WO2020034366A1

WO2020034366A1 - Automatic starting mechanism for core drilling rig

Info

Publication number: WO2020034366A1
Application number: PCT/CN2018/109036
Authority: WO
Inventors: 陈领; 谢和平; 高明忠; 张志龙; 张茹; 张泽天; 鲁义强; 李聪; 何志强; 华夏; 明传剑; 彭高友; 陆彤
Original assignee: 四川大学; 深圳大学
Priority date: 2018-08-13
Filing date: 2018-09-30
Publication date: 2020-02-20
Also published as: CN109025874A; CN109025874B

Abstract

Disclosed is an automatic starting mechanism for a core drilling rig, comprising a liquid passage central rod (14), a liquid passage starting module, an outer cylinder (22) and an outer cylinder unlocking module. The liquid passage starting module comprises a locking body (11), a locking rod (12), a shear pin (13), a liquid passage A (31), a liquid passage B (132) and a liquid passage C (33), and the liquid passage B (132) communicating with the liquid passage C (33); the outer cylinder unlocking module comprises a connecting pipe (21), the outer cylinder (22) and a locking pin (23), the rear end of the connecting pipe (21) being connected to the locking body (11), the rear end of the locking pin (23) being connected to the locking rod (12); before starting, the shear pin (13) fixes the locking rod (12) in the locking body (11), the liquid passage A (31) is separated from the liquid passage B (132), a pin (24) fixes the outer cylinder (22) outside the connecting pipe (21), and after starting, the pin (24) is cut off, the locking rod (12) moves forward, and the liquid passage A (31) communicates with the liquid passage B (132), the pin (24) releases constraints on the outer cylinder (22). The automatic starting mechanism for the core drilling rig locks working components and blocks the liquid flow passages before starting, and releases axial constraints on the working components and provides hydraulic pressure to the working components after starting.

Description

Core starting rig automatic starting mechanism

Technical field

The invention relates to a drilling coring system, in particular to an automatic starting mechanism of a coring rig.

Background technique

In the process of oilfield exploration, cores are important data for discovering oil and gas layers and studying formations, oil layers, reservoirs, caps, structures, etc. By observing and studying cores, you can directly understand the lithology and physical properties of underground rocks. And oily, gas, aquatic characteristics. After the oilfield is put into development, it is necessary to further study and understand the sedimentary characteristics of the reservoir through the core, the physical properties, pore structure, wettability, relative permeability, lithofacies of the reservoir, physical simulation of the reservoir, and the law of water flooding in the reservoir; Water flooding characteristics of the reservoirs in the development stage and in different water-cutting stages, to clarify the distribution of remaining oil, and to provide scientific basis for the design of oilfield development schemes, layer system, well pattern adjustment, and infill wells.

Coring is the use of special coring tools to pull underground rocks into the ground during drilling. This type of rock is called a core, which can be used to determine various properties of the rock and intuitively study the underground structure. And rock sedimentary environment, and understand the fluid properties. In the process of mineral exploration and development, it is necessary to carry out drilling according to the stratigraphic level and depth of the geological design, run core tools into the well, and drill out the rock samples.

The underground temperature is high and electrical equipment cannot be used. Hydraulic equipment is often used. Before the hydraulic equipment is started, the liquid flow channel must be blocked. After startup, the axial constraint on the working component must be lifted to move the working component forward and the liquid flow channel. Unblocked, providing hydraulic pressure to working parts, driving hydraulic motors, and cold drilling rigs.

Summary of the Invention

The invention aims to provide an automatic starting mechanism for a core drilling rig. Before starting, the working component is locked, the liquid flow path is blocked, and after starting, the axial constraint on the working component is released to provide hydraulic pressure to the working component.

In order to achieve the above objective, the technical solution adopted by the present invention is as follows:

The invention discloses an automatic starting mechanism for a core drilling rig, which includes a central rod, a liquid channel starting module, an outer cylinder and an outer cylinder unlocking module. The central rod passes through the inner channel of the liquid channel activating module and the outer cylinder unlocking module, and the liquid channel activating module is in the outer cylinder. Behind the unlocking module and the outer cylinder, the liquid channel activation module is connected to the outer cylinder unlocking module.

Liquid channel activation module: includes a lock body, a lock lever, a shear pin, and a center rod. The lock body penetrates back and forth, and the lock body is a lock section, a seal section A, and a liquid channel section from back to front. The pin hole and the shear pin hole are through holes. The lock lever penetrates back and forth, the lock lever is in the lock body, and the lock lever is connected section, outflow section, seal section B, and inflow section from back to front, and there are shear pins on the outer wall of the connection section. Groove, the length of the shear pin is greater than the depth of the shear pin hole, the shear pin is in the shear pin hole and the shear pin groove, an outflow hole is opened in the side wall of the outflow section, and an inflow hole is opened in the side wall of the inflow section, and the center rod is in the In the locking rod, the inner diameter of the sealing section A is equal to the outer diameter of the sealing section B, the inner diameter of the liquid channel section is larger than the outer diameter of the locking rod, and the inner diameters of the connecting section, outflow section and inflow section are larger than the outer diameter of the center rod, and the seal The inner diameter of the segment B is equal to the outer diameter of the center rod. The axial distance from the front end of the seal segment A to the rear end of the lock body is smaller than the axial distance from the front end of the seal segment B to the rear end of the lock body. The axial distance from the opening of the outer wall of the hole to the rear end of the lock body is smaller than the rear end of the liquid channel section to the rear end of the lock body Before the shear pin is cut, the outflow hole is sealed in the sealing section A, and the front end of the liquid channel A is sealed. After the shear pin is cut, the outflow hole is in the liquid channel section, and the liquid channel A and the liquid channel B communicate through the outflow hole;

Outer cylinder unlocking module: including connecting tube, outer cylinder and lock pin, the rear end of the connecting tube is connected with the lock body, the rear end of the lock pin is connected with the lock rod, the center rod passes through the inner cavity of the lock pin, and the outer diameter of the center rod is smaller than the inner diameter of the lock pin The central rod, the connecting tube, the outer tube and the lock pin are coaxial, the lock pin is in the connecting tube, the outer diameter of the front section of the connecting tube is smaller than the inner diameter of the outer tube, the side wall of the front section of the connecting tube has an unlocking hole, and the outer wall of the lock pin has a groove A, The inner wall of the outer cylinder has a groove B, and further includes a pin whose length is greater than the depth of the unlocking hole, and the pin is in the unlocking hole. The outer end of the pin is chamfered and / or the side of the groove B is a slope, and the width of the groove A Not less than the width of the inner end of the pin, and the width of the groove B not less than the width of the outer end of the pin. Before the shear pin is cut, the front end of the connecting tube is in the outer cylinder, the pin is in front of the groove A, and the inner end surface of the pin slides with the outer wall of the lock pin. The end is embedded in the groove B. After the shear pin is cut, the lock lever moves the lock pin forward. The inner end of the pin is embedded in the groove A. The distance from the inner end of the pin to the inner wall of the outer cylinder is greater than the length of the pin.

The inner wall of the connecting section, the inner wall of the outflow section, and the rear end of the sealing section B and the outer wall of the center rod form a liquid channel A, the inner wall of the lock rod and the outer wall of the lock rod form a liquid channel B, and the inner wall of the lock rod and the outer wall of the center rod form a liquid channel C. The inner wall of the pin and the outer wall of the center rod form a liquid channel D. The liquid channel B communicates with the liquid channel C through the inflow hole, the liquid channel C communicates with the liquid channel D, the liquid channel A communicates with the liquid supply equipment, and the front of the liquid channel D communicates with the working equipment. Before the shear pin is cut, the outflow hole is sealed at the front end of the liquid channel A. After the shear pin is cut, the outflow hole is in the liquid channel section, and the liquid channel A and the liquid channel B communicate through the outflow hole.

Further, the inner diameter of the locking section is larger than the inner diameter of the sealing section A, the outer wall of the connecting section has a convex portion, the outer diameter of the convex portion is greater than the inner diameter of the sealing section A, and the outer diameter of the front of the convex portion of the connecting section is equal to the inner diameter of the sealing section A, so The shear pin groove is in the raised portion.

Further, it also includes a lock nut, the lock nut is behind the lock body, the lock nut penetrates back and forth, the center rod passes through the inner cavity of the lock nut, the front end of the lock nut is threadedly connected to the back end of the lock body, and the shear pin hole is opened at At the thread at the rear end of the lock body, the radial distance from the inner wall of the lock nut to the bottom of the shear pin groove is not less than the length of the shear pin.

Further, the lock nut includes a fixed section and a threaded section. The outer diameter of the convex portion behind the connecting section is smaller than the inner diameter of the fixed section and smaller than the outer diameter of the raised portion. The inner diameter of the threaded section is equal to the outer diameter of the locking section.

Further, the locking nut is provided with a locking hole A in the axial direction, the locking hole A is a through hole, the rear end face of the lock body has a locking hole B, the locking hole B is a blind hole, and the locking hole A and The locking hole B is matched and further includes a fixing screw, the length of the fixing screw is greater than the depth of the locking hole A, the fixing screw is in the locking hole A, and the front end of the fixing screw passes through the locking hole A and is embedded in the locking hole B.

Further, the outflow holes are inclined forward from the inside to the outside. There are a plurality of outflow holes. The plurality of outflow holes are evenly distributed along the circumference in the same axial position. The inflow holes are multiple and the inflow holes are distributed back and forth on different sides. There are multiple unlocking holes, and the multiple unlocking holes are evenly distributed along the circumference at the same axial position.

Further, the pin includes a nail head and a nail body, the nail head is on the inside, and the unlocking hole is provided with a nail head section and a nail body section. The nail head section includes an inner diameter not less than the outer diameter of the nail head and the nail body section. The inner diameter is not less than the outer diameter of the nail body, the length of the nail head is less than the depth of the nail head section, and the length of the nail body is greater than the depth of the nail body section.

Further, the angle between the chamfer of the outer end of the pin and the radial section and the angle between the side of the groove B and the radial section are mutually redundant.

Further, the connecting section is threadedly connected to the outflow section, the sealing section B and the inflow section are welded, the lock lever is screwed to the lock pin, and the lock body is threaded to the connecting pipe.

Further, after the shear pin is cut, the lock lever is moved forward, the shear pin head is in the shear pin hole, and the shear pin tail is in the shear pin slot. The shear pin head includes a large head and a small head, the large head faces outward, and the large head has an outer diameter greater than The outer diameter of the small head, the shear pin hole includes an outer section and an inner section, the diameter of the outer section is not smaller than the outer diameter of the big head of the shear pin head, the diameter of the inner section is not smaller than the outer diameter of the small head of the shear pin head, and the inner diameter is smaller than the outer diameter of the big head, The depth of the outer section is not less than the length of the big head, and the sum of the length of the small head and the length of the shear pin tail is greater than the depth of the inner section.

The invention has the following beneficial effects:

1. Before starting, the shear pin fixes the lock lever to the lock body, the outflow hole is in the sealing section A, the opening of the outer wall of the outflow hole is sealed, the liquid cannot flow out, the connecting pipe is connected to the lock body, and the front end of the pin is embedded in the groove B , The outer cylinder is locked on the connecting pipe, when the hydraulic pressure provided by the rear mud pump reaches the starting value, the shear pin is broken, the lock lever is moved forward, and the liquid flows through the outer wall of the center rod and the inner wall of the connection section and the inner wall of the pressure relief section. The channel enters the liquid flow channel formed by the inner wall of the liquid channel section and the outer wall of the inflow section through the outflow hole. The liquid flow channel formed by the inflow hole flowing into the outer wall of the center rod and the inner wall of the inflow section communicates with the front hydraulic motor and the drill bit, and starts the hydraulic motor. Cooling the drill bit, the lock rod moves forward to drive the lock pin forward, so that the groove A is directly opposite the unlock hole, the outer barrel gravity is forward, the contact surface between the groove B and the outer end of the pin is inclined, and the pin is squeezed into the groove A Inside and outside the constraint of the outer cylinder, the front end of the outer cylinder is connected with working parts such as the hydraulic motor rotor and the drill bit, so that the drill bit moves forward;

2. The outer diameter of the protrusion is larger than the inner diameter of the sealing section A, and the forward movement distance of the lock lever is limited so that the lock lever can no longer move forward after reaching the working position;

3. Set a lock nut. The lock nut is threadedly connected to the lock body. The connection section and the outflow section are threaded to facilitate installation and replacement of shear pins.

4. Locking hole A, locking hole B and fixing screws cooperate to limit the circumferential rotation;

5. The shear pin head includes big head and small head, and the shear pin hole includes outer section and inner section, which can restrict the shear pin to move radially inward;

6. The design of nail head, nail body, nail head section and nail body section can prevent the pin from sliding out of the unlocking hole.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram before the liquid channel starting module is started;

FIG. 2 is a schematic diagram after the liquid channel starting module is started;

3 is a schematic diagram before the outer cylinder unlocking module is started;

4 is a schematic diagram after the outer cylinder unlocking module is started;

In the picture: 11-lock body, 111-locking section, 1111-shear pin hole, 112-sealing section A, 113-fluid section, 114-locking hole B, 12-locking rod, 121-connecting section, 1211- Shear pin groove, 1212-projection, 122-outflow section, 1221-outflow hole, 123-seal section B, 124-inflow section, 1241-inflow hole, 13-shear pin, 14-center rod, 15-locking Nut, 151-fixed section, 152-threaded section, 153-locking hole A, 154-fixing screw, 21-connecting pipe, 211-unlocking hole, 22-outer cylinder, 221-groove B, 23-lock pin, 231-groove A, 24-pin, 31-fluid channel A, 32-fluid channel B, 33-fluid channel C, 34-fluid channel D.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings.

The automatic starting mechanism of the core drilling rig disclosed in the present invention includes a liquid channel starting module and an outer cylinder unlocking module;

As shown in Figures 1 and 2, the liquid channel activation module includes a lock body 11, a lock rod 12, a shear pin 13, and a center rod 14, the lock body 11 penetrates back and forth, and the lock body 11 is a lock section 111 and a seal from back to front. Section A112 and liquid channel section 113, the side wall of the locking section 111 has a shear pin hole 1111, the shear pin hole 1111 is a through hole, the length of the shear pin 13 is greater than the depth of the shear pin hole 1111, the lock lever 12 penetrates forward and backward, and the lock lever 12 is in the lock body Within 11, the lock lever 12 is connected from the back to the front in order to connect the section 121, the outflow section 122, the seal section B123 and the inflow section 124, the connection section 121 is threaded to the outflow section 122, the seal section B123 and the inflow section 124 are welded, and the connection section 121 The outer wall has a shear pin groove 1211, the shear pin groove 1211 is an annular groove, the shear pin 13 is in the shear pin hole 1111 and the shear pin groove 1211, the outflow section 122 has an outflow hole 1221 on the side wall, and the inflow section 124 has an inflow hole on the side wall. 1241, the outflow holes 1221 are inclined forward from the inside to the outside. There are a plurality of outflow holes 1221. Multiple outflow holes 1221 are uniformly distributed along the circumference in the same axial position. There are multiple inflow holes 1241. The inflow holes 1241 are distributed back and forth on different sides. The inner diameter of the locking section 111 is larger than the inner diameter of the sealing section A112, and the outer wall of the connecting section 121 has a convex portion 1212. The outer diameter of the convex portion 1212 is larger than the inner diameter of the sealing section A112. The outer diameter of the convex portion 1212 of the connecting section 121 is equal to the inner diameter of the sealing section A112. The shear pin groove 1211 is in the convex portion 1212, the center rod 14 is in the locking rod 12, and the sealing section A112. The inner diameter is equal to the outer diameter of the sealing section B123, the inner diameter of the liquid channel section 113 is larger than the outer diameter of the locking rod 12, the inner diameter of the connecting section 121, the outflow section 122, and the inflow section 124 is larger than the outer diameter of the center rod 14, and the inner diameter of the sealing section B123 is equal to the outer diameter of the center rod 14. The axial distance from the front end of the seal section A112 to the rear end of the lock body 11 is smaller than the axial distance from the front end of the seal section B123 to the rear end of the lock body 11. The shear pin 13 penetrates the shear pin hole 1111 into the shear pin groove 1211, and the outer wall of the outflow hole 1221 opens to The axial distance from the rear end of the lock body 11 is smaller than the axial distance from the rear end of the liquid channel section 113 to the rear end of the lock body 11, and further includes a lock nut 15 behind the lock body 11, the lock nut 15 penetrating back and forth, and a center The rod 14 passes through the inner cavity of the lock nut 15, the front end of the lock nut 15 is threadedly connected with the rear end of the lock body 11, the shear pin hole 1111 is opened at the thread at the rear end of the lock body 15, the inner wall of the lock nut 15 reaches the bottom of the shear pin groove 1211 The radial distance is not less than the length of the shear pin 13, and the lock nut 15 includes a fixed 151 and thread section 152, the outer diameter of the convex section 1212 of the connecting section 121 is smaller than the inner diameter of the fixed section 151 and the outer diameter of the convex section 1212, the inner diameter of the threaded section 152 is equal to the outer diameter of the locking section 111, and the lock nut 15 is axially locked. Hole A153, locking hole A153 is a through hole, there is a locking hole B114 at the rear end of the lock body 11, the locking hole B114 is a blind hole, the locking hole A153 is matched with the locking hole B114, and it also includes a fixing screw 154, a fixing screw 154 The length is greater than the depth of the locking hole A153. The fixing screw 154 is in the locking hole A153. The front end of the fixing screw 154 passes through the locking hole A153 and is embedded in the locking hole B114. After starting, the locking lever 12 moves forward, the shear pin 13 cuts, cuts The pin head is in the shear pin hole 1111, and the shear pin tail is in the shear pin groove 1211. The shear pin head includes a large head and a small head, the large head is outward, and the outer diameter of the large head is greater than the outer diameter of the small head. The shear pin hole 1111 includes an outer section and an inner section. The diameter of the outer section is not less than the outer diameter of the big head of the shear pin head. The diameter of the inner section is not less than the outer diameter of the small head of the shear pin head. The sum is greater than the depth of the inner segment;

As shown in FIG. 3 and FIG. 4, the outer cylinder unlocking module includes a connecting pipe 21, an outer cylinder 22, and a lock pin 23. The rear end of the connection pipe 21 is threadedly connected to the lock body 11, and the rear end of the lock pin 23 is threadedly connected to the lock lever 12. The central rod 14 passes through the inner cavity of the locking pin 23, and the outer diameter of the central rod 14 is smaller than the inner diameter of the locking pin 23. The central rod 14, the connecting pipe 21, the outer cylinder 22, and the locking pin 23 are coaxial, and the locking pin 23 is connected in the connecting pipe 21. The outer diameter of the front section of the tube 21 is smaller than the inner diameter of the outer tube 22. There are unlocking holes 211 on the side wall of the connecting section of the tube 21. There are multiple unlocking holes 211. Multiple unlocking holes 211 are evenly distributed along the circumference in the same axial position. The outer wall of the locking pin 23 is concave. Groove A231, groove B221 on the inner wall of outer cylinder 22, groove A231 and groove B221 are both annular grooves, and also include pins 24, the length of which is greater than the depth of unlocking hole 211, pin 24 in unlocking hole 211, and the outer end of pin 24 For chamfering, the side of groove B221 is beveled. The angle between the outer end of pin 24 and the radial section and the angle between the side of groove B221 and the radial section are redundant. The width of groove A231 is not less than the width of the inner end of pin 24. The width of the groove B221 is not less than the width of the outer end of the pin 24. The pin 24 includes a nail head and a nail body, and the nail head is on the inside. The hole 211 is divided into a nail head section and a nail body section. In the nail head section, the inner diameter of the nail head section is not less than the outer diameter of the nail head, the inner diameter of the nail body section is not less than the outer diameter of the nail body, the length of the nail head is less than the depth of the nail head section, and the length of the nail body. Greater than the depth of the nail body, after starting, the inner end of the pin 24 is embedded in the groove A231, and the distance from the inner end surface of the pin 24 to the inner wall of the outer cylinder 22 is greater than the length of the pin 24;

The inner wall of the connecting section 121, the inner wall of the outflow section 122, and the rear end of the sealing section B123 form a liquid channel A31 with the outer wall of the center rod 14, the inner wall of the lock body 11 and the outer wall of the lock rod 12 form a liquid channel B32. The liquid channel C33 is enclosed, and the inner wall of the lock pin 23 and the outer wall of the center rod 14 form a liquid channel D34. The liquid channel B32 communicates with the liquid channel C33 through the inflow hole 1241, the liquid channel C33 communicates with the liquid channel D34, and the liquid channel A31 communicates with the rear Equipment, front of liquid channel D34 communicates with working equipment.

Before starting, the shear pin 13 penetrates the shear pin hole 1111 and is inserted into the shear pin groove 1211. The lock lever 12 is fixed in the lock body 11 through the shear pin 13. The axial distance from the outer wall of the outflow hole 1221 to the rear end of the lock body 11 is less than the liquid channel section. The axial distance from the rear end of 113 to the rear end of lock body 11, the outer wall opening of the outflow hole 1221 is closed by the sealing section A112, and the liquid cannot flow forward. The front end of the connecting tube 21 is in the outer cylinder 22, the pin 24 is in front of the groove A231, and the pin 24 is inside. The end face slides with the outer wall of the locking pin 23, the outer end of the pin 24 is embedded in the groove B221, the outer cylinder 22 is fixed outside the connecting pipe 21 by the pin 24, and the hydraulic pressure provided by the rear mud pump impacts the rear end of the lock lever 12, Cut off the shear pin 13, the shear pin 13 is broken into the shear pin head and the shear pin tail, the shear pin head is in the shear pin hole 1111, the shear pin tail is in the shear pin groove 1211, the shear pin head includes the big head and the small head, and the big head faces In addition, the outer diameter of the big head is larger than the outer diameter of the small head. The shear pin hole 1111 includes the outer section and the inner section. The hole diameter of the outer section is not smaller than the outer diameter of the big head of the shear pin head. Less than the outer diameter of the big head, the depth of the outer section is not less than the length of the big head, the sum of the length of the small head and the length of the shear pin tail Greater than the depth of the inner section, the locking rod 12 moves forward, the axial distance from the outer wall of the outflow hole 1221 to the rear end of the lock body 11 is greater than the axial distance from the rear end of the liquid passage section 113 to the rear end of the lock body 11, and the liquid passage A31 and the liquid passage B32 pass The outflow hole 1221 communicates with the liquid passage A31, the liquid passage B32, the liquid passage C33, and the liquid passage D34. The hydraulic energy provided by the liquid supply device behind the liquid passage A31 is transmitted through the liquid passage A31, the liquid passage B32, the liquid passage C33, and the liquid passage D34. To the front hydraulic motor and drill bit, drive motor, cooling drill bit, the lock rod 12 drives the lock pin 23 forward, the inner end of the pin 24 slides with the outer wall of the lock pin 23, and when the groove A231 slides forward to the same axis as the pin 24 In the position, the outer cylinder 22 uses its own gravity to generate forward pressure. The contact surface between the groove B221 and the pin 24 is an inclined surface. The groove B221 presses the inclined surface of the pin 24. The pin 24 exits from the groove B221 and is pressed into the groove. In A231, the restriction of the outer cylinder 22 is released, and the outer cylinder drives the working parts connected forward to move forward.

The inner diameter of the connecting section 121 is 36mm, the total length is 106mm, the outer diameter of the convex section 1212 is 56mm, the outer diameter of the front and rear of the convex section 1212 of the connecting section 121 is 50mm, the shear pin groove 1211 is 6mm deep, and the distance between the rear end of the convex section 1212 The rear end of the connecting section 121 is 15mm, the front end of the shear pin groove 1211 is 27.8mm away from the rear end of the connecting section 121, the shear pin groove 1211 is 5.5mm wide, the front end of the shear pin groove 1211 is 73mm from the front end of the connecting section 121, and the side wall of the connecting section 121 has an aperture. It is a 8mm through hole, the center of the through hole is 65mm from the front end of the connecting section 121, the outer diameter of the thread at the front end of the connecting section 121 is 43mm, the thread is M45 × 1.5mm, and the length between the connecting section 121 and the outflow section 122 is 39mm.

Outflow section 122 and sealing section B123 both have an outer diameter of 50mm, outflow section 122 has an inner diameter of 36mm, outflow hole 1221 has an aperture of 8mm, the angle between the outflow hole 1221 and the axial direction is 45 °, and the front end of the outer wall opening of the outflow hole 1221 is behind the outflow section 122 The end is 152mm. There are 6 outflow holes 1221. The total length of outflow section 122 and seal section B123 is 196mm. The inner diameter of seal section B123 is 25mm. The inflow angle of the inflow holes 1241 is 90 ° in the circumferential direction. The distance from the center of the four inflow holes 1241 to the rear end of the inflow section 124 is 39mm, 55mm, 71mm, and 87mm, the inner diameter of the inflow section 124 is 40.5mm, and the outer diameter of the inflow section 124 is 44.5mm, the outer diameter of the center rod 14 is 25mm.

The locking section 111 has an outer diameter of 82mm and an inner diameter of 56mm. The center of the shear pin hole 1111 is 8mm from the rear end of the locking section 111. The locking section 111 is 56mm long. The outer diameter of the shear pin hole 1111 is 8mm, the depth is 5mm, and the inner diameter is 5mm. The depth is 8mm, the outer diameter of the sealing section A112 is 99.6mm, the inner diameter is 50mm, the sealing section A112 is 176mm long, and the inner diameter of the liquid channel section 113 is 70mm.

The total length of the shear pin 13 is 16.5mm, the large length of the shear pin head is 3.5mm, the outer diameter is 7mm, the outer diameter of the small end of the shear pin head is 4.8mm, and the sum of the length of the small end of the shear pin head and the end of the shear pin is 13mm.

The length of the pin 24 is 17.3mm, of which the length of the nail head is 4.8mm, the length of the nail body is 12.5mm, the outer diameter of the nail head is 12mm, the outer diameter of the nail body is 10mm, and the inner and outer ends of the pin 24 are 2.5mm × 45 °. Chamfer.

The connection pipe 21 includes a front section of the connection pipe 21 and a rear section of the connection pipe 21. The rear section of the connection pipe 21 is a rear connection section and a pressure relief section from back to front, and the front section of the connection pipe 21 is a choke section and a front section from back to front. The inner diameter of the rear connection section is larger than the inner diameter of the pressure relief section. The outer diameter of the rear connection section is greater than the outer diameter of the pressure relief section. The front end surface of the rear connection section is inclined forward from the outside to the inside and the angle with the radial section is 45 °. The rear connection section has internal threads, the pressure relief section has pressure relief holes, the outside diameter of the pressure relief section is 94.5mm, the internal diameter of the pressure relief section behind the pressure relief hole is 74mm, and the internal diameter of the pressure relief section in front of the pressure relief hole is 72mm The front end surface of the pressure relief hole is connected to the inner wall of the pressure relief section by a slope with a radial section angle of 76 °. The pressure relief hole is a strip-shaped through hole, the width of the pressure relief hole is 16mm, and the front and back sides of the pressure relief hole are semicircular. Arc surface, semi-circular arc surface radius is 8mm, the outer wall of the pressure relief section is provided with a guide groove, the width of the guide groove is 15mm, the guide groove is directly in front of the pressure relief hole, and the pressure relief hole and the guide groove are both 2 , Uniformly distributed along the circumference at the same axial position, the inner diameter of the front section of the connecting pipe is 50mm, the inner wall of the pressure relief section and the inner wall of the flow restriction section pass through and radially The bevel connection with a surface angle of 45 °, the unlocking hole 211 is in the blocking section, the thickness of the pipe wall of the blocking section is 14mm, the unlocking hole 211 is divided into a nail head section and a nail body section, the nail head section is 5mm deep, and the nail body section is 9mm deep. The diameter of the nail head is 12.1mm, the diameter of the nail body is 10mm, there are 3 unlocking holes 211, which are evenly distributed along the circumference in the same axial position. The outer diameter of the blocking section is 78mm, and the outer diameter of the front connecting section is 67.9mm. The front end surface of the flow section is inclined from the outside to the inside, and the angle with the radial section is 15 °. The length of the rear connection section is 155mm, the length of the pressure relief section is 35mm, the length of the choke section is 25mm, and the length of the front connection section is 65mm. The front connection section has external threads.

The locking pin 23 has an inner diameter of 32mm, the locking pin 23 is 220mm long, and the locking pin 23 has a connecting part, a working part and an inserting part in order from the back to the front. The connecting part is 38mm, the outer diameter of the connecting part is 38mm, and the outer wall of the connecting part has M40 × 1.5 threads. The area on the outer wall of the connecting part that is no more than 8mm from the front end surface of the working part is unthreaded. The working minister is 63mm and the outer diameter is 50mm. The groove A231 is on the outer wall of the working part. The bottom surface of the groove A231 is 22.5mm away from the axis of the locking pin 23. The front end of the connection part is 59mm from the front end of the opening of the groove A231, the width of the opening of the groove A231 is 25.5mm, the bottom surface of the groove A231 is connected to the outer wall of the working part through an inclined surface with an angle of 45 ° to the radial section, and the insertion length is 98mm. The diameter is 48mm.

The outer diameter of the outer cylinder 22 is 95mm, the inner diameter is 80mm, the depth of the groove B221 is 2.5mm, the width of the groove bottom is 5mm, the angle between the sides of the groove B221 is 90 °, and the front end of the groove B221 is 15.5mm from the rear end of the outer cylinder 22. .

Of course, the present invention may have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications according to the present invention, but these corresponding changes All modifications and variations shall fall within the protection scope of the appended claims.

Claims

An automatic starting mechanism for a core drilling rig is characterized in that it includes a center rod (14), a liquid channel starting module, an outer tube (22) and an outer tube unlocking module, and the center rod (14) passes through the liquid channel starting module and the outer tube. The inner cavity of the unlocking module, the liquid channel activating module is behind the outer cylinder unlocking module and the outer cylinder, and the fluid channel activating module is connected with the outer cylinder unlocking module.
The automatic starting mechanism for a core drilling rig according to claim 1, wherein the liquid channel starting module comprises a lock body (11), a lock lever (12), a shear pin (13), and the lock body (11) The lock body (11) includes a locking section (111), a sealing section (112), and a liquid channel section (113) from back to front. The side wall of the locking section (111) has a shear pin hole (1111) and a shear pin. The hole (1111) is a through hole, the locking lever (12) penetrates back and forth, the locking lever (12) is inside the lock body (11), and the locking lever (12) is a connection section (121) and an outflow section in order from back to front (122), a sealing section B (123), and an inflow section (124). The outer wall of the connecting section (121) has a shear pin groove (1211). The shear pin (13) is in the shear pin hole (1111) and the shear pin groove ( 1211), the center rod (14) is inside the locking rod (12), the sealing section A (112) is sealingly matched with the sealing section B (124), and the liquid channel section (113) is in lock with the locking rod (12) ) Has a liquid channel B (32), the connecting section (121), the outflow section (122) and the center rod (14) have a liquid channel A, and the inflow section (124) and the center rod (14) have a liquid channel. C (33), the sealing section B (123) and the center rod (14) are sealingly matched, the liquid channel A (31) is provided with an outflow hole (1221), and the liquid channel C (33) is provided with an inflow hole (1241), Liquid channel B (32 ) Communicates with the liquid channel C (33) through the inflow hole (1241), and the axial distance from the front end of the sealing section A (112) to the rear end of the lock body (11) is smaller than the front end of the sealing section B (123) to the lock body (11) The axial distance of the rear end. Before the shear pin (13) is cut, the outflow hole (1221) is sealed at the seal section A (112), and the front end of the liquid channel A (31) is sealed. After the shear pin (13) is cut, the outflow hole (1221) is at In the liquid passage section (113), the liquid passage A (31) and the liquid passage B (32) communicate with each other through the outflow hole (1221).
The automatic starting mechanism for a core drilling rig according to claim 2, characterized in that: the outer cylinder unlocking module comprises a connecting pipe (21), an outer cylinder (22) and a lock pin (23), and a rear end of the connecting pipe (21) It is connected with the lock body (11), the rear end of the lock pin (23) is connected with the lock lever (12), the center rod (14) passes through the inner cavity of the lock pin (23), and the outer diameter of the center rod (14) is smaller than the lock pin (23) ) Inner diameter, the center rod (14), connecting tube (21), outer tube (22) and locking pin (23) are coaxial, the locking pin (23) is inside the connecting tube (21), and the outer diameter of the front section of the connecting tube (21) Smaller than the inner diameter of the outer tube (22), the front wall of the connecting tube (21) has an unlocking hole (211), the outer wall of the lock pin (23) has a groove A (231), and the inner wall of the outer tube (22) has a groove B (221), further comprising a pin (24), the length of the pin (24) is greater than the depth of the unlocking hole (211), the pin (24) is inside the unlocking hole (211), and the outer end of the pin (24) is chamfered and / Or the side of groove B (221) is beveled, the width of groove A (231) is not less than the width of the inner end of pin (24), the width of groove B (221) is not less than the width of the outer end of pin (24), and the shear pin ( 13) Before cutting, the front end of the connecting tube (21) is inside the outer cylinder (22), the pin (24) is in front of the groove A (231), the inner end surface of the pin (24) and the outer wall of the locking pin (23) Sliding fit, the outer end of the pin (24) is inserted into the groove B (221), after the shear pin (13) is cut, the inner end of the pin (24) is inserted into the groove A (231), and the inner end surface of the pin (24) is to the outer cylinder (22) The distance of the inner wall is greater than the length of the pin (24).
The automatic starting mechanism for a core drilling rig according to claim 3, wherein the inner diameter of the locking section (111) is larger than the inner diameter of the sealing section A (112), and the outer wall of the connecting section (121) has a raised portion (1212) , The outer diameter of the convex portion (1212) is larger than the inner diameter of the sealing section A (112), the outer diameter of the convex portion (1212) of the connecting section (112) is equal to the inner diameter of the sealing section A (112), and the shear pin groove (1211) is at The raised portion (1212).
The automatic starting mechanism for a core drilling rig according to claim 4, further comprising a lock nut (15), the lock nut (15) is behind the lock body (11), and the lock nut (15) penetrates back and forth, The center rod (14) passes through the inner cavity of the lock nut (15), the front end of the lock nut (15) is threadedly connected with the rear end of the lock body (11), and the shear pin hole (1111) is opened at the rear thread of the lock body (11) Where the radial distance from the inner wall of the lock nut (15) to the bottom of the shear pin groove (1211) is not less than the length of the shear pin (13).
The automatic starting mechanism for a core drilling rig according to claim 5, characterized in that the lock nut (15) comprises a fixed section (151) and a threaded section (152), and a convex section (1212) of the connecting section (12) The outer diameter of the rear section is smaller than the inner diameter of the fixed section (151) and smaller than the outer diameter of the convex section (1212), and the inner diameter of the threaded section (152) is equal to the outer diameter of the lock section (111).
The automatic starting mechanism for a core drilling rig according to claim 5, wherein the lock nut (15) is axially opened with a lock hole A (153), and the lock hole A (153) is a through hole The rear end face of the lock body (11) has a locking hole B (114), the locking hole B (114) is a blind hole, the locking hole A (153) and the locking hole B (114) are paired, and a fixing screw ( 154), the length of the fixing screw (154) is greater than the depth of the locking hole A (153), the fixing screw (154) is inside the locking hole A (153), and the front end of the fixing screw (154) is inserted through the locking hole A (153) Locking hole B (114).
The automatic starting mechanism for a core drilling rig according to claim 3, wherein the outflow holes (1221) are inclined forward from the inside to the outside, and the outflow holes (1221) have a plurality of outflow holes (1221). The same axial position is uniformly distributed along the circumference. There are multiple inflow holes (1241). The inflow holes (1241) are distributed back and forth on different sides. There are multiple unlocking holes (211). The same axial position is evenly distributed along the circumference.
The automatic starting mechanism for a core drilling rig according to claim 3, wherein the pin (24) comprises a nail head and a nail body, the nail head is on the inside, and the unlocking hole (211) is provided with a nail head section and a nail correspondingly. Body length, the length of the nail head is less than the depth of the nail head, and the length of the nail body is greater than the depth of the nail body. After the shear pin (13) is cut, the lock lever (12) is moved forward, and the shear pin head is in the shear pin hole (1111). The shear pin tail is in a shear pin groove (1211), the shear pin head includes a large head and a small head, the large head is outward, and the outer diameter of the large head is greater than the outer diameter of the small head. The shear pin hole (1111) is provided with a corresponding arrangement. Inner and outer sections, the diameter of the outer section is not less than the outer diameter of the large head of the shear pin head, the diameter of the inner section is not less than the outer diameter of the small head of the shear pin head, the diameter of the inner section is less than the outer diameter of the big head, and the depth of the outer section is not less than the length of the big head. The sum of the length of the shear pin tail is greater than the depth of the inner section.
The automatic starting mechanism for a core drilling rig according to claim 3, characterized in that: the angle between the outer end of the pin (24) and the radial section and the angle between the side of the groove B (221) and the radial section are mutually I.