WO2017029680A1

WO2017029680A1 - A drilling assembly for drilling wells and a method of drilling thereof

Info

Publication number: WO2017029680A1
Application number: PCT/IN2016/000193
Authority: WO
Inventors: Jaikumar Haridas BHOYATE
Original assignee: Bhoyate Jaikumar Haridas
Priority date: 2015-08-20
Filing date: 2016-07-21
Publication date: 2017-02-23

Abstract

A drilling assembly for drilling wells, having a drilling pipe for drilling into the ground a hammer plate attached to the drilling pipe for hammering into the ground. The hammer plate rotating along with the rotation of the innermost rotating pipe of the drilling pipe, providing high pressure compressed air to the pneumatic hammer bits fixed on the hammer plate for exerting pressure downwards on the rock, enabling fracturing of the rock and penetrating inside bore hole, simultaneously sucking out air and crushed rock out of the drilling pipe by means of an exhaust system.

Description

RILLING ASSEMBLY FOR DRILLING WELLS AND A METHOD OF DRILLING THEREOF

Field of the Invention - The present invention relates to the field of drilling water wells. More particularly it relates to a drilling assembly for drilling wells and a method of digging wells thereof.

Background of the invention -

Water is the most important element in life of living beings. Climate change and insufficient rains have led to Water scarcity all over the world. Failures of rain continuously for several years have led to drought- The earth is parched of water. Water reservoirs such as tanks, wells and other underground water supply sources have gone dry. Because of which, water is not available through tanks, hand pumps, welts and other sources of underground reserves of water. Farmers in some parts of India especially in Maharashtra state situated in India have committed suicide due to drought as they are unable to survive the drought situation.

Water Wells, bore wells and tube wells are dug to develop water reservoirs for human consumption, for producing crops and for consumption by cattle.

Well drilling methods have seen a marked change over the years. Well drilling methods known in the art range from the simple cable tool method, direct rotary, reverse-circulation and others including percussion and air-rotary drilling. These more advanced drilling methods made it possible to drill deeper and larger diameter wells.

However, the diameter of the well using such drilling mechanisms such as hammer drills, percussion drills, rotary drills, down the hole drilling to dig holes inside the earth for drilling water wells may be maximum upto three feet. It is required to dig a well of bigger diameter of more than three feet so that more underground water can be tapped from water beds and more water can be stored. By none of the mechanisms known in the art, can a well be dug of larger diameter of more than three fit except by digging manually. However, it takes months together for digging wells by manual labor and also it is very laborious. Labor may not be available easily.

Also, many a time after drilling operations, the bore wells are left open. Because of these, accidents occur as living beings may fall into the uncovered bore wells leading to casualties. Hence, there is a need to devise a system for mitigating the draw backs known in the art.

SUMMARY OF THE INVENTION -

The present invention relates to a drilling assembly for drilling wells comprising: a drilling pipe for drilling into the ground ; a hammer plate attached to the drilling pipe for hammering into the ground; said drilling pipe comprising of atleast three co-centric pipes - an innermost rotating pipe for rotating the hammer plate and carrying high pressure compressed air ; a central pipe encasing the innermost rotating pipe; an outer pipe encircling the central pipe forming a passage for passing the air and crushed material sucked from the bore hole to be thrown out of the drilling pipe; said hammer plate is an assembly of atleast three plates- a bottom plate bored with multiple hammer bits for hammering underground; a central plate provided with atleast one air tank for storing and supplying high pressure compressed air to said hammer bits; the said central plate further comprises an exhaust system for sucking air and crushed material from the bore hole and throwing them out of the drilling pipe; a top plate provided with atleast one air cylinder for preventing air leakage; wherein, the hammer plate rotates along with the rotation of the innermost rotating pipe, providing high pressure compressed air to the pneumatic hammer bits for exerting pressure downwards on the rock, enabling fracturing of the rock and penetrating inside bore hole, simultaneously sucking out air and crushed rock from the bore hole by means of the said exhaust system and throwing out of the drilling pipe through the passage of the outer pipe.

In yet another embodiment, wherein the drilling pipe is connected to high pressure air compressors through the drilling line which passes high pressure compressed air from the innermost rotating pipe to air tank in the central plate . In accordance with another aspect , wherein the central encasing pipe acts as a barrier, preventing the air and crushed material which are sucked out of the bore hole from coming in contact with the innermost rotating pipe. In a still further aspect, wherein the air and crushed material are sucked from the passage of the outer pipe by means of blower fitted to the drilling pipe.

According to one more aspect, wherein the outer pipe and central pipe are held together by means of atleast one clamping ring. In a further embodiment, wherein the clamping ring is provided with atleast one arrow shaped horizontal plate.

According to yet another aspect, wherein the said arrow shaped horizontal plate has its sharper end facing downwards and blunt end on the top side to prevent clogging of the crushed material getting out of the drilling pipe.

In accordance with yet another aspect , wherein the bottom plate of the hammer plate is provided with multiple pneumatic hammer bits for applying air pressure to break rocks.

One more aspect of the invention, wherein the central plate of the hammer plate is provided with an exhaust system by which air and crushed material is sucked from the bore hole and thrown up into the passage in the outer pipe of the drilling pipe. In a further embodiment, wherein the exhaust system comprises of a plurality of pockets arranged radially on the central plate such that air and crushed material can be sucked in from the bore hole.

Yet according to another aspect, wherein slots and grooves in the bottom plate and central plate of the hammer plate are provided so as to correspond with each other so that each fits into the other and the said bottom plate and said central plate are securely fixed together.

In a further embodiment , wherein the top plate of the hammer plate is made up of plurality of horizontally fitted plates so as to form a disc like structure.

According to another aspect , wherein the horizontal plates are provided With air cylinder to prevent air leakage.

In a still further aspect , wherein highly compressed air is supplied by means of pipelines from the inner most pipe to the said air cylinder.

Another aspect of the present invention, wherein the size of the hammer plate corresponds to the diameter of the well.

In one more aspect of the invention, wherein the diameter of the well is above three feet and less than twenty feet preferably the diameter ranges from seven feet to ten feet. In another aspect of the invention is a method for drilling well comprising the steps of- passing high pressure compressed air from drilling line into the innermost rotating pipe of the drilling pipe; supplying high pressure compressed air to the air tank in the central plate for storing air and supplying air to the pneumatic hammer bits for exerting pressure to crush rocks; rotating the central pipe along with the hammer plate so that the rotating pipe drills underground ; applying high pressure on the underground rock by means of pneumatic hammer bits provided on the hammer plate;, crushing the rocks into small particles; sucking air and crushed rock particles out of the bore hole into the passage between the central pipe and outer most pipe of the drilling pipe by means of an exhaust system in the central plate; throwing air and crushed rock particles out from the passage between the central pipe and outer most pipe of the drilling pipe by means of blower.

One more aspect further comprises of covering the bore Well with a load bearing mesh after the drilling operation is complete but before the truck is moved from the drilling site. This ensures the safety after drilling the bore well, so that there are no chances of living beings falling into the bore hole due to negligence caused by of uncovered wells. The method still further comprises of placing a protective lid at a distance above the load bearing mesh. Further objects and features of the present invention will be Understood more clearly with the help of the diagrams and description as under. Brief description of drawings -

The invention is described herein with the help of diagrams.

Fig.l- Illustrates the prior art depicting the bore well of small diameter.

Fig.l (A) - Illustrates the bore well of a bigger diameter as per the present invention. It depicts the tapping of more water beds and also more water storing capacity.

Fig.2 - Illustrates a diagrammatic representation of the well digging system according to the present invention.

Fig .3- Illustrates the drilling pipe of the invention. Fig.4 a - Illustrates the assembled hammer plate of the invention.

Fig.4 b - Illustrates the exploded view of the hammer plate along with the drilling pipe in accordance with the invention.

Fig-5 -Illustrates the method of drilling and sucking air and crushed material and throwing it out of the drilling pipe by means of blower.

Detailed Description-

Fig-1- Illustrates the bore well of the prior art having small diameter.

Fig.l (A¾ - Illustrates the bore well of a bigger diameter as per the present invention. It depicts the tapping of more water beds (B) from underground and also more water storing capacity (W) diie to large diameter. The diagram also shows a mesh (C) provided at the open top end of the bore well.

Fig-2- Illustrates well digging system in accordance with the present invention. The drilling assembly (A) comprises of a hammer plate (1) fixed at the bottom of the drilling pipe (2). At the top end of the drilling pipe is fixed a blower (3) for sucking high pressure air and crushed material from inside the bore hole and throwing it out. The drilling assembly (A) is placed in a casing pipe (12) which is fitted inside the well as a lining. A platform (4) is provided for operators to operate the drilling operation. A differential unit (5) houses the compressor, clutch plate and a gear box (Not shown) for sucking the crushed material and air out of the drilling assembly (A). A heavy engine compressor (8) having clutch plate and gear box with high horse power engine is provided which is fixed to the heavy duty truck (11) at point (17). A leveling plate (14) is provided to maintain the level of the heavy engine compressor (8). A box (10) having hydraulic jacks (7) are provided for the movement of the mast (9). A shaft coming out of this gear box rotates the drilling pipe (2). A plate (13) is provided for clamping casing pipe and drilling pipe (2). Through the plate (13) various pipelines (15) carrying oil to heavy engine compressor (8), high pressure compressed air to drilling pipe (2) of drilling assembly (A) etc. are provided. Power is supplied to the innermost drilling pipe through a shaft (16) connected to the differential unit (5) for rotating the drilling hammer. The drilling pipe (2) and casing pipe (12) are inserted into the bore hole through the plate (13) by means of handling pipe (6).

Fig-3 - Illustrates the diagrammatic representation of the drilling pipe (2).. The drilling pipe (2) is made of three co-centric pipes placed one inside the other. The innermost pipe (203) is of smaller diameter and the outermost pipe (201) is of biggest diameter. The innermost pipe (203) is the rotating pipe through which high pressure compressed air (P) is supplied to the hammer plate (1). The central pipe (202) is provided to cover the innermost rotating pipe (203). It acts as a barrier between the innermost rotating pipe (203) and the outer pipe (201) and creates a passage between the said two pipes so that air and crushed material sucked out of the bore hole are carried Out of the drilling pipe (2) through this passage. The bottom end of the drilling pipe (2) is fixed to the hammer plate (1). The outer pipe (201) and the central pipe (202) are held together by means of a clamping ring (204).The clamping ring is provided with arrow shaped horizontal plate (205).The said arrow shaped horizontal plate (205) has its sharper end facing downwards and blunt end on the top side to prevent clogging of the crushed material getting out of the drilling pipe (2) through the passage. There may be two clamping rings. One provided at the top of the drilling pipe and the other at the bottom of the drilling pipe.

Fig-4 fa) -Illustrates the assembly of the hammer plate (1) fixed to the drilling pipe (2). The diameter of the hammer plate (1) corresponds to the diameter of the well to be drilled. The hammer plate (1) rotates along with the drilling pipe (2) and simultaneously crushes the rocks and penetrates inside the rocks by means of pneumatic hammer bits (104). The crushed rock and air (X) is sucked out of the bore well by means of an exhaust system (108) provide on the hammer plate (1).

Fig-4 (b) - Illustrates an exploded view of the hammer plate (1) in accordance with the present invention. The hammer plate (1) is an assembly comprising of three plates - bottom plate (101), central plate (102) and top plate (103). The plates are placed one above the other and fixed rigidly. The bottom plate (101) is provided with multiple pneumatic hammer bits (104) for exerting pressure on the ground for penetrating and breaking into the rock. The bottom plate (101) is further provided with a plurality of slots (105) and fixing means to coincide with the grooves (106) in the middle plate (102) and to fit into it so as to be locked together. The center plate (102) is provided with a plurality of air tanks (107) to which high pressure compressed air is supplied through the inner most pipe {203} for storing and supplying high pressure compressed air (P) to the pneumatic hammer bits {104). The center plate {102) is further comprised of an exhaust system (108). The exhaust system comprises (108) of a plurality of pockets from which crushed material and air (X) from the bore hole is sucked in and thrown up into the passage formed by the central pipe {202} and the outer pipe (201) and out of the drilling pipe (2) into the air.

The top plate (103) is made of horizontal slidable plates (110) which are fixed together. Generally the slidable plates are four in number. The slidabe plates (110) are provided with atleast one air cylinder (109). The function of the air cylinder is to prevent leakage of air into the bore well which may occur in case, if there is an increase in the air pressure (P) in the innermost pipe. When high pressure compressed air (P) is supplied to the cylinder (109), the plates (110) slides in forward direction and touches the casing of the well (12), covering the gap between the hammer plate (1) and the well casing (12) thus preventing leakage of air. Pipes (111) carry high pressure compressed air (P) from the innermost rotating pipe (203) to the air cylinders (109). When there is no supply of high pressure compressed air (P) , each of the plates (110) is retracted back and remains in position. Frg-5- Illustrates the method of drilling and sucking air and crushed material and throwing it out of the drilling pipe by means of blower. During the drilling operation high pressure compressed air (P) from drilling line is passed into the innermost rotating pipe (203) of the drilling pipe (2) from where the high pressure compressed air (P) is supplied to the plurality of air tanks (107) provided in the central plate (102) for storing and supplying high pressure compressed air{P) to the pneumatic hammer bits (104).When the inner most pipe (203) rotates the hammer plate (1) also rotates along with the drilling pipe (2). When high pressure compressed air (P) is supplied to the pneumatic hammer bits (104), pressure is exerted on the pneumatic hammer bits (104) resulting in the downward pressure, because of which the pneumatic hammer bits (104) smash on the rocks thus crushing the rocks and penetrating deep underground and keeps on crushing the rocks into small particles that come in the way of the drilling pipe (2).

The rocks which are crushed into small particles in the bore hole have to be ejected out. This is done by sucking the air and crushed rock (X) particles out of the bore hole by means of an exhaust system (108) provided in the central plate (102) and sucking it up through the passage between the outer pipe (201) and the central pipe (202) of drilling pipe (2) by means of blower (3) and throwing it out of the drilling assembly (A)

The bore well hole is covered with a load bearing mesh (C) after the drilling operation is complete but before the truck is moved from the drilting site. Aceording to the invention the truck used for drilling operation cannot be moved unless the bore well hole is covered.

The present invention is advantageous in that big diameter bore wells can be drilled within a short span of time with very few human operators. The big size of the hammer plate increases the probability of tapping more water underground as compared to small sized tube wells because in small diameter bore wells drilling is done which is of a small diameter, which diminishes the probability of reaching underwater beds nearby. Thus failure rate of small diameter bore wells is high which increases the cost of drilling and also there is waste of time. Also, bigger the diameter more is the cross sectional area of the well, which increases the storing capacity of the well, thus more water can be stored and utilized. Also, by this method as soon as the digging operations are complete, the well is covered by a mesh which prevents falling of living beings into the bore wells which may happen if the bore wells are open without covering. The truck used for drilling cannot be moved unless the bore well is covered with a cover.

The foregoing description and the various embodiments of the invention and drawings are illustrated by way of example and not by way of limitation.

Claims

I Claim:

1) A drilling assembly for drilling wells comprising: a drilling pipe for drilling into the ground ; a hammer plate attached to the drilling pipe for hammering into the ground; said drilling pipe comprising of atleast three co-centric pipes - an innermost rotating pipe for rotating the hammer plate and carrying high pressure compressed air ; a centra I pipe encasing the innermost rotating pipe; an outer pipe encircling the central pipe forming a passage for passing the air and crushed material sucked from the bore hole to be thrown out of the drilling pipe; said hammer plate is an assembly of atleast three plates- a bottom plate bored with multiple hammer bits for hammering underground; a central plate provided with atleast one air tank for storing and supplying high pressure compressed air to said hammer bits; the said central plate further comprises an exhaust system for sucking air and crushed material from the bore hole and throwing them out of the drilling pipe; a top plate provided with atleast one air cylinder for preventing air leakage; wherein, the hammer plate rotates along with the rotation of the innermost rotating pipe, providing high pressure compressed air to the pneumatic hammer bits for exerting pressure downwards on the rock, enabling fracturing of the rock and penetrating inside bore hole, simultaneously sucking out air and crushed rock from the bore hole by means of the said exhaust system and throwing out of the drilling pipe through the passage of the outer pipe.

2) The drilling assembly as claimed in claim 1, wherein the drilling pipe is connected to high pressure air compressors through the drilling line which passes high pressure compressed air from the innermost rotating pipe to air tank in the central plate .

3) The drilling assembly as claimed in claim 1, wherein the central encasing pipe acts as a barrier, preventing the air and crushed material which are sucked out of the bore hole from coming in contact with the innermost rotating pipe. 4) The drilling assembly as claimed in claim 1, wherein the air and crushed material are sucked from the passage of the outer pipe by means of blower fitted to the drilling pipe. 5) The drilling assembly as claimed in claim 1, wherein the outer pipe and central pipe are held together by means of atleast one clamping ring.

6) The drilling assembly as claimed in claim 5, wherein the clamping ring is provided with atleast one arrow shaped horizontal plate.

7) The drilling assembly as claimed in claim 5, wherein the said arrow shaped horizontal plate has its sharper end facing downwards and blunt end on the top side to prevent clogging of the crushed material getting out of the drilling pipe.

8) The drilling assembly as claimed in claim 1, wherein the bottom plate of the hammer plate is provided with multiple pneumatic hammer bits for applying air pressure to break rocks. 9)The drilling assembly as claimed in claim 1, wherein the central plate of the hammer plate is provided , With an exhaust system by which air and crushed material is sucked from the bore hole and thrown up into the passage in the outer pipe of the drilling pipe.

10) The drilling assembly as claimed in claim 1, wherein the exhaust system comprises of a plurality of pockets arranged radially on the central plate such that air and crushed material can be sucked in from the bore hole.

11) The drilling assembly as claimed in claim 1, wherein slots and grooves in the bottom plate and central plate of the hammer plate are provided so as to correspond with each other so that each fits into the other and the said bottom plate and said central plate are securely fixed together.

12) The drilling assembly as claimed in claim 1, wherein the top plate of the hammer plate is made up of a plurality of horizontally fitted plates so as to form a disc like structure.

13) The drilling assembly as claimed in claim 12, wherein the horizontal plates are provided with air cylinder to prevent air leakage.

14) The drilling assembly as claimed in claim 12, wherein highly compressed air is supplied by means of pipelines from the inner most pipe to the said air cylinder.

15) The drilling assembly as claimed in claim 1, wherein the size of the hammer plate corresponds to the diameter of the well.

16) The drilling assembly as claimed in claim 1, wherein the diameter of the well is above three feet and less than twenty feet preferably the diameter ranges from seven feet to ten feet.

17) A method for drilling well comprising the steps of- passing high pressure compressed air from drilling line into the innermost rotating pipe of the drilling pipe; supplying high pressure compressed air to the air tank in the central plate for storing air and supplying air to the pneumatic hammer bits for exerting pressure to crush rocks; otating the central pipe along with the hammer plate so that theotating pipe drills underground ; pplying high pressure on the underground rock by means ofneumatic hammer bits provided on the hammer plate; rushing the rocks into small particles; ucking air and crushed rock particles out of the bore hole into theassage between the central pipe and outer most pipe of therilling pipe by means of an exhaust system in the central plate- hrowing air and crushed rock particles out from the passageetween the central pipe and outer most pipe of the drilling pipey means of blower, 8). The method as claimed in claim 17, further comprises ofovering the bore well with a load bearing mesh after the drillingperation is compfete but before the truck is moved from therilling site.