CN2259481Y - Controllable hydraulic pressure device - Google Patents
Controllable hydraulic pressure device Download PDFInfo
- Publication number
- CN2259481Y CN2259481Y CN 96216496 CN96216496U CN2259481Y CN 2259481 Y CN2259481 Y CN 2259481Y CN 96216496 CN96216496 CN 96216496 CN 96216496 U CN96216496 U CN 96216496U CN 2259481 Y CN2259481 Y CN 2259481Y
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- CN
- China
- Prior art keywords
- pressure
- drill
- pressure regulation
- piston
- pressure device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A controllable hydraulic pressure device is a drilling tool for oil field. The controllable hydraulic pressure device can be used in any drilling construction of requesting constant pressure and drill to prolong the service life of the drilling head. The manipulator can know the working stage of the pressure device under the well by using this pressure device on the ground, therefore, the drill pressure can be exerted controllably by the manipulator. The pressure device comprises a drill post, a joint, a regulating pressure rod, a cylinder, a regulating pressure air spout, a piston rod, a splined coupling, a drill head and a piston seal ring. The drill pressure of the pressure device can be changed in the mode of changing the regulating pressure air spout or the regulating pressure rod according to the different job requirements. The pressure device is especially suitable to the well drilling construction which requests the constant pressure of the drill and safe construction of the small well hole, the horizontal well and the sidetracked hole, etc.
Description
The utility model relates to the fluid power pressurizer that a kind of oil drilling uses, and the pressurizer that uses in particularly a kind of wellbore construction that requires constant pressurization to creep into belongs to the drilling tool class.
Usually institute adds the pressure of the drill size and operates brake lever by the driller and control in the wellbore construction.Because artificial factor, institute adds the pressure of the drill and is difficult to keep constant, thereby influences drilling life of bit.In the wellbore construction of power drilling tool was housed, the pressure of the drill of variation also influenced the life-span of power drilling tool.
Conventional fluid power pressurizer of the prior art is made up of drill string, joint, piston, cylinder barrel, piston rod, splined and drill bit as shown in Figure 1.Formed pressure fell when its operating principle was mainly leaned on drilling fluid by bit nozzle, produced thrust at piston upper surface.This thrust promptly is the pressure of the drill that is delivered on the drill bit.Impulse stroke is exactly the length that piston is axially migrated in cylinder barrel.The pressurizer of this structure only when piston does not contact joint, just plays the effect of constant pressurization, when piston contact joint, continues to transfer drill string, will form excessive pressure on drill bit, causes the drill bit premature failure.In addition, because this pressurizer ground does not have display unit, the driller is difficult to grasp the down-hole situation, whether the down-hole pressurizer adds presses ground to know.Thereby, no matter from operation, also being to use, conventional fluid power pressurizer all exists major defect.
The purpose of this utility model is to provide a kind of can monitor the down-hole situation on the ground, thereby controllably applies the controlled fluid power pressurizer of the pressure of the drill in wellbore construction.
Mainly both form controlled fluid power pressurizer of the present utility model by relative stationary part that links to each other with drill string and the relative motion part that can produce the pressure regulation effect.Stationary part mainly is made up of parts such as drill string, change snapping head, pressure regulation bar, cylinder barrel and guiding spline housings relatively.Drill string is the conventional drilling roofbolt.Become the snapping head is shaped on male thread and box thread respectively into two ends tubular element.The form of structure of pressure regulation bar is to have the disk in overcurrent duct and the assembly of elongate rod, and elongate rod can be finished the pressure adjustment with the associated components combination in the relative motion part.Its material is the high-carbon alloy steel of energy erosion-wear-resisting etc.Cylinder barrel is the cylinder of inner surface through fine finishining and specially treated.The guiding spline housing is shaped on high-intensity internal spline at inner surface, and the circumference that is mainly used in guiding and restriction pressure regulation motion parts rotates.Above-mentioned parts all interconnect with the form of screw thread and are integral.The relative motion part mainly is made up of parts such as pressure regulation nozzle, piston, piston rod and drill bits.The pressure regulation nozzle is the pressure regulation critical component, and with the material manufacturing of wear-resisting grain such as high-carbon alloy steel, carbide alloy or pottery erosive wear, the big I of nozzle diameter is adjusted according to the requirement of work, to obtain suitable work the pressure of the drill.Piston mainly designs for transmitting pressure, in cylinder barrel, slide up and down during work, its outer through on joint ring is housed, from anti-leak.Piston rod is a hollow stem, and is shaped on the external splines that matches with spline housing on the outer surface, and its endoporus provides passage for drilling fluid, and outer flower is built to the usefulness of axially-movable is provided.Drill bit be connected piston rod below, be conventional bit or the special drill of selecting for use according to the different operating situation.
The operating principle of controlled fluid power pressurizer is such, because nozzle is worked as drilling fluid in design through out-of-date, have certain pressure to fall, thereby the controlled fluid power pressurizer of going into the well with drill string is when the work beginning, shown pressure is the formed pressure of injection drop on the ground.But along with drill string continue transfer, the pressure regulation bar enters nozzle, produces throttling action, forms new pressure drop.Because in the impulse stroke of piston, the pressure regulation bar is in the nozzle all the time, this pressure drop also just remains constant, thereby has also just formed the constant the pressure of the drill in the drilling process.The pressure that this constant the pressure of the drill shows on the ground is obviously greater than the formed pressure of injection drop.The terrestrial operation personnel just can the base area surface pressure variation judge whether downhole drill bit is in constant pressurized state and is controlled.In nozzle, cover whole length when the pressure regulation bar, just finished an impulse stroke, transfer drill string then and begin next impulse stroke, go round and begin again, finish the work of creeping into.
The pressure of the drill that this fluid power pressurizer is applied can be according to different job requirements, and the mode by conversion pressure regulation nozzle or pressure regulation bar changes.In operating process, when entering stroke state or surpassing stroke state and do not enter stroke state, ground pump pressure display can both show with different pump pressures.
The utility model compared with prior art has can understand the advantage of down-hole pressurizer duty on ground, thereby brings convenience to the operator, really plays the effect of constant pressurization.Simultaneously, this pressurizer is simple in structure, and ground monitoring is easy.
The utility model is further described to accompanying drawing 2 given embodiment below in conjunction with accompanying drawing 1.
Accompanying drawing 1 is the structural representation of conventional fluid power pressurizer
Accompanying drawing 2 is structural representations of controlled fluid power pressurizer
Controlled fluid power pressurizer among the embodiment is made up of drill string (1), joint (2), pressure regulation bar (3), cylinder barrel (4), pressure regulation nozzle (5), piston (6), piston rod (7), splined (8), drill bit (9) and piston packing ring (10).Drill string (1) adopts screwed connection with joint (2), pressure regulation bar (3), cylinder barrel (4), becomes relative stationary part.Pressure regulation nozzle (5), piston (6), piston rod (7) and drill bit adopt screwed connection, become relative motion parts.The spline housing and the cylinder barrel of splined (8) are rigidly connected, and splined shaft and piston rod are rigidly connected, and make this two large divisions can only axially-movable, and can not radially rotatablely move.Pressure regulation bar (3), pressure regulation nozzle (5) and piston rod (7) all have through hole can allow drilling fluid pass through.With the drill string G.I.H, owing to conduct oneself with dignity, piston (6) falls to the bottom of cylinder barrel (4) to pressurizer before drill bit does not touch the shaft bottom before work.At this moment pressure regulation nozzle (5) leaves pressure regulation bar (3) and is in and treats duty.Earlier do not transfer drill string when starting working, start the ground slush pump and flow out by the through hole of drill string (1) through joint (2), pressure regulation bar (3), nozzle (5), piston rod (7) and drill bit (9) by mud.Because bit nozzle has fixation pressure to fall P
Z, at this moment the ground pump pressure is made as P
0P
0Be downhole drill bit and be in the stroke maximum rating, just do not have the pressure of the drill state.At this moment can transfer drill string by drill bit (9) contact shaft bottom, when continuing to transfer when pressure regulation bar (3) enters pressure regulation nozzle (5), because cross section of fluid channel reduces P is fallen in generation pressure
TAt this moment the ground pump pressure will be from P
0Rise to P
1P
1-P
0The pressure drop of=Δ P generally is controlled at about 1-2MPa, can clearly offer an explanation out to suitable with ground pump pressure display.Because the pressure regulation pole length is exactly the length of pressurizer stroke, so the terrestrial operation personnel see pump pressure P
0Rise to P
1The time, just represent that the down-hole pressurizer has entered impulse stroke.The length that continues to transfer to an impulse stroke then gets final product.At this moment adding the pressure of the drill on the drill bit is F=S (P
Z+ P
T).Along with the constant the pressure of the drill that carries out being added with all the time on the drill bit F that creeps into, until drill bit move down make pressure regulation nozzle (5) leave pressure regulation bar (3) till.The ground pump pressure is again from P after a stroke has bored
1Drop to P
0, therefore the duty in the face of the down-hole pressurizer is among the understanding all the time.At this moment the operating personnel's length that can transfer a stroke of drill string again continues to creep into.
Consider that the operator is long with the stroke of transferring drilling tool sometimes, can occur the excessive possibility of drill bit the pressure of the drill equally.It is bigger that pressure regulation bar (3) its structure in design process is often made root diameter (RD).When operating personnel transfer drill string when excessive, pressure regulation nozzle (5) will enter the root of pressure regulation bar (3), and at this moment because flow area is too small, the ground pump pressure will rise suddenly.Thereby remind operating personnel to hasten to take measures, on carry drill string and make pump pressure return to P
1Or P
0State.
This utility model is that also the pressurizer lower end also can connect power drilling tool.If the pressure of power drilling tool is reduced to P
0The pressure of the drill F=S (P then
Z+ P
T+ P
0).For as required, but select the diameter of suitable the pressure of the drill appropriate change pressure regulation nozzle to meet the demands.The diameter that also can change the pressure regulation bar changes the variation of the pressure of the drill.Mud flow rate is constant in this utility model requirement course of work, and is constant to guarantee the pressure of the drill.This pressurizer is for slim-hole, horizontal well, and the construction of drilling wells such as sidetracked hole is safer reliable.Therefore this pressurizer also is the utility of safety drilling
Claims (4)
1, the controlled fluid power pressurizer that uses in a kind of oil drilling comprises drill string, joint, piston, cylinder barrel, piston rod, splined and drill bit, it is characterized in that: the pressure regulation bar is housed on its joint, at piston crown the pressure regulation nozzle is housed.
2, controlled fluid power pressurizer according to claim 1, it is characterized in that: the pressure regulation bar is the assembly of disk and elongate rod, have the duct that drilling fluid is passed through smoothly on the disk, the root of elongate rod is made the back taper that diameter enlarges gradually, and also has the passage of drilling fluid on the centre of piston rod and the pressure regulation nozzle.
3, controlled fluid power pressurizer according to claim 1 and 2, it is characterized in that: the pressure regulation nozzle of controlled fluid power pressurizer and pressure regulation bar all adopt the high-carbon alloy steel of solid phase erosive wear in the ability mud, and materials such as carbide alloy or pottery are made.
4, controlled fluid power pressurizer according to claim 3, it is characterized in that: this pressurizer is made up of drill string, joint, pressure regulation bar, cylinder barrel, pressure regulation nozzle, piston, piston rod, splined, drill bit and piston packing ring etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216496 CN2259481Y (en) | 1996-08-02 | 1996-08-02 | Controllable hydraulic pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216496 CN2259481Y (en) | 1996-08-02 | 1996-08-02 | Controllable hydraulic pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2259481Y true CN2259481Y (en) | 1997-08-13 |
Family
ID=33897972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96216496 Expired - Fee Related CN2259481Y (en) | 1996-08-02 | 1996-08-02 | Controllable hydraulic pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2259481Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405321A (en) * | 2014-10-21 | 2015-03-11 | 中国石油天然气集团公司 | Drilling pressure pushing pressurizer |
| CN105298384A (en) * | 2015-09-24 | 2016-02-03 | 四川飞翔能源有限公司 | Continuous drilling machine |
-
1996
- 1996-08-02 CN CN 96216496 patent/CN2259481Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405321A (en) * | 2014-10-21 | 2015-03-11 | 中国石油天然气集团公司 | Drilling pressure pushing pressurizer |
| CN104405321B (en) * | 2014-10-21 | 2017-09-01 | 中国石油天然气集团公司 | The pressure of the drill is pushed away plus device |
| CN105298384A (en) * | 2015-09-24 | 2016-02-03 | 四川飞翔能源有限公司 | Continuous drilling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |