb iron scrap any more or adsorbs iron scrap very little, the problem that a magnetic cylinder above the flow meter turbine is adsorbed by a large amount of iron scrap in the logging construction process is solved, and the problems that production logging cannot be completed by a large amount of iron scrap in part of oil and gas shafts and the correctness of production logging data is seriously influenced by iron scrap factors are solved.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.