CN201074481Y - Seat sleeve special for sleeve welldrilling - Google Patents
Seat sleeve special for sleeve welldrilling Download PDFInfo
- Publication number
- CN201074481Y CN201074481Y CNU200720172900XU CN200720172900U CN201074481Y CN 201074481 Y CN201074481 Y CN 201074481Y CN U200720172900X U CNU200720172900X U CN U200720172900XU CN 200720172900 U CN200720172900 U CN 200720172900U CN 201074481 Y CN201074481 Y CN 201074481Y
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- China
- Prior art keywords
- casing
- sleeve pipe
- drilling
- shoulder
- sleeve
- Prior art date
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- Expired - Lifetime
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Abstract
Disclosed is a bottom-supported sleeve tube which is specially used for casing well drilling, and the utility model is applied to the process of casing well drilling. The utility model comprises a sleeve tube and a sleeve shoe. A PDC cutting element or a carbide alloy element is soldered on the sleeve shoe, which is characterized in that an axial locking shoulder, a locating shoulder and a locking groove of moment of torque are orderly arranged on the inner wall of the sleeve tube from top to bottom. The effect of the utility model is that the bottom-supported sleeve which is specially used for casing well drilling is matched with the locking tools down passed by armored rope, and then, lock and unlock between drill bit and casing string can be realized, thereby realizing recovering of bottoms drilling tools in casing well drilling. And then, the life time of the drilling tools in casing well drilling can be elongated, and the breakage of the drilling tools which wastes time can be avoided in the process of casing well drilling. The bottom-supported sleeve which is specially used for casing well drilling is simple in structure, firm in locking and reliable in unlocking.
Description
Technical field:
The utility model relates to a kind of drilling tool, the downhole tool that uses when particularly adopting casing drilling, sleeve pipe at the bottom of especially a kind of seat of casing drilling special use.
Background technology:
Casing Drilling Technique is according to using the processing mode of drilling tool to classify to it, can be divided into two classes: a class is to be the bottom drill tool recoverable casing drilling of representative with TESCO company, but a class is to be the bottom drill tool grinding formula casing drilling of representative with Weatherford company.
But the drilling tool that the casing drilling of bottom drill tool grinding formula uses can not reclaim, but has drillability.After getting into the design well depth, adopt the heart portion grinding of method for grinding with drilling tool.The problem that this casing drilling method exists is: in case drilling tool goes wrong in the time of can not continuing to creep in the process of drilling well, must propose the interior all drill strings of well and change drilling tool, delay the cover drilling time, influence drilling progress, increase drilling cost.Chinese patent notification number CN2711372Y provides a kind of casing drilling with fixed brill footwear.Adopt the bottom drill tool recoverable to carry out casing drilling,, can change drilling tool at any time, can reduce the casing drilling cost like this when drilling tool goes wrong can not continue to creep into the time.
At present, domesticly in bottom drill tool recoverable casing drilling instrument development, be in blank, do not see the correlation technique report.
Summary of the invention:
The utility model purpose is: provide a kind of casing drilling the special-purpose end sleeve pipe of sitting, can finish the callable casing drilling of bottom drill tool, and can realize that the bottom drill tool in the casing drilling process reclaims; Guarantee drilling tool and the accurate the locking and unlocking of sleeve pipe; Simple in structure.
The purpose of this utility model is achieved in that the special-purpose end sleeve pipe of sitting of casing drilling is made up of sleeve pipe and casing shoe.Be welded with PDC cutting element or cemented carbide components on the casing shoe.It is characterized in that internal surface of sleeve pipe has axial locking shoulder, locating shoulder and torque lock groove from top to bottom successively.
The bottom of the position of described axial locking shoulder connecting thread in sleeve pipe, the shape of locking shoulder is a taper surface.
Described locating shoulder is the plane shoulder.The distance of locating shoulder and locking shoulder bottom is between the 400-550 millimeter.
The distance of locating shoulder is arrived between the 150-200 millimeter in described torque lock groove top.The quantity of torque lock groove is evenly distributed on the inwall of sleeve pipe between 4-6.The shape of torque lock groove cross section is the groove of rectangular spline, and length is between the 200-250 millimeter, and is wide at the 35-60 millimeter, dark 10-15 millimeter.
The beneficial effects of the utility model are: the special-purpose end sleeve pipe of sitting of casing drilling cooperates with the down-hole locking tool string that wire rope is transferred, and can realize carrying out the locking and unlocking between drill bit and casing string, thereby realize that bottom drill tool reclaims in the casing drilling.Like this, prolong the application life of drilling tool in the casing drilling effectively, avoid in the well casing drilling process drilling tool to break down and cause waste of time.The special-purpose seat of this casing drilling end sleeve structure is simple, and locking is firm, and release is reliable.
Description of drawings:
Fig. 1 is the special-purpose structural profile schematic diagram of sitting end sleeve pipe of the utility model casing drilling.
Fig. 2 is the A-A sectional drawing.Fig. 2 represents the cross sectional shape of torque lock groove and the distribution situation of sitting end internal surface of sleeve pipe in the casing drilling special use.
Among the figure, 1. sleeve pipe 2. locks shoulder, 3. locating shoulder, 4. torque lock groove, 5. casing shoe.
The invention will be further described below in conjunction with accompanying drawing.
The specific embodiment
Embodiment 1: consult Fig. 1.
The special-purpose end sleeve pipe of sitting of casing drilling is made up of sleeve pipe 1 and casing shoe 5.11 meters of the length of sleeve pipe 1,12 millimeters of wall thickness.On casing shoe 5 bottoms and outer wall, be welded with the PDC cutting element.PDC cutting element market oil is sold.Adopt method of brazing that the PDC cutting element is welded on the casing shoe 5.Axial locking shoulder 2, locating shoulder 3 and torque lock groove 4 are arranged on sleeve pipe 1 inwall.
Axially lock the bottom of position connecting thread in sleeve pipe of shoulder 2, the shape of locking shoulder 2 is tapered slope.
Locating shoulder 3 is plane shoulders.Locating shoulder 3 is 450 millimeters with the distance of locking shoulder 2 bottoms.
The special-purpose use of sitting end sleeve pipe of summary casing drilling helps understanding the utility model.When carrying out casing drilling, drill bit is connected the lower end of down-hole locking tool string, and axial locking and torque lock device are arranged on the locking tool string of down-hole.When wire rope is transferred to the position of the special-purpose seat of casing drilling end sleeve pipe with down-hole locking tool string in casing string, positioner on the locking tool string of down-hole is ejected in the annular space of sitting on the end sleeve pipe locating shoulder 3, and because the effect of locating shoulder 3 makes down-hole locking tool string stop descending.At this moment, the axial locking of down-hole locking tool string and torque lock device are used with axial locking shoulder 2 and the torque lock groove 4 of sitting end sleeve pipe respectively, thereby carry out the task of the locking and unlocking between drill bit and casing string.
When needs more during bit change, with wire rope fishing tool is lowered into the down-hole, be connected with down-hole locking tool string, carry wire rope then, the axial locking of down-hole locking tool string and torque lock device respectively with the axial locking shoulder 2 and 4 releases of torque lock groove of sitting end sleeve pipe, carry wire rope in the continuation, trip out down-hole locking tool string and drill bit.When changing the finishing drilling head, in the time of need going into well again, repeat above process.
Claims (4)
1. the special-purpose end sleeve pipe of sitting of casing drilling is made up of sleeve pipe (1) and casing shoe (5), casing shoe is welded with PDC cutting element or cemented carbide components on (5), it is characterized in that: sleeve pipe (1) inwall has axial locking shoulder (2), locating shoulder (3) and torque lock groove (4) from top to bottom successively.
2. the special-purpose end sleeve pipe of sitting of casing drilling according to claim 1, it is characterized in that: the bottom of position connecting thread in sleeve pipe of described axial locking shoulder (2), the shape of locking shoulder (2) is a taper surface.
3. the special-purpose end sleeve pipe of sitting of casing drilling according to claim 1, it is characterized in that: described locating shoulder (3) is the plane shoulder, the distance of locating shoulder (3) and locking shoulder (2) bottom is between the 400-550 millimeter.
4. according to claim 1 or the special-purpose end sleeve pipe of sitting of 2 or 3 described casing drillings, it is characterized in that: the distance of locating shoulder (3) is arrived between the 150-200 millimeter in described torque lock groove (4) top, the quantity of torque lock groove (4) is between 4-6, be evenly distributed on the inwall of sleeve pipe (1), the shape of torque lock groove (4) is the groove of rectangular spline, length is between the 200-250 millimeter, and is wide at the 35-60 millimeter, dark 10-15 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720172900XU CN201074481Y (en) | 2007-08-31 | 2007-08-31 | Seat sleeve special for sleeve welldrilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720172900XU CN201074481Y (en) | 2007-08-31 | 2007-08-31 | Seat sleeve special for sleeve welldrilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201074481Y true CN201074481Y (en) | 2008-06-18 |
Family
ID=39519744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720172900XU Expired - Lifetime CN201074481Y (en) | 2007-08-31 | 2007-08-31 | Seat sleeve special for sleeve welldrilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201074481Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252049A (en) * | 2021-10-30 | 2022-03-29 | 浙江大学 | Seabed shallow layer topography deformation monitoring devices based on ROV |
-
2007
- 2007-08-31 CN CNU200720172900XU patent/CN201074481Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252049A (en) * | 2021-10-30 | 2022-03-29 | 浙江大学 | Seabed shallow layer topography deformation monitoring devices based on ROV |
| CN114252049B (en) * | 2021-10-30 | 2022-11-18 | 浙江大学 | Seabed shallow layer topography deformation monitoring devices based on ROV |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080618 |
|
| CX01 | Expiry of patent term |