MXPA97001695A - Load configured for a drilling rod that has a main explosive body, including tatb and a sensi detonator - Google Patents
Load configured for a drilling rod that has a main explosive body, including tatb and a sensi detonatorInfo
- Publication number
- MXPA97001695A MXPA97001695A MXPA/A/1997/001695A MX9701695A MXPA97001695A MX PA97001695 A MXPA97001695 A MX PA97001695A MX 9701695 A MX9701695 A MX 9701695A MX PA97001695 A MXPA97001695 A MX PA97001695A
- Authority
- MX
- Mexico
- Prior art keywords
- explosive
- tatb
- main body
- detonator
- hns
- Prior art date
Links
- 239000002360 explosive Substances 0.000 title claims abstract description 190
- 238000011068 load Methods 0.000 title claims abstract description 38
- 238000005553 drilling Methods 0.000 title description 8
- JDFUJAMTCCQARF-UHFFFAOYSA-N TATB Chemical compound NC1=C([N+]([O-])=O)C(N)=C([N+]([O-])=O)C(N)=C1[N+]([O-])=O JDFUJAMTCCQARF-UHFFFAOYSA-N 0.000 claims abstract description 166
- 108060008082 TATB Proteins 0.000 claims abstract description 165
- 239000000203 mixture Substances 0.000 claims abstract description 48
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 34
- 238000005755 formation reaction Methods 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 21
- 238000005474 detonation Methods 0.000 description 14
- 230000035515 penetration Effects 0.000 description 13
- 239000004615 ingredient Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- -1 HNS Chemical compound 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000001902 propagating Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 235000012495 crackers Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000149 penetrating Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000644 propagated Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
Abstract
The present invention relates to: A shaped charge that includes an explosive main body and a detonator adapted to detonate said explosive main body. According to the present invention, the main body of the explosive now includes an explosive composition known as sim-triaminotrinitro benzene (TATB) and, since the TATB is not sensitive enough to be a detonator, the detonator must consist of an explosive composition that It is more sensitive than the TATB. It has been found that when the main body of explosive in a shaped charge is modified to include the explosive composition known as TATB, and when the detonator includes an explosive other than TATB, such as HNS or NONA or PYX or HMX, or a mixture of HNS or NONA or DODECA or PYX or HMX and TATB, and when the shaped charge is detonated, the detonated load will produce a jet that is greater in length than the jet associated with the shaped loads of the prior art, which did not have a main body of explosive that includes TATB. As a result, when the major jet is produced from the shaped charge of the present invention which has been modified to include an explosive main body comprising TATB, the longer jet will produce a larger perforation in a penetrated formation through a well of probing and, as a result, an increased amount of borehole fluid will be produced from the perforated formation. A detonating cord could also include the explosive TA
Description
"LOAD CONFIGURED FOR A DRILLING ROD THAT HAS A MAIN BODY OF EXPLOSIVE, INCLUDING TATB AND A SENSIBLE DETONATOR"
BACKGROUND OF THE INVENTION
The subject matter of the present invention relates to a shaped or hollow charge for use in a piercing barrel, including the shaped or hollow charge an explosive main body that also includes sim-triaminotrinitrobenzene (TATB) and a detonator, more sensitive than TATB , adapted to start the detonation of the main body of explosive. The subject matter is also related to other downhole explosive devices, such as casing and tubing cutters, boosters, detonating cord, and detonators. The configured or hollow charges include an explosive main body, known as a secondary explosive, which detonates when a cracker of the primary explosive detonates in response to a detonation wave propagating in a detonating cord. When the main body of the explosive is detonated, a jet is formed that propagates outward from the configured or hollow charge. The configured or hollow charges have been used in drilling guns and the drilling guns are used to drill a formation penetrated by a sounding. When the jet is formed from the configured or hollow charge in the piercing barrel, the jet perforates the formation and, in response, a sounding fluid of the perforated formation is produced. The length of the jet produced from the shaped or hollow charge will determine the length of perforation in the formation and potentially the amount of sounding fluid produced from the perforated formation. However, the length of the jet that propagates from the configured or hollow charge in the piercing cannon is determined, among other parameters, by the type of explosive that is used to constitute the main body of the explosive in the configured or hollow charge. For elevated temperatures, greater than the limits of the HMX temperature, an explosive known as HNS has been used in the main body of the explosive in configured or hollow charges in the piercing barrel. In addition, the configured or hollow loads that use HNS as the main body of the explosive have worked satisfactorily in the past. However, development efforts continue to focus on a better apparatus, compositions and methods for producing a longer jet that spreads from the configured or hollow charge. If a longer jet of the configured or hollow detonated charge occurs, the longer jet will produce a longer perforation in the formation, and a longer perforation in the formation penetrated by the borehole will potentially increase the production of the borehole fluid from the borehole. perforated formation. Therefore, a main object of this invention is related to providing an improved explosive composition adapted to be used in a shaped or hollow charge to produce a longer jet of the configured or hollow charge when the charge is detonated. Since the configured or hollow charge is adapted to be used in a piercing barrel to pierce a formation penetrated by a sounding, when the piercing barrel is detonated to the longer jet it will produce a longer perforation in the formation, and the longer bore will cause that increased amounts of the drilling fluid of the perforated formation are produced.
EXHIBITION DIGEST
Accordingly, a main object of the present invention is to provide an improved explosive composition adapted for use in a shaped or hollow charge, the improved explosive composition in the shaped or hollow face includes a detonator and an explosive main body, the main body of explosive, when detonated by the detonator, causes a longer jet to occur from the configured or hollow charge and the longer jet also produces a longer bore in a formation penetrated by a bore. A further object of the present invention is to provide a shaped or hollow load adapted for use, for example, in a perforating cannon, the configured or hollow charge includes an explosive main body that also includes an explosive composition known as sim-triaminotrinitrobenzene (hereinafter referred to as "TATB"), and a detonator adapted to initiate a detonation of the TATB explosive placed in the main body of the explosive, including the detonator an additional explosive composition that is more sensitive than the TATB alone. In accordance with these and other objects of the present invention, a shaped or hollow charge includes an explosive main body and a detonator that is adapted to initiate the detonation of the main body of the explosive, a jet of the configured or hollow charge being produced when the main body of the explosive is detonated. In accordance with the present invention, the main body of the explosive in the shaped or hollow charge now includes an explosive composition known as sim-triaminotrinitrobenzene (TATB). However, furthermore, since the TATB can not, by itself detonate by means of a detonation wave propagating in a detonator cord, in order to detonate the TATB in the main body of the explosive, the detonator must include an explosive composition. other than pure TATB, such as HNS, NONA, DODECA, PYX, HMX or some mixture of the detonator that is HNS, NONA, DODECA, PYX, HMX, with TATB. As a result, when the main body of the explosive in a configured or hollow charge is modified to include an explosive composition known as TATB, and when the detonator is modified to include another explosive composition that does not include the TATB that is adapted to detonate the TATB in the main body, the hollow shaped charge, when detonated, produces a jet that is longer in length than the jet associated with the configured or hollow loads of the prior art that did not have an explosive main body that included TATB ( and a detonator that does not consist solely of TATB). As a result, when the longer jet of the shaped or hollow charge of the present invention is produced, the longer jet will produce a longer perforation in a formation penetrated by a sounding and, as a result, an increased amount of the sounding from the perforated formation.
An additional field of applicability of the present invention will be apparent from the detailed description which will be presented below. It should be understood, however, that the detailed description of the specific examples even when representing a preferred embodiment of the present invention, are provided by way of illustration only, since various changes and modifications within the spirit and scope of the invention will be made evident to a person skilled in the art upon reading the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
A full understanding of the present invention will be obtained from the detailed description of the preferred embodiment presented hereinafter, and the accompanying drawings, which are provided by way of illustration only and are not intended to be limiting of the present invention. , and where: Figure 1 illustrates a configured or hollow charge that includes an explosive main body that also includes 100 percent TATB or a mixture of TATB and either HNS, PYX or HMX, and a detonator that does not include 100 percent of TATB, such as HNS, NONA, DODECA, PYX, HMX or a mixture of HNS, NONA, DODECA, PYX, HMX with TATB. Figure 2 illustrates a comparison of the pressed density versus the loading forces of HNS and TATB; and Figure 3 illustrates the sensitivity of TATB compared to HNS in the small-scale NOL space test.
DETAILED DESCRIPTION OF THE PREFERRED MODALITY
Referring to Figure 1, a typical shaped or hollow load adapted for use in a piercing gun is illustrated. The piercing barrel is adapted to be placed in a borehole. Such a configured or hollow charge is discussed in U.S. Patent Number 4,724,767 issued to Aseltine, issued February 16, 1988, and again in U.S. Patent Number 5,413,048 issued to Werner et al., Issued May 9, 1995, exposures of which are incorporated by reference in this specification. In Figure 1, the shaped or hollow charge includes a box 10, a main body of explosive material 12 which in the past has been either RDX, HMX, PYX or HNS which is packed against the inner wall of the box 10, a detonator 13 positioned adjacent the main body of the explosive 12 and adapted to detonate the main body of the explosive 12 when the detonator 13 is detonated, and a liner 14 that lines the detonator 13 and the main body of the explosive material 12. The shaped or hollow charge also includes an apex 18 and a skirt 16. A detonator cord 20 is brought into contact with the box 10 of the shaped or hollow charge at a point near the apex 18 of the liner 14 of the load. When the detonation wave propagates within the detonator cord 20, the detonation wave will detonate the detonator 13. When the detonator 13 is detonated, the detonation of the detonator 13 will further detonate the main body of the explosive 12 of the charge. In response to the detonation of the main body of the explosive 12, the liner 14 will form a jet 22 which will propagate along a longitudinal axis 24 of the configured or hollow charge. The jet 22 will perforate a formation penetrated by the sounding. As a result, the length of the jet 22 from the shaped or hollow charge of Figure 1 is a function of the explosive type comprising the main body of the explosive 12 in the shaped or hollow charge of Figure 1. However, since the jet 22 is formed when the main body of the explosive 12 is detonated, and since the main body of the explosive 12 is detonated when the detonator 13 is detonated, the type of explosive material comprising both the detonator 13 and the main body of the Explosive 12 must be selected carefully. Consequently, the length of the jet 22 from the shaped or hollow charge of Figure 1 is a function of both: (1) the type of the explosive material comprising the main body of the explosive 12, and (2) the type of the explosive material comprising the detonator 13. In the prior art, the main body of the explosive 12 was comprised of an explosive material known as either "RDX", "HMX", "PYX" or " HNS ". Therefore, the length of the jet 22 was a function of the type of explosive material and its density, which constituted the main body of the explosive 12 which was either RDX, HMX, PYX or HNS. However, in accordance with the present invention, it has been found that, when the main body of the explosive 12 comprises only an explosive material known as "Sim-triaminotrinitrobenzene" (hereinafter referred to as "TATB") or comprises a mixture of the material explosive of TATB with other explosive material such as HNS, PYX, or HMX, and when the detonator 13 is carefully selected to comprise a sensitive explosive material that does not include 100 percent TATB, such as HNS or NONA or DODECA or PYX or HMX or a mixture of HNS or NONA or DODECA or PYX or HMX with TATB, the length of the jet 22 is increased. Therefore, in accordance with the present invention, the shaped or hollow charge of the present invention shown in Figure 1 includes an explosive main body 12 and a detonator 13, wherein the detonation of the detonator 13 by the cord 22 the detonator detonates the main body of explosive 12, the detonation of the main body of explosive 12 produces jet 22, the main body of explosive 12 including the explosive material known as TATB, detonator 13 includes an explosive material that does not include 100 percent of the TATB explosive, such as HNS or NONA or DODECA or PYX or HMX or a mixture of HNS or NONA or DODECA or PYX or HMX with TATB. The detonator 13 must comprise a special explosive material other than 100 percent TATB, because the TATB itself is not sensitive enough to be included as part of the detonator 13. Therefore, the detonator 13 must be comprised of a special explosive material that is not 100 percent TATB, so that the detonator 13 is detonated, and that the special explosive material can be HNS or NONA or DODECA or PYX or HMX or a mixture of HNS or NONA or DODECA or PYX or HMX with TATB. However, when detonator 13 is detonated, the main body of explosive 12 including TATB can then be detonated. The TATB is actually (1, 3, 5-trinitro-2,4,6,6-triaminobenzene). A method for forming a fine granulated species of TATB is disclosed in US Patent Number 4,481,371 issued to Benziger, entitled "Method for Producing Fine Grain Triaminotrinitrobenzene", the exposure of which is incorporated by reference in this specification. It is a stable explosive at high temperature that is quite insensitive. In the past, the unique use of TATB has been in atomic bombs. However, it has been discovered that explosive TATB can be used as an ingredient in the main body of explosive 12 of shaped or hollow charges, such as those shown in Figure 1, if the TATB is sensitized by mixing with another explosive known as HNS, and it is reduced in particle size, or if a larger HNS detonator is used, or another more sensitive explosive detonator. When the main body of the explosive 12 of the configured or hollow face includes TATB, and the detonator 13 is carefully selected to comprise a sensitive explosive material other than TATB, such as HNS or NONA or PYX or HMX, the jet 22 produced from the configured or hollow load is increased in length in relation to the hollow configured loads of the prior art that did not include the TATB, as part of the main body of explosive 12. When TATB is included as an ingredient in the main body of explosive 12 of a configured or hollow charge, the TATB does not need to mix with another explosive; however, when the TATB is not mixed with another explosive, the TATB must consist of fine particle size granules or a charge 13 of the larger HNS detonator, or another more sensitive detonating explosive must of course be used. However, when the TATB is included as an ingredient in the main body of explosive 12 of a shaped or hollow charge, the TATB may be mixed with other explosive compositions such as HNS, PYX, HMX or other more sensitive explosives and, when mixed With these other explosive compositions, the TATB used in the main body of explosive 12 need not consist of granules of fine particle size to increase its sensitivity.
Work Example
The TATB was mixed with HNS in the following proportions (see Table 1 below), and the TATB / HNS mixture was used as the main body of explosive 12 of a new shaped or hollow charge of Figure 1. It will be recalled that, when the TATB is included within the main body of explosive 12, the explosive 13 detonator must not include 100 percent TATB. As a result, in this working example, detonator 13 included one of the following explosive materials "HNS or NONA, or DODECA or PYX or HMX or a detonator mixture of: HNS or NONA or DODECA or PYX or HMX with TATB. carried out tests using the new configured or hollow load The new configured or hollow loads were detonated under simulated well conditions When the new configured or hollow loads were detonated during the test, satisfactory tests were produced. a longer jet 22 was propagated from the configured or hollow charge when the charge was detonated, and the longer jet 22 produced a longer perforation in a formation penetrated by a borehole In fact, the longer bore represents an improvement of the bore. ten percent (10%) in the penetration, by the jet 22, of the formation, in relation to the penetration of the formation by means of the jets of the configured loads or hollows of the prior art that did not include TATB as an ingredient in the main body of the explosive. See Tables 1 and 2 below for the actual test results achieved using the TATB (mixed with HNS and HMX) in the main body of the explosive 12 of the configured or hollow charge. The results of the test in Table 1 represent the test results achieved when HNS was mixed with TATB, and the results of the test in Table 3 represent the test results achieved when HMX was mixed with TATB. We will take into account the following table 1 which represents the mixtures of TATB and HNS used as the main body of explosive 12 in the configured or hollow loads during the aforementioned satisfactory tests that yielded ten percent (10%) of better penetration by jet 22 of the formation in the sounding. However, of all the HNS / TATB mixtures, the 50 percent / 50 percent mixture of HNS / TATB represents the preferred embodiment in terms of satisfactory results. In fact, when the main body of explosive 12 of the configured or hollow charge of Figure 1 contained a mixture of HNS / TATB, wherein the mixture of HNS / TATB includes a scale of 0 percent to 75 percent of the HNS and a slat of 25 percent to 100 percent TATB, the jet produced from the configured or hollow charge after detonation will produce approximately ten percent (10%) better penetration of the formation in the survey relative to the configured loads or hollows of the prior art. In addition, satisfactory tests were also conducted in the test pit when the detonator 13 of the hollow shaped load did not include TATB and the main body of explosive 12 included a mixture of TATB and HMX in the following proportions: 50 percent mix / 50 percent of TATB / HMX. In addition, satisfactory tests were also carried out under simulated well conditions when the detonator 13 of the configured or hollow charge did not include TATB, and the main body of explosive 12 included pure TATB (no mixing with another explosive). However, in this case, the TATB in the main body of explosive 12 consisted of pure TATB of small particle size (sonified). We will take into account Tables 1 and 2 presented below that represent the actual test results achieved when the TATB is mixed with either HNS or HMX in the explosive main body 12 of the configured or hollow load of Figure 1 , and detonator 13 did not include TATB. The results of the test in Table 1 below show the percentage of HNS used in the main body of explosive 12 the percentage of TATB (mixed with HNS) used in the main body of explosive 12, the diameter of the hole in entry in the formation in centimeters produced by the jet 22 and the penetration of the formation (the length of the perforation in the formation) in centimeters produced by the jet 22.
Table 1
Operation of TATB / HNS in 22 grams of configured or hollow drilling load
HNS% TATB% Detonator Penetrating Inlet (cm) (cm)
100 0 .89 50.80 2 gr of HNS
75 25 .81 56.13 2 gr of HNS
50 50.81 57.40 2 gr of HNS
75.84 33.27 2 gr of HNS
0 100 torn 0.94 2 gr of HNS
0 100 (12 .82 58.42 2 gr of HNS microns) 0 100 .79 56.39 4 gr of HNS 0 100 (12 failure fault of 4 gr TATB microns) shot firing (5 microns) 50 50.84 56.13 2 gr ( 10% TATB of 5 microns, 90% of HNS) 50 50.86 23.11 2 gr (50% of TATB of 5 microns, 50% of HNS)
In Table 1 above, the HNS used to produce the results illustrated in Table 1 contained 2 percent chlorofluorocarbon and 0.5 percent graphite. The mies of TATB and HNS contained 38 micron TATB in the main body of the charge, and were initiated by a detonator containing fine particle HNS
(8 microns). All the firings in Table 1 mentioned above were done at 32 ° C. Note that the penetration increases first and then decreases as increased amounts of TATB are added to the main HNS. The optimal mix seems to be within the range of 40 percent to 60 percent of TATB. For higher percentage TATB quantities, operation decreases until the load is at the point of 100 percent TATB firing failure in the main explosive. Further improving the sensitivity of the load by increasing the amount of the HNS detonator from 2 grams to 4 grams, a main explosive composed of 100 percent TATB (38 microns) worked satisfactorily. We could not successfully detonate a fully TATB charge, even though we used a smaller particle (12 micron) and fine particle (5 micron) main detonator, a more sensitive detonator consisting of another more sensitive explosive material is needed. This however, does not prevent in a small amount of TATB being used as part of the detonator. For example, a detonator with 10 percent TATB and 90 percent HNS worked satisfactorily. However, they did not make the larger amounts of just TATB. The data in Table 1 above shows that, when the detonator 13 and the main body of explosive 12 in the oil well drilling loads completely contain TATB, the load will not work. However, if the sensitivity of the detonator 13 is increased by adding explosive materials more sensitive than the TATB, the TATB can be used as the main body of explosive 12, alone, or mixed with other explosives. In addition, the operation is improved. Results similar to those in Table 1 were obtained with loads of other sizes.
The results of the test in Table 2 below show that the percentage of HMX used in the main body of explosive 12, the percentage of TATB (mixed with HMX) used in the main body of explosive 12, the diameter of the hole in the formation in centimeters produced by the jet 22, and the penetration of the formation (the length of the perforation in the formation) in centimeters produced by the jet 22. The detonator 13 was HMX, which is more sensitive than the TATB.
Table 2
Operation of TATB / HMX in configured or hollow drilling loads of 34 grams
% HMX% TATB Penetration Hole Input (cm) (cm)
100 0 1.32 83.82 60 40 1.30 100.33 50 50 1.27 90.17
The results of Table 2 above show that mies of TATB and HMX (the HMX is a more powerful explosive than HNS) can also be used and provide superior performance to that of HMX alone. However, this was not a universal result. The increase in penetration seems to be specific to the load. Loads of another size exhibited only penetration equal to or slightly greater than the HMX alone. The results of the test in Table 3 below show that the percentage of PYX used in the main body of explosive 12, the percentage of TATB (mixed with PYX) used in the main body of explosive 12, the diameter of the hole in the formation in centimeters produced by the jet 22, and the penetration of the formation (the length of the perforation in the formation) in centimeters produced by the jet 22. The detonator 13 was PYX, which is known to be more sensitive than the TATB.Table 3 Performance of TATB / PYX in configured or hollow drilling loads of 22 grams
% PYX% TATB Penetration Hole Input (cm) (cm)
100 0 81 42.67 50 50 79 58.93 The results in Table 3 above show that mixtures of TATB and PYX can also be used and provide performance superior to that of PYX alone. Referring to Tables 4 and 5 presented below, a more comprehensive set of test results is illustrated. Tables 4 and 5 compare the test results achieved using the configured or hollow load of the prior art (where 100 percent HNS is used in the main body of explosive 12) and the test results achieved using the load configured or hollow of the present invention (wherein TATB is used in different proportions with and without HNS in the main body of explosive 12). However, note that two different types of HNS are used in conjunction with Tables 4 and 5. Table 4 uses a HNS load of 22 grams, and Table 5 uses a HNS load of 34 grams. In Tables 5 and 5, the first row of each frame represents the prior art data wherein the configured or hollow charge being tested includes an explosive main body 12 consisting of pure HNS. However, Tables 4 and 5, the second and third rows of the table represent the data in accordance with the present invention wherein the configured or hollow charge being tested includes an explosive main body 12 which also includes a TATB (and a detonator 13 that does not include TATB), the second row of each frame represents a mixture of TATB with HNS in the main body of explosive 12 (and detonator 13 not including TATB), the third row of each frame represents pure TATB in the main body of explosive 12 (and detonator 13 not including TATB). In addition, in Tables 4 and 5, a column is marked "loading force". The loading force represents the force applied when pressing the main body of TATB explosive 12 against the box 10.
Table 4
Strength Diameter LongiComments of the load Tuddle Hole penetra¬
(kg) of tract Entry
Previous Technique-load of 22 11.43 cm -gives: 17.252 86 51.49 cm cannon of large HNS used in body density principal shot of explosive target 12 concrete invention -load of 22 grams: 6,810 81 49.53 cm 11.43 cm - 50% HNS large cannon mix and 9, 080 54.61 cm density
50% of TATB 11,350 55.88 cm shot in the 13, 620 60.96 cm white body 15,890 58.42 cm concrete main explosive 12
mvencion-carga de 22 5,448 .74 59. .69 cm 8.57 cm -gives: 5,448 .89 54. .61 cm large cannon
100% of TATB 5,448 .81 67. .31 cm density of pure in 5,448 .84 52. .07 cm shot of concrete main body of explosive 12
Table 5
Force Diameter Length Comments of the Load Hole Pentra- (kg) of input
Previous Technique - Load of 34 grams: HNS used in 20.430 1.07 14.73 cm 8.57 cm - the main cannon body of explosive density 12 concrete shot invention-load of 34 grams: mixture of 6, 810 1.04 73.03 cm 8.57 cm - 50% HNS and large cannon
50% of TATB density in the concrete main body shot of explosive 12 invention -34 grams charge: 6,810 0.84 72.90 8.57 cm 100% TATB large pure cannon in the body density shot of explosive concrete main 12
Therefore, the results achieved by the configured or hollow charge of the present invention, which uses TATB as an ingredient of the main body of the explosive 12 and a detonator 13 not including TATB, illustrate an improvement of ten percent (10%) in the penetration of the formation in relation to the results achieved by the configured or hollow load of the prior art that do not use TATB with an ingredient in the main body of explosive 12. These results could not be achieved with a fully processed TATB load, since the load would stop detonating. It is necessary to achieve detonation, a more sensitive explosive detonator material. This advantage of the shaped or hollow load of the present invention relative to the configured or hollow load of the prior art (the 10 percent improvement) is due to a higher density (compressibility), the higher detonation velocity, and the lower crush resistance of the TATB in the main body of the explosive 12. The compressibility is an advantage because a higher density of the TATB can be achieved with the same loading force. Generally, a higher density produces more performance. However, the density of the explosive main charge is limited since it is compressed too much, the detonator of the configured or hollow charge will be overcompressed and the overpressure of the detonator may result in a reduction in the effectiveness sensitivity of the detonator. However, when TATB is used as an ingredient of the main body of the explosive 12, higher density or shaped bulk charges are produced, however, the loading forces as previously required remain the same. Since the higher density main loads are produced with the same load forces, the result is greater operation. Referring to Figure 2, a comparison of the pressed density versus the loading forces of HNS and TATB is illustrated. Referring to Figure 3, the sensitivity of TATB compared to HNS is illustrated in the small-scale space test NOL.
The specification of this indicated application has disclosed a configured or hollow charge that includes a main body of the explosive that also includes TATB or a mixture of TATB and another explosive. However, it should be evident that other devices could include the explosive TATB. For example, a detonating cord includes an explosive, and that explosive in the detonating cord could include the explosive TATB or a mixture of the explosive TATB and the explosive HNS, or a mixture of the explosive TATB and one of the other explosives mentioned in this specification, that have similar benefits and results. Having thus described the invention, it will be apparent that it can be varied in many ways. These variations should not be considered as a deviation from the spirit and scope of the invention and all these modifications that will be evident to a person skilled in the art are intended to be included within the scope of the following claims:
Claims (15)
1. A configured or hollow charge, comprising: a box; and a main body of the explosive in the box, the main body of the explosive includes sim-triaminotrinitrobenzene (TATB).
2. The configured or hollow charge, according to claim 1, further comprising: a detonator adapted to detonate the main body of the explosive, the detonator includes another explosive that does not include the TATB that is more sensitive than the TATB.
3. The configured or hollow charge, according to claim 2, wherein the detonator is selected from the group consisting of: HNS, NONA, DODECA, PYX and HMX.
4. The configured or hollow charge according to claim 2, wherein the main body of the explosive comprises a mixture of TATB, and an additional explosive, with the additional explosive being either HNS, NONA, DODECA, PYX, or HMX.
5. The configured or hollow charge according to claim 1, wherein the main body of the explosive comprises a mixture of TATB and HNS.
6. The configured or hollow charge according to claim 5, wherein the mixture of TATB and HNS includes a scale of zero percent (0 percent) to seventy-five percent (75%) of HNS and a scale of twenty-five per one hundred (25%) to one hundred percent (100%) of TATB.
7. A detonating cord, comprising: an explosive, the explosive includes sim-triaminotrinitrobenzene (TATB). A method for manufacturing a configured or hollow charge, comprising the steps of: (a) inserting a main body of explosive into a box, the main body of explosive includes sim-triaminotrinitrobenzene (TATB); (b) inserting a detonator into the box adapted to detonate the main body of the explosive, the detonator includes an explosive that is more sensitive to the TATB; and (c) insert a liner through the main body of the explosive. 9. A hollow shaped load comprising: a box; a main body of the explosive placed in the box, the main body of the explosion includes the si -triaminotrinitrobenzene (TATB); and a detonator placed in the box adapted to detonate the main body of the explosive, the detonator being more sensitive than the TATB. 10. The configured or hollow charge according to claim 9, wherein the detonator is selected from the group consisting of: HNS, NONA, DODECA, PYX, HMX. 11. The configured or hollow charge according to claim 9, wherein the detonator comprises a mixture of TATB with another explosive, the other explosive being either HNS, NONA, DODECA, PYX or HMX. 12. The configured or hollow charge according to claim 9, wherein the main body of the explosive includes approximately 100 percent TATB. 13. The configured or hollow charge according to claim 9, wherein the main body of explosive includes TATB and another explosive, with the other explosive being HNS. 14. The configured or hollow charge according to claim 13, wherein the main body of the explosive includes about 25 percent TATB and about 75 percent HNS. 15. The configured or hollow charge according to claim 13, wherein the main body of explosive includes about 40 percent of the TATB and about 60 percent of the HNS. SUMMARY OF THE INVENTION A configured or hollow charge includes an explosive main body and a detonator adapted to detonate the main body of the explosive. In accordance with the present invention, the main body of the explosive now includes an explosive composition known as sim-triaminotrinitrobenzene (TATB) and, since the TATB is not as sensitive as a detonator, the detonator must consist of an explosive composition and is more sensitive than the TATB. It has been discovered that, when the main body of the explosive had a configured or hollow charge is modified to include the explosive composition known as TATB and when the detonator includes an explosive other than TATB, such as HNS or NONA or PYX or HMX, or a mixture of HNS or NONA or DODECA or PYX or HMX and TATB, and when the configured or hollow charge is detonated, the detonated charge will produce a jet that is longer in length that the jet associated with the configured or hollow loads of the prior art that do not have a main body of the explosive that includes TATB. As a result, when the longer jet is produced from the hollow shaped charge of the present invention, which has been modified to include a main body of the device comprising TATB and a detonator that is more sensitive to TATB, the longer jet will produce a longer perforation in a formation penetrated with a sounding and, as a result, an increased amount of the sounding fluid will be produced from the perforated formation. A detonator cord may also include an explosive from TATB.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US08610025 | 1996-03-04 | ||
US08/610,025 US5597974A (en) | 1996-03-04 | 1996-03-04 | Shaped charge for a perforating gun having a main body of explosive including TATB and a sensitive primer |
Publications (2)
Publication Number | Publication Date |
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MXPA97001695A true MXPA97001695A (en) | 1998-04-01 |
MX9701695A MX9701695A (en) | 1998-04-30 |
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Application Number | Title | Priority Date | Filing Date |
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MX9701695A MX9701695A (en) | 1996-03-04 | 1997-03-04 | Shaped charge for a perforating gun having a main body of explosive including tatb and a sensitive primer. |
Country Status (9)
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US (1) | US5597974A (en) |
EP (1) | EP0794163B1 (en) |
CN (1) | CN100445240C (en) |
AU (1) | AU717255B2 (en) |
CA (1) | CA2198984C (en) |
DE (1) | DE69723599T9 (en) |
ID (1) | ID16123A (en) |
MX (1) | MX9701695A (en) |
NO (2) | NO308167B1 (en) |
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US6634300B2 (en) * | 2000-05-20 | 2003-10-21 | Baker Hughes, Incorporated | Shaped charges having enhanced tungsten liners |
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US6530326B1 (en) * | 2000-05-20 | 2003-03-11 | Baker Hughes, Incorporated | Sintered tungsten liners for shaped charges |
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-
1996
- 1996-03-04 US US08/610,025 patent/US5597974A/en not_active Expired - Lifetime
-
1997
- 1997-03-03 CA CA002198984A patent/CA2198984C/en not_active Expired - Fee Related
- 1997-03-03 NO NO970970A patent/NO308167B1/en not_active IP Right Cessation
- 1997-03-03 AU AU15068/97A patent/AU717255B2/en not_active Ceased
- 1997-03-04 MX MX9701695A patent/MX9701695A/en not_active IP Right Cessation
- 1997-03-04 ID IDP970670A patent/ID16123A/en unknown
- 1997-03-04 CN CNB97109506XA patent/CN100445240C/en not_active Expired - Fee Related
- 1997-03-04 DE DE69723599T patent/DE69723599T9/en active Active
- 1997-03-04 EP EP97301451A patent/EP0794163B1/en not_active Expired - Lifetime
-
2000
- 2000-03-23 NO NO20001517A patent/NO309715B1/en not_active IP Right Cessation
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