CN2115400U

CN2115400U - Horizontal well coring tool

Info

Publication number: CN2115400U
Application number: CN 91227994
Authority: CN
Inventors: 许俊良; 杨玉坤; 李开荣; 毕永进
Original assignee: DRILLING TECHNOLOGY INST SHENG
Current assignee: DRILLING TECHNOLOGY INST SHENG
Priority date: 1991-11-04
Filing date: 1991-11-04
Publication date: 1992-09-09

Abstract

In the construction of the petroleum drilling well, the present existing coring tool is difficult to meet the requirement of coring for a horizontal well. The utility model discloses a three point bearing supported combined horizontal well coring tool, adopting a fluid power flexible machine to lift an inner cylinder with a positioning joint hanging on a step and a locking pin to combine to limit the position. The combined horizontal well coring tool can ensure the inner cylinder to be centered in any operation condition. When core is cut, a sealing ball needs to be thrown and a drill tool is lifted so as to cut the core. At the time, the hidden core catcher automatically springs out to seal the lower part of the shrinking diameter, so as to ensure the loose crushing core not to fall in the process of pulling out a drill. The utility model can be used for the coring of a loose ground, also for the hard ground, as well as for various grounds.

Description

Horizontal well coring tool

The utility model belongs to the improvement of drilling and coring delivery instrument.

In the exploration and development of oil and natural gas, the most frequently used method of record is to carry out drilling and coring delivery in order to obtain accurately.That uses at present mainly contains two types coring tool: a kind of is pitching machinery adding pressure type; A kind of is to pull out formula in the friction.The former is applied to broken ground and cores, and hard and hard formation was cored during the latter was applied to.In horizontal well was cored, because tool axis is vertical with gravity direction, pitching adding pressure type coring tool had been difficult to application, pull out in the present friction formula instrument only be adapted to again in a hard hard formation, thereby the broken ground of horizontal well is cored and is not still had suitable coring tool.

The purpose of this utility model designs for the needs that satisfy the various stratum of horizontal well and core.

The utility model is that step hangs landing nipple and the lock pin combination is spacing by the flexible mechanical lifting mechanism of fluid power, three spot bearings supporting inner core.The flexible hoisting mechanism of fluid power is made up of ball sealer ［ 4 ］, telescopic shaft ［ 7 ］, pre-compressed spring ［ 6 ］, lock pin 1 ［ 5 ］ and lock pin 2 ［ 9 ］, telescopic shaft ［ 7 ］ top and middle part have two road cannelures and bottom pre-compressed spring ［ 6 ］ supporting, lock pin 1 ［ 5 ］, lock pin 2 ［ 9 ］ with spring is housed on every side.Step hangs landing nipple and the lock pin combination is spacing, step joint ［ 8 ］ top is overlapped ［ 2 ］ by a threaded pipe nipple with six sides and is connected, the bottom is connecting urceolus ［ 15 ］, inner chamber has a step, landing nipple ［ 10 ］ hangs on the step, the bottom is connecting inner core ［ 16 ］ and is hanging assembly ［ 11 ］, and two locating holes are arranged at landing nipple ［ 10 ］ top, and lock pin 2 ［ 9 ］ is housed in the hole.Single-row tapered roller bearing ［ 12 ］ supporting is adopted at three-point support inner core top, and roller alignment bearing pipe nipple ［ 14 ］ supporting is adopted at the middle part, and roller alignment bearing ［ 20 ］ supporting is adopted in the bottom.

Description of drawings:

Fig. 1 horizontal well coring tool structural representation

1 top connection, 2 six sides overlap 3 six square bars

4 ball sealers, 5 lock pins, 16 pre-compressed springs

7 telescopic shafts, 8 step joints, 9 lock pins 2

10 landing nipples 11 hang assembly

12 single-row tapered roller bearings, 13 plug-hole nylon balls

14 roller alignment bearing pipe nipples, 15 urceolus, 16 inner cores

17 centralizers, 18 undergauge covers

19 whole rock cores are grabbed 20 roller alignment bearings

21 concealed type rock cores are grabbed 22 core bits

Now the utility model will be further described in conjunction with Figure of description:

Under bore and the process of drilling in, inner core ［ 16 ］ and hang total journey ［ 11 ］ and be suspended on the step of step joint ［ 8 ］ by landing nipple ［ 10 ］, and by landing nipple ［ 10 ］ and lock pin 2 ［ 9 ］ integrated positioning, to prevent causing the concealed type rock core to grab ［ 21 ］ inefficacy owing to scurrying on the inner core ［ 16 ］.Inner core ［ 16 ］ top is by single-row tapered roller bearing ［ 12 ］, the middle part by roller alignment bearing pipe nipple ［ 14 ］ and bottom by roller alignment bearing ［ 20 ］ three-point support, to guarantee that it does not rotate with urceolus ［ 15 ］ between two parties, the concealed type rock core is grabbed ［ 21 ］ hidden outside in undergauge cover ［ 18 ］ before cutting the heart, destroy to guarantee rock core not to be produced, when cutting the heart, the ball sealer ［ 4 ］ that drops into promotes following on telescopic shaft ［ 7 ］ and promote it and move down at drilling fluid, lock pin 1 ［ 5 ］, lock pin 2 ［ 9 ］ stretches in the cannelure of telescopic shaft ［ 7 ］ under the spring force effect, when drilling tool is up, tangle the purpose of the together up realization mechanical lifting of inner core ［ 16 ］ inner core, whole rock core was grabbed ［ 19 ］ and is caught and pull off rock core when inner core rose, because inner core ［ 16 ］ is the displacement of urceolus ［ 15 ］ relatively, the concealed type rock core is grabbed ［ 21 ］ ejection and is sealed the lower end of undergauge cover ［ 18 ］, thereby guarantees that the loose crushing rock core does not drop in trip-out process.

The utility model is compared with original instrument, and the scope of application is big, and inner core is set upright, and the broken ground that both can be used for horizontal well is cored, also can be used for horizontal well in a hard hard formation core, core in the various stratum that also can be used for straight well.

Claims

1, a kind of horizontal well coring tool by inner core, urceolus, six sides cover, six square bars, centralizer, rock core grab, core drill is first-class forms, it is characterized in that adopting the fluid power mechanical lifting mechanism of stretching, shoulder hangs landing nipple and the lock pin combination is spacing, three spot bearings supporting inner core.

2, coring tool according to claim 1, it is characterized in that the flexible mechanical lifting mechanism of fluid power is by ball sealer (4), telescopic shaft (7), pre-compressed spring (6), lock pin 1(5) and lock pin 2(9) forms, telescopic shaft (7) top and middle part have two road cannelures and by pre-compressed spring (6) supporting, lock pin 1(5), lock pin 2(9) bottom with spring is housed on every side.

3, coring tool according to claim 1, it is characterized in that shoulder hangs landing nipple and the lock pin combination is spacing, to be shoulder joint (8) top overlap (2) by threaded pipe nipple with six sides connects, the bottom is connecting urceolus (15), inner chamber has a shoulder, and landing nipple (10) hangs on the shoulder, and the bottom is connecting inner core (16) and hanging assembly (11), two locating holes are arranged at landing nipple (10) top, and lock pin 2(9 is housed in the hole).

4, coring tool according to claim 1 is characterized in that the three-point support inner core, is that single-row tapered roller bearing (12) supporting is adopted at the top, and roller alignment bearing pipe nipple (14) supporting is adopted at the middle part, and roller alignment bearing (20) supporting is adopted in the bottom.