Drift diameter gauge capable of being thrown and fished

Abstract

The utility model discloses a drifting and fishing type drift diameter gauge which comprises a guide cone top, a drifting and fishing centralizing head, a drifting and fishing locking table, a drifting and fishing reducing device, a reinforcing column and a drift diameter column which are sequentially connected from top to bottom, and a balance hole is formed in the upper portion of the drift diameter column. The utility model has the advantages of simple and reliable structure, difficult deformation, and low risk of falling into the well, and the underground jamming can be salvaged and recovered after falling off.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield downhole operation technical field more particularly, it is related to a kind of fishing formula gauge. BACKGROUND

[0002] In the oilfield development process, it is usually necessary to use gauge to carry out well-through operation, that is, to check whether the inner diameter of casing or tubing in production well changes through gauge, and to replace the casing or tubing with changed inner diameter in time according to the inspection result, so as to improve the success rate of subsequent downhole operation. However, when the casing or tubing is located in the inclined well section of the production well, or the gauge enters the casing or tubing at a faster running speed, the gauge may be stuck in the casing or tubing with changed inner diameter.

[0003] In order to deal with the jam, the conventional gauge includes two parts of an upper threaded connector and a gauge body, the upper connector thread is connected with the running tool string, the lower part of the upper connector is integrally connected with the body, the body adopts a hollow structure, and the wall thickness of the hollow area is relatively thin. When the jam occurs and the upper gauge is pulled up, the thin-walled part will deform along the jam stress area, so that it can be pulled out of the pipe more easily.

[0004] However, when the inner diameter of the casing or tubing changes greatly, and the gauge is jammed tightly, the upper gauge may not be able to pull the gauge out of the pipe, and if it is pulled up forcibly, the gauge may even fall into the production well together with the tool string, causing a large drop accident and difficult fishing. UTILITY MODEL CONTENTS

[0005] In order to overcome the deficiencies in the prior art and solve the problem of forcibly pulling up the gauge, which leads to the gauge falling into the production well, the utility model provides a fishing formula gauge.

[0006] The purpose of the utility model is achieved by the following technical solutions.

[0007] A fishing formula gauge includes a guide cone top, a fishing centralizer head, a fishing locking platform, a fishing shrinkage, a reinforcing column and a gauge column connected in sequence from top to bottom.

[0008] Further, the guide cone top, the fishing centralizer head, the fishing locking platform, the fishing shrinkage, the reinforcing column and the gauge column are arranged along the same axis and adopt a solid one-piece structure.

[0009] Further, the cone angle of the guide cone top is 75 to 120 degrees.

[0010] Further, the fishing centralizer head is provided as a cylindrical body, the length of which is at least 10 mm, and the diameter thereof matches the opening degree of the fishing tool to be connected.

[0011] Further, the fishing locking platform is provided as a cylinder with a diameter 1mm smaller than the diameter of the fishing stabilizing head.

[0012] Further, the fishing diameter reducer is provided as a cylinder with a diameter 5mm smaller than the diameter of the fishing stabilizing head.

[0013] Further, the reinforcing column is composed of an upper circular platform segment and a lower cylindrical segment, the upper end face of the circular platform segment has a diameter equal to the diameter of the fishing diameter reducer, the lower end face of the circular platform segment has a diameter equal to the diameter of the cylindrical segment, and the diameter of the cylindrical segment is the same as the diameter of the fishing stabilizing head.

[0014] Further, the drift diameter column has an outer diameter matching the inner diameter of the measured oil pipe.

[0015] Further, the balance hole is transversely provided along the diameter line of the drift diameter column.

[0016] Compared with the prior art, the technical scheme of the utility model brings the following beneficial effects:

[0017] (1) The utility model adopts a solid one-piece structure, has a simple and reliable structure, is not easy to deform, and can be fished and recovered after falling off in the well, thus having low risk of falling into the well.

[0018] (2) In the utility model, the guide cone top allows smooth connection of the downhole fishing tool, the fishing stabilizing head allows the downhole fishing tool to be guided and then lowered after being stabilized, the fishing locking platform provides a locking step for fixed connection of the fishing tool and the drift gauge, the fishing diameter reducer establishes a diameter difference with the fishing locking platform, and provides an operation space for lowering and lifting of the fishing tool, the reinforcing column provides a transition reinforcement for the fishing diameter reducer to the drift diameter column, and provides support for downward jarring of the fishing tool, the outer diameter of the drift diameter column matches the inner diameter of the measured oil pipe, the passability of the inner diameter of the oil pipe is detected, and the wax, rust, scale and rock debris in the oil pipe can also be scraped off, the balance hole is transversely provided along the diameter line of the drift diameter column, and the function is to balance pressure and reduce resistance, and to ensure the passability of the drift gauge in the well.

[0019] (3) When the utility model is connected with the RB fishing tool, the lower part of the RB fishing tool contacts the guide cone top, forcing the RB fishing tool to gradually open the claws, move to the fishing stabilizing head, and completely open the claws, and then extend beyond the fishing locking platform to the fishing diameter reducer, and the spring of the RB fishing tool makes the claws retract and grab, and is clamped with the bottom of the fishing locking platform, and then grabs the drift gauge, so that the RB fishing tool and the drift gauge are connected; when the drift gauge is blocked and cannot be pulled out, the RB fishing tool is jolted upward to be released, and then the SB fishing tool is used to fish and recover the drift gauge according to the above method. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the utility model.

[0021] Figure 2 is the lateral view of the fishing type gauge.

[0022] Figure 3 is the perspective view of the fishing type gauge.

[0023] Figure 4 is the connection schematic view of the fishing type gauge and the RB fishing tool.

[0024] Figure 5 is the connection schematic view of the fishing type gauge and the SB fishing tool.

[0025] Reference signs: 1-cone top; 2-fishing head; 3-fishing locking platform; 4-fishing diameter reduction;

[0026] 5-strengthening column; 6-gauge column; 7-balance hole. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings.

[0028] The utility model discloses a fishing type gauge, which is of an overall structure design and can be made of high-hardness and wear-resistant steel. Figures 1 to 3 As shown in the drawings, the fishing type gauge mainly comprises a cone top 1, a fishing head 2, a fishing locking platform 3, a fishing diameter reduction 4, a strengthening column 5 and a gauge column 6 connected in sequence from top to bottom.

[0029] The cone top 1 is used to smoothly guide the connection of the downhole fishing tool, and the cone angle can be 75 to 120 degrees, preferably 90 degrees.

[0030] The fishing head 2 is used to support and lower the downhole fishing tool after being guided, and can be a cylindrical body with a length of at least 10 mm and a diameter matched with the opening degree of the fishing tool to be connected.

[0031] The fishing locking platform 3 is used to provide a locking step for the fixed connection of the fishing tool and the gauge, and can be a cylindrical body with a diameter 1 mm smaller than that of the fishing head 2.

[0032] The fishing diameter reduction 4 is used to establish a diameter difference with the fishing locking platform and provide an operation space for the lowering and lifting of the fishing tool, and can be a cylindrical body with a diameter 5 mm smaller than that of the fishing head 2.

[0033] The reinforcing column 5 consists of an upper frustum section and a lower cylindrical section. The diameter of the upper end face of the frustum section is equal to the diameter of the retrieval reduction diameter 4, and the diameter of the lower end face of the frustum section is equal to the diameter of the cylindrical section. The diameter of the cylindrical section is the same as the diameter of the retrieval centering head 2. The function of the reinforcing column 5 is to provide transition reinforcement for the transition from the retrieval reduction diameter 4 to the through diameter column 6, and at the same time to provide support for the downward impact of the retrieval tool.

[0034] The outer diameter of the guide column 6 matches the inner diameter of the oil pipe being tested, which detects the passability of the oil pipe's inner diameter and can also scrape off wax, rust, and rock debris from the oil pipe.

[0035] The balance hole 7 is located in the upper region of the gauge post and is opened laterally along the diameter line of the gauge post 6. Its function is to balance pressure and reduce drag, so as to ensure the passage of the gauge downhole.

[0036] The operation process of this drop-and-retrieve gauge for downhole caliper testing:

[0037] like Figure 4 As shown, the upper part of the RB casting tool is connected to the tool string. The lower part of the RB casting tool contacts the top of the guide cone 1, forcing the claws of the casting tool to gradually open. When it moves to the casting and straightening head 2, the claws are fully open. After passing the casting locking platform 3 and extending to the casting reduction diameter 4, the spring of the RB casting tool causes the claws to retract and grip, engaging with the bottom of the casting locking platform 3, and then gripping the gauge, thus completing the connection between the RB casting tool and the gauge. Figure 4 As shown, the tool string performs bore inspection through bore post 6 according to normal bore process requirements.

[0038] When the gauge becomes stuck and cannot be removed by lifting, vibrate upwards to release the RB retrieval tool, then lift the tool string. Replace the RB retrieval tool with the SB retrieval tool. Figure 5 As shown, as the tool string is lowered into the well, when the SB retrieval tool contacts the guide cone 1 of the retrieval gauge of this utility model, it forces the SB retrieval tool's claws to gradually open. Moving to the retrieval centering head 2, the claws fully open, extending past the retrieval locking platform 3 to the retrieval reduction diameter 4. The spring of the SB retrieval tool then retracts the claws, engaging with the bottom of the retrieval locking platform 3, thereby gripping the gauge and completing the connection between the SB retrieval tool and the gauge. Figure 5 As shown. Vibrate upwards to release the jammed gauge from its jammed position.

[0039] Example

[0040] The whole body of the fishing type gauge adopts 3Cr13 stainless steel material; the guide cone top 1 has a 90-degree angle, which can make the connection of the downhole fishing tool smooth and lead in; the fishing centralizing head 2 has a length of 10mm and a diameter of 35mm, which can make the downhole fishing tool centralize and drop after leading in; the fishing locking platform 3 has a length of 5mm and a diameter of 34mm, which provides a locking step for the fixed connection of the fishing tool and the gauge; the fishing reducing diameter 4 has a length of 50mm and a diameter of 30mm, which establishes a diameter difference with the fishing locking platform and provides an operation space for the downhole fishing tool; the reinforcing column 5 has a length of 29mm and a diameter of 35mm, which provides a transition and reinforcement for the fishing reducing diameter to the gauge column and provides support for the downhole fishing tool; the gauge column 6 has a length of 50mm and a diameter of 46mm, which is suitable for 2-7 / 8" oil pipe and detects the passability of the oil pipe, and can also scrape off the wax, rust and dirt in the oil pipe; the balance hole 7 has a diameter of 10mm, which can balance the pressure and reduce the resistance and ensure the passability of the gauge in the downhole.

[0041] Although the function and working process of the utility model are described above in combination with the drawings, the utility model is not limited to the specific function and working process described above, and the specific implementation manner described above is only illustrative but not restrictive, and the person skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, which all belong to the protection of the utility model.

Claims

1. A retrievable gauging gauge, characterized in that, It includes a guide cone top (1), a retrieval and straightening head (2), a retrieval locking platform (3), a retrieval diameter reduction (4), a reinforcing column (5), and a through-diameter column (6) connected in sequence from top to bottom. The through-diameter column (6) has a balance hole (7) on its upper part.

2. The retrievable gauge according to claim 1, characterized in that, The guide cone top (1), the retrieval and straightening head (2), the retrieval locking platform (3), the retrieval diameter reduction (4), the reinforcing column (5), and the through column (6) are arranged along the same axis and adopt a solid integrated structure.

3. The retrievable gauge according to claim 1, characterized in that, The cone angle of the guide cone apex (1) is 75 to 120 degrees.

4. The retrievable gauge according to claim 1, characterized in that, The retrieval and straightening head (2) is set as a cylinder with a length of at least 10 mm and a diameter that matches the opening degree of the retrieval tool to be connected.

5. The retrievable gauge according to claim 1, characterized in that, The launching and locking platform (3) is set as a cylinder, and its diameter is 1 mm smaller than that of the launching and straightening head (2).

6. The retrievable gauge according to claim 1, characterized in that, The retrieval reducer (4) is set as a cylinder, and its diameter is 5mm smaller than that of the retrieval centering head (2).

7. The retrievable gauge according to claim 1, characterized in that, The reinforcing column (5) consists of an upper frustum section and a lower cylindrical section. The diameter of the upper end face of the frustum section is equal to the diameter of the retrieval reduction diameter (4), and the diameter of the lower end face of the frustum section is equal to the diameter of the cylindrical section. The diameter of the cylindrical section is the same as the diameter of the retrieval centering head (2).

8. The retrievable gauge according to claim 1, characterized in that, The outer diameter of the bore gauge (6) matches the inner diameter of the oil pipe being tested.

9. The retrievable gauge according to claim 1, characterized in that, The balance hole (7) is opened laterally along the diameter line of the bore column (6).

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