CN112112592B - Conveying device and method for deep well measuring instrument - Google Patents

Abstract

The invention discloses a deep well measuring instrument transportation device and method. The transportation device includes a logging assembly or at least two logging assemblies connected in series, a drill pipe, a screw drilling tool and a pilot drill bit. The logging assembly is composed of a raise drill bit. It is composed of an instrument working cabin and a fixing device of the instrument working cabin. The method of transporting underground measuring instruments includes lowering and lifting. The rotational power of the leading drill bit is provided by the upper screw drilling tool to break the stuck rock blocks encountered during the lowering process, which not only avoids the rotation of the instrument working cabin during the lowering process but also ensures smooth lowering; the downhole measuring instruments are integrated in the instrument working cabin. It can realize the simultaneous installation of multiple instrument work chambers and carry out simultaneous measurements in well sections with different depths; a raise drill bit is threaded on the upper part of the fixing device of each instrument work chamber, and when lifted up, the entire conveying device is driven by the drilling rig to rotate slowly. , the drill bit rotates slowly to cut and break the collapsed rock blocks to ensure the rapid escape and improvement of the instrument working cabin.

Description

A deep well measuring instrument transportation device and method

Technical field

The invention belongs to the field of geophysical exploration, and specifically relates to a deep well measuring instrument transportation device and method.

Background technique

Logging technology is widely used in resource exploration and engineering exploration. It is also called geophysical logging. It uses measuring instruments to measure the electrochemical properties, conductive properties, acoustic properties, radioactivity and other geophysical properties of open-hole well wall rock formations. It belongs to One of the applied geophysical methods.

As drilling depth increases and logging requirements increase, measuring instruments are required to perform long-term measurements (3 to 5 years) in deep wells. The high-pressure, high-temperature and complex formation construction environment in deep wells places special demands on downhole instrument installation equipment. The safety and reliability of underground conveying devices will become important considerations for the stable operation of logging instruments.

When lowering measuring instruments into deep wells, accidents such as jamming and scratching may occur during the lowering process due to the roughness of the hole wall or the complex conditions inside the hole, especially in open hole conditions. During the long-term operation of downhole measuring instruments, due to the complex geological structure and unforeseen factors, there is a high risk of stability of the deep well open hole wall, which is prone to collapse and blockage. Therefore, measuring instruments or other supporting pipe sections are easily stuck in the well. As a result, the entire measurement system instrument cannot be lifted up.

Contents of the invention

The purpose of the present invention is to provide a deep well measuring instrument transportation device and method to solve the problems of the measuring instrument working in deep wells such as jamming when lowering, collapse and falling of pieces, and difficulty in lifting.

In order to achieve the above object, the present invention adopts the following technical solution: a deep well measuring instrument transportation device, including: a logging assembly or at least two logging assemblies connected in series, a drill pipe, a screw drilling tool and a pilot drill bit, and a logging assembly. It consists of a raise drill bit, an instrument working cabin and a fixing device of the instrument working cabin. The raise bit and the fixing device of the instrument working cabin are coaxially arranged and connected internally. The lower end of the raise drill bit is threadedly connected to the upper end of the fixing device of the instrument working cabin; the instrument works Downhole measuring instruments are integrated inside the cabin, and the downhole measuring instruments are connected to the data processing center located on the ground through cables; the instrument working cabin is fixed on the outer wall of the instrument working cabin fixture; a logging component or at least two series-connected The logging assembly is arranged between the drill pipe and the screw drilling tool. The drill pipe is threadedly connected to the upper end of the raise drill bit close to it and is internally connected. The screw drilling tool is threaded to the lower end of the instrument working cabin fixture close to it, and Internally connected; the pilot drill bit and the screw drill tool are coaxially arranged and internally connected, and the pilot drill bit is threadedly connected below the screw drill tool;

Among them, the drill bit cutting surface of the raise drill bit faces the drill pipe located above it; the pilot drill bit has two upper and lower drill bit cutting surfaces, namely the upper cutting surface and the lower cutting surface. The two drill bit cutting surfaces face the opposite direction and are located above. The cutting surface of the drill bit faces the screw drill.

Further, threaded holes are provided at the upper and lower ends of the instrument working cabin.

Further, the instrument working cabin fixing device is composed of the instrument working cabin fixing device body and a fixing block arranged on the outer wall of the instrument working cabin fixing device body. The instrument working cabin fixing device body is a cylindrical structure with openings at both ends. The two ends of the working cabin fixing device body have connecting threads; the fixing block is provided with threaded holes, and the threaded holes on the fixing block are opposite to the threaded holes on the instrument working cabin. Bolts pass through the fixing block. The threaded holes and the threaded holes on the instrument working cabin enable the instrument working cabin to be installed to be fixed on the instrument working cabin fixing device.

Furthermore, the raise bit has an integrated structure. The raise bit is composed of a raise bit body and cutting units evenly distributed around the central axis of the raise bit body. Both ends of the raise bit body have connecting threads, which can be A nozzle is provided between two adjacent cutting units.

Further, the pilot drill bit is composed of a pilot drill bit body and a cutting disk that is sleeved on the outside of the pilot drill bit body. The pilot drill bit body is an integral structure. There is a water inlet reserved on the cutting disk. The number of cutting disks is two. Two. The cutting discs are arranged up and down. The cutting surface of the upper cutting disc faces upward and is called the upper cutting surface. The cutting surface of the lower cutting disc faces downward and is called the lower cutting surface.

A method for transporting downhole measuring instruments using the above-mentioned deep well measuring instrument transporting device includes the following steps:

Step 1. Assemble the deep well measuring instrument transport device on the ground;

Step 2: Hang the assembled deep well measuring instrument transport device through the derrick, lower the deep well measuring instrument transport device into the wellbore; turn on the mud pump, inject mud into the drill pipe, and the mud flows through the deep well measuring instrument transport device. After flowing out through the pilot drill bit, it returns to the ground from the gap between the deep well measuring instrument transport device and the wellbore wall, completing the positive cycle, thereby driving the screw drill tool and the pilot drill bit to rotate in a single motion, and is broken by the lower cutting surface of the pilot drill bit Blockages encountered during lowering;

Step 3: Continue to lower the deep well measuring instrument transport device by connecting the drill pipe. When the instrument working chamber is lowered to the designated measurement area, stop lowering and turn off the mud pump. At this time, the downhole measuring instrument inside the instrument working chamber starts to work. And transmit the data measured by the downhole measuring instruments to the data processing center through cables;

Step 4: When the measurement is completed or the instrument working cabin needs to be lifted up in an emergency, the drill pipe is clamped by the chuck of the drilling rig on the surface, and the drill pipe is driven to drive the entire deep well measuring instrument transport device to rotate and pull up. At this time, the reverse The well drill bit rotates together with the pilot drill bit. The cutting surface of the raise bit rotates to break the fallen and collapsed rock blocks on the upper hole wall. The upper cutting surface of the pilot drill bit crushes the fallen and collapsed rock blocks at the lower part of the raise drill bit, completing the raising process. Lift action.

Through the above design scheme, the present invention can bring the following beneficial effects:

1. The deep well measuring instrument conveying device and method proposed by the present invention installs a pilot drill bit at the tail of the entire conveying device, and the rotational power is provided by the upper screw drill tool to break the stuck rock blocks encountered during the lowering process, thereby avoiding lowering. During the process, the instrument working cabin rotates, which also ensures the smooth lowering of the instrument working cabin;

2. The measuring instruments are integrated in the instrument working cabin and installed on the instrument working cabin fixing device. The instrument working cabin fixing device is connected to the upper device through threads, which can realize the simultaneous installation of multiple instrument working cabins in well sections with different depths. Simultaneous measurement, the measurement data is larger and more accurate;

3. A raise drill bit is threaded on the upper part of the fixing device of each instrument working cabin. When lifting up, the drilling rig at the hole drives the entire deep well measuring instrument transport device to rotate and pull up. At this time, the raise drill bit slowly rotates to realize the drill bit collapse. The cutting and crushing of rock blocks ensures the rapid escape and improvement of the instrument working cabin with underground measuring instruments integrated inside.

Description of the drawings

The description of the drawings here is used to provide a further understanding of the present invention and constitutes a part of the application of the present invention. The illustrative embodiments of the present invention and their descriptions are used to understand the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings :

Figure 1 is a schematic diagram of the lowering of the deep well measuring instrument transport device in the embodiment of the present invention;

Figure 2 is a prompt diagram on the deep well measuring instrument transport device in the embodiment of the present invention;

Figure 3 is a front view of the raise drill bit in the embodiment of the present invention;

Figure 4 is an oblique view of a raise drill bit in an embodiment of the present invention;

Figure 5 is a front view of the pilot drill bit in the embodiment of the present invention;

Figure 6 is a perspective view of the pilot drill bit in the embodiment of the present invention;

Figure 7 is a front view of the instrument working cabin fixing device in the embodiment of the present invention;

Figure 8 is a perspective view of the fixing device of the instrument working cabin in the embodiment of the present invention.

The marks in the figure are as follows: 1-derrick; 2-drilling rig; 3-mud pump; 4-data processing center; 5-well bore; 6-raise bit; 7-instrument working cabin; 8-cable; 9-drill Rod; 10-instrument working cabin fixture; 11-screw drilling tool; 12-pilot drill bit; 13-fixing block; 601-raise bit body; 602-cutting unit; 603-nozzle; 1201-pilot bit body; 1202- Cutting disc.

Implementation

In order to have a clearer understanding of the technical solutions, purposes and effects of the present invention, the technical solutions in the embodiments of the present invention are now clearly and completely described in conjunction with the specific implementation modes illustrated in the accompanying drawings. Obviously, the described embodiments are the practical Some, not all, of the new embodiments. In order to avoid obscuring the essence of the present invention, well-known methods, processes, flows, components and circuits have not been described in detail. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited. The invention proposes a deep well measuring instrument transport device, which includes: a logging component or at least two logging components connected in series, a drill pipe 9, a screw drilling tool 11 and a pilot drill bit 12. The logging component is composed of a raise drill bit 6 , the instrument working cabin 7 and the instrument working cabin fixing device 10 are composed of the raise drill bit 6 and the instrument working cabin fixing device 10, which are coaxially arranged and connected internally, and the lower end of the raise drill bit 6 is threadedly connected to the upper end of the instrument working cabin fixing device 10; The instrument working cabin 7 is integrated with downhole measuring instruments, and the downhole measuring instruments are connected to the data processing center 4 on the ground through cables 8; the instrument working cabin 7 is fixed on the outer wall of the instrument working cabin fixing device 10; a logging component Or at least two serially connected logging assemblies are arranged between the drill pipe 9 and the screw drilling tool 11. The drill pipe 9 and the upper end of the raise drill bit 6 close to it are threadedly connected and internally connected. The screw drilling tool 11 and the screw drilling tool 11 are connected to it. The lower end of the instrument working cabin fixing device 10 is threaded and connected internally; the pilot drill bit 12 and the screw drill 11 are coaxially arranged and connected internally, and the pilot drill 12 is threadedly connected below the screw drill 11;

Among them, the drill bit cutting surface of the raise drill bit 6 faces the drill pipe 9 located above it; the pilot drill bit 12 has two drill bit cutting surfaces, namely the upper cutting surface and the lower cutting surface, and the two drill bit cutting surfaces face in opposite directions, and The cutting surface of the drill bit located above faces the screw drilling tool 11 .

The deep well measuring instrument transport device can be used for measurement in one measuring well section, or it can be used for simultaneous measurement of multiple well sections in well sections with different depths. When used for measuring one measuring well section, the deep well measuring instrument transport device uses a logging component; application When measuring multiple well sections at different depths, the deep well measuring instrument delivery device uses at least two logging components connected in series.

The following embodiments of the present invention are explained for a measurement well section:

As shown in Figures 1 and 2, the deep well measuring instrument transport device includes a raise drill bit 6, an instrument working cabin 7, a drill pipe 9, an instrument working cabin fixing device 10, a screw drilling tool 11 and a pilot drill bit 12. The well drill bit 6, the instrument working cabin fixing device 10, the screw drilling tool 11 and the pilot drill bit 12 are threaded in sequence from top to bottom and are internally connected.

In order to protect the measuring instruments, the downhole measuring instruments are integrated into the instrument working cabin 7. The instrument working cabin 7 is a metal cabin, and the surface of the metal cabin is coated with an anti-corrosion layer. The upper and lower ends of the instrument working cabin 7 are provided with The threaded hole can be conveniently fixed on the instrument working cabin fixing device 10.

As shown in Figures 7 and 8, the instrument work cabin fixing device 10 is composed of the instrument work cabin fixing device body and a fixing block 13 provided on the outer wall of the instrument work cabin fixing device body. The instrument work cabin fixing device body is open at both ends. The cylindrical structure of the instrument working cabin fixing device body has connection threads at both ends; the fixed blocks 13 are provided with threaded holes, and the instrument working cabin 7 is placed between the fixed blocks 13 arranged up and down. The threaded hole on 13 is opposite to the threaded hole on the instrument working cabin 7. The instrument working cabin 7 to be installed is fixed by bolts passing through the threaded hole on the fixing block 13 and the threaded hole on the instrument working cabin 7. On the instrument working cabin fixing device 10.

The cutting surface of the raise drill bit 6 faces the drill pipe 9 located above it. The drill pipe 9 is clamped by the chuck of the drilling rig 2 on the surface to drive the drill pipe 9, thereby driving the raise drill bit 6 to rotate, thereby realizing rotation and lifting.

As shown in Figures 3 and 4, the raise bit 6 is an integrated structure. The raise bit 6 is composed of a raise bit body 601 and a cutting unit 602 evenly distributed around the central axis of the raise bit body 601. , the raise drill bit body 601 has connecting threads at both ends, and a water port 603 is provided between any two adjacent cutting units 602.

The screw drilling tool 11 drives the screw drilling tool 11 through positive circulation of drilling fluid, which is the mud in the present invention.

The upper end of the pilot drill bit 12 is provided with threads and is connected below the screw drill 11 through threads. The pilot drill 12 has two upper and lower drill bit cutting surfaces. The pilot drill 12 is driven by the screw drill 11 to achieve single action. Specifically, the screw drill 11 It is a downhole power drilling tool that relies on drilling fluid drive to drive the pilot drill bit 12 to rotate downhole, and does not rely on the drilling rig 2 to drive. Therefore, the drill pipe 9 above the screw drilling tool 11 does not rotate, and the lower pilot drill bit 12 realizes single-action rotation.

As shown in Figures 5 and 6, the pilot drill bit 12 is composed of a pilot drill bit body 1201 and a cutting disk 1202 sleeved outside the pilot drill bit body 1201. The pilot drill bit body 1201 is an integral structure, and the cutting disk 1202 has a reserved Nozzle, the number of cutting discs 1202 is two, and the two cutting discs 1202 are arranged up and down. The cutting surface of the upper cutting disc 1202 faces upward, which is called the upper cutting surface, and the cutting surface of the lower cutting disc 1202 faces downward, which is called the upper cutting surface. Lower cutting surface.

The specific process of using the above-mentioned deep well measuring instrument transporting device to transport underground measuring instruments is as follows:

The lowering stage of the deep well measuring instrument transport device:

The deep well measuring instrument transport device is assembled on the ground. The instrument working cabin 7 is installed between the fixing blocks 13 of the instrument working cabin fixing device 10 and connected together by bolts. One end of the raise drill bit 6 is connected to the drill pipe 9 through threads. on, the other end of the raise bit 6 is connected to the instrument working cabin fixing device 10 through threads, and the end of the instrument working cabin fixing device 10 away from the raise bit 6 is threaded to the screw drilling tool 11; the screw drilling tool 11 is far away from the instrument working cabin. One end of the fixing device 10 is threadedly connected to the pilot drill bit 12;

The installed deep well measuring instrument conveying device is suspended through the derrick 1, and the lowering is started. The mud pump 3 is turned on, and the mud circulation is driven by the mud pump 3. Mud is injected into the drill pipe 9. The mud flows through the deep well measuring instrument conveying device and is passed through the pilot After the drill bit 12 flows out, it returns to the ground from the hole wall gap between the deep well measuring instrument transport device and the wellbore 5, completing the positive cycle, driving the screw drill 11 and the pilot drill bit 12 to rotate in a single motion, and cutting through the downward cutting of the pilot drill bit 12 Use it to break the blockages encountered during the lowering process to ensure smooth lowering;

By continuing the drill pipe 9, the deep well measuring instrument transport device is continuously lowered. When the instrument working cabin 7 is lowered to the designated measurement area, it stops lowering, the mud pump 3 is turned off, and the mud stops circulating. At this time, the downhole inside the instrument working cabin 7 The measuring instrument starts working, and the data measured by the downhole measuring instrument is transmitted to the data processing center 4 through the cable 8 for analysis.

The lifting stage of the deep well measuring instrument transport device:

When the measurement is completed or force majeure is encountered, the instrument working cabin 7 needs to be lifted up, and the drilling rig 2 located at the hole drives the entire deep well measuring instrument transport device to rotate and pull up. At this time, the raise drill bit 6 and the pilot drill bit 12 rotate together, and reverse The drill bit cutting surface of the well drill bit 6 rotates to break the fallen blocks and collapsed rock blocks on the upper hole wall, and the upper cutting surface of the pilot drill bit 12 breaks the fallen blocks and collapsed rock blocks at the lower part of the raise drill bit 6, jointly ensuring smooth lifting.

Furthermore, since the mud is used to drive the screw drilling tool 11 without carrying rock powder, clean water can be used for the mud. During the lowering process, the screw drilling tool 11 and the pilot drill bit 12 rotate in a single motion, and the upper device does not perform Turn around to protect the instrument.

Further, the raise drill bit 6 has a water port 603, and the cable 8 passes through the water port 603 of the raise drill bit 6, which acts as a limiter to prevent the cable 8 from wrapping around the drill pipe 9.

Claims (1)

1. A method of transporting downhole measuring instruments using a deep well measuring instrument transport device, which is characterized in that the deep well measuring instrument transport device used in this method includes: one logging component or at least two serially connected logging components, and a drill pipe (9) , screw drilling tool (11) and pilot drill bit (12). The logging assembly is composed of a raise bit (6), an instrument working cabin (7) and an instrument working cabin fixing device (10). The raising bit (6) and the instrument The working cabin fixing device (10) is coaxially arranged and connected internally. The lower end of the raise drill bit (6) is threadedly connected to the upper end of the instrument working cabin fixing device (10); the instrument working cabin (7) is integrated with downhole measuring instruments. The above-mentioned downhole measuring instrument is connected to the data processing center (4) located on the ground through a cable (8); the instrument working cabin (7) is fixed on the outer wall of the instrument working cabin fixing device (10); one logging component or at least two The serially connected logging assembly is arranged between the drill pipe (9) and the screw drilling tool (11). The drill pipe (9) and the upper end of the raise drill bit (6) close to it are threaded and connected internally. The screw drilling tool (11) is threadedly connected to the lower end of the instrument working cabin fixing device (10) close to it, and is internally connected; the pilot drill bit (12) and the screw drill (11) are coaxially arranged and internally connected, and the pilot drill bit (12) The thread is connected below the screw drilling tool (11); among them, the drill bit cutting surface of the raise drill bit (6) faces the drill pipe (9) located above it; the pilot drill bit (12) has two upper and lower drill bit cutting surfaces, respectively. The cutting surface, the lower cutting surface, the cutting surfaces of the two drill bits face in opposite directions, and the cutting surface of the upper drill bit faces the screw drilling tool (11); The method includes the following steps: Step 1. Assemble the deep well measuring instrument transport device on the ground; Step 2: Hang the assembled deep well measuring instrument transport device through the derrick (1), lower the deep well measuring instrument transport device into the well hole (5); turn on the mud pump (3), and inject mud into the drill pipe (9) , the mud flows inside the deep well measuring instrument conveying device, flows out through the pilot drill bit (12), and then returns to the ground from the gap between the deep well measuring instrument conveying device and the wellbore (5), completing the positive cycle, thereby driving The screw drilling tool (11) and the pilot drill bit (12) rotate in a single motion, and the blockage encountered during the lowering process is broken through the lower cutting surface of the pilot drill bit (12); Step 3: Connect the drill pipe (9) to continuously lower the deep well measuring instrument transport device. When the instrument working cabin (7) is lowered to the designated measurement area, stop lowering and turn off the mud pump (3). At this time, the downhole measuring instruments inside the instrument working cabin (7) start to work, and the data measured by the downhole measuring instruments are passed through the line. Cable (8) is transmitted to the data processing center (4); Step 4: When the measurement is completed or the instrument working cabin (7) needs to be lifted up in an emergency, the drill pipe (9) is clamped by the chuck of the drilling rig (2) located on the surface, and the drill pipe (9) is driven to drive the entire drill pipe (9). The deep well measuring instrument transport device rotates and pulls up. At this time, the raise drill bit (6) rotates together with the pilot drill bit (12). The cutting surface of the raise drill bit (6) rotates to break the fallen blocks and collapsed rock blocks on the upper hole wall. The upper cutting surface of the pilot drill bit (12) breaks the fallen and collapsed rock blocks at the lower part of the raise drill bit (6), completing the lifting action.