A kind of safe delivery device for underground measuring instrument

Abstract

The invention discloses a projection-type safe delivery device for downhole measuring instruments, which relates to the technical field of geological drilling and drilling engineering. A steel cable installation hole is arranged on a salvage head, and the salvage head is connected to the upper end of a connecting chamber through a plurality of telescopic straightening brackets. The lower end of the connecting chamber, an upper joint of an instrument chamber, an instrument chamber, a lower joint of an instrument chamber, a plurality of turbine reduction joints and the upper ends of turbine joint joints are connected in sequence. The lower end of the turbine joint joint is connected to the upper end of an upper joint of a damping cylinder through a plurality of telescopic straightening brackets. A hydraulic damping cylinder is installed at the lower end of the upper joint of the damping cylinder, and a through hole is arranged on the surface of the hydraulic damping cylinder. The upper end of a bottom telescopic piston extends into the interior of the hydraulic damping cylinder, and a collision base is arranged on the lower end of the bottom telescopic piston. A buffer spring is sleeved on the bottom telescopic piston, and the buffer spring is located between the lower end surface of the hydraulic damping cylinder and the upper end surface of the collision base. The device greatly improves safety, flexibility and accuracy, is more efficient and reliable, and has strong applicability.

Description

Technical Field

[0001] The invention relates to the technical field of geological drilling and drilling engineering, and in particular to a projection-type safe delivery device for a downhole measuring instrument. Background Art

[0002] The bottom hole parameter measurement technology is known as the "eye" of drilling engineering and is an extremely important link in the drilling and drilling process. During the drilling process, the bottom drilling tools such as the drill bit, downhole power drilling tools, and guide drilling tools drill deep into the formation far away from the surface, which is complex and hidden. The control of the drilling trajectory, the judgment of the downhole working conditions, the formulation of the drilling process, and the formulation of the drilling fluid plan are all based on the measurement parameters of the bottom hole as the decision-making basis. Therefore, the bottom hole parameters must be effectively obtained.

[0003] The existing measurement technologies for bottom hole drilling parameters mainly include measurement while drilling, bottom sub measurement and drop-in measurement. Measurement while drilling technology relies on mud pulses to transmit data and can obtain bottom hole drilling parameters in real time. It is the most advanced bottom hole data acquisition technology in the drilling industry. However, the instrument has a complex structure, high manufacturing and maintenance costs, low data transmission efficiency, and a small amount of data obtained. Bottom sub measurement mainly involves installing a measuring sub in the bottom drill bit. The sub has a built-in measurement module and storage module, which can store a large amount of bottom hole data during the drilling process in advance. However, the data must be replayed after the drill is lifted, and valid data cannot be obtained during the drilling process. Different from the measurement while drilling and bottom short section measurement, the immersion measurement technology does not require the installation of test instruments near the drill bit in advance. According to the actual situation of the drilling process, the test tools can be inserted into the drill pipe at any time to obtain the bottom hole parameters. It is flexible to use and has obvious advantages in the rapid acquisition of key parameters during the drilling process. Moreover, the immersion measurement can avoid the instrument working at the bottom of the hole for a long time. Through the built-in insulation Dewar flask and other methods, the instrument is allowed to work at a higher temperature within a few hours, providing a method for the rapid acquisition of bottom hole parameters under high temperature conditions.

[0004] However, there are also some problems with immersion measurement, which limit its application. First, with the development of the industry, the measurement accuracy of bottom hole parameters is getting higher and higher. However, the shock-absorbing and buffering mechanism of existing immersion instruments mainly relies on the bottom spring. The primary buffering method relying solely on the spring cannot guarantee the safety of the internal sensors or probes of the test instrument, and there is no deceleration mechanism. The instrument has a high downward speed before touching the bottom, and the impact force of the bottom collision can easily cause damage to the measuring instrument and the probe, which cannot meet the measurement accuracy and safety requirements. Second, after the existing immersion instrument is put into the drill pipe, it must be taken out after the drill is lifted. It is impossible to obtain data without lifting the drill. The work efficiency and flexibility need to be greatly improved. space; third, most of the existing projection-type measuring instruments are for single-parameter measurement, and different projection-type measuring tools are used for different parameter measurements, resulting in the need to equip multiple sets of projection-type measuring tools for multi-parameter measurement, and the inability to achieve interchangeability of the projection-type measuring instruments with different parameters on the projection-type tools; fourth, in order to ensure that the existing projection-type measuring instruments can smoothly reach the bottom of the well, the gap between the stabilizer used in the existing projection-type measuring instruments and the inner wall of the drill pipe is relatively large. After reaching the bottom of the well, the instrument cannot be located at the center of the drill pipe, and the measurement accuracy requirements of some parameters cannot be met. Moreover, this type of stabilizer is only applicable to the inner flat drill pipe (collar) form, and cannot meet the projection measurement in the drill string with a changed inner diameter, and its applicability is limited. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a projection-type safe delivery device for downhole measuring instruments, which greatly improves the safety, flexibility and accuracy, is more efficient and reliable, and has strong applicability.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a device for safely delivering downhole measuring instruments by casting, comprising a fishing head, a connecting chamber, an instrument chamber, an upper joint of the instrument chamber, a lower joint of the instrument chamber, a hydraulic damping cylinder, an upper joint of the damping cylinder, a bottom telescopic piston, a collision base, a buffer spring, a turbine joint, a plurality of turbine reduction joints and a plurality of telescopic straightening brackets, wherein the fishing head is provided with a steel cable mounting hole, the fishing head is connected to the upper end of the connecting chamber through a plurality of the telescopic straightening brackets, the lower end of the connecting chamber, the upper joint of the instrument chamber, the instrument chamber, the lower joint of the instrument chamber, a plurality of the turbine reduction joints and a plurality of the telescopic straightening brackets. The wheel reduction joint and the upper end of the turbine joint are connected in sequence, the lower end of the turbine joint is connected to the upper end of the damping cylinder upper joint through a plurality of the telescopic straightening brackets, the lower end of the damping cylinder upper joint is equipped with the hydraulic damping cylinder, the surface of the hydraulic damping cylinder is provided with a plurality of through holes, the upper end of the bottom telescopic piston extends into the interior of the hydraulic damping cylinder, the lower end of the bottom telescopic piston is equipped with the collision base, the bottom telescopic piston is sleeved with the buffer spring, and the buffer spring is located between the lower end surface of the hydraulic damping cylinder and the upper end surface of the collision base.

[0008] Preferably, the telescopic righting bracket includes a righting center shaft, a spring, two slip rings and multiple telescopic components, the spring and the two slip rings are both sleeved on the righting center shaft, the spring is located above the upper slip ring, the spring is in a pre-tightened state, the telescopic component includes a pin shaft, a righting wheel, two upper support rods and two lower support rods, the upper ends of the two upper support rods are hinged to the upper slip ring, the lower ends of the two lower support rods are hinged to the lower slip ring, the pin shaft connects the lower ends of the two upper support rods and the upper ends of the two lower support rods, and the righting wheel is sleeved on the pin shaft.

[0009] Preferably, the two ends of the central axis of the telescopic righting bracket arranged between the salvaging head and the connecting chamber are respectively threadedly connected to the lower end of the salvaging head and the upper end of the connecting chamber, the two ends of the central axis of the telescopic righting bracket arranged between the turbine joint and the upper joint of the damping cylinder are respectively threadedly connected to the lower end of the turbine joint and the upper end of the upper joint of the damping cylinder, and the lower end of the upper joint of the damping cylinder is threadedly connected to the hydraulic damping cylinder.

[0010] Preferably, it also includes an anti-collision rib, the upper joint of the damping cylinder is provided with a step surface, the anti-collision rib is sleeved on the outside of the upper joint of the damping cylinder, and the anti-collision rib is located between the slip ring in the lower middle part of the telescopic straightening bracket and the step surface of the upper joint of the damping cylinder.

[0011] Preferably, the turbine reduction joint includes a turbine center shaft, a turbine and two bearings, the two ends of the turbine center shaft are respectively fixedly connected to the inner rings of the two bearings, the turbine gap is sleeved on the turbine center shaft, and the two ends of the turbine are respectively fixedly connected to the outer rings of the two bearings.

[0012] Preferably, the turbine reduction joint is provided in plurality, the turbine center shaft of the top turbine reduction joint is threadedly connected to the joint below the instrument compartment through a stud, the turbine center shaft of the bottom turbine reduction joint is threadedly connected to the turbine joint joint, two adjacent turbine center shafts are threadedly connected, and a bearing gasket is provided between two adjacent bearings of the two turbine reduction joints.

[0013] Preferably, the connecting chamber is threadedly connected to the upper joint of the instrument chamber, the upper joint of the instrument chamber is threadedly connected to the instrument chamber, the lower joint of the instrument chamber is threadedly connected to the instrument chamber, and O-rings are provided at the connections between the two ends of the instrument chamber and the upper joint of the instrument chamber and the lower joint of the instrument chamber.

[0014] Preferably, it also includes a detection window plugging wire, on which an O-ring is arranged, a detection window is arranged in the middle of the joint on the instrument compartment, the detection window plugging wire is used to seal the detection window, and a transverse hole is arranged on the connecting compartment.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The invention provides a device for safely delivering downhole measuring instruments by means of a two-stage buffering function of a buffer spring and a hydraulic damping buffer, and a two-stage deceleration function of a turbine reduction joint and a telescopic straightening bracket, which can ensure that the downhole parameter acquisition instrument is safely delivered to the bottom of the well by means of a throwing method. By setting a telescopic straightening bracket, the device can be ensured to be located at the center of the insertion pipe body, thereby improving the accuracy of the measurement, and can be applied to drill strings with changed inner diameters. By setting a salvage head, it can be matched with salvage devices such as winches and steel cables for salvage, thereby achieving downhole measurement parameters without lifting the drill. The salvage head is provided with a steel cable installation hole, which can be directly connected to the hoisting steel cable, and the instrument is lowered by a winch. The storage-type measurement method is adopted, and the operation of the logging instrument can be partially replaced. The device greatly improves the instrument safety of the throwing operation, has the characteristics of flexibility, efficiency, and reliability, and has strong applicability. It is suitable for oil and gas drilling and geological drilling, and has great advantages and application potential in the measurement of deep well bottom parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a projection-type safe delivery device for a downhole measuring instrument provided by the present invention;

[0019] Figure 2 A cross-sectional view of a projection-type safe delivery device for a downhole measuring instrument provided by the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the telescopic righting support in the present invention;

[0021] Figure 4 It is a front view of the telescopic righting bracket in the present invention;

[0022] Figure 5 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 6 It is a structural schematic diagram of the connecting chamber and the instrument chamber in the present invention.

[0024] Explanation of the reference numerals: 1-collision base; 2-bottom telescopic piston; 3-hydraulic damping cylinder; 4-telescopic righting bracket; 41-righting center axis; 42-spring; 43-slip ring; 44-upper support rod; 45-lower support rod; 46-pin shaft; 47-righting wheel; 5-turbine center axis; 6-turbine; 7-bearing; 8-instrument compartment lower joint; 9-instrument compartment; 10-detection window plug wire; 11-salvage head; 12-connecting compartment; 13-instrument compartment upper joint; 14-stud; 15-bearing gasket; 16-turbine joint; 17-anti-collision rib; 18-damping cylinder upper joint; 19-buffer spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a projection-type safe delivery device for a downhole measuring instrument, which greatly improves the safety, flexibility and accuracy, is more efficient and reliable, and has strong applicability.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-2As shown, the present embodiment provides a device for safely delivering downhole measuring instruments by means of a casting method, comprising a salvaging head 11, a connecting chamber 12, an instrument chamber 9, an upper joint 13 of the instrument chamber, a lower joint 8 of the instrument chamber, a hydraulic damping cylinder 3, an upper joint 18 of the damping cylinder, a bottom telescopic piston 2, a collision base 1, a buffer spring 19, a turbine joint 16, a plurality of turbine reduction joints and a plurality of telescopic straightening brackets 4. A steel cable mounting hole is provided on the salvaging head 11. The salvaging head 11 in the present embodiment can be salvaged using a salvaging device similar to rope coring drilling, so that the casting instrument can be salvaged without lifting the drill, and downhole data can be obtained, which greatly improves the flexibility and economy of the casting method. By providing a steel cable mounting hole, it can be used as a steel cable suspension carrier under specific working conditions to send the measuring probe into the well to obtain parameters, further improving the applicability of the device. The salvage head 11 is connected to the upper end of the connecting chamber 12 through a plurality of telescopic straightening brackets 4, the lower end of the connecting chamber 12, the upper joint 13 of the instrument chamber, the instrument chamber 9, the lower joint 8 of the instrument chamber, a plurality of turbine reduction joints and the upper end of the turbine joint 16 are connected in sequence, the lower end of the turbine joint 16 is connected to the upper end of the damping cylinder upper joint 18 through a plurality of telescopic straightening brackets 4, and the lower end of the damping cylinder upper joint 18 is installed with a hydraulic damping cylinder 3.

[0029] The surface of the hydraulic damping cylinder 3 is provided with a plurality of through holes. Specifically, the plurality of through holes are evenly distributed along the axial direction of the hydraulic damping cylinder 3. The through holes are used to connect the outside of the instrument with the inside of the hydraulic damping cylinder 3. The upper end of the bottom telescopic piston 2 extends into the inside of the hydraulic damping cylinder 3. The lower end of the bottom telescopic piston 2 is provided with a collision base 1. Specifically, the collision base 1 is quasi-conical. The collision base 1 is connected to the bottom telescopic piston 2 by threads. The bottom telescopic piston 2 is provided with a buffer spring 19. The buffer spring 19 is located between the lower end surface of the hydraulic damping cylinder 3 and the upper end surface of the collision base 1. The buffer spring 19 is in a pre-tightened state. The collision base 1, the bottom telescopic piston 2, the buffer spring 19 and the hydraulic damping cylinder 3 together constitute the secondary buffer mechanism of the device. When the device moves to the bottom of the drill string, the collision base 1 collides with the internal limit mechanism of the drill string, compressing the pre-tightened buffer spring 19 to form a primary buffer, and at the same time driving the bottom telescopic piston 2 and the hydraulic damping cylinder 3 to undergo relative displacement. The bottom telescopic piston 2 discharges the drilling fluid inside the hydraulic damping cylinder 3 to the outside of the instrument through multiple through holes, forming hydraulic damping, i.e., secondary buffering. The two-stage buffering works together to ensure the safety of measuring carbon tubes and related electronic components in the testing device.

[0030] like Figure 3-4As shown, the telescopic righting bracket 4 includes a righting center shaft 41, a spring 42, two slip rings 43 and a plurality of telescopic components. The two ends of the righting center shaft 41 are threaded and can be connected to other joints. The spring 42 and the two slip rings 43 are both sleeved on the righting center shaft 41. The spring 42 is located above the upper slip ring 43. The spring 42 is in a pre-tightened state. The telescopic components include a pin 46, a righting wheel 47, two upper support rods 44 and two lower support rods 45. The upper ends of the two upper support rods 44 are hinged on the upper slip ring 43, and the lower ends of the two lower support rods 45 are hinged on the lower slip ring 43. The pin 46 connects the lower ends of the two upper support rods 44 and the upper ends of the two lower support rods 45. The righting wheel 47 is sleeved on the pin 46, and the righting wheel 47 can rotate relative to the pin 46. In this specific embodiment, the plurality of telescopic components are evenly distributed along the circumference, and the number of telescopic components is set to six. The upper slip ring 43 is subjected to downward pressure from the pre-loaded spring 42, so that the upper support rod 44 and the lower support rod 45 always maintain an outwardly extended state, pressing the circumferentially evenly distributed straightening wheels 47 against the inner wall of the drill pipe to play a straightening role. When the device moves downward and encounters a change in the diameter of the inner wall of the drill string, the telescopic straightening bracket 4 can be deformed due to the action of the spring 42, ensuring that the circumferentially evenly distributed straightening wheels 47 maintain contact with the inner wall of the drill pipe, playing a telescopic straightening role. At the same time, the straightening wheels 47 of the telescopic straightening bracket 4 generate friction with the inner wall of the drill pipe, which can also play a certain deceleration role during the downward movement of the device. Specifically, the straightening wheels 47 can be made of metal, rubber or other materials as needed to match the appropriate friction coefficient.

[0031] In this specific embodiment, a telescopic righting bracket 4 is installed at the upper and lower parts of the device, which plays the role of righting the entire device. If the instrument compartment 9 in the device is long, that is, there are more built-in sensors, storage systems and power supply batteries, the number of telescopic righting brackets 4 can be increased according to demand to ensure that the device is located at the center of the drill string. When two or more telescopic righting brackets 4 are installed at the upper or lower part of the device, a connecting joint needs to be provided between two adjacent righting center shafts 41, and the two righting center shafts 41 are threadedly connected to the connecting joint.

[0032] In this specific embodiment, the two ends of the central axis of the telescopic righting bracket 4 arranged between the fishing head 11 and the connecting chamber 12 are respectively threadedly connected to the lower end of the fishing head 11 and the upper end of the connecting chamber 12, and the two ends of the central axis of the telescopic righting bracket 4 arranged between the turbine joint 16 and the damping cylinder upper joint 18 are respectively threadedly connected to the lower end of the turbine joint 16 and the upper end of the damping cylinder upper joint 18, and the lower end of the damping cylinder upper joint 18 is threadedly connected to the hydraulic damping cylinder 3.

[0033] In order to prevent the inner wall of the drill string from directly hitting the telescopic straightening bracket 4 due to the change in diameter, an anti-collision rib 17 is further provided in this embodiment, and the damping cylinder upper joint 18 is provided with a step surface. The anti-collision rib 17 is sleeved outside the damping cylinder upper joint 18, and the anti-collision rib 17 is located between the slip ring 43 in the lower middle part of the telescopic straightening bracket 4 and the step surface of the damping cylinder upper joint 18. Specifically, the anti-collision rib 17 includes a sleeve and a plurality of side ribs, and the plurality of side ribs are fixed on the outer wall of the sleeve and evenly distributed along the circumferential direction. The sleeve is sleeved outside the damping cylinder upper joint 18, and the slip ring 43 of the telescopic straightening bracket 4 and the step surface of the damping cylinder upper joint 18 fix the sleeve.

[0034] The friction deceleration of the telescopic righting bracket 4 is the primary deceleration of the device. In addition, in this embodiment, a turbine reduction joint is also provided to effectively control the speed of the downward movement of the device, that is, the secondary deceleration of the device. Figure 5 As shown, the turbine reduction joint includes a turbine center shaft 5, a turbine 6 and two bearings 7. The two ends of the turbine center shaft 5 are fixedly connected to the inner rings of the two bearings 7 respectively. The turbine 6 is sleeved on the turbine center shaft 5 in a gap, and the two ends of the turbine 6 are fixedly connected to the outer rings of the two bearings 7 respectively. One or more turbine reduction joints can be installed according to the needs, and the overall weight of the device increases. The more turbine reduction joints can be installed, the better the deceleration effect of the device moving downward. The turbine 6 is connected to the turbine center shaft 5 through the bearing 7, so that the turbine 6 rotates while moving relative to the drilling fluid, generating an upward lift, reducing the acceleration of the device moving downward, and playing a deceleration role. Through the configuration of multiple turbine reduction joints, the device can maintain a reasonable speed and orientation in a uniform descending state after moving downward for a certain distance, avoiding collision damage caused by excessive descending speed of the device. The rotation of the turbine 6 causes part of the rotating force to be transmitted to the bearing 7 and then to the device body. This part of the rotating force can be offset by the friction between the telescopic straightening bracket 4 and the inner wall of the drill pipe, so that the device body does not rotate.

[0035] Specifically, the turbine reduction joint is provided in multiple numbers, the turbine center shaft 5 of the top turbine reduction joint is threadedly connected to the lower joint 8 of the instrument compartment through the stud 14, the turbine center shaft 5 of the bottom turbine reduction joint is threadedly connected to the turbine joint joint 16, the two adjacent turbine center shafts 5 are threadedly connected, and a bearing gasket 15 is provided between the two adjacent bearings 7 of the two turbine reduction joints. In this specific embodiment, the turbine reduction joint is provided in two numbers.

[0036] The connecting chamber 12 is threadedly connected to the upper joint 13 of the instrument chamber, the upper joint 13 of the instrument chamber is threadedly connected to the instrument chamber 9, the lower joint 8 of the instrument chamber is threadedly connected to the instrument chamber 9, and O-rings are provided at the connection points between the two ends of the instrument chamber 9 and the upper joint 13 of the instrument chamber and the lower joint 8 of the instrument chamber. The O-rings can ensure that the instrument chamber 9 is isolated from the external drilling fluid, achieve sealing, and provide a working environment for electronic systems such as measuring instruments, probes, batteries, and storage circuits inside the instrument chamber 9.

[0037] like Figure 6 As shown, in order to improve the delivery device to meet the needs of sending various measuring probes into the well, the present embodiment also includes a detection window plugging wire 10, on which an O-ring is provided, and a detection window is provided in the middle of the joint 13 on the instrument compartment, and the detection window plugging wire 10 is used to seal the detection window. The detection window is provided to meet the needs of the temperature, pressure and other measuring probes in contact with the outside. When the detection window is not needed, such as for measurements of well inclination, azimuth, rotation speed, vibration, etc., the detection window plugging wire 10 is used in conjunction with the O-ring to ensure sealing. In order to ensure the use environment of the detection window, the joint 13 on the instrument compartment is fixed with a connecting compartment 12 by threads, and a transverse hole is provided on the connecting compartment 12, which is connected to the external drilling fluid and provides the environmental state in the hole. The outer tube of the instrument compartment 9 can use a heat-insulating Dewar flask design to improve the high temperature resistance of the internal instruments and circuits at the bottom of the hole.

[0038] The conventional outer diameter of the device in this embodiment is φ42mm, which meets the requirements of the oil and gas drilling and geological drilling industries, and can meet the requirements of immersion measurement in various conventional drill pipes (collars). According to the special drill string design, it can be adapted through structural design, which has flexible application advantages.

[0039] The downhole measuring instrument's safe delivery device in this embodiment has multiple operation modes:

[0040] First, the device in this embodiment can use the instrument (probe) of the conventional immersion measurement method to lower the task, and after the drill is lifted, the device is taken out to read the bottom hole data. It only needs to install the corresponding measurement probe (sensor) and power supply and storage module in the instrument compartment 9 to meet the measurement requirements of key bottom hole parameters such as well inclination, temperature, pressure, rotation speed, vibration, etc. The use of non-magnetic materials to make the device body can also meet the measurement of orientation. The time of being put into the well, the measurement time, and the time of lifting the drill can be flexibly determined according to the on-site conditions. There is no need to use a detection window for the measurement of well inclination, orientation, rotation speed, vibration, etc., and the detection window plug wire 10 and O-ring are used to seal the instrument compartment 9. The measurement of key parameters such as temperature and pressure requires the sensor to directly contact the external environment. The detection window plug wire 10 can be removed and the corresponding sensor can be installed for measurement.

[0041] The second type is the salvageable immersion measurement. Since the upper end of the device in this embodiment is provided with a salvage head 11, it can be matched on site with a steel cable salvage device suitable for lowering inside the drill pipe, and the downhole parameters can be obtained at any time through salvage. It is suitable for geological drilling rope coring drilling technology, and can also be used for oil and gas drilling, eliminating the need to lift the drill to obtain data, and obtaining data at any time, reducing costs and increasing efficiency, and improving the flexibility, efficiency and economy of downhole data acquisition. The device in this embodiment has obvious advantages in obtaining deep well bottom parameters. The deeper the well, the more obvious the cost reduction and efficiency increase.

[0042] The third type is the hoisting measurement operation. The fishing head 11 at the upper end of the device in this embodiment is provided with a steel cable installation hole, which can be directly connected to the hoisting steel cable. The instrument is lowered by a winch, which can not only meet the casting mode inside the drill pipe, but also be applied to the in-hole parameter measurement inside the casing, screen pipe and other pipes. The storage measurement method is adopted to partially replace the logging operation to obtain the in-hole parameters.

[0043] It can be seen that the device in this embodiment adopts a two-stage buffering function of the buffer spring 19 and the hydraulic damping buffer, and a two-stage deceleration function of the turbine reduction joint and the telescopic straightening bracket 4, which can ensure that the downhole parameter acquisition instrument is safely sent to the bottom of the well by the casting method. By setting the telescopic straightening bracket 4, it can be ensured that the device is located at the center of the injection pipe body, improve the accuracy of the measurement, and can be used in the drill string with a changed inner diameter. By setting the salvage head 11, it can be matched with salvage devices such as winches and steel cables for salvage, thereby realizing the acquisition of downhole measurement parameters without lifting the drill. The salvage head 11 is provided with a steel cable installation hole, which can be directly connected to the hoisting steel cable, and the instrument is lowered by the winch. The storage measurement method is adopted, which can partially replace the logging instrument operation. The device greatly improves the instrument safety of the casting operation, has the characteristics of flexibility, efficiency, reliability, strong applicability, and is suitable for oil and gas drilling and geological drilling. It has great advantages and application potential in the measurement of deep well bottom parameters.

[0044] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A safe delivery device for underground measuring instruments, characterized in that: The invention comprises a salvaging head, a connecting chamber, an instrument chamber, an upper joint of the instrument chamber, a lower joint of the instrument chamber, a hydraulic damping cylinder, an upper joint of the damping cylinder, a bottom telescopic piston, a collision base, a buffer spring, a turbine joint, a plurality of turbine reduction joints and a plurality of telescopic straightening brackets. The salvaging head is provided with a steel cable mounting hole. The salvaging head is connected to the upper end of the connecting chamber through a plurality of telescopic straightening brackets. The lower end of the connecting chamber, the upper joint of the instrument chamber, the instrument chamber, the lower joint of the instrument chamber, a plurality of turbine reduction joints and the turbine joint are The upper ends of the turbine joints are connected in sequence, the lower end of the turbine joint is connected to the upper end of the damping cylinder upper joint through a plurality of the telescopic straightening brackets, the lower end of the damping cylinder upper joint is equipped with the hydraulic damping cylinder, the surface of the hydraulic damping cylinder is provided with a plurality of through holes, the upper end of the bottom telescopic piston extends into the interior of the hydraulic damping cylinder, the lower end of the bottom telescopic piston is equipped with the collision base, the bottom telescopic piston is sleeved with the buffer spring, and the buffer spring is located between the lower end surface of the hydraulic damping cylinder and the upper end surface of the collision base.

2. The projectile-type safe delivery device for downhole measuring instruments according to claim 1, characterized in that: The telescopic righting bracket includes a righting center shaft, a spring, two slip rings and a plurality of telescopic components, the spring and the two slip rings are both sleeved on the righting center shaft, the spring is located above the upper slip ring, and the spring is in a pre-tightened state, the telescopic component includes a pin shaft, a righting wheel, two upper support rods and two lower support rods, the upper ends of the two upper support rods are hinged to the upper slip ring, the lower ends of the two lower support rods are hinged to the lower slip ring, the pin shaft connects the lower ends of the two upper support rods and the upper ends of the two lower support rods, and the righting wheel is sleeved on the pin shaft.

3. The projectile-type safe delivery device for downhole measuring instruments according to claim 2, characterized in that: The two ends of the central axis of the telescopic central axis support provided between the salvaging head and the communicating chamber are respectively threadedly connected to the lower end of the salvaging head and the upper end of the communicating chamber; the two ends of the central axis of the telescopic central axis support provided between the turbine joint and the upper joint of the damping cylinder are respectively threadedly connected to the lower end of the turbine joint and the upper end of the upper joint of the damping cylinder; the lower end of the upper joint of the damping cylinder is threadedly connected to the hydraulic damping cylinder.

4. The projectile-type safe delivery device for downhole measuring instruments according to claim 2, characterized in that: It also includes an anti-collision rib, the upper joint of the damping cylinder is provided with a step surface, the anti-collision rib is sleeved on the outside of the upper joint of the damping cylinder, and the anti-collision rib is located between the slip ring in the lower middle part of the telescopic straightening bracket and the step surface of the upper joint of the damping cylinder.

5. The projectile-type safe delivery device for downhole measuring instruments according to claim 1, characterized in that: The turbine reduction joint includes a turbine center shaft, a turbine and two bearings, wherein the two ends of the turbine center shaft are respectively fixedly connected to the inner rings of the two bearings, the turbine gap is sleeved on the turbine center shaft, and the two ends of the turbine are respectively fixedly connected to the outer rings of the two bearings.

6. The projectile-type safe delivery device for downhole measuring instruments according to claim 5, characterized in that: The turbine reduction joint is provided in plurality, the turbine center shaft of the top turbine reduction joint is threadedly connected to the joint below the instrument compartment through a stud, the turbine center shaft of the bottom turbine reduction joint is threadedly connected to the turbine joint joint, two adjacent turbine center shafts are threadedly connected, and a bearing gasket is provided between two adjacent bearings of the two turbine reduction joints.

7. The projectile-type safe delivery device for downhole measuring instruments according to claim 1, characterized in that: The connecting chamber is threadedly connected to the upper joint of the instrument chamber, the upper joint of the instrument chamber is threadedly connected to the instrument chamber, the lower joint of the instrument chamber is threadedly connected to the instrument chamber, and O-rings are provided at the connections between the two ends of the instrument chamber and the upper joint of the instrument chamber and the lower joint of the instrument chamber.

8. The projectile-type safe delivery device for downhole measuring instruments according to claim 7, characterized in that: It also includes a detection window plugging wire, on which an O-ring is arranged, a detection window is arranged in the middle of the joint on the instrument compartment, the detection window plugging wire is used to seal the detection window, and a transverse hole is arranged on the connecting compartment.

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