CN220378260U - Logging instrument for oil and gas exploration - Google Patents

Abstract

The utility model discloses an oil and gas exploration logging instrument which comprises an upper main body, a lower main body and a pushing part connected with the upper main body and the lower main body, wherein the pushing part is positioned between the upper main body and the lower main body and comprises a pushing system and a backup plate, the pushing system can push the backup plate to be abutted against a well wall, a sliding ball is arranged in the backup plate and protrudes out of the outer surface of the backup plate, and the sliding ball can freely roll around the axis of the sliding ball. By adopting the logging instrument, the pushing system pushes the backup plate to be abutted against the well wall, and at the moment, the sliding ball protrudes out of the outer surface of the backup plate and can freely roll around the axis of the sliding ball, so that the sliding ball can help the backup plate to move more easily through the rotation of the sliding ball when the backup plate rubs against the well wall.

Description

Logging instrument for oil and gas exploration

Technical Field

The utility model relates to the technical field of logging instruments, in particular to an oil and gas exploration logging instrument.

Background

The oil gas exploration logging instrument is mainly a natural gamma logging instrument, wherein the natural gamma logging instrument is a logging instrument for measuring the content of radioactive elements in a stratum, the elements comprise potassium, uranium, thorium and the like, the content of the elements is associated with the existence of an oil gas reservoir to a certain extent, and the structure and the property of the stratum can be determined by analyzing the content of the radioactive elements with different depths, so that the content of the oil gas in the stratum is known, and the exploration operation is completed.

In the existing logging instrument, when the backup plate is in contact with the inner wall of the exploratory well with a larger slope, the backup plate can be pressed by the inclined well wall along with the increase of the slope of the inner wall of the exploratory well, the friction force between the backup plate and the well wall is increased, and in the well wall with a larger slope, the backup plate can be clamped on a path in the well with a larger slope along with the downward movement or upward movement of the logging instrument body, so that the movement of the logging instrument is influenced.

Disclosure of Invention

The utility model aims to solve the problem that a backup plate in the existing logging instrument is easy to be clamped in a well wall with a large bending slope, and provides an oil and gas exploration logging instrument.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides an oil gas exploration logging instrument, includes upper portion main part, lower part main part and connects the upper portion main part with the pushing part of lower part main part, pushing part is located upper portion main part with between the lower part main part, pushing part includes push system and backup plate, push system can promote backup plate and wall of a well butt, install the slide ball in the backup plate, the slide ball protrusion in the surface of backup plate, just the slide ball can freely roll around its self axis.

By adopting the oil and gas exploration logging instrument provided by the utility model, the pushing system pushes the backup plate to be abutted against the well wall, at the moment, the sliding ball protrudes out of the outer surface of the backup plate and can freely roll around the axis of the sliding ball, and when the backup plate rubs with the well wall, the sliding ball can help the backup plate to move more easily through the rotation of the sliding ball.

Optionally, be equipped with the slide in the backup plate, be provided with interior spout on two lateral walls of slide respectively, the slide ball wears to locate in the pivot, the both ends of pivot are respectively embedded in the interior spout, the slide ball can be followed the slide free roll.

By adopting the structure, the sliding ball can freely roll along the slideway, the movable range of the sliding ball is larger, and if the friction resistance between the backup plate and the well wall is larger, the sliding ball can move in the slideway, thereby being beneficial to helping the backup plate to move.

Optionally, the outer surface of the slide ball is coated with a paint layer that is resistant to temperatures above 150 ℃.

During oil and gas exploration, the exploration logging instrument needs to measure in a downhole environment, and in many cases the temperature of the downhole environment can be very high, exceeding 150 ℃. If the sliding ball cannot withstand high temperature, the sliding ball can deform or lose efficacy, so that the measurement accuracy and stability of the exploration logging instrument are affected, the durability and reliability of the sliding ball coated with the high-temperature-resistant paint layer can be improved, the possibility of losing efficacy of the sliding ball is reduced, and the normal operation of the exploration logging instrument is ensured.

Optionally, the pushing system includes the dead lever, the one end of dead lever with upper portion main part is connected, the other end of dead lever with lower part main part is connected, the surface cover of dead lever is equipped with removal ring and elastic component, the one end of elastic component with remove ring fixed connection, the other end of elastic component with lower part main part fixed connection, remove the ring can be followed the axis of dead lever reciprocating motion, the one end of backup plate pass through the upper arm with remove the ring and articulate, the other end of backup plate pass through the lower arm with lower part main part articulates, the upper arm with the lower arm all with the backup plate articulates.

By adopting the structure, the fixing rod is connected with the upper main body and the lower main body, for example, threads are arranged at two ends of the fixing rod, and the fixing rod is in threaded connection with the upper main body and the lower main body, so that the well logging instrument can be more conveniently disassembled and assembled; and the movable ring is sleeved on the fixed rod, and the elastic piece can ensure that the connection between the movable ring and the backup plate has certain elasticity, so that the backup plate can be more flexibly adapted to the shape and condition of a well wall, the applicability and the universality of the exploration logging instrument are improved, and the stability and the reliability of the exploration logging instrument can be further improved through the arrangement of the upper support arm and the lower support arm. The backup plate is connected with the movable ring and the lower main body through the upper and lower support arms, so that the backup plate can be more stably fixed on the survey well instrument, the shaking and the offset of the backup plate in the moving process are avoided, and the accuracy and the stability of a measuring result are ensured.

Optionally, the fixing rod is provided with a guide rail parallel to the axis of the fixing rod, the moving ring is internally provided with an inner convex part, the inner convex part can be inserted into the guide rail, and the guide rail is used for limiting the inner convex part to reciprocate along the guide rail.

Because the inner convex part can be inserted into the guide rail, the movable ring can be prevented from tilting and swinging in the sliding process, so that the connection between the movable ring and the fixed rod is ensured to have higher stability and reliability, and the measurement precision and accuracy of the exploration logging instrument are improved.

Optionally, the number of backup plates is at least two, the backup plates are symmetrically arranged on two sides of the fixing rod.

The number of the backup plates is at least two, and the backup plates are symmetrically arranged on two sides of the fixed rod, so that the backup plates can be more stably contacted with the well wall, and the accuracy and the stability of a measuring result are improved.

Optionally, an upper centralizer is mounted at an end of the upper body remote from the pushing portion, and a lower centralizer is mounted at an end of the lower body remote from the pushing portion.

Because the survey logging instrument needs to be measured in a downhole environment, the downhole environment is often severe, and many uncertainty factors exist, such as the shape of the well wall, the size of the well, and the like. The arrangement of the upper centralizer and the lower centralizer can ensure that the exploration logging instrument can still keep stable under the influence of the uncertainty factors, and the shaking and the offset of the exploration logging instrument in the measurement process are avoided, so that the measurement precision and the measurement accuracy of the exploration logging instrument are improved.

Optionally, a gamma probe is installed inside the upper body, a longitudinal detector a is installed inside the lower body, a longitudinal detector B is installed at the lower part of the longitudinal detector a, and a temperature sensor is installed at the lower part of the longitudinal detector B.

The oil and gas reservoirs are usually rich in radioactive elements, and the gamma probe can be used for measuring the content of the radioactive elements in rocks or soil around the well wall, so that the potential oil and gas reservoirs are identified, and the success rate of exploration is improved; the longitudinal detector A and the longitudinal detector B can record the position and the change of the exploration logging instrument in the underground environment, so that an exploration person can better know the shape of a well wall and the distance between the exploration logging instrument and the well wall, and an important reference basis is provided for subsequent exploration work; the temperature sensor can record the temperature change of the underground environment and provide important reference information for the exploratory staff.

Optionally, the outer surfaces of the upper body and the lower body are wrapped with magnetic shielding protective sleeves.

In a downhole environment, there are disturbances of the strong magnetic field that can affect the measurement results of the survey logging instrument, thereby reducing the measurement accuracy and precision. The arrangement of the magnetic shielding protective sleeve can reduce the interference, and protect the exploration logging instrument from being influenced by a strong magnetic field, so that the measurement precision and accuracy are improved, and meanwhile, the magnetic shielding protective sleeve can also reduce friction and damage of the well wall to the exploration logging instrument.

Optionally, an internal power source is also provided within the upper body and/or the lower body.

The setting of internal power supply can provide electric power support for the exploration logging instrument, avoids the situation that the exploration logging instrument can not work normally due to insufficient electric power in the underground environment, and secondly, the setting of internal power supply can reduce the volume and the weight of the exploration logging instrument, and improves portability and portability of the exploration logging instrument. Meanwhile, the arrangement of the internal power supply can enable the exploration logging instrument to operate independently of the external power supply, so that the problems of instability and unreliability of the external power supply are avoided, and the safety and reliability of the exploration logging instrument are improved.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. by adopting the oil and gas exploration logging instrument provided by the utility model, the pushing system pushes the backup plate to be abutted against the well wall, at the moment, the sliding ball protrudes out of the outer surface of the backup plate and can freely roll around the axis of the sliding ball, and when the backup plate rubs with the well wall, the sliding ball can help the backup plate to move more easily through the rotation of the sliding ball.

2. According to the oil and gas exploration logging instrument, the slide way is arranged in the backup plate, the sliding ball can freely roll along the slide way, the movable range of the sliding ball is larger, and if the friction resistance between the backup plate and a well wall is larger, the sliding ball can move in the slide way, so that the backup plate can be helped to move.

3. According to the oil and gas exploration logging instrument, the guide rail parallel to the axis of the fixed rod is arranged on the fixed rod, the inner protruding part is arranged in the moving ring, and the inner protruding part can be inserted into the guide rail, so that the moving ring can be prevented from tilting and swinging in the sliding process, the connection between the moving ring and the fixed rod is ensured to have higher stability and reliability, and the measurement precision and accuracy of the exploration logging instrument are improved.

Drawings

FIG. 1 is a schematic diagram of a hydrocarbon exploration logging instrument;

fig. 2 is an enlarged view of a portion a of fig. 1;

FIG. 3 is a schematic view of the structure from the side of the pushing section area;

FIG. 4 is a schematic diagram of a moving ring structure;

FIG. 5 is a front view of the armrest;

fig. 6 is a sectional view in the direction B-B of fig. 5.

Reference numerals in the drawings: 11-upper main body, 111-upper centralizer, 12-lower main body, 121-lower centralizer, 2-pushing part, 21-backup plate, 211-slideway, 212-sliding ball, 213-inner slideway, 214-rotating shaft, 22-fixed rod, 221-slideway, 23-movable ring, 231-inner convex part, 24-elastic piece, 25-upper support arm, 26-lower support arm, 3-gamma probe, 4-longitudinal detector A, 5-longitudinal detector B, 6-temperature sensor and 7-magnetic shielding protective sleeve.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

In the existing logging instrument, when the backup plate is in contact with the inner wall of the exploratory well with a larger slope, the backup plate can be pressed by the inclined well wall along with the increase of the slope of the inner wall of the exploratory well, the friction force between the backup plate and the well wall is increased, and in the well wall with a larger slope, the backup plate can be clamped on a path in the well with a larger slope along with the downward movement or upward movement of the logging instrument body, so that the movement of the logging instrument is influenced.

As shown in fig. 1-5, the utility model provides an oil and gas exploration logging instrument, which comprises an upper main body 11, a lower main body 12 and a pushing part 2 connecting the upper main body 11 and the lower main body 12, wherein the pushing part 2 is positioned between the upper main body 11 and the lower main body 12, the pushing part 2 comprises a pushing system and a backup plate 21, and the pushing system can push the backup plate 21 to be abutted against a well wall.

As shown in fig. 5 and 6, a slide way 211 is provided in the backup plate 21, a sliding ball 212 is provided in the slide way 211, inner sliding grooves 213 are respectively provided on two side walls of the slide way 211, the sliding ball 212 is arranged on the rotating shaft 214 in a penetrating manner, two ends of the rotating shaft 214 are respectively embedded into the inner sliding grooves 213, the sliding ball 212 can freely roll around the axis of the sliding ball 212, the sliding ball 212 can freely roll along the slide way 211, and the sliding ball 212 protrudes out of the outer surface of the backup plate 21. It is envisioned that instead of providing a slide way on the backup plate 21, the backup plate 21 may be provided with a hole, and the sliding ball 212 is inserted into the rotating shaft 214 to clamp the rotating shaft 214 into the hole on the backup plate 21, i.e. the sliding ball can only freely roll around its own axis at a fixed point.

During oil and gas exploration, the exploration logging instrument needs to measure in a downhole environment, and in many cases the temperature of the downhole environment can be very high, typically exceeding 150 ℃. If the sliding ball 212 cannot withstand high temperature, the sliding ball 212 is deformed or fails, so that the measurement accuracy and stability of the exploration logging instrument are affected, a paint layer which is resistant to the temperature of more than 150 ℃ is coated on the outer surface of the sliding ball 212, the paint layer is not easy to melt at the temperature of 150 ℃, the durability and reliability of the sliding ball 212 coated with the high-temperature resistant paint layer can be improved, the possibility of failure of the sliding ball 212 is reduced, and the normal operation of the exploration logging instrument is ensured.

In this embodiment, the pushing system includes a fixing rod 22, one end of the fixing rod 22 is connected with the bottom end of the upper body 11, the other end of the fixing rod 22 is connected with the top end of the lower body 12, it is envisioned that threads may be formed at two ends of the fixing rod 22, and the fixing rod 22 is in threaded connection with the upper body 11 and the lower body 12, so that the well logging instrument can be more conveniently disassembled and assembled. The outer surface of the fixed rod 22 is sleeved with a movable ring 23 and an elastic piece 24. Specifically, the fixing rod 22 is provided with a guide rail 221 parallel to the axis thereof, the moving ring 23 is provided with an inner protrusion 231, the inner protrusion 231 can be inserted into the guide rail 221, and the guide rail 221 is used for limiting the inner protrusion 231 to reciprocate along the guide rail 221. Since the inner protrusion 231 can be inserted into the guide rail 221, the movable ring 23 can be prevented from tilting and swinging during sliding, so that the connection between the movable ring 23 and the fixed rod 22 is ensured to have higher stability and reliability, and the measurement precision and accuracy of the exploration logging instrument are improved. The movable ring 23 is connected to the lower body 12 through an elastic member 24, where the elastic member 24 may use a spring, which is sleeved on the fixing rod 22, one end of the spring is welded to the lower body 12, and the other end of the spring is welded to the movable ring 23. The movable ring 23 can reciprocate along the axis of the fixed rod 22, and one end of the backup plate 21 is hinged to the movable ring 23 through an upper arm 25, and the other end of the backup plate 21 is hinged to the lower body 12 through a lower arm 26. In this embodiment, the number of the backup plates 21 is two, and correspondingly, the number of the upper support arms 25 and the lower support arms 26 connected with the backup plates 21 is also two, and the two backup plates 21 are symmetrically arranged at two sides of the fixing rod 22. It is contemplated that in order to facilitate sliding of the logging instrument in the borehole wall, the two ends of the backup plate 21 may be provided in a smooth arc shape, which is more beneficial to movement of the instrument.

By adopting the structure, the movable ring 23 is sleeved on the fixed rod 22, and the elastic piece 24 can ensure that the connection between the movable ring 23 and the backup plate 21 has certain elasticity, so that the backup plate 21 can be more flexibly adapted to the shape and condition of a well wall, the applicability and the universality of the exploration logging instrument are improved, and the stability and the reliability of the exploration logging instrument can be further improved by the arrangement of the upper support arm and the lower support arm. The backup plate 21 is connected with the movable ring 23 and the lower main body 12 through the upper and lower support arms, so that the backup plate 21 can be more stably fixed on a survey detection well instrument, shaking and offset of the backup plate 21 in the moving process are avoided, and the accuracy and stability of a measuring result are ensured.

When the instrument is applied to a well with a larger slope, the slope of the well wall is increased, the well wall applies pressure to the two backup plates 21, the backup plates 21 drive the upper support arm 25 and the lower support arm 26 to move, the movable ring 23 is driven to move along the guide rail 221, so that the elastic piece 24 is stressed to deform, and further, as the sliding ball 212 protrudes out of the backup plates 21, the sliding ball 212 contacts with the well wall and rolls in the sliding way 211, so that the backup plates 21 are prevented from being blocked in a exploratory well due to the increase of friction force, and a protection effect is achieved.

According to the oil and gas exploration logging instrument provided by the utility model, the sliding ball 212 capable of freely rolling along the sliding way 211 is arranged in the backup plate 21, and if a well wall with a larger bending slope is encountered, the pushing system pushes the backup plate 21 to be abutted against the well wall, and at the moment, the sliding ball 212 can help the backup plate 21 to keep moving in the well wall. Second, the provision of the sliding ball 212 may reduce friction and wear of the survey logging instrument during use. Since the sliding ball 212 is free to roll along the sliding way 211, it can reduce friction between the survey logging instrument and the borehole wall, thereby reducing wear of the borehole wall and the survey logging instrument. This may extend the useful life of the instrument and reduce the cost of maintenance and replacement of components.

Example 2

As shown in fig. 1, on the basis of embodiment 1, specifically, an upper centralizer 111 is mounted on an end of the upper body 11 remote from the pushing portion 2, and a lower centralizer 121 is mounted on an end of the lower body 12 remote from the pushing portion 2. Because the survey logging instrument needs to be measured in a downhole environment, the downhole environment is often severe, and many uncertainty factors exist, such as the shape of the well wall, the size of the well, and the like. The arrangement of the upper centralizer and the lower centralizer can ensure that the exploration logging instrument can still keep stable under the influence of the uncertainty factors, and the shaking and the offset of the exploration logging instrument in the measurement process are avoided, so that the measurement precision and the measurement accuracy of the exploration logging instrument are improved. The gamma probe 3 is installed in the upper body 11, the longitudinal detector A4 is installed in the lower body 12, the longitudinal detector B5 is installed at the lower part of the longitudinal detector A4, and the temperature sensor 6 is installed at the lower part of the longitudinal detector B5. The outer surfaces of the upper body 11 and the lower body 12 are wrapped with a magnetic shielding protective sleeve 7, and in particular, the magnetic shielding protective sleeve 7 can be made of P550 nonmagnetic stainless steel. In a downhole environment, there are disturbances of the strong magnetic field that can affect the measurement results of the survey logging instrument, thereby reducing the measurement accuracy and precision. The arrangement of the magnetic shielding protective sleeve 7 can reduce the interference and protect the exploration logging instrument from being influenced by a strong magnetic field, so that the measurement precision and accuracy are improved, and meanwhile, the magnetic shielding protective sleeve 7 can also reduce friction and damage of a well wall to the exploration logging instrument. An internal power source is also provided within the upper body 11 and/or the lower body 12. The setting of internal power supply can provide electric power support for the exploration logging instrument, avoids the situation that the exploration logging instrument can not work normally due to insufficient electric power in the underground environment, and secondly, the setting of internal power supply can reduce the volume and the weight of the exploration logging instrument, and improves portability and portability of the exploration logging instrument. Meanwhile, the arrangement of the internal power supply can enable the exploration logging instrument to operate independently of the external power supply, so that the problems of instability and unreliability of the external power supply are avoided, and the safety and reliability of the exploration logging instrument are improved.

When the logging tool for oil and gas exploration is used, an operator drills a well in advance through drilling equipment, then hangs the logging tool for oil and gas exploration through a wire rope, and places a logging tool body into the well by using the wire rope through crane equipment by connecting the wire rope with a host outside, and in the process of placing the logging tool body, the logging tool body can keep the logging tool body in a vertical state of the well by using the upper centralizer 111 and the lower centralizer 121. The backup plate 21 contacts the well wall, so that the distance between the middle part of the logging instrument body and the well wall is kept, and the collision between the logging instrument body and the well wall is prevented when a well exploratory path with a larger slope is passed. The gamma rays are emitted by the gamma probe 3 and absorbed by atomic nuclei in the stratum when passing through the stratum, then the longitudinal detector A4 and the longitudinal detector B5 receive the residual gamma rays in the stratum, temperature data are collected by the temperature sensor 6 and transmitted to the host computer through the wire rope, the temperature information is displayed on the host computer, the host computer measures the intensity of the received gamma rays, the content of radioactive elements in the stratum is calculated, and the structure and the property of the stratum can be determined by analyzing the content of the radioactive elements with different depths, so that the oil gas content in the stratum is known.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The utility model provides an oil gas exploration logging instrument, its characterized in that includes upper portion main part (11), lower part main part (12) and connects upper portion main part (11) with pushing away portion (2) of lower part main part (12), pushing away portion (2) are located upper portion main part (11) with between lower part main part (12), pushing away portion (2) include push system and backup plate (21), push system can promote backup plate (21) and wall of a well butt, install in backup plate (21) slide ball (212), slide ball (212) protrusion in the surface of backup plate (21), just slide ball (212) can freely roll around its self axis.

2. The oil and gas exploration logging instrument according to claim 1, wherein a slide way (211) is arranged in the backup plate (21), inner slide grooves (213) are respectively arranged on two side walls of the slide way (211), the sliding balls (212) are arranged on the rotating shaft (214) in a penetrating manner, two ends of the rotating shaft (214) are respectively embedded into the inner slide grooves (213), and the sliding balls (212) can freely roll along the slide way (211).

3. A logging device for oil and gas exploration according to claim 1, characterized in that the outer surface of the sliding ball (212) is coated with a paint layer which is resistant to temperatures above 150 ℃.

4. A logging tool for oil and gas exploration according to claim 3, wherein the pushing system comprises a fixed rod (22), one end of the fixed rod (22) is connected with the upper body (11), the other end of the fixed rod (22) is connected with the lower body (12), a movable ring (23) and an elastic member (24) are sleeved on the outer surface of the fixed rod (22), one end of the elastic member (24) is fixedly connected with the movable ring (23), the other end of the elastic member (24) is fixedly connected with the lower body (12), the movable ring (23) can reciprocate along the axis of the fixed rod (22), one end of the backup plate (21) is hinged with the movable ring (23) through an upper support arm (25), the other end of the backup plate (21) is hinged with the lower body (12) through a lower support arm (26), and both the upper support arm (25) and the lower support arm (26) are hinged with the backup plate (21).

5. The oil and gas exploration logging instrument according to claim 4, wherein the fixed rod (22) is provided with a guide rail (221) parallel to the axis of the fixed rod, an inner convex part (231) is arranged in the moving ring (23), the inner convex part (231) can be inserted into the guide rail (221), and the guide rail (221) is used for limiting the inner convex part (231) to reciprocate along the guide rail (221).

6. The oil and gas exploration logging instrument according to claim 5, wherein the number of the backup plates (21) is at least two, and the backup plates (21) are symmetrically arranged on two sides of the fixed rod (22).

7. A logging tool for oil and gas exploration according to any of the claims 1-6, wherein an upper centralizer (111) is mounted at the end of the upper body (11) remote from the pushing portion (2), and a lower centralizer (121) is mounted at the end of the lower body (12) remote from the pushing portion (2).

8. An oil and gas exploration logging instrument according to claim 7, characterized in that the interior of the upper body (11) is provided with a gamma probe (3), the interior of the lower body (12) is provided with a longitudinal detector a (4), the lower part of the longitudinal detector a (4) is provided with a longitudinal detector B (5), and the lower part of the longitudinal detector B (5) is provided with a temperature sensor (6).

9. An oil and gas exploration logging instrument according to claim 8, characterized in that the outer surfaces of the upper body (11) and the lower body (12) are both wrapped with a magnetic shielding protective sleeve (7).

10. A logging device according to claim 1, wherein an internal power source is also provided in the upper body (11) and/or the lower body (12).