CN115680623A

CN115680623A - Dynamic recorder for well bottom

Info

Publication number: CN115680623A
Application number: CN202110866564.3A
Authority: CN
Inventors: 张昕; 乔东宇; 王新东; 赵继斌; 李富强; 张磊; 王伟罡; 谷浩; 杨博; 王学成
Original assignee: China National Petroleum Corp; CNPC Xibu Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Xibu Drilling Engineering Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2023-02-03

Abstract

The invention relates to the technical field of petroleum drilling, in particular to a shaft bottom dynamic recorder which comprises a drill bit body and a pressure bearing cylinder, wherein the center of the upper side of the drill bit body is provided with an installation cavity with an upward opening; and a measuring component capable of measuring the engineering parameters of the drill bit during drilling is arranged in the pressure bearing cylinder. The invention has reasonable and compact structure and convenient use, and the measuring assembly is nested in the cavity inside the drill bit, so that the measuring assembly is closer to the drill bit, the measuring process is more stable and accurate, and the invention has the characteristics of rapidness, high efficiency and safety.

Description

Downhole dynamic recorder

Technical Field

The invention relates to the technical field of petroleum drilling, in particular to a downhole dynamic recorder.

Background

Petroleum is an important energy source universal in the world, and with continuous deep petroleum exploration, the stratum structure is more and more complex. In the drilling process, underground drilling engineering parameters have very important significance on safe and efficient drilling. With the development of downhole measurement assemblies, it has become appreciated that near bit engineering parameters contain a large amount of information that reflects the most effective operating conditions of downhole drill bits. With the increase of the well depth, the incidence rate of drilling accidents and complex conditions is higher and higher, the drilling accidents such as drill sticking, cone falling and the like can occur to different degrees, and the occurrence of the accidents is closely related to engineering parameters close to a drill bit.

The application of the underground drilling engineering parameters has important engineering value for underground fault diagnosis, formation analysis, safety prediction and evaluation and basic research of the drilling technology. Therefore, in order to effectively prevent underground engineering accidents and improve the drilling efficiency and economic benefit, the requirements on measurement while drilling instruments are higher and higher in the drilling process. The daily drilling dynamic measurement depends on the measurement while drilling assembly to acquire data, the measurement data only provides data of the measurement while drilling assembly at the position of a bottom hole assembly and cannot provide data of a drill bit for downhole operation, and the vibration signal at the position of the drill bit can be seriously attenuated when the measurement position is away from the drill bit, so that the recorded data is lost or invalid. Therefore, the design of the near-bit measuring assembly has better effect on more clear understanding of the downhole dynamics. In particular, the closer the measurement point is to the drill bit, the better, and in order to obtain accurate drill bit motion, the closer the measurement assembly is to the drill bit. However, domestic measuring assemblies at present mostly increase the measuring nipple and give first place to, measuring assemblies are far away from the drill bit distance, owing to receive the restriction of dog-leg degree when the well drilling, install above the drill bit and be located the length of the nearly drill bit nipple of drilling rod below generally can not the overlength. This will greatly restrict the structural design of near-bit measuring nipple, lead to the measuring information can't effectual reaction creep into the operating condition and the working property of in-process drill bit. Therefore, the use of lengthened measuring short joints is avoided, the space inside the drill bit joint can be fully utilized, and a more reliable measuring assembly is developed to know the underground condition.

In order to solve the problems, a related exploration scheme in the prior art, such as the Chinese patent application No. 201822201066.3, named as a near-bit azimuth gamma measurement while drilling instrument, provides a design of additionally installing a short section, wherein a groove is formed in the surface of the short section, and a corresponding sensor is installed for underground measurement. For example, the chinese patent application No. 202010525525.2 entitled intelligent drill bit for real-time monitoring of drilling cutting force and its working method discloses an intelligent drill bit for real-time monitoring of drilling cutting force, in which one of a row of cutting teeth of a PDC drill bit is changed into a pressure measuring cutting tooth, but this design has a problem of wear and wear of the cutting teeth, which may cause an internal circuit to be inoperative and an effective parameter to be measured. Therefore, the inventor provides a downhole measurement assembly device in the oil drilling process by experience and practice of related industries for many years so as to overcome the defects of the prior art.

Disclosure of Invention

The invention provides a downhole dynamic recorder, which overcomes the defects of the prior art and can effectively solve the problem that engineering parameter measurement of a drill bit is difficult and inaccurate.

The technical scheme of the invention is realized by the following measures: a shaft bottom dynamic recorder is characterized in that an installation cavity with an upward opening is formed in the center of the upper side of a drill bit body, a pressure-bearing cylinder with the upper end positioned above the drill bit body is arranged in the installation cavity, a plurality of wing plates which are vertically distributed are uniformly distributed on the outer side of the middle of the pressure-bearing cylinder along the circumference, a compression ring positioned above the drill bit body is arranged on the outer side of the pressure-bearing cylinder corresponding to the positions of the wing plates, and the compression ring is fixedly installed with the upper side of the drill bit body; and a measuring component capable of measuring engineering parameters of the drill bit during drilling is arranged in the pressure bearing cylinder.

The following are further optimization or/and improvement on the technical scheme of the invention:

the pressure bearing cylinder can be internally provided with an electronic cavity with a downward opening, the electronic cavity is internally provided with a battery pack and an electronic cylinder from top to bottom in sequence, a measuring assembly is arranged in the electronic cylinder, the bottom of the pressure bearing cylinder is provided with a plug, the measuring assembly comprises a measuring sensor and a control unit, and the control unit comprises a microprocessor and a data storage device.

At least one O-shaped sealing ring can be arranged between the plug and the pressure-bearing cylinder at intervals from top to bottom.

The top of the drill bit body can be provided with a plurality of threaded holes, the position, corresponding to the threaded holes, on the compression ring is provided with a through hole, and a screw penetrates through the through hole to fixedly connect the top of the drill bit body with the compression ring.

Above-mentioned pterygoid lamina upper end all can be equipped with the location arch, corresponds the clamp ring downside of every location bellying position and all is equipped with positioning groove, and the location arch is located the positioning groove who corresponds the position.

The number of the wing plates can be 2 to 5.

The invention has reasonable and compact structure and convenient use, on one hand, the pressure-bearing cylinder for bearing the measuring component is nested in the cavity inside the drill bit, thereby leading the measuring component to be closer to the drill bit, not influencing the build-up rate in the drilling process, but also effectively obtaining the engineering parameters of the drill bit to reflect the working state and the working performance of the drill bit in the drilling process; on the other hand, the pressure bearing cylinder in the mounting cavity is fixed by the compression ring, so that the measurement process is more stable and accurate; it has the characteristics of rapidness, high efficiency and safety.

Drawings

FIG. 1 is a schematic front view of the preferred embodiment of the present invention.

Fig. 2 is a perspective exploded view of fig. 1.

Fig. 3 is a schematic sectional structural view of the pressure-bearing cartridge shown in fig. 1.

The codes in the figures are respectively: 1 is the drill bit body, 2 is a pressure-bearing cylinder, 3 is the pterygoid lamina, 4 is the clamp ring, 5 is the through-hole, 6 is the screw, 7 is the end cap, 8 is an electron section of thick bamboo, 9 is the group battery, 10 is the measurement element, 11 is the location arch.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout of the drawings in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention is further described below with reference to the following examples and figures:

as shown in the attached drawings 1, 2 and 3, the downhole dynamic recorder comprises a drill bit body 1 and a pressure bearing cylinder 2, wherein an installation cavity with an upward opening is arranged in the center of the upper side of the drill bit body 1, the pressure bearing cylinder 2 with the upper end positioned above the drill bit body 1 is arranged in the installation cavity, a plurality of wing plates 3 which are vertically distributed are uniformly distributed on the outer side of the middle part of the pressure bearing cylinder 2 along the circumference, a pressing ring 4 positioned above the drill bit body 1 is arranged on the outer side of the pressure bearing cylinder 2 corresponding to the position of the wing plates 3, and the pressing ring 4 is fixedly installed with the upper side of the drill bit body 1; the pressure bearing cylinder 2 is internally provided with a measuring assembly 10 capable of measuring engineering parameters of a drill bit during drilling.

According to the demand, set up measuring component 10 in 1 internally mounted cavity of drill bit body through pressure-bearing cylinder 2, make measuring component 10 be closer to the drill bit to obtain more effective engineering parameter, the operating condition and the working property of accurate reaction well drilling in-process drill bit, and measuring component 10 low power dissipation, it is longe-lived. Meanwhile, the pressure bearing barrel 2 is arranged in the installation cavity, and the influence on the build-up rate caused by the fact that a measuring short section is additionally arranged above the drill bit is avoided. The pterygoid lamina 3 in the 2 outsides of pressure-bearing section of thick bamboo both had been used for stabilizing the position of pressure-bearing section of thick bamboo 2, also did benefit to the flow of drilling fluid, can fix pressure-bearing section of thick bamboo 2 in the installation cavity through clamp ring 4. During the use, can be as required, installation cavity internal diameter size is greater than 3 outside edge places circumference diameters of pterygoid lamina, and the height is the same with the perpendicular distance of 2 bottoms of pressure-bearing section of thick bamboo to 3 upper limb of pterygoid lamina in the cavity, and clamp ring 4 center can be designed with the trompil that corresponds with 2 upper ends of pressure-bearing section of thick bamboo, and 2 upper ends of pressure-bearing section of thick bamboo are worn out from the trompil, and the trompil diameter is greater than 2 diameters of pressure-bearing section of thick bamboo and is less than 3 outside circumference diameters of pterygoid lamina for pressure-bearing section of thick bamboo 2 is more stable in the installation cavity. The tool while drilling is used for the oil drilling process, needs to go deep into the operation of several kilometers at the bottom of the earth, and the condition is very complicated, and the effect of stress such as pressurized, torsion among the drilling process, measuring component 10 atress transform is obvious in the installation cavity, and through the fixed of clamp ring 4, messenger measuring component 10 is more stable, more is favorable to protecting measuring component 10, and measured data is more accurate. And a measuring component for measuring engineering parameters such as rotating speed, vibration and the like on the drill bit during drilling is arranged in the pressure bearing cylinder.

The downhole dynamic recorder can be further optimized or/and improved according to the actual needs:

as shown in fig. 1, 2 and 3, an electronic cavity with a downward opening is arranged in the pressure bearing cylinder 2, a battery pack 9 and an electronic cylinder 8 are sequentially arranged in the electronic cavity from top to bottom, a measuring component 10 is arranged in the electronic cylinder 8, a plug 7 is arranged at the bottom of the pressure bearing cylinder 2, the measuring component 10 comprises a measuring sensor and a control unit, and the control unit comprises a microprocessor and a data storage device. When the measuring component 10 is used, the measuring component 10 is placed in the electronic cylinder 8, so that the measuring component 10 is closer to a drill bit, and therefore more effective engineering parameters are obtained, and the working state and the working performance of the drill bit in the drilling process are accurately reflected. The measuring sensor can select sensors such as rotating speed, vibration and the like to be used for measuring engineering parameters such as rotating speed, vibration and the like on the drill bit during drilling. And the microprocessor and the data storage device can be used for processing and storing the downhole data.

As shown in fig. 1, 2 and 3, at least one O-ring is arranged between the plug 7 and the pressure-bearing cylinder 2 from top to bottom. At least one O-shaped sealing ring is arranged between the plug 7 and the pressure-bearing cylinder 2, so that the pressure-bearing cylinder 2 has good sealing performance, and the influence of drilling fluid entering the pressure-bearing cylinder 2 on the service life and the accuracy of the measuring assembly 10 can be effectively avoided during use.

As shown in fig. 1, 2 and 3, the top of the drill bit body 1 is provided with a plurality of threaded holes, the clamp ring 4 is provided with through holes 5 at positions corresponding to the threaded holes, and screws 6 penetrate through the through holes 5 to fixedly connect the top of the drill bit body 1 with the clamp ring 4. In the using process, the compression ring 4 and the drill bit can be tightly connected through the screw 6 and firmly fixed.

As shown in fig. 1, 2 and 3, the upper end of the wing plate 3 is provided with a positioning protrusion 11, the lower side of the clamp ring 4 corresponding to the position of each positioning protrusion 11 is provided with a positioning groove, and the positioning protrusion 11 is located in the positioning groove corresponding to the position. During the use, the location arch 11 of pterygoid lamina 3 upper end cooperatees with the positioning groove of clamp ring 4 downside, makes to bear and presses a section of thick bamboo 2 more stable on the horizontal direction to can prevent to bear and press a section of thick bamboo 2 at the installation cavity internal rotation.

As shown in fig. 1, 2 and 3, the number of the wing plates 3 is 2 to 5. The quantity and the position of pterygoid lamina 3 correspond with the positioning groove of clamp ring 4 downside, and bearing and pressing a section of thick bamboo 2 and inserting the protruding 11 pressfittings in the location of positioning groove and pterygoid lamina 3 on the clamp ring 4 in the cavity during use, it is fixed with clamp ring 4 with screw 6, simple to operate, the location is accurate.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims

1. A shaft bottom dynamic recorder is characterized by comprising a drill bit body and a pressure bearing cylinder, wherein the center of the upper side of the drill bit body is provided with an installation cavity with an upward opening, the installation cavity is internally provided with the pressure bearing cylinder with the upper end positioned above the drill bit body, the outer side of the middle part of the pressure bearing cylinder is uniformly provided with a plurality of wing plates which are vertically distributed along the circumference, the outer side of the pressure bearing cylinder corresponding to the positions of the wing plates is provided with a compression ring positioned above the drill bit body, and the compression ring is fixedly installed with the upper side of the drill bit body; and a measuring component capable of measuring the engineering parameters of the drill bit during drilling is arranged in the pressure bearing cylinder.

2. The bottom hole dynamic recorder of claim 1, wherein the pressure-bearing cylinder is provided with an electronic cavity with a downward opening, the electronic cavity is provided with a battery pack and an electronic cylinder from top to bottom, the electronic cylinder is provided with a measuring assembly, the bottom of the pressure-bearing cylinder is provided with a plug, the measuring assembly comprises a measuring sensor and a control unit, and the control unit comprises a microprocessor and a data storage device.

3. The downhole dynamic recorder of claim 2, wherein the plug and the pressure bearing cylinder are spaced apart from one another from top to bottom by at least one O-ring seal.

4. The downhole dynamic recorder of claim 1, 2 or 3, wherein the top of the bit body has a plurality of threaded holes, the clamp ring has through holes at positions corresponding to the threaded holes, and screws pass through the through holes to fixedly connect the top of the bit body to the clamp ring.

5. The downhole dynamic recorder of claim 1, 2 or 3, wherein the upper ends of the wing plates are provided with positioning protrusions, the lower sides of the compression rings corresponding to the positions of the positioning protrusions are provided with positioning grooves, and the positioning protrusions are located in the positioning grooves corresponding to the positions.

6. The downhole dynamic recorder of claim 4, wherein the upper ends of the wings are provided with positioning protrusions, the lower sides of the compression rings corresponding to the positions of the positioning protrusions are provided with positioning grooves, and the positioning protrusions are located in the positioning grooves corresponding to the positions.

7. A downhole dynamic recorder according to claim 1 or 2 or 3 or 6, wherein the number of wings is 2 to 5.

8. A downhole dynamics recorder according to claim 4, characterized in that the number of wings is 2 to 5.

9. A downhole dynamics recorder according to claim 5, characterized in that the number of wings is 2 to 5.