CN105888537A - One-way bypass screw drill - Google Patents
One-way bypass screw drill Download PDFInfo
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- CN105888537A CN105888537A CN201410729762.5A CN201410729762A CN105888537A CN 105888537 A CN105888537 A CN 105888537A CN 201410729762 A CN201410729762 A CN 201410729762A CN 105888537 A CN105888537 A CN 105888537A
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Abstract
A one-way bypass screw drill mainly comprises a bypass valve assembly of a one-way bypass, a motor assembly, a cardan shaft assembly and a transmission shaft assembly. The bypass valve assembly of the one-way bypass comprises a bypass valve and a one-way valve. The bypass valve is mainly composed of a valve body, a valve element, a large spring, a valve port, a snap spring and a check ring. The one-way valve comprises a body, a valve rod, a small spring and a nut. The one-way valve and the bypass valve are connected in a matched mode. A connection external thread is arranged on the outer pipe wall of a body of the one-way valve, a connection internal thread is arranged on the inner wall of the valve port of the bypass valve, the one-way valve is installed on the valve port of the bypass valve through the connection external thread and the connection internal thread, and therefore the one-way valve is installed in the valve port of the bypass valve, an outer opening of the one-way valve is directly communicated with an outer opening of the valve port of the bypass valve, and the inner opening of the one-way valve is directly communicated with an inner opening of the valve port of the bypass valve. The one-way bypass screw drill achieves one-way bypassing, and is simple in structure and high in reliability, the service life can be prolonged, and 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 especially suitable for gas base flow body and bore
The spiral shell of a kind of unidirectional bypass used in the probing of the mud medium deep-well of well technique and high temperature strong vibration, ultradeep well
Bar drill has.
Background technology
Helicoid hydraulic motor is that in Present Domestic outer oil, gas drilling field, most widely used a kind of down-hole is moved
Power drilling tool, along with the development of modern drilling technology, especially with the popularization of combined drilling, screw drill
The function that tool is played the part of in drillng operation gets more and more, and acts on the most increasing.Helicoid hydraulic motor mainly includes side
Logical valve assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly；Its by-pass valve assembly, motor assembly,
Universal drive shaft assembly and driving-shaft assembly are sequentially connected with from top to bottom.By-pass valve assembly is the weight of composition helicoid hydraulic motor
One of parts, by-pass valve assembly are wanted to include by-passing valve and upper pipe nipple.By-passing valve rise, lower bore time be in open position,
In making drill string, drilling fluid communicates with down-hole annular.At present, the by-passing valve of general helicoid hydraulic motor, mainly by valve
Body, spool, spring, valve port and jump ring and back-up ring composition, body cavity is provided with cylinder with the level and leads to
Road, cylindrical channel is connected with valve port, and spool is matched with cylindrical channel with the level by spring,
The lower end of spool is provided with spool bore, and when spool bore connects with the valve port on valve body, by-passing valve is in open position.Mesh
Before, the by-passing valve valve port of its general helicoid hydraulic motor has a filter screen, and is two-way straight-through, i.e. its screw drill
Tool for two-way bypass, so lower brill, creep into, make up a joint, during termination of pumping, the often mud in down-hole annular
The impurity such as sand, screw thread film can be entered in drilling tool water hole by the filter screen of the valve port of screw rod by-passing valve, causes screw rod
Drilling tool is stuck, helicoid hydraulic motor damages in advance, bit port blocks, directional well instrument in drilling tool water hole is stuck
Etc. accident, bring huge economic loss.
The problem that the present invention is directed to the existence of current helicoid hydraulic motor has carried out corresponding Optimal improvements, the spiral shell after improvement
Bar drill has the advantage of unidirectional bypass, provide technical support and guarantee for drilling well, it is to avoid screw deadlocking, spiral shell
Bar damages in advance, bit port blocks, directional well instrumentation card in drilling tool water hole waits indefinitely accident.
Summary of the invention
It is an object of the invention to provide the helicoid hydraulic motor of a kind 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, thus lower brill, creep into,
Make up a joint, during termination of pumping, the impurity such as silt particle in down-hole annular, screw thread film can not be by the list of helicoid hydraulic motor
Valve port to the by-passing valve of bypass enters in drilling tool water hole；Avoid screw deadlocking, screw rod damages in advance, bore
Head hydrophthalmia blocks, directional well instrumentation card in drilling tool water hole waits indefinitely accident；And its simple in construction, stable,
Rationally.
The object of the present invention is achieved like this: the helicoid hydraulic motor of a kind of unidirectional bypass, the spiral shell of its unidirectional bypass
Bar drill tool mainly includes the by-pass valve assembly of unidirectional bypass, motor assembly, universal drive shaft assembly and driving-shaft assembly；
The by-passing valve of its unidirectional bypass, motor assembly, universal drive shaft assembly and driving-shaft assembly are sequentially connected with from top to bottom.
The by-pass valve assembly of unidirectional bypass includes by-passing valve and check valve and upper pipe nipple.By-passing valve mainly by valve body,
Spool, big spring and jump ring and back-up ring composition, valve body has valve port；Described body cavity is provided with band platform
The cylindrical channel on rank, the step on its cylindrical channel is provided with two, and two steps are respectively the platform of upper end
Rank and the step of lower end, cylindrical channel is connected with valve port；The upper end of spool is provided with an outer step, valve
The lower end of core is provided with a spool bore；Spool is in mating connection with cylindrical channel with the level by big spring,
So, its spool is in the cylindrical channel of valve body, and its big spring is placed on spool, and big spring is at valve
The axle that spool between the step of the lower end of the outer step of core and the cylindrical channel of valve body and valve body cooperatively form
In annular space；The outside of the step of the upper end of the cylindrical channel of valve body is provided with jump-ring slot, and back-up ring is placed in valve
Core outer end on the step of the upper end of the cylindrical channel of valve body, jump ring is in jump-ring slot, and jump ring
It is pressed against on back-up ring, thus fixing back-up ring, its spool is below back-up ring；The upper end of valve body is provided with internal thread,
The lower end of valve body is provided with external screw thread.When by-passing valve is installed, first big spring is put in valve body, then spool is installed,
I.e. spool is arranged in the cylindrical channel of valve body, and makes big spring be placed on spool, back-up ring is laid
On the step of the upper end of its cylindrical channel of spool outer end, finally jump ring is arranged in jump-ring slot, makes card
Spring is pressed against on back-up ring, makes back-up ring fix.When using by-passing valve, its spool bore connects with the valve port on valve body,
By-passing valve is at open position.Check valve includes body, valve rod, little spring, nut, 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 in the middle part of inwall
Shoulder；Described valve rod is T-type structure, and described valve rod includes sealed end and the body of rod, and the external diameter of described sealed end is little
Internal diameter in cavity and the internal diameter more than interior shoulder, the external diameter of the described body of rod is less than the internal diameter of interior shoulder, described
The body of rod is placed on the interior of interior shoulder.The described body of rod is provided with, away from one end of sealed end, the spiral shell matched with described nut
Line, the body of rod is cooperated with nut by screw thread away from one end of sealed end and is connected, and the external diameter of described nut is big
Internal diameter in interior shoulder and the internal diameter less than cavity；Described little spring is sleeved on the bar between interior shoulder and nut
On body.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 set with
On the body of rod, described righting board both can pass through drilling fluid, also can limit the radially movable scope of valve rod.In described
Shoulder offers seal groove on the table top of sealed end, is provided with sealing ring in described seal groove.Described body
One end tool in hexagonal structure, the collar extension that Single port is body of the interior hexagonal structure of described body, body
Another port is the internal orifice of body, and the collar extension of body is referred to as the collar extension of check valve, and the internal orifice of body is referred to as
The internal orifice of check valve；Its sealed end, the collar extension of body are positioned at the side of the shoulder in the middle part of the inwall of body,
Nut, little spring and righting board, the internal orifice of body are 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 body by sealing ring side,
From the opposite side of body cavity, righting board, little spring, nut are installed successively.On the inwall of the valve port of by-passing valve
Being provided with connection internal thread, check valve cooperates with by-passing valve and is connected, and makes check valve be arranged on the valve of by-passing valve
In mouthful, the collar extension of its check valve directly interlinks with the collar extension of the valve port of by-passing valve, and the internal orifice of check valve is with other
The internal orifice of the valve port of logical valve directly interlinks, the connection external screw thread of the body outer tube wall of its check valve and by-passing valve
Valve port inwall on connection internal thread screw connection, with the instrument interior hexagonal structure by one end of body
Tighten check valve so that check valve is fixed in the valve port of by-passing valve, so, by connect internal thread and
Connect external screw thread to be arranged on the valve port of by-passing valve by check valve.Motor assembly mainly includes motor joint, prevents
Fall assembly, stator case, rubber bushing, hollow rotor and rotor flow tract；The upper and lower two ends of motor joint are respectively
It is connected with lower end and the stator case of the valve body of by-passing valve；The sulfuration of stator case endoporus has rubber bushing, hollow
Rotor screws in stator case endoporus, coordinates with rubber bushing；Anti-lost assembly lower end is connected with hollow rotor, in
There are 2～3 rotor flow tracts sub-lower end of dallying；Universal drive shaft assembly mainly include universal shaft housing, stop collar, on
Petal ball pivot, pressure-bearing ball, ball seat connecting rod, lower petal ball pivot and water cap；Universal shaft housing upper end and stator case
Body connects, and upper petal ball pivot is connected with hollow rotor；The upper and lower two ends of ball seat connecting rod respectively with upper petal ball pivot and
Lower petal ball pivot coordinates, and stop collar is connected with ball seat connecting rod, petal ball pivot movement upwards in restriction；Pressure-bearing
Ball is arranged in the hole that ball seat connecting rod and upper petal ball pivot cooperatively form, and water cap is connected with lower petal ball pivot；Pass
Moving axis assembly mainly includes 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, transmission
Axle and water cap connect；In the annular space that upper seal assembly is arranged on transmission shaft shell and power transmission shaft cooperatively forms；In
Between seal assembly be arranged in the middle part of driving-shaft assembly, 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, lower end and hollow
Rotor connects；The position that described upper petal ball pivot and lower petal ball pivot are connected with ball seat connecting rod is 4～6 petals
Shape spline；Power transmission shaft and water cap connect contact position and support location by disc spring.Described upper seal assembly includes transmission
In axle, upper sealing control spring, sleeve, upper sealing group, static sealing ring, piston/cylinder, upper sealing group are moved close
Seal, the outer static sealing ring of upper sealing group and bearing；Sleeve outer surface contacts with piston/cylinder, inner surface and biography
Moving axis contacts, and in hub internal bore installation 2～4 groups, static sealing ring in sealing group, cooperatively forms quiet close with power transmission shaft
Envelope；Sealing group dynamic seal ring and bearing in piston/cylinder endoporus installation 2～3 groups, outer surface installs 2～4 groups
The outer static sealing ring of upper sealing group；The upper control spring that seals is arranged on piston/cylinder upper end；Intermediate seal assembly bag
Include transmission shaft shell, power transmission shaft, intermediate seal group dynamic seal ring, intermediate seal group outer static sealing ring, locking
Static sealing ring and lower pipe nipple in set, intermediate seal group；Lower pipe nipple upper end endoporus is installed 2 groups of intermediate seal groups and is moved
Sealing ring, cooperatively forms movable sealing with lock sleeve；It is outer quiet that lower pipe nipple outer surface installs 1～3 group of intermediate seal group
Sealing ring, cooperatively forms static seal with transmission shaft shell；Lock sleeve upper end endoporus installs 1～2 group of intermediate seal
Static sealing ring in group, cooperatively forms static seal with power transmission shaft；Lower seal assembly include power transmission shaft, lower pipe nipple,
Balance pressure runner, sealing check (non-return) valve, lower seal control spring, lower seal group dynamic seal ring and pipe close；Flat
Weighing apparatus pressure runner, inside lower short circuit, seals check (non-return) valve and lower seal controls spring and is sequentially arranged at balance pressure
In runner, balance pressure runner lower end port installs pipe close；Lower seal assembly endoporus installs 2～3 groups of lower seals
Group dynamic seal ring, cooperatively forms movable sealing with power transmission shaft.Described sleeve plates one layer with the contact surface of piston/cylinder
Chromium, its thickness is 0.05～0.20mm, to increase Corrosion Protection and the wearability of contact surface.So, single
By-pass valve assembly to bypass cooperates with one end of motor joint and to be connected, the lower end of the valve body of its by-passing valve
External screw thread screw with the internal thread of the upper end of motor joint and be connected；The other end of motor joint and motor assembly
Cooperate connection, the internal thread of one end of the external screw thread of the lower end of its motor joint and the housing of motor assembly
Screw connection.The helicoid hydraulic motor of unidirectional bypass rising, lower brill or when being pumped low, pump pressure is not enough to overcome bypass
The elastic force of the big spring on valve and stiction, spool is failure to actuate, the spool bore on spool and the valve on valve body
Mouth connection, due to the pressure effect of the drilling fluid in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass, pushes out valve rod,
Making check valve be in open position, the drilling fluid in the helicoid hydraulic motor of unidirectional bypass can flow in down-hole annular, protects
Card normal construction；When pump pressure improves, pump function power on spool is more than the big spring on by-passing valve
Elastic force and stiction, spool action, move downward, the hole on spool is in closing with the valve port on valve body
State, by-passing valve is in off-position, makes the drilling fluid in the helicoid hydraulic motor of unidirectional bypass not connect mutually with down-hole annular
Logical, the drilling fluid in the helicoid hydraulic motor of unidirectional bypass enters motor assembly, drives the helicoid hydraulic motor of unidirectional bypass
Work, simultaneously as the pressure effect of the liquid in down-hole annular, inwardly promotes the valve rod of check valve, single
It is in off-position to valve, effectively stops the impurity valve ports by by-passing valve such as the silt particle in down-hole annular, screw thread film
Enter in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass, decreased, lower bore change screw rod drill bit number of times, save
Drilling time, the Stability Analysis of Structures of the by-pass valve assembly of unidirectional bypass, operating efficiency is high.So, its unidirectional side
Logical helicoid hydraulic motor achieves unidirectional bypass, thus reaches the purpose of the present invention.
Owing to have employed technique scheme, the helicoid hydraulic motor of described unidirectional bypass not only achieves unidirectional side
Logical, overcome the two-way straight-through defect of valve port of general by-passing valve, at lower brill, creep into, make up a joint, stop
During pump, the impurity such as silt particle in down-hole annular, screw thread film can not be by the side of the unidirectional bypass of helicoid hydraulic motor
The valve port of logical valve enters in drilling tool water hole；Avoid screw deadlocking, screw rod damages in advance, bit port blocks,
Directional well instrumentation card in drilling tool water hole is waited indefinitely accident.This tool construction is simple, reliability is high, can improve
In service life, reduce and make a trip and reduce drilling cost.
Accompanying drawing explanation
Fig. 1 is the structure of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
Schematic diagram；
Fig. 2 is the unidirectional of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of the by-pass valve assembly of bypass；
Fig. 3 is the unidirectional of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of the check valve of the by-pass valve assembly of bypass.
Fig. 4 is the motor of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of assembly；
Fig. 5 is the universal of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of axle assembly；
Fig. 6 is the transmission of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of axle assembly；
Fig. 7 is the transmission of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of the upper seal assembly of axle assembly；
Fig. 8 is the transmission of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of the intermediate seal assembly of axle assembly；
Fig. 9 is the transmission of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of the lower seal assembly of axle assembly.
Figure 10 is the anti-lost of the helicoid hydraulic motor of the unidirectional bypass of helicoid hydraulic motor embodiment of a kind of unidirectional bypass of the present invention
The structural representation of assembly.
In figure: the by-pass valve assembly of the most unidirectional bypass, 2. motor assembly, 3. universal drive shaft assembly, 4. power transmission shaft is total
Become, 5. go up pipe nipple, the 6. internal thread of by-passing valve, 7. valve body, 8. spool, 9. big spring, 10. check valve,
11. valve ports, 12. spool bore, the external screw thread of 13. by-passing valves, the body of rod of the valve rod of 14. check valves, 15. is single
To the nut of valve, the body of 16. check valves, the sealing ring of 17. check valves, on the righting board of 18. check valves
Through hole, 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 flowers
Lobe ball pivot, 30. water caps, 31. transmission shaft shell, 32. disc springs, 33. power transmission shafts, seal assembly on 34., 35.
Intermediate seal assembly, 36. lower seal assemblies, 37. anti-lost nuts, the righting board of 38. check valves, 39. is unidirectional
The sealed end of the valve rod of valve, the little spring of 40. check valves, the back-up ring of 41. by-passing valves, the card of 42. by-passing valves
Spring, 43. motor joints, 44. anti-lost pull bars, seal on 45. and control spring, 46. sleeves, on 47. in sealing group
Static sealing ring, 48. piston/cylinders, sealing group dynamic seal ring on 49., the outer static sealing ring of sealing group on 50., 51.
Bearing, 52. intermediate seal group dynamic seal rings, the outer static sealing ring of 53. intermediate seal groups, 54. lock sleeves, in 55.
Between static sealing ring in sealing group, 56. times pipe nipples, 57. balance pressure runners, 58. seal check (non-return) valves, and 59. times are close
Sealed spring processed, 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 a kind of unidirectional bypass of the present invention, mainly include unidirectional bypass
By-pass valve assembly 1, motor assembly 2, universal drive shaft assembly 3 and driving-shaft assembly 4.The by-passing valve of unidirectional bypass
Assembly 1, motor assembly 2, universal drive shaft assembly 3 and driving-shaft assembly 4 are sequentially connected with from top to bottom；Unidirectional side
Logical by-pass valve assembly includes by-passing valve and check valve 10 and upper pipe nipple 5.By-passing valve mainly by valve body 7,
Spool 8, big spring 9 and jump ring 42 and back-up ring 41 form, and valve body 7 has valve port 11；Described valve
Intracoelomic cavity is provided with cylindrical channel with the level, and the step on its cylindrical channel is provided with two, two steps
Being respectively step and the step of lower end of upper end, cylindrical channel is connected with valve port；The upper end of spool is provided with
One outer step, the lower end of spool is provided with a spool bore 12；Spool is by big spring and cylinder with the level
Shape passage is in mating connection, and so, its spool is in the cylindrical channel of valve body, and its big spring is placed on
On spool, big spring spool between the step of the outer step of spool and the lower end of the cylindrical channel of valve body
In the axial annular space cooperatively formed with valve body；The outside of the step of the upper end of the cylindrical channel of valve body is provided with card
Spring groove, back-up ring is placed in spool outer end and on the step of the upper end of the cylindrical channel of valve body, and jump ring exists
In jump-ring slot, and jump ring is pressed against on back-up ring, thus fixing back-up ring, its spool is below back-up ring；Valve
The upper end of body is provided with internal thread, and the lower end of valve body is provided with external screw thread 13.When installing by-passing valve, first big spring
In threading valve body, then spool is installed, i.e. spool is arranged in the cylindrical channel of valve body, and make big bullet
Spring is placed on spool, on the step of the upper end that back-up ring is placed in its cylindrical channel of spool outer end, and finally handle
Jump ring is arranged in jump-ring slot, makes jump ring be pressed against on back-up ring, makes back-up ring fix.When using by-passing valve, its
Spool bore connects with the valve port on valve body, and by-passing valve is at open position.Check valve 10 include body 16, valve rod,
Little spring 40, nut 15, wherein, body outer tube wall is provided with connection external screw thread, and described body is provided with hollow
Cavity, described body is provided with interior shoulder in the middle part of inwall；Described valve rod is T-type structure, and described valve rod includes
Sealed end 39 and the body of rod 14, the external diameter of the described sealed end internal diameter less than cavity and the internal diameter more than interior shoulder,
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 on the interior of interior shoulder.The described body of rod away from
One end of sealed end is provided with the screw thread matched with described nut, and the body of rod passes through screw thread away from one end of sealed end
Cooperate with nut and be connected, the external diameter of the described nut internal diameter more than interior shoulder and the internal diameter less than cavity；
Described little spring is sleeved on the body of rod between interior shoulder and nut.The described body of rod in interior shoulder and little spring it
Between be provided with the righting board 38 being evenly equipped with through hole 18, righting board is sleeved on the body of rod, and described righting board both can pass through
Drilling fluid, also can limit the radially movable scope of valve rod.Described interior shoulder offers on the table top of sealed end
Seal groove, is provided with sealing ring 17 in described seal groove.Hexagonal structure in one end tool of described body, described
The collar extension that Single port is body of the interior hexagonal structure of body, the another port of body is the internal orifice of body, body
Collar extension be referred to as the collar extension of check valve, the internal orifice of body is referred to as the internal orifice of check valve；Its sealed end, basis
The collar extension of body is positioned at the side of the shoulder in the middle part of the inwall of body, nut, little spring and righting board, basis
The internal orifice of body is positioned at the opposite side of the shoulder in the middle part of the inwall of body；First sealing ring is arranged on close during installation
In sealing groove, then valve rod is placed in body cavity body by sealing ring side, pacifies successively from the opposite side of body cavity
Dress righting board, little spring, nut.The inwall of the valve port of by-passing valve is provided with connection internal thread, check valve with
By-passing valve cooperates connection, makes check valve be arranged in the valve port of by-passing valve, and the collar extension of its check valve is with other
The collar extension of the valve port of logical valve directly interlinks, and the internal orifice of check valve directly communicates with the internal orifice of the valve port of by-passing valve
Even, spiral shell in the connection on the inwall of the valve port connecting external screw thread and by-passing valve of the body outer tube wall of its check valve
Line screws connection, tightens check valve with instrument by the interior hexagonal structure of one end of body so that check valve
It is fixed in the valve port of by-passing valve, so, by connecting internal thread and connection external screw thread, check valve is arranged on
On the valve port of by-passing valve.Motor assembly 2 mainly include 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 respectively with by-passing valve
The lower end of valve body and stator case 20 connect；The sulfuration of stator case 20 endoporus has rubber bushing 21, hollow
Rotor 22 screws in stator case 20 endoporus, coordinates with rubber bushing 21；Anti-lost assembly 19 lower end and hollow
Rotor 22 connects, and there are 2～3 rotor flow tracts 23 hollow rotor 22 lower end；Universal drive shaft assembly 3 mainly includes
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, upper petal ball pivot 26 with
Hollow rotor 22 connects；Ball seat connecting rod about 28 two ends respectively with upper petal ball pivot 26 and lower petal ball pivot 29
Coordinating, stop collar 25 is connected with ball seat connecting rod 28, petal ball pivot 26 movement upwards in restriction；Pressure-bearing ball
27 are arranged in the hole that ball seat connecting rod 28 and upper petal ball pivot 26 cooperatively form, water cap 30 and lower petal ball pivot
29 connect；Driving-shaft assembly 4 mainly include 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 and universal axle housing
Body 24 connects, and lower end is connected with lower pipe nipple 56, and power transmission shaft 33 and water cap 30 connect；Upper seal assembly 34
It is arranged on transmission shaft shell 31 and in annular space that power transmission shaft 33 cooperatively forms；Intermediate seal assembly 35 is arranged on
In the middle part of driving-shaft assembly 4, lower seal assembly 36 is arranged on driving-shaft assembly 4 lower end.Described anti-lost assembly
19 are 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,
Lower end is connected with hollow rotor 22；Described upper petal ball pivot 26 and lower petal ball pivot 29 and ball seat connecting rod 28
The position connected is 4～6 petal splines；Power transmission shaft 33 and water cap 30 connect contact position by disc spring 32
Supporting location, power transmission shaft 33 threaded upper ends can be played cushioning effect by disc spring 32, it is to avoid occur at screw thread
Fracture and screw thread are threaded off.Described upper seal assembly 34 includes that power transmission shaft 33, upper sealing control spring 45, set
Static sealing ring 47, piston/cylinder 48, upper sealing group dynamic seal ring 49, upper sealing in cylinder 46, upper sealing group
Organize outer static sealing ring 50 and bearing 51；Sleeve 46 outer surface contacts with piston/cylinder 48, inner surface and transmission
Axle 33 contacts, and sleeve 46 endoporus installs on 4 groups static sealing ring 47 in sealing group, coordinates shape with power transmission shaft 33
Becoming static seal, sleeve 46 to plate one layer of chromium with the contact surface of piston/cylinder 48, its thickness is 0.05～0.20mm,
To increase Corrosion Protection and the wearability of contact surface；Piston/cylinder 48 endoporus is installed sealing group on 2 groups and is moved close
Seal 49 and bearing 51, outer surface installs the outer static sealing ring 50 of sealing group on 4 groups；Upper sealing controls spring
45 are arranged on piston/cylinder 48 upper end；Intermediate seal assembly 35 include transmission shaft shell 31, power transmission shaft 33,
In intermediate seal group dynamic seal ring 52, intermediate seal group outer static sealing ring 53, lock sleeve 54, intermediate seal group
Static sealing ring 55 and lower pipe nipple 56；Lower pipe nipple 56 upper end endoporus installs 2 groups of intermediate seal group dynamic seal rings 52,
Movable sealing is cooperatively formed with lock sleeve 54；It is outer quiet close that lower pipe nipple 56 outer surface installs 1～3 group of intermediate seal group
Seal 53, cooperatively forms static seal with transmission shaft shell 31；During lock sleeve 54 upper end endoporus installs 1～2 group
Between static sealing ring 55 in sealing group, cooperatively form static seal with power transmission shaft 33；Lower seal assembly 36 includes passing
Moving axis 33, lower pipe nipple 56, balance pressure runner 57, seal check (non-return) valve 58, lower seal control spring 59,
Lower seal group dynamic seal ring 60 and pipe close 61；Balance pressure runner 57, inside lower short circuit 56, seals non-return
Valve 58 and lower seal control spring 59 and are sequentially arranged in balance pressure runner 57, balance 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, with
Power transmission shaft 33 cooperatively forms movable sealing.Upper seal assembly 34 upper end is drilling fluid, lower seal assembly 36 times
Hold the drilling fluid for drill bit ejection, between upper seal assembly 34 and intermediate seal assembly 35 and middle close
Lubricating oil is injected between envelope assembly 35 and lower seal assembly 36；When there is pressure reduction upper seal assembly 34 both sides,
The upper control spring 45 that seals can compress or extend, and makes piston/cylinder 48 slide up and down in annular space, to protect
Card pressure at both sides balance；Instantly, when there is pressure reduction seal assembly 36 both sides, lower seal controls spring 59 and can extend
Or compression, makes sealing check (non-return) valve 58 slide up and down, to ensure pressure at both sides in balance pressure runner 57
Balance.This tool construction is simple, reliability is high, can improve service life, reduces and makes a trip and reduce brill
Enter cost.So, the by-pass valve assembly of unidirectional bypass cooperates with one end of motor joint 43 and is connected, its
The external screw thread of the lower end of the valve body of by-passing valve screws with the internal thread of the upper end of motor joint 43 and is connected；Motor connects
The other end of 43 cooperates with motor assembly and is connected, the external screw thread of the lower end of its motor joint 43 and horse
The internal thread of the one end reaching the housing of assembly screws connection.The helicoid hydraulic motor of unidirectional bypass rising, lower brill or pump
When forcing down, pump pressure is not enough to overcome elastic force and the stiction of the big spring on by-passing valve, and spool is failure to actuate,
Spool bore on spool connects with the valve port on valve body, due to the drilling well in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass
The pressure effect of liquid, pushes out valve rod, makes check valve be in open position, in the helicoid hydraulic motor of unidirectional bypass
Drilling fluid can flow in down-hole annular, it is ensured that normal construction；When pump pressure improves, pump function is at spool
On power more than the elastic force of the big spring on by-passing valve and stiction, spool action, move downward, spool
On hole and valve body on valve port be in closed state, by-passing valve is in off-position, makes the screw drill of unidirectional bypass
Drilling fluid in tool does not connects mutually with down-hole annular, and the drilling fluid in the helicoid hydraulic motor of unidirectional bypass enters motor
Assembly, drives the helicoid hydraulic motor of unidirectional bypass to work, simultaneously as the pressure of the liquid in down-hole annular is made
With, inwardly promote the valve rod of check valve, check valve is in off-position, effectively stop the silt particle in down-hole annular,
The impurity such as screw thread film are entered in the helicoid hydraulic motor hydrophthalmia of unidirectional bypass by the valve port of by-passing valve, decreased,
Lower boring changes screw rod drill bit number of times, has saved 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 includes unidirectional bypass
By-pass valve assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly；The by-passing valve of its unidirectional bypass, horse
Reach assembly, universal drive shaft assembly and driving-shaft assembly to be sequentially connected with from top to bottom；The by-pass valve assembly of unidirectional bypass
Including by-passing valve and check valve and upper pipe nipple；By-passing valve mainly by valve body, spool, big spring and jump ring with
And back-up ring composition, valve body has valve port；Described body cavity is provided with cylindrical channel with the level, its circle
Step in cylindrical passageway is provided with two, and two steps are respectively the step of upper end and the step of lower end, cylinder
Shape passage 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
Hole；Spool is in mating connection with cylindrical channel with the level by big spring, and so, its spool is at valve body
Cylindrical channel in, and its big spring is placed on spool, and big spring is at the outer step of spool and valve body
In the axial annular space that spool between the step of the lower end of cylindrical channel and valve body cooperatively form；The circle of valve body
The outside of the step of the upper end of cylindrical passageway is provided with jump-ring slot, and back-up ring is placed in spool outer end the circle at valve body
Above the step of the upper end of cylindrical passageway, jump ring is in jump-ring slot, and jump ring is pressed against on back-up ring, thus
Fixing back-up ring, its spool is below back-up ring；The upper end of valve body is provided with internal thread, outside the lower end of valve body is provided with
Screw thread；Spool is arranged in the cylindrical channel of valve body, and makes big spring be placed on spool, is pacified by back-up ring
On the step of the upper end being put in its cylindrical channel of spool outer end, finally jump ring is arranged in jump-ring slot, makes
Jump ring is pressed against on back-up ring, makes back-up ring fix；When using by-passing valve, its spool bore is with the valve port on valve body even
Logical, by-passing valve is at open position；Check valve includes that body, valve rod, little spring, nut, described body set
The cavity of hollow, described body is had to be provided with interior shoulder in the middle part of inwall；Described valve rod is T-type structure, described
Valve rod includes 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 more than the interior of interior shoulder
Footpath, 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 on the interior of interior shoulder；The described body of rod
One end away from sealed end is provided with the screw thread matched with described nut, and the body of rod passes through away from one end of sealed end
Screw thread cooperates with nut and is connected, and the external diameter of described nut is more than the internal diameter of interior shoulder and is less than the interior of cavity
Footpath；Described little spring is sleeved on the body of rod between interior shoulder and nut；The described body of rod is in interior shoulder and little bullet
Being provided with the righting board being evenly equipped with through hole between spring, righting board is sleeved on the body of rod, and described righting board both can pass through
Drilling fluid, also can limit the radially movable scope of valve rod；Described interior shoulder offers on the table top of sealed end
Seal groove, is provided with sealing ring in described seal groove；Hexagonal structure in one end tool of described body, described body
The collar extension that Single port is body of interior hexagonal structure, the another port of body is the internal orifice of body, body
Collar extension is referred to as the collar extension of check valve, and the internal orifice of body is referred to as the internal orifice of check valve；Its sealed end, body
Collar extension be positioned at the side of the shoulder in the middle part of the inwall of body, nut, little spring and righting board, body
Internal orifice be positioned at the opposite side of the shoulder in the middle part of the inwall of body；Motor assembly mainly include 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 divided
Lower end and the stator case of the other valve body with by-passing valve are connected；The sulfuration of stator case endoporus has rubber bushing, in
Idle running screws in stator case endoporus, coordinates with rubber bushing；Anti-lost assembly lower end is connected with hollow rotor,
There are 2～3 rotor flow tracts hollow rotor lower end；Universal drive shaft assembly mainly include 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 and stator
Housing connects, and upper petal ball pivot is connected with hollow rotor；The upper and lower two ends of ball seat connecting rod respectively with upper petal ball pivot
Coordinating with lower petal ball pivot, stop collar is connected with ball seat connecting rod, petal ball pivot movement upwards in restriction；Hold
Pressure ball is arranged in the hole that ball seat connecting rod and upper petal ball pivot cooperatively form, and water cap is connected with lower petal ball pivot；
Driving-shaft assembly mainly include transmission shaft shell, power transmission shaft, upper seal assembly, intermediate seal assembly, under close
Envelope 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, passes
Moving axis and water cap connect；In the annular space that upper seal assembly is arranged on transmission shaft shell and power transmission shaft cooperatively forms；
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-
Fall assembly to be made up of anti-lost nut, anti-lost pull bar；Anti-lost pull bar upper end is connected with anti-lost nut, lower end with in
Idle running connects；The position that described upper petal ball pivot and lower petal ball pivot are connected with ball seat connecting rod is 4～6 flowers
Lobed spline；Power transmission shaft and water cap connect contact position and support location by disc spring；Described upper seal assembly includes passing
In moving axis, upper sealing control spring, sleeve, upper sealing group, static sealing ring, piston/cylinder, upper sealing group are moved
The outer static sealing ring of sealing ring, upper sealing group and bearing；Sleeve outer surface contacts with piston/cylinder, inner surface with
Power transmission shaft contacts, and in hub internal bore installation 2～4 groups, static sealing ring in sealing group, cooperatively forms quiet with power transmission shaft
Seal；Sealing group dynamic seal ring and bearing in piston/cylinder endoporus installation 2～3 groups, outer surface installs 2～4
The outer static sealing ring of sealing group in group；The upper control spring that seals is arranged on piston/cylinder upper end；Intermediate seal assembly
Including transmission shaft shell, power transmission shaft, intermediate seal group dynamic seal ring, intermediate seal group outer static sealing ring, lock
Static sealing ring and lower pipe nipple in tight set, intermediate seal group；Lower pipe nipple upper end endoporus installs 2 groups of intermediate seal groups
Dynamic seal ring, cooperatively forms movable sealing with lock sleeve；Lower pipe nipple outer surface is installed outside 1～3 group of intermediate seal group
Static sealing ring, cooperatively forms static seal with transmission shaft shell；Lock sleeve upper end endoporus installation 1～2 group is middle close
Static sealing ring in envelope group, cooperatively forms static seal with power transmission shaft；Lower seal assembly include power transmission shaft, lower pipe nipple,
Balance pressure runner, sealing check (non-return) valve, lower seal control spring, lower seal group dynamic seal ring and pipe close；Flat
Weighing apparatus pressure runner, inside lower short circuit, seals check (non-return) valve and lower seal controls spring and is sequentially arranged at balance pressure
In runner, balance pressure runner lower end port installs pipe close；Lower seal assembly endoporus installs 2～3 groups of lower seals
Group dynamic seal ring, cooperatively forms movable sealing with power transmission shaft；Described sleeve plates one layer with the contact surface of piston/cylinder
Chromium, its thickness is 0.05～0.20mm, to increase Corrosion Protection and the wearability of contact surface；So, single
By-pass valve assembly to bypass cooperates with one end of motor joint and to be connected, the lower end of the valve body of its by-passing valve
External screw thread screw with the internal thread of the upper end of motor joint and be connected；The other end of motor joint and motor assembly
Cooperate connection, the internal thread of one end of the external screw thread of the lower end of its motor joint and the housing of motor assembly
Screw connection；It is characterized in that: check valve cooperates with by-passing valve and is connected, and makes check valve be arranged on by-passing valve
Valve port in, the collar extension of its check valve directly interlinks with the collar extension of the valve port of by-passing valve, the internal orifice of check valve
Directly interlink with the internal orifice of the valve port of by-passing valve.
The helicoid hydraulic motor of a kind of unidirectional bypass the most according to claim 1, is characterized in that: check valve
Body outer tube wall be provided with connection external screw thread, the inwall of the valve port of by-passing valve is provided with connection internal thread, and it is single
Screw even with the connection internal thread on the inwall of the valve port of by-passing valve to the external screw thread that connects of the body outer tube wall of valve
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410729762.5A CN105888537A (en) | 2014-11-28 | 2014-11-28 | One-way bypass screw drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410729762.5A CN105888537A (en) | 2014-11-28 | 2014-11-28 | One-way bypass screw drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105888537A true CN105888537A (en) | 2016-08-24 |
Family
ID=56699278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410729762.5A Pending CN105888537A (en) | 2014-11-28 | 2014-11-28 | One-way bypass screw drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105888537A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905726A (en) * | 2017-11-09 | 2018-04-13 | 贵州高峰石油机械股份有限公司 | A kind of method and spiral drilling rig structure for improving helicoid hydraulic motor impact resistance |
| CN112267823A (en) * | 2020-11-24 | 2021-01-26 | 中国石油天然气集团有限公司 | Anti-tripping motor assembly of screw drill |
| CN116357221A (en) * | 2023-05-31 | 2023-06-30 | 德州联合石油科技股份有限公司 | Screw drilling tool |
-
2014
- 2014-11-28 CN CN201410729762.5A patent/CN105888537A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905726A (en) * | 2017-11-09 | 2018-04-13 | 贵州高峰石油机械股份有限公司 | A kind of method and spiral drilling rig structure for improving helicoid hydraulic motor impact resistance |
| CN112267823A (en) * | 2020-11-24 | 2021-01-26 | 中国石油天然气集团有限公司 | Anti-tripping motor assembly of screw drill |
| CN116357221A (en) * | 2023-05-31 | 2023-06-30 | 德州联合石油科技股份有限公司 | Screw drilling tool |
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Application publication date: 20160824 |