CN105317372A - One-way bypass screw drilling tool - Google Patents
One-way bypass screw drilling tool Download PDFInfo
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- CN105317372A CN105317372A CN201410394629.9A CN201410394629A CN105317372A CN 105317372 A CN105317372 A CN 105317372A CN 201410394629 A CN201410394629 A CN 201410394629A CN 105317372 A CN105317372 A CN 105317372A
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Abstract
The invention provides a one-way bypass screw drilling tool, which mainly comprises a bypass valve assembly realizing one-way bypass, a motor assembly, a universal shaft assembly and a transmission shaft assembly, wherein the bypass valve assembly realizing one-way bypass comprises a bypass valve and a one-way valve; the bypass valve mainly consists of a valve body, a valve core, a large spring, a valve opening, a clamp spring and a retainer ring; the one-way valve comprises a body, a valve rod, a small spring and a screw cap; the one-way valve and the bypass valve are mutually matched and connected; connecting external screw threads are arranged on the outer pipe wall of the body of the one-way valve; connecting internal screw threads are arranged on the inner wall of the valve opening of the bypass valve; the one-way valve is arranged on the valve opening of the bypass valve through the connecting internal screw threads and the connecting external screw threads, so that the one-way valve is arranged in the valve opening of the bypass valve; an outer opening of the one-way valve is directly communicated and connected with an outer opening of the valve opening of the bypass valve; and an inner opening of the one-way valve is directly communicated and connected with an inner opening of the valve opening of the bypass valve. The one-way bypass screw drilling tool has the advantages that the one-way bypass is realized; the structure is simple; the reliability is high; the service life can be prolonged; the pipe tripping is reduced; and the drilling cost is reduced.
Description
Technical field
The present invention relates to the instrument of a kind of oil and gas exploration and exploitation, be particularly suitable for the helicoid hydraulic motor of the unidirectional bypass used in the mud medium deep-well of gas base flow body drilling technology and high temperature strong vibration, ultradeep well probing.
Background technology
Helicoid hydraulic motor is most widely used a kind of mud motor in the outer oil of Present Domestic, gas drilling field, along with the development of modern drilling technology, especially along with the popularization of combined drilling, the function that helicoid hydraulic motor is played the part of in drillng operation gets more and more, and acts on also increasing.Helicoid hydraulic motor mainly comprises by-pass valve assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly; Its by-pass valve assembly, motor assembly, universal drive shaft assembly are connected from top to bottom successively with driving-shaft assembly.By-pass valve assembly is one of vitals of composition helicoid hydraulic motor, and by-pass valve assembly comprises bypass valve and upper pipe nipple.Bypass valve rise, lower brill time be in out position, drilling fluid in drill string is communicated with down-hole annular.At present, the bypass valve of general helicoid hydraulic motor, primarily of valve body, spool, spring, valve port and jump ring and ring washer composition, body cavity is provided with cylindrical channel with the level, cylindrical channel is connected with valve port, and spool is matched with cylindrical channel with the level by spring, and the lower end of spool is provided with spool bore, when spool bore is communicated with the valve port on valve body, bypass valve is in out position.At present, the bypass valve valve port of its general helicoid hydraulic motor has a filter screen, and be two-way straight-through, namely its helicoid hydraulic motor is two-way bypass, so at lower brill, creep into, make up a joint, during termination of pumping, the impurity such as the silt particle often in down-hole annular, screw thread film can enter in drilling tool water hole by the filter screen of the valve port of screw rod bypass valve, cause that helicoid hydraulic motor is stuck, helicoid hydraulic motor damages in advance, bit port blocks, directional well instrumentation card in drilling tool water hole waits indefinitely accident, brings huge economic loss.
The present invention is directed to current helicoid hydraulic motor Problems existing and carry out corresponding Optimal improvements, helicoid hydraulic motor after improvement has the advantage of unidirectional bypass, for drilling well provides technical support and guarantee, avoid screw deadlocking, screw rod damages in advance, bit port blocks, directional well instrumentation card in drilling tool water hole waits indefinitely accident.
Summary of the invention
The object of this invention is to provide a kind of helicoid hydraulic motor of unidirectional bypass; The helicoid hydraulic motor of its unidirectional bypass achieve unidirectional bypass, overcome the defect of the two-way bypass of general helicoid hydraulic motor, so at lower brill, creep into, make up a joint, during termination of pumping, the impurity such as the silt particle in down-hole annular, screw thread film do not enter in drilling tool water hole by the valve port of the bypass valve of the unidirectional bypass of helicoid hydraulic motor; Avoid screw deadlocking, screw rod damages in advance, bit port blocks, directional well instrumentation card in drilling tool water hole waits indefinitely accident; And its structure is simple, stable, reasonable.
The object of the present invention is achieved like this: a kind of helicoid hydraulic motor of unidirectional bypass, and the helicoid hydraulic motor of its unidirectional bypass mainly comprises the by-pass valve assembly of unidirectional bypass, motor assembly, universal drive shaft assembly and driving-shaft assembly; The bypass valve of its unidirectional bypass, motor assembly, universal drive shaft assembly are connected from top to bottom successively with driving-shaft assembly.The by-pass valve assembly of unidirectional bypass comprises bypass valve and one way valve and upper pipe nipple.Bypass valve, primarily of valve body, spool, big spring and jump ring and ring washer composition, valve body has valve port; Described body cavity is provided with cylindrical channel with the level, and the step on its cylindrical channel is provided with two, and two steps are respectively the step of upper end and the step of lower end, and cylindrical channel is connected with valve port; The upper end of spool is provided with an outer step, and the lower end of spool is provided with a spool bore; Spool by big spring and cylindrical channel with the level in mating connection, like this, its spool is in the cylindrical channel of valve body, and its big spring is placed on spool, the spool of big spring between the outer step of spool and the step of the lower end of the cylindrical channel of valve body and valve body coordinate in the axial annular space that formed; The outside of the step of the upper end of the cylindrical channel of valve body is provided with jump-ring slot, ring washer is placed in spool outer end and on the step of the upper end of the cylindrical channel of valve body, jump ring is in jump-ring slot, and jump ring is pressed against on ring washer, thus fixing ring washer, its spool is below ring washer; The upper end of valve body is provided with internal thread, and the lower end of valve body is provided with external screw thread.When bypass valve is installed, first big spring is put in valve body, again spool is installed, namely spool is arranged in the cylindrical channel of valve body, and make big spring be placed on spool, ring washer is placed on the step of the upper end of its cylindrical channel of spool outer end, finally jump ring is arranged in jump-ring slot, make jump ring be pressed against on ring washer, ring washer is fixed.When using bypass valve, its spool bore is communicated with the valve port on valve body, and bypass valve is just in out position.One way valve comprises body, valve rod, little spring, nut, and wherein, body outer tube wall is provided with connection external screw thread, and described body is provided with the cavity of hollow, and described body is provided with interior shoulder in the middle part of inwall; Described valve rod is T-type structure, and described valve rod comprises sealed end and the body of rod, and the external diameter of described sealed end is less than the internal diameter of cavity and is greater than the internal diameter of interior shoulder, and the external diameter of the described body of rod is less than the internal diameter of interior shoulder, and the described body of rod is placed in interior shoulder.The described body of rod is provided with away from one end of sealed end the screw thread matched with described nut, and the body of rod to be cooperatively interacted with nut by screw thread away from one end of sealed end and is connected, and the external diameter of described nut is greater than the internal diameter of interior shoulder and is less than the internal diameter of cavity; Described little spring is sleeved on the body of rod between interior shoulder and nut.The described body of rod is provided with the righting board being evenly equipped with through hole between interior shoulder and little spring, and righting board is sleeved on the body of rod, and described righting board, both by drilling fluid, also can limit the radial scope of activities of valve rod.Described interior shoulder offers seal groove on the table top of sealed end, is provided with sealing ring in described seal groove.Hexagonal structure in one end tool of described body, the Single port of the interior hexagonal structure of described body is the collar extension of body, and the another port of body is the internal orifice of body, and the collar extension of body is referred to as the collar extension of one way valve, and the internal orifice of body is referred to as the internal orifice of one way valve; The collar extension of its sealed end, body is positioned at the side of the shoulder in the middle part of the inwall of body, and the internal orifice of nut, little spring and righting board, body is positioned at the opposite side of the shoulder in the middle part of the inwall of body; First sealing ring is arranged in seal groove during installation, then valve rod is placed in body cavity by sealing ring side, from the opposite side of body cavity, righting board, little spring, nut are installed successively.The inwall of the valve port of bypass valve is provided with connection internal thread, one way valve cooperatively interacts with bypass valve and is connected, one way valve is made to be arranged in the valve port of bypass valve, the collar extension of the collar extension of its one way valve and the valve port of bypass valve directly interlinks, the internal orifice of the internal orifice of one way valve and the valve port of bypass valve directly interlinks, connection internal thread on the inwall of the connection external screw thread of the body outer tube wall of its one way valve and the valve port of bypass valve screws connection, one way valve is tightened by hexagonal structure in one end of body with instrument, thus make one way valve be fixed in the valve port of bypass valve, like this, by connecting internal thread and being connected external screw thread one way valve is arranged on the valve port of bypass valve.Motor assembly mainly comprises motor joint, anti-lost assembly, stator case, rubber bushing, hollow rotor and rotor flow tract; The upper and lower two ends of motor joint are connected with the lower end of the valve body of bypass valve and stator case respectively; The sulfuration of stator case endoporus has rubber bushing, and hollow rotor screws in stator case endoporus, coordinates with rubber bushing; Anti-lost assembly lower end is connected with hollow rotor, and there are 2 ~ 3 rotor flow tracts hollow rotor lower end; Universal drive shaft assembly mainly comprises universal shaft housing, stop collar, upper petal ball pivot, pressure-bearing ball, ball seat connecting rod, lower petal ball pivot and water cap; Universal shaft housing upper end is connected with stator case, and upper petal ball pivot is connected with hollow rotor; The upper and lower two ends of ball seat connecting rod coordinate with upper petal ball pivot and lower petal ball pivot respectively, and stop collar is connected with ball seat connecting rod, petal ball pivot movement upwards in restriction; Pressure-bearing ball is arranged on ball seat connecting rod and coordinates with upper petal ball pivot in the hole that formed, and water cap is connected with lower petal ball pivot; Driving-shaft assembly mainly comprises transmission shaft shell, power transmission shaft, upper seal assembly, intermediate seal assembly, lower seal assembly and lower pipe nipple; Transmission shaft shell upper end is connected with universal shaft housing, and lower end is connected with lower pipe nipple, and power transmission shaft is connected with water cap; Upper seal assembly is arranged on transmission shaft shell and power transmission shaft coordinates in the annular space of formation; Intermediate seal assembly is arranged in the middle part of driving-shaft assembly, and lower seal assembly is arranged on driving-shaft assembly lower end.Anti-lost assembly is made up of anti-lost nut, anti-lost pull bar; Anti-lost pull bar upper end is connected with anti-lost nut, and lower end is connected with hollow rotor; The position that described upper petal ball pivot and lower petal ball pivot are connected with ball seat connecting rod is 4 ~ 6 petal splines; Power transmission shaft is connected contact position by disc spring supporting and location with water cap.Described upper seal assembly comprises static sealing ring in power transmission shaft, upper sealing control spring, sleeve, upper seal group, piston/cylinder, upper seal group dynamic seal ring, the outer static sealing ring of upper seal group and bearing; Sleeve outer surface contacts with piston/cylinder, and inner surface contacts with power transmission shaft, and in hub internal bore installation 2 ~ 4 groups, static sealing ring in seal group, coordinates with power transmission shaft and form static seal; Seal group dynamic seal ring and bearing in piston/cylinder endoporus installation 2 ~ 3 groups, the outer static sealing ring of seal group in external surface installation 2 ~ 4 groups; Upper sealing control spring is arranged on piston/cylinder upper end; Intermediate seal assembly comprises static sealing ring and lower pipe nipple in transmission shaft shell, power transmission shaft, intermediate seal group dynamic seal ring, the outer static sealing ring of intermediate seal group, lock sleeve, intermediate seal group; Lower pipe nipple upper end endoporus installs 2 groups of intermediate seal group dynamic seal rings, coordinates form movable sealing with lock sleeve; Lower pipe nipple external surface installs the outer static sealing ring of 1 ~ 3 group of intermediate seal group, coordinates form static seal with transmission shaft shell; Lock sleeve upper end endoporus installs static sealing ring in 1 ~ 2 group of intermediate seal group, coordinates form static seal with power transmission shaft; Lower seal assembly comprises power transmission shaft, lower pipe nipple, equilibrium pressure runner, sealing check (non-return) valve, lower seal control spring, lower seal group dynamic seal ring and pipe close; Equilibrium pressure runner is inner at lower short circuit, and sealing check (non-return) valve and lower seal control spring are arranged in equilibrium pressure runner successively, and equilibrium pressure runner lower end port installs pipe close; Lower seal assembly endoporus installs 2 ~ 3 groups of lower seal group dynamic seal rings, coordinates form movable sealing with power transmission shaft.The contact surface of described sleeve and piston/cylinder plates one deck chromium, and its thickness is 0.05 ~ 0.20mm, to increase Corrosion Protection and the abrasion resistance of contact surface.Like this, the by-pass valve assembly of unidirectional bypass cooperatively interacts with one end of motor joint and is connected, and the external screw thread of the lower end of the valve body of its bypass valve screws with the internal thread of the upper end of motor joint and is connected; The other end of motor joint cooperatively interacts with motor assembly and is connected, and the external screw thread of the lower end of its motor joint screws with the internal thread of one end of the housing of motor assembly and is connected.The helicoid hydraulic motor of unidirectional bypass rising, lower brill or pump pressure low time, pump pressure is not enough to elastic force and the stiction of the big spring overcome on bypass valve, spool is failure to actuate, spool bore on spool is communicated with the valve port on valve body, due to the pressure effect of the drilling fluid in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass, outwards promote valve rod, make one way valve be in out position, drilling fluid in the helicoid hydraulic motor of unidirectional bypass can flow in down-hole annular, ensures normal construction, when pump pressure improves, the power of pump function on spool is greater than elastic force and the stiction of the big spring on bypass valve, spool action, move downward, hole on spool and the valve port on valve body are in closed state, bypass valve is in off-position, drilling fluid in the helicoid hydraulic motor of unidirectional bypass is not communicated with mutually with down-hole annular, drilling fluid in the helicoid hydraulic motor of unidirectional bypass enters motor assembly, drive the helicoid hydraulic motor work of unidirectional bypass, simultaneously, due to the pressure effect of the liquid in down-hole annular, the valve rod of inside promotion one way valve, one way valve is in off-position, silt particle in effective prevention down-hole annular, the impurity such as screw thread film enter in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass by the valve port of bypass valve, decrease, screw rod drill bit number of times changed by lower brill, save drilling time, the Stability Analysis of Structures of the by-pass valve assembly of unidirectional bypass, operating efficiency is high.Like this, the helicoid hydraulic motor of its unidirectional bypass achieves unidirectional bypass, thus reaches object of the present invention.
Owing to have employed technique scheme, the helicoid hydraulic motor of unidirectional bypass not only achieves unidirectional bypass, overcome the two-way straight-through defect of valve port of general bypass valve, at lower brill, creep into, make up a joint, during termination of pumping, the impurity such as the silt particle in down-hole annular, screw thread film do not enter in drilling tool water hole by the valve port of the bypass valve of the unidirectional bypass of helicoid hydraulic motor; Avoid screw deadlocking, screw rod damages in advance, bit port blocks, directional well instrumentation card in drilling tool water hole waits indefinitely accident.This tool construction is simple, reliability is high, can improve application life, reduces and makes a trip and reduce drilling cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 2 is the structural representation of the by-pass valve assembly of the unidirectional bypass of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 3 is the structural representation of the one way valve of the by-pass valve assembly of the unidirectional bypass of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention.
Fig. 4 is the structural representation of the motor assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 5 is the structural representation of the universal drive shaft assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 6 is the structural representation of the driving-shaft assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 7 is the structural representation of the upper seal assembly of the driving-shaft assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 8 is the structural representation of the intermediate seal assembly of the driving-shaft assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention;
Fig. 9 is the structural representation of the lower seal assembly of the driving-shaft assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention.
Figure 10 is the structural representation of the anti-lost assembly of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of the unidirectional bypass of the present invention.
In figure: 1. the by-pass valve assembly of unidirectional bypass, 2. motor assembly, 3. universal drive shaft assembly, 4. driving-shaft assembly, 5. go up pipe nipple, 6. the internal thread of bypass valve, 7. valve body, 8. spool, 9. big spring, 10. one way valve, 11. valve ports, 12. spool bore, the external screw thread of 13. bypass valve, the body of rod of the valve rod of 14. one way valves, the nut of 15. one way valves, the body of 16. one way valves, the sealing ring of 17. one way valves, through hole on the righting board of 18. one way valves, 19. anti-lost assemblies, 20. stator cases, 21. rubber bushings, 22. hollow rotors, 23. rotor flow tracts, 24. universal shaft housings, 25. stop collars, petal ball pivot on 26., 27. pressure-bearing balls, 28. ball seat connecting rods, 29. times petal ball pivots, 30. water caps, 31. transmission shaft shell, 32. disc springs, 33. power transmission shafts, seal assembly on 34., 35. intermediate seal assemblies, 36. lower seal assemblies, 37. anti-lost nuts, the righting board of 38. one way valves, the sealed end of the valve rod of 39. one way valves, the little spring of 40. one way valves, the ring washer of 41. bypass valve, the jump ring of 42. bypass valve, 43. motor joints, 44. anti-lost pull bars, control spring is sealed on 45., 46. sleeves, static sealing ring in seal group on 47., 48. piston/cylinders, seal group dynamic seal ring on 49., the outer static sealing ring of seal group on 50., 51. bearings, 52. intermediate seal group dynamic seal rings, the outer static sealing ring of 53. intermediate seal groups, 54. lock sleeves, static sealing ring in 55. intermediate seal groups, 56. times pipe nipples, 57. equilibrium pressure runners, 58. sealing check (non-return) valves, 59. lower seal control springs, 60. lower seal group dynamic seal rings, 61. pipe closes.
Detailed description of the invention
As shown in Fig. 1-Figure 10, the helicoid hydraulic motor of the unidirectional bypass of the present invention, mainly comprises the by-pass valve assembly 1 of unidirectional bypass, motor assembly 2, universal drive shaft assembly 3 and driving-shaft assembly 4.The by-pass valve assembly 1 of unidirectional bypass, motor assembly 2, universal drive shaft assembly 3 are connected from top to bottom successively with driving-shaft assembly 4; The by-pass valve assembly of unidirectional bypass comprises bypass valve and one way valve 10 and upper pipe nipple 5.Bypass valve forms primarily of valve body 7, spool 8, big spring 9 and jump ring 42 and ring washer 41, valve body 7 has valve port 11; Described body cavity is provided with cylindrical channel with the level, and the step on its cylindrical channel is provided with two, and two steps are respectively the step of upper end and the step of lower end, and cylindrical channel is connected with valve port; The upper end of spool is provided with an outer step, and the lower end of spool is provided with a spool bore 12; Spool by big spring and cylindrical channel with the level in mating connection, like this, its spool is in the cylindrical channel of valve body, and its big spring is placed on spool, the spool of big spring between the outer step of spool and the step of the lower end of the cylindrical channel of valve body and valve body coordinate in the axial annular space that formed; The outside of the step of the upper end of the cylindrical channel of valve body is provided with jump-ring slot, ring washer is placed in spool outer end and on the step of the upper end of the cylindrical channel of valve body, jump ring is in jump-ring slot, and jump ring is pressed against on ring washer, thus fixing ring washer, its spool is below ring washer; The upper end of valve body is provided with internal thread, and the lower end of valve body is provided with external screw thread 13.When bypass valve is installed, first big spring is put in valve body, again spool is installed, namely spool is arranged in the cylindrical channel of valve body, and make big spring be placed on spool, ring washer is placed on the step of the upper end of its cylindrical channel of spool outer end, finally jump ring is arranged in jump-ring slot, make jump ring be pressed against on ring washer, ring washer is fixed.When using bypass valve, its spool bore is communicated with the valve port on valve body, and bypass valve is just in out position.One way valve 10 comprises body 16, valve rod, little spring 40, nut 15, and wherein, body outer tube wall is provided with connection external screw thread, and described body is provided with the cavity of hollow, and described body is provided with interior shoulder in the middle part of inwall; Described valve rod is T-type structure, and described valve rod comprises sealed end 39 and the body of rod 14, and the external diameter of described sealed end is less than the internal diameter of cavity and is greater than the internal diameter of interior shoulder, and the external diameter of the described body of rod is less than the internal diameter of interior shoulder, and the described body of rod is placed in interior shoulder.The described body of rod is provided with away from one end of sealed end the screw thread matched with described nut, and the body of rod to be cooperatively interacted with nut by screw thread away from one end of sealed end and is connected, and the external diameter of described nut is greater than the internal diameter of interior shoulder and is less than the internal diameter of cavity; Described little spring is sleeved on the body of rod between interior shoulder and nut.The described body of rod is provided with the righting board 38 being evenly equipped with through hole 18 between interior shoulder and little spring, and righting board is sleeved on the body of rod, and described righting board, both by drilling fluid, also can limit the radial scope of activities of valve rod.Described interior shoulder offers seal groove on the table top of sealed end, is provided with sealing ring 17 in described seal groove.Hexagonal structure in one end tool of described body, the Single port of the interior hexagonal structure of described body is the collar extension of body, and the another port of body is the internal orifice of body, and the collar extension of body is referred to as the collar extension of one way valve, and the internal orifice of body is referred to as the internal orifice of one way valve; The collar extension of its sealed end, body is positioned at the side of the shoulder in the middle part of the inwall of body, and the internal orifice of nut, little spring and righting board, body is positioned at the opposite side of the shoulder in the middle part of the inwall of body; First sealing ring is arranged in seal groove during installation, then valve rod is placed in body cavity by sealing ring side, from the opposite side of body cavity, righting board, little spring, nut are installed successively.The inwall of the valve port of bypass valve is provided with connection internal thread, one way valve cooperatively interacts with bypass valve and is connected, one way valve is made to be arranged in the valve port of bypass valve, the collar extension of the collar extension of its one way valve and the valve port of bypass valve directly interlinks, the internal orifice of the internal orifice of one way valve and the valve port of bypass valve directly interlinks, connection internal thread on the inwall of the connection external screw thread of the body outer tube wall of its one way valve and the valve port of bypass valve screws connection, one way valve is tightened by hexagonal structure in one end of body with instrument, thus make one way valve be fixed in the valve port of bypass valve, like this, by connecting internal thread and being connected external screw thread one way valve is arranged on the valve port of bypass valve.Motor assembly 2 mainly comprises motor joint 43, anti-lost assembly 19, stator case 20, rubber bushing 21, hollow rotor 22 and rotor flow tract 23; Motor joint about 43 two ends are connected with the lower end of the valve body of bypass valve and stator case 20 respectively; The sulfuration of stator case 20 endoporus has rubber bushing 21, and hollow rotor 22 screws in stator case 20 endoporus, coordinates with rubber bushing 21; Anti-lost assembly 19 lower end is connected with hollow rotor 22, and there are 2 ~ 3 rotor flow tracts 23 hollow rotor 22 lower end; Universal drive shaft assembly 3 mainly comprises universal shaft housing 24, stop collar 25, upper petal ball pivot 26, pressure-bearing ball 27, ball seat connecting rod 28, lower petal ball pivot 29 and water cap 30; Universal shaft housing 24 upper end is connected with stator case 20, and upper petal ball pivot 26 is connected with hollow rotor 22; Ball seat connecting rod about 28 two ends coordinate with upper petal ball pivot 26 and lower petal ball pivot 29 respectively, and stop collar 25 is connected with ball seat connecting rod 28, petal ball pivot 26 movement upwards in restriction; Pressure-bearing ball 27 is arranged on ball seat connecting rod 28 and coordinates with upper petal ball pivot 26 in the hole that formed, and water cap 30 is connected with lower petal ball pivot 29; Driving-shaft assembly 4 mainly comprises transmission shaft shell 31, power transmission shaft 33, upper seal assembly 34, intermediate seal assembly 35, lower seal assembly 36 and lower pipe nipple 56; Transmission shaft shell 31 upper end is connected with universal shaft housing 24, and lower end is connected with lower pipe nipple 56, and power transmission shaft 33 is connected with water cap 30; Upper seal assembly 34 is arranged on transmission shaft shell 31 and power transmission shaft 33 coordinates in the annular space of formation; Intermediate seal assembly 35 is arranged in the middle part of driving-shaft assembly 4, and lower seal assembly 36 is arranged on driving-shaft assembly 4 lower end.Described anti-lost assembly 19 is made up of anti-lost nut 37 and anti-lost pull bar 44; Anti-lost pull bar 44 upper end is connected with anti-lost nut 37, and lower end is connected with hollow rotor 22; The position that described upper petal ball pivot 26 and lower petal ball pivot 29 are connected with ball seat connecting rod 28 is 4 ~ 6 petal splines; Power transmission shaft 33 is connected contact position by disc spring 32 supporting and location with water cap 30, disc spring 32 can play cushioning effect to power transmission shaft 33 threaded upper ends, avoids screw thread place that fracture and screw thread dropout occur.Described upper seal assembly 34 comprises static sealing ring 47 in power transmission shaft 33, upper sealing control spring 45, sleeve 46, upper seal group, piston/cylinder 48, upper seal group dynamic seal ring 49, the outer static sealing ring 50 of upper seal group and bearing 51; Sleeve 46 external surface contacts with piston/cylinder 48, inner surface contacts with power transmission shaft 33, sleeve 46 endoporus to install on 4 groups static sealing ring 47 in seal group, coordinate with power transmission shaft 33 and form static seal, sleeve 46 plates one deck chromium with the contact surface of piston/cylinder 48, its thickness is 0.05 ~ 0.20mm, to increase Corrosion Protection and the abrasion resistance of contact surface; Piston/cylinder 48 endoporus installs seal group dynamic seal ring 49 and bearing 51 on 2 groups, and external surface installs the outer static sealing ring 50 of seal group on 4 groups; Upper sealing control spring 45 is arranged on piston/cylinder 48 upper end; Intermediate seal assembly 35 comprises static sealing ring 55 and lower pipe nipple 56 in transmission shaft shell 31, power transmission shaft 33, intermediate seal group dynamic seal ring 52, the outer static sealing ring 53 of intermediate seal group, lock sleeve 54, intermediate seal group; Lower pipe nipple 56 upper end endoporus installs 2 groups of intermediate seal group dynamic seal rings 52, coordinates form movable sealing with lock sleeve 54; Lower pipe nipple 56 external surface installs the outer static sealing ring 53 of 1 ~ 3 group of intermediate seal group, coordinates form static seal with transmission shaft shell 31; Lock sleeve 54 upper end endoporus installs static sealing ring 55 in 1 ~ 2 group of intermediate seal group, coordinates form static seal with power transmission shaft 33; Lower seal assembly 36 comprises power transmission shaft 33, lower pipe nipple 56, equilibrium pressure runner 57, sealing check (non-return) valve 58, lower seal control spring 59, lower seal group dynamic seal ring 60 and pipe close 61; Equilibrium pressure runner 57 is inner at lower short circuit 56, and sealing check (non-return) valve 58 and lower seal control spring 59 are arranged in equilibrium pressure runner 57 successively, and equilibrium pressure runner 57 lower end port installs pipe close 61; Lower seal assembly 36 endoporus installs 2 groups of lower seal group dynamic seal rings 60, coordinates form movable sealing with power transmission shaft 33.Upper seal assembly 34 upper end is drilling fluid, and lower seal assembly 36 lower end is the drilling fluid of drill bit ejection, between upper seal assembly 34 and intermediate seal assembly 35, and injects lubrication oil between intermediate seal assembly 35 and lower seal assembly 36; When there is pressure reduction upper seal assembly 34 both sides, upper sealing control spring 45 can compress or extend, and piston/cylinder 48 is slided up and down in annular space, to ensure that pressure at both sides balances; Instantly, when there is pressure reduction seal assembly 36 both sides, lower seal control spring 59 can extend or compress, and sealing check (non-return) valve 58 is slided up and down in equilibrium pressure runner 57, to ensure that pressure at both sides balances.This tool construction is simple, reliability is high, can improve application life, reduces and makes a trip and reduce drilling cost.Like this, the by-pass valve assembly of unidirectional bypass cooperatively interacts with one end of motor joint (43) and is connected, and the external screw thread of the lower end of the valve body of its bypass valve screws with the internal thread of the upper end of motor joint (43) and is connected; The other end of motor joint (43) cooperatively interacts with motor assembly and is connected, and the external screw thread of lower end of its motor joint (43) screws with the internal thread of one end of the housing of motor assembly and is connected.The helicoid hydraulic motor of unidirectional bypass rising, lower brill or pump pressure low time, pump pressure is not enough to elastic force and the stiction of the big spring overcome on bypass valve, spool is failure to actuate, spool bore on spool is communicated with the valve port on valve body, due to the pressure effect of the drilling fluid in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass, outwards promote valve rod, make one way valve be in out position, drilling fluid in the helicoid hydraulic motor of unidirectional bypass can flow in down-hole annular, ensures normal construction, when pump pressure improves, the power of pump function on spool is greater than elastic force and the stiction of the big spring on bypass valve, spool action, move downward, hole on spool and the valve port on valve body are in closed state, bypass valve is in off-position, drilling fluid in the helicoid hydraulic motor of unidirectional bypass is not communicated with mutually with down-hole annular, drilling fluid in the helicoid hydraulic motor of unidirectional bypass enters motor assembly, drive the helicoid hydraulic motor work of unidirectional bypass, simultaneously, due to the pressure effect of the liquid in down-hole annular, the valve rod of inside promotion one way valve, one way valve is in off-position, silt particle in effective prevention down-hole annular, the impurity such as screw thread film enter in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass by the valve port of bypass valve, decrease, screw rod drill bit number of times changed by lower brill, save drilling time, the Stability Analysis of Structures of the by-pass valve assembly of unidirectional bypass, operating efficiency is high.
Claims (2)
1. a helicoid hydraulic motor for unidirectional bypass, the helicoid hydraulic motor of its unidirectional bypass mainly comprises the by-pass valve assembly of unidirectional bypass, motor assembly, universal drive shaft assembly and driving-shaft assembly; The bypass valve of its unidirectional bypass, motor assembly, universal drive shaft assembly are connected from top to bottom successively with driving-shaft assembly; The by-pass valve assembly of unidirectional bypass comprises bypass valve and one way valve and upper pipe nipple; Bypass valve, primarily of valve body, spool, big spring and jump ring and ring washer composition, valve body has valve port; Described body cavity is provided with cylindrical channel with the level, and the step on its cylindrical channel is provided with two, and two steps are respectively the step of upper end and the step of lower end, and cylindrical channel is connected with valve port; The upper end of spool is provided with an outer step, and the lower end of spool is provided with a spool bore; Spool by big spring and cylindrical channel with the level in mating connection, like this, its spool is in the cylindrical channel of valve body, and its big spring is placed on spool, the spool of big spring between the outer step of spool and the step of the lower end of the cylindrical channel of valve body and valve body coordinate in the axial annular space that formed; The outside of the step of the upper end of the cylindrical channel of valve body is provided with jump-ring slot, ring washer is placed in spool outer end and on the step of the upper end of the cylindrical channel of valve body, jump ring is in jump-ring slot, and jump ring is pressed against on ring washer, thus fixing ring washer, its spool is below ring washer; The upper end of valve body is provided with internal thread, and the lower end of valve body is provided with external screw thread; When bypass valve is installed, first big spring is put in valve body, again spool is installed, namely spool is arranged in the cylindrical channel of valve body, and make big spring be placed on spool, ring washer is placed on the step of the upper end of its cylindrical channel of spool outer end, finally jump ring is arranged in jump-ring slot, make jump ring be pressed against on ring washer, ring washer is fixed; When using bypass valve, its spool bore is communicated with the valve port on valve body, and bypass valve is just in out position; One way valve comprises body, valve rod, little spring, nut, and described body is provided with the cavity of hollow, and described body is provided with interior shoulder in the middle part of inwall; Described valve rod is T-type structure, and described valve rod comprises sealed end and the body of rod, and the external diameter of described sealed end is less than the internal diameter of cavity and is greater than the internal diameter of interior shoulder, and the external diameter of the described body of rod is less than the internal diameter of interior shoulder, and the described body of rod is placed in interior shoulder; The described body of rod is provided with away from one end of sealed end the screw thread matched with described nut, and the body of rod to be cooperatively interacted with nut by screw thread away from one end of sealed end and is connected, and the external diameter of described nut is greater than the internal diameter of interior shoulder and is less than the internal diameter of cavity; Described little spring is sleeved on the body of rod between interior shoulder and nut; The described body of rod is provided with the righting board being evenly equipped with through hole between interior shoulder and little spring, and righting board is sleeved on the body of rod, and described righting board, both by drilling fluid, also can limit the radial scope of activities of valve rod; Described interior shoulder offers seal groove on the table top of sealed end, is provided with sealing ring in described seal groove; Hexagonal structure in one end tool of described body, the Single port of the interior hexagonal structure of described body is the collar extension of body, and the another port of body is the internal orifice of body, and the collar extension of body is referred to as the collar extension of one way valve, and the internal orifice of body is referred to as the internal orifice of one way valve; The collar extension of its sealed end, body is positioned at the side of the shoulder in the middle part of the inwall of body, and the internal orifice of nut, little spring and righting board, body is positioned at the opposite side of the shoulder in the middle part of the inwall of body; First sealing ring is arranged in seal groove during installation, then valve rod is placed in body cavity by sealing ring side, from the opposite side of body cavity, righting board, little spring, nut are installed successively; Motor assembly mainly comprises motor joint, anti-lost assembly, stator case, rubber bushing, hollow rotor and rotor flow tract; The upper and lower two ends of motor joint are connected with the lower end of the valve body of bypass valve and stator case respectively; The sulfuration of stator case endoporus has rubber bushing, and hollow rotor screws in stator case endoporus, coordinates with rubber bushing; Anti-lost assembly lower end is connected with hollow rotor, and there are 2 ~ 3 rotor flow tracts hollow rotor lower end; Universal drive shaft assembly mainly comprises universal shaft housing, stop collar, upper petal ball pivot, pressure-bearing ball, ball seat connecting rod, lower petal ball pivot and water cap; Universal shaft housing upper end is connected with stator case, and upper petal ball pivot is connected with hollow rotor; The upper and lower two ends of ball seat connecting rod coordinate with upper petal ball pivot and lower petal ball pivot respectively, and stop collar is connected with ball seat connecting rod, petal ball pivot movement upwards in restriction; Pressure-bearing ball is arranged on ball seat connecting rod and coordinates with upper petal ball pivot in the hole that formed, and water cap is connected with lower petal ball pivot; Driving-shaft assembly mainly comprises transmission shaft shell, power transmission shaft, upper seal assembly, intermediate seal assembly, lower seal assembly and lower pipe nipple; Transmission shaft shell upper end is connected with universal shaft housing, and lower end is connected with lower pipe nipple, and power transmission shaft is connected with water cap; Upper seal assembly is arranged on transmission shaft shell and power transmission shaft coordinates in the annular space of formation; Intermediate seal assembly is arranged in the middle part of driving-shaft assembly, and lower seal assembly is arranged on driving-shaft assembly lower end; Anti-lost assembly is made up of anti-lost nut, anti-lost pull bar; Anti-lost pull bar upper end is connected with anti-lost nut, and lower end is connected with hollow rotor; The position that described upper petal ball pivot and lower petal ball pivot are connected with ball seat connecting rod is 4 ~ 6 petal splines; Power transmission shaft is connected contact position by disc spring supporting and location with water cap; Described upper seal assembly comprises static sealing ring in power transmission shaft, upper sealing control spring, sleeve, upper seal group, piston/cylinder, upper seal group dynamic seal ring, the outer static sealing ring of upper seal group and bearing; Sleeve outer surface contacts with piston/cylinder, and inner surface contacts with power transmission shaft, and in hub internal bore installation 2 ~ 4 groups, static sealing ring in seal group, coordinates with power transmission shaft and form static seal; Seal group dynamic seal ring and bearing in piston/cylinder endoporus installation 2 ~ 3 groups, the outer static sealing ring of seal group in external surface installation 2 ~ 4 groups; Upper sealing control spring is arranged on piston/cylinder upper end; Intermediate seal assembly comprises static sealing ring and lower pipe nipple in transmission shaft shell, power transmission shaft, intermediate seal group dynamic seal ring, the outer static sealing ring of intermediate seal group, lock sleeve, intermediate seal group; Lower pipe nipple upper end endoporus installs 2 groups of intermediate seal group dynamic seal rings, coordinates form movable sealing with lock sleeve; Lower pipe nipple external surface installs the outer static sealing ring of 1 ~ 3 group of intermediate seal group, coordinates form static seal with transmission shaft shell; Lock sleeve upper end endoporus installs static sealing ring in 1 ~ 2 group of intermediate seal group, coordinates form static seal with power transmission shaft; Lower seal assembly comprises power transmission shaft, lower pipe nipple, equilibrium pressure runner, sealing check (non-return) valve, lower seal control spring, lower seal group dynamic seal ring and pipe close; Equilibrium pressure runner is inner at lower short circuit, and sealing check (non-return) valve and lower seal control spring are arranged in equilibrium pressure runner successively, and equilibrium pressure runner lower end port installs pipe close; Lower seal assembly endoporus installs 2 ~ 3 groups of lower seal group dynamic seal rings, coordinates form movable sealing with power transmission shaft; The contact surface of described sleeve and piston/cylinder plates one deck chromium, and its thickness is 0.05 ~ 0.20mm, to increase Corrosion Protection and the abrasion resistance of contact surface; Like this, the by-pass valve assembly of unidirectional bypass cooperatively interacts with one end of motor joint and is connected, and the external screw thread of the lower end of the valve body of its bypass valve screws with the internal thread of the upper end of motor joint and is connected; The other end of motor joint cooperatively interacts with motor assembly and is connected, and the external screw thread of the lower end of its motor joint screws with the internal thread of one end of the housing of motor assembly and is connected; It is characterized in that: one way valve cooperatively interacts with bypass valve and is connected, make one way valve be arranged in the valve port of bypass valve, the collar extension of the collar extension of its one way valve and the valve port of bypass valve directly interlinks, and the internal orifice of the internal orifice of one way valve and the valve port of bypass valve directly interlinks.
2. durable and efficient helicoid hydraulic motor according to claim 1, it is characterized in that: the body outer tube wall of one way valve is provided with connection external screw thread, the inwall of the valve port of bypass valve is provided with connection internal thread, connection internal thread on the inwall of the connection external screw thread of the body outer tube wall of its one way valve and the valve port of bypass valve screws connection, tighten one way valve with instrument by hexagonal structure in one end of body thus make one way valve be fixed in the valve port of bypass valve, like this, by connecting internal thread and being connected external screw thread one way valve is arranged on the valve port of bypass valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394629.9A CN105317372A (en) | 2014-08-02 | 2014-08-02 | One-way bypass screw drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394629.9A CN105317372A (en) | 2014-08-02 | 2014-08-02 | One-way bypass screw drilling tool |
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| CN105317372A true CN105317372A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410394629.9A Pending CN105317372A (en) | 2014-08-02 | 2014-08-02 | One-way bypass screw drilling tool |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735925A (en) * | 2016-04-29 | 2016-07-06 | 天津立林石油机械有限公司 | Semi-closed piston bypass valve for screw rod drilling tool |
| CN108166940A (en) * | 2017-12-25 | 2018-06-15 | 中国石油大学(华东) | A kind of by-pass valve of screwdrill and its application method with huge discharge shunting function |
| CN112252963A (en) * | 2020-09-24 | 2021-01-22 | 盐城市新永佳石油机械制造有限公司 | Novel combined drilling tool |
| CN112377090A (en) * | 2020-10-27 | 2021-02-19 | 中煤科工集团西安研究院有限公司 | Spray lubrication drill rod |
| WO2023196393A1 (en) * | 2022-04-06 | 2023-10-12 | Baker Hughes Oilfield Operations Llc | Indexing injection valve, method, and system |
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2014
- 2014-08-02 CN CN201410394629.9A patent/CN105317372A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735925A (en) * | 2016-04-29 | 2016-07-06 | 天津立林石油机械有限公司 | Semi-closed piston bypass valve for screw rod drilling tool |
| CN108166940A (en) * | 2017-12-25 | 2018-06-15 | 中国石油大学(华东) | A kind of by-pass valve of screwdrill and its application method with huge discharge shunting function |
| CN108166940B (en) * | 2017-12-25 | 2018-11-06 | 中国石油大学(华东) | A kind of by-pass valve of screwdrill and its application method with huge discharge shunting function |
| CN112252963A (en) * | 2020-09-24 | 2021-01-22 | 盐城市新永佳石油机械制造有限公司 | Novel combined drilling tool |
| CN112252963B (en) * | 2020-09-24 | 2023-06-23 | 盐城市新永佳石油机械制造有限公司 | Novel combined drilling tool |
| CN112377090A (en) * | 2020-10-27 | 2021-02-19 | 中煤科工集团西安研究院有限公司 | Spray lubrication drill rod |
| CN112377090B (en) * | 2020-10-27 | 2022-05-10 | 中煤科工集团西安研究院有限公司 | Spray lubrication drill rod |
| WO2023196393A1 (en) * | 2022-04-06 | 2023-10-12 | Baker Hughes Oilfield Operations Llc | Indexing injection valve, method, and system |
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Application publication date: 20160210 |