Novel direct-push storage type logging drilling tool adapter

Abstract

The utility model discloses a novel direct push storage type logging drilling tool adapter which comprises a drilling tool adapter body, a suspension joint, a suspension short section and an instrument adapter body, the upper end of the drilling tool adapter body is used for being connected with a drilling tool, and the lower end of the instrument adapter body is used for being connected with a logging instrument string. The drilling tool adapter and the suspension joint are both provided with upper and lower openings and are internally provided with cavities penetrating through the upper and lower openings. According to the novel direct-push storage type logging drilling tool adapter, the drilling tool adapter is connected with a drilling tool, the hanging short section is connected with a logging instrument string through the instrument adapter, and the drilling tool adapter and the hanging joint can freely rotate around the hanging short section after being fixed together, so that the logging instrument string is separated from rotation of the drilling tool; therefore, the logging instrument string is effectively protected, the drilling tool can be rotated when the drilling tool is stuck, and the stuck releasing success rate is increased.

Description

Technical Field

[0001] The invention belongs to the field of petroleum logging, and particularly relates to a novel direct-push storage logging drill tool adapter in the field, which is connected between the drill tool and the logging instrument string and can effectively protect the logging instrument string when the drill tool is rotated or the down pressure is overloaded. Background Art

[0002] With the increase in the number of horizontal wells, in order to solve the problem that cable logging cannot be lowered by gravity, direct push storage logging uses drilling tools and storage technology to achieve construction measurement of long horizontal wells. During logging, the logging instrument string is configured at the wellhead, and the upper end is connected to the drilling tool through an adapter. The drilling tool transports the logging instrument string to the target layer to complete the formation information measurement.

[0003] In complex well conditions, the drill string often needs to be rotated during transportation or drilling. If the torsion of the drill string is transmitted to the logging instrument string, it will cause torsional damage to the logging instrument string. However, the existing technology adapter cannot isolate the torque transmitted by the drill string. When the anti-rotation function of the logging instrument string fails, the rotation of the drill string drives the logging instrument string to rotate. When the well conditions are complex, the logging instrument string is easily damaged by torsion, which poses a construction safety risk. In addition, during the drilling and transportation process, since the adapter is rigidly connected to the logging instrument string, when the direct push construction encounters resistance, the downward pressure load increases instantly, and the driller does not have enough reaction time. If the downward pressure load exceeds the compressive limit of the logging instrument string, the logging instrument string will be bent or even broken and damaged, resulting in serious logging accidents such as falling into the well. Summary of the invention

[0004] The technical problem to be solved by the present invention is to effectively protect the logging instrument string and meet the safety requirements of direct-push storage logging construction in complex horizontal wells, and to provide a new direct-push storage logging drill tool adapter with the functions of isolating drill tool rotation, down pressure limit protection and mud circulation.

[0005] The present invention adopts the following technical solution:

[0006] A novel direct-push storage logging drill tool adapter, the improvement of which lies in that it comprises a drill tool adapter, a suspension joint, a suspension pup joint and an instrument adapter, the upper end of the drill tool adapter is used to connect the drill tool, and the lower end of the instrument adapter is used to connect the logging instrument string; the drill tool adapter and the suspension joint both have upper and lower openings and are provided with a cavity that passes through the upper and lower openings, the suspension pup joint is first inserted into the suspension joint, and then the lower end of the drill tool adapter is fixed to the upper end of the suspension joint, and the drill tool adapter and the suspension joint can rotate freely around the suspension pup joint after being fixed together, the lower end of the suspension pup joint can extend from the lower opening of the suspension joint, the upper end of the instrument adapter is fixedly connected to the lower end of the suspension pup joint, a step structure and a retaining ring are arranged on the outer wall of the suspension pup joint, the step structure cannot pass through the lower opening of the suspension joint, the retaining ring is located above the step structure, and is fixedly connected to the suspension pup joint through a shear pin, the shearing force of the shear pin is less than the compressive limit of the logging instrument string, and the retaining ring cannot pass through the lower opening of the drill tool adapter.

[0007] Furthermore, a closing structure is provided on the inner wall of the lower opening of the suspension joint so that the step structure on the outer wall of the suspension short section cannot pass through.

[0008] Furthermore, the suspension short section includes a lifting cap and a suspension core shaft connected together. When in use, the lifting cap is the upper end of the suspension short section, and the suspension core shaft is the lower end of the suspension short section. The step structure and the retaining ring are both located on the outer wall of the suspension core shaft, and a connector is arranged at the lower end of the suspension core shaft. The upper end of the instrument adapter is fixedly connected to the lower end of the suspension core shaft through the connector.

[0009] Furthermore, an O-ring is provided at the connection between the lifting cap and the suspension mandrel, and an O-ring is provided at the connection between the lower end of the suspension mandrel and the connector.

[0010] Furthermore, the distance between the step structure and the lower end of the hanging short section is not less than 1m.

[0011] Furthermore, after the shear pin is cut off, the retaining ring is separated from the suspension short section, and the suspension short section can extend from the lower opening of the drill tool adapter into the drill tool adapter by at least 0.5 m.

[0012] The beneficial effects of the present invention are:

[0013] The novel direct-push storage logging drill tool adapter disclosed in the present invention uses a drill tool adapter to connect the drill tool, and a suspension pup joint is connected to the logging instrument string through an instrument adapter. After the drill tool adapter and the suspension joint are fixed together, they can rotate freely around the suspension pup joint, thereby isolating the rotation of the logging instrument string from the drill tool, thereby effectively protecting the logging instrument string. When the drill tool is stuck, the drill tool can be rotated to improve the success rate of unsticking.

[0014] The novel direct-push storage logging drill tool adapter disclosed in the present invention uses the shear pin as a safety pin and has a downward pressure overload protection function. When the downward pressure is blocked during drilling, the downward pressure increases instantly. When the downward pressure exceeds the shear pin's cutting force, the shear pin is cut off, so that the retaining ring is separated from the suspension short section, releasing the downward pressure. The suspension short section can extend from the lower opening of the drilling tool adapter into the drilling tool adapter by at least 0.5m, thereby buffering the impact caused by the shear pin being cut off, leaving the driller with operational reaction time, and the shear pin's cutting force is less than the compression limit of the logging instrument string, which can effectively protect the logging instrument string and reduce the probability of damage to the logging instrument string when encountering obstacles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a novel direct-push storage-type logging drilling tool adapter disclosed in the present invention;

[0016] Figure 2 The invention discloses a structural schematic diagram of a suspension nipple in a novel direct-push storage-type logging drilling tool adapter.

[0017] Reference numerals:

[0018] 1—drill tool adapter, 2—suspension joint, 3—suspension short section, 4—instrument adapter, 21—lifting cap, 22—O-ring, 23—shear pin, 24—retaining ring, 25—suspension mandrel, 26—O-ring, 27—connector, 28—step structure. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In this embodiment, "upper" means Figure 1 The "left" in the figure refers to the direction of the drilling tool, and the "down" refers to Figure 1 The “right” in the figure refers to the direction of the logging instrument string.

[0021] Embodiment 1, this embodiment discloses a novel direct push storage logging drilling tool adapter, such as Figure 1As shown, it includes a drill tool adapter 1, a suspension joint 2, a suspension short section 3 and an instrument adapter 4. The upper end of the drill tool adapter is a common drill tool buckle type for connecting the drill tool, and the lower end of the instrument adapter is an instrument string standard interface for connecting the logging instrument string; the drill tool adapter and the suspension joint are both opened at the top and bottom and have a cavity running through the upper and lower openings. The suspension short section is first inserted into the suspension joint, and then the lower end of the drill tool adapter is fixed to the upper end of the suspension joint. After the drill tool adapter and the suspension joint are fixed together, they can rotate freely around the suspension short section, and the lower end of the suspension short section can extend from the lower opening of the suspension joint. The upper end of the instrument adapter is fixedly connected to the lower end of the suspension short section, as shown in FIG. Figure 2 As shown, a step structure 28 and a retaining ring 24 are provided on the outer wall of the suspension nipple, the step structure cannot pass through the lower opening of the suspension joint, and a closing structure is provided on the inner wall of the lower opening of the suspension joint so that the step structure on the outer wall of the suspension nipple cannot pass through. The retaining ring is located above the step structure and is fixedly connected to the suspension nipple through a shear pin 23. The shear pin is selected according to the pressure resistance of different logging instrument strings, but the shear pin's shearing force is required to be less than the pressure resistance limit of the logging instrument string, and the retaining ring cannot pass through the lower opening of the drilling tool adapter.

[0022] like Figure 2 As shown, the suspension nipple includes a lifting cap 21 and a suspension mandrel 25 connected together. When in use, the lifting cap is the upper end of the suspension nipple, which is used to lift the suspension nipple out of the suspension joint. The suspension mandrel is the lower end of the suspension nipple, and the step structure and the retaining ring are both located on the outer wall of the suspension mandrel, and a connector 27 is provided at the lower end of the suspension mandrel, and the upper end of the instrument adapter is fixedly connected to the lower end of the suspension mandrel through the connector. An O-ring 22 is provided at the connection between the lifting cap and the suspension mandrel, and an O-ring 26 is provided at the connection between the lower end of the suspension mandrel and the connector.

[0023] After the drill tool adapter of the novel direct-push storage logging drill tool adapter disclosed in this embodiment is connected to the drill tool, and the suspension nipple is connected to the logging instrument string through the instrument adapter, the drill tool adapter and the suspension joint can rotate freely around the suspension nipple (rotate through the shaft hole) after being fixed together, thereby isolating the rotation of the logging instrument string from the drill tool. The lower end of the suspension nipple can extend from the lower opening of the suspension joint, while the step structure on the outer wall of the suspension nipple cannot pass through the lower opening of the suspension joint, and the distance between the step structure and the lower end of the suspension nipple is not less than 1m (the distance in this embodiment is about 1m), thus leaving a movable distance of about 1m for the suspension nipple to extend from the lower opening of the suspension joint.

[0024] When the drill tool is stuck and needs to be rotated, first circulate the mud to circulate and discharge the impurities in the suspension joint to ensure that there is no debris such as rock chips in the cavity between the suspension pup joint and the suspension joint. First lift the drill tool to a safe tension, then unload and lower it 0.5m, so that the retaining ring on the outer wall of the suspension pup joint is in the middle position of the suspension joint cavity and is fully separated from the lower opening of the drill tool adapter, reducing the torque transmission to the retaining ring due to friction when the suspension joint rotates with the drill tool, ensuring that the logging instrument string will not rotate with the drill tool when the drill tool is rotated.

[0025] The shear pin is used as a safety pin, which has a downward pressure overload protection function. During the lowering of the drill bit in the horizontal section, the upper drill bit adapter applies downward pressure to the retaining ring of the suspension short section. When the drilling encounters resistance, the downward pressure increases instantly. When the downward pressure exceeds the shear pin's cutting force, the shear pin is cut off, so that the retaining ring is separated from the suspension short section, releasing the downward pressure. The suspension short section can extend from the lower opening of the drill bit adapter into the drill bit adapter (water eye) by at least 0.5m, thereby buffering the impact caused by the shear pin being cut off, leaving the driller with operational reaction time, and the shear pin's cutting force is less than the compression limit of the logging instrument string, which can effectively protect the logging instrument string and reduce the probability of damage to the logging instrument string when the direct push construction encounters resistance.

[0026] After the shear pin is cut off, the suspension pup joint is still limited in the suspension joint because the step structure on the outer wall of the suspension pup joint cannot pass through the lower opening of the suspension joint, ensuring that the logging instrument string does not fall into the well.

Claims

1. A new type of direct push storage logging drill tool adapter, characterized in that: It includes a drill tool adapter, a suspension joint, a suspension pup joint and an instrument adapter. The upper end of the drill tool adapter is used to connect the drill tool, and the lower end of the instrument adapter is used to connect the logging instrument string. The drill tool adapter and the suspension joint both have upper and lower openings and are provided with a cavity running through the upper and lower openings. The suspension pup joint is first inserted into the suspension joint, and then the lower end of the drill tool adapter is fixed to the upper end of the suspension joint. After the drill tool adapter and the suspension joint are fixed together, they can rotate freely around the suspension pup joint, and the lower end of the suspension pup joint can extend from the lower opening of the suspension joint. The upper end of the instrument adapter is fixedly connected to the lower end of the suspension pup joint. A step structure and a retaining ring are arranged on the outer wall of the suspension pup joint. The step structure cannot pass through the lower opening of the suspension joint. The retaining ring is located above the step structure and is fixedly connected to the suspension pup joint through a shear pin. The shearing force of the shear pin is less than the compressive limit of the logging instrument string, and the retaining ring cannot pass through the lower opening of the drill tool adapter.

2. According to the novel direct push storage logging drilling tool adapter of claim 1, it is characterized by: A closing structure is arranged on the inner wall of the lower opening of the suspension joint so that the step structure on the outer wall of the suspension short section cannot pass through.

3. According to the novel direct push storage logging drilling tool adapter of claim 1, it is characterized by: The suspension short section includes a lifting cap and a suspension core shaft connected together. When in use, the lifting cap is the upper end of the suspension short section, and the suspension core shaft is the lower end of the suspension short section. The step structure and the retaining ring are both located on the outer wall of the suspension core shaft, and a connector is provided at the lower end of the suspension core shaft. The upper end of the instrument adapter is fixedly connected to the lower end of the suspension core shaft through the connector.

4. According to the novel direct push storage logging drilling tool adapter of claim 3, it is characterized by: An O-ring is arranged at the connection between the lifting cap and the suspension core shaft, and an O-ring is arranged at the connection between the lower end of the suspension core shaft and the connector.

5. According to the novel direct push storage logging drilling tool adapter of claim 1, it is characterized by: The distance between the step structure and the lower end of the hanging short section shall be no less than 1m.

6. According to claim 1, the novel direct-push storage logging drilling tool adapter is characterized in that: After the shear pin is cut off, the retaining ring is separated from the suspension short section, and the suspension short section can extend from the lower opening of the drill tool adapter into the drill tool adapter for at least 0.5m.

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