Novel multi-parameter logging instrument buffer

Abstract

The utility model discloses a novel multi-parameter logging instrument buffer which comprises a tail cone, a hanging ball head and a buffer mechanism. The hanging ball head, the buffer mechanism and the tail cone are sequentially connected from top to bottom; a ball head is arranged at the upper end of the hanging ball head, and the buffer is connected with the multi-parameter logging instrument through the ball head, so that the buffer can swing relative to the multi-parameter logging instrument. The swing device can swing relative to the multi-parameter logging instrument, and the radial moving speed of the multi-parameter logging instrument can be reduced when the multi-parameter logging instrument encounters resistance. The impact force releasing device is good in impact force releasing effect and stable in performance, damage to the multi-parameter logging instrument caused by sudden impact force generated by sudden resistance and the like is reduced, working quality is improved, and logging construction operation is more reasonable.

Description

Technical Field

[0001] This utility model relates to the field of downhole tool technology, specifically a novel multi-parameter logging tool buffer. Background Technology

[0002] As oilfield exploration and development continue to deepen, more and more old wells are emerging. In order to improve the recovery rate of crude oil, wells that need to be maintained and tested are also emerging.

[0003] Currently, multi-parameter logging tools are used for operations such as depth calibration and positioning of oil and water wells. The key components of this logging tool are the scintillation crystal and the photomultiplier tube, both of which are made of glass and are extremely susceptible to damage from impacts.

[0004] Due to the complex internal conditions of the oil and water wells being tested, the multi-parameter logging tool suddenly encountered resistance during its insertion, causing a significant impact on the tool. In severe cases, this could lead to the scintillation crystal and photomultiplier tube inside the tool breaking and becoming damaged, rendering the multi-parameter logging tool inoperable.

[0005] To reduce damage to multi-parameter logging tools caused by sudden impact forces due to unexpected obstruction or other reasons, it is necessary to develop a buffer device that is connected to the lower end of the multi-parameter logging tool and has a simple structure, convenient operation, high safety, and good reliability.

[0006] Publication No. CN203939497U discloses a buffer for oil and water well testing, belonging to the technical field of downhole testing tools for oil and water wells in oilfield well testing operations. It consists of a guide head, a center rod, a hanging ring, a spring, and an adjusting ring. The upper end of the center rod is threadedly connected to a weight rod. The hanging ring, spring, and adjusting ring are sequentially installed on the outer wall of the center rod. The lower end of the center rod is installed in the cavity at the upper end of the guide head and suspended from the hanging ring. The guide head is threadedly connected to the hanging ring. The beneficial effect of this utility model is that by adding a buffer to the lower end of the oil and water well testing instrument, it reduces the impact, solves the quality risks of instrument damage or falling into the well during testing, reduces the occurrence of testing operation accidents, and improves the accuracy of test data.

[0007] Publication (Announcement) No.: CN205503116U discloses a shock-absorbing and damage-preventing device for a downhole electronic pressure gauge, comprising a connector for connecting the electronic pressure gauge, a guide rod, a first spring, a second spring, an elastic arched sleeve, a casing, and a probe; the connector, guide rod, casing, and probe are connected sequentially from top to bottom; the casing can move up and down along the guide rod; the first spring and the elastic arched sleeve are sequentially sleeved on the guide rod from top to bottom, and the second spring is installed inside the casing; a pressure sensor is provided at the top of the probe, and the connector is provided with a transmitting antenna for transmitting pressure sensor data signals.

[0008] Publication (Announcement) No.: CN202882891U discloses a well test anti-sticking device, belonging to the technical field of protection devices for downhole data instruments in oil and gas well testing. It consists of a pressure cap, a pressure spring, a main shaft, a resistance element, and a pressure cap. The pressure cap is a hollow tubular body with a connecting thread at the upper end and an inner shoulder in the middle of its inner tube wall. The resistance element is a solid cone with a larger upper part and a smaller lower part, with a stepped groove on its upper part and a main shaft threadedly connected to it. The main shaft passes through the central through hole of the pressure cap and sits on the shoulder in the middle of the inner tube wall of the pressure cap through a nut. A pressure spring is sleeved on the main shaft. Slides are evenly distributed on the outer circumference of the resistance element. A pulley with a shaft is installed in the slide through the pressure spring. A pressure cap is threadedly connected to the lower end of the resistance element.

[0009] The aforementioned existing technology, once connected to the logging instrument, cannot swing relative to the logging instrument; it can only mitigate the impact through springs.

[0010] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0011] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a new type of multi-parameter logging tool buffer.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A novel multi-parameter logging tool buffer includes a tail cone, a connecting ball head, and a buffer mechanism; the connecting ball head, the buffer mechanism, and the tail cone are connected sequentially from top to bottom; the connecting ball head is provided with a ball head at its upper end, which is connected to the multi-parameter logging tool, allowing the buffer to swing relative to the multi-parameter logging tool.

[0014] Furthermore, the attachment ball head has a supporting part below the ball head.

[0015] Furthermore, the lower end of the coccyx is designed as a streamlined cone.

[0016] Furthermore, the buffer mechanism includes a buffer housing, a buffer spring, and a buffer push rod;

[0017] Specifically, the upper end of the buffer housing is connected to the lower end of the hanging ball head by a thread, and a limiting platform is provided on the inner wall of the lower end of the buffer housing;

[0018] Specifically, the buffer push rod is a stepped shaft with a large-diameter upper shaft and a small-diameter lower shaft, and the large-diameter shaft of the buffer push rod is inside the buffer housing;

[0019] Specifically, the buffer spring is installed inside the buffer housing. The upper end of the buffer spring is attached to the lower end of the ball head, and the lower end of the buffer push rod is attached to the upper end of the large diameter shaft, so that the large diameter shaft of the buffer push rod sits on the limiting platform.

[0020] Furthermore, the major diameter of the buffer push rod is smaller than the inner diameter of the buffer housing but larger than the inner diameter of the limiting platform, while the minor diameter of the buffer push rod is smaller than the inner diameter of the limiting platform.

[0021] Furthermore, the buffer housing wall is provided with a housing pressure relief hole, which is never blocked by the large diameter shaft of the buffer push rod.

[0022] Furthermore, the buffer push rod is provided with a buffer push rod through hole.

[0023] Furthermore, the lower end of the buffer push rod is connected to the coccyx via a conversion connector;

[0024] Specifically, the adapter is a threaded sleeve, with an internal thread for the push rod at the upper end and an internal thread for the tail cone at the lower end, and an air guide hole on the wall of the adapter;

[0025] Specifically, the lower end of the buffer push rod is provided with an external thread, and the upper end of the tail cone is provided with an external thread.

[0026] Furthermore, a weight-reinforcing bar is also provided between the adapter and the coccyx;

[0027] Specifically, the upper end of the weighting rod is provided with an external threaded joint, which is connected to the internal thread of the lower end of the shock absorber push rod. The lower end of the weighting rod is provided with an internal threaded joint, which is connected to the external thread of the upper end of the tailbone.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. This utility model has a good effect on releasing impact force and stable performance. It not only reduces the damage to multi-parameter logging tools caused by sudden impact force due to sudden obstruction and other reasons, but also improves the quality of work.

[0030] 2. This utility model is small in size, simple in structure, easy to operate, highly safe, and reliable.

[0031] 3. This utility model can swing relative to the multi-parameter logging tool, which can reduce the radial movement speed of the multi-parameter logging tool when encountering resistance. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a novel multi-parameter logging tool buffer according to this utility model;

[0033] Figure 2This is a schematic diagram of the structure of the ball head of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the buffer housing of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the buffer push rod of this utility model;

[0036] Figure 5 This is a schematic diagram of the structure of the adapter of this utility model;

[0037] Figure 6 This is a schematic diagram of the coccyx structure of this utility model.

[0038] In the diagram: 1. Hanging ball head; 2. Buffer housing; 3. Housing pressure relief hole; 4. Buffer spring; 5. Buffer push rod; 6. Buffer push rod through hole; 7. Adaptor connector; 8. Tail cone; 9. Ball head; 10. Supporting part; 11. Limiting platform; 12. Air guide hole. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Example 1:

[0041] Please see Figures 1 to 6 The present invention provides a novel multi-parameter logging tool buffer, comprising a hanging ball head 1, a buffer mechanism, and a tail cone 8 connected sequentially from top to bottom.

[0042] The upper end of the hook ball head 1 is provided with a ball head 1, which is connected to the multi-parameter logging tool. This allows the buffer to swing relative to the multi-parameter logging tool, reducing radial impact. In the prior art, even when encountering small obstacles, the buffer will still generate impact, and the resulting force can cause the entire tubing string to move rapidly. With the hook ball head 1, when encountering small obstacles, the buffer can swing directly through. The smaller tilt angle of the sidewall significantly reduces the movement speed of the tubing string, thereby protecting the multi-parameter logging tool. The hook ball head 1 is provided with a holding part 10 below the ball head, which facilitates the holding with a wrench and the assembly of the buffer.

[0043] The buffer mechanism includes a buffer housing 2, a buffer spring 4, and a buffer push rod 5. The upper end of the buffer housing 2 is threadedly connected to the lower end of the hanging ball head 1, and a limiting platform 11 is provided on the inner wall of the lower end of the buffer housing 2. The buffer push rod 5 is a stepped shaft with a large diameter shaft on top and a small diameter shaft on the bottom. The diameter of the large diameter shaft of the buffer push rod 5 is smaller than the inner diameter of the buffer housing 2 and larger than the inner diameter of the limiting platform 11. The diameter of the small diameter shaft of the buffer push rod 5 is smaller than the inner diameter of the limiting platform 11. The large diameter shaft of the buffer push rod 5 is inside the buffer housing 2. The buffer spring 4 is provided inside the buffer housing 2. The buffer spring 4 pushes against the lower end of the hanging ball head 1 and the upper end of the large diameter shaft of the buffer push rod 5, so that the large diameter shaft of the buffer push rod 5 sits on the limiting platform 11.

[0044] The lower end of the coccyx 8 is designed as a streamlined cone.

[0045] The function of the buffer push rod 5 is to push the buffer spring 4 to absorb the impact force generated when the multi-parameter logging tool suddenly encounters resistance.

[0046] The function of the buffer spring 4 is to absorb and release the impact force generated when encountering resistance, so as to turn the rigid impact into a flexible impact.

[0047] Furthermore, the buffer housing 2 is provided with a housing pressure relief hole 3 on its wall. The housing pressure relief hole 3 is never blocked by the large diameter shaft of the buffer push rod 5. The function of the housing pressure relief hole 3 is to facilitate the discharge of well fluid inside the buffer housing 2 when the buffer spring 4 is compressed, and also to facilitate the use of the hole by the hook wrench, which is convenient for assembling the buffer.

[0048] Furthermore, the buffer push rod 5 is provided with a buffer push rod through hole 6. The function of the buffer push rod through hole 6 is to facilitate the use of the hook wrench and to facilitate the assembly of the buffer.

[0049] Furthermore, the lower end of the buffer push rod 5 is connected to the tail cone 8 via a conversion connector 7. The conversion connector 7 is a threaded sleeve, with an internal thread for the push rod at the upper end and an internal thread for the tail cone at the lower end. An air guide hole 12 is provided on the wall of the conversion connector 7 to prevent air lock caused by threaded sealing from affecting installation, and also to facilitate the use of the hole by the hook wrench. The lower end of the buffer push rod 5 is provided with an external thread for the push rod, and the upper end of the tail cone 8 is provided with an external thread for the tail cone.

[0050] Furthermore, a weighted rod is provided between the adapter 7 and the tail cone 8. The upper end of the weighted rod has an external threaded connector and is connected to the internal thread of the lower tail cone of the buffer push rod 5. The lower end of the weighted rod has an internal threaded connector and is connected to the external thread of the upper tail cone of the tail cone 8. It should be noted that the weighted rod itself is prior art, and its function is to counteract the frictional force during well access. Its structure is clear to those skilled in the art, therefore, drawings are not provided.

[0051] Example 2:

[0052] This embodiment provides a method for using a novel multi-parameter logging tool buffer, specifically including the following steps:

[0053] S1. The multi-parameter logging tool buffer is attached to the lower part of the multi-parameter logging tool and lowered into the well;

[0054] S2. When the logging tool encounters sudden obstruction during the descent, the tail cone 8 pushes the conversion joint 7 and the buffer push rod 5. The buffer push rod 5 then pushes the buffer spring 4, causing the buffer spring 4 to compress and absorb and release the impact force generated when the obstruction occurs, thus turning the rigid impact into a flexible impact and achieving the function of protecting the multi-parameter logging tool.

[0055] When the buffer spring 4 is compressed, the well fluid inside the buffer housing 2 will be discharged through the pressure relief hole 3 of the housing;

[0056] S3. During the lowering process, the ball head 1 is attached so that the multi-parameter logging tool buffer can swing relative to the multi-parameter logging tool. When it encounters some small obstacles, it swings directly, and the sidewall contacts the obstacle at a small angle, which reduces the radial movement speed of the multi-parameter logging tool.

[0057] S4. After the construction is completed, remove the multi-parameter logging tool buffer, clean and lubricate all parts for use in the next construction.

[0058] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0059] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel multi-parameter logging tool buffer, comprising a tail cone, characterized in that, It also includes the ball head and the buffer mechanism; The hanging ball head, buffer mechanism, and tail cone are connected in sequence from top to bottom; The upper end of the hanging ball head is provided with a ball head, which is connected to the multi-parameter logging instrument, so that the buffer can swing relative to the multi-parameter logging instrument; The buffer mechanism includes a buffer housing, a buffer spring, and a buffer push rod; The upper end of the buffer housing is connected to the lower end of the hanging ball head by a thread, and a limit platform is provided on the inner wall of the lower end of the buffer housing; The buffer push rod is a stepped shaft with a large upper diameter shaft and a small lower diameter shaft, and the large diameter shaft of the buffer push rod is inside the buffer housing; The buffer spring is installed inside the buffer housing. The upper end of the buffer spring is attached to the lower end of the ball head, and the lower end of the buffer push rod is attached to the upper end of the large diameter shaft of the buffer push rod, so that the large diameter shaft of the buffer push rod sits on the limiting platform. The buffer housing wall is provided with a housing pressure relief hole, which is never blocked by the large diameter shaft of the buffer push rod.

2. The novel multi-parameter logging tool buffer according to claim 1, characterized in that, The attachment ball head has a supporting part below the ball head.

3. The novel multi-parameter logging tool buffer according to claim 1, characterized in that, The lower end of the coccyx is designed as a streamlined cone.

4. A novel multi-parameter logging tool buffer according to claim 1, characterized in that, The major diameter of the buffer push rod is smaller than the inner diameter of the buffer housing but larger than the inner diameter of the limiting platform, while the minor diameter of the buffer push rod is smaller than the inner diameter of the limiting platform.

5. A novel multi-parameter logging tool buffer according to claim 1, characterized in that, The buffer push rod is provided with a buffer push rod through hole.

6. A novel multi-parameter logging tool buffer according to claim 1, characterized in that, The lower end of the buffer push rod is connected to the coccyx via a conversion connector; The adapter is a threaded sleeve, with an internal thread for the push rod at the upper end and an internal thread for the tail cone at the lower end. An air guide hole is provided on the wall of the adapter. The lower end of the buffer push rod is provided with an external thread, and the upper end of the coccyx is provided with an external thread.

7. A novel multi-parameter logging tool buffer according to claim 6, characterized in that, A weight-reinforcing bar is also provided between the adapter and the coccyx. The upper end of the weighting rod is provided with an external threaded joint, which is connected to the internal thread of the lower end of the coccyx of the buffer push rod. The lower end of the weighting rod is provided with an internal threaded joint, which is connected to the external thread of the upper end of the coccyx.

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