CN202249737U

CN202249737U - Rotary core drill

Info

Publication number: CN202249737U
Application number: CN201120352378XU
Authority: CN
Inventors: 杨凤申; 胡博; 刘坤; 梁廷风
Original assignee: China National Petroleum Corp; BGP Inc
Current assignee: China National Petroleum Corp; BGP Inc
Priority date: 2011-09-20
Filing date: 2011-09-20
Publication date: 2012-05-30
Anticipated expiration: 2021-09-20

Abstract

The utility model discloses a rotary core drill, which is applied to seismic exploration drilling of petroleum seismic exploration and coal seismic exploration in areas of loess tableland, weathered rock mountain land and the like. The upper end of a connector is provided with internal thread; the lower end of a drill stem is in threaded connection with the connector; the lower end face of the connector is provided with a fixing lug which protrudes downwards; the fixing lug is provided with a transverse hole; the lower end of the connector is hinged with a coring pipe through a pin shaft; the lower end of the coring pipe is connected with a reamer; the lower end of the reamer is connected with a rock core drill bit; a clamping spring is fixed in the reamer. The rotary core drill has the effects that: full crushing of a seismic exploration drilling method is changed into annular crushing, so that the consumption of power required by crushing rock is reduced and the energy consumption is reduced; the weight of the entire set of drilling equipment can be reduced, the removal load of drilling personnel is reduced, and the safety risk of removal is reduced; and the situation of blowing drill cuttings at a full crushing drilling site is reduced, the pollution to the drilling personnel and equipment is reduced, and the human health is facilitated.

Description

The rotary coring drilling tool

Technical field

The utility model relates to oil seismic exploration, coal seismic prospecting etc. needs to bore man-made explosion hole technical field.Specifically, be mainly used in the rotary coring drilling tool of regional seismic prospecting drilling wells such as loess tableland, decomposed rock mountain region.

Background technology

At present, the assurance of loess tableland and mountain region seismic prospecting drilling well depth of pore forming is the key link that improves the seismic acquisition imaging precision.Such area feature is: the high slope of drought and water shortage, mountain is steep, and coombe spreads all over, and motor-driven drilling equipment can't be gone up a hill.Therefore such regional exploration drilling is comparatively difficult.

At first, because lack of water can't adopt the less relatively DWM technology of power requirement; Secondly, the comprehensive broken drilling well power of air circulation is had relatively high expectations, and fuel consume is big, and dust pollution is serious, and resettlement difficulty and security risk are bigger; Therefore artificial luoyang spade is adopted in the construction of seismic prospecting at present of such area more; Guarantee construction speed with tactics of human sea; But this instrument runs into then constructional difficulties of slip stone or old stratum, and the wellbore construction degree of depth can't guarantee, so the seismic acquisition imaging precision is affected.

The utility model content

The purpose of utility model is: a kind of rotary coring drilling tool is provided; Fragmentation becomes ring crush comprehensively, reduce catalase institute energy requirement, thereby the power motor that air-circulating drilling is equipped with reduces in the 20kW from 60kW; Rig weight alleviates greatly, reduces mountain region resettlement difficulty and security risk.

The technical scheme that utility model adopts is: the rotary coring drilling tool comprises drilling rod, connector, bearing pin, corer, reamer, jump ring, core drill bit; It is characterized in that: there is internal thread the upper end of connector, and the drilling rod lower end is threaded with connector; The fixedly ear of the oriented lower convexity in connector lower surface, fixedly ear has transverse holes, and connector lower end and corer are articulated and connected through bearing pin; The lower end of corer is connected with reamer, and the reamer lower end is connected with core drill bit, in reamer, is fixed with jump ring.

Can when pulling out of hole, take well head out of for last landwaste, there is screw thread the outer wall upper end of described connector, is connected with the accumulated powder pipe in the upper end of connector, and the accumulated powder pipe box forms annular space in the outside of drilling rod between drilling-rod external wall and accumulated powder inside pipe wall.Be evenly distributed with from inside to outside steam vent obliquely on the connector; Steam vent is communicated with the drilling rod centre bore.

The use of summary rotary coring drilling tool.Consult Fig. 2.

When 1. beginning drilling well, at first connector 3 is linked to each other with unit head, connector 3 lower ends link to each other with corer (5), and corer 5 lower ends link to each other with reamer 6, and jump ring 7 is put in inside, and reamer 6 lower ends are connected with core drill bit 8;

2. start the rig rotation, the pressurization drilling well is bored full core up to corer 5;

3. stop the drilling tool rotation, corer 5 is proposed well head;

4. spade is covered on well head, rotary coring pipe 90 degree make corer 5 side window mouth downs, remove core;

5. go back to upright position, corer 5 road, put into well head, connector 3 is blocked at well head with fork, the Reverse Power head is dismantled connector 3 and unit head connecting thread;

6. promote unit head, drilling rod 1 upper end is linked to each other with unit head, accumulated powder pipe 2 is inserted drilling rod, drilling rod 1 and accumulated powder pipe 2 lower ends link to each other with connector 3 respectively;

7. take off fork and begin drilling well, start air compressor machine, compressed air is from upwards aperture discharge of connector 3; Connector forms negative pressure below 3; Drilling cuttings moves upward, and is deposited in the accumulated powder pipe 2, and corer 5 stops the rotation after boring and expiring; Promote drilling tool up to the flat well head that exposes of connector 3 lower end forks, block with fork;

8. unload the accumulated powder pipe 2 and the first bar drill bar, unit head is linked to each other with drilling rod 1, remove the core order with last same;

9. the lower end with the first bar drill bar 1 and accumulated powder pipe 2 is connected with connector 3, transfers in the wellhole, and it is flat to block first drilling rod upper end with fork, connects second drilling rod, carries out drilling well for the third time, and other orders are same with first drilling rod.

The beneficial effect of utility model: utility model rotary coring drilling tool is primarily aimed at a kind of energy-saving drilling tool than the soft formation design such as plasticity soil layer, hardpan, mud stone and weathered sandstone.Main effect has three aspects: the one, and the seismic prospecting boring method is become ring crush from comprehensive fragmentation reduced the consumption of fractured rock required drive, reduced energy consumption; The 2nd, because the reduction of energy consumption reduces a whole set of drilling equipment weight, reduced drilling implementer's resettlement burden, reduced the security risk of resettlement; The 3rd, this cover drilling tool and boring method have significantly reduced the scene that comprehensive broken well site drilling cuttings stirs up a cloud of dust, and have alleviated the pollution to drilling implementer and equipment, help the raising of health and service life of equipment.

Description of drawings

Fig. 1 is the structural profile sketch map of utility model rotary coring drilling tool embodiment 1.

Fig. 2 is the structural profile sketch map of utility model rotary coring drilling tool embodiment 2.

Among the figure, 1-drilling rod, 2-accumulated powder pipe, 3-connector, 4-bearing pin, 5-corer, 6-reamer, 7-jump ring, 8-core drill bit.

The specific embodiment

Embodiment 1: with a rotary coring drilling tool and boring method is example, and utility model is done further explain.

Consult Fig. 1.The rotary coring drilling tool comprises drilling rod 1, connector 3, bearing pin 4, corer 5, reamer 6, jump ring 7, core drill bit 8.

There is internal thread the upper end of connector 3, and drilling rod 1 lower end is threaded with connector 3.Connector 3 lower surfaces have one to the fixing ear of the rectangle of lower convexity, and a transverse holes is fixedly arranged on the ear; There are two parallel fixedly ears that make progress the upper surface of corer 5, and on two parallel fixedly ears that make progress a transverse holes is arranged.The fixedly ear of connector 3 lower ends insert two parallel fixedly between the ear, a bearing pin 4 passes transverse holes.Connector 3 lower ends and corer 5 are articulated and connected through bearing pin 4; The lower end of corer 5 is connected with reamer 6, and reamer 6 lower ends are connected with core drill bit 8, are fixed with jump ring 7 in the reamer 6.

Embodiment 2: embodiment 2 with embodiment 1 difference is: there is external screw thread the outer wall upper end of connector 3, and screw thread is connected with accumulated powder pipe 2 in the upper end of connector 3, and accumulated powder pipe 2 is enclosed within the outside of drilling rod 1, between drilling rod 1 outer wall and accumulated powder pipe 2 inwalls, forms annular space.Be evenly distributed with from inside to outside six steam vents obliquely on the connector 3, the outer angle obliquely of six steam vents is 45 degree; The inner of steam vent is communicated with drilling rod 1 centre bore.

According to air compressor machine tolerance size a plurality of steam vents being arranged among the embodiment 2 is obliquely (becoming 30-60 degree angle with axis), helps forming negative pressure in the drill bit bottom, makes and returns on the drilling cuttings; Connector 3 and the accumulated powder pipe 2 employing steep-pitch thread that is connected is convenient to dismounting.

Connector 3 is connected with corer 5 linkworks, and main purpose is corer 5 to be turned over along the drilling tool center line turn 90 degrees, and is convenient to clear up landwaste.Have side window on corer 5 body portion, the big I of side window radial direction is slightly bigger than core diameter, and the big I of side window length direction is definite according to landwaste moulding degree, can open forr a short time when landwaste is loose, and side window also can be opened a plurality of fenestellas when loose especially.Reamer 6 is according to strata condition build-up wear-resistant powder, and the postwelding diameter is not greater than the drill bit maximum gauge.Core drill bit 8 adopts alloy bit, compact bit or diamond bit according to strata condition, notices that mainly internal diameter will have tapering to cooperate with jump ring.The main effect of jump ring 7 is to cut off core, and stops and carry that core falls when boring, and scall adopts the hand basket structure.Accumulated powder pipe 2 length determine that according to a backhaul ring crush amount the less length of trying one's best adopts light-wall pipe as far as possible.

Claims

1. a rotary coring drilling tool comprises drilling rod (1), connector (3), bearing pin (4), corer (5), reamer (6), jump ring (7), core drill bit (8); It is characterized in that: there is internal thread the upper end of connector (3), and drilling rod (1) lower end is threaded with connector (3); The fixedly ear of the oriented lower convexity in connector (3) lower surface, fixedly ear has transverse holes, and connector (3) lower end and corer (5) are articulated and connected through bearing pin (4); The lower end of corer (5) is connected with reamer (6), and reamer (6) lower end is connected with core drill bit (8), in reamer (6), is fixed with jump ring (7).

2. rotary coring drilling tool according to claim 1; It is characterized in that: there is screw thread the outer wall upper end of connector (3); Be connected with accumulated powder pipe (2) in the upper end of connector (3), accumulated powder pipe (2) is enclosed within the outside of drilling rod (1), between drilling rod (1) outer wall and accumulated powder pipe (2) inwall, forms annular space; Be evenly distributed with from inside to outside steam vent obliquely on the connector (3); Steam vent is communicated with drilling rod (1) centre bore.