Centralizer for petroleum logging equipment
By designing wear-resistant protrusions and sealing gaskets on the centralizer, the problem of reduced sealing caused by easy wear of traditional threaded connections is solved, achieving high sealing performance and low maintenance costs in extreme environments, and ensuring the stability of drilling and oil transportation processes.
Patent Information
- Application Number
- CN202520935944.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-05-13
AI Technical Summary
Traditional threaded connections are prone to wear in complex downhole environments, leading to reduced sealing performance and high disassembly and maintenance costs. They are particularly susceptible to sealing failure in long-distance pipelines or subsea pipelines, impacting drilling efficiency and safety.
The design incorporates wear-resistant protrusions and sealing gaskets. Through threaded connections and limiting ends, it ensures that the sealing gasket is compressed and encased during the connection process. The rubber sealing gasket recovers its deformation, enhancing the sealing performance. The drilling direction is stabilized by the centering platform and wear-resistant protrusions.
It improves the sealing performance of oil pipelines and drill string connections, prevents oil leaks, reduces maintenance costs, enhances structural strength and sealing durability in extreme environments, and ensures the stability of drilling and oil transportation processes.
Smart Images
Figure CN223854185U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the drilling engineering technical field, concretely relates to a centralizer for petroleum logging equipment. BACKGROUND
[0002] In the petroleum logging and drilling operation, the centralizer (stabilizer) is the key tool for ensuring the perpendicularity of the drilling tool and the well trajectory control. The traditional threaded connection mode realizes the fixation through the screwing of the inner and outer threads of the drilling rod and the centralizer, and its advantage lies in simple structure and good initial sealing. However, in the complex downhole environment, the drilling tool is subjected to high-frequency vibration, formation pressure fluctuation and drilling fluid corrosion for a long time, and the threaded connection part is prone to micro deformation or wear. With the gradual expansion of the gap, the effectiveness of the sealing gasket or the threaded sealant is attenuated, which leads to the leakage of the drilling fluid or oil and gas from the gap, not only reducing the drilling efficiency, but also possibly causing the wellbore instability, well deviation exceeding the standard and other problems, and even accelerating the corrosion damage of the downhole instrument. In addition, the disassembly and maintenance of the threaded connection need special tools, and the repair cost is high in deep well operation, further highlighting the defect of its long-term reliability.
[0003] In the oil pipeline system, the centralizer is also relied on the threaded or flanged butt joint with the pipeline as the stable component of the pipeline connection. In the oil transportation process, the pipeline is subjected to the internal oil pressure impact, thermal expansion and contraction caused by temperature change and external soil stress, and the threaded connection part is prone to periodic fretting friction, leading to the aging and cracking of the sealing material (such as rubber ring or polytetrafluoroethylene gasket). At the same time, the corrosive components such as hydrogen sulfide in oil and gas will erode the threaded surface, aggravating the risk of sealing failure. Once leakage occurs, not only energy waste and environmental pollution are caused, but also safety hazards may be caused due to the accumulation of oil and gas. The existing design has limited adaptability to dynamic working conditions, especially in extreme environments such as long-distance pipelines or submarine pipelines, and the traditional connection mode is difficult to balance the structural strength and sealing durability.
[0004] Based on this, the utility model provides a centralizer for petroleum logging equipment to solve the problems existing in the prior art. UTILITY MODEL CONTENTS
[0005] Therefore, the main purpose of the utility model is to provide a centralizer for petroleum logging equipment to solve the problem of reduced sealing performance at the gap between the oil pipeline and the traditional centralizer in long-term use, which is prone to oil leakage.
[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:
[0007] The utility model provides a centralizer for petroleum logging equipment, including centralizer main part, first connecting mechanism and second connecting mechanism are arranged at the both ends of centralizer main part respectively, first connecting mechanism and second connecting mechanism are same in structure, and all include limit end, threaded connection end and sealing end, limit end is arranged at the end position of centralizer main part, threaded connection end is arranged at the end position of limit end, sealing end is arranged at the end position of threaded connection end, and the end of sealing end is provided with sealing washer.
[0008] In a preferred embodiment, the centralizer main body is provided with a plurality of wear-resistant protrusions on the outer surface of the centralizer platform.
[0009] In a preferred embodiment, the wear-resistant protrusions are evenly distributed on the outer surface of the centralizer platform.
[0010] In a preferred embodiment, the centralizer main body is provided with a fluid passage in the middle.
[0011] In a preferred embodiment, the first connecting mechanism and the second connecting mechanism are each provided with a flow guide passage in the middle, which communicates with the fluid passage.
[0012] In a preferred embodiment, the sealing washer is a rubber component.
[0013] In a preferred embodiment, the sealing washer is matched with the outer surface of the sealing end.
[0014] In a preferred embodiment, the threaded connection end is provided with an external thread, which is threadedly connected with a locking threaded sleeve provided at the end of the drill pipe column or the oil pipeline.
[0015] In a preferred embodiment, the limit end is provided with a clearance slot, which is clamped and connected with a locking clamping member provided at the end of the drill pipe column or the oil pipeline.
[0016] In a preferred embodiment, the two adjacent locking clamping members in the same group are connected by a pin.
[0017] Compared with the prior art, the centralizer for petroleum logging equipment has the following advantages:
[0018] 1. By providing the first connecting mechanism and the second connecting mechanism, when the centralizer main body is connected to the end of the oil pipeline through the first connecting mechanism and the second connecting mechanism, the end inner wall of the oil pipeline extrudes and covers the sealing washer on the sealing end during the connection process. The dynamic sealing effect of the recovery deformation of the sealing washer made of rubber can strengthen the sealing performance of the connection between the sealing end and the oil pipeline, and avoid oil leakage during oil transportation.
[0019] 2. By the setting of the righting table and the wear-resistant protrusion, the drilling direction can be stabilized.
[0020] 3. By the setting of the threaded connection end and the limiting end, the connection of different connection structures of the end of the drill pipe column or the oil pipeline can be matched, the applicability of the righting device in use is ensured, and the problem of the reduced sealing performance of the gap between the oil pipeline and the traditional righting device and the easy oil leakage is solved. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by the drawings without creative labor.
[0022] Figure 1 It is a whole structure schematic view of the righting device for the petroleum logging equipment;
[0023] Figure 2 It is a side view structure schematic view of the righting device for the petroleum logging equipment;
[0024] Figure 3 It is a righting device main body cross section structure schematic view of the righting device for the petroleum logging equipment;
[0025] Figure 4 It is a first connection mechanism structure schematic view of the righting device for the petroleum logging equipment.
[0026] Figure 5 It is a sectional view of the righting device for the petroleum logging equipment when the locking threaded sleeve is installed;
[0027] Figure 6 It is a sectional view of the righting device for the petroleum logging equipment when the locking clamping piece is installed.
[0028] MAIN COMPONENT SYMBOL DESCRIPTION
[0029] 1, righting device main body; 2, righting table; 3, wear-resistant protrusion; 4, first connection mechanism; 5, second connection mechanism; 6, fluid passage; 7, flow guide passage; 8, limiting end; 9, threaded connection end; 10, sealing end; 11, sealing washer; 12, locking threaded sleeve; 13, locking clamping piece. DETAILED DESCRIPTION
[0030] The structure of the centralizer for petroleum logging equipment will be further described in detail below in combination with the drawings and the embodiments of the present application.
[0031] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflicts. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0033] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units listed, but can include other steps or units not listed or inherent to these processes, methods, products or devices.
[0034] For ease of description, spatial relative terms such as "over", "above", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0035] As shown in the description accompanying drawings Figures 1-6 The present application provides a technical scheme:
[0036] The utility model provides a centralizer for petroleum logging equipment, including centralizer main part 1, both ends of centralizer main part 1 are equipped with the first connecting mechanism 4 and the second connecting mechanism 5 respectively for connecting, the first connecting mechanism 4 and the second connecting mechanism 5 are same in structure, all include limiting end 8, threaded connection end 9 and sealing end 10, limiting end 8 is fixedly connected in the end position of centralizer main part 1, threaded connection end 9 is fixedly connected in the end position of limiting end 8, sealing end 10 is fixedly connected in the end position of threaded connection end 9, and sealing washer 11 is arranged in the end position of sealing end 10, when the centralizer is used as the connecting piece of stable oil pipeline connection, centralizer main part 1 is connected in the end position of oil pipeline through the first connecting mechanism 4 and the second connecting mechanism 5, in the connecting process, the end inner wall of oil pipeline extrudes sealing washer 11 and covers on sealing end 10, can strengthen the sealing property of sealing end 10 and oil pipeline connection by the sealing effect of the recovery deformation of rubber-made sealing washer 11, avoids the oil leakage when oil conveying.
[0037] In one embodiment, as shown in Figure 1 、 Figure 2 and Figure 3 , a plurality of equidistantly spaced centralizer platforms 2 are provided on the outer side of the centralizer main body 1, and a plurality of equidistantly spaced wear-resistant protrusions 3 are provided on the centralizer platforms 2. When the centralizer is used as a tool for stabilizing the drilling direction of a downhole drilling tool, the centralizer main body 1 is connected to the drill string of the drilling tool through the first connecting mechanism 4 and the second connecting mechanism 5. After the connection is completed, the centralizer platforms 2 and the wear-resistant protrusions 3 can stabilize the drilling direction.
[0038] In one embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , the threaded connection end 9 is provided with external threads, and is screwed with a locking threaded sleeve 12 provided at the end of the drill string or the oil pipeline. In use, the external threads of the threaded connection end 9 are aligned with the internal threads of the locking threaded sleeve 12, the sealing end 10 is pulled into the end hole of the drill string or the oil pipeline by rotating the locking threaded sleeve 12, and the centralizer main body 1 is installed between two drill strings or oil pipelines.
[0039] In one embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4and Figure 6 As shown in the drawings, the limiting end 8 is provided with a let-out clamping groove, the let-out clamping groove is clamped and connected with the locking clamping piece 13 arranged at the end of the drill pipe column or the oil pipeline, the same group of two adjacent locking clamping pieces 13 are connected with a pin, the centralizer main body 1 is installed between the two drill pipe columns or the oil pipelines.
[0040] The implementation principle of the centralizer for the oil logging equipment in the embodiment is as follows:
[0041] When the centralizer is used as a tool for stabilizing the drilling direction of the downhole drilling tool, the centralizer main body 1 is connected with the drill pipe column of the drilling tool through the first connecting mechanism 4 and the second connecting mechanism 5, after the connection is completed, the stabilizing platform 2 and the wear-resistant protrusion 3 are arranged to stabilize the drilling direction;
[0042] When the centralizer is used as a connecting piece for stabilizing the connection of the oil pipeline, the centralizer main body 1 is connected with the end position of the oil pipeline through the first connecting mechanism 4 and the second connecting mechanism 5, in the connection process, the end inner wall of the oil pipeline extrudes and covers the sealing end 10 with the sealing washer 11, the sealing property of the connection with the oil pipeline is strengthened, and the oil leakage during the oil transportation is avoided.
[0043] The above only describes the preferred embodiment of the present application, and is not used to limit the protection scope of the present application.
Claims
1. A centralizer for oil well logging equipment comprising a centralizer body (1), characterized in that, The first connecting mechanism (4) and the second connecting mechanism (5) are arranged at the two ends of the centralizer body (1) respectively, the first connecting mechanism (4) and the second connecting mechanism (5) are the same in structure, and each comprises a limiting end head (8), a threaded connecting end (9) and a sealing end (10), the limiting end head (8) is arranged at the end position of the centralizer body (1), the threaded connecting end (9) is arranged at the end position of the limiting end head (8), the sealing end (10) is arranged at the end position of the threaded connecting end (9), and the end of the sealing end (10) is provided with a sealing gasket (11).
2. A centralizer for use in oil well logging equipment as defined in claim 1, wherein The centralizer body (1) is provided with a centralizer platform (2) arranged at equal intervals on the outer side, and a plurality of wear-resistant protrusions (3) are arranged on the centralizer platform (2).
3. A centralizer for use in oil well logging equipment as defined in claim 2, wherein The wear-resistant protrusions (3) are distributed at equal intervals on the outer surface of the centralizer platform (2).
4. The centralizer for use in a petroleum logging apparatus as recited in claim 1, wherein The centralizer body (1) is provided with a fluid channel (6) in the middle.
5. A centralizer for use in oil well logging equipment as defined in claim 4, wherein The first connecting mechanism (4) and the second connecting mechanism (5) are each provided with a flow guide channel (7) in the middle, and the flow guide channel (7) is communicated with the fluid channel (6).
6. A centralizer for use in a petroleum logging apparatus as defined in claim 1, wherein The sealing gasket (11) is a rubber component.
7. A centralizer for use in a petroleum well logging apparatus as defined in claim 1, wherein The sealing gasket (11) is matched with the outer side of the sealing end (10).
8. A centralizer for use in a petroleum well logging apparatus as defined in claim 1, wherein The threaded connecting end (9) is provided with external threads, and the external threads are threadedly connected with a locking threaded sleeve (12) arranged at the end of a drill rod column or an oil pipeline.
9. The centralizer for use in a petroleum logging apparatus as recited in claim 1, wherein The limiting end head (8) is provided with a gap clamping groove, and the gap clamping groove is clamped and connected with a locking clamping piece (13) arranged at the end of the drill rod column or the oil pipeline.
10. A centralizer for use in a petroleum logging apparatus as defined in claim 9, wherein The two adjacent locking clamping pieces (13) in the same group are connected through a pin.