Well leakage point measuring nipple

Abstract

The utility model discloses a measuring nipple for a leakage point while drilling, which relates to the technical field of petroleum drilling tools and comprises a main body unit, an inner pipe unit, a processing unit, a measuring unit and a clamping unit. The alpha data receiving block is arranged in the inner pipe unit and used for detecting a leakage point, and the clamping unit comprises a fixing frame fixedly connected to the two sides of one end of the inner pipe unit and a positioning clamping column movably arranged in one side of the fixing frame and used for positioning, clamping and fixing. According to the measuring nipple for the leakage point of the well while drilling, leakage stopping measures can be carried out timely and accurately, a leakage stopping agent can be selected timely and accurately, a measuring structure can be integrally installed through the pipe body single arrangement of the built-in middle pipe, the structural design is reasonable, simple and easy to operate, the built-in middle pipe can be positioned and fixed, and dismounting and mounting are convenient and fast; and the internal structure can be conveniently maintained or replaced in time.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling tools, in particular to a short joint for measuring the leakage point of lost circulation during drilling. Background Technique

[0002] With the gradual development of oil and gas drilling from shallow wells to deep wells and ultra-deep wells, the encountered formations have also changed from simple formations to complex formations, so complex situations such as lost circulation often occur. At the same time, lost circulation is also a very serious complex situation faced during the oil and gas drilling and completion process. The occurrence of lost circulation will not only lead to the loss of a large amount of drilling fluid, increasing the drilling cost, but serious lost circulation will cause inefficient drilling. When other complex situations are induced, it may even lead to the inability to continue drilling, and it is necessary to fill the well and drill again. At the same time, the lost drilling fluid entering the formation will also pollute the formation such as the reservoir or groundwater, thereby causing damage to the formation or reservoir. At present, lost circulation is still one of the most serious complex situations faced during drilling, and it is also one of the major problems restricting efficient drilling. At present, there is no good preventive measure for the problem of lost circulation. The measures taken are all after-the-fact measures, that is, after the occurrence of lost circulation, the leakage point position is calculated through the wellhead pressure, and at the same time, the fracture pore size is estimated according to the leakage rate, so as to select different plugging materials for plugging operations.

[0003] Publication (Announcement) Number: CN212272167U discloses a short joint for predicting lost circulation during drilling and measuring the leakage point, which effectively solves the problems that lost circulation during drilling operations cannot be predicted in advance and cannot be plugged efficiently after the occurrence of lost circulation; it is designed with an α sensor that can measure the lithology of the drilled formation while drilling, and then judge the fracture and cave development characteristics of the drilled rock formation, evaluate the possible lost circulation formation and the geological and engineering factors inducing lost circulation; the designed pressure and temperature sensor can measure the parameters such as the lithology characteristics, pressure, and temperature underground in a timely and accurate manner when lost circulation occurs and transmit them to the ground in real time, which plays an important guiding role in taking efficient plugging measures in a timely manner.

[0004] In the above patent, although the leakage point of lost circulation during drilling can be measured, its internal structure is a single structure connected by mutual sealing. This connection method is complex and unstable, and it cannot be assembled and disassembled as a whole. It is more troublesome to use, time-consuming and laborious. Therefore, it is necessary to provide a short joint for measuring the leakage point of lost circulation during drilling. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a short joint for measuring the leakage point of lost circulation during drilling, which can effectively solve the problem that in the background technique, its internal structure is a single structure connected by mutual sealing, this connection method is complex and unstable, and it cannot be assembled and disassembled as a whole. It is more troublesome to use, time-consuming and laborious.

[0006] To achieve the above object, the technical solution adopted by the utility model is as follows: A measurement sub-section for measuring the leakage point during drilling, including a main body unit, an inner tube unit arranged inside the main body unit, and a processing unit arranged inside the inner tube unit, further including a measurement unit arranged between the inner tube unit and the main body unit and a clamping unit arranged on both sides at one end of the inner tube unit;

[0007] The measurement unit includes a pressure and temperature sensor arranged inside the inner tube unit and an α data receiving block arranged inside the inner tube unit for detecting the leakage point;

[0008] The clamping unit includes a fixed frame fixedly connected to both sides at one end of the inner tube unit and a positioning clamping column movably arranged inside one side of the fixed frame for positioning and clamping.

[0009] Preferably, the main body unit includes a sub-section and positioning clamping holes opened on both sides of the sub-section.

[0010] Preferably, the inner tube unit includes a built-in middle tube installed inside the sub-section, a limiting block a fixedly connected to the outer surface of the built-in middle tube, and a limiting block b fixedly connected to the outer surface of the built-in middle tube and located below the limiting block a.

[0011] Preferably, the processing unit includes a battery compartment installed inside the built-in middle tube, a data processing assembly arranged inside the built-in middle tube and on one side of the battery compartment, and a positive pulse generator installed inside one end of the built-in middle tube.

[0012] Preferably, the measurement unit further includes an external fixing bolt passing through the sub-section and threadedly connected to the limiting block b, an α sensor installed inside the external fixing bolt, an internal fixing bolt threadedly connected inside the external fixing bolt, a pressure guiding bolt passing through the sub-section and threadedly connected to the limiting block a, and a wire connecting the α sensor and the α data receiving block.

[0013] Preferably, the clamping unit further includes a limiting plate fixedly connected to one end of the positioning clamping column, a reset spring fixedly connected to one side of the limiting plate, and a plugging block arranged inside one side of the positioning clamping hole.

[0014] Preferably, the α sensor is installed between the external fixing bolt and the internal fixing bolt, and the α sensor, the α data receiving block and the pressure and temperature sensor are all electrically connected to the battery compartment;

[0015] One end of the positioning clamping column is in an arc-shaped structure, the outer diameter dimension of the positioning clamping column is smaller than the inner diameter dimension of the positioning clamping hole, the outer diameter dimension of the plugging block is adapted to the inner diameter dimension of the positioning clamping hole, and the reset spring is fixedly connected between the limiting plate and the inner wall of the fixed frame.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. In the utility model, by connecting the short section to the drill string and lowering it into the wellbore with the drill string, parameters such as formation lithology, temperature, and pressure are measured during the drilling process. The α sensor can measure the lithology of the drilled formation while drilling, thereby judging the fracture and cave development characteristics of the drilled rock formation, evaluating possible lost circulation formations, and geological and engineering factors inducing well leakage. The pressure and temperature sensor can timely measure parameters such as pressure and temperature at the well depth where leakage occurs when leakage occurs, and upload the measured data to the ground through the positive pulse generator, so as to carry out plugging measures and select plugging agents in a timely and accurate manner. The setting of the pipe body monomer with an internal middle pipe can install the measurement structure as a whole, avoiding the problem of troublesome disassembly and assembly, time-consuming and laborious.

[0018] 2. In the utility model, by inserting the internal middle pipe into the short section through the limiting block a and the limiting block b, due to the limiting effect of the limiting block a and the limiting block b, the internal middle pipe is located at the axis of the short section. Due to the penetration of the internal middle pipe and the inner width and outer narrow setting at one end of the short section, the positioning clamping column enters the inside of the fixed frame under the friction extrusion of the arc, and the return spring is compressed through the limiting plate until the positioning clamping column and the positioning clamping hole are at the same horizontal plane. At this time, the return spring loses the acting force and elastically restores to make the positioning clamping column pop out and enter the inside of the positioning clamping hole. Then, the positioning clamping hole is blocked by the blocking block, and the positioning installation of the internal middle pipe is completed. On the contrary, when disassembling, remove the blocking block, insert a columnar rod body into the inside of the positioning clamping hole, and squeeze the positioning clamping column to remove the internal middle pipe from the inside of the short section. The structure is reasonably designed, simple and easy to operate, can position and fix the internal middle pipe, is convenient and fast for disassembly and assembly, and is convenient for timely maintenance or replacement of the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic cross-sectional internal structure diagram of the utility model;

[0020] Figure 2 is the utility model Figure 1 the enlarged structure diagram at A in;

[0021] Figure 3 is the utility model Figure 1 the enlarged structure diagram at B in;

[0022] Figure 4 is the utility model Figure 1 the enlarged structure diagram at C in.

[0023] In the figure:

[0024] 100, main body unit; 101, short section; 102, positioning clamping hole;

[0025] 200. Inner tube unit; 201. Built-in middle tube; 202. Limiting block a; 203. Limiting block b;

[0026] 300. Processing unit; 301. Positive pulse generator; 302. Data processing assembly; 303. Battery compartment;

[0027] 400. Measuring unit; 401. Pressure and temperature sensor; 402. Alpha data receiving block; 403. Outer fixing bolt; 404. Alpha sensor; 405. Inner fixing bolt; 406. Pressure guiding bolt; 407. Wire;

[0028] 500. Clamping unit; 501. Fixing frame; 502. Positioning clamping post; 503. Limiting plate; 504. Return spring; 505. Sealing block. Detailed implementation mode

[0029] Embodiment 1

[0030] Please refer to Figure 1 — Figure 4 As shown in the figure, the utility model relates to a short joint for measuring the leakage point during drilling, which includes a main body unit 100, an inner tube unit 200 arranged inside the main body unit 100, a processing unit 300 arranged inside the inner tube unit 200, a measuring unit 400 arranged between the inner tube unit 200 and the main body unit 100, and a clamping unit 500 arranged on both sides of one end of the inner tube unit 200;

[0031] The clamping unit 500 includes a fixing frame 501 fixedly connected to both sides of one end of the inner tube unit 200, and a positioning clamping post 502 movably arranged inside one side of the fixing frame 501 for positioning and clamping.

[0032] As Figure 1 — Figure 4 As shown in the figure, the main body unit 100 includes a short joint 101 and positioning clamping holes 102 opened on both sides of the short joint 101. The short joint 101 is connected to the drill tool and is lowered into the wellbore with the drill tool to measure parameters such as formation lithology, temperature and pressure during drilling. The positioning clamping holes 102 opened on both sides of it are used for positioning and clamping the built-in middle tube 201.

[0033] As Figure 1 — Figure 4 As shown in the figure, the inner tube unit 200 includes a built-in middle tube 201 installed inside the short joint 101, a limiting block a 202 fixedly connected to the outer surface of the built-in middle tube 201, and a limiting block b 203 fixedly connected to the outer surface of the built-in middle tube 201 and located below the limiting block a 202. The limiting block a 202 and the limiting block b 203 are adapted to the internal dimensions of the short joint 101. The tube body of the built-in middle tube 201 is set as a single body, which can integrally install the measuring structure and avoid the problems of troublesome disassembly and assembly and time-consuming and laborious work.

[0034] As Figure 1 shown, the processing unit 300 includes a battery compartment 303 installed inside the built-in middle tube 201, a data processing assembly 302 arranged inside the built-in middle tube 201 and on one side of the battery compartment 303, and a positive pulse generator 301 installed inside one end of the built-in middle tube 201. The battery compartment 303 supplies electrical energy to each unit inside the nipple 101. The received data is processed by the data processing assembly 302, and the processed data is transmitted to the ground through the positive pulse generator 301, so as to carry out plugging measures and select plugging agents in a timely and accurate manner.

[0035] As Figure 1 — Figure 3 shown, the measuring unit 400 includes a pressure and temperature sensor 401 arranged inside the inner pipe unit 200, and an alpha data receiving block 402 arranged inside the inner pipe unit 200 for detecting leak points. The measuring unit 400 further includes an external fixing bolt 403 passing through the nipple 101 and threadedly connected to the fixing block b203, an alpha sensor 404 installed inside the external fixing bolt 403, an internal fixing bolt 405 threadedly connected inside the external fixing bolt 403, a pressure guiding bolt 406 passing through the nipple 101 and threadedly connected to the fixing block a202, and a wire 407 connecting the alpha sensor 404 and the alpha data receiving block 402. The alpha sensor 404 is installed between the external fixing bolt 403 and the internal fixing bolt 405. The alpha sensor 404, the alpha data receiving block 402, and the pressure and temperature sensor 401 are all electrically connected to the battery compartment 303.

[0036] Working principle: During oil drilling operations, the nipple 101 is connected to the drill string and lowered into the wellbore with the drill string. During drilling, parameters such as formation lithology, temperature, and pressure are measured. The alpha sensor 404 can measure the lithology of the drilled formation while drilling, thereby judging the development characteristics of fractures and cavities in the drilled rock formation, evaluating possible lost circulation formations, and geological and engineering factors inducing well leakage. The pressure and temperature sensor 401 can timely measure parameters such as pressure and temperature at the well depth where leakage occurs when leakage occurs, and upload the measured data to the ground through the positive pulse generator 301, so as to carry out plugging measures and select plugging agents in a timely and accurate manner.

[0037] Embodiment 2

[0038] Please refer to Figure 1 — Figure 4As shown in the figure, the utility model is a measurement sub-section for measuring the leakage point during drilling, including a main body unit 100, an inner tube unit 200 arranged inside the main body unit 100, a processing unit 300 arranged inside the inner tube unit 200, a measurement unit 400 arranged between the inner tube unit 200 and the main body unit 100, and a clamping unit 500 arranged on both sides of one end of the inner tube unit 200;

[0039] The measurement unit 400 includes a pressure and temperature sensor 401 arranged inside the inner tube unit 200, and an α data receiving block 402 arranged inside the inner tube unit 200 for detecting the leakage point.

[0040] As Figure 1 — Figure 4 As shown in the figure, the main body unit 100 includes a sub-section 101, and positioning clamping holes 102 opened on both sides of the sub-section 101. The sub-section 101 is connected to the drill tool and lowered into the wellbore with the drill tool to measure parameters such as formation lithology, temperature, and pressure during drilling. The positioning clamping holes 102 opened on both sides are used for positioning and clamping the built-in middle tube 201.

[0041] As Figure 1 — Figure 4 As shown in the figure, the inner tube unit 200 includes a built-in middle tube 201 installed inside the sub-section 101, a limiting block a 202 fixedly connected to the outer surface of the built-in middle tube 201, and a limiting block b 203 fixedly connected to the outer surface of the built-in middle tube 201 and located below the limiting block a 202. The limiting block a 202 and the limiting block b 203 are adapted to the internal dimensions of the sub-section 101. The tube body of the built-in middle tube 201 is set as a single unit, which can install the measurement structure as a whole and avoid the problems of troublesome disassembly and assembly, time-consuming and laborious.

[0042] As Figure 1 As shown in the figure, the processing unit 300 includes a battery compartment 303 installed inside the built-in middle tube 201, a data processing assembly 302 arranged inside the built-in middle tube 201 and on one side of the battery compartment 303, and a positive pulse generator 301 installed inside one end of the built-in middle tube 201. The battery compartment 303 provides electrical energy for each unit inside the sub-section 101. The received data is processed by the data processing assembly 302, and the processed data is transmitted to the ground through the positive pulse generator 301 to carry out plugging measures and select plugging agents in a timely and accurate manner.

[0043] As Figure 1 And Figure 4As shown in the figure, the clamping unit 500 includes fixing frames 501 fixedly connected to both sides of one end of the inner pipe unit 200, and positioning clamping posts 502 movably arranged inside one side of the fixing frames 501 for positioning and clamping. The clamping unit 500 further includes a limiting plate 503 fixedly connected to one end of the positioning clamping post 502, a return spring 504 fixedly connected to one side of the limiting plate 503, and a blocking block 505 arranged inside one side of the positioning card hole 102. One end of the positioning clamping post 502 is an arc-shaped structure. The outer diameter of the positioning clamping post 502 is smaller than the inner diameter of the positioning card hole 102. The outer diameter of the blocking block 505 is adapted to the inner diameter of the positioning card hole 102. The return spring 504 is fixedly connected between the limiting plate 503 and the inner wall of the fixing frame 501.

[0044] Working principle: Through the setting of the built-in middle pipe 201, when the built-in middle pipe 201 is installed, the built-in middle pipe 201 is inserted into the inside of the short section 101 through the limiting block a 202 and the limiting block b 203. Due to the limiting effect of the limiting block a 202 and the limiting block b 203, the built-in middle pipe 201 is located at the axis of the short section 101. Due to the penetration of the built-in middle pipe 201 and the outer-wide and inner-narrow setting of the inside of one end of the short section 101, the positioning clamping post 502 enters the inside of the fixing frame 501 under the friction extrusion of the arc, and the return spring 504 is compressed by the limiting plate 503 until the positioning clamping post 502 and the positioning card hole 102 are at the same horizontal plane. At this time, the return spring 504 loses the acting force and elastically restores to make the positioning clamping post 502 pop out and enter the inside of the positioning card hole 102. Then, the positioning card hole 102 is blocked by the blocking block 505, and the positioning installation of the built-in middle pipe 201 is completed. On the contrary, when disassembling, the blocking block 505 is removed, and a columnar rod is inserted into the inside of the positioning card hole 102, and the positioning clamping post 502 is squeezed to remove the built-in middle pipe 201 from the inside of the short section 101. This structure is reasonably designed, simple and easy to operate, can position and fix the built-in middle pipe 201, is convenient and fast to disassemble and assemble, and is convenient for timely maintenance or replacement of the internal structure.

Claims

1. A measurement sub for lost circulation point during drilling, comprising a main body unit (100), an inner tube unit (200) disposed inside the main body unit (100), and a processing unit (300) disposed inside the inner tube unit (200), characterized in that, It further includes a measuring unit (400) disposed between the inner tube unit (200) and the main body unit (100), and clamping units (500) disposed on both sides at one end of the inner tube unit (200); The measuring unit (400) includes a pressure and temperature sensor (401) disposed inside the inner tube unit (200), and an α data receiving block (402) disposed inside the inner tube unit (200) for detecting leak points; The clamping unit (500) includes a fixed frame (501) fixedly connected to both sides at one end of the inner tube unit (200), and a positioning clamping post (502) movably disposed inside one side of the fixed frame (501) for positioning and clamping; 2. The leak point measuring sub-joint for measuring the lost circulation during drilling according to claim 1, characterized in that: The main body unit (100) includes a nipple (101), and positioning card holes (102) opened on both sides of the nipple (101); 3. A short sub for measuring the leakage point of lost circulation during drilling, according to claim 2, characterized in that: The inner tube unit (200) includes a built-in middle tube (201) installed inside the nipple (101), a limiting block a (202) fixedly connected to the outer surface of the built-in middle tube (201), and a limiting block b (203) fixedly connected to the outer surface of the built-in middle tube (l01) and located below the limiting block a (202); 4. A short section for measuring the leakage point of lost circulation during drilling, according to claim 3, characterized in that: The processing unit (300) includes a battery compartment (303) installed inside the built-in middle tube (201), a data processing assembly (302) disposed inside the built-in middle tube (201) and on one side of the battery compartment (303), and a positive pulse generator (301) installed inside one end of the built-in middle tube (201); 5. A short sub for measuring the leakage point of lost circulation during drilling, as claimed in claim 4, wherein: The measuring unit (400) further includes an outer fixing bolt (403) passing through the nipple (101) and threadedly connected to the limiting block b (203), an α sensor (404) installed inside the outer fixing bolt (403), an inner fixing bolt (405) threadedly connected inside the outer fixing bolt (403), a pressure guiding bolt (406) passing through the nipple (101) and threadedly connected to the limiting block a (202), and a wire (407) connecting the α sensor (404) and the α data receiving block (402); 6. A short sub for measuring the leakage point of lost circulation during drilling, according to claim 5, characterized in that: The clamping unit (500) further includes a limiting plate (503) fixedly connected to one end of the positioning clamping post (502), a return spring (504) fixedly connected to one side of the limiting plate (503), and a blocking block (505) disposed inside one side of the positioning card hole (102); 7. A short sub for measuring the leakage point of lost circulation during drilling, according to claim 6, characterized in that: The α sensor (404) is installed between the outer fixing bolt (403) and the inner fixing bolt (405), and the α sensor (404), the α data receiving block (402), and the pressure and temperature sensor (401) are all electrically connected to the battery compartment (303); One end of the positioning clamping post (502) has an arc-shaped structure. The outer diameter dimension of the positioning clamping post (502) is smaller than the inner diameter dimension of the positioning card hole (102). The outer diameter dimension of the blocking block (505) is adapted to the inner diameter dimension of the positioning card hole (102). The return spring (504) is fixedly connected between the limiting plate (503) and the inner wall of the fixed frame (501).

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