A composite ultra-light telemetry intelligent wireline coring drill pipe

Abstract

The present invention discloses a composite ultra-light telecommunication intelligent wireline coring drill pipe, belonging to the technical field of geological exploration drilling equipment and supporting technologies. It includes a drill pipe body and a male connector connected to the drill pipe body. The drill pipe body includes an upper female connector, an upper contact ring assembly, a metal skeleton, a wire, an outer composite carbon fiber layer, an inner composite carbon fiber layer, an outer ceramic composite fiber layer, an inner ceramic composite fiber layer, and a lower female connector. The upper contact ring assembly is arranged on the outer ring of the metal skeleton. The metal skeleton is respectively welded and connected to the two ends of the upper female connector and the lower female connector. The outer composite carbon fiber layer and the outer ceramic composite fiber layer are adhesively bonded to the outside of the metal skeleton in sequence through an adhesive paste, and the inner composite carbon fiber layer and the inner ceramic composite fiber layer are adhesively bonded to the inside of the metal skeleton in sequence through an adhesive paste. The wire is arranged between the outer composite carbon fiber layer and the outer ceramic composite fiber layer. The wireline coring drill pipe provided by the present invention has the characteristics of low density, light weight, non-magnetic property, and telecommunication intelligent guiding property.

Description

Technical Field

[0001] The invention belongs to the technical field of geological exploration drilling equipment and supporting technologies, and in particular relates to a composite ultra-light telecommunication intelligent wireline coring drill pipe. Background Art

[0002] The drill pipe is an important tool for the drill rig to drill holes underground. Its functions are to transmit rotary torque and bit pressure, transport flushing medium (gas or liquid), and take core, etc. At present, there are mainly two types of drill pipes used in drilling, one is the ordinary drill pipe, and the other is the large through-hole thin-walled wireline coring drill pipe. No matter what type of drill pipe, alloy steel is used as the manufacturing material. Due to the material being alloy steel, its large density and heavy mass restrict the lightweight development of drilling equipment; the steel drill pipe metal body has magnetism, which brings difficulties to the rapid and accurate transmission of monitoring parameter signals in the borehole. The key to realizing the lightweight of drilling equipment is to reduce the weight of the drill pipe in the borehole, and the key to the intelligence in the borehole is to solve the problem of rapid signal transmission in the borehole. So far, the technical bottleneck of the ultra-light electric signal intelligent guide drill pipe has not been solved. Moreover, the existing prototypes of carbon fiber material drill pipes have problems such as poor wear resistance, inability to meet the requirements of torsional and compressive strengths, weak bonding between the drill pipe body and the joint part, and low tensile strength, and there is no good solution yet. Therefore, how to solve the lightweight and telecommunication intelligent guidance of the drill pipe is an urgent problem for those skilled in the art. Summary of the Invention

[0003] The purpose of the invention is to provide a composite ultra-light telecommunication intelligent wireline coring drill pipe to solve the problems existing in the above technology, such as the large weight, poor wear resistance, low torsional and compressive strengths of the existing drill pipes, and the difficulty in rapidly transmitting signals in the borehole.

[0004] To achieve the above purpose, the invention provides a composite ultra-light telecommunication intelligent wireline coring drill pipe, which includes a drill pipe body and a male joint connected to the drill pipe body. The male joint is connected to the drill pipe body by threads; lower contact ring assemblies are symmetrically arranged at both ends of the male joint, and a signal line is arranged between the two symmetrically arranged lower contact ring assemblies at both ends.

[0005] The drill pipe body includes an upper female joint, an upper contact ring assembly, a metal skeleton, a conductor, an outer composite carbon fiber layer, an inner composite carbon fiber layer, an outer ceramic composite fiber layer, an inner ceramic composite fiber layer, and a lower female joint; the upper contact ring assembly is arranged on the outer ring of the metal skeleton, and the metal skeleton is respectively welded to both ends of the upper female joint and the lower female joint, the outside of the metal skeleton is bonded to the outer composite carbon fiber layer and the outer ceramic composite fiber layer in turn by an adhesive slurry, and the inside of the metal skeleton is bonded to the inner composite carbon fiber layer and the inner ceramic composite fiber layer in turn by an adhesive slurry, the conductor is arranged between the outer composite carbon fiber layer and the outer ceramic composite fiber layer, and both ends of the conductor are connected to the upper contact ring assembly.

[0006] Preferably, the upper contact ring assembly includes an upper contact ring groove and an upper contact ring disposed inside the upper contact ring groove; the lower contact ring assembly includes a lower contact ring groove and a lower contact ring disposed inside the lower contact ring groove.

[0007] Preferably, the metal skeleton, the upper female joint and the lower female joint are all made of titanium alloy seamless tube material with a wall thickness of 1.0 to 1.5 mm to enhance the torsion and compression resistance of the drill rod and the tensile and wear resistance of the drill rod connection.

[0008] Preferably, the outer composite carbon fiber layer and the inner composite carbon fiber layer are both made of polyacrylonitrile-based carbon fiber, T1000-12K specification material; the outer ceramic composite fiber layer and the inner ceramic composite fiber layer are both made of silicon carbide long fiber specification material, the composite carbon fiber is used to increase the tensile and compressive strength of the drill pipe body, and the ceramic composite fiber is used to increase the wear resistance of the inner and outer layers of the drill pipe body.

[0009] Preferably, the adhesive slurry is high-strength epoxy resin glue.

[0010] Preferably, the wire is made of silver-gold-plated low-resistance material and has a diameter of 0.3 to 0.5 mm.

[0011] Preferably, when the male connector is threadedly connected to the drill pipe body, the upper contact ring is mated with the adjacent lower contact ring, and the conductive wire is connected to the signal wire.

[0012] Preferably, insulating plastic rings are disposed outside the upper contact ring and the lower contact ring.

[0013] Therefore, the present invention adopts a composite ultra-light telecommunication intelligent wireline coring drill pipe with the above structure. The drill pipe body and the joints are all made of ultra-light and non-magnetic materials. The wall thickness of the drill pipe is basically the same as the structural dimensions of wireline coring drill pipes of the same level, which can meet the technical requirements of wireline coring drill pipes, and has the characteristics of low density, light weight, high strength, good wear resistance and corrosion resistance, non-magnetism and telecommunication intelligence guidance. It provides important technical support for promoting the lightening of drilling equipment and the development of intelligent technology for monitoring drilling parameters.

[0014] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional view of a composite ultra-light telecommunication intelligent wireline coring drill pipe of the present invention;

[0016] Figure 2 is a schematic cross-sectional view of the drill pipe body structure of a composite ultra-light telecommunication intelligent wireline coring drill pipe of the present invention;

[0017] Figure 3 is a schematic cross-sectional view of the male joint of a composite ultra-light telecommunication intelligent wireline coring drill pipe of the present invention;

[0018] Figure 4 is a sectional view at A-A of the present invention;

[0019] Among them, 1. upper female joint; 2. upper contact ring; 3. metal skeleton; 4. wire; 5. outer composite carbon fiber layer; 6. inner composite carbon fiber layer; 7. inner ceramic composite fiber layer; 8. outer ceramic composite fiber layer; 9. lower female joint; 10. upper contact ring groove; 11. male joint; 12. signal wire; 13. lower contact ring groove; 14. insulating plastic ring; 15. lower contact ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0021] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. The terms "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0022] Embodiment

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] Please refer to Figures 1-4, a composite ultra-light telecommunication intelligent wireline coring drill pipe, comprising a drill pipe body and a male connector 11 connected to the drill pipe body. The male connector 11 is threadedly connected to the drill pipe body. Two lower contact ring assemblies are symmetrically arranged at both ends of the male connector 11, and a signal wire 12 is arranged between the two lower contact ring assemblies that are symmetric at both ends. The drill pipe body includes an upper female connector 1, an upper contact ring assembly, a metal skeleton 3, a wire 4, an outer composite carbon fiber layer 5, an inner composite carbon fiber layer 6, an outer ceramic composite fiber layer 8, an inner ceramic composite fiber layer 7, and a lower female connector 9. The upper contact ring assembly is arranged on the outer ring of the metal skeleton 3. The metal skeleton 3 is respectively welded to the two ends of the upper female connector 1 and the lower female connector 9. The outer composite carbon fiber layer 5 and the outer ceramic composite fiber layer 8 are successively bonded to the outside of the metal skeleton 3 through an adhesive paste, and the inner composite carbon fiber layer 6 and the inner ceramic composite fiber layer 7 are successively bonded to the inside of the metal skeleton 3 through an adhesive paste. The wire 4 is arranged between the outer composite carbon fiber layer 5 and the outer ceramic composite fiber layer 8, and both ends of the wire 4 are connected to the upper contact ring assembly. The upper contact ring assembly includes an upper contact ring groove 10 and an upper contact ring 2 arranged inside the upper contact ring groove 10. The lower contact ring assembly includes a lower contact ring groove 13 and a lower contact ring 15 arranged inside the lower contact ring groove 13. Insulating plastic rings 14 are arranged outside both the upper contact ring 2 and the lower contact ring 15, with copper metal rings embedded. The wire 4 and the signal wire 12 are spot-welded firmly to the copper metal rings. The metal skeleton 3, the upper female connector 1, and the lower female connector 9 are all made of titanium alloy seamless pipe materials with a wall thickness of 1.0 - 1.5 mm to enhance the torsional resistance, compressive resistance, tensile performance, and wear resistance at the connection of the drill pipe. The outer composite carbon fiber layer 5 and the inner composite carbon fiber layer 6 are both made of polyacrylonitrile-based carbon fiber with a T1000 - 12K specification material. The outer ceramic composite fiber layer 8 and the inner ceramic composite fiber layer 7 are both made of silicon carbide long fiber specification materials. The composite carbon fiber is used to increase the tensile and compressive strength of the drill pipe body, and the ceramic composite fiber is used to increase the wear resistance of the inner and outer surfaces of the drill pipe body. The outer composite carbon fiber layer 5, the inner composite carbon fiber layer 6, the outer ceramic composite fiber layer 8, and the inner ceramic composite fiber layer 7 are respectively pre-woven into composite fiber tubes according to the internal and external dimensions of the metal skeleton 3, then laminated and heated at about 200 °C, and pressed into the inside and outside of the metal skeleton 3 with a special mold and firmly bonded together. After cooling to room temperature, the mold is taken out and the drill pipe body is formed. In order to enhance the bonding force between the metal skeleton 3 and the composite carbon fiber, the inner and outer surfaces of the metal skeleton 3 pipe are pre-turned into small spiral rough surfaces to increase the bonding surface area. The adhesive paste is a high-strength epoxy resin glue with a heat resistance of over 200 °C and a normal temperature consolidation time of 30 - 40 minutes. The wire 4 is made of silver-plated gold low-resistance material with a diameter of 0.3 - 0.5 mm. The connection method of the wire 4 is that insulating plastic rings 14 are sleeved at both ends of the drill pipe body, the insulating plastic rings 14 are embedded with copper metal rings, and the wire 4 is spot-welded to the lower end of the copper metal ring. The two ends of the signal wire 12 buried in the male connector 11 are welded to the lower contact ring 15.After the guide male joint 11 is threadedly connected to the drill pipe body, the upper contact ring 2 is fitted and butted with the adjacent lower contact ring 15, and the wire 4 is connected to the signal wire 12 to intelligently guide and transmit the signal in the hole.

[0025] Therefore, the present invention adopts a composite ultra-light telecommunication intelligent wireline coring drill pipe with the above structure, uses a composite light non-magnetic fiber material to make the drill pipe, and buries wires in the drill pipe to realize the ultra-lightweight of the drill pipe body and the rapid and accurate transmission of the hole parameter monitoring signal; it provides an important technical support for promoting the lightweight of drilling equipment and the development of intelligent technology for drilling parameter monitoring.

[0026] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A composite ultra-light telemetry intelligent wireline coring drill pipe, characterized in that: It includes a drill pipe body and a male connector connected to the drill pipe body. The male connector is threadedly connected to the drill pipe body. Lower contact ring assemblies are symmetrically arranged at both ends of the male connector, and a signal wire is arranged between the lower contact ring assemblies that are symmetric at both ends. The drill pipe body includes an upper female connector, an upper contact ring assembly, a metal skeleton, a wire, an outer composite carbon fiber layer, an inner composite carbon fiber layer, an outer ceramic composite fiber layer, an inner ceramic composite fiber layer, and a lower female connector. The upper contact ring assembly is arranged on the outer ring of the metal skeleton. The metal skeleton is respectively welded to the two ends of the upper female connector and the lower female connector. The outer composite carbon fiber layer and the outer ceramic composite fiber layer are sequentially bonded to the outside of the metal skeleton through an adhesive paste. The inner composite carbon fiber layer and the inner ceramic composite fiber layer are sequentially bonded to the inside of the metal skeleton through an adhesive paste. The wire is arranged between the outer composite carbon fiber layer and the outer ceramic composite fiber layer, and both ends of the wire are connected to the upper contact ring assembly. The metal skeleton, the upper female connector, and the lower female connector are all made of titanium alloy seamless tube material with a wall thickness of 1.0 - 1.5 mm. The outer composite carbon fiber layer and the inner composite carbon fiber layer are both made of polyacrylonitrile-based carbon fiber, with a T1000 - 12K specification material. The outer ceramic composite fiber layer and the inner ceramic composite fiber layer are both made of silicon carbide long fiber specification material. The adhesive paste is a high-strength epoxy resin glue. The wire is made of silver-plated and gold-plated low-resistance material with a diameter of 0.3 - 0.5 mm.

2. The composite ultra-light telecommunication intelligent wireline coring drill pipe according to claim 1, characterized in that: The upper contact ring assembly includes an upper contact ring groove and an upper contact ring arranged inside the upper contact ring groove. The lower contact ring assembly includes a lower contact ring groove and a lower contact ring arranged inside the lower contact ring groove.

3. The composite ultra-light telemetry intelligent wireline coring drill pipe according to claim 2, characterized in that: When the male connector is threadedly connected to the drill pipe body, the upper contact ring is in mating connection with the adjacent lower contact ring, and the wire is connected to the signal wire.

4. A composite ultra-light telemetry intelligent wireline coring drill pipe according to claim 2, characterized in that: Insulating plastic rings are arranged outside both the upper contact ring and the lower contact ring.

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