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CN-121993072-A - High-efficiency sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment and method

CN121993072ACN 121993072 ACN121993072 ACN 121993072ACN-121993072-A

Abstract

The invention relates to the technical field of geological mineral exploration and engineering geological exploration and development, and discloses high-efficiency sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment and method, wherein the equipment comprises a rope coring drilling tool assembly, a high-pressure flushing fluid circulation system, a drilling sand-carrying structure and an in-hole sand-settling prevention centering device; the high-pressure flushing fluid circulation system is communicated with the inner pipe body through the water through sleeve, the in-hole sand setting prevention centering device comprises a spring clamping chamber, a spring clamping blocking head and a centering ring matched with the SQ drill rod, and the high-pressure flushing fluid circulation system pumps solid-free high-viscosity flushing fluid with the density of 1.10-1.25 g/cm < 3 > into the hole, so that the integrated operation of well killing, sand carrying and wall protection is achieved. The one-time well killing success rate of the high-inclination high-bearing water stratum is greatly improved by the cooperation of the bidirectional ball valve instantaneous seal, the three-stage reaming sand carrying and the high-shear-force solid-free flushing fluid, and the problem of linkage accidents caused by water burst dilution, a rock chip bed, drill sticking and drill burying is solved.

Inventors

  • ZHANG SHISHU
  • LI FENGLIN
  • RAN CONGYAN
  • ZHAO XIAOPING
  • LI QINGCHUN

Assignees

  • 中国电建集团成都勘测设计研究院有限公司

Dates

Publication Date
20260508
Application Date
20260130

Claims (10)

  1. 1. High-efficient sand-carrying high-inclination high-pressure-bearing water stratum rope coring drilling equipment is characterized by comprising: a large-diameter rope coring drilling tool assembly, a high-pressure flushing fluid circulation system, a drilling sand carrying structure and an in-hole sand setting prevention centralizing device; The rope coring drilling tool assembly comprises a spearhead I (1), a positioning spring (2), a positioning pin (3), an elastic pin I (4), a spearhead seat (5), an elastic pin II (6), a recovery pipe (7), an elastic clamping frame (8), an expanding spring (9), an elastic pin III (10), an elastic clamping plate (11), an elastic pin IV (12), a steel ball I (13), an adapter connector (14), a ball valve sleeve I (15), a pressure spring I (16), a water through sleeve (17), a sealing piston (18), a sealing seat (19), a riveting pin (20), a hanging ring (21), a steel ball II (22), a ball valve sleeve II (23), a hanging connector (24), a pressure spring II (25), a double-stack self-locking gasket (26), an adjusting nut (27), a main shaft body (28), a valve plate (29), a bearing sheath (30), a bearing I (31), a bearing seat (32), a bearing II (33), a main shaft spring (34), a self-locking nut (35), an inner pipe connector (36), an oiling nozzle (37), a double-self-locking gasket (38), a steel ball (39), a valve gland (40), a clamp spring (41) and a clamp spring (43) which are sequentially connected from top to bottom A clamping spring seat (44) and a drill bit (45); The high-pressure flushing fluid circulation system is communicated with the inner pipe body (41) through the water through sleeve (17), the drilling sand carrying structure comprises a reamer I (46), a centralizing ring (47), an outer pipe (48), a seat ring (49) and an upper reamer (50), the in-hole sand setting prevention centralizing device comprises a spring clamping chamber (51), a spring clamping head (52) and the centralizing ring (47) matched with an SQ drill rod (53), and the high-pressure flushing fluid circulation system pumps solid-free high-viscosity flushing fluid with the density of 1.10-1.25 g/cm < 3 > into holes to achieve well killing, sand carrying and wall protecting integrated operation.
  2. 2. The efficient sand-carrying high-inclination high-pressure water stratum rope coring drilling equipment according to claim 1 is characterized in that a two-way sealing valve structure is formed by a ball valve sleeve I (15) and a ball valve sleeve II (23) through a steel ball I (13), a steel ball II (22), a pressure spring I (16) and a pressure spring II (25), the equipment is automatically closed when an inner pipe is salvaged, high-pressure water in a hole is prevented from flowing backwards into the inner pipe, and continuous operation safety of rope coring is ensured.
  3. 3. The efficient sand-carrying high-inclination high-pressure-bearing water stratum rope coring drilling equipment according to claim 2, wherein the spring clamping frame (8), the expansion spring (9), the spring clamping plate (11) are matched with the spring clamping chamber (51) and the spring clamping stop head (52) to form a telescopic spring clamping positioning mechanism, the outer tube (48) is automatically clamped when the inner tube is lowered, and the clamping is lifted and released through a steel wire rope when the inner tube is salvaged, so that accurate salvaging and repeated lowering are achieved.
  4. 4. The efficient sand carrying high-inclination high-bearing water stratum rope coring drilling equipment according to claim 3, wherein the first reamer (46) is located above a drill bit (45), the upper reamer (50) is located at the top of an outer tube (48), and the first reamer and the centralizing ring (47) form a three-stage sand carrying channel together, so that the rock debris upward return efficiency is improved, and rock debris beds are prevented from being formed by hole sections with high inclination of 40-70 degrees.
  5. 5. The efficient sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment according to claim 4, wherein a plurality of inclined spray holes are arranged in the water through sleeve (17), and are matched with the high-pressure flushing fluid circulation system, an eddy flushing area is formed near a drill bit (45), so that hole bottom rock powder is quickly suspended and carried to an inlet of a reamer I (46).
  6. 6. The efficient sand-carrying high-inclination high-pressure bearing water stratum rope coring drilling equipment according to claim 5, wherein the high-pressure flushing fluid circulation system adopts solid-free environment-friendly flushing fluid, and comprises the following formula: Density 1.15 g/cm3, clear water + 10-50% HCOONa +0.2-0.5% XC-HV + 1-3% PGCS-1 + NaOH (pH 8-9); The density is 1.25 g/cm < 3 >, clear water is +30-45% HCOONa+0.2-0.5% XC-HV+1-3% PGCS-1+NaOH (pH 8-9); The performance parameters are that the viscosity is 60-100 s, the static shearing force is 0.5-3/2-6 Pa, the product is transparent and non-fluorescent, and the product can be recycled.
  7. 7. The high-efficiency sand-carrying high-inclination high-pressure water stratum rope coring drilling equipment according to claim 1, wherein the main shaft body (28) rotates at a high speed through a first bearing (31), a second bearing (33) and a bearing sheath (30) and an outer tube (48), and the inner tube is ensured not to be adhered to a drill bit (45) by matching with the non-mud skin characteristic of transparent flushing fluid.
  8. 8. The efficient sand-carrying high-inclination high-pressure-bearing water stratum rope coring drilling equipment according to claim 1, wherein the seat ring (49) is in threaded connection with the SQ drill rod (53), the clearance between the outer diameter of the centralizing ring (47) and the diameter of a drilled hole is less than or equal to 3mm, and the large-displacement pumping is matched, so that rock fragments are ensured not to be deposited in an inclination section of 40-70 degrees.
  9. 9. The efficient sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment according to claim 1, wherein the outer tube (48) comprises a first connecting tube (481) and a second connecting tube (482), one end of the first connecting tube (481) is clamped inside the second connecting tube (482), one end of the first connecting tube (481) is fixedly connected with a connecting column (483), one end of the connecting column (483) is fixedly connected with an arc clamping plate (484), the outer part of the second connecting tube (482) is fixedly connected with a baffle plate (485), an L-shaped clamping groove (486) and a sliding groove (487) are formed in the second connecting tube (482), a fixed release assembly (488) is mounted in the second connecting tube (482), and the outer part of the arc clamping plate (484) is mounted inside the L-shaped clamping groove (486). The fixed release assembly (488) comprises a handle (4811), the outside of the handle (4811) is slidably connected with the inside of the connecting pipe II (482) through a chute (487), the bottom end of the handle (4811) is fixedly connected with a connecting plate (4882), the outside of the connecting plate (4882) is slidably connected with the inside of the connecting pipe II (482), and the inside of the connecting pipe II (482) is fixedly connected with a fixing plate (4883) The outside of connecting plate (4882) is equal fixedly connected with connecting rod one (4884) and connecting rod two (4887), the outside sliding connection of connecting rod one (4884) and connecting rod two (4887) is in the inside of fixed plate (4883), the one end fixedly connected with eccentric block (4885) of connecting rod one (4884), the outside fixedly connected with rubber pad (4886) of eccentric block (4885), the one end fixedly connected with of connecting rod two (4887) is in the outside of eccentric block (4885), install pressure spring three (4888) between fixed plate (4883) eccentric block (4885), pressure spring three (4888) cover is established in the outside of connecting rod two (4887).
  10. 10. The method for coring and drilling the high-efficiency sand-carrying high-inclination high-pressure-bearing water stratum rope is characterized by being applied to the equipment for coring and drilling the high-efficiency sand-carrying high-inclination high-pressure-bearing water stratum rope, and comprises the following steps of: s1, preparing solid-phase-free flushing fluid with the density of 1.15-1.25 g/cm < 3 >, and pumping the flushing fluid to fill the drilling volume at one time; s2, a rope core drilling tool assembly is put in, and the spring clamping mechanism is automatically positioned and locked; S3, starting large-displacement pumping, and enabling flushing liquid to form hole bottom vortex through inclined spray holes of the water through sleeve (17); s4, a drill bit (45) breaks rock, and rock powder enters a three-stage reaming sand carrying channel along with high-shear-force flushing fluid; s5, a centralizing ring (47) prevents the drilling tool from deflecting and inhibits formation of a rock debris bed; s6, drilling to a specified depth, fishing the inner pipe by using a fishing device, and automatically sealing the bidirectional ball valve to prevent backflow; s7, replacing the inner tube, then lowering again, automatically resetting the spring clip, and continuing drilling; S8, monitoring the density and viscosity of the flushing liquid in the whole process, and supplementing HCOONa and XC-HV when the density is reduced, so that the performance is maintained stable.

Description

High-efficiency sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment and method Technical Field The invention relates to the technical field of geological mineral exploration and development and engineering geological exploration, in particular to efficient sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment and method. Background With the implementation of strong national strategic projects such as energy, traffic, national water networks and the like, the construction of the infrastructure of China is vigorous, and the construction of the underground projects is the country with the largest quantity, scale and difficulty. The geographic and geological conditions of the western region are extremely complex, the extreme geological environment with high altitude, high burial depth, high stress, high water pressure and large fall is faced, and the difficulties of undefined distribution rule of transverse and longitudinal lithology, lack of original data of lithology and the like are overcome, so that the development of important engineering strategy development requirements of the country is seriously hindered, and the development of multidimensional fine directional investigation is imperative. The method is characterized in that investigation of deep-buried tunnels (holes) in difficult regions such as high-altitude mountain areas, deep-cut river valleys and the like is carried out, geographical conditions are complex and severe, the vertical hole drilling machine is difficult to carry and even cannot be moved, horizontal holes or high-inclination directional holes are required to reach target positions such as the underground deep-buried tunnels (holes) and the like, the drilling is generally carried out by adopting ropes for coring, but the drilling is carried out on high-bearing water stratum, flushing fluid is immediately diluted when the flushing fluid is carried on the high-bearing water stratum, rock powder is quickly sunk, meanwhile, according to related information, when the drilling inclination is 40-50 degrees, the drilling is easy to form a rock debris bed, and rock debris is easy to accumulate at the lower part of the drilling and is difficult to return. Under the conditions, the highly-inclined high-pressure water stratum is difficult to return rock scraps (powder), sand is more deposited in holes, and drill sticking or drill burying accidents are easy to occur. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the high-efficiency sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment and the method, which solve the problems that the rock scraps (powder) are difficult to return upwards, sand is more settled in holes, and drill sticking or drill burying accidents are easy to occur in the prior art. In order to achieve the purpose, the invention is realized by the following technical scheme that the high-efficiency sand-carrying high-inclination high-bearing water stratum rope coring drilling equipment comprises: the drilling device comprises a rope coring drilling tool assembly, a high-pressure flushing fluid circulating system, a drilling sand carrying structure and an in-hole sand setting prevention centering device; the rope coring drilling tool assembly comprises a spearhead I, a positioning spring, a positioning pin, an elastic pin I, a spearhead seat, an elastic pin II, a recovery pipe, an elastic clamping frame, an expanding spring, an elastic pin III, an elastic clamping plate, an elastic pin IV, a steel ball I, an adapter joint, a ball valve sleeve I, a pressure spring I, a water through sleeve, a sealing piston, a sealing seat, a riveting pin, a suspension ring, a steel ball II, a ball valve sleeve II, a suspension joint, a pressure spring II, a double-stacked self-locking gasket, an adjusting nut, a main shaft body, a valve plate, a bearing sheath, a bearing I, a bearing seat, a bearing II, a main shaft spring, a self-locking nut, an inner pipe joint, a grease nipple, a double-stacked self-locking valve pad, a steel ball, a valve gland, an inner pipe body, a clamping spring retainer ring, a clamping spring body, a clamping spring seat and a drill bit which are sequentially connected from top to bottom; The high-pressure flushing fluid circulation system is communicated with the inner pipe body through the water through sleeve, the drilling sand carrying structure comprises a reamer I, a centralizing ring, an outer pipe, a seat ring and an upper reamer, the in-hole sand setting prevention centralizing device comprises a spring clamping chamber, a spring clamping blocking head and the centralizing ring matched with the SQ drill rod, and the high-pressure flushing fluid circulation system pumps solid-free high-viscosity flushing fluid with the density of 1.10-1.25 g/cm <3 > into the hole, so that the integrated operation of well killing, sand car