IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0537629
(2000-03-29)
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발명자
/ 주소 |
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대리인 / 주소 |
Nelson Mullins Riley & Scarborough, LLP
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인용정보 |
피인용 횟수 :
66 인용 특허 :
14 |
초록
▼
A blowout preventer (BOP) protector is adapted to support a tubing string in a wellbore so that the tubing string is directly accessible during a well treatment to stimulate production. The BOP protector includes a mandrel having a sealing assembly mounted to its bottom end for pack-off in a casing
A blowout preventer (BOP) protector is adapted to support a tubing string in a wellbore so that the tubing string is directly accessible during a well treatment to stimulate production. The BOP protector includes a mandrel having a sealing assembly mounted to its bottom end for pack-off in a casing of a well to be stimulated. The mandrel is connected at its top end to a fracturing head, including a central passage and radial passages in fluid communication with the central passage. The mandrel is locked in a fixed position by a lockdown nut that prevents upward movement induced by fluid. pressures in the wellbore. The advantages are that the BOP protector permits access to the tubing string during well treatment and enables an operator to move the tubing string up and down or run coil tubing into or out of the wellbore without removing the tool. This reduces operation costs, saves time and enables many new procedures that were previously impossible or impractical.
대표청구항
▼
A blowout preventer (BOP) protector is adapted to support a tubing string in a wellbore so that the tubing string is directly accessible during a well treatment to stimulate production. The BOP protector includes a mandrel having a sealing assembly mounted to its bottom end for pack-off in a casing
A blowout preventer (BOP) protector is adapted to support a tubing string in a wellbore so that the tubing string is directly accessible during a well treatment to stimulate production. The BOP protector includes a mandrel having a sealing assembly mounted to its bottom end for pack-off in a casing of a well to be stimulated. The mandrel is connected at its top end to a fracturing head, including a central passage and radial passages in fluid communication with the central passage. The mandrel is locked in a fixed position by a lockdown nut that prevents upward movement induced by fluid. pressures in the wellbore. The advantages are that the BOP protector permits access to the tubing string during well treatment and enables an operator to move the tubing string up and down or run coil tubing into or out of the wellbore without removing the tool. This reduces operation costs, saves time and enables many new procedures that were previously impossible or impractical. unlocked position to a locked position when said male and female retainer means are in alignment for locking said modules together, wherein said frame members, are in the form of rectangular metal tubes. 2. The locking mechanism of claim 1 in which the means to move the locking arm is located on the outside of the module. 3. The locking mechanism of claim 2 in which the movement of the locking arm is effected by a hand tool. 4. The locking mechanism of claim 1 in which the male retainer means is located within the frame member of said first module. 5. The locking mechanism of claim 1 in which the motion of the locking arm is controlled by a rotor/cam mechanism which is actuated by a hand tool. 6. The locking mechanism of claim 1 in which the modules are separated by resilient seal means. erature sensor for detecting an intake air temperature of said engine; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, and said intake air temperature sensor, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said engine intake air temperature is higher than a predetermined temperature and lower than a multiple of said engine coolant temperature if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 3. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; a passenger compartment temperature sensor for detecting a passenger compartment temperature in a passenger compartment; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, and said passenger compartment temperature sensor, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said passenger compartment temperature is lower than a multiple of said engine coolant temperature if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 4. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; engine shutoff time measuring means for measuring an engine shutoff time which has elapsed from a preceding engine shutoff to a present engine startup; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, and said engine shutoff time measuring means, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said engine coolant temperature is lower than a predetermined temperature and said engine shutoff time is lower than a predetermined time if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 5. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; an engine intake air temperature sensor for detecting an intake air temperature of said engine; engine shutoff time measuring means for measuring an engine shutoff time which has elapsed from a preceding engine shutoff to a present engine startup; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, said engine intake air temperature sensor, and said engine shutoff time measuring means, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said intake air temperature is higher than a predetermined temperature and lower than a multiple of said engine coolant temperature and said engine shutoff time is lower than a predetermined time if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 6. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; an engine rotational speed sensor for detecting a rotational speed of said engine; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, and said engine rotational speed sensor, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state to actuate said air-conditioning system compressor when said engine coolant temperature is lower than a predetermined temperature and said engine rotational speed is lower than a predetermined rotational speed if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 7. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; an engine intake air temperature sensor for detecting an intake air temperature of said engine; an engine rotational speed sensor for detecting a rotational speed of said engine; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, said engine intake air temperature sensor, and said engine rotational speed sensor, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said intake air temperature is higher than a predetermined temperature and lower than a multiple of said engine coolant temperature and said engine rotational speed is lower than a predetermined rotational speed if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 8. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; a passenger compartment temperature sensor for detecting a passenger compartment temperature in a passenger compartment; an engine rotational speed sensor for detecting a rotational speed of said engine; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, said passenger compartment temperature sensor, and said engine rotational speed sensor, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said passenger compartment temperature is lower than a multiple of said engine coolant temperature and said engine rotational speed is lower than a predetermined rotational speed if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected. 9. A motor vehicle air-conditioner control apparatus comprising: engine start detecting means for detecting a startup of an engine; an air-conditioning system compressor operable by the power of said engine through a clutch; an air-conditioning system operating switch for making said air-conditioning system compressor operable; an engine coolant temperature sensor for detecting an engine coolant temperature; an engine rotational speed sensor for detecting a rotational speed of said engine; engine operating time measuring means for measuring an engine operating time which has elapsed from the startup of said engine; and control means electrically connected to said engine start detecting means, said clutch, said air-conditioning system operating switch, said engine coolant temperature sensor, said engine rotational speed sensor, and said engine operating time measuring means, for selectively engaging and disengaging said clutch; said control means comprising means for changing said clutch from a disengaged state to an engaged state after a liquid refrigerant is discharged from said air-conditioning system compressor to actuate said air-conditioning system compressor when said engine coolant temperature is lower than a predetermined temperature and said engine rotational speed is higher than a predetermined rotational speed, on the condition that said engine operating time is longer than a predetermined time, if said air-conditioning system operating switch is detected as being turned on after the startup of said engine is detected.
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