Method and apparatus and program storage device adapted for automatic drill string design based on wellbore geometry and trajectory requirements
A method of generating drillstring design information in response to input data which includes wellbore geometry and wellbore trajectory requirements, comprises the step of generating a summary of a drillstring in each hole section of a wellbore in response to the input data.
1. A method, practiced by a computer system, of well planning in a well planning system in response to input data including wellbore geometry and wellbore trajectory requirements, the computer system including a processor that is responsive to the input data, a recorder or display device, and a memory, the memory storing a software, the wellbore including a plurality of hole sections, comprising:
executing, by the processor, the software stored in the memory of the computer system in response to said input data and, in response to the executing step, generating, by the processor, a summary of a drillstring in each hole section of the wellbore, the summary of said drillstring providing a drillstring design for the wellbore geometry in each hole section of the wellbore; and
recording or displaying, by the recorder or display device, at least a portion of said summary of said drillstring in said each hole section of said wellbore on an output display of said recorder or display device, wherein said output display of said recorder or display device includes,
said plurality of hole sections arranged along a corresponding plurality of rows of said output display, and
for each hole section in each row of said output display, said at least a portion of said summary of said drillstring arranged along a plurality of columns associated with said each hole section in said each row of said output display.
2. The method of claim 1 , wherein the drillstring includes a plurality of components, the summary of the drillstring in each hole section of the wellbore including an outer diameter, a weight, and a length of one or more of said components of said drillstring in each hole section of said wellbore .
3. The method of claim 2 , wherein the plurality of components of the drillstring include a first drill collar (DC 1 ) of said drillstring, a second drill collar (DC 2 ) of said drillstring, a heavy weight (HW) of said drillstring, and a drill pipe (DP) of said drillstring.
4. The method of claim 3 , wherein step of generating, by the processor, a summary of a drillstring in each hole section of the wellbore comprises:
determining an outer diameter of said DC 1 , said DC 2 , said HW, and said DP of said drillstring;
determining a weight of said DC 1 , said DC 2 , and said HW of said drillstring;
determining a length of said DC 1 , said DC 2 , said HW, and said DP of said drillstring; and
determining a tensile risk of said drillstring.
5. The method of claim 4 , wherein the step of determining an outer diameter of said DC 1 , said DC 2 , said HW, and said DP of said drillstring comprises:
determining an outer diameter of said DC 1 (DC 1 OD ) from a table using a hole size;
determining an outer diameter of said DC 2 (DC 2 OD ) by using a stiffness ratio (SR), where:
SR=Z BIG /Z SMALL , and where
Z= (Π/32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
DC2 OD <=DC1 OD &DC2 OD>=DP OD , and
determining an outer diameter of said HW (HW OD ) by using said stiffness ratio (SR), where,
SR=Z BIG /Z SMALL ,
Z= (Π/32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
HW OD <=DC2 OD &HW OD >=DP OD , and where
DP OD <=HW OD ; and
determining an outer diameter of said DP (DP OD ) by using a stiffness ratio (SR), where an outer diameter of said DP (DP OD ) is obtained from a table using the hole size and DP OD <=DC 1 OD .
6. The method of claim 4 wherein the step of determining a weight of said DC 1 , said DC 2 , and said HW of said drillstring comprises:
determining a maximum weight-on-bit (WOB) used in the hole section; and
determining a weight of said DC 1 , said DC 2 , and said HW, where ‘θ’ is used for a wellbore inclination and ‘DF’ is a design factor, and where,
HW
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
5
+
θ
100
)
,
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
95
-
θ
100
)
,
or
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
-
HW
w
,
DC
1
W
=
DC
1
L
*
DC
1
WFT
,
and
DC
2
W
=
(
DC
1
+
DC
2
)
-
DC
1.
7. The method of claim 4 , wherein the step of determining a length of said DC 1 , said DC 2 , said HW, and said DP of said drillstring comprises:
determining a length of said DC 1 , said DC 2 , said HW, and said DP, where,
DC 1 −DC 1 L =90 Feet=1 Stand=3 Joint,
DC 2 −DC 2 L =DC 2 w /DC 2 WFT ,
HW−HW L =HW W /HW WFT , and
DP−DP L =(Bit Section Length)−( DC 1 L −DC 2 L −HW L ).
8. The method of claim 4 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, comprises:
an outer diameter (OD) of the first drill collar (DC 1 ) of said drillstring.
9. The method of claim 8 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of the second drill collar (DC 2 ) of said drillstring.
10. The method of claim 9 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of a heavy weight (HW) of said drillstring.
11. The method of claim 10 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of a drill pipe (DP) of said drillstring.
12. The method of claim 11 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a maximum weight of a weight-on-bit (WOB) in each hole section of said drill string.
13. The method of claim 12 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a first drill collar (DC 1 ) of said drillstring.
14. The method of claim 13 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a second drill collar (DC 2 ) of said drillstring.
15. The method of claim 14 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a heavy weight (HW) of said drillstring.
16. The method of claim 15 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a first drill collar (DC 1 ) of said drillstring.
17. The method of claim 16 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a second drill collar (DC 2 ) of said drillstring.
18. The method of claim 17 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a heavy weight (HW) of said drillstring.
19. The method of claim 18 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a drill pipe (DP) of said drillstring.
20. The method of claim 19 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a tensile risk of said drillstring.
21. The method of claim 20 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a cost figure associated with said drillstring.
22. The method of claim 21 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a kick tolerance associated with said drillstring.
23. A program storage device readable by a processor tangibly embodying a set of instructions executable by the processor to perform method steps, which are practiced by a computer system, of well planning in a well planning system in response to input data including wellbore geometry and wellbore trajectory requirements, the computer system including the processor that is responsive to the input data, a recorder or display device, and the program storage device which stores the instructions, the wellbore including a plurality of hole sections, the method steps comprising:
executing, by the processor, the instructions stored in the program storage device of the computer system in response to said input data and, in response to the executing step, generating, by the processor, a summary of a drillstring in each hole section of the wellbore, the summary of said drillstring providing a drillstring design for the wellbore geometry in each hole section of the wellbore; and
recording or displaying, by the recorder or display device, at least a portion of said summary of said drillstring in said each hole section of said wellbore on an output display of said recorder or display device, wherein said output display of said recorder or display device includes,
said plurality of hole sections arranged along a corresponding plurality of rows of said output display, and
for each hole section in each row of said output display, said at least a portion of said summary of said drillstring arranged along a plurality of columns associated with said each hole section in said each row of said output display.
24. The program storage device of claim 23 , wherein the drillstring includes a plurality of components, the summary of the drillstring in each hole section of the wellbore including an outer diameter, a weight, and a length of one or more of said components of said drillstring in each hole section of said wellbore.
25. The program storage device of claim 24 , wherein the plurality of components of the drillstring include a first drill collar (DC 1 ) of said drillstring, a second drill collar (DC 2 ) of said drillstring, a heavy weight (HW) of said drillstring, and a drill pipe (DP) of said drillstring.
26. The program storage device of claim 25 , wherein step of generating, by the processor, a summary of a drillstring in each hole section of the wellbore comprises:
determining an outer diameter of said DC 1 , said DC 2 , said HW, and said DP of said drillstring;
determining a weight of said DC 1 , said DC 2 , and said HW of said drillstring;
determining a length of said DC 1 , said DC 2 , said HW, and said DP of said drillstring; and
determining a tensile risk of said drillstring.
27. The program storage device of claim 26 , wherein the step of determining an outer diameter of said DC 1 , said DC 2 , said HW, and said DP of said drillstring comprises:
determining an outer diameter of said DC 1 (DC 1 OD ) from a table using a hole size;
determining an outer diameter of said DC 2 (DC 2 OD ) by using a stiffness ratio (SR), where:
SR=Z BIG /Z SMALL , and where
Z= (Π/32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
DC2 OD <=DC1 OD &DC2 OD >=DP OD , and
determining an outer diameter of said HW (HW OD ) by using said stiffness ratio (SR), where
SR=Z BIG /Z SMALL ,
Z= (Π/32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
HW OD <=DC2 OD &HW OD >=DP OD , and where
DP OD <=HW OD ; and
determining an outer diameter of said DP (DP OD ) by using a stiffness ratio (SR), where an outer diameter of said DP (DP OD ) is obtained from a table using the hole size and DP OD <=DC 1 OD .
28. The program storage device of claim 26 wherein the step of determining a weight of said DC 1 , said DC 2 , and said HW of said drillstring comprises:
determining a maximum weight-on-bit (WOB) used in the hole section; and
determining a weight of said DC 1 , said DC 2 , and said HW, where ‘θ’ is used for a wellbore inclination and ‘DF’ is a design factor, and where,
HW
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
5
+
θ
100
)
,
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
95
-
θ
100
)
,
or
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
-
HW
w
,
DC
1
W
=
DC
1
L
*
DC
1
WFT
,
and
DC
2
W
=
(
DC
1
+
DC
2
)
-
DC
1.
29. The program storage device of claim 26 , wherein the step of determining a length of said DC 1 , said DC 2 , said HW, and said DP of said drillstring comprises:
determining a length of said DC 1 , said DC 2 , said HW, and said DP, where,
DC 1 −DC 1 L =90 Feet=1 Stand =3 Joint,
DC 2 −DC 2 L =DC 2 w /DC 2 WFT ,
HW−HW L =HW W /HW WFT , and
DP−DP L =(Bit Section Length)−( DC 1 L −DC 2 L −HW L ).
30. The program storage device of claim 26 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, comprises:
an outer diameter (OD) of the first drill collar (DC 1 ) of said drillstring.
31. The program storage device of claim 30 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of the second drill collar (DC 2 ) of said drillstring.
32. The program storage device of claim 31 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of a heavy weight (HW) of said drillstring.
33. The program storage device of claim 32 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of a drill pipe (DP) of said drillstring.
34. The program storage device of claim 33 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a maximum weight of a weight-on-bit (WOB) in each hole section of said drill string.
35. The program storage device of claim 34 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a first drill collar (DC 1 ) of said drillstring.
36. The program storage device of claim 35 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a second drill collar (DC 2 ) of said drillstring.
37. The program storage device of claim 36 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a heavy weight (HW) of said drillstring.
38. The program storage device of claim 37 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a first drill collar (DC 1 ) of said drillstring.
39. The program storage device of claim 38 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a second drill collar (DC 2 ) of said drillstring.
40. The program storage device of claim 39 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a heavy weight (HW) of said drillstring.
41. The program storage device of claim 40 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a drill pipe (DP) of said drillstring.
42. The program storage device of claim 41 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a tensile risk of said drillstring.
43. The program storage device of claim 42 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a cost figure associated with said drillstring.
44. The program storage device of claim 43 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a kick tolerance associated with said drillstring.
45. A computer program stored in a processor readable medium and adapted to be executed by a processor of a computer system, said computer program, when executed by the processor, conducting a process of well planning in a well planning system in response to input data including wellbore geometry and wellbore trajectory requirements, the computer system including the processor that is responsive to the input data, a recorder or display device, and the processor readable medium which stores the computer program, the wellbore including a plurality of hole sections, said process comprising:
executing, by the processor, the computer program stored in the processor readable medium of the computer system in response to said input data and, in response to the executing step, generating, by the processor, a summary of a drillstring in each hole section of the wellbore , the summary of said drillstring providing a drillstring design for the wellbore geometry in each hole section of the wellbore; and
recording or displaying, by the recorder or display device, at least a portion of said summary of said drillstring in said each hole section of said wellbore on an output display of said recorder or display device, wherein said output display of said recorder or display device includes,
said plurality of hole sections arranged along a corresponding plurality of rows of said output display, and
for each hole section in each row of said output display, said at least a portion of said summary of said drillstring arranged along a plurality of columns associated with said each hole section in said each row of said output display.
46. The computer program of claim 45 , wherein the drillstring includes a plurality of components, the summary of the drillstring in each hole section of the wellbore including an outer diameter, a weight, and a length of one or more of said components of said drillstring in each hole section of said wellbore .
47. The computer program of claim 46 , wherein the plurality of components of the drillstring include a first drill collar (DC 1 ) of said drillstring, a second drill collar (DC 2 ) of said drillstring, a heavy weight (HW) of said drillstring, and a drill pipe (DP) of said drillstring.
48. The computer program of claim 47 , wherein step of generating, by the processor, a summary of a drillstring in each hole section of the wellbore comprises:
determining an outer diameter of said DC 1 , said DC 2 , said HW, and said DP of said drillstring;
determining a weight of said DC 1 , said DC 2 , and said HW of said drillstring;
determining a length of said DC 1 , said DC 2 , said HW, and said DP of said drillstring; and
determining a tensile risk of said drillstring.
49. The computer program of claim 48 , wherein the step of determining an outer diameter of said DC 1 , said DC 2 , said HW, and said DP of said drillstring comprises:
determining an outer diameter of said DC 1 (DC 1 OD ) from a table using a hole size;
determining an outer diameter of said DC 2 (DC2 OD ) by using a stiffness ratio (SR), where:
SR=Z BIG /Z SMALL , and where
Z= (Π/32)((OD 4 −ID 4 )/ OD ),
SR<3.5, and
DC2 OD <=DC1 OD &DC2 OD >=DP OD , and
determining an outer diameter of said HW (HW OD ) by using said stiffness ratio (SR), where
SR=Z BIG /Z SMALL ,
Z= (Π/32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
HW OD <=DC2 OD &HW OD >=DP OD , and where
DP OD <=HW OD ; and
determining an outer diameter of said DP (DP OD ) by using a stiffness ratio (SR), where an outer diameter of said DP (DP OD ) is obtained from a table using the hole size and DP OD <=DC 1 OD .
50. The computer program of claim 48 , wherein the step of determining a weight of said DC 1 , said DC 2 , and said HW of said drillstring comprises:
determining a maximum weight-on-bit (WOB) used in the hole section; and
determining a weight of said DC 1 , said DC 2 , and said HW, where ‘θ’ is used for a wellbore inclination and ‘DF’ is a design factor, and where,
HW
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
5
+
θ
100
)
,
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
95
-
θ
100
)
,
or
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
-
HW
w
,
DC
1
W
=
DC
1
L
*
DC
1
WFT
,
and
DC
2
W
=
(
DC
1
+
DC
2
)
-
DC
1.
51. The computer program of claim 48 , wherein the step of determining a length of said DC 1 , said DC 2 , said HW, and said DP of said drillstring comprises:
determining a length of said DC 1 , said DC 2 , said HW, and said DP, where,
DC 1− DC 1 L =90 Feet =1 Stand =3 Joint,
DC 2− DC 2 L =DC 2 W /DC 2 WFT ,
HW−HW L =HW W /HW WFT , and
DP−DP L =(Bit Section Length)−( DC 1 L −DC 2 L −HW L ).
52. The computer program of claim 48 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, comprises:
an outer diameter (OD) of the first drill collar (DC 1 ) of said drillstring.
53. The computer program of claim 52 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of the second drill collar (DC 2 ) of said drillstring.
54. The computer program of claim 53 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of a heavy weight (HW) of said drillstring.
55. The computer program of claim 54 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
an outer diameter (OD) of a drill pipe (DP) of said drillstring.
56. The computer program of claim 55 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a maximum weight of a weight-on-bit (WOB) in each hole section of said drill string.
57. The computer program of claim 56 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a first drill collar (DC 1 ) of said drillstring.
58. The computer program of claim 57 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a second drill collar (DC 2 ) of said drillstring.
59. The computer program of claim 58 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a weight of a heavy weight (HW) of said drillstring.
60. The computer program of claim 59 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a first drill collar (DC 1 ) of said drillstring.
61. The computer program of claim 60 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a second drill collar (DC 2 ) of said drillstring.
62. The computer program of claim 61 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a heavy weight (HW) of said drillstring.
63. The computer program of claim 62 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a length of a drill pipe (DP) of said drillstring.
64. The computer program of claim 63 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a tensile risk of said drillstring.
65. The computer program of claim 64 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a cost figure associated with said drillstring.
66. The computer program of claim 65 , wherein said at least a portion of said summary of said drillstring, which corresponds to said each hole section in said each row of said output display, further comprises:
a kick tolerance associated with said drillstring.
67. A program storage device readable by a machine tangibly embodying a set of instructions executable by the machine to perform method steps, which are practiced by a computer system, of well planning in a well planning system in response to input data including wellbore geometry and wellbore trajectory requirements, the computer system including a processor that is responsive to the input data, a recorder or display device, and a memory, the memory storing a software, the wellbore including a plurality of hole sections, the method steps comprising:
executing, by the processor, the software stored in the memory of the computer system in response to said input data and, in response to the executing step, generating, by the processor, a summary of a drillstring in each hole section of the wellbore, the summary of said drillstring providing a drillstring design for the wellbore geometry in each hole section of the wellbore; and
recording or displaying, by the recorder or display device, at least a portion of said summary of said drillstring in said each hole section of said wellbore on an output display of said recorder or display device, wherein said output display of said recorder or display device includes,
said plurality of hole sections, and
for each hole section on said output display, said at least a portion of said summary of said drillstring associated with said each hole section on said output display.
68. A computer system adapted for well planning in a well planning system in response to input data including wellbore geometry and wellbore trajectory requirements, the wellbore including a plurality of hole sections, comprising:
a processor responsive to the input data;
a recorder or display device; and
a memory storing a software;
the processor executing the software stored in the memory of the computer system in response to said input data and, in response thereto, the processor generating a summary of a drillstring in each hole section of the wellbore, the summary of said drillstring providing a drillstring design for the wellbore geometry in each hole section of the wellbore; and
the recorder or display device recording or displaying at least a portion of said summary of said drillstring in said each hole section of said wellbore on an output display, wherein said output display being recorded or displayed on said recorder or display device includes,
said plurality of hole sections, and
for each hole section on said output display, said at least a portion of said summary of said drillstring associated with said each hole section on said output display.
69. The computer system of claim 68 , wherein: the plurality of hole sections are arranged along a plurality of rows on said output display, and said at least a portion of said summary of said drillstring associated with said each hole section are arranged along a plurality of columns for each row of said output display.
70. A method, practiced by a computer system, of well planning in a well planning system including automatically generating a required number of drillstrings to support a set of weight requirements of each drill bit, a set of directional requirements of a wellbore trajectory, and a set of mechanical requirements of a rig and drill pipe in response to input data including wellbore geometry and wellbore trajectory requirements, the computer system including a processor, a recorder or display device, and a memory that stores a software, the wellbore including one or more hole sections, comprising:
executing, by the processor, the software stored in the memory in response to said input data, and, responsive thereto, generating, by the processor, a summary of a drillstring for each hole section of a wellbore, the summary providing a drillstring design of the wellbore geometry for each hole section of the wellbore, wherein the step of generating, by the processor, a summary of the drillstring for each hole section of the wellbore includes:
generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP);
generating a weight of the drill collars (DC) and a weight of the heavy weight (HW); and
generating a length of the drill collars (DC), a length of the heavy weight (HW), and a length of the drill pipe (DP); and
recording or displaying, by the recorder or display device, at least a portion of said summary of said drillstring for said each hole section of said wellbore on an output display of said recorder or display device, wherein said output display includes,
a plurality of hole sections, and
for each hole section of said plurality of hole sections, a summary of the drillstring for said each hole section, the summary of the drillstring for said each hole section including an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP), a weight of the drill collars (DC), a weight of the heavy weight (HW), a length of the drill collars (DC), a length of the heavy weight (HW), and a length of the drill pipe (DP).
71. The method of claim 70 , wherein the output display includes a plurality of rows and a plurality of columns, the plurality of hole sections being arranged along said plurality of rows of said output display, one hole section being reserved for each row, and for each hole section in each row of said output display, the summary of the drillstring for said each hole section being arranged along said plurality of columns of said output display.
72. The method of claim 71 , wherein the one or more drill collars (DC) include a first drill collar (DC 1 ) and a second drill collar (DC 2 ), and wherein the step of generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP) comprises:
determining an outer diameter of said DC 1 (DC 1 OD ) from a table using a hole size; and
determining an outer diameter of said DP (DP OD ) by using a stiffness ratio (SR), where an outer diameter of said DP (DP OD ) is obtained from a table using the hole size and DP OD <=DC 1 OD .
73. The method of claim 72 , wherein the step of generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP) further comprises:
determining an outer diameter of said DC 2 (DC 2 OD ) by using said stiffness ratio (SR), where:
SR=Z BIG /Z SMALL , and where
Z= (Π/32)((OD 4 −ID 4 )/ OD ),
SR<3.5, and
DC2 OD <=DC1 OD &DC2 OD >=DP OD .
74. The method of claim 73 , wherein the step of generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP) further comprises:
determining an outer diameter of said HW (HW OD ) by using said stiffness ratio (SR), where:
SR=Z BIG /Z SMALL ,
Z= (Π/32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
HW OD <=DC2 OD &HW OD >=DP OD , and where
DP OD <=HW OD .
75. The method of claim 71 , wherein the drill collars include said (DC 1 ) and said (DC 2 ), and wherein the step of generating a weight of the drill collars (DC) and a weight of the heavy weight (HW) of said drillstring comprises:
determining a maximum weight-on-bit (WOB) used in the hole section; and
determining a weight of said DC 1 , said DC 2 , and said HW, where ‘θ’ is used for a wellbore inclination and ‘DF’ is a design factor, and where,
HW
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
5
+
θ
100
)
,
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
95
-
θ
100
)
,
or
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
-
HW
w
,
DC
1
W
=
DC
1
L
*
DC
1
WFT
,
and
DC
2
W
=
(
DC
1
+
DC
2
)
-
DC
1.
76. The method of claim 71 , wherein the drill collars include said (DC 1 ) and said (DC 2 ), and wherein the step of generating a length of the drill collars (DC), a length of the heavy weight (HW), and a length of the drill pipe (DP) comprises:
determining a length of said DC 1 , said DC 2 , said HW, and said DP, where,
DC 1 −DC 1 L =90 Feet=1 Stand=3 Joint,
DC 2 −DC 2 L =DC 2 W /DC 2 WFT ,
HW−HW L =HW W /HW WFT , and
DP−DP L =(Bit Section Length)−( DC 1 L −DC 2 L −HW L ).
77. A program storage device readable by a processor tangibly embodying a set of instructions executable by the processor to perform method steps, which are practiced by a computer system, of well planning in a well planning system including automatically generating a required number of drillstrings to support a set of weight requirements of each drill bit, a set of directional requirements of a wellbore trajectory, and a set of mechanical requirements of a rig and drill pipe in response to input data including wellbore geometry and wellbore trajectory requirements, the computer system including the processor, a recorder or display device, and the program storage device that stores the instructions, the wellbore including one or more hole sections, the method steps comprising:
executing, by the processor, the instructions stored in the program storage device in response to said input data, and, responsive thereto, generating, by the processor, a summary of a drillstring for each hole section of a wellbore, the summary providing a drillstring design of the wellbore geometry for each hole section of the wellbore, wherein the step of generating, by the processor, a summary of the drillstring for each hole section of the wellbore includes:
generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP);
generating a weight of the drill collars (DC) and a weight of the heavy weight (HW); and
generating a length of the drill collars (DC), a length of the heavy weight (HW), and a length of the drill pipe (DP); and
recording or displaying, by the recorder or display device, at least a portion of said summary of said drillstring for said each hole section of said wellbore on an output display of said recorder or display device, wherein said output display includes,
a plurality of hole sections, and
for each hole section of said plurality of hole sections, a summary of the drillstring for said each hole section, the summary of the drillstring for said each hole section including an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP), a weight of the drill collars (DC), a weight of the heavy weight (HW), a length of the drill collars (DC), a length of the heavy weight (HW), and a length of the drill pipe (DP).
78. The program storage device of claim 77 , wherein the output display includes a plurality of rows and a plurality of columns, the plurality of hole sections being arranged along said plurality of rows of said output display, one hole section being reserved for each row, and for each hole section in each row of said output display, the summary of the drillstring for said each hole section being arranged along said plurality of columns of said output display.
79. The program storage device of claim 78 , wherein the one or more drill collars (DC) include a first drill collar (DC 1 ) and a second drill collar (DC 2 ), and wherein the step of generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP) comprises:
determining an outer diameter of said DC 1 (DC 1 OD ) from a table using a hole size; and
determining an outer diameter of said DP (DP OD ) by using a stiffness ratio (SR), where an outer diameter of said DP (DP OD ) is obtained from a table using the hole size and DP OD <=DC 1 OD .
80. The program storage device of claim 79 , wherein the step of generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP) further comprises:
determining an outer diameter of said DC 2 (DC 2 OD ) by using said stiffness ratio (SR), where:
SR=Z BIG /Z SMALL , and where
Z= (Π/32)((OD 4 −ID 4 )/ OD ),
SR<3.5, and
DC2 OD <=DC1 OD &DC2 OD >=DP OD .
81. The program storage device of claim 80 , wherein the step of generating an outer diameter of one or more drill collars (DC), an outer diameter of a heavy weight (HW), and an outer diameter of a drill pipe (DP) further comprises:
determining an outer diameter of said HW (HW OD ) by using said stiffness ratio (SR), where:
SR=Z BIG /Z SMALL ,
Z=(Π/ 32)(( OD 4 −ID 4 )/ OD ),
SR<3.5, and
HW OD <=DC2 OD & HW OD >=DP OD , and where
DP OD <=HW OD .
82. The program storage device of claim 78 , wherein the drill collars include said (DC 1 ) and said (DC 2 ), and wherein the step of generating a weight of the drill collars (DC) and a weight of the heavy weight (HW) of said drillstring comprises:
determining a maximum weight-on-bit (WOB) used in the hole section; and
determining a weight of said DC 1 , said DC 2 , and said HW, where ‘θ’ is used for a wellbore inclination and ‘DF’ is a design factor, and where,
HW
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
5
+
θ
100
)
,
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
(
95
-
θ
100
)
,
or
DC
1
w
+
DC
2
w
=
WOB
(
DF
)
K
b
*
COS
(
θ
)
-
HW
w
,
DC
1
W
=
DC
1
L
*
DC
1
WFT
,
and
DC
2
W
=
(
DC
1
+
DC
2
)
-
DC
1.
83. The program storage device of claim 78 , wherein the drill collars include said (DC 1 ) and said (DC 2 ), and wherein the step of generating a length of the drill collars (DC), a length of the heavy weight (HW), and a length of the drill pipe (DP) comprises:
determining a length of said DC 1 , said DC 2 , said HW, and said DP, where,
DC 1 −DC 1 L =90 Feet=1 Stand=3 Joint,
DC 2 −DC 2 L =DC 2 W /DC 2 WFT ,
HW−HW L =HW W /HW WFT , and
DP−DP L =(Bit Section Length)−( DC 1 L −DC 2 L −HW L ).