CN2188646Y

CN2188646Y - Side drilling tool

Info

Publication number: CN2188646Y
Application number: CN 94228092
Authority: CN
Inventors: 张岚
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-22
Filing date: 1994-03-22
Publication date: 1995-02-01
Anticipated expiration: 2004-03-22

Abstract

The utility model belongs to the workover tools. The utility model comprises an inclination guider with a cycle channel and an inclination sender with a cycle channel. The inclination guider with a cycle channel is composed of a top, an inclined plane, and a joint, etc.; the inclination sender with a cycle channel is composed of a top, an inclined plane, and a joint, etc. Using the utility model can simplify the process of a sidetrack fixing the inclination guider for oil and gas wells, water wells, and salt wells, etc. The utility model is simple in manufacture, low in cost, reliable in work, and easy in use. Because the mission success rate of the utility model is high, the utility model can save investments in installation and maintenance, and reduce storehouse reserve. Because the utility model is serial products, the utility model is suitable for various well sidetracks.

Description

Side drilling tool

The utility model belongs to workover tool.

For because of payzone position sleeve pipe badly damaged, payzone cave in that sand buries or well in the oil well that can't produce again that causes such as junk, gas well, well, salt well or cause well that lower part borehole scraps etc. because of drilling failure, comparatively Jing Ji reparation or to utilize method be to carry out window sidetracking in well, promptly the appropriate location is lowered to the wedge deflection tool (wedge deflection tool is with sending oblique device and drilling tool G.I.H) on a steel body inclined-plane in former well, fix with cement or slips, with milling into instrument (milling awl) by the supporting guiding function of wedge deflection tool, leave the window of certain-length, directed then sidetracking branch inclined shaft, form new well in the bottom, so both can utilize the old well in top (sleeve pipe), reduce the expense of drilling well again, can recover its production capacity again or continue drilling well etc.

The wedge deflection tool of existing sidetracking instrument is made up of top 1, inclined-plane 2 and joint 3 etc., as shown in Figure 1.The oblique device that send of existing sidetracking instrument is made up of as shown in Figure 2 joint 4, inclined-plane 5 and top 6 etc.Because of there not being circulation canal, must be earlier during use with under the drilling tool in the well top, artificial bottom of a well, the cement paste of fixing wedge deflection tool being used by drilling tool is injected into top, artificial bottom of a well in the well, at one section cement paste post of top, artificial bottom of a well formation, then drilling tool is risen out; By bolt 8 and nut 10 wedge deflection tool 9 with send oblique device 7 to assemble, as shown in Figure 3.Be sent in the well in the cement paste post with drilling tool, cut off bolt 8, wedge deflection tool 9 is stayed in the well, sending oblique device 7 and drilling tool to play out time with fixed attention by drilling tool pressure.As seen, not only labor strength is big, and the activity duration is long, and the sidetracking cost increases.And above-mentioned work must be finished in the past in the cement initial set, otherwise can cause under the wedge deflection tool not in placely, even wedge deflection tool is fixing not firm etc., makes the sidetracking failure of windowing, and cost is significantly improved.

Existing another kind of sidetracking instrument, its wedge deflection tool are that a cover suspension type slip system or an adding pressure type slip system is installed on wedge deflection tool joint 3 as shown in Figure 1, utilize slips to be close to casing wall, in order to reach the fixedly purpose of wedge deflection tool.Its advantage is to have saved the cementing operation.But because of its complex structure, troublesome poeration, cost are very high, and fixing wedge deflection tool weak effect, when fenestration procedure is unstable, can produce and rock, cause the failure of windowing, thereby use seldom.

The purpose of this utility model be for provide a kind of simple for production, cost is low, both can be simplified to fix the technology of wedge deflection tool, can reduce significantly labor strength and labour hour again, and the sidetracking instrument of reliable operation: it comprises wedge deflection tool and send oblique device.

The wedge deflection tool that sidetracking instrument described in the utility model comprises is achieved in that with accompanying drawing 4 and is illustrated: it has circulation canal 3, by top 1, and inclined-plane 2, joint 4 compositions such as grade; It is characterized in that having the circulation canal 3 that can satisfy operation needs such as cement injection.The shape on its inclined-plane 2 can be divided into two kinds on cambered surface and plane; The gradient on its inclined-plane 2 is generally 2 °～4 °, and shaft bottom horizontal movement is as requested selected, and requires the shaft bottom horizontal movement big, selects big person, otherwise opposite; Its length is 1～5m; The thickness at top 1 is generally about 20mm; Joint 4 can be directly and tail pipe link.Said wedge deflection tool can be by cast iron, and cast steel or alloy steel are made.

Sidetracking instrument described in the utility model comprises, and to send oblique device to be achieved in that with accompanying drawing 5 be that example is illustrated: it has circulation canal 7, by joint 5, and inclined-plane 6, top 8 compositions such as grade; It is characterized in that having the circulation canal 7 that can satisfy operation needs such as cementing; The wedge deflection tool inclined-plane 2 that the shape on its inclined-plane 6, gradient, length and sidetracking instrument described in the utility model comprise coincide; Joint 5 can be directly and drilling tool link.Top 8 thickness are generally 20mm.Saidly send oblique device to make by cast iron, cast steel, alloy steel etc.

Implementing the utility model is illustrated with accompanying drawing 6: with wedge deflection tool 11 with send oblique device 12 usefulness bolts 10 and nut 9 is fixed together both.Circulation canal 3 communicates with circulation canal 7.Leak for preventing on the inclined-plane 2 of wedge deflection tool 11 and sending between the inclined-plane 6 of oblique device 12, between adds a sealing device 13, and sealing device 13 can be made with rubber pad or other encapsulant; The plastic pipe that is complementary with circulation canal 3,7 that also can insert circulation canal 3,7 respectively with one section two ends is made.After the assembling wedge deflection tool joint 4 and tail pipe are linked, to send oblique device joint 5 to link with drilling tool, be sent to the artificial bottom of a well with drilling tool, in well, inject the cement paste that fixing wedge deflection tool is used then, behind the cemented up slurry, transfer drilling tool, bolt 10 is cut off by drilling tool weight, wedge deflection tool 11 is stayed in the well, tripped out and send oblique device 12 and drilling tool.Thereby saved first cement injection needed down, play the drilling tool operation, shortened the fixedly wedge deflection tool time, both reduced labor strength and labour hour, improved the precision of fixing wedge deflection tool and the sidetracking success rate of windowing again.

The utility model is series of products, selects the sidetracking instrument of various outer diameter for different well internal diameters.For φ 177.8mm sleeve pipe (internal diameter is Φ 161mm), adopting maximum outside diameter is the wedge deflection tool of Φ 154mm and the sidetracking instrument that send oblique device composition that matches with it, for Φ 140mm sleeve pipe (internal diameter is Φ 126mm), adopting maximum outside diameter is the wedge deflection tool of Φ 118mm and the sidetracking instrument that send oblique device composition that matches with it.

The utility model can be made with casting method; Also hollow or solid round steel such as the drill collar that gives up can be sawn into bench saw.Preferably prolong its axis for solid round steel and get out circulation canal 3 or circulation canal 7 with vertical drill.

The utility model is simple in structure, simple for production, cost is low, reliable operation, easy to use, because of adopting this utility model sidetracking one-time success rate height of windowing, so can reduce wedge deflection tool and send oblique device consumption, thereby can save the installation and maintenance investment, reduce storehouse wedge deflection tool and the storage level of sending oblique device.The well window sidetracking that the utility model can be used for oil well, gas well, well, salt well or scraps because of the accident lower part borehole.

Claims

1, a kind of sidetracking instrument comprises by top 1, inclined-plane 2, and the wedge deflection tool that joint 4 is formed and by top 8, inclined-plane 6, joint 5 is formed send oblique device, it is characterized in that having on the wedge deflection tool circulation canal 3 and send and have circulation canal 7 on the oblique device;

2, sidetracking instrument according to claim 1 is characterized in that wedge deflection tool 11 and send between the oblique device 12 that sealing device 13 is arranged.