Double-cock ball throwing device and ball throwing method
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A technology of ball-throwing device and double cock, which is applied in the direction of wellbore/well valve device, earthwork drilling and production, wellbore/well parts, etc. It can solve the problems of difficult installation process, time-wasting, difficult operation, etc., and achieve high work efficiency , Strong operability and practical effect
Active Publication Date: 2012-03-21
BC P INC CHINA NAT PETROLEUM CORP +1
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This method cannot continuously cast nylon balls in single layer and multiple stages (because using liquid nitrogen to throw balls is to put a certain number of nylon balls into the ball throwing device in advance (for example, according to the construction design requirements, 50 nylon balls need to be thrown after the first stage, and the second 50 nylon balls after the end of the stage), that is to say, only 50 nylon balls can be installed in the ball throwing device at a time by using this method, and only two stages of continuous fracturing can be realized, and the third stage of continuous fracturing cannot be realized
Three or more sections are called multi-sections), and the numbe
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Embodiment 1
[0079] see figure 1 , the assembly, disassembly process and working principle of the present invention are as follows:
[0080] (1) When assembling the present invention, first install the left and right T-shaped high-pressure tees 2 and 4 on the high-voltage main line 1, check the stability of the high-pressure main line 1 and the connection at the oil pan, and ensure that the connection does not puncture No leakage (that is, there is no leakage at the connection of the pipeline, so as to ensure that the entire pipeline is well sealed); then connect the left and right cocks 5 and 6 with oil nonels (referring to a conventional connection method, the female port is a non-oil ring , the male port is threaded, and the oil ring is connected when it reaches the threaded place) to the T-shaped high-pressure tee 2, 4 on the left and right sides, and then put the left and right cock handles 10, 11 in the closed position; The left and right cocks 5 and 6 are connected by using the hig...
Embodiment 2
[0084] see figure 2 , the assembly, disassembly process and working principle of the present invention are as follows:
[0085] (1) When assembling the present invention, first install the T-shaped high-pressure tee 2, 3, 4, and 5 on the high-pressure main line 1, and sequentially connect the cocks 6, 7, 8, and 9 to the T-shaped high-voltage On the tee 2, 3, 4, 5; connect the left two cocks 6, 7 with the high-pressure elbow 14, 15 and the high-pressure pipeline 18 connected to the left elbow, and the right two cocks 8, 9 The high-pressure elbows 16, 17 and the high-pressure pipeline 19 connected to the right elbow are used for connection, and different types of balls are respectively loaded into the high-pressure pipeline 18 connected to the left elbow and the high-pressure pipeline 19 connected to the right elbow according to the construction design requirements. High-pressure pipeline 19; when starting fracturing, the cock handles 10, 11, 12, and 13 are respectively in the...
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Abstract
The invention relates to a double-cock ball throwing device and a ball throwing method. The device is characterized by comprising two T-shaped high-pressure tee joints arranged in the front and the back of a high-pressure main pipeline, wherein the raised ends of the two T-shaped high-pressure tee joints are respectively connected with cocks; the two cocks are respectively connected with two ends of the same high-pressure pipeline through high-pressure elbows, so that a loop is formed in the high-pressure pipeline; and the cocks are provided with cock rocking handles. Through a set of ball throwing system consisting of the two T-shaped high-pressure tee joints, the two cocks and a plurality of high-pressure pipelines, nylon balls are thrown by manually operating the cocks; a process of throwing balls without stopping a pump in the midway is realized by filling a certain number of nylon balls or steel balls into the high-pressure pipeline between the two cocks in advance; a space of 5 to 8 millimeters is respectively formed in the two cocks in construction, so that the pressure of the high-pressure pipelines of two sections and the middle of the cocks is balanced all the time, and the nylon balls can smoothly enter a shaft; and by arranging multistage double cocks on the main pipeline, the number of the thrown balls can be controlled, and meanwhile, the sequence of throwing different balls can be randomly controlled.
Description
technical field [0001] The invention relates to a double cock pitching device and a pitching method. Background technique [0002] In coalbed methane wells, a certain horizon in some wells is divided into upper and lower sections or three sections. Depending on the layer interpretation of different coalbed methane wells, sometimes it is necessary to perform staged fracturing on the upper and lower two to three layers of the same layer to achieve the purpose of improving the reservoir and increasing production and efficiency. The construction method of single-layer staged fracturing in conventional gas wells is to use a liquid nitrogen pump truck to inject liquid nitrogen while injecting liquid nitrogen in the state of non-stop pumping, but this method is limited to single-layer two-stage fracturing. In view of the special geological structure and construction technology of Daning-Jixian CBM wells in Shanxi, liquid nitrogen injection is not required and nylon balls need to b...
Claims
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